How can I locate the container that is using too much IO by PID?

LXD
1

ubuntu 18.04
zfs
LXD 3.18
I am trying to track down which specific containers are using high disk i/o. By using iotop, I get the PID 1473 which is responsible for high IO usage.
ps fauxww |grep 1473
root 1473 0.0 0.0 0 0 ? S Nov19 0:56 _ [txg_sync]
ps fauxww| grep 754
root 754 0.0 0.0 0 0 ? S Nov19 0:05 _ [jbd2/vdb-8]
1000000 32754 0.0 0.0 1568 0 pts/5 Ss+ Nov22 0:00 _ /sbin/getty 38400 console
ps fauxww| grep 8437
1000000 8437 0.0 0.0 15936 836 ? Ss Dec06 0:05 _ snapfuse /var/lib/snapd/snaps/snapd_5643.snap /snap/snapd/5643 -o ro,nodev,allow_other,suid

cat /proc/PID/cgroup
cat: /proc/PID/cgroup: No such file or directory

How can I locate the container that is using too much IO by PID?

2

Usually running ps fauxww will get you a nice process tree which then lets you track down the parent lxc process giving you the container name.

3

It works， thank you.