package docker import ( "bytes" "fmt" "github.com/dotcloud/docker/utils" "io" "log" "net" "os" "runtime" "strconv" "strings" "sync" "syscall" "testing" "time" ) const ( unitTestImageName = "docker-test-image" unitTestImageID = "83599e29c455eb719f77d799bc7c51521b9551972f5a850d7ad265bc1b5292f6" // 1.0 unitTestNetworkBridge = "testdockbr0" unitTestStoreBase = "/var/lib/docker/unit-tests" testDaemonAddr = "127.0.0.1:4270" testDaemonProto = "tcp" ) var ( globalRuntime *Runtime startFds int startGoroutines int ) func nuke(runtime *Runtime) error { var wg sync.WaitGroup for _, container := range runtime.List() { wg.Add(1) go func(c *Container) { c.Kill() wg.Done() }(container) } wg.Wait() return os.RemoveAll(runtime.root) } func cleanup(runtime *Runtime) error { for _, container := range runtime.List() { container.Kill() runtime.Destroy(container) } images, err := runtime.graph.All() if err != nil { return err } for _, image := range images { if image.ID != unitTestImageID { runtime.graph.Delete(image.ID) } } return nil } func layerArchive(tarfile string) (io.Reader, error) { // FIXME: need to close f somewhere f, err := os.Open(tarfile) if err != nil { return nil, err } return f, nil } func init() { // Hack to run sys init during unit testing if selfPath := utils.SelfPath(); selfPath == "/sbin/init" || selfPath == "/.dockerinit" { SysInit() return } if uid := syscall.Geteuid(); uid != 0 { log.Fatal("docker tests need to be run as root") } NetworkBridgeIface = unitTestNetworkBridge // Make it our Store root if runtime, err := NewRuntimeFromDirectory(unitTestStoreBase, false); err != nil { panic(err) } else { globalRuntime = runtime } // Create the "Server" srv := &Server{ runtime: globalRuntime, enableCors: false, pullingPool: make(map[string]struct{}), pushingPool: make(map[string]struct{}), } // If the unit test is not found, try to download it. if img, err := globalRuntime.repositories.LookupImage(unitTestImageName); err != nil || img.ID != unitTestImageID { // Retrieve the Image if err := srv.ImagePull(unitTestImageName, "", os.Stdout, utils.NewStreamFormatter(false), nil, true); err != nil { panic(err) } } // Spawn a Daemon go func() { if err := ListenAndServe(testDaemonProto, testDaemonAddr, srv, os.Getenv("DEBUG") != ""); err != nil { panic(err) } }() // Give some time to ListenAndServer to actually start time.Sleep(time.Second) startFds, startGoroutines = utils.GetTotalUsedFds(), runtime.NumGoroutine() } // FIXME: test that ImagePull(json=true) send correct json output func GetTestImage(runtime *Runtime) *Image { imgs, err := runtime.graph.All() if err != nil { panic(err) } for i := range imgs { if imgs[i].ID == unitTestImageID { return imgs[i] } } panic(fmt.Errorf("Test image %v not found", unitTestImageID)) } func TestRuntimeCreate(t *testing.T) { runtime := mkRuntime(t) defer nuke(runtime) // Make sure we start we 0 containers if len(runtime.List()) != 0 { t.Errorf("Expected 0 containers, %v found", len(runtime.List())) } builder := NewBuilder(runtime) container, err := builder.Create(&Config{ Image: GetTestImage(runtime).ID, Cmd: []string{"ls", "-al"}, }, ) if err != nil { t.Fatal(err) } defer func() { if err := runtime.Destroy(container); err != nil { t.Error(err) } }() // Make sure we can find the newly created container with List() if len(runtime.List()) != 1 { t.Errorf("Expected 1 container, %v found", len(runtime.List())) } // Make sure the container List() returns is the right one if runtime.List()[0].ID != container.ID { t.Errorf("Unexpected container %v returned by List", runtime.List()[0]) } // Make sure we can get the container with Get() if runtime.Get(container.ID) == nil { t.Errorf("Unable to get newly created container") } // Make sure it is the right container if runtime.Get(container.ID) != container { t.Errorf("Get() returned the wrong container") } // Make sure Exists returns it as existing if !runtime.Exists(container.ID) { t.Errorf("Exists() returned false for a newly created container") } // Make sure crete with bad parameters returns an error _, err = builder.Create( &Config{ Image: GetTestImage(runtime).ID, }, ) if err == nil { t.Fatal("Builder.Create should throw an error when Cmd is missing") } _, err = builder.Create( &Config{ Image: GetTestImage(runtime).ID, Cmd: []string{}, }, ) if err == nil { t.Fatal("Builder.Create should throw an error when Cmd is empty") } } func TestDestroy(t *testing.T) { runtime := mkRuntime(t) defer nuke(runtime) container, err := NewBuilder(runtime).Create(&Config{ Image: GetTestImage(runtime).ID, Cmd: []string{"ls", "-al"}, }, ) if err != nil { t.Fatal(err) } // Destroy if err := runtime.Destroy(container); err != nil { t.Error(err) } // Make sure runtime.Exists() behaves correctly if runtime.Exists("test_destroy") { t.Errorf("Exists() returned true") } // Make sure runtime.List() doesn't list the destroyed container if len(runtime.List()) != 0 { t.Errorf("Expected 0 container, %v found", len(runtime.List())) } // Make sure runtime.Get() refuses to return the unexisting container if runtime.Get(container.ID) != nil { t.Errorf("Unable to get newly created container") } // Make sure the container root directory does not exist anymore _, err = os.Stat(container.root) if err == nil || !os.IsNotExist(err) { t.Errorf("Container root directory still exists after destroy") } // Test double destroy if err := runtime.Destroy(container); err == nil { // It should have failed t.Errorf("Double destroy did not fail") } } func TestGet(t *testing.T) { runtime := mkRuntime(t) defer nuke(runtime) container1, _, _ := mkContainer(runtime, []string{"_", "ls", "-al"}, t) defer runtime.Destroy(container1) container2, _, _ := mkContainer(runtime, []string{"_", "ls", "-al"}, t) defer runtime.Destroy(container2) container3, _, _ := mkContainer(runtime, []string{"_", "ls", "-al"}, t) defer runtime.Destroy(container3) if runtime.Get(container1.ID) != container1 { t.Errorf("Get(test1) returned %v while expecting %v", runtime.Get(container1.ID), container1) } if runtime.Get(container2.ID) != container2 { t.Errorf("Get(test2) returned %v while expecting %v", runtime.Get(container2.ID), container2) } if runtime.Get(container3.ID) != container3 { t.Errorf("Get(test3) returned %v while expecting %v", runtime.Get(container3.ID), container3) } } func startEchoServerContainer(t *testing.T, proto string) (*Runtime, *Container, string) { var err error runtime := mkRuntime(t) port := 5554 var container *Container var strPort string for { port += 1 strPort = strconv.Itoa(port) var cmd string if proto == "tcp" { cmd = "socat TCP-LISTEN:" + strPort + ",reuseaddr,fork EXEC:/bin/cat" } else if proto == "udp" { cmd = "socat UDP-RECVFROM:" + strPort + ",fork EXEC:/bin/cat" } else { t.Fatal(fmt.Errorf("Unknown protocol %v", proto)) } t.Log("Trying port", strPort) container, err = NewBuilder(runtime).Create(&Config{ Image: GetTestImage(runtime).ID, Cmd: []string{"sh", "-c", cmd}, PortSpecs: []string{fmt.Sprintf("%s/%s", strPort, proto)}, }) if container != nil { break } if err != nil { nuke(runtime) t.Fatal(err) } t.Logf("Port %v already in use", strPort) } hostConfig := &HostConfig{} if err := container.Start(hostConfig); err != nil { nuke(runtime) t.Fatal(err) } setTimeout(t, "Waiting for the container to be started timed out", 2*time.Second, func() { for !container.State.Running { time.Sleep(10 * time.Millisecond) } }) // Even if the state is running, lets give some time to lxc to spawn the process container.WaitTimeout(500 * time.Millisecond) strPort = container.NetworkSettings.PortMapping[strings.Title(proto)][strPort] return runtime, container, strPort } // Run a container with a TCP port allocated, and test that it can receive connections on localhost func TestAllocateTCPPortLocalhost(t *testing.T) { runtime, container, port := startEchoServerContainer(t, "tcp") defer nuke(runtime) defer container.Kill() for i := 0; i != 10; i++ { conn, err := net.Dial("tcp", fmt.Sprintf("localhost:%v", port)) if err != nil { t.Fatal(err) } defer conn.Close() input := bytes.NewBufferString("well hello there\n") _, err = conn.Write(input.Bytes()) if err != nil { t.Fatal(err) } buf := make([]byte, 16) read := 0 conn.SetReadDeadline(time.Now().Add(3 * time.Second)) read, err = conn.Read(buf) if err != nil { if err, ok := err.