package docker import ( "fmt" "github.com/dotcloud/docker/registry" "github.com/dotcloud/docker/utils" "io" "io/ioutil" "net" "os" "os/exec" "os/user" "sync" "testing" "time" ) const unitTestImageName string = "docker-ut" const unitTestStoreBase string = "/var/lib/docker/unit-tests" 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 CopyDirectory(source, dest string) error { if _, err := exec.Command("cp", "-ra", source, dest).Output(); err != nil { return err } 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 utils.SelfPath() == "/sbin/init" { SysInit() return } if usr, err := user.Current(); err != nil { panic(err) } else if usr.Uid != "0" { panic("docker tests needs to be run as root") } NetworkBridgeIface = "testdockbr0" // Make it our Store root runtime, err := NewRuntimeFromDirectory(unitTestStoreBase, false) if err != nil { panic(err) } // Create the "Server" srv := &Server{ runtime: runtime, registry: registry.NewRegistry(runtime.root), } // Retrieve the Image if err := srv.ImagePull(unitTestImageName, "", "", os.Stdout); err != nil { panic(err) } } func newTestRuntime() (*Runtime, error) { root, err := ioutil.TempDir("", "docker-test") if err != nil { return nil, err } if err := os.Remove(root); err != nil { return nil, err } if err := CopyDirectory(unitTestStoreBase, root); err != nil { return nil, err } runtime, err := NewRuntimeFromDirectory(root, false) if err != nil { return nil, err } runtime.UpdateCapabilities(true) return runtime, nil } func GetTestImage(runtime *Runtime) *Image { imgs, err := runtime.graph.All() if err != nil { panic(err) } else if len(imgs) < 1 { panic("GASP") } return imgs[0] } func TestRuntimeCreate(t *testing.T) { runtime, err := newTestRuntime() if err != nil { t.Fatal(err) } 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, err := newTestRuntime() if err != nil { t.Fatal(err) } 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, err := newTestRuntime() if err != nil { t.Fatal(err) } defer nuke(runtime) builder := NewBuilder(runtime) container1, err := builder.Create(&Config{ Image: GetTestImage(runtime).Id, Cmd: []string{"ls", "-al"}, }, ) if err != nil { t.Fatal(err) } defer runtime.Destroy(container1) container2, err := builder.Create(&Config{ Image: GetTestImage(runtime).Id, Cmd: []string{"ls", "-al"}, }, ) if err != nil { t.Fatal(err) } defer runtime.Destroy(container2) container3, err := builder.Create(&Config{ Image: GetTestImage(runtime).Id, Cmd: []string{"ls", "-al"}, }, ) if err != nil { t.Fatal(err) } 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) } } // Run a container with a TCP port allocated, and test that it can receive connections on localhost func TestAllocatePortLocalhost(t *testing.T) { runtime, err := newTestRuntime() if err != nil { t.Fatal(err) } container, err := NewBuilder(runtime).Create(&Config{ Image: GetTestImage(runtime).Id, Cmd: []string{"sh", "-c", "echo well hello there | nc -l -p 5555"}, PortSpecs: []string{"5555"}, }, ) if err != nil { t.Fatal(err) } if err := container.Start(); err != nil { t.Fatal(err) } defer container.Kill() setTimeout(t, "Waiting for the container to be started timed out", 2*time.Second, func() { for { if container.State.Running { break } time.Sleep(10 * time.Millisecond) } }) conn, err := net.Dial("tcp", fmt.Sprintf( "localhost:%s", container.NetworkSettings.PortMapping["5555"], ), ) if err != nil { t.Fatal(err) } defer conn.Close() output, err := ioutil.ReadAll(conn) if err != nil { t.Fatal(err) } if string(output) != "well hello there\n" { t.Fatalf("Received wrong output from network connection: should be '%s', not '%s'", "well hello there\n", string(output), ) } container.Wait() } func TestRestore(t *testing.T) { root, err := ioutil.TempDir("", "docker-test") if err != nil { t.Fatal(err) } if err := os.Remove(root); err != nil { t.Fatal(err) } if err := CopyDirectory(unitTestStoreBase, root); err != nil { t.Fatal(err) } runtime1, err := NewRuntimeFromDirectory(root, false) if err != nil { t.Fatal(err) } builder := NewBuilder(runtime1) // Create a container with one instance of docker container1, err := builder.Create(&Config{ Image: GetTestImage(runtime1).Id, Cmd: []string{"ls", "-al"}, }, ) if err != nil { t.Fatal(err) } defer runtime1.Destroy(container1) // Create a second container meant to be killed container2, err := builder.Create(&Config{ Image: GetTestImage(runtime1).Id, Cmd: []string{"/bin/cat"}, OpenStdin: true, }, ) if err != nil { t.Fatal(err) } defer runtime1.Destroy(container2) // Start the container non blocking if err := container2.Start(); 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(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 }