Now let's get down to business. You must configure the
firewalld daemon on your cluster nodes to allow cluster communication traffic among the cluster nodes. Add a firewall rule to allow UDP traffic on
5405, and reload the
firewalld daemon. In the following screenshot, you can see the commands used for
firewalld daemon reconfiguration to allow Corosync traffic:
The default Corosync cluster communication ports are
5405, on which the UDP protocol is used. The ports are configured in the
/etc/corosync/corosync.conf configuration file. If you want to change the default Corosync communication ports, ...