On Wed, Jul 13, 2022 at 10:50 PM Reed Dier <reed.dier@xxxxxxxxxxx> wrote:
>
> Hoping this may be trivial to point me towards, but I typically keep a background screen running `rbd perf image iostat` that shows all of the rbd devices with io, and how busy that disk may be at any given moment.
>
> Recently after upgrading everything to latest octopus release (15.2.16), it no longer allows for not specifying the pool, which then means I can’t blend all rbd pools together into a single view.
> How it used to appear:
> > NAME WR RD WR_BYTES RD_BYTES WR_LAT RD_LAT
> > rbd-ssd/app1 322/s 0/s 5.6 MiB/s 0 B/s 2.28 ms 0.00 ns
> > rbd-ssd/app2 223/s 5/s 2.1 MiB/s 147 KiB/s 3.56 ms 1.12 ms
> > rbd-hybrid/app3 76/s 0/s 11 MiB/s 0 B/s 16.61 ms 0.00 ns
> > rbd-hybrid/app4 11/s 0/s 395 KiB/s 0 B/s 51.29 ms 0.00 ns
> > rbd-hybrid/app5 3/s 0/s 74 KiB/s 0 B/s 151.54 ms 0.00 ns
> > rbd-hybrid/app6 0/s 0/s 42 KiB/s 0 B/s 13.90 ms 0.00 ns
> > rbd-hybrid/app7 0/s 0/s 2.4 KiB/s 0 B/s 1.70 ms 0.00 ns
> >
> > NAME WR RD WR_BYTES RD_BYTES WR_LAT RD_LAT
> > rbd-ssd/app1 483/s 0/s 7.3 MiB/s 0 B/s 2.17 ms 0.00 ns
> > rbd-ssd/app2 279/s 5/s 2.5 MiB/s 69 KiB/s 3.82 ms 516.30 us
> > rbd-hybrid/app3 147/s 0/s 10 MiB/s 0 B/s 8.59 ms 0.00 ns
> > rbd-hybrid/app6 10/s 0/s 425 KiB/s 0 B/s 75.79 ms 0.00 ns
> > rbd-hybrid/app8 0/s 0/s 2.4 KiB/s 0 B/s 1.85 ms 0.00 ns
>
>
> > $ uname -r && rbd --version && rbd perf image iostat
> > 5.4.0-107-generic
> > ceph version 15.2.16 (d46a73d6d0a67a79558054a3a5a72cb561724974) octopus (stable)
> > rbd: mgr command failed: (2) No such file or directory: [errno 2] RADOS object not found (Pool 'rbd' not found)
>
> This is ubuntu 20.04, using packages rather than cephadm.
> I do not have a pool named `rbd` so that is correct, but I have a handful of pools with the rbd application set.
>
> > $ for pool in rbd-{ssd,hybrid,ec82} ; do ceph osd pool application get $pool ; done
> > {
> > "rbd": {}
> > }
> > {
> > "rbd": {}
> > }
> > {
> > "rbd": {}
> > }
>
> Looking at the help output, it doesn’t seem to imply that the `pool-spec` is optional, and it won’t take wildcard globs like `rbd*` for the pool name.
>
> > $ rbd help perf image iostat
> > usage: rbd perf image iostat [--pool <pool>] [--namespace <namespace>]
> > [--iterations <iterations>] [--sort-by <sort-by>]
> > [--format <format>] [--pretty-format]
> > <pool-spec>
> >
> > Display image IO statistics.
> >
> > Positional arguments
> > <pool-spec> pool specification
> > (example: <pool-name>[/<namespace>]
> >
> > Optional arguments
> > -p [ --pool ] arg pool name
> > --namespace arg namespace name
> > --iterations arg iterations of metric collection [> 0]
> > --sort-by arg (=write_ops) sort-by IO metric (write-ops, read-ops,
> > write-bytes, read-bytes, write-latency,
> > read-latency) [default: write-ops]
> > --format arg output format (plain, json, or xml) [default:
> > plain]
> > --pretty-format pretty formatting (json and xml)
>
> Setting a pool name to one of my rbd pools either as pool-spec or -p/—pool works, but obviously only for that pool, and not for *all* rbd pools, as it functioned previously, in what appears to have been 15.2.13 previously.
> I didn’t see a PR mentioned in the 5.2.14-16 release notes that seemed to mention changes to rbd that would affect this, but I could have glossed over something.
Hi Reed,
You have stumbled onto a regression:
https://tracker.ceph.com/issues/56561
I will address it ASAP and we should be able to include the fix in the
upcoming 15.2.17 release.
Thanks,
Ilya
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