[ClusterLabs] pacemaker&corosync services shutting off after the network cable is disconnected

[JT]

Chris, 
Thanks for trying this.  My experience has been with the cluster services running on VMs, when the cable to the hypervisor is pulled.  The hypervisor only had one VM with cluster services on it.  The remaining cluster nodes were on other VMs on other hypervisor, all on the same subnet.

I'm not sure if the nmcli command being run on the VM would reproduce the same effect? 

-John




On September 11, 2026 4:12:43 PM EDT, Chris Lumens <clumens at redhat.com> wrote:
>> pacemaker 2.1.9-1    On Rhel 9.6 - No problem with network isolation
>> pacemaker 2.1.10-2   On Rhel 9.8 - Problem I described
>I've been trying to reproduce this today, but so far no luck.  I had an idea which patch might be to blame, so maybe there's another patch at fault that I haven't tried yet.  Alternatively, perhaps there's something about how I am taking down the network on my VM (nmcli device down) that results in different behavior than how you are losing the network.
>
>- Chris
>
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