Ran the following for a fresh install.
yum install postgresql-server postgresql-contrib postgresql-setup initdb systemctl start postgresql
With standard config, no changes or anything.
Nov 02 10:33:17 xxx.org pg_ctl: LOG: could not bind IPv4 socket: Address already in use Nov 02 10:33:17 xxx.org pg_ctl: HINT: Is another postmaster already running on port 5432? If not, wait a few seconds and retry.
But it actually has binded to 127.0.0.1:5432 fine. I ran netstat -anp before postgres started and 5432 port isn't in use. After I started postgresl I can see it has binded to 5432 successfully.
netstat -anp | grep 5432 tcp 0 0 127.0.0.1:5432 0.0.0.0:* LISTEN 12421/postgres unix 2 [ ACC ] STREAM LISTENING 46516 12421/postgres /tmp/.s.PGSQL.5432 unix 2 [ ACC ] STREAM LISTENING 46514 12421/postgres /var/run/postgresql/.s.PGSQL.5432
I installed it on another identical server last week with the same image and it is perfectly fine. I compared the pg version and the /etc/hosts file and they are the same. I even copied the same postgres conf over and it still gave me the same problem. Postgresql is started and I can connect fine! just annoying that it is throwing up that message when it starts.