Now when Galera node can not join the cluster becuase of some problem with certificates we get just this kind of error messages:
It would be useful to get more detailed explanation about the problem. All elements of certificates must be checked and if one element fails (wrong CN, something else, in root or in one of intermediate certificates, etc), it must be reported what it is.
This would help a lot in troubleshooting.
As a side note, it would be useful to get node names and not their resolved IP-addresses in the messages.