All,
I am trying to add a third peer to my gluster install. The first 2 nodes are running since many months and have gluster 3.10.3-1.
I recently installed the 3rd node and gluster 3.10.6-1. I was able to start the gluster daemon on it. After, I tried to add the peer from one of the 2 previous server (gluster peer probe IPADDRESS).
That first peer started the communication with the 3rd peer. At that point, peer status were messed up. Server 1 saw both other servers as connected. Server 2 only saw server 1 as connected and did not have server 3 as a peer. Server 3 only had server 1 as a peer and saw it as disconnected.
I also found errors in the gluster logs of server 3 that could not be done:
[2017-10-24 00:15:20.090462] E [name.c:262:af_inet_client_get_remote_sockaddr] 0-management: DNS resolution failed on host HOST3.DOMAIN.lan
I rebooted node 3 and now gluster does not even restart on that node. It keeps giving Name resolution problems. The 2 other nodes are active.
However, I can ping the 3 servers (one from each others) using their DNS names.
Any idea about what to look at?