[PVE-User] rbd lock list -- how to track down to client?

Igor Podlesny pve-user at poige.ru
Tue Apr 30 14:29:49 CEST 2019


On Tue, 30 Apr 2019 at 18:50, Alwin Antreich <a.antreich at proxmox.com> wrote:
> On Tue, Apr 30, 2019 at 03:12:58PM +0700, Igor Podlesny wrote:
[...]
> > Obviously
> > won't
> > work -- if RBD's client is a running instance (aka process) of /usr/bin/kvm.
> True, with 'kubelet' I was mistakenly thinking about containers. ;)

I see but it was just an example of "rbd lock list" output.

> With normal operation a RBD image is used by the VM with the same ID in
> its name. So when the KVM process with the ID isn't running anymore on
> the client shown by 'rbd lock list'
> (eg. '/usr/bin/kvm -id 100 -name testVM' ...), then the lock should be
> old.
>
> And yes, with the qemu 'info block' you can verify if a kvm process is
> using the image, irregardless of the VMID. On a default Proxmox VE setup
> there is no other client besides KVM, that uses librbd to connect to the
> RBD images.

Thank you but still I think it's not any precise. As I explained:

> > Moreover, it might be the case that one did check with qemu monitor's
> > "info block" all the running instances and didn't find references to
> > image in question.
> > So I'm looking for bullet proof and better direct way to use info
> > given by "rbd lock list". Guesswork takes too much time and efforts.

If there's no direct way to find the client using "rbd lock list" info
-- it's a huge drawback.

And I'm curious to know what those numbers in the output are anyways. ;)

-- 
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