Hi:
I can take this task.
From: Sage Weil <sweil@xxxxxxxxxx>
Date: Tue, May 10, 2016 at 8:11 PM
Subject: Re: "1 hosts down" health warning?
To: Wido den Hollander <wido@xxxxxxxx>
Cc: ceph-devel@xxxxxxxxxxxxxxx
On Tue, 10 May 2016, Wido den Hollander wrote:
> > Op 9 mei 2016 om 18:36 schreef Sage Weil <sweil@xxxxxxxxxx>:
> >
> >
> > We have a feature (mon_osd_reporter_subtree_level = host) that makes it so
> > that if an entire host is down (or whatever the configured hierarchy
> > level is) the osds aren't automatically marked out after 5 minutes.
> >
> > This is confusing on an actual cluster because you see something like
> >
> > 48/5661 in osds are down
> >
> > bit it never clears. It's not until you look at the ceph osd tree output
> > that you can see why they aren't getting marked out.
> >
> > It would be great if the health warning said something like
> >
> > 48/5661 in osds are down
> > 1/142 hosts are down (accounting for 48/48 down osds)
> >
> > and the health detail said something like
> >
> > host foo is down with 48 OSDs
> >
> > I think this would be pretty easy to implement given the mon is
> > already doing the subtree-based checks.
> >
> > Thoughts? Any takers?
>
> Seems like a good thing to have. I wouldn't say 'host', since
> 'mon_osd_reporter_subtree_level' could be set to rack or row if you want
> to.
>
> Maybe:
>
> 480/6720 in osds are down
> 1/14 of CRUSH type 'rack' are down (accounting for 480/480 down osds)
Yeah. I was thinking it'd be
1/14 ${type}s are down (accounting for 480/480 down osds)
e.g.,
1/14 racks are down (accounting for 480/480 down osds)
just because concise is usually better.
sage
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