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

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>

1 files changed, 11 insertions, 0 deletions

diff --git a/test/e2e/checkpoint_test.go b/test/e2e/checkpoint_test.go
index bd9cdcb8d..d452a062b 100644
--- a/test/e2e/checkpoint_test.go
+++ b/test/e2e/checkpoint_test.go
@@ -376,9 +376,20 @@ var _ = Describe("Podman checkpoint", func() {
 		Expect(podmanTest.NumberOfContainersRunning()).To(Equal(1))
 		Expect(podmanTest.GetContainerStatus()).To(ContainSubstring("Up"))
 
+		// Restore container a second time with different name
+		result = podmanTest.Podman([]string{"container", "restore", "-i", "/tmp/checkpoint.tar.gz", "-n", "restore_again"})
+		result.WaitWithDefaultTimeout()
+
+		Expect(result.ExitCode()).To(Equal(0))
+		Expect(podmanTest.NumberOfContainersRunning()).To(Equal(2))
+		Expect(podmanTest.GetContainerStatus()).To(ContainSubstring("Up"))
+
 		result = podmanTest.Podman([]string{"rm", "-fa"})
 		result.WaitWithDefaultTimeout()
 		Expect(result.ExitCode()).To(Equal(0))
 		Expect(podmanTest.NumberOfContainersRunning()).To(Equal(0))
+
+		// Remove exported checkpoint
+		os.Remove("/tmp/checkpoint.tar.gz")
 	})
 })