Percona XtraDB Cluster - do I add arbiter IP in gcomm://? I'm configuring Percona XtraDB Cluster 8 on two nodes, and use a 3rd node to act as an arbiter.
I cannot make up out of the docs whether to add the IP of the arbiter in the galera nodes addresses of the arbiter’s configuration.
# A comma-separated list of node addresses (address[:port]) in the cluster
# GALERA_NODES=&quot;&quot;

Also, do I add the IP of the arbiter in the wsrep_clsuter_address of the Galera configuration? Again, it's not described in the docs.
wsrep_cluster_address=gcomm://...
While I too could not find a definite answer in the documentation, the following link states:
While Galera Arbitrator does not participate in replication, it does receive the same data as all other nodes.
Which leads me to believe that yes, you would have to add the Arbitrator IPs to all configuration files as if it were another node.
EDIT: This guide seems to indicate the same, although it is not official documentation.