Hi Melanie, On Mon, Sep 6, 2021 at 10:06 AM Desaive, Melanie <[email protected]> wrote: > When I execute "ceph mon_status --format json-pretty" from our > ceph-management VM, the correct mon nodes are returned. > > But when I execute "ceph daemon osd.xx config show | grep mon_host" on the > respective storage node the old mon node IPs are returned. > > I am now unsure, that if I change more mon nodes, the information known to > the OSDs could become invalid one after the other and we could run into heavy > problems?
"config show" is showing you the mon IPs read from the OSDs' ceph.conf, and is what is used to initially connect to the mons. After that, my understanding is that those IPs don't matter as the OSDs will use the IPs from the mons for further connections/communication. However, I'm not certain what happens if, for example, all of your mons were to go down for a period of time; do the OSDs use the last monmap for reconnecting to the mons or do they revert to using the configured mon IPs? At the very least, you should be fine to replace all of your mons and update each ceph.conf with the new info without needing to restart the OSDs. After that it may be wise to restart the OSDs to both update the configured mon IPs as well as test to make sure that they can reconnect to the new mons without issue in case of a future outage. Josh _______________________________________________ ceph-users mailing list -- [email protected] To unsubscribe send an email to [email protected]
