[Pacemaker] 2-node clusters, who's the master now.

[Christian Parpart]

Hey all,

regarding 2-node clusters for a single service (e.g. HAproxy, in my case),
when now one node goes down, by server crash, or cable unplugged,
how does the other still functioning node actually know, that this is
not a split brain and can take over?

I also wonder how keepalived tool is managing that, which is magically
working well so far,
but I'd like to migrate to pacemaker/corosync for the new services.

Many thanks,
Christian.
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