Hi Nigel, https://github.com/ceph/ceph-ansible/tree/master/infrastructure-playbooks the shrink-mon.yml and add-mon.yml playbooks may give you some insights for such operations. (remember to check out the correct Ceph version first) ------------------ Original ------------------ From: "Nigel Williams"<nigel.williams@xxxxxxxxxxx>; Date: Wed, Mar 30, 2022 12:25 PM To: "ceph-users"<ceph-users@xxxxxxx>; Subject: replace MON server keeping identity (Octopus) This is a ceph-deploy setup. I would welcome suggestions as to how to replace a server hosting a MON; none of the following have worked for me: This fails: 1. Setup new server and copy MONMAP/keys to new server. 2. Shutdown old server (cluster out of quorum) 2. Change new server identity(IP, hostname) to match old server, reboot 3. ceph-mon -i cnx-10 --mkfs --monmap MONMAP.out --keyring MON.keyring 4. reboot 5. Log fills up with cephx server client.admin: unexpected key AND this fails: 1. add new server as new MON, joins quorum 2. shutdown old server 3. change identity of new server to match old, reboot 4. Log fills with mon.cnx-10@0(electing) e5 collect_metadata : no unique device id for : fallback method has no model nor serial' mon.cnx-10@0(electing) e5 handle_auth_request failed to assign global_id AND this fails: 1. Shutdown old server 2. Change new server identity to match old server 3. ceph-deploy --overwrite-conf mon create cnx-10 New server never joins existing quorum. Thanks for any ideas. I would like to retain identity (IP address) of the original server as it is embedded in many client systems. _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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