[ARVADOS] created: 1.2.0-316-g233fd4313

Git user git at public.curoverse.com
Mon Nov 5 13:27:07 EST 2018


        at  233fd4313a240d98efdd3b51b845cf40e9645f91 (commit)


commit 233fd4313a240d98efdd3b51b845cf40e9645f91
Author: Peter Amstutz <pamstutz at veritasgenetics.com>
Date:   Mon Nov 5 10:16:48 2018 -0500

    14198: Unit tests pass again
    
    Arvados-DCO-1.1-Signed-off-by: Peter Amstutz <pamstutz at veritasgenetics.com>

diff --git a/sdk/cwl/arvados_cwl/__init__.py b/sdk/cwl/arvados_cwl/__init__.py
index 141c74de4..a29bafb22 100644
--- a/sdk/cwl/arvados_cwl/__init__.py
+++ b/sdk/cwl/arvados_cwl/__init__.py
@@ -36,10 +36,12 @@ from .executor import ArvCwlExecutor
 # These arn't used directly in this file but
 # other code expects to import them from here
 from .arvcontainer import ArvadosContainer
+from .arvjob import ArvadosJob
 from .arvtool import ArvadosCommandTool
-from .fsaccess import CollectionFsAccess, CollectionCache
+from .fsaccess import CollectionFsAccess, CollectionCache, CollectionFetcher
 from .util import get_current_container
 from .executor import RuntimeStatusLoggingHandler, DEFAULT_PRIORITY
+from .arvworkflow import ArvadosWorkflow
 
 logger = logging.getLogger('arvados.cwl-runner')
 metrics = logging.getLogger('arvados.cwl-runner.metrics')
diff --git a/sdk/cwl/arvados_cwl/arvjob.py b/sdk/cwl/arvados_cwl/arvjob.py
index 189282ec2..9a03372d3 100644
--- a/sdk/cwl/arvados_cwl/arvjob.py
+++ b/sdk/cwl/arvados_cwl/arvjob.py
@@ -30,6 +30,7 @@ from .pathmapper import VwdPathMapper, trim_listing
 from .perf import Perf
 from . import done
 from ._version import __version__
+from .util import get_intermediate_collection_info
 
 logger = logging.getLogger('arvados.cwl-runner')
 metrics = logging.getLogger('arvados.cwl-runner.metrics')
diff --git a/sdk/cwl/arvados_cwl/arvworkflow.py b/sdk/cwl/arvados_cwl/arvworkflow.py
index b689e94ef..72ef8fd4f 100644
--- a/sdk/cwl/arvados_cwl/arvworkflow.py
+++ b/sdk/cwl/arvados_cwl/arvworkflow.py
@@ -22,7 +22,7 @@ import ruamel.yaml as yaml
 from .runner import (upload_dependencies, packed_workflow, upload_workflow_collection,
                      trim_anonymous_location, remove_redundant_fields, discover_secondary_files)
 from .pathmapper import ArvPathMapper, trim_listing
-from .arvtool import ArvadosCommandTool
+from .arvtool import ArvadosCommandTool, check_cluster_target
 from .perf import Perf
 
 logger = logging.getLogger('arvados.cwl-runner')

commit 8ba1008fd4637b3cbd54b155277e3f2b31cd56e7
Author: Peter Amstutz <pamstutz at veritasgenetics.com>
Date:   Fri Nov 2 17:05:20 2018 -0400

    14198: test_submit passes
    
    Arvados-DCO-1.1-Signed-off-by: Peter Amstutz <pamstutz at veritasgenetics.com>

diff --git a/sdk/cwl/tests/test_submit.py b/sdk/cwl/tests/test_submit.py
index 53a4a17ee..0fd824fbe 100644
--- a/sdk/cwl/tests/test_submit.py
+++ b/sdk/cwl/tests/test_submit.py
@@ -1216,43 +1216,45 @@ class TestSubmit(unittest.TestCase):
         self.assertEqual(capture_stdout.getvalue(),
                          stubs.expect_container_request_uuid + '\n')
 
+    def tearDown(self):
+        arvados_cwl.arvdocker.arv_docker_clear_cache()
 
     @mock.patch("arvados.commands.keepdocker.find_one_image_hash")
     @mock.patch("cwltool.docker.DockerCommandLineJob.get_image")
     @mock.patch("arvados.api")
     def test_arvados_jobs_image(self, api, get_image, find_one_image_hash):
-        try:
-            arvrunner = mock.MagicMock()
-            arvrunner.project_uuid = ""
-            api.return_value = mock.MagicMock()
-            arvrunner.api = api.return_value
-            arvrunner.api.links().list().execute.side_effect = ({"items": [{"created_at": "",
-                                                                            "head_uuid": "zzzzz-4zz18-zzzzzzzzzzzzzzb",
-                                                                            "link_class": "docker_image_repo+tag",
-                                                                            "name": "arvados/jobs:"+arvados_cwl.__version__,
-                                                                            "owner_uuid": "",
-                                                                            "properties": {"image_timestamp": ""}}], "items_available": 1, "offset": 0},
-                                                                {"items": [{"created_at": "",
-                                                                            "head_uuid": "",
-                                                                            "link_class": "docker_image_hash",
-                                                                            "name": "123456",
-                                                                            "owner_uuid": "",
-                                                                            "properties": {"image_timestamp": ""}}], "items_available": 1, "offset": 0}
-            )
-            find_one_image_hash.return_value = "123456"
-
-            arvrunner.api.collections().list().execute.side_effect = ({"items": [{"uuid": "zzzzz-4zz18-zzzzzzzzzzzzzzb",
-                                                                                  "owner_uuid": "",
-                                                                                  "manifest_text": "",
-                                                                                  "properties": ""
-                                                                              }], "items_available": 1, "offset": 0},)
-            arvrunner.api.collections().create().execute.return_value = {"uuid": ""}
-            arvrunner.api.collections().get().execute.return_value = {"uuid": "zzzzz-4zz18-zzzzzzzzzzzzzzb",
-                                                                      "portable_data_hash": "9999999999999999999999999999999b+99"}
-            self.assertEqual("9999999999999999999999999999999b+99",
-                             arvados_cwl.runner.arvados_jobs_image(arvrunner, "arvados/jobs:"+arvados_cwl.__version__))
-        finally:
-            arvados_cwl.arvdocker.arv_docker_clear_cache()
+        arvados_cwl.arvdocker.arv_docker_clear_cache()
+
+        arvrunner = mock.MagicMock()
+        arvrunner.project_uuid = ""
+        api.return_value = mock.MagicMock()
+        arvrunner.api = api.return_value
+        arvrunner.api.links().list().execute.side_effect = ({"items": [{"created_at": "",
+                                                                        "head_uuid": "zzzzz-4zz18-zzzzzzzzzzzzzzb",
+                                                                        "link_class": "docker_image_repo+tag",
+                                                                        "name": "arvados/jobs:"+arvados_cwl.__version__,
+                                                                        "owner_uuid": "",
+                                                                        "properties": {"image_timestamp": ""}}], "items_available": 1, "offset": 0},
+                                                            {"items": [{"created_at": "",
+                                                                        "head_uuid": "",
+                                                                        "link_class": "docker_image_hash",
+                                                                        "name": "123456",
+                                                                        "owner_uuid": "",
+                                                                        "properties": {"image_timestamp": ""}}], "items_available": 1, "offset": 0}
+        )
+        find_one_image_hash.return_value = "123456"
+
+        arvrunner.api.collections().list().execute.side_effect = ({"items": [{"uuid": "zzzzz-4zz18-zzzzzzzzzzzzzzb",
+                                                                              "owner_uuid": "",
+                                                                              "manifest_text": "",
+                                                                              "properties": ""
+                                                                          }], "items_available": 1, "offset": 0},)
+        arvrunner.api.collections().create().execute.return_value = {"uuid": ""}
+        arvrunner.api.collections().get().execute.return_value = {"uuid": "zzzzz-4zz18-zzzzzzzzzzzzzzb",
+                                                                  "portable_data_hash": "9999999999999999999999999999999b+99"}
+        self.assertEqual("9999999999999999999999999999999b+99",
+                         arvados_cwl.runner.arvados_jobs_image(arvrunner, "arvados/jobs:"+arvados_cwl.__version__))
+
 
     @stubs
     def test_submit_secrets(self, stubs):

commit 8b5909c28fcf320980b50a81ee7dc37ed56fbafd
Author: Peter Amstutz <pamstutz at veritasgenetics.com>
Date:   Fri Nov 2 16:41:01 2018 -0400

    14198: More test updates
    
    Arvados-DCO-1.1-Signed-off-by: Peter Amstutz <pamstutz at veritasgenetics.com>

diff --git a/sdk/cwl/tests/test_submit.py b/sdk/cwl/tests/test_submit.py
index ab4e7e510..53a4a17ee 100644
--- a/sdk/cwl/tests/test_submit.py
+++ b/sdk/cwl/tests/test_submit.py
@@ -50,7 +50,8 @@ def stubs(func):
         stubs.docker_images = {
             "arvados/jobs:"+arvados_cwl.__version__: [("zzzzz-4zz18-zzzzzzzzzzzzzd3", "")],
             "debian:8": [("zzzzz-4zz18-zzzzzzzzzzzzzd4", "")],
-            "arvados/jobs:123": [("zzzzz-4zz18-zzzzzzzzzzzzzd5", "")]
+            "arvados/jobs:123": [("zzzzz-4zz18-zzzzzzzzzzzzzd5", "")],
+            "arvados/jobs:latest": [("zzzzz-4zz18-zzzzzzzzzzzzzd6", "")],
         }
         def kd(a, b, image_name=None, image_tag=None):
             return stubs.docker_images.get("%s:%s" % (image_name, image_tag), [])
@@ -117,6 +118,11 @@ def stubs(func):
                 "uuid": "zzzzz-4zz18-zzzzzzzzzzzzzd5",
                 "portable_data_hash": "999999999999999999999999999999d5+99",
                 "manifest_text": ""
+            },
+            "zzzzz-4zz18-zzzzzzzzzzzzzd6": {
+                "uuid": "zzzzz-4zz18-zzzzzzzzzzzzzd6",
+                "portable_data_hash": "999999999999999999999999999999d6+99",
+                "manifest_text": ""
             }
         }
         stubs.api.collections().create.side_effect = functools.partial(collection_createstub, created_collections)
@@ -1739,12 +1745,12 @@ class TestTemplateInputs(unittest.TestCase):
         "components": {
             "inputs_test.cwl": {
                 'runtime_constraints': {
-                    'docker_image': 'arvados/jobs:'+arvados_cwl.__version__,
+                    'docker_image': '999999999999999999999999999999d3+99',
                     'min_ram_mb_per_node': 1024
                 },
                 'script_parameters': {
                     'cwl:tool':
-                    '6c5ee1cd606088106d9f28367cde1e41+60/workflow.cwl#main',
+                    'a2de777156fb700f1363b1f2e370adca+60/workflow.cwl#main',
                     'optionalFloatInput': None,
                     'fileInput': {
                         'type': 'File',
@@ -1805,7 +1811,7 @@ class TestTemplateInputs(unittest.TestCase):
         params = expect_template[
             "components"]["inputs_test.cwl"]["script_parameters"]
         params["fileInput"]["value"] = '169f39d466a5438ac4a90e779bf750c7+53/blorp.txt'
-        params["cwl:tool"] = '6c5ee1cd606088106d9f28367cde1e41+60/workflow.cwl#main'
+        params["cwl:tool"] = 'a2de777156fb700f1363b1f2e370adca+60/workflow.cwl#main'
         params["floatInput"]["value"] = 1.234
         params["boolInput"]["value"] = True
 
diff --git a/sdk/cwl/tests/wf/expect_packed.cwl b/sdk/cwl/tests/wf/expect_packed.cwl
index c84252c7b..cb2e5ff56 100644
--- a/sdk/cwl/tests/wf/expect_packed.cwl
+++ b/sdk/cwl/tests/wf/expect_packed.cwl
@@ -25,7 +25,8 @@
             "requirements": [
                 {
                     "class": "DockerRequirement",
-                    "dockerPull": "debian:8"
+                    "dockerPull": "debian:8",
+                    "http://arvados.org/cwl#dockerCollectionPDH": "999999999999999999999999999999d4+99"
                 }
             ]
         },

commit dbb214edca328d85d87c337f0be2428849aee649
Author: Peter Amstutz <pamstutz at veritasgenetics.com>
Date:   Fri Nov 2 16:05:29 2018 -0400

    14198: Bringing unit tests up to date WIP
    
    Arvados-DCO-1.1-Signed-off-by: Peter Amstutz <pamstutz at veritasgenetics.com>

diff --git a/sdk/cwl/arvados_cwl/__init__.py b/sdk/cwl/arvados_cwl/__init__.py
index 63fc3ea47..141c74de4 100644
--- a/sdk/cwl/arvados_cwl/__init__.py
+++ b/sdk/cwl/arvados_cwl/__init__.py
@@ -13,27 +13,33 @@ import sys
 import re
 import pkg_resources  # part of setuptools
 
+from schema_salad.sourceline import SourceLine
+import schema_salad.validate as validate
 import cwltool.main
 import cwltool.workflow
 import cwltool.process
-from schema_salad.sourceline import SourceLine
-import schema_salad.validate as validate
 import cwltool.argparser
+from cwltool.process import shortname, UnsupportedRequirement, use_custom_schema
+from cwltool.pathmapper import adjustFileObjs, adjustDirObjs, get_listing
 
 import arvados
 import arvados.config
 from arvados.keep import KeepClient
 from arvados.errors import ApiError
 import arvados.commands._util as arv_cmd
+from arvados.api import OrderedJsonModel
 
 from .perf import Perf
 from ._version import __version__
 from .executor import ArvCwlExecutor
 
-from cwltool.process import shortname, UnsupportedRequirement, use_custom_schema
-from cwltool.pathmapper import adjustFileObjs, adjustDirObjs, get_listing
-
-from arvados.api import OrderedJsonModel
+# These arn't used directly in this file but
+# other code expects to import them from here
+from .arvcontainer import ArvadosContainer
+from .arvtool import ArvadosCommandTool
+from .fsaccess import CollectionFsAccess, CollectionCache
+from .util import get_current_container
+from .executor import RuntimeStatusLoggingHandler, DEFAULT_PRIORITY
 
 logger = logging.getLogger('arvados.cwl-runner')
 metrics = logging.getLogger('arvados.cwl-runner.metrics')
@@ -43,8 +49,6 @@ arvados.log_handler.setFormatter(logging.Formatter(
         '%(asctime)s %(name)s %(levelname)s: %(message)s',
         '%Y-%m-%d %H:%M:%S'))
 
-DEFAULT_PRIORITY = 500
-
 def versionstring():
     """Print version string of key packages for provenance and debugging."""
 
diff --git a/sdk/cwl/arvados_cwl/arvcontainer.py b/sdk/cwl/arvados_cwl/arvcontainer.py
index 100329b69..278ff08e9 100644
--- a/sdk/cwl/arvados_cwl/arvcontainer.py
+++ b/sdk/cwl/arvados_cwl/arvcontainer.py
@@ -12,7 +12,7 @@ import ciso8601
 import uuid
 import math
 
-from arvados_cwl.util import get_current_container, get_intermediate_collection_info
+import arvados_cwl.util
 import ruamel.yaml as yaml
 
 from cwltool.errors import WorkflowException
@@ -171,8 +171,8 @@ class ArvadosContainer(JobBase):
                 keepemptydirs(vwd)
 
                 if not runtimeContext.current_container:
-                    runtimeContext.current_container = get_current_container(self.arvrunner.api, self.arvrunner.num_retries, logger)
-                info = get_intermediate_collection_info(self.name, runtimeContext.current_container, runtimeContext.intermediate_output_ttl)
+                    runtimeContext.current_container = arvados_cwl.util.get_current_container(self.arvrunner.api, self.arvrunner.num_retries, logger)
+                info = arvados_cwl.util.get_intermediate_collection_info(self.name, runtimeContext.current_container, runtimeContext.intermediate_output_ttl)
                 vwd.save_new(name=info["name"],
                              owner_uuid=self.arvrunner.project_uuid,
                              ensure_unique_name=True,
diff --git a/sdk/cwl/arvados_cwl/arvjob.py b/sdk/cwl/arvados_cwl/arvjob.py
index 1287fbb6e..189282ec2 100644
--- a/sdk/cwl/arvados_cwl/arvjob.py
+++ b/sdk/cwl/arvados_cwl/arvjob.py
@@ -18,7 +18,7 @@ from cwltool.job import JobBase
 
 from schema_salad.sourceline import SourceLine
 
-from arvados_cwl.util import get_current_container, get_intermediate_collection_info
+import arvados_cwl.util
 import ruamel.yaml as yaml
 
 import arvados.collection
@@ -77,9 +77,7 @@ class ArvadosJob(JobBase):
 
                 if vwd:
                     with Perf(metrics, "generatefiles.save_new %s" % self.name):
-                        if not runtimeContext.current_container:
-                            runtimeContext.current_container = get_current_container(self.arvrunner.api, self.arvrunner.num_retries, logger)
-                        info = get_intermediate_collection_info(self.name, runtimeContext.current_container, runtimeContext.intermediate_output_ttl)
+                        info = get_intermediate_collection_info(self.name, None, runtimeContext.intermediate_output_ttl)
                         vwd.save_new(name=info["name"],
                                      owner_uuid=self.arvrunner.project_uuid,
                                      ensure_unique_name=True,
diff --git a/sdk/cwl/arvados_cwl/crunch_script.py b/sdk/cwl/arvados_cwl/crunch_script.py
index 9f0c91f11..7512d5bef 100644
--- a/sdk/cwl/arvados_cwl/crunch_script.py
+++ b/sdk/cwl/arvados_cwl/crunch_script.py
@@ -104,7 +104,7 @@ def run():
         arvargs.output_tags = output_tags
         arvargs.thread_count = 1
 
-        runner = arvados_cwl.ArvCwlRunner(api_client=arvados.safeapi.ThreadSafeApiCache(
+        runner = arvados_cwl.ArvCwlExecutor(api_client=arvados.safeapi.ThreadSafeApiCache(
             api_params={"model": OrderedJsonModel()}, keep_params={"num_retries": 4}),
                                           arvargs=arvargs)
 
diff --git a/sdk/cwl/arvados_cwl/executor.py b/sdk/cwl/arvados_cwl/executor.py
index 8c2023e18..c6dc71629 100644
--- a/sdk/cwl/arvados_cwl/executor.py
+++ b/sdk/cwl/arvados_cwl/executor.py
@@ -23,6 +23,7 @@ import arvados.config
 from arvados.keep import KeepClient
 from arvados.errors import ApiError
 
+import arvados_cwl.util
 from .arvcontainer import RunnerContainer
 from .arvjob import RunnerJob, RunnerTemplate
 from .runner import Runner, upload_docker, upload_job_order, upload_workflow_deps
@@ -33,7 +34,6 @@ from .perf import Perf
 from .pathmapper import NoFollowPathMapper
 from .task_queue import TaskQueue
 from .context import ArvLoadingContext, ArvRuntimeContext
-from .util import get_current_container
 from ._version import __version__
 
 from cwltool.process import shortname, UnsupportedRequirement, use_custom_schema
@@ -43,6 +43,8 @@ from cwltool.command_line_tool import compute_checksums
 logger = logging.getLogger('arvados.cwl-runner')
 metrics = logging.getLogger('arvados.cwl-runner.metrics')
 
+DEFAULT_PRIORITY = 500
+
 class RuntimeStatusLoggingHandler(logging.Handler):
     """
     Intercepts logging calls and report them as runtime statuses on runner
@@ -167,7 +169,7 @@ http://doc.arvados.org/install/install-api-server.html#disable_api_methods
 
