Merge branch '17726-singularity-doc' into main

[arvados.git] / doc / admin / upgrading.html.textile.liquid

diff --git a/doc/admin/upgrading.html.textile.liquid b/doc/admin/upgrading.html.textile.liquid
index 19f8c4e849d03c945924f23aae89a5ba2aa02fec..8435e2871f882fd6588b709711182443dcc8f2f3 100644 (file)
--- a/doc/admin/upgrading.html.textile.liquid
+++ b/doc/admin/upgrading.html.textile.liquid
@@ -39,6 +39,10 @@ h2(#main). development main (as of 2021-07-15)
 
 "Upgrading from 2.2.0":#v2_2_0
 
+h3. Storage classes must be defined explicitly
+
+If your configuration uses the StorageClasses attribute on any Keep volumes, you must add a new @StorageClasses@ section that lists all of your storage classes. Refer to the updated documentation about "configuring storage classes":{{site.baseurl}}/admin/storage-classes.html for details.
+
 h3. keep-balance requires access to PostgreSQL
 
 Make sure the keep-balance process can connect to your PostgreSQL server using the settings in your config file. (In previous versions, keep-balance accessed the database through controller instead of connecting to the database server directly.)