Add the names flag for pod logs

Fixes containers#13261

Signed-off-by: Xueyuan Chen <X.Chen-47@student.tudelft.nl>

cmd/podman/pods/logs.go

@@ -87,6 +87,7 @@ func logsFlags(cmd *cobra.Command) {
 	flags.Int64Var(&logsPodOptions.Tail, tailFlagName, -1, "Output the specified number of LINES at the end of the logs.")
 	_ = cmd.RegisterFlagCompletionFunc(tailFlagName, completion.AutocompleteNone)
 
+	flags.BoolVarP(&logsPodOptions.Names, "names", "n", false, "Output container names instead of container IDs in the log")
 	flags.BoolVarP(&logsPodOptions.Timestamps, "timestamps", "t", false, "Output the timestamps in the log")
 	flags.SetInterspersed(false)
 	_ = flags.MarkHidden("details")

docs/source/markdown/podman-pod-logs.1.md

@@ -28,6 +28,10 @@ chance that the log file will be removed before `podman pod logs` reads the fina
 
 Instead of providing the pod name or id, get logs of the last created pod. (This option is not available with the remote Podman client, including Mac and Windows (excluding WSL2) machines)
 
+#### **--names**, **-n**
+
+Output the container names instead of the container IDs in the log.
+
 #### **--since**=*TIMESTAMP*
 
 Show logs since TIMESTAMP. The --since option can be Unix timestamps, date formatted timestamps, or Go duration

libpod/container_log_linux.go

@@ -1,5 +1,5 @@
-//+build linux
+//go:build linux && systemd
-//+build systemd
+// +build linux,systemd
 
 package libpod
 
@@ -235,6 +235,9 @@ func (c *Container) readFromJournal(ctx context.Context, options *logs.LogOption
 				logrus.Errorf("Failed parse log line: %v", err)
 				return
 			}
+			if options.UseName {
+				logLine.CName = c.Name()
+			}
 			if doTail {
 				tailQueue = append(tailQueue, logLine)
 				continue

test/e2e/logs_test.go

@@ -37,7 +37,9 @@ var _ = Describe("Podman logs", func() {
 		}
 		podmanTest = PodmanTestCreate(tempdir)
 		podmanTest.Setup()
-		podmanTest.SeedImages()
+		if err := podmanTest.SeedImages(); err != nil {
+			os.Exit(1)
+		}
 	})
 
 	AfterEach(func() {
@@ -412,4 +414,33 @@ var _ = Describe("Podman logs", func() {
 		logs.WaitWithDefaultTimeout()
 		Expect(logs).To(Not(Exit(0)))
 	})
+
+	It("podman pod logs with container names", func() {
+		SkipIfRemote("Remote can only process one container at a time")
+		SkipIfInContainer("journalctl inside a container doesn't work correctly")
+		podName := "testPod"
+		containerName1 := "container1"
+		containerName2 := "container2"
+
+		testPod := podmanTest.Podman([]string{"pod", "create", fmt.Sprintf("--name=%s", podName)})
+		testPod.WaitWithDefaultTimeout()
+		Expect(testPod).To(Exit(0))
+
+		log1 := podmanTest.Podman([]string{"run", "--name", containerName1, "-d", "--pod", podName, BB, "/bin/sh", "-c", "echo log1"})
+		log1.WaitWithDefaultTimeout()
+		Expect(log1).To(Exit(0))
+
+		log2 := podmanTest.Podman([]string{"run", "--name", containerName2, "-d", "--pod", podName, BB, "/bin/sh", "-c", "echo log2"})
+		log2.WaitWithDefaultTimeout()
+		Expect(log2).To(Exit(0))
+
+		results := podmanTest.Podman([]string{"pod", "logs", "--names", podName})
+		results.WaitWithDefaultTimeout()
+		Expect(results).To(Exit(0))
+
+		output := results.OutputToStringArray()
+		Expect(output).To(HaveLen(2))
+		Expect(output).To(ContainElement(ContainSubstring(containerName1)))
+		Expect(output).To(ContainElement(ContainSubstring(containerName2)))
+	})
 })