Merge pull request #13732 from flouthoc/reuse-configmap-volume

kube: `configmap` volume should be reused if already exists

pkg/domain/infra/abi/play.go

@@ -290,7 +290,16 @@ func (ic *ContainerEngine) playKubePod(ctx context.Context, podName string, podY
 		if v.Type == kube.KubeVolumeTypeConfigMap && !v.Optional {
 			vol, err := ic.Libpod.NewVolume(ctx, libpod.WithVolumeName(v.Source))
 			if err != nil {
-				return nil, errors.Wrapf(err, "cannot create a local volume for volume from configmap %q", v.Source)
+				if errors.Is(err, define.ErrVolumeExists) {
+					// Volume for this configmap already exists do not
+					// error out instead reuse the current volume.
+					vol, err = ic.Libpod.GetVolume(v.Source)
+					if err != nil {
+						return nil, errors.Wrapf(err, "cannot re-use local volume for volume from configmap %q", v.Source)
+					}
+				} else {
+					return nil, errors.Wrapf(err, "cannot create a local volume for volume from configmap %q", v.Source)
+				}
 			}
 			mountPoint, err := vol.MountPoint()
 			if err != nil || mountPoint == "" {

test/e2e/play_kube_test.go

@@ -1679,6 +1679,32 @@ var _ = Describe("Podman play kube", func() {
 		Expect(inspect.OutputToString()).To(ContainSubstring(`FOO=foo`))
 	})
 
+	It("podman play kube test env value from configmap and --replace should reuse the configmap volume", func() {
+		SkipIfRemote("configmap list is not supported as a param")
+		cmYamlPathname := filepath.Join(podmanTest.TempDir, "foo-cm.yaml")
+		cm := getConfigMap(withConfigMapName("foo"), withConfigMapData("FOO", "foo"))
+		err := generateKubeYaml("configmap", cm, cmYamlPathname)
+		Expect(err).To(BeNil())
+
+		pod := getPod(withCtr(getCtr(withEnv("FOO", "", "configmap", "foo", "FOO", false))))
+		err = generateKubeYaml("pod", pod, kubeYaml)
+		Expect(err).To(BeNil())
+
+		kube := podmanTest.Podman([]string{"play", "kube", kubeYaml, "--configmap", cmYamlPathname})
+		kube.WaitWithDefaultTimeout()
+		Expect(kube).Should(Exit(0))
+
+		// create pod again with --replace
+		kube = podmanTest.Podman([]string{"play", "kube", "--replace", kubeYaml, "--configmap", cmYamlPathname})
+		kube.WaitWithDefaultTimeout()
+		Expect(kube).Should(Exit(0))
+
+		inspect := podmanTest.Podman([]string{"inspect", getCtrNameInPod(pod), "--format", "'{{ .Config.Env }}'"})
+		inspect.WaitWithDefaultTimeout()
+		Expect(inspect).Should(Exit(0))
+		Expect(inspect.OutputToString()).To(ContainSubstring(`FOO=foo`))
+	})
+
 	It("podman play kube test required env value from configmap with missing key", func() {
 		SkipIfRemote("configmap list is not supported as a param")
 		cmYamlPathname := filepath.Join(podmanTest.TempDir, "foo-cm.yaml")