[ARVADOS] updated: 2.4.0-12-g1b2a8aedb

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Summary of changes:
 .../install-dispatch-cloud.html.textile.liquid           | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

       via  1b2a8aedb4081d34540c9864631230bf120540dc (commit)
       via  88ec870057d048ccde511a1b84e577d84711fc05 (commit)
      from  de3df01f392c72f589b3e29f0080da437d19a011 (commit)

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commit 1b2a8aedb4081d34540c9864631230bf120540dc
Author: Ward Vandewege <ward at curii.com>
Date:   Mon Apr 25 16:32:52 2022 -0400

    19054: more doc changes.
    
    Arvados-DCO-1.1-Signed-off-by: Ward Vandewege <ward at curii.com>

diff --git a/doc/install/crunch2-cloud/install-dispatch-cloud.html.textile.liquid b/doc/install/crunch2-cloud/install-dispatch-cloud.html.textile.liquid
index 3efd49fd1..2a7e10590 100644
--- a/doc/install/crunch2-cloud/install-dispatch-cloud.html.textile.liquid
+++ b/doc/install/crunch2-cloud/install-dispatch-cloud.html.textile.liquid
@@ -101,7 +101,9 @@ When @Containers/LocalKeepBlobBuffersPerVCPU@ is non-zero, the compute node will
 
 If the AWS credentials for S3 access are configured in @config.yml@ (i.e. @Volumes/DriverParameters/AccessKeyID@ and @Volumes/DriverParameters/SecretAccessKey@), these credentials will be made available to the local Keepstore on the compute node to access S3 directly and no further configuration is necessary.
 
-Alternatively, if an IAM role is configured in @config.yml@ (i.e. @Volumes/DriverParameters/IAMRole@), this role (or an equivalent role) needs be configured in the @CloudVMs/DriverParameters/IAMInstanceProfile@ parameter. That way, @arvados-dispatch-cloud@ can attach the appropriate instance profile to the compute node as it starts up and make the role available to the compute node.
+Alternatively, if an IAM role is configured in @config.yml@ (i.e. @Volumes/DriverParameters/IAMRole@), the name of an instance profile that corresponds to this role ("often identical to the name of the IAM role":https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/iam-roles-for-amazon-ec2.html#ec2-instance-profile) must be configured in the @CloudVMs/DriverParameters/IAMInstanceProfile@ parameter.
+
+Finally, if @config.yml@ does not have @Volumes/DriverParameters/AccessKeyID@, @Volumes/DriverParameters/SecretAccessKey@ or @Volumes/DriverParameters/IAMRole@ defined, Keepstore uses the IAM role attached to the node, whatever it may be called. The @CloudVMs/DriverParameters/IAMInstanceProfile@ parameter must then still be configured with the name of a profile whose IAM role has permission to access the S3 bucket(s). That way, @arvados-dispatch-cloud@ can attach the IAM role to the compute node as it is created.
 
 h3. Minimal configuration example for Amazon EC2
 

commit 88ec870057d048ccde511a1b84e577d84711fc05
Author: Ward Vandewege <ward at curii.com>
Date:   Mon Apr 25 16:13:38 2022 -0400

    19054: doc update
    
    Arvados-DCO-1.1-Signed-off-by: Ward Vandewege <ward at curii.com>

diff --git a/doc/install/crunch2-cloud/install-dispatch-cloud.html.textile.liquid b/doc/install/crunch2-cloud/install-dispatch-cloud.html.textile.liquid
index 0ed7a599f..3efd49fd1 100644
--- a/doc/install/crunch2-cloud/install-dispatch-cloud.html.textile.liquid
+++ b/doc/install/crunch2-cloud/install-dispatch-cloud.html.textile.liquid
@@ -74,7 +74,7 @@ Add or update the following portions of your cluster configuration file, @config
 </code></pre>
 </notextile>
 
-h4(#GPUsupport). NVIDIA GPU support
+h3(#GPUsupport). NVIDIA GPU support
 
 To specify instance types with NVIDIA GPUs, you must include an additional @CUDA@ section:
 
@@ -95,7 +95,15 @@ To specify instance types with NVIDIA GPUs, you must include an additional @CUDA
 
 The @DriverVersion@ is the version of the CUDA toolkit installed in your compute image (in X.Y format, do not include the patchlevel).  The @HardwareCapability@ is the CUDA compute capability of the GPUs available for this instance type.  The @DeviceCount@ is the number of GPU cores available for this instance type.
 
-h4. Minimal configuration example for Amazon EC2
+h3. AWS Credentials for Local Keepstore on Compute node
+
+When @Containers/LocalKeepBlobBuffersPerVCPU@ is non-zero, the compute node will spin up a local Keepstore service for faster storage access. If Keep is backed by S3, the compute node will need to be able to access the S3 bucket.
+
+If the AWS credentials for S3 access are configured in @config.yml@ (i.e. @Volumes/DriverParameters/AccessKeyID@ and @Volumes/DriverParameters/SecretAccessKey@), these credentials will be made available to the local Keepstore on the compute node to access S3 directly and no further configuration is necessary.
+
+Alternatively, if an IAM role is configured in @config.yml@ (i.e. @Volumes/DriverParameters/IAMRole@), this role (or an equivalent role) needs be configured in the @CloudVMs/DriverParameters/IAMInstanceProfile@ parameter. That way, @arvados-dispatch-cloud@ can attach the appropriate instance profile to the compute node as it starts up and make the role available to the compute node.
+
+h3. Minimal configuration example for Amazon EC2
 
 The <span class="userinput">ImageID</span> value is the compute node image that was built in "the previous section":install-compute-node.html#aws.
 
@@ -146,7 +154,7 @@ Example policy for the IAM role used by the cloud dispatcher:
 </pre>
 </notextile>
 
-h4. Minimal configuration example for Azure
+h3. Minimal configuration example for Azure
 
 Using managed disks:
 

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