         # Add a custom logging handler to the root logger for runtime status reporting
         # if running inside a container
-        if get_current_container(self.api, self.num_retries, logger):
+        if arvados_cwl.util.get_current_container(self.api, self.num_retries, logger):
             root_logger = logging.getLogger('')
             handler = RuntimeStatusLoggingHandler(self.runtime_status_update)
             root_logger.addHandler(handler)
@@ -222,7 +224,7 @@ http://doc.arvados.org/install/install-api-server.html#disable_api_methods
         activity statuses, for example in the RuntimeStatusLoggingHandler.
         """
         with self.workflow_eval_lock:
-            current = get_current_container(self.api, self.num_retries, logger)
+            current = arvados_cwl.util.get_current_container(self.api, self.num_retries, logger)
             if current is None:
                 return
             runtime_status = current.get('runtime_status', {})
@@ -465,7 +467,7 @@ http://doc.arvados.org/install/install-api-server.html#disable_api_methods
 
     def set_crunch_output(self):
         if self.work_api == "containers":
-            current = get_current_container(self.api, self.num_retries, logger)
+            current = arvados_cwl.util.get_current_container(self.api, self.num_retries, logger)
             if current is None:
                 return
             try:
@@ -626,7 +628,7 @@ http://doc.arvados.org/install/install-api-server.html#disable_api_methods
             runnerjob.run(submitargs)
             return (runnerjob.uuid, "success")
 
-        current_container = get_current_container(self.api, self.num_retries, logger)
+        current_container = arvados_cwl.util.get_current_container(self.api, self.num_retries, logger)
         if current_container:
             logger.info("Running inside container %s", current_container.get("uuid"))
 
diff --git a/sdk/cwl/arvados_cwl/pathmapper.py b/sdk/cwl/arvados_cwl/pathmapper.py
index d083b78f5..26c85d300 100644
--- a/sdk/cwl/arvados_cwl/pathmapper.py
+++ b/sdk/cwl/arvados_cwl/pathmapper.py
@@ -8,7 +8,7 @@ import uuid
 import os
 import urllib
 
-from arvados_cwl.util import get_current_container, get_intermediate_collection_info
+import arvados_cwl.util
 import arvados.commands.run
 import arvados.collection
 
@@ -155,8 +155,8 @@ class ArvPathMapper(PathMapper):
                 for l in srcobj.get("listing", []):
                     self.addentry(l, c, ".", remap)
 
-                container = get_current_container(self.arvrunner.api, self.arvrunner.num_retries, logger)
-                info = get_intermediate_collection_info(None, container, self.arvrunner.intermediate_output_ttl)
+                container = arvados_cwl.util.get_current_container(self.arvrunner.api, self.arvrunner.num_retries, logger)
+                info = arvados_cwl.util.get_intermediate_collection_info(None, container, self.arvrunner.intermediate_output_ttl)
 
                 c.save_new(name=info["name"],
                            owner_uuid=self.arvrunner.project_uuid,
@@ -174,8 +174,8 @@ class ArvPathMapper(PathMapper):
                                                   num_retries=self.arvrunner.num_retries                                                  )
                 self.addentry(srcobj, c, ".", remap)
 
-                container = get_current_container(self.arvrunner.api, self.arvrunner.num_retries, logger)
-                info = get_intermediate_collection_info(None, container, self.arvrunner.intermediate_output_ttl)
+                container = arvados_cwl.util.get_current_container(self.arvrunner.api, self.arvrunner.num_retries, logger)
+                info = arvados_cwl.util.get_intermediate_collection_info(None, container, self.arvrunner.intermediate_output_ttl)
 
                 c.save_new(name=info["name"],
                            owner_uuid=self.arvrunner.project_uuid,
diff --git a/sdk/cwl/arvados_cwl/runner.py b/sdk/cwl/arvados_cwl/runner.py
index 31a424d30..a846f2b00 100644
--- a/sdk/cwl/arvados_cwl/runner.py
+++ b/sdk/cwl/arvados_cwl/runner.py
@@ -26,7 +26,7 @@ from cwltool.pack import pack
 import arvados.collection
 import ruamel.yaml as yaml
 
-import arvdocker
+import arvados_cwl.arvdocker
 from .pathmapper import ArvPathMapper, trim_listing
 from ._version import __version__
 from . import done
@@ -215,9 +215,9 @@ def upload_docker(arvrunner, tool):
                 # TODO: can be supported by containers API, but not jobs API.
                 raise SourceLine(docker_req, "dockerOutputDirectory", UnsupportedRequirement).makeError(
                     "Option 'dockerOutputDirectory' of DockerRequirement not supported.")
-            arvdocker.arv_docker_get_image(arvrunner.api, docker_req, True, arvrunner.project_uuid)
+            arvados_cwl.arvdocker.arv_docker_get_image(arvrunner.api, docker_req, True, arvrunner.project_uuid)
         else:
-            arvdocker.arv_docker_get_image(arvrunner.api, {"dockerPull": "arvados/jobs"}, True, arvrunner.project_uuid)
+            arvados_cwl.arvdocker.arv_docker_get_image(arvrunner.api, {"dockerPull": "arvados/jobs"}, True, arvrunner.project_uuid)
     elif isinstance(tool, cwltool.workflow.Workflow):
         for s in tool.steps:
             upload_docker(arvrunner, s.embedded_tool)
@@ -245,8 +245,7 @@ def packed_workflow(arvrunner, tool, merged_map):
             if "location" in v and v["location"] in merged_map[cur_id].secondaryFiles:
                 v["secondaryFiles"] = merged_map[cur_id].secondaryFiles[v["location"]]
             if v.get("class") == "DockerRequirement":
-                img = v.get("dockerImageId") or v.get("dockerPull")
-                v["http://arvados.org/cwl#dockerCollectionPDH"] = arvdocker.cached_lookups[img]
+                v["http://arvados.org/cwl#dockerCollectionPDH"] = arvados_cwl.arvdocker.arv_docker_get_image(arvrunner.api, v, True, arvrunner.project_uuid)
             for l in v:
                 visit(v[l], cur_id)
         if isinstance(v, list):
@@ -327,7 +326,7 @@ def arvados_jobs_image(arvrunner, img):
     """Determine if the right arvados/jobs image version is available.  If not, try to pull and upload it."""
 
     try:
-        return arvdocker.arv_docker_get_image(arvrunner.api, {"dockerPull": img}, True, arvrunner.project_uuid)
+        return arvados_cwl.arvdocker.arv_docker_get_image(arvrunner.api, {"dockerPull": img}, True, arvrunner.project_uuid)
     except Exception as e:
         raise Exception("Docker image %s is not available\n%s" % (img, e) )
 
diff --git a/sdk/cwl/tests/test_container.py b/sdk/cwl/tests/test_container.py
index 46184325f..c875c0785 100644
--- a/sdk/cwl/tests/test_container.py
+++ b/sdk/cwl/tests/test_container.py
@@ -4,6 +4,7 @@
 
 import arvados_cwl
 import arvados_cwl.context
+import arvados_cwl.util
 from arvados_cwl.arvdocker import arv_docker_clear_cache
 import copy
 import arvados.config
@@ -132,7 +133,7 @@ class TestContainer(unittest.TestCase):
                         'owner_uuid': 'zzzzz-8i9sb-zzzzzzzzzzzzzzz',
                         'output_path': '/var/spool/cwl',
                         'output_ttl': 0,
-                        'container_image': 'arvados/jobs',
+                        'container_image': '99999999999999999999999999999993+99',
                         'command': ['ls', '/var/spool/cwl'],
                         'cwd': '/var/spool/cwl',
                         'scheduling_parameters': {},
@@ -219,7 +220,7 @@ class TestContainer(unittest.TestCase):
             'owner_uuid': 'zzzzz-8i9sb-zzzzzzzzzzzzzzz',
             'output_path': '/var/spool/cwl',
             'output_ttl': 7200,
-            'container_image': 'arvados/jobs',
+            'container_image': '99999999999999999999999999999993+99',
             'command': ['ls'],
             'cwd': '/var/spool/cwl',
             'scheduling_parameters': {
@@ -351,7 +352,7 @@ class TestContainer(unittest.TestCase):
             'owner_uuid': 'zzzzz-8i9sb-zzzzzzzzzzzzzzz',
             'output_path': '/var/spool/cwl',
             'output_ttl': 0,
-            'container_image': 'arvados/jobs',
+            'container_image': '99999999999999999999999999999993+99',
             'command': ['ls'],
             'cwd': '/var/spool/cwl',
             'scheduling_parameters': {
@@ -439,7 +440,7 @@ class TestContainer(unittest.TestCase):
                     'owner_uuid': 'zzzzz-8i9sb-zzzzzzzzzzzzzzz',
                     'output_path': '/var/spool/cwl',
                     'output_ttl': 0,
-                    'container_image': 'arvados/jobs',
+                    'container_image': '99999999999999999999999999999993+99',
                     'command': ['ls', '/var/spool/cwl'],
                     'cwd': '/var/spool/cwl',
                     'scheduling_parameters': {},
@@ -465,7 +466,10 @@ class TestContainer(unittest.TestCase):
 
         col().open.return_value = []
 
+        loadingContext, runtimeContext = self.helper(runner)
+
         arvjob = arvados_cwl.ArvadosContainer(runner,
+                                              runtimeContext,
                                               mock.MagicMock(),
                                               {},
                                               None,
@@ -496,7 +500,7 @@ class TestContainer(unittest.TestCase):
         arvjob.output_callback.assert_called_with({"out": "stuff"}, "success")
         runner.add_intermediate_output.assert_called_with("zzzzz-4zz18-zzzzzzzzzzzzzz2")
 
-    @mock.patch("arvados_cwl.get_current_container")
+    @mock.patch("arvados_cwl.util.get_current_container")
     @mock.patch("arvados.collection.CollectionReader")
     @mock.patch("arvados.collection.Collection")
     def test_child_failure(self, col, reader, gcc_mock):
@@ -507,11 +511,11 @@ class TestContainer(unittest.TestCase):
         # Set up runner with mocked runtime_status_update()
         self.assertFalse(gcc_mock.called)
         runtime_status_update = mock.MagicMock()
-        arvados_cwl.ArvCwlRunner.runtime_status_update = runtime_status_update
-        runner = arvados_cwl.ArvCwlRunner(api)
+        arvados_cwl.ArvCwlExecutor.runtime_status_update = runtime_status_update
+        runner = arvados_cwl.ArvCwlExecutor(api)
         self.assertEqual(runner.work_api, 'containers')
 
-        # Make sure ArvCwlRunner thinks it's running inside a container so it
+        # Make sure ArvCwlExecutor thinks it's running inside a container so it
         # adds the logging handler that will call runtime_status_update() mock
         gcc_mock.return_value = {"uuid" : "zzzzz-dz642-zzzzzzzzzzzzzzz"}
         self.assertTrue(gcc_mock.called)
@@ -536,7 +540,10 @@ class TestContainer(unittest.TestCase):
 
         col().open.return_value = []
 
+        loadingContext, runtimeContext = self.helper(runner)
+
         arvjob = arvados_cwl.ArvadosContainer(runner,
+                                              runtimeContext,
                                               mock.MagicMock(),
                                               {},
                                               None,
@@ -648,7 +655,7 @@ class TestContainer(unittest.TestCase):
                     'owner_uuid': 'zzzzz-8i9sb-zzzzzzzzzzzzzzz',
                     'output_path': '/var/spool/cwl',
                     'output_ttl': 0,
-                    'container_image': 'arvados/jobs',
+                    'container_image': '99999999999999999999999999999994+99',
                     'command': ['ls', '/var/spool/cwl'],
                     'cwd': '/var/spool/cwl',
                     'scheduling_parameters': {},
@@ -741,7 +748,7 @@ class TestContainer(unittest.TestCase):
                     'owner_uuid': 'zzzzz-8i9sb-zzzzzzzzzzzzzzz',
                     'output_path': '/var/spool/cwl',
                     'output_ttl': 0,
-                    'container_image': 'arvados/jobs',
+                    'container_image': '99999999999999999999999999999993+99',
                     'command': ['md5sum', 'example.conf'],
                     'cwd': '/var/spool/cwl',
                     'scheduling_parameters': {},
diff --git a/sdk/cwl/tests/test_job.py b/sdk/cwl/tests/test_job.py
index 20efe1513..2aaac0ae5 100644
--- a/sdk/cwl/tests/test_job.py
+++ b/sdk/cwl/tests/test_job.py
@@ -13,6 +13,7 @@ import StringIO
 
 import arvados
 import arvados_cwl
+import arvados_cwl.executor
 import cwltool.process
 from arvados.errors import ApiError
 from schema_salad.ref_resolver import Loader
@@ -373,7 +374,7 @@ class TestWorkflow(unittest.TestCase):
         api = mock.MagicMock()
         api._rootDesc = get_rootDesc()
 
-        runner = arvados_cwl.ArvCwlRunner(api)
+        runner = arvados_cwl.executor.ArvCwlExecutor(api)
         self.assertEqual(runner.work_api, 'jobs')
 
         list_images_in_arv.return_value = [["zzzzz-4zz18-zzzzzzzzzzzzzzz"]]
@@ -455,7 +456,7 @@ class TestWorkflow(unittest.TestCase):
         api = mock.MagicMock()
         api._rootDesc = get_rootDesc()
 
-        runner = arvados_cwl.ArvCwlRunner(api)
+        runner = arvados_cwl.executor.ArvCwlExecutor(api)
         self.assertEqual(runner.work_api, 'jobs')
 
         list_images_in_arv.return_value = [["zzzzz-4zz18-zzzzzzzzzzzzzzz"]]
@@ -517,5 +518,5 @@ class TestWorkflow(unittest.TestCase):
         api = mock.MagicMock()
         api._rootDesc = copy.deepcopy(get_rootDesc())
         del api._rootDesc.get('resources')['jobs']['methods']['create']
-        runner = arvados_cwl.ArvCwlRunner(api)
+        runner = arvados_cwl.executor.ArvCwlExecutor(api)
         self.assertEqual(runner.work_api, 'containers')
diff --git a/sdk/cwl/tests/test_make_output.py b/sdk/cwl/tests/test_make_output.py
index 590c82d20..baeb4145e 100644
--- a/sdk/cwl/tests/test_make_output.py
+++ b/sdk/cwl/tests/test_make_output.py
@@ -12,6 +12,7 @@ import unittest
 
 import arvados
 import arvados_cwl
+import arvados_cwl.executor
 from .mock_discovery import get_rootDesc
 
 class TestMakeOutput(unittest.TestCase):
@@ -23,7 +24,7 @@ class TestMakeOutput(unittest.TestCase):
     @mock.patch("arvados.collection.CollectionReader")
     def test_make_output_collection(self, reader, col):
         keep_client = mock.MagicMock()
-        runner = arvados_cwl.ArvCwlRunner(self.api, keep_client=keep_client)
+        runner = arvados_cwl.executor.ArvCwlExecutor(self.api, keep_client=keep_client)
         runner.project_uuid = 'zzzzz-j7d0g-zzzzzzzzzzzzzzz'
 
         final = mock.MagicMock()
diff --git a/sdk/cwl/tests/test_pathmapper.py b/sdk/cwl/tests/test_pathmapper.py
index eaa571142..fb3c257d9 100644
--- a/sdk/cwl/tests/test_pathmapper.py
+++ b/sdk/cwl/tests/test_pathmapper.py
@@ -14,6 +14,7 @@ import arvados
 import arvados.keep
 import arvados.collection
 import arvados_cwl
+import arvados_cwl.executor
 
 from cwltool.pathmapper import MapperEnt
 from .mock_discovery import get_rootDesc
@@ -34,7 +35,7 @@ class TestPathmap(unittest.TestCase):
     def test_keepref(self):
         """Test direct keep references."""
 
-        arvrunner = arvados_cwl.ArvCwlRunner(self.api)
+        arvrunner = arvados_cwl.executor.ArvCwlExecutor(self.api)
 
         p = ArvPathMapper(arvrunner, [{
             "class": "File",
@@ -49,7 +50,7 @@ class TestPathmap(unittest.TestCase):
     def test_upload(self, statfile, upl):
         """Test pathmapper uploading files."""
 
-        arvrunner = arvados_cwl.ArvCwlRunner(self.api)
+        arvrunner = arvados_cwl.executor.ArvCwlExecutor(self.api)
 
         def statfile_mock(prefix, fn, fnPattern="$(file %s/%s)", dirPattern="$(dir %s/%s/)", raiseOSError=False):
             st = arvados.commands.run.UploadFile("", "tests/hw.py")
@@ -70,7 +71,7 @@ class TestPathmap(unittest.TestCase):
     @mock.patch("arvados.commands.run.statfile")
     def test_statfile(self, statfile, upl):
         """Test pathmapper handling ArvFile references."""
-        arvrunner = arvados_cwl.ArvCwlRunner(self.api)
+        arvrunner = arvados_cwl.executor.ArvCwlExecutor(self.api)
 
         # An ArvFile object returned from arvados.commands.run.statfile means the file is located on a
         # keep mount, so we can construct a direct reference directly without upload.
@@ -92,7 +93,7 @@ class TestPathmap(unittest.TestCase):
     @mock.patch("os.stat")
     def test_missing_file(self, stat):
         """Test pathmapper handling missing references."""
-        arvrunner = arvados_cwl.ArvCwlRunner(self.api)
+        arvrunner = arvados_cwl.executor.ArvCwlExecutor(self.api)
 
         stat.side_effect = OSError(2, "No such file or directory")
 
diff --git a/sdk/cwl/tests/test_submit.py b/sdk/cwl/tests/test_submit.py
index f718a86b3..ab4e7e510 100644
--- a/sdk/cwl/tests/test_submit.py
+++ b/sdk/cwl/tests/test_submit.py
@@ -15,6 +15,7 @@ import unittest
 import arvados
 import arvados.collection
 import arvados_cwl
+import arvados_cwl.executor
 import arvados_cwl.runner
 import arvados.keep
 
@@ -46,7 +47,15 @@ def stubs(func):
         keep_client2.put.side_effect = putstub
 
         stubs.keep_client = keep_client2
-        stubs.keepdocker.return_value = [("zzzzz-4zz18-zzzzzzzzzzzzzz3", "")]
+        stubs.docker_images = {
+            "arvados/jobs:"+arvados_cwl.__version__: [("zzzzz-4zz18-zzzzzzzzzzzzzd3", "")],
+            "debian:8": [("zzzzz-4zz18-zzzzzzzzzzzzzd4", "")],
+            "arvados/jobs:123": [("zzzzz-4zz18-zzzzzzzzzzzzzd5", "")]
+        }
+        def kd(a, b, image_name=None, image_tag=None):
+            return stubs.docker_images.get("%s:%s" % (image_name, image_tag), [])
+        stubs.keepdocker.side_effect = kd
+
         stubs.fake_user_uuid = "zzzzz-tpzed-zzzzzzzzzzzzzzz"
         stubs.fake_container_uuid = "zzzzz-dz642-zzzzzzzzzzzzzzz"
 
