A simple restart seems to have broken ceph function, it now shows the computer I restarted as down for ceph, despite a green tick in the proxmox datacenter indicating it is active, ceph shows "
HEALTH_WARN: 1/3 mons down, quorum pve-5,pve-3
mon.pve-2 (rank 2) addr [v2:172.16.189.0:3300/0,v1:172.16.189.0:6789/0] is down (out of quorum)"
HEALTH_WARN: 1/3 mons down, quorum pve-5,pve-3
mon.pve-2 (rank 2) addr [v2:172.16.189.0:3300/0,v1:172.16.189.0:6789/0] is down (out of quorum)"