Hi all,
Just want to (double) check something – we’re in the process of luminous ->
mimic upgrades for all of our clusters – particularly this section regarding
MDS steps
• Confirm that only one MDS is online and is rank 0 for your FS:
# ceph status
• Upgrade the last remaining MDS daemon by installing the new packages
and restarting the daemon:
Namely – is it required to upgrade the live single MDS in place (and thus have
downtime whilst the MDS restarts – on our first cluster was typically 10
minutes of downtime ) – or can we upgrade the standby-replays/standbys first
and flip once they are back?
Thanks in advance for any input
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