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== Container Checkpoint/Restore ==
== Container Checkpoint/Restore ==
{{Note|<code>ctr</code> 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.}}
Pull "ubuntu:latest" image if not already available locally.
Pull "ubuntu:latest" image if not already available locally.
ctr image pull docker.io/library/ubuntu:latest
ctr image pull docker.io/library/redis:alpine
Create and run a container with ID "looper"
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'
ctr run --runtime io.containerd.runc.v1 -d docker.io/library/redis:alpine redis
Create container checkpoint
Create container checkpoint
ctr c checkpoint --rw --task looper checkpoint/looper:20211011
ctr c checkpoint --rw --task redis checkpoint/redis:20211011
Restore container from checkpoint
Restore container from checkpoint
ctr c restore looper-1 checkpoint/looper:20211011
ctr c restore redis-debug checkpoint/redis:20211011