pod create --replace

Add a `--replace` flag to the `pod create` command.  If another pod with
the same name already exists, it will be replaced and removed.

Adding this flag is motivated by #5485 to make running Podman in systemd
units (or any other scripts/automation) more robust.  In case of a
crash, a pod may not be removed by a sytemd unit anymore.  The
`--replace` flag allows for supporting crashes.

Note that the `--replace` flag does not require the `--name` flag to be
set, so it can be set unconditionally in `podman generate systemd`.

Signed-off-by: Valentin Rothberg <rothberg@redhat.com>

1 files changed, 15 insertions, 0 deletions

diff --git a/test/e2e/pod_create_test.go b/test/e2e/pod_create_test.go
index a7d5783cb..8d07f6290 100644
--- a/test/e2e/pod_create_test.go
+++ b/test/e2e/pod_create_test.go
@@ -305,4 +305,19 @@ var _ = Describe("Podman pod create", func() {
 		data := check.InspectPodToJSON()
 		Expect(data.ID).To(Equal(string(id)))
 	})
+
+	It("podman pod create --replace", func() {
+		// Make sure we error out with --name.
+		session := podmanTest.Podman([]string{"pod", "create", "--replace", ALPINE, "/bin/sh"})
+		session.WaitWithDefaultTimeout()
+		Expect(session.ExitCode()).To(Equal(125))
+
+		// Create and replace 5 times in a row the "same" pod.
+		podName := "testCtr"
+		for i := 0; i < 5; i++ {
+			session = podmanTest.Podman([]string{"pod", "create", "--replace", "--name", podName})
+			session.WaitWithDefaultTimeout()
+			Expect(session.ExitCode()).To(Equal(0))
+		}
+	})
 })