@@ -69,7 +78,7 @@ def stubs(func):
 
         def collection_createstub(created_collections, body, ensure_unique_name=None):
             mt = body["manifest_text"]
-            uuid = "zzzzz-4zz18-zzzzzzzzzzzzzz%d" % len(created_collections)
+            uuid = "zzzzz-4zz18-zzzzzzzzzzzzzx%d" % len(created_collections)
             pdh = "%s+%i" % (hashlib.md5(mt).hexdigest(), len(mt))
             created_collections[uuid] = {
                 "uuid": uuid,
@@ -93,6 +102,21 @@ def stubs(func):
                 "uuid": "",
                 "portable_data_hash": "99999999999999999999999999999994+99",
                 "manifest_text": ". 99999999999999999999999999999994+99 0:0:expect_arvworkflow.cwl"
+            },
+            "zzzzz-4zz18-zzzzzzzzzzzzzd3": {
+                "uuid": "zzzzz-4zz18-zzzzzzzzzzzzzd3",
+                "portable_data_hash": "999999999999999999999999999999d3+99",
+                "manifest_text": ""
+            },
+            "zzzzz-4zz18-zzzzzzzzzzzzzd4": {
+                "uuid": "zzzzz-4zz18-zzzzzzzzzzzzzd4",
+                "portable_data_hash": "999999999999999999999999999999d4+99",
+                "manifest_text": ""
+            },
+            "zzzzz-4zz18-zzzzzzzzzzzzzd5": {
+                "uuid": "zzzzz-4zz18-zzzzzzzzzzzzzd5",
+                "portable_data_hash": "999999999999999999999999999999d5+99",
+                "manifest_text": ""
             }
         }
         stubs.api.collections().create.side_effect = functools.partial(collection_createstub, created_collections)
@@ -117,7 +141,7 @@ def stubs(func):
         }
         stubs.expect_job_spec = {
             'runtime_constraints': {
-                'docker_image': 'arvados/jobs:'+arvados_cwl.__version__,
+                'docker_image': '999999999999999999999999999999d3+99',
                 'min_ram_mb_per_node': 1024
             },
             'script_parameters': {
@@ -141,7 +165,7 @@ def stubs(func):
                     }],
                     'class': 'Directory'
                 },
-                'cwl:tool': '3fffdeaa75e018172e1b583425f4ebff+60/workflow.cwl#main'
+                'cwl:tool': '57ad063d64c60dbddc027791f0649211+60/workflow.cwl#main'
             },
             'repository': 'arvados',
             'script_version': 'master',
@@ -155,7 +179,7 @@ def stubs(func):
             'owner_uuid': None,
             "components": {
                 "cwl-runner": {
-                    'runtime_constraints': {'docker_image': 'arvados/jobs:'+arvados_cwl.__version__, 'min_ram_mb_per_node': 1024},
+                    'runtime_constraints': {'docker_image': '999999999999999999999999999999d3+99', 'min_ram_mb_per_node': 1024},
                     'script_parameters': {
                         'y': {"value": {'basename': '99999999999999999999999999999998+99', 'location': 'keep:99999999999999999999999999999998+99', 'class': 'Directory'}},
                         'x': {"value": {
@@ -173,7 +197,7 @@ def stubs(func):
                                       'size': 0
                                   }
                               ]}},
-                        'cwl:tool': '3fffdeaa75e018172e1b583425f4ebff+60/workflow.cwl#main',
+                        'cwl:tool': '57ad063d64c60dbddc027791f0649211+60/workflow.cwl#main',
                         'arv:debug': True,
                         'arv:enable_reuse': True,
                         'arv:on_error': 'continue'
@@ -247,7 +271,7 @@ def stubs(func):
                         '--enable-reuse', '--debug', '--on-error=continue',
                         '/var/lib/cwl/workflow.json#main', '/var/lib/cwl/cwl.input.json'],
             'name': 'submit_wf.cwl',
-            'container_image': 'arvados/jobs:'+arvados_cwl.__version__,
+            'container_image': '999999999999999999999999999999d3+99',
             'output_path': '/var/spool/cwl',
             'cwd': '/var/spool/cwl',
             'runtime_constraints': {
@@ -277,10 +301,17 @@ def stubs(func):
 
 
 class TestSubmit(unittest.TestCase):
-    @mock.patch("arvados_cwl.runner.arv_docker_get_image")
+    @mock.patch("arvados_cwl.arvdocker.arv_docker_get_image")
     @mock.patch("time.sleep")
     @stubs
     def test_submit(self, stubs, tm, arvdock):
+        def get_image(api_client, dockerRequirement, pull_image, project_uuid):
+            if dockerRequirement["dockerPull"] == 'arvados/jobs:'+arvados_cwl.__version__:
+                return '999999999999999999999999999999d3+99'
+            elif dockerRequirement["dockerPull"] == "debian:8":
+                return '999999999999999999999999999999d4+99'
+        arvdock.side_effect = get_image
+
         capture_stdout = cStringIO.StringIO()
         exited = arvados_cwl.main(
             ["--submit", "--no-wait", "--api=jobs", "--debug",
@@ -303,13 +334,14 @@ class TestSubmit(unittest.TestCase):
             }), ensure_unique_name=False),
             mock.call(body=JsonDiffMatcher({
                 'manifest_text':
-                '. 61df2ed9ee3eb7dd9b799e5ca35305fa+1217 0:1217:workflow.cwl\n',
+                ". 68089141fbf7e020ac90a9d6a575bc8f+1312 0:1312:workflow.cwl\n",
                 'replication_desired': None,
                 'name': 'submit_wf.cwl',
             }), ensure_unique_name=True)        ])
 
         arvdock.assert_has_calls([
             mock.call(stubs.api, {"class": "DockerRequirement", "dockerPull": "debian:8"}, True, None),
+            mock.call(stubs.api, {"class": "DockerRequirement", "dockerPull": "debian:8", 'http://arvados.org/cwl#dockerCollectionPDH': '999999999999999999999999999999d4+99'}, True, None),
             mock.call(stubs.api, {'dockerPull': 'arvados/jobs:'+arvados_cwl.__version__}, True, None)
         ])
 
@@ -646,7 +678,7 @@ class TestSubmit(unittest.TestCase):
 
     @mock.patch("arvados_cwl.task_queue.TaskQueue")
     @mock.patch("arvados_cwl.arvworkflow.ArvadosWorkflow.job")
-    @mock.patch("arvados_cwl.ArvCwlRunner.make_output_collection", return_value = (None, None))
+    @mock.patch("arvados_cwl.executor.ArvCwlExecutor.make_output_collection", return_value = (None, None))
     @stubs
     def test_storage_classes_correctly_propagate_to_make_output_collection(self, stubs, make_output, job, tq):
         def set_final_output(job_order, output_callback, runtimeContext):
@@ -667,7 +699,7 @@ class TestSubmit(unittest.TestCase):
 
     @mock.patch("arvados_cwl.task_queue.TaskQueue")
     @mock.patch("arvados_cwl.arvworkflow.ArvadosWorkflow.job")
-    @mock.patch("arvados_cwl.ArvCwlRunner.make_output_collection", return_value = (None, None))
+    @mock.patch("arvados_cwl.executor.ArvCwlExecutor.make_output_collection", return_value = (None, None))
     @stubs
     def test_default_storage_classes_correctly_propagate_to_make_output_collection(self, stubs, make_output, job, tq):
         def set_final_output(job_order, output_callback, runtimeContext):
@@ -835,7 +867,7 @@ class TestSubmit(unittest.TestCase):
             }, 'state': 'Committed',
             'output_path': '/var/spool/cwl',
             'name': 'expect_arvworkflow.cwl#main',
-            'container_image': 'arvados/jobs:'+arvados_cwl.__version__,
+            'container_image': '999999999999999999999999999999d3+99',
             'command': ['arvados-cwl-runner', '--local', '--api=containers',
                         '--no-log-timestamps', '--disable-validate',
                         '--eval-timeout=20', '--thread-count=4',
@@ -934,7 +966,11 @@ class TestSubmit(unittest.TestCase):
                                         'id': '#submit_tool.cwl/x'}
                                 ],
                                 'requirements': [
-                                    {'dockerPull': 'debian:8', 'class': 'DockerRequirement'}
+                                    {
+                                        'dockerPull': 'debian:8',
+                                        'class': 'DockerRequirement',
+                                        "http://arvados.org/cwl#dockerCollectionPDH": "999999999999999999999999999999d4+99"
+                                    }
                                 ],
                                 'id': '#submit_tool.cwl',
                                 'outputs': [],
@@ -953,7 +989,7 @@ class TestSubmit(unittest.TestCase):
             }, 'state': 'Committed',
             'output_path': '/var/spool/cwl',
             'name': 'a test workflow',
-            'container_image': 'arvados/jobs:'+arvados_cwl.__version__,
+            'container_image': "999999999999999999999999999999d3+99",
             'command': ['arvados-cwl-runner', '--local', '--api=containers',
                         '--no-log-timestamps', '--disable-validate',
                         '--eval-timeout=20', '--thread-count=4',
@@ -1090,7 +1126,7 @@ class TestSubmit(unittest.TestCase):
         except:
             logging.exception("")
 
-        stubs.expect_pipeline_instance["components"]["cwl-runner"]["runtime_constraints"]["docker_image"] = "arvados/jobs:123"
+        stubs.expect_pipeline_instance["components"]["cwl-runner"]["runtime_constraints"]["docker_image"] = "999999999999999999999999999999d5+99"
 
         expect_pipeline = copy.deepcopy(stubs.expect_pipeline_instance)
         stubs.api.pipeline_instances().create.assert_called_with(
@@ -1110,7 +1146,7 @@ class TestSubmit(unittest.TestCase):
         except:
             logging.exception("")
 
-        stubs.expect_container_spec["container_image"] = "arvados/jobs:123"
+        stubs.expect_container_spec["container_image"] = "999999999999999999999999999999d5+99"
 
         expect_container = copy.deepcopy(stubs.expect_container_spec)
         stubs.api.container_requests().create.assert_called_with(
@@ -1179,33 +1215,38 @@ class TestSubmit(unittest.TestCase):
     @mock.patch("cwltool.docker.DockerCommandLineJob.get_image")
     @mock.patch("arvados.api")
     def test_arvados_jobs_image(self, api, get_image, find_one_image_hash):
-        arvrunner = mock.MagicMock()
-        arvrunner.project_uuid = ""
-        api.return_value = mock.MagicMock()
-        arvrunner.api = api.return_value
-        arvrunner.api.links().list().execute.side_effect = ({"items": [{"created_at": "",
-                                                                        "head_uuid": "zzzzz-4zz18-zzzzzzzzzzzzzzb",
-                                                                        "link_class": "docker_image_repo+tag",
-                                                                        "name": "arvados/jobs:"+arvados_cwl.__version__,
-                                                                        "owner_uuid": "",
-                                                                        "properties": {"image_timestamp": ""}}], "items_available": 1, "offset": 0},
-                                                            {"items": [{"created_at": "",
-                                                                        "head_uuid": "",
-                                                                        "link_class": "docker_image_hash",
-                                                                        "name": "123456",
-                                                                        "owner_uuid": "",
-                                                                        "properties": {"image_timestamp": ""}}], "items_available": 1, "offset": 0}
-        )
-        find_one_image_hash.return_value = "123456"
-
-        arvrunner.api.collections().list().execute.side_effect = ({"items": [{"uuid": "zzzzz-4zz18-zzzzzzzzzzzzzzb",
-                                                                              "owner_uuid": "",
-                                                                              "manifest_text": "",
-                                                                              "properties": ""
-                                                                          }], "items_available": 1, "offset": 0},)
-        arvrunner.api.collections().create().execute.return_value = {"uuid": ""}
-        self.assertEqual("arvados/jobs:"+arvados_cwl.__version__,
-                         arvados_cwl.runner.arvados_jobs_image(arvrunner, "arvados/jobs:"+arvados_cwl.__version__))
+        try:
+            arvrunner = mock.MagicMock()
+            arvrunner.project_uuid = ""
+            api.return_value = mock.MagicMock()
+            arvrunner.api = api.return_value
+            arvrunner.api.links().list().execute.side_effect = ({"items": [{"created_at": "",
+                                                                            "head_uuid": "zzzzz-4zz18-zzzzzzzzzzzzzzb",
+                                                                            "link_class": "docker_image_repo+tag",
+                                                                            "name": "arvados/jobs:"+arvados_cwl.__version__,
+                                                                            "owner_uuid": "",
+                                                                            "properties": {"image_timestamp": ""}}], "items_available": 1, "offset": 0},
+                                                                {"items": [{"created_at": "",
+                                                                            "head_uuid": "",
+                                                                            "link_class": "docker_image_hash",
+                                                                            "name": "123456",
+                                                                            "owner_uuid": "",
+                                                                            "properties": {"image_timestamp": ""}}], "items_available": 1, "offset": 0}
+            )
+            find_one_image_hash.return_value = "123456"
+
+            arvrunner.api.collections().list().execute.side_effect = ({"items": [{"uuid": "zzzzz-4zz18-zzzzzzzzzzzzzzb",
+                                                                                  "owner_uuid": "",
+                                                                                  "manifest_text": "",
+                                                                                  "properties": ""
+                                                                              }], "items_available": 1, "offset": 0},)
+            arvrunner.api.collections().create().execute.return_value = {"uuid": ""}
+            arvrunner.api.collections().get().execute.return_value = {"uuid": "zzzzz-4zz18-zzzzzzzzzzzzzzb",
+                                                                      "portable_data_hash": "9999999999999999999999999999999b+99"}
+            self.assertEqual("9999999999999999999999999999999b+99",
+                             arvados_cwl.runner.arvados_jobs_image(arvrunner, "arvados/jobs:"+arvados_cwl.__version__))
+        finally:
+            arvados_cwl.arvdocker.arv_docker_clear_cache()
 
     @stubs
     def test_submit_secrets(self, stubs):
@@ -1235,7 +1276,7 @@ class TestSubmit(unittest.TestCase):
                 "/var/lib/cwl/workflow.json#main",
                 "/var/lib/cwl/cwl.input.json"
             ],
-            "container_image": "arvados/jobs:"+arvados_cwl.__version__,
+            "container_image": "999999999999999999999999999999d3+99",
             "cwd": "/var/spool/cwl",
             "mounts": {
                 "/var/lib/cwl/cwl.input.json": {
@@ -1297,7 +1338,8 @@ class TestSubmit(unittest.TestCase):
                                 "hints": [
                                     {
                                         "class": "DockerRequirement",
-                                        "dockerPull": "debian:8"
+                                        "dockerPull": "debian:8",
+                                        "http://arvados.org/cwl#dockerCollectionPDH": "999999999999999999999999999999d4+99"
                                     },
                                     {
                                         "class": "http://commonwl.org/cwltool#Secrets",
@@ -1395,7 +1437,7 @@ class TestSubmit(unittest.TestCase):
             logging.exception("")
 
         stubs.api.container_requests().update.assert_called_with(
-            uuid="zzzzz-xvhdp-yyyyyyyyyyyyyyy", body=JsonDiffMatcher(stubs.expect_container_spec))
+            uuid="zzzzz-xvhdp-yyyyyyyyyyyyyyy", body=JsonDiffMatcher(stubs.expect_container_spec), cluster_id="zzzzz")
         self.assertEqual(capture_stdout.getvalue(),
                          stubs.expect_container_request_uuid + '\n')
 
diff --git a/sdk/cwl/tests/wf/submit_wf_packed.cwl b/sdk/cwl/tests/wf/submit_wf_packed.cwl
index 65704b4e5..83ba584b2 100644
--- a/sdk/cwl/tests/wf/submit_wf_packed.cwl
+++ b/sdk/cwl/tests/wf/submit_wf_packed.cwl
@@ -8,6 +8,7 @@ $graph:
   requirements:
   - class: DockerRequirement
     dockerPull: debian:8
+    'http://arvados.org/cwl#dockerCollectionPDH': 999999999999999999999999999999d4+99
   inputs:
   - id: '#submit_tool.cwl/x'
     type: File

commit 592f2cb6e0b25c53b5964619ca0a849dfc7de83d
Author: Peter Amstutz <pamstutz at veritasgenetics.com>
Date:   Thu Nov 1 14:42:12 2018 -0400

    14198: Add paging on container list, check for valid cluster id
    
    Arvados-DCO-1.1-Signed-off-by: Peter Amstutz <pamstutz at veritasgenetics.com>

diff --git a/sdk/cwl/arvados_cwl/arv-cwl-schema.yml b/sdk/cwl/arvados_cwl/arv-cwl-schema.yml
index 94eaf9560..902b1ffba 100644
--- a/sdk/cwl/arvados_cwl/arv-cwl-schema.yml
+++ b/sdk/cwl/arvados_cwl/arv-cwl-schema.yml
@@ -247,9 +247,9 @@ $graph:
       jsonldPredicate:
         _id: "@type"
         _type: "@vocab"
-    clusterID:
+    cluster_id:
       type: string?
       doc: The cluster to run the container
-    ownerUUID:
+    project_uuid:
       type: string?
       doc: The project that will own the container requests and intermediate collections
diff --git a/sdk/cwl/arvados_cwl/arvtool.py b/sdk/cwl/arvados_cwl/arvtool.py
index 83307d331..130b42b5c 100644
--- a/sdk/cwl/arvados_cwl/arvtool.py
+++ b/sdk/cwl/arvados_cwl/arvtool.py
@@ -8,6 +8,19 @@ from .arvcontainer import ArvadosContainer
 from .pathmapper import ArvPathMapper
 from .context import ClusterTarget
 from functools import partial
+from schema_salad.sourceline import SourceLine
+from cwltool.errors import WorkflowException
+
+def check_cluster_target(self, builder, runtimeContext):
+    cluster_target_req, _ = self.get_requirement("http://arvados.org/cwl#ClusterTarget")
+    if cluster_target_req and runtimeContext.cluster_target_id != id(cluster_target_req):
+        with SourceLine(cluster_target_req, None, WorkflowException, runtimeContext.debug):
+            runtimeContext.cluster_target_id = id(cluster_target_req)
+            runtimeContext.submit_runner_cluster = builder.do_eval(cluster_target_req.get("cluster_id")) or runtimeContext.submit_runner_cluster
+            runtimeContext.project_uuid = builder.do_eval(cluster_target_req.get("project_uuid")) or runtimeContext.project_uuid
+            if runtimeContext.submit_runner_cluster and runtimeContext.submit_runner_cluster not in self.arvrunner.api._rootDesc["remoteHosts"]:
+                raise WorkflowException("Unknown or invalid cluster id '%s' known clusters are %s" % (runtimeContext.submit_runner_cluster,
+                                                                                                      ", ".join(self.arvrunner.api._rootDesc["remoteHosts"].keys())))
 
 class ArvadosCommandTool(CommandLineTool):
     """Wrap cwltool CommandLineTool to override selected methods."""
@@ -45,11 +58,7 @@ class ArvadosCommandTool(CommandLineTool):
 
         runtimeContext = runtimeContext.copy()
 
-        cluster_target_req, _ = self.get_requirement("http://arvados.org/cwl#ClusterTarget")
-        if cluster_target_req and runtimeContext.cluster_target_id != id(cluster_target_req):
-            runtimeContext.cluster_target_id = id(cluster_target_req)
-            runtimeContext.submit_runner_cluster = builder.do_eval(cluster_target_req.get("clusterID")) or runtimeContext.submit_runner_cluster
-            runtimeContext.project_uuid = builder.do_eval(cluster_target_req.get("ownerUUID")) or runtimeContext.project_uuid
+        check_cluster_target(self, builder, runtimeContext)
 
         if runtimeContext.work_api == "containers":
             dockerReq, is_req = self.get_requirement("DockerRequirement")
diff --git a/sdk/cwl/arvados_cwl/arvworkflow.py b/sdk/cwl/arvados_cwl/arvworkflow.py
index 2f114f4ff..b689e94ef 100644
--- a/sdk/cwl/arvados_cwl/arvworkflow.py
+++ b/sdk/cwl/arvados_cwl/arvworkflow.py
@@ -132,11 +132,7 @@ class ArvadosWorkflow(Workflow):
 
     def job(self, joborder, output_callback, runtimeContext):
 
-        cluster_target_req, _ = self.get_requirement("http://arvados.org/cwl#ClusterTarget")
-        if cluster_target_req and runtimeContext.cluster_target_id != id(cluster_target_req):
-            runtimeContext.cluster_target_id = id(cluster_target_req)
-            runtimeContext.submit_runner_cluster = builder.do_eval(cluster_target_req.get("clusterID")) or runtimeContext.submit_runner_cluster
-            runtimeContext.project_uuid = builder.do_eval(cluster_target_req.get("ownerUUID")) or runtimeContext.project_uuid
+        check_cluster_target(self, self._init_job(joborder, runtimeContext), runtimeContext)
 
         req, _ = self.get_requirement("http://arvados.org/cwl#RunInSingleContainer")
         if not req:
diff --git a/sdk/cwl/arvados_cwl/executor.py b/sdk/cwl/arvados_cwl/executor.py
index bf81853be..8c2023e18 100644
--- a/sdk/cwl/arvados_cwl/executor.py
+++ b/sdk/cwl/arvados_cwl/executor.py
@@ -326,21 +326,26 @@ http://doc.arvados.org/install/install-api-server.html#disable_api_methods
                 elif self.work_api == "jobs":
                     table = self.poll_api.jobs()
 
