Hi All, I've tried adding 2 monitors to a 3 nodes cluster with 1 monitor, 1 MGR and 1 MDS. The cluster was at CLEAN state when it just had 1 monitor.
# ceph status cluster: id: 46a122a0-8670-4935-b644-399e744c1c03 health: HEALTH_OK services: mon: 1 daemons, quorum lingcod mgr: lingcod(active) mds: NIO-1/1/1 up {0=lingcod=up:active} osd: 18 osds: 18 up, 18 in data: pools: 4 pools, 1700 pgs objects: 77489 objects, 301 GB usage: 906 GB used, 112 TB / 113 TB avail pgs: 1700 active+clean I've done the following on the second node in the cluster trying to add a monitor, but things went wrong, and now the cluster is frozen, I can't even query the cluster status. >From the node I wanted to add it as a monitor, I issued the following commands: # scp -p ${initial_monitor_ip}:/etc/ceph/ceph.client.admin.keyring /etc/ceph/ # ceph-authtool --create-keyring /etc/ceph/${cluster_name}.mon.keyring --gen-key -n mon. --cap mon 'allow *' # ceph-authtool /etc/ceph/${cluster_name}.mon.keyring --import-keyring /etc/ceph/${cluster_name}.client.admin.keyring # ceph auth caps client.admin osd 'allow *' mds 'allow *' mon 'allow *' mgr 'allow *' # monmaptool --create --add ${hostname} ${ip_address} --fsid ${uuid} /etc/ceph/monmap # mkdir /var/lib/ceph/mon/${cluster_name}-${hostname} # chown -R ceph:ceph /var/lib/ceph/mon/${cluster_name}-${hostname} # chmod +r /etc/ceph/${cluster_name}.mon.keyring # chmod +r /etc/ceph/monmap # sudo -u ceph ceph-mon --cluster ${cluster_name} --mkfs -i ${hostname} --monmap /etc/ceph/monmap --keyring /etc/ceph/${cluster_name}.mon.keyring --fsid ${uuid} # touch /var/lib/ceph/mon/${cluster_name}-${hostname}/done # systemctl start ceph-mon@${hostname} # ceph daemon mon.taulog add_bootstrap_peer_hint lingcod Then, when I found that the cluster was still reporting 1 monitor, I issued the following commands on the first monitor node. # ceph mon add taulog ${taulog_IP} Regards, Bishoy
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