package main import ( "bufio" "bytes" "encoding/json" "errors" "fmt" "io" "io/ioutil" "net" "net/http" "net/http/httptest" "net/http/httputil" "net/url" "os" "os/exec" "path" "path/filepath" "strconv" "strings" "time" "github.com/docker/docker/api/types" "github.com/docker/docker/opts" "github.com/docker/docker/pkg/httputils" "github.com/docker/docker/pkg/ioutils" "github.com/docker/docker/pkg/stringutils" "github.com/go-check/check" ) // Daemon represents a Docker daemon for the testing framework. type Daemon struct { // Defaults to "daemon" // Useful to set to --daemon or -d for checking backwards compatibility Command string GlobalFlags []string id string c *check.C logFile *os.File folder string stdin io.WriteCloser stdout, stderr io.ReadCloser cmd *exec.Cmd storageDriver string execDriver string wait chan error userlandProxy bool } func enableUserlandProxy() bool { if env := os.Getenv("DOCKER_USERLANDPROXY"); env != "" { if val, err := strconv.ParseBool(env); err != nil { return val } } return true } // NewDaemon returns a Daemon instance to be used for testing. // This will create a directory such as d123456789 in the folder specified by $DEST. // The daemon will not automatically start. func NewDaemon(c *check.C) *Daemon { dest := os.Getenv("DEST") if dest == "" { c.Fatal("Please set the DEST environment variable") } id := fmt.Sprintf("d%d", time.Now().UnixNano()%100000000) dir := filepath.Join(dest, id) daemonFolder, err := filepath.Abs(dir) if err != nil { c.Fatalf("Could not make %q an absolute path: %v", dir, err) } if err := os.MkdirAll(filepath.Join(daemonFolder, "graph"), 0600); err != nil { c.Fatalf("Could not create %s/graph directory", daemonFolder) } userlandProxy := true if env := os.Getenv("DOCKER_USERLANDPROXY"); env != "" { if val, err := strconv.ParseBool(env); err != nil { userlandProxy = val } } return &Daemon{ Command: "daemon", id: id, c: c, folder: daemonFolder, storageDriver: os.Getenv("DOCKER_GRAPHDRIVER"), execDriver: os.Getenv("DOCKER_EXECDRIVER"), userlandProxy: userlandProxy, } } // Start will start the daemon and return once it is ready to receive requests. // You can specify additional daemon flags. func (d *Daemon) Start(arg ...string) error { dockerBinary, err := exec.LookPath(dockerBinary) if err != nil { d.c.Fatalf("[%s] could not find docker binary in $PATH: %v", d.id, err) } args := append(d.GlobalFlags, d.Command, "--host", d.sock(), "--graph", fmt.Sprintf("%s/graph", d.folder), "--pidfile", fmt.Sprintf("%s/docker.pid", d.folder), fmt.Sprintf("--userland-proxy=%t", d.userlandProxy), ) // If we don't explicitly set the log-level or debug flag(-D) then // turn on debug mode foundIt := false for _, a := range arg { if strings.Contains(a, "--log-level") || strings.Contains(a, "-D") || strings.Contains(a, "--debug") { foundIt = true } } if !foundIt { args = append(args, "--debug") } if d.storageDriver != "" { args = append(args, "--storage-driver", d.storageDriver) } if d.execDriver != "" { args = append(args, "--exec-driver", d.execDriver) } args = append(args, arg...) d.cmd = exec.Command(dockerBinary, args...) d.logFile, err = os.OpenFile(filepath.Join(d.folder, "docker.log"), os.O_RDWR|os.O_CREATE|os.O_APPEND, 0600) if err != nil { d.c.Fatalf("[%s] Could not create %s/docker.log: %v", d.id, d.folder, err) } d.cmd.Stdout = d.logFile d.cmd.Stderr = d.logFile if err := d.cmd.Start(); err != nil { return fmt.Errorf("[%s] could not start daemon container: %v", d.id, err) } wait := make(chan error) go func() { wait <- d.cmd.Wait() d.c.Logf("[%s] exiting daemon", d.id) close(wait) }() d.wait = wait tick := time.Tick(500 * time.Millisecond) // make sure daemon is ready to receive requests startTime := time.Now().Unix() for { d.c.Logf("[%s] waiting for daemon to start", d.id) if time.Now().Unix()-startTime > 5 { // After 5 seconds, give up return fmt.Errorf("[%s] Daemon exited and never started", d.id) } select { case <-time.After(2 * time.Second): return fmt.Errorf("[%s] timeout: daemon does not respond", d.id) case <-tick: c, err := net.Dial("unix", filepath.Join(d.folder, "docker.sock")) if err != nil { continue } client := httputil.NewClientConn(c, nil) defer client.Close() req, err := http.NewRequest("GET", "/_ping", nil) if