-                try:
-                    proc_states = table.list(filters=[["uuid", "in", keys]]).execute(num_retries=self.num_retries)
-                except Exception as e:
-                    logger.warn("Error checking states on API server: %s", e)
-                    remain_wait = self.poll_interval
-                    continue
+                pageSize = self.poll_api._rootDesc.get('maxItemsPerResponse', 1000)
 
-                for p in proc_states["items"]:
-                    self.on_message({
-                        "object_uuid": p["uuid"],
-                        "event_type": "update",
-                        "properties": {
-                            "new_attributes": p
-                        }
-                    })
+                while keys:
+                    page = keys[:pageSize]
+                    keys = keys[pageSize:]
+                    try:
+                        proc_states = table.list(filters=[["uuid", "in", page]]).execute(num_retries=self.num_retries)
+                    except Exception as e:
+                        logger.warn("Error checking states on API server: %s", e)
+                        remain_wait = self.poll_interval
+                        continue
+
+                    for p in proc_states["items"]:
+                        self.on_message({
+                            "object_uuid": p["uuid"],
+                            "event_type": "update",
+                            "properties": {
+                                "new_attributes": p
+                            }
+                        })
                 finish_poll = time.time()
                 remain_wait = self.poll_interval - (finish_poll - begin_poll)
         except:
@@ -631,17 +636,17 @@ http://doc.arvados.org/install/install-api-server.html#disable_api_methods
 
         self.task_queue = TaskQueue(self.workflow_eval_lock, self.thread_count)
 
-        if runnerjob:
-            jobiter = iter((runnerjob,))
-        else:
-            if runtimeContext.cwl_runner_job is not None:
-                self.uuid = runtimeContext.cwl_runner_job.get('uuid')
-            jobiter = tool.job(job_order,
-                               self.output_callback,
-                               runtimeContext)
-
         try:
             self.workflow_eval_lock.acquire()
+            if runnerjob:
+                jobiter = iter((runnerjob,))
+            else:
+                if runtimeContext.cwl_runner_job is not None:
+                    self.uuid = runtimeContext.cwl_runner_job.get('uuid')
+                jobiter = tool.job(job_order,
+                                   self.output_callback,
+                                   runtimeContext)
+
             # Holds the lock while this code runs and releases it when
             # it is safe to do so in self.workflow_eval_lock.wait(),
             # at which point on_message can update job state and
@@ -681,7 +686,7 @@ http://doc.arvados.org/install/install-api-server.html#disable_api_methods
             if sys.exc_info()[0] is KeyboardInterrupt or sys.exc_info()[0] is SystemExit:
                 logger.error("Interrupted, workflow will be cancelled")
             else:
-                logger.error("Execution failed: %s", sys.exc_info()[1], exc_info=(sys.exc_info()[1] if self.debug else False))
+                logger.error("Execution failed:\n%s", sys.exc_info()[1], exc_info=(sys.exc_info()[1] if self.debug else False))
             if self.pipeline:
                 self.api.pipeline_instances().update(uuid=self.pipeline["uuid"],
                                                      body={"state": "Failed"}).execute(num_retries=self.num_retries)
diff --git a/services/api/app/controllers/arvados/v1/schema_controller.rb b/services/api/app/controllers/arvados/v1/schema_controller.rb
index 2d0bc114f..771ef2b1f 100644
--- a/services/api/app/controllers/arvados/v1/schema_controller.rb
+++ b/services/api/app/controllers/arvados/v1/schema_controller.rb
@@ -50,6 +50,7 @@ class Arvados::V1::SchemaController < ApplicationController
         defaultTrashLifetime: Rails.application.config.default_trash_lifetime,
         blobSignatureTtl: Rails.application.config.blob_signature_ttl,
         maxRequestSize: Rails.application.config.max_request_size,
+        maxItemsPerResponse: Rails.application.config.max_items_per_response,
         dockerImageFormats: Rails.application.config.docker_image_formats,
         crunchLogBytesPerEvent: Rails.application.config.crunch_log_bytes_per_event,
         crunchLogSecondsBetweenEvents: Rails.application.config.crunch_log_seconds_between_events,

commit 469bc1ef73d15fd7471b59c2f646961ec0b90fe4
Author: Peter Amstutz <pamstutz at veritasgenetics.com>
Date:   Wed Oct 31 13:25:24 2018 -0400

    14198: Use ArvRuntimeContext.submit_runner_cluster for target cluster
    
    Arvados-DCO-1.1-Signed-off-by: Peter Amstutz <pamstutz at veritasgenetics.com>

diff --git a/sdk/cwl/arvados_cwl/arvcontainer.py b/sdk/cwl/arvados_cwl/arvcontainer.py
index 823b41ce9..100329b69 100644
--- a/sdk/cwl/arvados_cwl/arvcontainer.py
+++ b/sdk/cwl/arvados_cwl/arvcontainer.py
@@ -36,7 +36,7 @@ metrics = logging.getLogger('arvados.cwl-runner.metrics')
 class ArvadosContainer(JobBase):
     """Submit and manage a Crunch container request for executing a CWL CommandLineTool."""
 
-    def __init__(self, runner, cluster_target,
+    def __init__(self, runner, job_runtime,
                  builder,   # type: Builder
                  joborder,  # type: Dict[Text, Union[Dict[Text, Any], List, Text]]
                  make_path_mapper,  # type: Callable[..., PathMapper]
@@ -46,7 +46,7 @@ class ArvadosContainer(JobBase):
     ):
         super(ArvadosContainer, self).__init__(builder, joborder, make_path_mapper, requirements, hints, name)
         self.arvrunner = runner
-        self.cluster_target = cluster_target
+        self.job_runtime = job_runtime
         self.running = False
         self.uuid = None
 
@@ -61,6 +61,8 @@ class ArvadosContainer(JobBase):
         # ArvadosContainer object by CommandLineTool.job() before
         # run() is called.
 
+        runtimeContext = self.job_runtime
+
         container_request = {
             "command": self.command_line,
             "name": self.name,
@@ -252,11 +254,8 @@ class ArvadosContainer(JobBase):
             scheduling_parameters["max_run_time"] = self.timelimit
 
         extra_submit_params = {}
-        if self.cluster_target is not None:
-            if self.cluster_target.cluster_id:
-                extra_submit_params["cluster_id"] = self.cluster_target.cluster_id
-            if self.cluster_target.owner_uuid:
-                container_request["owner_uuid"] = self.cluster_target.owner_uuid
+        if runtimeContext.submit_runner_cluster:
+            extra_submit_params["cluster_id"] = runtimeContext.submit_runner_cluster
 
         container_request["output_name"] = "Output for step %s" % (self.name)
         container_request["output_ttl"] = self.output_ttl
diff --git a/sdk/cwl/arvados_cwl/arvtool.py b/sdk/cwl/arvados_cwl/arvtool.py
index e0997db5b..83307d331 100644
--- a/sdk/cwl/arvados_cwl/arvtool.py
+++ b/sdk/cwl/arvados_cwl/arvtool.py
@@ -18,7 +18,7 @@ class ArvadosCommandTool(CommandLineTool):
 
     def make_job_runner(self, runtimeContext):
         if runtimeContext.work_api == "containers":
-            return partial(ArvadosContainer, self.arvrunner, runtimeContext.cluster_target)
+            return partial(ArvadosContainer, self.arvrunner, runtimeContext)
         elif runtimeContext.work_api == "jobs":
             return partial(ArvadosJob, self.arvrunner)
         else:
@@ -46,10 +46,10 @@ class ArvadosCommandTool(CommandLineTool):
         runtimeContext = runtimeContext.copy()
 
         cluster_target_req, _ = self.get_requirement("http://arvados.org/cwl#ClusterTarget")
-        if runtimeContext.cluster_target is None or runtimeContext.cluster_target.instance != id(cluster_target_req):
-            runtimeContext.cluster_target = ClusterTarget(id(cluster_target_req),
-                                                          builder.do_eval(cluster_target_req.get("clusterID")),
-                                                          builder.do_eval(cluster_target_req.get("ownerUUID")))
+        if cluster_target_req and runtimeContext.cluster_target_id != id(cluster_target_req):
+            runtimeContext.cluster_target_id = id(cluster_target_req)
+            runtimeContext.submit_runner_cluster = builder.do_eval(cluster_target_req.get("clusterID")) or runtimeContext.submit_runner_cluster
+            runtimeContext.project_uuid = builder.do_eval(cluster_target_req.get("ownerUUID")) or runtimeContext.project_uuid
 
         if runtimeContext.work_api == "containers":
             dockerReq, is_req = self.get_requirement("DockerRequirement")
diff --git a/sdk/cwl/arvados_cwl/arvworkflow.py b/sdk/cwl/arvados_cwl/arvworkflow.py
index f86641bfd..2f114f4ff 100644
--- a/sdk/cwl/arvados_cwl/arvworkflow.py
+++ b/sdk/cwl/arvados_cwl/arvworkflow.py
@@ -133,10 +133,10 @@ class ArvadosWorkflow(Workflow):
     def job(self, joborder, output_callback, runtimeContext):
 
         cluster_target_req, _ = self.get_requirement("http://arvados.org/cwl#ClusterTarget")
-        if runtimeContext.cluster_target is None or runtimeContext.cluster_target.instance != id(cluster_target_req):
-            runtimeContext.cluster_target = ClusterTarget(id(cluster_target_req),
-                                                          builder.do_eval(cluster_target_req.get("clusterID")),
-                                                          builder.do_eval(cluster_target_req.get("ownerUUID")))
+        if cluster_target_req and runtimeContext.cluster_target_id != id(cluster_target_req):
+            runtimeContext.cluster_target_id = id(cluster_target_req)
+            runtimeContext.submit_runner_cluster = builder.do_eval(cluster_target_req.get("clusterID")) or runtimeContext.submit_runner_cluster
+            runtimeContext.project_uuid = builder.do_eval(cluster_target_req.get("ownerUUID")) or runtimeContext.project_uuid
 
         req, _ = self.get_requirement("http://arvados.org/cwl#RunInSingleContainer")
         if not req:
diff --git a/sdk/cwl/arvados_cwl/context.py b/sdk/cwl/arvados_cwl/context.py
index 23e7b91a0..48f92b77f 100644
--- a/sdk/cwl/arvados_cwl/context.py
+++ b/sdk/cwl/arvados_cwl/context.py
@@ -34,7 +34,7 @@ class ArvRuntimeContext(RuntimeContext):
         self.current_container = None
         self.http_timeout = 300
         self.submit_runner_cluster = None
-        self.cluster_target = None
+        self.cluster_target_id = 0
 
         super(ArvRuntimeContext, self).__init__(kwargs)
 

commit c9e1da1e01a91ddcf18dedef7eca4a79c0f83549
Author: Peter Amstutz <pamstutz at veritasgenetics.com>
Date:   Thu Oct 25 17:21:05 2018 -0400

    14198: Fix typo current -> current_container, add copyright header
    
    Arvados-DCO-1.1-Signed-off-by: Peter Amstutz <pamstutz at veritasgenetics.com>

diff --git a/sdk/cwl/arvados_cwl/executor.py b/sdk/cwl/arvados_cwl/executor.py
index 7256e1d0d..bf81853be 100644
--- a/sdk/cwl/arvados_cwl/executor.py
+++ b/sdk/cwl/arvados_cwl/executor.py
@@ -1,3 +1,7 @@
+# Copyright (C) The Arvados Authors. All rights reserved.
+#
+# SPDX-License-Identifier: Apache-2.0
+
 import argparse
 import logging
 import os
@@ -618,7 +622,7 @@ http://doc.arvados.org/install/install-api-server.html#disable_api_methods
             return (runnerjob.uuid, "success")
 
         current_container = get_current_container(self.api, self.num_retries, logger)
-        if current:
+        if current_container:
             logger.info("Running inside container %s", current_container.get("uuid"))
 
         self.poll_api = arvados.api('v1', timeout=runtimeContext.http_timeout)

commit 16ec09d674d2c9a8f0e2abcc12a98ce7780a45a8
Author: Peter Amstutz <pamstutz at veritasgenetics.com>
Date:   Thu Oct 25 17:11:59 2018 -0400

    14198: Log current container
    
    Arvados-DCO-1.1-Signed-off-by: Peter Amstutz <pamstutz at veritasgenetics.com>

diff --git a/sdk/cwl/arvados_cwl/executor.py b/sdk/cwl/arvados_cwl/executor.py
index 6eaa4b92c..7256e1d0d 100644
--- a/sdk/cwl/arvados_cwl/executor.py
+++ b/sdk/cwl/arvados_cwl/executor.py
@@ -617,6 +617,10 @@ http://doc.arvados.org/install/install-api-server.html#disable_api_methods
             runnerjob.run(submitargs)
             return (runnerjob.uuid, "success")
 
+        current_container = get_current_container(self.api, self.num_retries, logger)
+        if current:
+            logger.info("Running inside container %s", current_container.get("uuid"))
+
         self.poll_api = arvados.api('v1', timeout=runtimeContext.http_timeout)
         self.polling_thread = threading.Thread(target=self.poll_states)
         self.polling_thread.start()

commit 07024cef444593d02fa98929ec5a8465d858652b
Author: Peter Amstutz <pamstutz at veritasgenetics.com>
Date:   Thu Oct 25 16:14:50 2018 -0400

    14198: Support expressions in TargetCluster[clusterID, ownerUUID]
    
    Arvados-DCO-1.1-Signed-off-by: Peter Amstutz <pamstutz at veritasgenetics.com>

diff --git a/sdk/cwl/arvados_cwl/arvcontainer.py b/sdk/cwl/arvados_cwl/arvcontainer.py
index d9466a83a..823b41ce9 100644
--- a/sdk/cwl/arvados_cwl/arvcontainer.py
+++ b/sdk/cwl/arvados_cwl/arvcontainer.py
@@ -36,7 +36,7 @@ metrics = logging.getLogger('arvados.cwl-runner.metrics')
 class ArvadosContainer(JobBase):
     """Submit and manage a Crunch container request for executing a CWL CommandLineTool."""
 
-    def __init__(self, runner,
+    def __init__(self, runner, cluster_target,
                  builder,   # type: Builder
                  joborder,  # type: Dict[Text, Union[Dict[Text, Any], List, Text]]
                  make_path_mapper,  # type: Callable[..., PathMapper]
@@ -46,6 +46,7 @@ class ArvadosContainer(JobBase):
     ):
         super(ArvadosContainer, self).__init__(builder, joborder, make_path_mapper, requirements, hints, name)
         self.arvrunner = runner
+        self.cluster_target = cluster_target
         self.running = False
         self.uuid = None
 
@@ -251,13 +252,11 @@ class ArvadosContainer(JobBase):
             scheduling_parameters["max_run_time"] = self.timelimit
 
         extra_submit_params = {}
-        cluster_target_req, _ = self.get_requirement("http://arvados.org/cwl#ClusterTarget")
-        if cluster_target_req:
-            cluster_id = cluster_target_req.get("clusterID")
-            if cluster_id:
-                extra_submit_params["cluster_id"] = cluster_id
-            if cluster_target_req.get("ownerUUID"):
-                container_request["owner_uuid"] = cluster_target_req.get("ownerUUID")
+        if self.cluster_target is not None:
+            if self.cluster_target.cluster_id:
+                extra_submit_params["cluster_id"] = self.cluster_target.cluster_id
+            if self.cluster_target.owner_uuid:
+                container_request["owner_uuid"] = self.cluster_target.owner_uuid
 
         container_request["output_name"] = "Output for step %s" % (self.name)
         container_request["output_ttl"] = self.output_ttl
diff --git a/sdk/cwl/arvados_cwl/arvtool.py b/sdk/cwl/arvados_cwl/arvtool.py
index 119acc303..e0997db5b 100644
--- a/sdk/cwl/arvados_cwl/arvtool.py
+++ b/sdk/cwl/arvados_cwl/arvtool.py
@@ -6,6 +6,7 @@ from cwltool.command_line_tool import CommandLineTool
 from .arvjob import ArvadosJob
 from .arvcontainer import ArvadosContainer
 from .pathmapper import ArvPathMapper
+from .context import ClusterTarget
 from functools import partial
 
 class ArvadosCommandTool(CommandLineTool):
@@ -17,7 +18,7 @@ class ArvadosCommandTool(CommandLineTool):
 
     def make_job_runner(self, runtimeContext):
         if runtimeContext.work_api == "containers":
-            return partial(ArvadosContainer, self.arvrunner)
+            return partial(ArvadosContainer, self.arvrunner, runtimeContext.cluster_target)
         elif runtimeContext.work_api == "jobs":
             return partial(ArvadosJob, self.arvrunner)
         else:
@@ -44,6 +45,12 @@ class ArvadosCommandTool(CommandLineTool):
 
         runtimeContext = runtimeContext.copy()
 
+        cluster_target_req, _ = self.get_requirement("http://arvados.org/cwl#ClusterTarget")
+        if runtimeContext.cluster_target is None or runtimeContext.cluster_target.instance != id(cluster_target_req):
+            runtimeContext.cluster_target = ClusterTarget(id(cluster_target_req),
+                                                          builder.do_eval(cluster_target_req.get("clusterID")),
+                                                          builder.do_eval(cluster_target_req.get("ownerUUID")))
+
         if runtimeContext.work_api == "containers":
             dockerReq, is_req = self.get_requirement("DockerRequirement")
             if dockerReq and dockerReq.get("dockerOutputDirectory"):
diff --git a/sdk/cwl/arvados_cwl/arvworkflow.py b/sdk/cwl/arvados_cwl/arvworkflow.py
index ae9062510..f86641bfd 100644
--- a/sdk/cwl/arvados_cwl/arvworkflow.py
+++ b/sdk/cwl/arvados_cwl/arvworkflow.py
@@ -131,158 +131,167 @@ class ArvadosWorkflow(Workflow):
         self.loadingContext = loadingContext
 
     def job(self, joborder, output_callback, runtimeContext):
+
+        cluster_target_req, _ = self.get_requirement("http://arvados.org/cwl#ClusterTarget")
+        if runtimeContext.cluster_target is None or runtimeContext.cluster_target.instance != id(cluster_target_req):
+            runtimeContext.cluster_target = ClusterTarget(id(cluster_target_req),
+                                                          builder.do_eval(cluster_target_req.get("clusterID")),
+                                                          builder.do_eval(cluster_target_req.get("ownerUUID")))
+
         req, _ = self.get_requirement("http://arvados.org/cwl#RunInSingleContainer")
-        if req:
-            with SourceLine(self.tool, None, WorkflowException, logger.isEnabledFor(logging.DEBUG)):
-                if "id" not in self.tool:
-                    raise WorkflowException("%s object must have 'id'" % (self.tool["class"]))
-            document_loader, workflowobj, uri = (self.doc_loader, self.doc_loader.fetch(self.tool["id"]), self.tool["id"])
+        if not req:
+            return super(ArvadosWorkflow, self).job(joborder, output_callback, runtimeContext)
 
-            discover_secondary_files(self.tool["inputs"], joborder)
+        # RunInSingleContainer is true
 
