Re: cephadm orch thinks hosts are offline

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Hi Thomas,

What happens if you run "ceph cephadm check-host <hostname>" for one of the
hosts that is offline (and if that fails "ceph cephadm check-host
<hostname> <ip-addr>")? Usually, the hosts get marked offline when some ssh
connection to them fails. The check-host command will attempt a connection
and maybe let us see why it's failing, or, if there is no longer an issue
connecting to the host, should mark the host online again.

Thanks,
  - Adam King

On Thu, Jun 23, 2022 at 12:30 PM Thomas Roth <t.roth@xxxxxx> wrote:

> Hi all,
>
> found this bug https://tracker.ceph.com/issues/51629  (Octopus 15.2.13),
> reproduced it in Pacific and
> now again in Quincy:
> - new cluster
> - 3 mgr nodes
> - reboot active mgr node
> - (only in Quincy:) standby mgr node takes over, rebooted node becomse
> standby
> - `ceph orch host ls` shows all hosts as `offline`
> - add a new host: not offline
>
> In my setup, hostnames and IPs are well known, thus
>
> # ceph orch host ls
> HOST      ADDR         LABELS  STATUS
> lxbk0374  10.20.2.161  _admin  Offline
> lxbk0375  10.20.2.162          Offline
> lxbk0376  10.20.2.163          Offline
> lxbk0377  10.20.2.164          Offline
> lxbk0378  10.20.2.165          Offline
> lxfs416   10.20.2.178          Offline
> lxfs417   10.20.2.179          Offline
> lxfs418   10.20.2.222          Offline
> lxmds22   10.20.6.67
> lxmds23   10.20.6.72           Offline
> lxmds24   10.20.6.74           Offline
>
>
> (All lxbk are mon nodes, the first 3 are mgr, 'lxmds22' was added after
> the fatal reboot.)
>
>
> Does this matter at all?
> The old bug report is one year old, now with prio 'Low'. And some people
> must have rebooted the one or
> other host in their clusters...
>
> There is a cephfs on our cluster, operations seem to be unaffected.
>
>
> Cheers
> Thomas
>
> --
> --------------------------------------------------------------------
> Thomas Roth
> Department: Informationstechnologie
> Location: SB3 2.291
>
>
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