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.
Appreciate any pointers.
Thanks,
Reed
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