-            with Perf(metrics, "subworkflow upload_deps"):
-                upload_dependencies(self.arvrunner,
-                                    os.path.basename(joborder.get("id", "#")),
-                                    document_loader,
-                                    joborder,
-                                    joborder.get("id", "#"),
-                                    False)
+        with SourceLine(self.tool, None, WorkflowException, logger.isEnabledFor(logging.DEBUG)):
+            if "id" not in self.tool:
+                raise WorkflowException("%s object must have 'id'" % (self.tool["class"]))
+        document_loader, workflowobj, uri = (self.doc_loader, self.doc_loader.fetch(self.tool["id"]), self.tool["id"])
+
+        discover_secondary_files(self.tool["inputs"], joborder)
+
+        with Perf(metrics, "subworkflow upload_deps"):
+            upload_dependencies(self.arvrunner,
+                                os.path.basename(joborder.get("id", "#")),
+                                document_loader,
+                                joborder,
+                                joborder.get("id", "#"),
+                                False)
+
+            if self.wf_pdh is None:
+                workflowobj["requirements"] = dedup_reqs(self.requirements)
+                workflowobj["hints"] = dedup_reqs(self.hints)
+
+                packed = pack(document_loader, workflowobj, uri, self.metadata)
 
-                if self.wf_pdh is None:
-                    workflowobj["requirements"] = dedup_reqs(self.requirements)
-                    workflowobj["hints"] = dedup_reqs(self.hints)
-
-                    packed = pack(document_loader, workflowobj, uri, self.metadata)
-
-                    builder = Builder(joborder,
-                                      requirements=workflowobj["requirements"],
-                                      hints=workflowobj["hints"],
-                                      resources={})
-
-                    def visit(item):
-                        for t in ("hints", "requirements"):
-                            if t not in item:
-                                continue
-                            for req in item[t]:
-                                if req["class"] == "ResourceRequirement":
-                                    dyn = False
-                                    for k in max_res_pars + sum_res_pars:
-                                        if k in req:
-                                            if isinstance(req[k], basestring):
-                                                if item["id"] == "#main":
-                                                    # only the top-level requirements/hints may contain expressions
-                                                    self.dynamic_resource_req.append(req)
-                                                    dyn = True
-                                                    break
-                                                else:
-                                                    with SourceLine(req, k, WorkflowException):
-                                                        raise WorkflowException("Non-top-level ResourceRequirement in single container cannot have expressions")
-                                    if not dyn:
-                                        self.static_resource_req.append(req)
-
-                    visit_class(packed["$graph"], ("Workflow", "CommandLineTool"), visit)
-
-                    if self.static_resource_req:
-                        self.static_resource_req = [get_overall_res_req(self.static_resource_req)]
-
-                    upload_dependencies(self.arvrunner,
-                                        runtimeContext.name,
-                                        document_loader,
-                                        packed,
-                                        uri,
-                                        False)
-
-                    # Discover files/directories referenced by the
-                    # workflow (mainly "default" values)
-                    visit_class(packed, ("File", "Directory"), self.wf_reffiles.append)
-
-
-            if self.dynamic_resource_req:
                 builder = Builder(joborder,
-                                  requirements=self.requirements,
-                                  hints=self.hints,
+                                  requirements=workflowobj["requirements"],
+                                  hints=workflowobj["hints"],
                                   resources={})
 
-                # Evaluate dynamic resource requirements using current builder
-                rs = copy.copy(self.static_resource_req)
-                for dyn_rs in self.dynamic_resource_req:
-                    eval_req = {"class": "ResourceRequirement"}
-                    for a in max_res_pars + sum_res_pars:
-                        if a in dyn_rs:
-                            eval_req[a] = builder.do_eval(dyn_rs[a])
-                    rs.append(eval_req)
-                job_res_reqs = [get_overall_res_req(rs)]
-            else:
-                job_res_reqs = self.static_resource_req
-
-            with Perf(metrics, "subworkflow adjust"):
-                joborder_resolved = copy.deepcopy(joborder)
-                joborder_keepmount = copy.deepcopy(joborder)
-
-                reffiles = []
-                visit_class(joborder_keepmount, ("File", "Directory"), reffiles.append)
-
-                mapper = ArvPathMapper(self.arvrunner, reffiles+self.wf_reffiles, runtimeContext.basedir,
-                                       "/keep/%s",
-                                       "/keep/%s/%s")
-
-                # For containers API, we need to make sure any extra
-                # referenced files (ie referenced by the workflow but
-                # not in the inputs) are included in the mounts.
-                if self.wf_reffiles:
-                    runtimeContext = runtimeContext.copy()
-                    runtimeContext.extra_reffiles = copy.deepcopy(self.wf_reffiles)
-
-                def keepmount(obj):
-                    remove_redundant_fields(obj)
-                    with SourceLine(obj, None, WorkflowException, logger.isEnabledFor(logging.DEBUG)):
-                        if "location" not in obj:
-                            raise WorkflowException("%s object is missing required 'location' field: %s" % (obj["class"], obj))
-                    with SourceLine(obj, "location", WorkflowException, logger.isEnabledFor(logging.DEBUG)):
-                        if obj["location"].startswith("keep:"):
-                            obj["location"] = mapper.mapper(obj["location"]).target
-                            if "listing" in obj:
-                                del obj["listing"]
-                        elif obj["location"].startswith("_:"):
-                            del obj["location"]
-                        else:
-                            raise WorkflowException("Location is not a keep reference or a literal: '%s'" % obj["location"])
-
-                visit_class(joborder_keepmount, ("File", "Directory"), keepmount)
-
-                def resolved(obj):
-                    if obj["location"].startswith("keep:"):
-                        obj["location"] = mapper.mapper(obj["location"]).resolved
-
-                visit_class(joborder_resolved, ("File", "Directory"), resolved)
-
-                if self.wf_pdh is None:
-                    adjustFileObjs(packed, keepmount)
-                    adjustDirObjs(packed, keepmount)
-                    self.wf_pdh = upload_workflow_collection(self.arvrunner, shortname(self.tool["id"]), packed)
-
-            wf_runner = cmap({
-                "class": "CommandLineTool",
-                "baseCommand": "cwltool",
-                "inputs": self.tool["inputs"],
-                "outputs": self.tool["outputs"],
-                "stdout": "cwl.output.json",
-                "requirements": self.requirements+job_res_reqs+[
-                    {"class": "InlineJavascriptRequirement"},
-                    {
-                    "class": "InitialWorkDirRequirement",
-                    "listing": [{
-                            "entryname": "workflow.cwl",
-                            "entry": '$({"class": "File", "location": "keep:%s/workflow.cwl"})' % self.wf_pdh
-                        }, {
-                            "entryname": "cwl.input.yml",
-                            "entry": json.dumps(joborder_keepmount, indent=2, sort_keys=True, separators=(',',': ')).replace("\\", "\\\\").replace('$(', '\$(').replace('${', '\${')
-                        }]
-                }],
-                "hints": self.hints,
-                "arguments": ["--no-container", "--move-outputs", "--preserve-entire-environment", "workflow.cwl#main", "cwl.input.yml"],
-                "id": "#"
-            })
-            return ArvadosCommandTool(self.arvrunner, wf_runner, self.loadingContext).job(joborder_resolved, output_callback, runtimeContext)
+                def visit(item):
+                    for t in ("hints", "requirements"):
+                        if t not in item:
+                            continue
+                        for req in item[t]:
+                            if req["class"] == "ResourceRequirement":
+                                dyn = False
+                                for k in max_res_pars + sum_res_pars:
+                                    if k in req:
+                                        if isinstance(req[k], basestring):
+                                            if item["id"] == "#main":
+                                                # only the top-level requirements/hints may contain expressions
+                                                self.dynamic_resource_req.append(req)
+                                                dyn = True
+                                                break
+                                            else:
+                                                with SourceLine(req, k, WorkflowException):
+                                                    raise WorkflowException("Non-top-level ResourceRequirement in single container cannot have expressions")
+                                if not dyn:
+                                    self.static_resource_req.append(req)
+
+                visit_class(packed["$graph"], ("Workflow", "CommandLineTool"), visit)
+
+                if self.static_resource_req:
+                    self.static_resource_req = [get_overall_res_req(self.static_resource_req)]
+
+                upload_dependencies(self.arvrunner,
+                                    runtimeContext.name,
+                                    document_loader,
+                                    packed,
+                                    uri,
+                                    False)
+
+                # Discover files/directories referenced by the
+                # workflow (mainly "default" values)
+                visit_class(packed, ("File", "Directory"), self.wf_reffiles.append)
+
+
+        if self.dynamic_resource_req:
+            builder = Builder(joborder,
+                              requirements=self.requirements,
+                              hints=self.hints,
+                              resources={})
+
+            # Evaluate dynamic resource requirements using current builder
+            rs = copy.copy(self.static_resource_req)
+            for dyn_rs in self.dynamic_resource_req:
+                eval_req = {"class": "ResourceRequirement"}
+                for a in max_res_pars + sum_res_pars:
+                    if a in dyn_rs:
+                        eval_req[a] = builder.do_eval(dyn_rs[a])
+                rs.append(eval_req)
+            job_res_reqs = [get_overall_res_req(rs)]
         else:
-            return super(ArvadosWorkflow, self).job(joborder, output_callback, runtimeContext)
+            job_res_reqs = self.static_resource_req
+
+        with Perf(metrics, "subworkflow adjust"):
+            joborder_resolved = copy.deepcopy(joborder)
+            joborder_keepmount = copy.deepcopy(joborder)
+
+            reffiles = []
+            visit_class(joborder_keepmount, ("File", "Directory"), reffiles.append)
+
+            mapper = ArvPathMapper(self.arvrunner, reffiles+self.wf_reffiles, runtimeContext.basedir,
+                                   "/keep/%s",
+                                   "/keep/%s/%s")
+
+            # For containers API, we need to make sure any extra
+            # referenced files (ie referenced by the workflow but
+            # not in the inputs) are included in the mounts.
+            if self.wf_reffiles:
+                runtimeContext = runtimeContext.copy()
+                runtimeContext.extra_reffiles = copy.deepcopy(self.wf_reffiles)
+
+            def keepmount(obj):
+                remove_redundant_fields(obj)
+                with SourceLine(obj, None, WorkflowException, logger.isEnabledFor(logging.DEBUG)):
+                    if "location" not in obj:
+                        raise WorkflowException("%s object is missing required 'location' field: %s" % (obj["class"], obj))
+                with SourceLine(obj, "location", WorkflowException, logger.isEnabledFor(logging.DEBUG)):
+                    if obj["location"].startswith("keep:"):
+                        obj["location"] = mapper.mapper(obj["location"]).target
+                        if "listing" in obj:
+                            del obj["listing"]
+                    elif obj["location"].startswith("_:"):
+                        del obj["location"]
+                    else:
+                        raise WorkflowException("Location is not a keep reference or a literal: '%s'" % obj["location"])
+
+            visit_class(joborder_keepmount, ("File", "Directory"), keepmount)
+
+            def resolved(obj):
+                if obj["location"].startswith("keep:"):
+                    obj["location"] = mapper.mapper(obj["location"]).resolved
+
+            visit_class(joborder_resolved, ("File", "Directory"), resolved)
+
+            if self.wf_pdh is None:
+                adjustFileObjs(packed, keepmount)
+                adjustDirObjs(packed, keepmount)
+                self.wf_pdh = upload_workflow_collection(self.arvrunner, shortname(self.tool["id"]), packed)
+
+        wf_runner = cmap({
+            "class": "CommandLineTool",
+            "baseCommand": "cwltool",
+            "inputs": self.tool["inputs"],
+            "outputs": self.tool["outputs"],
+            "stdout": "cwl.output.json",
+            "requirements": self.requirements+job_res_reqs+[
+                {"class": "InlineJavascriptRequirement"},
+                {
+                "class": "InitialWorkDirRequirement",
+                "listing": [{
+                        "entryname": "workflow.cwl",
+                        "entry": '$({"class": "File", "location": "keep:%s/workflow.cwl"})' % self.wf_pdh
+                    }, {
+                        "entryname": "cwl.input.yml",
+                        "entry": json.dumps(joborder_keepmount, indent=2, sort_keys=True, separators=(',',': ')).replace("\\", "\\\\").replace('$(', '\$(').replace('${', '\${')
+                    }]
+            }],
+            "hints": self.hints,
+            "arguments": ["--no-container", "--move-outputs", "--preserve-entire-environment", "workflow.cwl#main", "cwl.input.yml"],
+            "id": "#"
+        })
+        return ArvadosCommandTool(self.arvrunner, wf_runner, self.loadingContext).job(joborder_resolved, output_callback, runtimeContext)
diff --git a/sdk/cwl/arvados_cwl/context.py b/sdk/cwl/arvados_cwl/context.py
index 4e1334c1c..23e7b91a0 100644
--- a/sdk/cwl/arvados_cwl/context.py
+++ b/sdk/cwl/arvados_cwl/context.py
@@ -3,11 +3,14 @@
 # SPDX-License-Identifier: Apache-2.0
 
 from cwltool.context import LoadingContext, RuntimeContext
+from collections import namedtuple
 
 class ArvLoadingContext(LoadingContext):
     def __init__(self, kwargs=None):
         super(ArvLoadingContext, self).__init__(kwargs)
 
+ClusterTarget = namedtuple("ClusterTarget", ("instance", "cluster_id", "owner_uuid"))
+
 class ArvRuntimeContext(RuntimeContext):
     def __init__(self, kwargs=None):
         self.work_api = None
@@ -31,6 +34,7 @@ class ArvRuntimeContext(RuntimeContext):
         self.current_container = None
         self.http_timeout = 300
         self.submit_runner_cluster = None
+        self.cluster_target = None
 
         super(ArvRuntimeContext, self).__init__(kwargs)
 

commit 78c8a0007a6b51f8a8395e00fd183846fc311fc0
Author: Peter Amstutz <pamstutz at veritasgenetics.com>
Date:   Thu Oct 25 15:19:05 2018 -0400

    14198: Resolve to Docker images to PDH and set "http://arvados.org/cwl#dockerCollectionPDH"
    
    Arvados-DCO-1.1-Signed-off-by: Peter Amstutz <pamstutz at veritasgenetics.com>

diff --git a/sdk/cwl/arvados_cwl/arvcontainer.py b/sdk/cwl/arvados_cwl/arvcontainer.py
index 7e22a7d39..d9466a83a 100644
--- a/sdk/cwl/arvados_cwl/arvcontainer.py
+++ b/sdk/cwl/arvados_cwl/arvcontainer.py
@@ -214,8 +214,7 @@ class ArvadosContainer(JobBase):
         container_request["container_image"] = arv_docker_get_image(self.arvrunner.api,
                                                                     docker_req,
                                                                     runtimeContext.pull_image,
-                                                                    self.arvrunner.project_uuid,
-                                                                    runtimeContext.submit_runner_cluster)
+                                                                    self.arvrunner.project_uuid)
 
         api_req, _ = self.get_requirement("http://arvados.org/cwl#APIRequirement")
         if api_req:
diff --git a/sdk/cwl/arvados_cwl/arvdocker.py b/sdk/cwl/arvados_cwl/arvdocker.py
index 6bca07c88..84006b47d 100644
--- a/sdk/cwl/arvados_cwl/arvdocker.py
+++ b/sdk/cwl/arvados_cwl/arvdocker.py
@@ -21,6 +21,9 @@ cached_lookups_lock = threading.Lock()
 def arv_docker_get_image(api_client, dockerRequirement, pull_image, project_uuid):
     """Check if a Docker image is available in Keep, if not, upload it using arv-keepdocker."""
 
+    if "http://arvados.org/cwl#dockerCollectionPDH" in dockerRequirement:
+        return dockerRequirement["http://arvados.org/cwl#dockerCollectionPDH"]
+
     if "dockerImageId" not in dockerRequirement and "dockerPull" in dockerRequirement:
         dockerRequirement = copy.deepcopy(dockerRequirement)
         dockerRequirement["dockerImageId"] = dockerRequirement["dockerPull"]
diff --git a/sdk/cwl/arvados_cwl/executor.py b/sdk/cwl/arvados_cwl/executor.py
index bbfb8ffc6..6eaa4b92c 100644
--- a/sdk/cwl/arvados_cwl/executor.py
+++ b/sdk/cwl/arvados_cwl/executor.py
@@ -37,6 +37,7 @@ from cwltool.pathmapper import adjustFileObjs, adjustDirObjs, get_listing
 from cwltool.command_line_tool import compute_checksums
 
 logger = logging.getLogger('arvados.cwl-runner')
+metrics = logging.getLogger('arvados.cwl-runner.metrics')
 
 class RuntimeStatusLoggingHandler(logging.Handler):
     """
diff --git a/sdk/cwl/arvados_cwl/runner.py b/sdk/cwl/arvados_cwl/runner.py
index 3b40552ac..31a424d30 100644
--- a/sdk/cwl/arvados_cwl/runner.py
+++ b/sdk/cwl/arvados_cwl/runner.py
@@ -26,7 +26,7 @@ from cwltool.pack import pack
 import arvados.collection
 import ruamel.yaml as yaml
 
-from .arvdocker import arv_docker_get_image
+import arvdocker
 from .pathmapper import ArvPathMapper, trim_listing
 from ._version import __version__
 from . import done
@@ -215,9 +215,9 @@ def upload_docker(arvrunner, tool):
                 # TODO: can be supported by containers API, but not jobs API.
                 raise SourceLine(docker_req, "dockerOutputDirectory", UnsupportedRequirement).makeError(
                     "Option 'dockerOutputDirectory' of DockerRequirement not supported.")
-            arv_docker_get_image(arvrunner.api, docker_req, True, arvrunner.project_uuid)
+            arvdocker.arv_docker_get_image(arvrunner.api, docker_req, True, arvrunner.project_uuid)
         else:
-            arv_docker_get_image(arvrunner.api, {"dockerPull": "arvados/jobs"}, True, arvrunner.project_uuid)
+            arvdocker.arv_docker_get_image(arvrunner.api, {"dockerPull": "arvados/jobs"}, True, arvrunner.project_uuid)
     elif isinstance(tool, cwltool.workflow.Workflow):
         for s in tool.steps:
             upload_docker(arvrunner, s.embedded_tool)
@@ -244,6 +244,9 @@ def packed_workflow(arvrunner, tool, merged_map):
                 v["location"] = merged_map[cur_id].resolved[v["location"]]
             if "location" in v and v["location"] in merged_map[cur_id].secondaryFiles:
                 v["secondaryFiles"] = merged_map[cur_id].secondaryFiles[v["location"]]
+            if v.get("class") == "DockerRequirement":
+                img = v.get("dockerImageId") or v.get("dockerPull")
+                v["http://arvados.org/cwl#dockerCollectionPDH"] = arvdocker.cached_lookups[img]
             for l in v:
                 visit(v[l], cur_id)
         if isinstance(v, list):
@@ -324,7 +327,7 @@ def arvados_jobs_image(arvrunner, img):
     """Determine if the right arvados/jobs image version is available.  If not, try to pull and upload it."""
 
     try:
-        return arv_docker_get_image(arvrunner.api, {"dockerPull": img}, True, arvrunner.project_uuid)
+        return arvdocker.arv_docker_get_image(arvrunner.api, {"dockerPull": img}, True, arvrunner.project_uuid)
     except Exception as e:
         raise Exception("Docker image %s is not available\n%s" % (img, e) )
 

commit be956be9fd856acab7d3ec1c7e6e8a7b0330ac67
Author: Peter Amstutz <pamstutz at veritasgenetics.com>
Date:   Thu Oct 25 15:03:23 2018 -0400

    14198: Add genericFederatedRequestHandler support for links
    
    Arvados-DCO-1.1-Signed-off-by: Peter Amstutz <pamstutz at veritasgenetics.com>

diff --git a/lib/controller/federation.go b/lib/controller/federation.go
index e08a1c167..8d5d08963 100644
--- a/lib/controller/federation.go
+++ b/lib/controller/federation.go
@@ -27,6 +27,7 @@ var containersRe = regexp.MustCompile(fmt.Sprintf(pathPattern, "containers", "dz
 var containerRequestsRe = regexp.MustCompile(fmt.Sprintf(pathPattern, "container_requests", "xvhdp"))
 var collectionRe = regexp.MustCompile(fmt.Sprintf(pathPattern, "collections", "4zz18"))
 var collectionByPDHRe = regexp.MustCompile(`^/arvados/v1/collections/([0-9a-fA-F]{32}\+[0-9]+)+$`)
+var linksRe = regexp.MustCompile(fmt.Sprintf(pathPattern, "links", "o0j2j"))
 
 func (h *Handler) remoteClusterRequest(remoteID string, req *http.Request) (*http.Response, error) {
 	remote, ok := h.Cluster.RemoteClusters[remoteID]
@@ -89,9 +90,12 @@ func (h *Handler) setupProxyRemoteCluster(next http.Handler) http.Handler {
 	containersHandler := &genericFederatedRequestHandler{next, h, containersRe, nil}
 	containerRequestsHandler := &genericFederatedRequestHandler{next, h, containerRequestsRe,
 		[]federatedRequestDelegate{remoteContainerRequestCreate}}
+	linksHandler := &genericFederatedRequestHandler{next, h, linksRe, nil}
 
 	mux.Handle("/arvados/v1/workflows", wfHandler)
 	mux.Handle("/arvados/v1/workflows/", wfHandler)
+	mux.Handle("/arvados/v1/links", linksHandler)
+	mux.Handle("/arvados/v1/links/", linksHandler)
 	mux.Handle("/arvados/v1/containers", containersHandler)
 	mux.Handle("/arvados/v1/containers/", containersHandler)
 	mux.Handle("/arvados/v1/container_requests", containerRequestsHandler)

commit ea44a89134fcf616ab4d138bed60fa7337f2df6a
Author: Peter Amstutz <pamstutz at veritasgenetics.com>
Date:   Thu Oct 25 15:02:23 2018 -0400

    14198: Refactor and add support for --submit-runner-cluster
    
    Rename ArvCwlRunner to ArvCwlExecutor and move into its own file.
    
