It looks like the main problem was that I needed to add
pghost="/var/run/postgresql" to the postgresql-10-main resource. I'm not sure
why I have to do that, but it makes things work.
For both this and my last E-mail to the list that was also a problem with the
command being run to start the instance up, I'd like to understand how to
diagnose what's happening better myself instead of resorting to guesswork.
How can I tell exactly what the command is that Pacemaker ends up calling to
start PostgreSQL? I don't see it in corosync.log. If I could see exactly what
was being tried, I could try running it by hand and determine the problem
myself a lot more effectively.
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