From 8c195c0781856ee40813da40089e1d97c867e3e9 Mon Sep 17 00:00:00 2001 From: Patrick Donnelly Date: Wed, 14 Mar 2018 15:30:12 -0700 Subject: [PATCH] PendingReleaseNotes: add note about upgrading MDS Fixes: https://tracker.ceph.com/issues/23172 Signed-off-by: Patrick Donnelly (cherry picked from commit 9c809d3c58126694e577ade6d017e61a6c283411) Conflicts: PendingReleaseNotes: added section 12.2.5 with cephfs release notes --- PendingReleaseNotes | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/PendingReleaseNotes b/PendingReleaseNotes index ac6b2c0c67a2..6c70011721a2 100644 --- a/PendingReleaseNotes +++ b/PendingReleaseNotes @@ -54,3 +54,20 @@ and refuses to start as consistency and untrimmable cache issues may develop. The new option client_die_on_failed_dentry_invalidate (default: true) may be turned off to allow the client to proceed (dangerous!). + +12.2.5 +------ + +- *CephFS*: + + * Upgrading an MDS cluster to 12.2.3+ will result in all active MDS + exiting due to feature incompatibilities once an upgraded MDS comes online + (even as standby). Operators may ignore the error messages and continue + upgrading/restarting or follow this upgrade sequence: + + Reduce the number of ranks to 1 (`ceph fs set max_mds 1`), + deactivate all other ranks (`ceph mds deactivate :`), shutdown + standbys leaving the one active MDS, upgrade the single active MDS, then + upgrade/start standbys. Finally, restore the previous max_mds. + + See also: https://tracker.ceph.com/issues/23172 -- 2.47.3