    Arvados-DCO-1.1-Signed-off-by: Peter Amstutz <pamstutz at veritasgenetics.com>

diff --git a/sdk/cwl/arvados_cwl/__init__.py b/sdk/cwl/arvados_cwl/__init__.py
index 0866f69d6..63fc3ea47 100644
--- a/sdk/cwl/arvados_cwl/__init__.py
+++ b/sdk/cwl/arvados_cwl/__init__.py
@@ -10,19 +10,9 @@ import argparse
 import logging
 import os
 import sys
-import threading
-import hashlib
-import copy
-import json
 import re
-from functools import partial
 import pkg_resources  # part of setuptools
-import Queue
-import time
-import signal
-import thread
 
-from cwltool.errors import WorkflowException
 import cwltool.main
 import cwltool.workflow
 import cwltool.process
@@ -36,23 +26,12 @@ from arvados.keep import KeepClient
 from arvados.errors import ApiError
 import arvados.commands._util as arv_cmd
 
-from .arvcontainer import ArvadosContainer, RunnerContainer
-from .arvjob import ArvadosJob, RunnerJob, RunnerTemplate
-from .runner import Runner, upload_docker, upload_job_order, upload_workflow_deps
-from .arvtool import ArvadosCommandTool
-from .arvworkflow import ArvadosWorkflow, upload_workflow
-from .fsaccess import CollectionFsAccess, CollectionFetcher, collectionResolver, CollectionCache
 from .perf import Perf
-from .pathmapper import NoFollowPathMapper
-from .task_queue import TaskQueue
-from .context import ArvLoadingContext, ArvRuntimeContext
-from .util import get_current_container
 from ._version import __version__
+from .executor import ArvCwlExecutor
 
-from cwltool.pack import pack
 from cwltool.process import shortname, UnsupportedRequirement, use_custom_schema
 from cwltool.pathmapper import adjustFileObjs, adjustDirObjs, get_listing
-from cwltool.command_line_tool import compute_checksums
 
 from arvados.api import OrderedJsonModel
 
@@ -66,677 +45,6 @@ arvados.log_handler.setFormatter(logging.Formatter(
 
 DEFAULT_PRIORITY = 500
 
-class RuntimeStatusLoggingHandler(logging.Handler):
-    """
-    Intercepts logging calls and report them as runtime statuses on runner
-    containers.
-    """
-    def __init__(self, runtime_status_update_func):
-        super(RuntimeStatusLoggingHandler, self).__init__()
-        self.runtime_status_update = runtime_status_update_func
-
-    def emit(self, record):
-        kind = None
-        if record.levelno >= logging.ERROR:
-            kind = 'error'
-        elif record.levelno >= logging.WARNING:
-            kind = 'warning'
-        if kind is not None:
-            log_msg = record.getMessage()
-            if '\n' in log_msg:
-                # If the logged message is multi-line, use its first line as status
-                # and the rest as detail.
-                status, detail = log_msg.split('\n', 1)
-                self.runtime_status_update(
-                    kind,
-                    "%s: %s" % (record.name, status),
-                    detail
-                )
-            else:
-                self.runtime_status_update(
-                    kind,
-                    "%s: %s" % (record.name, record.getMessage())
-                )
-
-class ArvCwlRunner(object):
-    """Execute a CWL tool or workflow, submit work (using either jobs or
-    containers API), wait for them to complete, and report output.
-
-    """
-
-    def __init__(self, api_client,
-                 arvargs=None,
-                 keep_client=None,
-                 num_retries=4,
-                 thread_count=4):
-
-        if arvargs is None:
-            arvargs = argparse.Namespace()
-            arvargs.work_api = None
-            arvargs.output_name = None
-            arvargs.output_tags = None
-            arvargs.thread_count = 1
-
-        self.api = api_client
-        self.processes = {}
-        self.workflow_eval_lock = threading.Condition(threading.RLock())
-        self.final_output = None
-        self.final_status = None
-        self.num_retries = num_retries
-        self.uuid = None
-        self.stop_polling = threading.Event()
-        self.poll_api = None
-        self.pipeline = None
-        self.final_output_collection = None
-        self.output_name = arvargs.output_name
-        self.output_tags = arvargs.output_tags
-        self.project_uuid = None
-        self.intermediate_output_ttl = 0
-        self.intermediate_output_collections = []
-        self.trash_intermediate = False
-        self.thread_count = arvargs.thread_count
-        self.poll_interval = 12
-        self.loadingContext = None
-
-        if keep_client is not None:
-            self.keep_client = keep_client
-        else:
-            self.keep_client = arvados.keep.KeepClient(api_client=self.api, num_retries=self.num_retries)
-
-        self.collection_cache = CollectionCache(self.api, self.keep_client, self.num_retries)
-
-        self.fetcher_constructor = partial(CollectionFetcher,
-                                           api_client=self.api,
-                                           fs_access=CollectionFsAccess("", collection_cache=self.collection_cache),
-                                           num_retries=self.num_retries)
-
-        self.work_api = None
-        expected_api = ["jobs", "containers"]
-        for api in expected_api:
-            try:
-                methods = self.api._rootDesc.get('resources')[api]['methods']
-                if ('httpMethod' in methods['create'] and
-                    (arvargs.work_api == api or arvargs.work_api is None)):
-                    self.work_api = api
-                    break
-            except KeyError:
-                pass
-
-        if not self.work_api:
-            if arvargs.work_api is None:
-                raise Exception("No supported APIs")
-            else:
-                raise Exception("Unsupported API '%s', expected one of %s" % (arvargs.work_api, expected_api))
-
-        if self.work_api == "jobs":
-            logger.warn("""
-*******************************
-Using the deprecated 'jobs' API.
-
-To get rid of this warning:
-
-Users: read about migrating at
-http://doc.arvados.org/user/cwl/cwl-style.html#migrate
-and use the option --api=containers
-
-Admins: configure the cluster to disable the 'jobs' API as described at:
-http://doc.arvados.org/install/install-api-server.html#disable_api_methods
-*******************************""")
-
-        self.loadingContext = ArvLoadingContext(vars(arvargs))
-        self.loadingContext.fetcher_constructor = self.fetcher_constructor
-        self.loadingContext.resolver = partial(collectionResolver, self.api, num_retries=self.num_retries)
-        self.loadingContext.construct_tool_object = self.arv_make_tool
-
-        # Add a custom logging handler to the root logger for runtime status reporting
-        # if running inside a container
-        if get_current_container(self.api, self.num_retries, logger):
-            root_logger = logging.getLogger('')
-            handler = RuntimeStatusLoggingHandler(self.runtime_status_update)
-            root_logger.addHandler(handler)
-
-    def arv_make_tool(self, toolpath_object, loadingContext):
-        if "class" in toolpath_object and toolpath_object["class"] == "CommandLineTool":
-            return ArvadosCommandTool(self, toolpath_object, loadingContext)
-        elif "class" in toolpath_object and toolpath_object["class"] == "Workflow":
-            return ArvadosWorkflow(self, toolpath_object, loadingContext)
-        else:
-            return cwltool.workflow.default_make_tool(toolpath_object, loadingContext)
-
-    def output_callback(self, out, processStatus):
-        with self.workflow_eval_lock:
-            if processStatus == "success":
-                logger.info("Overall process status is %s", processStatus)
-                state = "Complete"
-            else:
-                logger.error("Overall process status is %s", processStatus)
-                state = "Failed"
-            if self.pipeline:
-                self.api.pipeline_instances().update(uuid=self.pipeline["uuid"],
-                                                        body={"state": state}).execute(num_retries=self.num_retries)
-            self.final_status = processStatus
-            self.final_output = out
-            self.workflow_eval_lock.notifyAll()
-
-
-    def start_run(self, runnable, runtimeContext):
-        self.task_queue.add(partial(runnable.run, runtimeContext))
-
-    def process_submitted(self, container):
-        with self.workflow_eval_lock:
-            self.processes[container.uuid] = container
-
-    def process_done(self, uuid, record):
-        with self.workflow_eval_lock:
-            j = self.processes[uuid]
-            logger.info("%s %s is %s", self.label(j), uuid, record["state"])
-            self.task_queue.add(partial(j.done, record))
-            del self.processes[uuid]
-
-    def runtime_status_update(self, kind, message, detail=None):
-        """
-        Updates the runtime_status field on the runner container.
-        Called when there's a need to report errors, warnings or just
-        activity statuses, for example in the RuntimeStatusLoggingHandler.
-        """
-        with self.workflow_eval_lock:
-            current = get_current_container(self.api, self.num_retries, logger)
-            if current is None:
-                return
-            runtime_status = current.get('runtime_status', {})
-            # In case of status being an error, only report the first one.
-            if kind == 'error':
-                if not runtime_status.get('error'):
-                    runtime_status.update({
-                        'error': message
-                    })
-                    if detail is not None:
-                        runtime_status.update({
-                            'errorDetail': detail
-                        })
-                # Further errors are only mentioned as a count.
-                else:
-                    # Get anything before an optional 'and N more' string.
-                    try:
-                        error_msg = re.match(
-                            r'^(.*?)(?=\s*\(and \d+ more\)|$)', runtime_status.get('error')).groups()[0]
-                        more_failures = re.match(
-                            r'.*\(and (\d+) more\)', runtime_status.get('error'))
-                    except TypeError:
-                        # Ignore tests stubbing errors
-                        return
-                    if more_failures:
-                        failure_qty = int(more_failures.groups()[0])
-                        runtime_status.update({
-                            'error': "%s (and %d more)" % (error_msg, failure_qty+1)
-                        })
-                    else:
-                        runtime_status.update({
-                            'error': "%s (and 1 more)" % error_msg
-                        })
-            elif kind in ['warning', 'activity']:
-                # Record the last warning/activity status without regard of
-                # previous occurences.
-                runtime_status.update({
-                    kind: message
-                })
-                if detail is not None:
-                    runtime_status.update({
-                        kind+"Detail": detail
-                    })
-            else:
-                # Ignore any other status kind
-                return
-            try:
-                self.api.containers().update(uuid=current['uuid'],
-                                            body={
-                                                'runtime_status': runtime_status,
-                                            }).execute(num_retries=self.num_retries)
-            except Exception as e:
-                logger.info("Couldn't update runtime_status: %s", e)
-
-    def wrapped_callback(self, cb, obj, st):
-        with self.workflow_eval_lock:
-            cb(obj, st)
-            self.workflow_eval_lock.notifyAll()
-
-    def get_wrapped_callback(self, cb):
-        return partial(self.wrapped_callback, cb)
-
-    def on_message(self, event):
-        if event.get("object_uuid") in self.processes and event["event_type"] == "update":
-            uuid = event["object_uuid"]
-            if event["properties"]["new_attributes"]["state"] == "Running":
-                with self.workflow_eval_lock:
-                    j = self.processes[uuid]
-                    if j.running is False:
-                        j.running = True
-                        j.update_pipeline_component(event["properties"]["new_attributes"])
-                        logger.info("%s %s is Running", self.label(j), uuid)
-            elif event["properties"]["new_attributes"]["state"] in ("Complete", "Failed", "Cancelled", "Final"):
-                self.process_done(uuid, event["properties"]["new_attributes"])
-
-    def label(self, obj):
-        return "[%s %s]" % (self.work_api[0:-1], obj.name)
-
-    def poll_states(self):
-        """Poll status of jobs or containers listed in the processes dict.
-
-        Runs in a separate thread.
-        """
-
-        try:
-            remain_wait = self.poll_interval
-            while True:
-                if remain_wait > 0:
-                    self.stop_polling.wait(remain_wait)
-                if self.stop_polling.is_set():
-                    break
-                with self.workflow_eval_lock:
-                    keys = list(self.processes.keys())
-                if not keys:
-                    remain_wait = self.poll_interval
-                    continue
-
-                begin_poll = time.time()
-                if self.work_api == "containers":
-                    table = self.poll_api.container_requests()
-                elif self.work_api == "jobs":
-                    table = self.poll_api.jobs()
-
-                try:
-                    proc_states = table.list(filters=[["uuid", "in", keys]]).execute(num_retries=self.num_retries)
-                except Exception as e:
-                    logger.warn("Error checking states on API server: %s", e)
-                    remain_wait = self.poll_interval
-                    continue
-
-                for p in proc_states["items"]:
-                    self.on_message({
-                        "object_uuid": p["uuid"],
-                        "event_type": "update",
-                        "properties": {
-                            "new_attributes": p
-                        }
-                    })
-                finish_poll = time.time()
-                remain_wait = self.poll_interval - (finish_poll - begin_poll)
-        except:
-            logger.exception("Fatal error in state polling thread.")
-            with self.workflow_eval_lock:
-                self.processes.clear()
-                self.workflow_eval_lock.notifyAll()
-        finally:
-            self.stop_polling.set()
-
-    def add_intermediate_output(self, uuid):
-        if uuid:
-            self.intermediate_output_collections.append(uuid)
-
-    def trash_intermediate_output(self):
-        logger.info("Cleaning up intermediate output collections")
-        for i in self.intermediate_output_collections:
-            try:
-                self.api.collections().delete(uuid=i).execute(num_retries=self.num_retries)
-            except:
-                logger.warn("Failed to delete intermediate output: %s", sys.exc_info()[1], exc_info=(sys.exc_info()[1] if self.debug else False))
-            if sys.exc_info()[0] is KeyboardInterrupt or sys.exc_info()[0] is SystemExit:
-                break
-
-    def check_features(self, obj):
-        if isinstance(obj, dict):
-            if obj.get("writable") and self.work_api != "containers":
-                raise SourceLine(obj, "writable", UnsupportedRequirement).makeError("InitialWorkDir feature 'writable: true' not supported with --api=jobs")
-            if obj.get("class") == "DockerRequirement":
-                if obj.get("dockerOutputDirectory"):
-                    if self.work_api != "containers":
-                        raise SourceLine(obj, "dockerOutputDirectory", UnsupportedRequirement).makeError(
-                            "Option 'dockerOutputDirectory' of DockerRequirement not supported with --api=jobs.")
-                    if not obj.get("dockerOutputDirectory").startswith('/'):
-                        raise SourceLine(obj, "dockerOutputDirectory", validate.ValidationException).makeError(
-                            "Option 'dockerOutputDirectory' must be an absolute path.")
-            if obj.get("class") == "http://commonwl.org/cwltool#Secrets" and self.work_api != "containers":
-                raise SourceLine(obj, "class", UnsupportedRequirement).makeError("Secrets not supported with --api=jobs")
-            for v in obj.itervalues():
-                self.check_features(v)
-        elif isinstance(obj, list):
-            for i,v in enumerate(obj):
-                with SourceLine(obj, i, UnsupportedRequirement, logger.isEnabledFor(logging.DEBUG)):
-                    self.check_features(v)
-
-    def make_output_collection(self, name, storage_classes, tagsString, outputObj):
-        outputObj = copy.deepcopy(outputObj)
-
-        files = []
-        def capture(fileobj):
-            files.append(fileobj)
-
-        adjustDirObjs(outputObj, capture)
-        adjustFileObjs(outputObj, capture)
-
-        generatemapper = NoFollowPathMapper(files, "", "", separateDirs=False)
-
-        final = arvados.collection.Collection(api_client=self.api,
-                                              keep_client=self.keep_client,
-                                              num_retries=self.num_retries)
-
-        for k,v in generatemapper.items():
-            if k.startswith("_:"):
-                if v.type == "Directory":
-                    continue
-                if v.type == "CreateFile":
-                    with final.open(v.target, "wb") as f:
-                        f.write(v.resolved.encode("utf-8"))
-                    continue
-
-            if not k.startswith("keep:"):
-                raise Exception("Output source is not in keep or a literal")
-            sp = k.split("/")
-            srccollection = sp[0][5:]
-            try:
-                reader = self.collection_cache.get(srccollection)
-                srcpath = "/".join(sp[1:]) if len(sp) > 1 else "."
-                final.copy(srcpath, v.target, source_collection=reader, overwrite=False)
-            except arvados.errors.ArgumentError as e:
-                logger.error("Creating CollectionReader for '%s' '%s': %s", k, v, e)
-                raise
-            except IOError as e:
-                logger.warn("While preparing output collection: %s", e)
-
-        def rewrite(fileobj):
-            fileobj["location"] = generatemapper.mapper(fileobj["location"]).target
-            for k in ("listing", "contents", "nameext", "nameroot", "dirname"):
-                if k in fileobj:
-                    del fileobj[k]
-
-        adjustDirObjs(outputObj, rewrite)
-        adjustFileObjs(outputObj, rewrite)
-
-        with final.open("cwl.output.json", "w") as f:
-            json.dump(outputObj, f, sort_keys=True, indent=4, separators=(',',': '))
-
-        final.save_new(name=name, owner_uuid=self.project_uuid, storage_classes=storage_classes, ensure_unique_name=True)
-
-        logger.info("Final output collection %s \"%s\" (%s)", final.portable_data_hash(),
-                    final.api_response()["name"],
-                    final.manifest_locator())
-
-        final_uuid = final.manifest_locator()
-        tags = tagsString.split(',')
-        for tag in tags:
-             self.api.links().create(body={
-                "head_uuid": final_uuid, "link_class": "tag", "name": tag
-                }).execute(num_retries=self.num_retries)
-
-        def finalcollection(fileobj):
-            fileobj["location"] = "keep:%s/%s" % (final.portable_data_hash(), fileobj["location"])
-
-        adjustDirObjs(outputObj, finalcollection)
-        adjustFileObjs(outputObj, finalcollection)
-
-        return (outputObj, final)
-
-    def set_crunch_output(self):
-        if self.work_api == "containers":
-            current = get_current_container(self.api, self.num_retries, logger)
-            if current is None:
-                return
-            try:
-                self.api.containers().update(uuid=current['uuid'],
-                                             body={
-                                                 'output': self.final_output_collection.portable_data_hash(),
-                                             }).execute(num_retries=self.num_retries)
-                self.api.collections().update(uuid=self.final_output_collection.manifest_locator(),
-                                              body={
-                                                  'is_trashed': True
-                                              }).execute(num_retries=self.num_retries)
-            except Exception as e:
-                logger.info("Setting container output: %s", e)
-        elif self.work_api == "jobs" and "TASK_UUID" in os.environ:
-            self.api.job_tasks().update(uuid=os.environ["TASK_UUID"],
-                                   body={
-                                       'output': self.final_output_collection.portable_data_hash(),
-                                       'success': self.final_status == "success",
-                                       'progress':1.0
-                                   }).execute(num_retries=self.num_retries)
-
-    def arv_executor(self, tool, job_order, runtimeContext, logger=None):
-        self.debug = runtimeContext.debug
-
-        tool.visit(self.check_features)
-
-        self.project_uuid = runtimeContext.project_uuid
-        self.pipeline = None
-        self.fs_access = runtimeContext.make_fs_access(runtimeContext.basedir)
-        self.secret_store = runtimeContext.secret_store
-
-        self.trash_intermediate = runtimeContext.trash_intermediate
-        if self.trash_intermediate and self.work_api != "containers":
-            raise Exception("--trash-intermediate is only supported with --api=containers.")
-
-        self.intermediate_output_ttl = runtimeContext.intermediate_output_ttl
-        if self.intermediate_output_ttl and self.work_api != "containers":
-            raise Exception("--intermediate-output-ttl is only supported with --api=containers.")
-        if self.intermediate_output_ttl < 0:
-            raise Exception("Invalid value %d for --intermediate-output-ttl, cannot be less than zero" % self.intermediate_output_ttl)
-
-        if runtimeContext.submit_request_uuid and self.work_api != "containers":
-            raise Exception("--submit-request-uuid requires containers API, but using '{}' api".format(self.work_api))
-
-        if not runtimeContext.name:
-            runtimeContext.name = self.name = tool.tool.get("label") or tool.metadata.get("label") or os.path.basename(tool.tool["id"])
-
-        # Upload direct dependencies of workflow steps, get back mapping of files to keep references.
-        # Also uploads docker images.
-        merged_map = upload_workflow_deps(self, tool)
-
-        # Reload tool object which may have been updated by
-        # upload_workflow_deps
-        # Don't validate this time because it will just print redundant errors.
-        loadingContext = self.loadingContext.copy()
-        loadingContext.loader = tool.doc_loader
-        loadingContext.avsc_names = tool.doc_schema
-        loadingContext.metadata = tool.metadata
-        loadingContext.do_validate = False
-
-        tool = self.arv_make_tool(tool.doc_loader.idx[tool.tool["id"]],
-                                  loadingContext)
-
-        # Upload local file references in the job order.
-        job_order = upload_job_order(self, "%s input" % runtimeContext.name,
-                                     tool, job_order)
-
-        existing_uuid = runtimeContext.update_workflow
-        if existing_uuid or runtimeContext.create_workflow:
-            # Create a pipeline template or workflow record and exit.
-            if self.work_api == "jobs":
-                tmpl = RunnerTemplate(self, tool, job_order,
-                                      runtimeContext.enable_reuse,
-                                      uuid=existing_uuid,
-                                      submit_runner_ram=runtimeContext.submit_runner_ram,
-                                      name=runtimeContext.name,
-                                      merged_map=merged_map)
-                tmpl.save()
-                # cwltool.main will write our return value to stdout.
-                return (tmpl.uuid, "success")
-            elif self.work_api == "containers":
-                return (upload_workflow(self, tool, job_order,
-                                        self.project_uuid,
-                                        uuid=existing_uuid,
-                                        submit_runner_ram=runtimeContext.submit_runner_ram,
-                                        name=runtimeContext.name,
-                                        merged_map=merged_map),
-                        "success")
-
-        self.ignore_docker_for_reuse = runtimeContext.ignore_docker_for_reuse
-        self.eval_timeout = runtimeContext.eval_timeout
-
-        runtimeContext = runtimeContext.copy()
-        runtimeContext.use_container = True
-        runtimeContext.tmpdir_prefix = "tmp"
-        runtimeContext.work_api = self.work_api
-
-        if self.work_api == "containers":
-            if self.ignore_docker_for_reuse:
-                raise Exception("--ignore-docker-for-reuse not supported with containers API.")
-            runtimeContext.outdir = "/var/spool/cwl"
-            runtimeContext.docker_outdir = "/var/spool/cwl"
-            runtimeContext.tmpdir = "/tmp"
-            runtimeContext.docker_tmpdir = "/tmp"
-        elif self.work_api == "jobs":
-            if runtimeContext.priority != DEFAULT_PRIORITY:
-                raise Exception("--priority not implemented for jobs API.")
-            runtimeContext.outdir = "$(task.outdir)"
-            runtimeContext.docker_outdir = "$(task.outdir)"
-            runtimeContext.tmpdir = "$(task.tmpdir)"
-
-        if runtimeContext.priority < 1 or runtimeContext.priority > 1000:
-            raise Exception("--priority must be in the range 1..1000.")
-
-        runnerjob = None
-        if runtimeContext.submit:
-            # Submit a runner job to run the workflow for us.
-            if self.work_api == "containers":
-                if tool.tool["class"] == "CommandLineTool" and runtimeContext.wait:
-                    runtimeContext.runnerjob = tool.tool["id"]
-                    runnerjob = tool.job(job_order,
-                                         self.output_callback,
-                                         runtimeContext).next()
-                else:
-                    runnerjob = RunnerContainer(self, tool, job_order, runtimeContext.enable_reuse,
-                                                self.output_name,
-                                                self.output_tags,
-                                                submit_runner_ram=runtimeContext.submit_runner_ram,
-                                                name=runtimeContext.name,
-                                                on_error=runtimeContext.on_error,
-                                                submit_runner_image=runtimeContext.submit_runner_image,
-                                                intermediate_output_ttl=runtimeContext.intermediate_output_ttl,
-                                                merged_map=merged_map,
-                                                priority=runtimeContext.priority,
-                                                secret_store=self.secret_store)
-            elif self.work_api == "jobs":
-                runnerjob = RunnerJob(self, tool, job_order, runtimeContext.enable_reuse,
-                                      self.output_name,
-                                      self.output_tags,
-                                      submit_runner_ram=runtimeContext.submit_runner_ram,
-                                      name=runtimeContext.name,
-                                      on_error=runtimeContext.on_error,
-                                      submit_runner_image=runtimeContext.submit_runner_image,
-                                      merged_map=merged_map)
-        elif runtimeContext.cwl_runner_job is None and self.work_api == "jobs":
-            # Create pipeline for local run
-            self.pipeline = self.api.pipeline_instances().create(
-                body={
-                    "owner_uuid": self.project_uuid,
-                    "name": runtimeContext.name if runtimeContext.name else shortname(tool.tool["id"]),
-                    "components": {},
-                    "state": "RunningOnClient"}).execute(num_retries=self.num_retries)
-            logger.info("Pipeline instance %s", self.pipeline["uuid"])
-
-        if runnerjob and not runtimeContext.wait:
-            submitargs = runtimeContext.copy()
-            submitargs.submit = False
-            runnerjob.run(submitargs)
-            return (runnerjob.uuid, "success")
-
-        self.poll_api = arvados.api('v1', timeout=runtimeContext.http_timeout)
-        self.polling_thread = threading.Thread(target=self.poll_states)
-        self.polling_thread.start()
-
-        self.task_queue = TaskQueue(self.workflow_eval_lock, self.thread_count)
-
-        if runnerjob:
-            jobiter = iter((runnerjob,))
-        else:
-            if runtimeContext.cwl_runner_job is not None:
-                self.uuid = runtimeContext.cwl_runner_job.get('uuid')
-            jobiter = tool.job(job_order,
-                               self.output_callback,
-                               runtimeContext)
-
-        try:
-            self.workflow_eval_lock.acquire()
-            # Holds the lock while this code runs and releases it when
-            # it is safe to do so in self.workflow_eval_lock.wait(),
-            # at which point on_message can update job state and
-            # process output callbacks.
-
-            loopperf = Perf(metrics, "jobiter")
-            loopperf.__enter__()
-            for runnable in jobiter:
-                loopperf.__exit__()
-
-                if self.stop_polling.is_set():
-                    break
-
-                if self.task_queue.error is not None:
-                    raise self.task_queue.error
-
-                if runnable:
-                    with Perf(metrics, "run"):
-                        self.start_run(runnable, runtimeContext)
-                else:
-                    if (self.task_queue.in_flight + len(self.processes)) > 0:
-                        self.workflow_eval_lock.wait(3)
-                    else:
-                        logger.error("Workflow is deadlocked, no runnable processes and not waiting on any pending processes.")
-                        break
-                loopperf.__enter__()
-            loopperf.__exit__()
-
-            while (self.task_queue.in_flight + len(self.processes)) > 0:
-                if self.task_queue.error is not None:
-                    raise self.task_queue.error
-                self.workflow_eval_lock.wait(3)
-
-        except UnsupportedRequirement:
-            raise
-        except:
-            if sys.exc_info()[0] is KeyboardInterrupt or sys.exc_info()[0] is SystemExit:
-                logger.error("Interrupted, workflow will be cancelled")
-            else:
-                logger.error("Execution failed: %s", sys.exc_info()[1], exc_info=(sys.exc_info()[1] if self.debug else False))
-            if self.pipeline:
-                self.api.pipeline_instances().update(uuid=self.pipeline["uuid"],
-                                                     body={"state": "Failed"}).execute(num_retries=self.num_retries)
-            if runnerjob and runnerjob.uuid and self.work_api == "containers":
-                self.api.container_requests().update(uuid=runnerjob.uuid,
-                                                     body={"priority": "0"}).execute(num_retries=self.num_retries)
-        finally:
-            self.workflow_eval_lock.release()
-            self.task_queue.drain()
-            self.stop_polling.set()
-            self.polling_thread.join()
-            self.task_queue.join()
-
-        if self.final_status == "UnsupportedRequirement":
-            raise UnsupportedRequirement("Check log for details.")
-
-        if self.final_output is None:
-            raise WorkflowException("Workflow did not return a result.")
-
-        if runtimeContext.submit and isinstance(runnerjob, Runner):
-            logger.info("Final output collection %s", runnerjob.final_output)
-        else:
-            if self.output_name is None:
-                self.output_name = "Output of %s" % (shortname(tool.tool["id"]))
-            if self.output_tags is None:
-                self.output_tags = ""
-
-            storage_classes = runtimeContext.storage_classes.strip().split(",")
-            self.final_output, self.final_output_collection = self.make_output_collection(self.output_name, storage_classes, self.output_tags, self.final_output)
-            self.set_crunch_output()
-
-        if runtimeContext.compute_checksum:
-            adjustDirObjs(self.final_output, partial(get_listing, self.fs_access))
-            adjustFileObjs(self.final_output, partial(compute_checksums, self.fs_access))
-
-        if self.trash_intermediate and self.final_status == "success":
-            self.trash_intermediate_output()
-
-        return (self.final_output, self.final_status)
-
-
 def versionstring():
     """Print version string of key packages for provenance and debugging."""
 