(*net.OpError); ok { if err.Err == syscall.ECONNRESET { t.Logf("Connection reset by the proxy, socat is probably not listening yet, trying again in a sec") conn.Close() time.Sleep(time.Second) continue } if err.Timeout() { t.Log("Timeout, trying again") conn.Close() continue } } t.Fatal(err) } output := string(buf[:read]) if !strings.Contains(output, "well hello there") { t.Fatal(fmt.Errorf("[%v] doesn't contain [well hello there]", output)) } else { return } } t.Fatal("No reply from the container") } // Run a container with an UDP port allocated, and test that it can receive connections on localhost func TestAllocateUDPPortLocalhost(t *testing.T) { runtime, container, port := startEchoServerContainer(t, "udp") defer nuke(runtime) defer container.Kill() conn, err := net.Dial("udp", fmt.Sprintf("localhost:%v", port)) if err != nil { t.Fatal(err) } defer conn.Close() input := bytes.NewBufferString("well hello there\n") buf := make([]byte, 16) // Try for a minute, for some reason the select in socat may take ages // to return even though everything on the path seems fine (i.e: the // UDPProxy forwards the traffic correctly and you can see the packets // on the interface from within the container). for i := 0; i != 120; i++ { _, err := conn.Write(input.Bytes()) if err != nil { t.Fatal(err) } conn.SetReadDeadline(time.Now().Add(500 * time.Millisecond)) read, err := conn.Read(buf) if err == nil { output := string(buf[:read]) if strings.Contains(output, "well hello there") { return } } } t.Fatal("No reply from the container") } func TestRestore(t *testing.T) { runtime1 := mkRuntime(t) defer nuke(runtime1) // Create a container with one instance of docker container1, _, _ := mkContainer(runtime1, []string{"_", "ls", "-al"}, t) defer runtime1.Destroy(container1) // Create a second container meant to be killed container2, _, _ := mkContainer(runtime1, []string{"-i", "_", "/bin/cat"}, t) defer runtime1.Destroy(container2) // Start the container non blocking hostConfig := &HostConfig{} if err := container2.Start(hostConfig); err != nil { t.Fatal(err) } if !container2.State.Running { t.Fatalf("Container %v should appear as running but isn't", container2.ID) } // Simulate a crash/manual quit of dockerd: process dies, states stays 'Running' cStdin, _ := container2.StdinPipe() cStdin.Close() if err := container2.WaitTimeout(2 * time.Second); err != nil { t.Fatal(err) } container2.State.Running = true container2.ToDisk() if len(runtime1.List()) != 2 { t.Errorf("Expected 2 container, %v found", len(runtime1.List())) } if err := container1.Run(); err != nil { t.Fatal(err) } if !container2.State.Running { t.Fatalf("Container %v should appear as running but isn't", container2.ID) } // Here are are simulating a docker restart - that is, reloading all containers // from scratch runtime2, err := NewRuntimeFromDirectory(runtime1.root, false) if err != nil { t.Fatal(err) } defer nuke(runtime2) if len(runtime2.List()) != 2 { t.Errorf("Expected 2 container, %v found", len(runtime2.List())) } runningCount := 0 for _, c := range runtime2.List() { if c.State.Running { t.Errorf("Running container found: %v (%v)", c.ID, c.Path) runningCount++ } } if runningCount != 0 { t.Fatalf("Expected 0 container alive, %d found", runningCount) } container3 := runtime2.Get(container1.ID) if container3 == nil { t.Fatal("Unable to Get container") } if err := container3.Run(); err != nil { t.Fatal(err) } container2.State.Running = false }