Changes

Beyond the straightforward case of checkpointing and restoring the same container, it's also possible to checkpoint one container, and then restore the checkpoint into a completely different container. Right now that is done with the <code>--force</code> option, in conjunction with the <code>--image-dir</code> option. Here's a slightly revised example from before:

Beyond the straightforward case of checkpointing and restoring the same container, it's also possible to checkpoint one container, and then restore the checkpoint into a completely different container. Right now that is done with the <code>--force</code> option, in conjunction with the <code>--image-dir</code> option. Here's a slightly revised example from before:

  $ docker run -d --name looper2 --security-opt seccomp:unconfined busybox /bin/sh -c 'i=0; while true; do echo $i; i=$(expr $i + 1); sleep 1; done'

  $ docker run -d --name looper2 --security-opt seccomp:unconfined busybox \

          /bin/sh -c 'i=0; while true; do echo $i; i=$(expr $i + 1); sleep 1; done'

   

   

  # wait a few seconds to give the container an opportunity to print a few lines, then

  # wait a few seconds to give the container an opportunity to print a few lines, then

  $ docker checkpoint --image-dir=/tmp/checkpoint1 looper2

  $ docker checkpoint --image-dir=/tmp/checkpoint1 looper2

   

   

  $ docker create --name looper-force --security-opt seccomp:unconfined busybox /bin/sh -c 'i=0; while true; do echo $i; i=$(expr $i + 1); sleep 1; done'

  $ docker create --name looper-force --security-opt seccomp:unconfined busybox \

          /bin/sh -c 'i=0; while true; do echo $i; i=$(expr $i + 1); sleep 1; done'

   

   

  $ docker restore --force=true --image-dir=/tmp/checkpoint1 looper-force

  $ docker restore --force=true --image-dir=/tmp/checkpoint1 looper-force