Hi
I am not sure how split brain works in ovirt. In other cluster solutions
you can have an even number of nodes such as 4, 6 , 8 etc. All nodes writes
to quorum disk, say we have four nodes if one node goes down the other
three will vote
node 1 says I see node 2 and 3 but not 4
node 2 says I see node 1 and 3 but not 4
node 3 says I see node 1 and 2 but not 4
So all three votes node 4 must leave the cluster and the split brain is
solved
On Tue, Mar 5, 2024 at 10:58 AM Youssef Khristo <
youssef.khristo(a)elsewedyintel.com> wrote:
The split-brain explanation makes a lot of sense, so I changed the HE
VM
deployed hosts from 6 to 5, as well as set an Affinity Group with soft VM
to Hosts enforcement for the other VMs (since HE is managed separately) for
5 hosts, with a similar Affinity Label, and I ran a test where I perform
outstanding upgrades from the Administration Portal on any host (where I
chose that the host be rebooted), the host is moved to maintenance, updates
are installed and host is rebooted, I still get the same issue where the
entire cluster with every single VM including HE goes down. Is there an
additional configuration that needs to be set/tweaked for the cluster not
to fail?
Thank you and best regards
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