This article describes the status of checkpoint/restore integration with containerd, and how to use it.
Container Checkpoint/Restore
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Note: ctr is unsupported debug and administrative client for interacting with the containerd daemon. The commands, options, and operations are not guaranteed to be backward compatible or stable from release to release of the containerd project.
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Pull "ubuntu:latest" image if not already available locally.
ctr image pull docker.io/library/ubuntu:latest
Create and run a container with ID "looper"
ctr run --runtime io.containerd.runc.v1 -d docker.io/library/ubuntu:latest looper /bin/sh -c 'i=0; while true; do echo $i; i=$(expr $i + 1); sleep 1; done'
Create container checkpoint
ctr c checkpoint --rw --task looper checkpoint/looper:20211011
Restore container from checkpoint
ctr c restore looper-1 checkpoint/looper:20211011