Hi, you probably have empty OSD nodes in your crush tree. Can you send the output of 'ceph osd tree'? Thanks, Eugen Zitat von Jan Kasprzak <kas@fi.muni.cz>:

Hello, Ceph users!

I have recently noticed that when I reboot a single ceph node, ceph -s reports "5 hosts down" instead of one. The following is captured during reboot of a node with two OSDs:

health: HEALTH_WARN noout flag(s) set 2 osds down 5 hosts (2 osds) down [...] mon: 3 daemons, quorum mon1,mon3,mon2 (age 8h) mgr: mon2(active, since 2d), standbys: mon3, mon1 osd: 34 osds: 32 up (since 2m), 34 in (since 4M) flags noout rgw: 1 daemon active (1 hosts, 1 zones)

After the node successfully reboots, ceph -s reports "HEALTH OK" and of course no OSDs and no hosts are reported as being down.

Does anybody else see this as well? This is Ceph 18.2.1, but I think I have seen this on Ceph 17 as well.

Thanks,

-Yenya

-- | Jan "Yenya" Kasprzak <kas at {fi.muni.cz - work | yenya.net - private}> | | https://www.fi.muni.cz/~kas/ GPG: 4096R/A45477D5 | We all agree on the necessity of compromise. We just can't agree on when it's necessary to compromise. --Larry Wall _______________________________________________ ceph-users mailing list -- ceph-users@ceph.io To unsubscribe send an email to ceph-users-leave@ceph.io