This article describes the status of checkpoint/restore integration with containerd, and how to use it.
Container Checkpoint/Restore
Create a container with ID "looper" based on the "ubuntu:latest" image.
ctr run -d docker.io/library/ubuntu:latest looper /bin/sh -c 'i=0; while true; do echo $i; i=$(expr $i + 1); sleep 1; done'
ctr task kill -s KILL looper ctr task rm looperc
ctr containers rm looper