We recently did an upgrade for our cluster nodes from Wheezy to Jessie.
To reduce possible problems with drbd we first updated the kernel to the
backport version, which is the same as the stable kernel in Jessie.
After that drbd versions matched while one node was on whezzy and one
node already was on Jessie.
While holding the cluster in maintenance we could safely upgrade the
second node and then going through the different configuration/syntax
changes from older corosync/pacemaker versions to the backport versions
from Jessie.
Since the version jump was big from corosync 1 & pacemaker 1.1.7 to
corosync 2 & pacemaker 1.1.15 there was quite some work dealing with
upgraded configurations but cluster works again as expected.
-Toni
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Am 22.11.2016 um 17:35 schrieb Jason A Ramsey:
Can anyone recommend a bulletproof process for OS patching a pacemaker
cluster that manages a drbd mirror (with LVM on top of the drbd and luns
defined for an iscsi target cluster if that matters)? Any time I’ve
tried to mess with the cluster, it seems like I manage to corrupt my
drbd filesystem, and now that I have actual data on the thing, that’s
kind of a scary proposition. Thanks in advance!
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*[ jR ]*
/there is no path to greatness; greatness is the path/
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