Hi Dan,
thanks for your reply. There is still a problem.
Firstly, I did indeed forget to restart the mon even though I looked at the help for mon_osd_down_out_subtree_limit and it says it requires a restart. Stupid me. Well, now I did a restart and it still doesn't work. Here is the situation:
# ceph config dump | grep subtree
mon advanced mon_osd_down_out_subtree_limit host *
mon advanced mon_osd_reporter_subtree_level datacenter
# ceph config get mon.ceph-01 mon_osd_down_out_subtree_limit
host
# ceph daemon mon.ceph-01 config get mon_osd_down_out_subtree_limit
{
"mon_osd_down_out_subtree_limit": "rack"
}
# ceph config show mon.ceph-01 | grep subtree
mon_osd_down_out_subtree_limit rack default mon
mon_osd_reporter_subtree_level datacenter mon
The default overrides the mon config database setting. What is going on here? I restarted all 3 monitors.
Best regards and thanks for your help,
=================
Frank Schilder
AIT Risø Campus
Bygning 109, rum S14
________________________________________
From: Dan van der Ster <dan@xxxxxxxxxxxxxx>
Sent: 14 July 2020 10:53:13
To: Frank Schilder
Cc: Anthony D'Atri; ceph-users
Subject: Re: Re: mon_osd_down_out_subtree_limit not working?
mon_osd_down_out_subtree_limit has been working well here. Did you
restart the mon's after making that config change?
Can you do this just to make sure it took effect?
ceph daemon mon.`hostname -s` config get mon_osd_down_out_subtree_limit
-- dan
On Tue, Jul 14, 2020 at 8:57 AM Frank Schilder <frans@xxxxxx> wrote:
>
> Yes. After the time-out of 600 secs the OSDs got marked down, all PGs got remapped and recovery/rebalancing started as usual. In the past, I did service on servers with the flag noout set and would expect that mon_osd_down_out_subtree_limit=host has the same effect when shutting down an entire host. Unfortunately, in my case these two settings behave differently.
>
> If I understand the documentation correctly, the OSDs should not get marked out automatically.
>
> Best regards,
> =================
> Frank Schilder
> AIT Risø Campus
> Bygning 109, rum S14
>
> ________________________________________
> From: Anthony D'Atri <anthony.datri@xxxxxxxxx>
> Sent: 14 July 2020 04:32:05
> To: Frank Schilder
> Subject: Re: mon_osd_down_out_subtree_limit not working?
>
> Did it start rebalancing?
>
> > On Jul 13, 2020, at 4:29 AM, Frank Schilder <frans@xxxxxx> wrote:
> >
> > if I shut down all OSDs on this host, these OSDs should not be marked out automatically after mon_osd_down_out_interval(=600) seconds. I did a test today and, unfortunately, the OSDs do get marked as out. Ceph status was showing 1 host down as expected.
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