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tutorial: add checkpoint/restore to tutorial

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Signed-off-by: Adrian Reber <areber@redhat.com>
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Adrian Reber
2018-09-19 17:11:17 +00:00
committed by Adrian Reber
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docs/tutorials/podman_tutorial.md
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@ -157,6 +157,28 @@ $ sudo podman top <container_id>
101 31889 31873 0 09:21 ? 00:00:00 nginx: worker process
```
### Checkpointing the container
Checkpointing a container stops the container while writing the state of all processes in the container to disk.
With this a container can later be restored and continue running at exactly the same point in time as the
checkpoint. This capability requires CRIU 3.11 or later installed on the system.
To checkpoint the container use:
```console
$ sudo podman container checkpoint <container_id>
```
### Restoring the container
Restoring a container is only possible for a previously checkpointed container. The restored container will
continue to run at exactly the same point in time it was checkpointed.
To restore the container use:
```console
$ sudo podman container restore <container_id>
```
After being restored, the container will answer requests again as it did before checkpointing.
```console
# curl http://<IP_address>:8080
```
### Stopping the container
To stop the httpd container:
```console