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migration: add possibility to restore a container with a new name

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The option to restore a container from an external checkpoint archive
(podman container restore -i /tmp/checkpoint.tar.gz) restores a
container with the same name and same ID as id had before checkpointing.

This commit adds the option '--name,-n' to 'podman container restore'.
With this option the restored container gets the name specified after
'--name,-n' and a new ID. This way it is possible to restore one
container multiple times.

If a container is restored with a new name Podman will not try to
request the same IP address for the container as it had during
checkpointing. This implicitly assumes that if a container is restored
from a checkpoint archive with a different name, that it will be
restored multiple times and restoring a container multiple times with
the same IP address will fail as each IP address can only be used once.

Signed-off-by: Adrian Reber <areber@redhat.com>
This commit is contained in:
Adrian Reber
2019-03-14 07:57:16 +00:00
parent 0e072f9a97
commit bef83c42ea
10 changed files with 93 additions and 4 deletions
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4
libpod/container_api.go
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@ -820,6 +820,10 @@ type ContainerCheckpointOptions struct {
// Import tells the API to read the checkpoint image from
// the filename set in TargetFile
TargetFile string
// Name tells the API that during restore from an exported
// checkpoint archive a new name should be used for the
// restored container
Name string
}
// Checkpoint checkpoints a container