@@ -831,9 +139,13 @@ def arg_parser():  # type: () -> argparse.ArgumentParser
                         help="Docker image for workflow runner job, default arvados/jobs:%s" % __version__,
                         default=None)
 
-    parser.add_argument("--submit-request-uuid", type=str,
+    exgroup = parser.add_mutually_exclusive_group()
+    exgroup.add_argument("--submit-request-uuid", type=str,
                         default=None,
-                        help="Update and commit supplied container request instead of creating a new one (containers API only).")
+                        help="Update and commit to supplied container request instead of creating a new one (containers API only).")
+    exgroup.add_argument("--submit-runner-cluster", type=str,
+                        help="Submit toplevel runner to a remote cluster (containers API only)",
+                        default=None)
 
     parser.add_argument("--name", type=str,
                         help="Name to use for workflow execution instance.",
@@ -942,6 +254,10 @@ def main(args, stdout, stderr, api_client=None, keep_client=None,
 
     add_arv_hints()
 
+    for key, val in cwltool.argparser.get_default_args().items():
+        if not hasattr(arvargs, key):
+            setattr(arvargs, key, val)
+
     try:
         if api_client is None:
             api_client = arvados.safeapi.ThreadSafeApiCache(
@@ -952,7 +268,7 @@ def main(args, stdout, stderr, api_client=None, keep_client=None,
             api_client.users().current().execute()
         if keep_client is None:
             keep_client = arvados.keep.KeepClient(api_client=api_client, num_retries=4)
-        runner = ArvCwlRunner(api_client, arvargs, keep_client=keep_client, num_retries=4)
+        executor = ArvCwlExecutor(api_client, arvargs, keep_client=keep_client, num_retries=4)
     except Exception as e:
         logger.error(e)
         return 1
@@ -977,22 +293,13 @@ def main(args, stdout, stderr, api_client=None, keep_client=None,
     else:
         arvados.log_handler.setFormatter(logging.Formatter('%(name)s %(levelname)s: %(message)s'))
 
-    for key, val in cwltool.argparser.get_default_args().items():
-        if not hasattr(arvargs, key):
-            setattr(arvargs, key, val)
-
-    runtimeContext = ArvRuntimeContext(vars(arvargs))
-    runtimeContext.make_fs_access = partial(CollectionFsAccess,
-                             collection_cache=runner.collection_cache)
-    runtimeContext.http_timeout = arvargs.http_timeout
-
     return cwltool.main.main(args=arvargs,
                              stdout=stdout,
                              stderr=stderr,
-                             executor=runner.arv_executor,
+                             executor=executor.arv_executor,
                              versionfunc=versionstring,
                              job_order_object=job_order_object,
                              logger_handler=arvados.log_handler,
                              custom_schema_callback=add_arv_hints,
-                             loadingContext=runner.loadingContext,
-                             runtimeContext=runtimeContext)
+                             loadingContext=executor.loadingContext,
+                             runtimeContext=executor.runtimeContext)
diff --git a/sdk/cwl/arvados_cwl/arvcontainer.py b/sdk/cwl/arvados_cwl/arvcontainer.py
index b46711af4..7e22a7d39 100644
--- a/sdk/cwl/arvados_cwl/arvcontainer.py
+++ b/sdk/cwl/arvados_cwl/arvcontainer.py
@@ -212,9 +212,10 @@ class ArvadosContainer(JobBase):
             docker_req = {"dockerImageId": "arvados/jobs"}
 
         container_request["container_image"] = arv_docker_get_image(self.arvrunner.api,
-                                                                     docker_req,
-                                                                     runtimeContext.pull_image,
-                                                                     self.arvrunner.project_uuid)
+                                                                    docker_req,
+                                                                    runtimeContext.pull_image,
+                                                                    self.arvrunner.project_uuid,
+                                                                    runtimeContext.submit_runner_cluster)
 
         api_req, _ = self.get_requirement("http://arvados.org/cwl#APIRequirement")
         if api_req:
@@ -490,14 +491,20 @@ class RunnerContainer(Runner):
         if self.arvrunner.project_uuid:
             job_spec["owner_uuid"] = self.arvrunner.project_uuid
 
+        extra_submit_params = {}
+        if runtimeContext.submit_runner_cluster:
+            extra_submit_params["cluster_id"] = runtimeContext.submit_runner_cluster
+
         if runtimeContext.submit_request_uuid:
             response = self.arvrunner.api.container_requests().update(
                 uuid=runtimeContext.submit_request_uuid,
-                body=job_spec
+                body=job_spec,
+                **extra_submit_params
             ).execute(num_retries=self.arvrunner.num_retries)
         else:
             response = self.arvrunner.api.container_requests().create(
-                body=job_spec
+                body=job_spec,
+                **extra_submit_params
             ).execute(num_retries=self.arvrunner.num_retries)
 
         self.uuid = response["uuid"]
diff --git a/sdk/cwl/arvados_cwl/context.py b/sdk/cwl/arvados_cwl/context.py
index 48a3edec5..4e1334c1c 100644
--- a/sdk/cwl/arvados_cwl/context.py
+++ b/sdk/cwl/arvados_cwl/context.py
@@ -30,5 +30,9 @@ class ArvRuntimeContext(RuntimeContext):
         self.storage_classes = "default"
         self.current_container = None
         self.http_timeout = 300
+        self.submit_runner_cluster = None
 
         super(ArvRuntimeContext, self).__init__(kwargs)
+
+        if self.submit_request_uuid:
+            self.submit_runner_cluster = self.submit_request_uuid[0:5]
diff --git a/sdk/cwl/arvados_cwl/__init__.py b/sdk/cwl/arvados_cwl/executor.py
similarity index 69%
copy from sdk/cwl/arvados_cwl/__init__.py
copy to sdk/cwl/arvados_cwl/executor.py
index 0866f69d6..bbfb8ffc6 100644
--- a/sdk/cwl/arvados_cwl/__init__.py
+++ b/sdk/cwl/arvados_cwl/executor.py
@@ -1,43 +1,26 @@
-#!/usr/bin/env python
-# Copyright (C) The Arvados Authors. All rights reserved.
-#
-# SPDX-License-Identifier: Apache-2.0
-
-# Implement cwl-runner interface for submitting and running work on Arvados, using
-# either the Crunch jobs API or Crunch containers API.
-
 import argparse
 import logging
 import os
 import sys
 import threading
-import hashlib
 import copy
 import json
 import re
 from functools import partial
-import pkg_resources  # part of setuptools
-import Queue
 import time
-import signal
-import thread
 
 from cwltool.errors import WorkflowException
-import cwltool.main
 import cwltool.workflow
-import cwltool.process
 from schema_salad.sourceline import SourceLine
 import schema_salad.validate as validate
-import cwltool.argparser
 
 import arvados
 import arvados.config
 from arvados.keep import KeepClient
 from arvados.errors import ApiError
-import arvados.commands._util as arv_cmd
 
-from .arvcontainer import ArvadosContainer, RunnerContainer
-from .arvjob import ArvadosJob, RunnerJob, RunnerTemplate
+from .arvcontainer import RunnerContainer
+from .arvjob import RunnerJob, RunnerTemplate
 from .runner import Runner, upload_docker, upload_job_order, upload_workflow_deps
 from .arvtool import ArvadosCommandTool
 from .arvworkflow import ArvadosWorkflow, upload_workflow
@@ -49,22 +32,11 @@ from .context import ArvLoadingContext, ArvRuntimeContext
 from .util import get_current_container
 from ._version import __version__
 
-from cwltool.pack import pack
 from cwltool.process import shortname, UnsupportedRequirement, use_custom_schema
 from cwltool.pathmapper import adjustFileObjs, adjustDirObjs, get_listing
 from cwltool.command_line_tool import compute_checksums
 
-from arvados.api import OrderedJsonModel
-
 logger = logging.getLogger('arvados.cwl-runner')
-metrics = logging.getLogger('arvados.cwl-runner.metrics')
-logger.setLevel(logging.INFO)
-
-arvados.log_handler.setFormatter(logging.Formatter(
-        '%(asctime)s %(name)s %(levelname)s: %(message)s',
-        '%Y-%m-%d %H:%M:%S'))
-
-DEFAULT_PRIORITY = 500
 
 class RuntimeStatusLoggingHandler(logging.Handler):
     """
@@ -98,7 +70,7 @@ class RuntimeStatusLoggingHandler(logging.Handler):
                     "%s: %s" % (record.name, record.getMessage())
                 )
 
-class ArvCwlRunner(object):
+class ArvCwlExecutor(object):
     """Execute a CWL tool or workflow, submit work (using either jobs or
     containers API), wait for them to complete, and report output.
 
