From 9c809d3c58126694e577ade6d017e61a6c283411 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 --- PendingReleaseNotes | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/PendingReleaseNotes b/PendingReleaseNotes index 9608427b034bc..83c1d8114d1ce 100644 --- a/PendingReleaseNotes +++ b/PendingReleaseNotes @@ -3,6 +3,18 @@ * *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 + * Several "ceph mds" commands have been obsoleted and replaced by equivalent "ceph fs" commands: - mds dump -> fs dump -- 2.39.5