[ARVADOS] updated: 1.3.0-2140-g8039b0a46

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Summary of changes:
 doc/admin/upgrading.html.textile.liquid | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

       via  8039b0a469df007a282f321bd8349d9e47461a79 (commit)
      from  a29c0ced4f679e1972488fd2d6074fa1de3bac8d (commit)

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commit 8039b0a469df007a282f321bd8349d9e47461a79
Author: Peter Amstutz <peter.amstutz at curii.com>
Date:   Fri Feb 7 11:36:53 2020 -0500

    Add note that some services require a minimal config.yml to start.
    
    no issue #
    
    Arvados-DCO-1.1-Signed-off-by: Peter Amstutz <peter.amstutz at curii.com>

diff --git a/doc/admin/upgrading.html.textile.liquid b/doc/admin/upgrading.html.textile.liquid
index b04c5cf42..23d712043 100644
--- a/doc/admin/upgrading.html.textile.liquid
+++ b/doc/admin/upgrading.html.textile.liquid
@@ -48,7 +48,17 @@ Arvados 2.0 is a major upgrade, with many changes.  Please read these upgrade no
 
 h3. Migrating to centralized config.yml
 
-See "Migrating Configuration":config-migration.html for notes on migrating legacy per-component configuration files to the new centralized @/etc/arvados/config.yml at .  To ensure a smooth transition, the per-component config files continue to be read, and take precedence over the centralized configuration.
+See "Migrating Configuration":config-migration.html for notes on migrating legacy per-component configuration files to the new centralized @/etc/arvados/config.yml at .
+
+To ensure a smooth transition, the per-component config files continue to be read, and take precedence over the centralized configuration.  Your cluster should continue to function after upgrade but before doing the full configuration migration.  However, several services (keepstore, keep-web, keepproxy) require a minimal `/etc/arvados/config.yml` to start:
+
+<pre>
+Clusters:
+  zzzzz:
+    Services:
+      Controller:
+        ExternalURL: "https://zzzzz.example.com"
+</pre>
 
 h3. Keep-balance configuration migration
 

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