Re: lvm commands hanging when run from inside a kubernetes pod

On Mon, Jun 06, 2022 at 11:19:47AM +0530, Abhishek Agarwal wrote:
> 1. Yes, use_lvmetad is 0, and its systemd units for it are stopped/disabled.
> 2. Yes, everything on the host machine i.e(/proc, /sys etc) are getting
> mounted on the pod.
> 
> *ubuntu@ip-172-31-89-47*:*~*$ kubectl exec -it openebs-lvm-node-v6jrb -c
> openebs-lvm-plugin  -n kube-system -- sh
> 
> # ls
> 
> bin  boot  dev etc  home  host  lib  lib32  lib64  libx32  media  mnt opt
> plugin  proc  root  run  sbin  srv  sys  tmp  usr var
> 
> # cd /host
> 
> # ls
> 
> bin  boot  dev etc  home  lib lib32  lib64  libx32  lost+found  media  mnt
> opt  proc  root  run  sbin  snap srv  sys  tmp  usr  var
> 
> #
> 3. The detail output of `strace -f -ttt` command:
> https://pastebin.com/raw/VFyXLNaC

I suggest bind-mounting the host’s D-Bus socket into the container and
using systemd’s D-Bus API to run the LVM commands on the host.  This
will avoid the problems you are having.
-- 
Sincerely,
Demi Marie Obenour (she/her/hers)
Invisible Things Lab

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