@@ -195,6 +167,11 @@ http://doc.arvados.org/install/install-api-server.html#disable_api_methods
             handler = RuntimeStatusLoggingHandler(self.runtime_status_update)
             root_logger.addHandler(handler)
 
+        self.runtimeContext = ArvRuntimeContext(vars(arvargs))
+        self.runtimeContext.make_fs_access = partial(CollectionFsAccess,
+                                                     collection_cache=self.collection_cache)
+
+
     def arv_make_tool(self, toolpath_object, loadingContext):
         if "class" in toolpath_object and toolpath_object["class"] == "CommandLineTool":
             return ArvadosCommandTool(self, toolpath_object, loadingContext)
@@ -735,264 +712,3 @@ http://doc.arvados.org/install/install-api-server.html#disable_api_methods
             self.trash_intermediate_output()
 
         return (self.final_output, self.final_status)
-
-
-def versionstring():
-    """Print version string of key packages for provenance and debugging."""
-
-    arvcwlpkg = pkg_resources.require("arvados-cwl-runner")
-    arvpkg = pkg_resources.require("arvados-python-client")
-    cwlpkg = pkg_resources.require("cwltool")
-
-    return "%s %s, %s %s, %s %s" % (sys.argv[0], arvcwlpkg[0].version,
-                                    "arvados-python-client", arvpkg[0].version,
-                                    "cwltool", cwlpkg[0].version)
-
-
-def arg_parser():  # type: () -> argparse.ArgumentParser
-    parser = argparse.ArgumentParser(description='Arvados executor for Common Workflow Language')
-
-    parser.add_argument("--basedir", type=str,
-                        help="Base directory used to resolve relative references in the input, default to directory of input object file or current directory (if inputs piped/provided on command line).")
-    parser.add_argument("--outdir", type=str, default=os.path.abspath('.'),
-                        help="Output directory, default current directory")
-
-    parser.add_argument("--eval-timeout",
-                        help="Time to wait for a Javascript expression to evaluate before giving an error, default 20s.",
-                        type=float,
-                        default=20)
-
-    exgroup = parser.add_mutually_exclusive_group()
-    exgroup.add_argument("--print-dot", action="store_true",
-                         help="Print workflow visualization in graphviz format and exit")
-    exgroup.add_argument("--version", action="version", help="Print version and exit", version=versionstring())
-    exgroup.add_argument("--validate", action="store_true", help="Validate CWL document only.")
-
-    exgroup = parser.add_mutually_exclusive_group()
-    exgroup.add_argument("--verbose", action="store_true", help="Default logging")
-    exgroup.add_argument("--quiet", action="store_true", help="Only print warnings and errors.")
-    exgroup.add_argument("--debug", action="store_true", help="Print even more logging")
-
-    parser.add_argument("--metrics", action="store_true", help="Print timing metrics")
-
-    parser.add_argument("--tool-help", action="store_true", help="Print command line help for tool")
-
-    exgroup = parser.add_mutually_exclusive_group()
-    exgroup.add_argument("--enable-reuse", action="store_true",
-                        default=True, dest="enable_reuse",
-                        help="Enable job or container reuse (default)")
-    exgroup.add_argument("--disable-reuse", action="store_false",
-                        default=True, dest="enable_reuse",
-                        help="Disable job or container reuse")
-
-    parser.add_argument("--project-uuid", type=str, metavar="UUID", help="Project that will own the workflow jobs, if not provided, will go to home project.")
-    parser.add_argument("--output-name", type=str, help="Name to use for collection that stores the final output.", default=None)
-    parser.add_argument("--output-tags", type=str, help="Tags for the final output collection separated by commas, e.g., '--output-tags tag0,tag1,tag2'.", default=None)
-    parser.add_argument("--ignore-docker-for-reuse", action="store_true",
-                        help="Ignore Docker image version when deciding whether to reuse past jobs.",
-                        default=False)
-
-    exgroup = parser.add_mutually_exclusive_group()
-    exgroup.add_argument("--submit", action="store_true", help="Submit workflow to run on Arvados.",
-                        default=True, dest="submit")
-    exgroup.add_argument("--local", action="store_false", help="Run workflow on local host (submits jobs to Arvados).",
-                        default=True, dest="submit")
-    exgroup.add_argument("--create-template", action="store_true", help="(Deprecated) synonym for --create-workflow.",
-                         dest="create_workflow")
-    exgroup.add_argument("--create-workflow", action="store_true", help="Create an Arvados workflow (if using the 'containers' API) or pipeline template (if using the 'jobs' API). See --api.")
-    exgroup.add_argument("--update-workflow", type=str, metavar="UUID", help="Update an existing Arvados workflow or pipeline template with the given UUID.")
-
-    exgroup = parser.add_mutually_exclusive_group()
-    exgroup.add_argument("--wait", action="store_true", help="After submitting workflow runner job, wait for completion.",
-                        default=True, dest="wait")
-    exgroup.add_argument("--no-wait", action="store_false", help="Submit workflow runner job and exit.",
-                        default=True, dest="wait")
-
-    exgroup = parser.add_mutually_exclusive_group()
-    exgroup.add_argument("--log-timestamps", action="store_true", help="Prefix logging lines with timestamp",
-                        default=True, dest="log_timestamps")
-    exgroup.add_argument("--no-log-timestamps", action="store_false", help="No timestamp on logging lines",
-                        default=True, dest="log_timestamps")
-
-    parser.add_argument("--api", type=str,
-                        default=None, dest="work_api",
-                        choices=("jobs", "containers"),
-                        help="Select work submission API.  Default is 'jobs' if that API is available, otherwise 'containers'.")
-
-    parser.add_argument("--compute-checksum", action="store_true", default=False,
-                        help="Compute checksum of contents while collecting outputs",
-                        dest="compute_checksum")
-
-    parser.add_argument("--submit-runner-ram", type=int,
-                        help="RAM (in MiB) required for the workflow runner job (default 1024)",
-                        default=None)
-
-    parser.add_argument("--submit-runner-image", type=str,
-                        help="Docker image for workflow runner job, default arvados/jobs:%s" % __version__,
-                        default=None)
-
-    parser.add_argument("--submit-request-uuid", type=str,
-                        default=None,
-                        help="Update and commit supplied container request instead of creating a new one (containers API only).")
-
-    parser.add_argument("--name", type=str,
-                        help="Name to use for workflow execution instance.",
-                        default=None)
-
-    parser.add_argument("--on-error", type=str,
-                        help="Desired workflow behavior when a step fails.  One of 'stop' or 'continue'. "
-                        "Default is 'continue'.", default="continue", choices=("stop", "continue"))
-
-    parser.add_argument("--enable-dev", action="store_true",
-                        help="Enable loading and running development versions "
-                             "of CWL spec.", default=False)
-    parser.add_argument('--storage-classes', default="default", type=str,
-                        help="Specify comma separated list of storage classes to be used when saving workflow output to Keep.")
-
-    parser.add_argument("--intermediate-output-ttl", type=int, metavar="N",
-                        help="If N > 0, intermediate output collections will be trashed N seconds after creation.  Default is 0 (don't trash).",
-                        default=0)
-
-    parser.add_argument("--priority", type=int,
-                        help="Workflow priority (range 1..1000, higher has precedence over lower, containers api only)",
-                        default=DEFAULT_PRIORITY)
-
-    parser.add_argument("--disable-validate", dest="do_validate",
-                        action="store_false", default=True,
-                        help=argparse.SUPPRESS)
-
-    parser.add_argument("--disable-js-validation",
-                        action="store_true", default=False,
-                        help=argparse.SUPPRESS)
-
-    parser.add_argument("--thread-count", type=int,
-                        default=4, help="Number of threads to use for job submit and output collection.")
-
-    parser.add_argument("--http-timeout", type=int,
-                        default=5*60, dest="http_timeout", help="API request timeout in seconds. Default is 300 seconds (5 minutes).")
-
-    exgroup = parser.add_mutually_exclusive_group()
-    exgroup.add_argument("--trash-intermediate", action="store_true",
-                        default=False, dest="trash_intermediate",
-                         help="Immediately trash intermediate outputs on workflow success.")
-    exgroup.add_argument("--no-trash-intermediate", action="store_false",
-                        default=False, dest="trash_intermediate",
-                        help="Do not trash intermediate outputs (default).")
-
-    parser.add_argument("workflow", type=str, default=None, help="The workflow to execute")
-    parser.add_argument("job_order", nargs=argparse.REMAINDER, help="The input object to the workflow.")
-
-    return parser
-
-def add_arv_hints():
-    cwltool.command_line_tool.ACCEPTLIST_EN_RELAXED_RE = re.compile(r".*")
-    cwltool.command_line_tool.ACCEPTLIST_RE = cwltool.command_line_tool.ACCEPTLIST_EN_RELAXED_RE
-    res = pkg_resources.resource_stream(__name__, 'arv-cwl-schema.yml')
-    use_custom_schema("v1.0", "http://arvados.org/cwl", res.read())
-    res.close()
-    cwltool.process.supportedProcessRequirements.extend([
-        "http://arvados.org/cwl#RunInSingleContainer",
-        "http://arvados.org/cwl#OutputDirType",
-        "http://arvados.org/cwl#RuntimeConstraints",
-        "http://arvados.org/cwl#PartitionRequirement",
-        "http://arvados.org/cwl#APIRequirement",
-        "http://commonwl.org/cwltool#LoadListingRequirement",
-        "http://arvados.org/cwl#IntermediateOutput",
-        "http://arvados.org/cwl#ReuseRequirement",
-        "http://arvados.org/cwl#ClusterTarget"
-    ])
-
-def exit_signal_handler(sigcode, frame):
-    logger.error("Caught signal {}, exiting.".format(sigcode))
-    sys.exit(-sigcode)
-
-def main(args, stdout, stderr, api_client=None, keep_client=None,
-         install_sig_handlers=True):
-    parser = arg_parser()
-
-    job_order_object = None
-    arvargs = parser.parse_args(args)
-
-    if len(arvargs.storage_classes.strip().split(',')) > 1:
-        logger.error("Multiple storage classes are not supported currently.")
-        return 1
-
-    arvargs.use_container = True
-    arvargs.relax_path_checks = True
-    arvargs.print_supported_versions = False
-
-    if install_sig_handlers:
-        arv_cmd.install_signal_handlers()
-
-    if arvargs.update_workflow:
-        if arvargs.update_workflow.find('-7fd4e-') == 5:
-            want_api = 'containers'
-        elif arvargs.update_workflow.find('-p5p6p-') == 5:
-            want_api = 'jobs'
-        else:
-            want_api = None
-        if want_api and arvargs.work_api and want_api != arvargs.work_api:
-            logger.error('--update-workflow arg {!r} uses {!r} API, but --api={!r} specified'.format(
-                arvargs.update_workflow, want_api, arvargs.work_api))
-            return 1
-        arvargs.work_api = want_api
-
-    if (arvargs.create_workflow or arvargs.update_workflow) and not arvargs.job_order:
-        job_order_object = ({}, "")
-
-    add_arv_hints()
-
-    try:
-        if api_client is None:
-            api_client = arvados.safeapi.ThreadSafeApiCache(
-                api_params={"model": OrderedJsonModel(), "timeout": arvargs.http_timeout},
-                keep_params={"num_retries": 4})
-            keep_client = api_client.keep
-            # Make an API object now so errors are reported early.
-            api_client.users().current().execute()
-        if keep_client is None:
-            keep_client = arvados.keep.KeepClient(api_client=api_client, num_retries=4)
-        runner = ArvCwlRunner(api_client, arvargs, keep_client=keep_client, num_retries=4)
-    except Exception as e:
-        logger.error(e)
-        return 1
-
-    if arvargs.debug:
-        logger.setLevel(logging.DEBUG)
-        logging.getLogger('arvados').setLevel(logging.DEBUG)
-
-    if arvargs.quiet:
-        logger.setLevel(logging.WARN)
-        logging.getLogger('arvados').setLevel(logging.WARN)
-        logging.getLogger('arvados.arv-run').setLevel(logging.WARN)
-
-    if arvargs.metrics:
-        metrics.setLevel(logging.DEBUG)
-        logging.getLogger("cwltool.metrics").setLevel(logging.DEBUG)
-
-    if arvargs.log_timestamps:
-        arvados.log_handler.setFormatter(logging.Formatter(
-            '%(asctime)s %(name)s %(levelname)s: %(message)s',
-            '%Y-%m-%d %H:%M:%S'))
-    else:
-        arvados.log_handler.setFormatter(logging.Formatter('%(name)s %(levelname)s: %(message)s'))
-
-    for key, val in cwltool.argparser.get_default_args().items():
-        if not hasattr(arvargs, key):
-            setattr(arvargs, key, val)
-
-    runtimeContext = ArvRuntimeContext(vars(arvargs))
-    runtimeContext.make_fs_access = partial(CollectionFsAccess,
-                             collection_cache=runner.collection_cache)
-    runtimeContext.http_timeout = arvargs.http_timeout
-
-    return cwltool.main.main(args=arvargs,
-                             stdout=stdout,
-                             stderr=stderr,
-                             executor=runner.arv_executor,
-                             versionfunc=versionstring,
-                             job_order_object=job_order_object,
-                             logger_handler=arvados.log_handler,
-                             custom_schema_callback=add_arv_hints,
-                             loadingContext=runner.loadingContext,
-                             runtimeContext=runtimeContext)
diff --git a/sdk/cwl/arvados_cwl/runner.py b/sdk/cwl/arvados_cwl/runner.py
index 41166c512..3b40552ac 100644
--- a/sdk/cwl/arvados_cwl/runner.py
+++ b/sdk/cwl/arvados_cwl/runner.py
@@ -324,10 +324,10 @@ def arvados_jobs_image(arvrunner, img):
     """Determine if the right arvados/jobs image version is available.  If not, try to pull and upload it."""
 
     try:
-        arv_docker_get_image(arvrunner.api, {"dockerPull": img}, True, arvrunner.project_uuid)
+        return arv_docker_get_image(arvrunner.api, {"dockerPull": img}, True, arvrunner.project_uuid)
     except Exception as e:
         raise Exception("Docker image %s is not available\n%s" % (img, e) )
-    return img
+
 
 def upload_workflow_collection(arvrunner, name, packed):
     collection = arvados.collection.Collection(api_client=arvrunner.api,

commit a80be482c20653f275113ea48aa08ab51cf6df5a
Author: Peter Amstutz <pamstutz at veritasgenetics.com>
Date:   Thu Oct 25 10:36:47 2018 -0400

    14198: Use PDH for container_image instead of docker repo+tag
    
    Needed to support federated container requests.
    
    This reverts 6ea807b2caf6c934f170b2e4d89c23c4a08ca69c
    
    Based on the commit comment, that change was made to accomodate the
    Docker v1 to v2 image format migration (to enable the API server to
    select the image with the correct format).  However, the API server
    subsequently gained the ability to detect if it needed to substitute a
    PDH with a migrated image PDH in commit
    a72205728f94f5261b657766e01f5767dc15d4b5 so now we want restore the
    original behavior of locally resolving the image PDH and using that in
    the container request.
    
    Arvados-DCO-1.1-Signed-off-by: Peter Amstutz <pamstutz at veritasgenetics.com>

diff --git a/sdk/cwl/arvados_cwl/arvdocker.py b/sdk/cwl/arvados_cwl/arvdocker.py
index 7508febb0..6bca07c88 100644
--- a/sdk/cwl/arvados_cwl/arvdocker.py
+++ b/sdk/cwl/arvados_cwl/arvdocker.py
@@ -31,7 +31,7 @@ def arv_docker_get_image(api_client, dockerRequirement, pull_image, project_uuid
     global cached_lookups_lock
     with cached_lookups_lock:
         if dockerRequirement["dockerImageId"] in cached_lookups:
-            return dockerRequirement["dockerImageId"]
+            return cached_lookups[dockerRequirement["dockerImageId"]]
 
     with SourceLine(dockerRequirement, "dockerImageId", WorkflowException, logger.isEnabledFor(logging.DEBUG)):
         sp = dockerRequirement["dockerImageId"].split(":")
@@ -70,10 +70,12 @@ def arv_docker_get_image(api_client, dockerRequirement, pull_image, project_uuid
         if not images:
             raise WorkflowException("Could not find Docker image %s:%s" % (image_name, image_tag))
 
+        pdh = api_client.collections().get(uuid=images[0][0]).execute()["portable_data_hash"]
+
         with cached_lookups_lock:
-            cached_lookups[dockerRequirement["dockerImageId"]] = True
+            cached_lookups[dockerRequirement["dockerImageId"]] = pdh
 
-    return dockerRequirement["dockerImageId"]
+    return pdh
 
 def arv_docker_clear_cache():
     global cached_lookups

commit 1155cf657e5d3bf65e5bb53655ff587d912b1ad2
Author: Peter Amstutz <pamstutz at veritasgenetics.com>
Date:   Wed Oct 24 14:45:21 2018 -0400

    14198: Initial support ClusterTarget hint
    
    Arvados-DCO-1.1-Signed-off-by: Peter Amstutz <pamstutz at veritasgenetics.com>

diff --git a/sdk/cwl/arvados_cwl/__init__.py b/sdk/cwl/arvados_cwl/__init__.py
index 2e1ea50a3..0866f69d6 100644
--- a/sdk/cwl/arvados_cwl/__init__.py
+++ b/sdk/cwl/arvados_cwl/__init__.py
@@ -898,7 +898,8 @@ def add_arv_hints():
         "http://arvados.org/cwl#APIRequirement",
         "http://commonwl.org/cwltool#LoadListingRequirement",
         "http://arvados.org/cwl#IntermediateOutput",
-        "http://arvados.org/cwl#ReuseRequirement"
+        "http://arvados.org/cwl#ReuseRequirement",
+        "http://arvados.org/cwl#ClusterTarget"
     ])
 
 def exit_signal_handler(sigcode, frame):
diff --git a/sdk/cwl/arvados_cwl/arv-cwl-schema.yml b/sdk/cwl/arvados_cwl/arv-cwl-schema.yml
index 4f762192a..94eaf9560 100644
--- a/sdk/cwl/arvados_cwl/arv-cwl-schema.yml
+++ b/sdk/cwl/arvados_cwl/arv-cwl-schema.yml
@@ -232,4 +232,24 @@ $graph:
     coresMin:
       type: int?
       doc: Minimum cores allocated to cwl-runner
-      jsonldPredicate: "https://w3id.org/cwl/cwl#ResourceRequirement/coresMin"
\ No newline at end of file
+      jsonldPredicate: "https://w3id.org/cwl/cwl#ResourceRequirement/coresMin"
+
+- name: ClusterTarget
+  type: record
+  extends: cwl:ProcessRequirement
+  inVocab: false
+  doc: |
+    Specify where a workflow step should run
+  fields:
+    class:
+      type: string
+      doc: "Always 'arv:ClusterTarget'"
+      jsonldPredicate:
+        _id: "@type"
+        _type: "@vocab"
+    clusterID:
+      type: string?
+      doc: The cluster to run the container
+    ownerUUID:
+      type: string?
+      doc: The project that will own the container requests and intermediate collections
diff --git a/sdk/cwl/arvados_cwl/arvcontainer.py b/sdk/cwl/arvados_cwl/arvcontainer.py
index b4d01019f..b46711af4 100644
--- a/sdk/cwl/arvados_cwl/arvcontainer.py
+++ b/sdk/cwl/arvados_cwl/arvcontainer.py
@@ -250,6 +250,15 @@ class ArvadosContainer(JobBase):
         if self.timelimit is not None:
             scheduling_parameters["max_run_time"] = self.timelimit
 
+        extra_submit_params = {}
+        cluster_target_req, _ = self.get_requirement("http://arvados.org/cwl#ClusterTarget")
+        if cluster_target_req:
+            cluster_id = cluster_target_req.get("clusterID")
+            if cluster_id:
+                extra_submit_params["cluster_id"] = cluster_id
+            if cluster_target_req.get("ownerUUID"):
+                container_request["owner_uuid"] = cluster_target_req.get("ownerUUID")
+
         container_request["output_name"] = "Output for step %s" % (self.name)
         container_request["output_ttl"] = self.output_ttl
         container_request["mounts"] = mounts
@@ -277,11 +286,13 @@ class ArvadosContainer(JobBase):
             if runtimeContext.submit_request_uuid:
                 response = self.arvrunner.api.container_requests().update(
                     uuid=runtimeContext.submit_request_uuid,
-                    body=container_request
+                    body=container_request,
+                    **extra_submit_params
                 ).execute(num_retries=self.arvrunner.num_retries)
             else:
                 response = self.arvrunner.api.container_requests().create(
-                    body=container_request
+                    body=container_request,
+                    **extra_submit_params
                 ).execute(num_retries=self.arvrunner.num_retries)
 
             self.uuid = response["uuid"]

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