Don't rename pod if container has the same name

We enforce the naming scheme "<podname>-<containername>" here [1].
Therefore we must not rename the pod in case of a naming conflict
between pod name and container name. Not renaming the pod increases the
usability for the user and easies scripting based on the name. Otherwise
a user must set some label to reliable find a pod after creation. Or
have to implement the renaming logic in the script.

[1] https://github.com/containers/podman/blob/main/pkg/specgen/generate/kube/kube.go#L140

Fixes #12722

Signed-off-by: Christoph Petrausch <chrobbert@gmail.com>

pkg/domain/infra/abi/play.go

@@ -178,17 +178,10 @@ func (ic *ContainerEngine) playKubePod(ctx context.Context, podName string, podY
 		return nil, err
 	}
 
-	// check for name collision between pod and container
+	// Assert the pod has a name
 	if podName == "" {
 		return nil, errors.Errorf("pod does not have a name")
 	}
-	for _, n := range podYAML.Spec.Containers {
-		if n.Name == podName {
-			playKubePod.Logs = append(playKubePod.Logs,
-				fmt.Sprintf("a container exists with the same name (%q) as the pod in your YAML file; changing pod name to %s_pod\n", podName, podName))
-			podName = fmt.Sprintf("%s_pod", podName)
-		}
-	}
 
 	podOpt := entities.PodCreateOptions{Infra: true, Net: &entities.NetOptions{NoHosts: options.NoHosts}}
 	podOpt, err = kube.ToPodOpt(ctx, podName, podOpt, podYAML)

test/e2e/play_kube_test.go

@@ -37,6 +37,31 @@ metadata:
 spec:
   hostname: unknown
 `
+
+var podnameEqualsContainerNameYaml = `
+apiVersion: v1
+kind: Pod
+metadata:
+  name: podnameEqualsContainerNameYaml
+spec:
+  containers:
+  - name: podnameEqualsContainerNameYaml
+    image: quay.io/libpod/alpine:latest
+    ports:
+    - containerPort: 80
+`
+
+var podWithoutAName = `
+apiVersion: v1
+kind: Pod
+spec:
+  containers:
+  - name: podDoesntHaveAName
+    image: quay.io/libpod/alpine:latest
+    ports:
+    - containerPort: 80
+`
+
 var checkInfraImagePodYaml = `
 apiVersion: v1
 kind: Pod
@@ -1278,6 +1303,39 @@ var _ = Describe("Podman play kube", func() {
 		Expect(sharednamespaces).To(ContainSubstring("pid"))
 	})
 
+	It("podman play kube should not rename pod if container in pod has same name", func() {
+		err := writeYaml(podnameEqualsContainerNameYaml, kubeYaml)
+		Expect(err).To(BeNil())
+
+		kube := podmanTest.Podman([]string{"play", "kube", kubeYaml})
+		kube.WaitWithDefaultTimeout()
+		Expect(kube).Should(Exit(0))
+
+		testPodCreated := podmanTest.Podman([]string{"pod", "exists", "podnameEqualsContainerNameYaml"})
+		testPodCreated.WaitWithDefaultTimeout()
+		Expect(testPodCreated).Should(Exit(0))
+
+		inspect := podmanTest.Podman([]string{"inspect", "podnameEqualsContainerNameYaml"})
+		inspect.WaitWithDefaultTimeout()
+		podInspect := inspect.InspectPodArrToJSON()
+		Expect(podInspect).Should(HaveLen(1))
+		var containerNames []string
+		for _, container := range podInspect[0].Containers {
+			containerNames = append(containerNames, container.Name)
+		}
+		Expect(containerNames).To(ContainElement("podnameEqualsContainerNameYaml-podnameEqualsContainerNameYaml"))
+	})
+
+	It("podman play kube should error if pod dont have a name", func() {
+		err := writeYaml(podWithoutAName, kubeYaml)
+		Expect(err).To(BeNil())
+
+		kube := podmanTest.Podman([]string{"play", "kube", kubeYaml})
+		kube.WaitWithDefaultTimeout()
+		Expect(kube).Should(Exit(125))
+
+	})
+
 	It("podman play kube support container liveness probe", func() {
 		err := writeYaml(livenessProbePodYaml, kubeYaml)
 		Expect(err).To(BeNil())