The first thing to check is if cluster communication is happy, for that we use corosync-cfgtool.

We can see here that everything appears normal with our fixed IP address, not a 127.0.0.x loopback address, listed as the id and no faults for the status.

If you see something different, you might want to start by checking the node’s network, firewall and selinux configurations.

Next we check the membership and quorum APIs:

All good!