Add a note about network interfaces changes

Author: priteau

doc/source/operations/rocky-linux-9.rst

@@ -242,6 +242,13 @@ Potential issues
 -  If you are using hyper-converged Ceph, please also note the potential issues
    in the Storage section below.
 
+-  Network interface names may change between CentOS Stream 8 and Rocky Linux
+   9, in which case you will need to update Kayobe configuration. Note that the
+   configuration should remain correct for hosts not yet migrated, otherwise
+   fact gathering may fail. For example, this can be done using ``host_vars``.
+   Once all hosts are migrated, the change can be moved to ``group_vars`` and
+   the temporary ``host_vars`` deleted.
+
 Full procedure for one host
 ---------------------------
 
@@ -367,7 +374,12 @@ The possible batches depend on a number of things:
 Potential issues
 ----------------
 
-Nothing yet!
+-  Network interface names may change between CentOS Stream 8 and Rocky Linux
+   9, in which case you will need to update Kayobe configuration. Note that the
+   configuration should remain correct for hosts not yet migrated, otherwise
+   fact gathering may fail. For example, this can be done using ``host_vars``.
+   Once all hosts are migrated, the change can be moved to ``group_vars`` and
+   the temporary ``host_vars`` deleted.
 
 Full procedure for one batch of hosts
 -------------------------------------
@@ -518,6 +530,13 @@ Potential issues
 -  Commands starting with ``ceph`` are all run on the cephadm bootstrap
    host in a cephadm shell unless stated otherwise.
 
+-  Network interface names may change between CentOS Stream 8 and Rocky Linux
+   9, in which case you will need to update Kayobe configuration. Note that the
+   configuration should remain correct for hosts not yet migrated, otherwise
+   fact gathering may fail. For example, this can be done using ``host_vars``.
+   Once all hosts are migrated, the change can be moved to ``group_vars`` and
+   the temporary ``host_vars`` deleted.
+
 Full procedure for any storage host
 -----------------------------------