Mention the 'Rendezvous' parameter on Keepstore's InternalURLs, for

[arvados.git] / doc / admin / config-migration.html.textile.liquid

diff --git a/doc/admin/config-migration.html.textile.liquid b/doc/admin/config-migration.html.textile.liquid
index c1b1b3a7bdced945211b3f273d5a2e5a8d1d79e7..a1f7872df4bff34e520d26c2f33680fdaec031a6 100644 (file)
--- a/doc/admin/config-migration.html.textile.liquid
+++ b/doc/admin/config-migration.html.textile.liquid
@@ -1,7 +1,7 @@
 ---
 layout: default
 navsection: installguide
-title: Migrating Configuration from v1.4 to v1.5
+title: Migrating Configuration from v1.4 to v2.0
 ...
 
 {% comment %}
@@ -11,10 +11,10 @@ SPDX-License-Identifier: CC-BY-SA-3.0
 {% endcomment %}
 
 {% include 'notebox_begin_warning' %}
-_New installations of Arvados 1.5+ can skip this section_
+_New installations of Arvados 2.0+ can skip this section_
 {% include 'notebox_end' %}
 
-Arvados 1.5 migrates to a centralized configuration file for all components.  The centralized Arvados configuration is @/etc/arvados/config.yml@.  Components that support the new centralized configuration are listed below.  During the migration period, legacy configuration files are still loaded and take precedence over the centralized configuration file.
+Arvados 2.0 migrates to a centralized configuration file for all components.  The centralized Arvados configuration is @/etc/arvados/config.yml@.  Components that support the new centralized configuration are listed below.  During the migration period, legacy configuration files are still loaded and take precedence over the centralized configuration file.
 
 h2. API server
 
@@ -70,12 +70,28 @@ To migrate a component configuration, do this on each node that runs an Arvados
 # After applying changes, re-run @arvados-server config-check@ again to check for additional warnings and recommendations.
 # When you are satisfied, delete the legacy config file, restart the service, and check its startup logs.
 # Copy the updated @config.yml@ file to your next node, and repeat the process there.
+# When you have a @config.yml@ file that includes all volumes on all keepstores, it is important to add a 'Rendezvous' parameter to the InternalURLs entries to make sure the old volume identifiers line up with the new config. If you don't do this, @keep-balance@ will want to shuffle all the existing data around to match the new volume order. The 'Rendezvous' value should be the last 15 characters of the keepstore's UUID in the old configuration. Here's an example:
+
+<notextile>
+<pre><code>Clusters:
+  xxxxx:
+    Services:
+      Keepstore:
+        InternalURLs:
+          "http://keep1.xxxxx.arvadosapi.com:25107": {Rendezvous: "eim6eefaibesh3i"}
+          "http://keep2.xxxxx.arvadosapi.com:25107": {Rendezvous: "yequoodalai7ahg"}
+          "http://keep3.xxxxx.arvadosapi.com:25107": {Rendezvous: "eipheho6re1shou"}
+          "http://keep4.xxxxx.arvadosapi.com:25107": {Rendezvous: "ahk7chahthae3oo"}
+</code></pre>
+</notextile>
+
+In this example, the keepstore with the name `keep1` had the uuid `xxxxx-bi6l4-eim6eefaibesh3i` in the old configuration.
 
 After migrating and removing all legacy config files, make sure the @/etc/arvados/config.yml@ file is identical across all system nodes -- API server, keepstore, etc. -- and restart all services to make sure they are using the latest configuration.
 
 h2. Cloud installations only: node manager
 
-Node manager is deprecated and replaced by @arvados-dispatch-cloud@.  No automated config migration is available.  Follow the instructions to "install the cloud dispatcher":../install/install-dispatch-cloud.html
+Node manager is deprecated and replaced by @arvados-dispatch-cloud@.  No automated config migration is available.  Follow the instructions to "install the cloud dispatcher":../install/crunch2-cloud/install-dispatch-cloud.html
 
 *Only one dispatch process should be running at a time.* If you are migrating a system that currently runs Node manager and @crunch-dispatch-slurm@, it is safest to remove the @crunch-dispatch-slurm@ service entirely before installing @arvados-dispatch-cloud@.