[ClusterLabs] Fence node when network interface goes down

[Andrei Borzenkov]

On Mon, Nov 15, 2021 at 3:32 PM S Rogers <sa.rogers1342 at gmail.com> wrote:
>>
>> The only solution here - as long as fencing node on external
>> connectivity loss is acceptable - is modifying ethmonitor RA to fail
>> monitor operation in this case.
>
> I was hoping to find a way to achieve the desired outcome without resorting to a custom RA, but it does appear to be the only solution.
>

Well, looking at it from a different angle - you could use the knet
nozzle interface for replication which means your postgres
connectivity is guaranteed to be the same as pacemaker/corosync
connectivity.