err != nil { d.c.Fatalf("[%s] could not create new request: %v", d.id, err) } resp, err := client.Do(req) if err != nil { continue } if resp.StatusCode != http.StatusOK { d.c.Logf("[%s] received status != 200 OK: %s", d.id, resp.Status) } d.c.Logf("[%s] daemon started", d.id) return nil } } } // StartWithBusybox will first start the daemon with Daemon.Start() // then save the busybox image from the main daemon and load it into this Daemon instance. func (d *Daemon) StartWithBusybox(arg ...string) error { if err := d.Start(arg...); err != nil { return err } bb := filepath.Join(d.folder, "busybox.tar") if _, err := os.Stat(bb); err != nil { if !os.IsNotExist(err) { return fmt.Errorf("unexpected error on busybox.tar stat: %v", err) } // saving busybox image from main daemon if err := exec.Command(dockerBinary, "save", "--output", bb, "busybox:latest").Run(); err != nil { return fmt.Errorf("could not save busybox image: %v", err) } } // loading busybox image to this daemon if _, err := d.Cmd("load", "--input", bb); err != nil { return fmt.Errorf("could not load busybox image: %v", err) } if err := os.Remove(bb); err != nil { d.c.Logf("Could not remove %s: %v", bb, err) } return nil } // Stop will send a SIGINT every second and wait for the daemon to stop. // If it timeouts, a SIGKILL is sent. // Stop will not delete the daemon directory. If a purged daemon is needed, // instantiate a new one with NewDaemon. func (d *Daemon) Stop() error { if d.cmd == nil || d.wait == nil { return errors.New("daemon not started") } defer func() { d.logFile.Close() d.cmd = nil }() i := 1 tick := time.Tick(time.Second) if err := d.cmd.Process.Signal(os.Interrupt); err != nil { return fmt.Errorf("could not send signal: %v", err) } out1: for { select { case err := <-d.wait: return err case <-time.After(15 * time.Second): // time for stopping jobs and run onShutdown hooks d.c.Log("timeout") break out1 } } out2: for { select { case err := <-d.wait: return err case <-tick: i++ if i > 4 { d.c.Logf("tried to interrupt daemon for %d times, now try to kill it", i) break out2 } d.c.Logf("Attempt #%d: daemon is still running with pid %d", i, d.cmd.Process.Pid) if err := d.cmd.Process.Signal(os.Interrupt); err != nil { return fmt.Errorf("could not send signal: %v", err) } } } if err := d.cmd.Process.Kill(); err != nil { d.c.Logf("Could not kill daemon: %v", err) return err } return nil } // Restart will restart the daemon by first stopping it and then starting it. func (d *Daemon) Restart(arg ...string) error { d.Stop() return d.Start(arg...) } func (d *Daemon) sock() string { return fmt.Sprintf("unix://%s/docker.sock", d.folder) } // Cmd will execute a docker CLI command against this Daemon. // Example: d.Cmd("version") will run docker -H unix://path/to/unix.sock version func (d *Daemon) Cmd(name string, arg ...string) (string, error) { args := []string{"--host", d.sock(), name} args = append(args, arg...) c := exec.Command(dockerBinary, args...) b, err := c.CombinedOutput() return string(b), err } // CmdWithArgs will execute a docker CLI command against a daemon with the // given additional arguments func (d *Daemon) CmdWithArgs(daemonArgs []string, name string, arg ...string) (string, error) { args := append(daemonArgs, name) args = append(args, arg...) c := exec.Command(dockerBinary, args...) b, err := c.CombinedOutput() return string(b), err } // LogfileName returns the path the the daemon's log file func (d *Daemon) LogfileName() string { return d.logFile.Name() } func daemonHost() string { daemonURLStr := "unix://" + opts.DefaultUnixSocket if daemonHostVar := os.Getenv("DOCKER_HOST"); daemonHostVar != "" { daemonURLStr = daemonHostVar } return daemonURLStr } func sockConn(timeout time.Duration) (net.Conn, error) { daemon := daemonHost() daemonURL, err := url.Parse(daemon) if err != nil { return nil, fmt.Errorf("could not parse url %q: %v", daemon, err) } var c net.Conn switch daemonURL.Scheme { case "unix": return net.DialTimeout(daemonURL.Scheme, daemonURL.Path, timeout) case "tcp": return net.DialTimeout(daemonURL.Scheme, daemonURL.Host, timeout) default: return c, fmt.Errorf("unknown scheme %v (%s)", daemonURL.Scheme, daemon) } } func sockRequest(method, endpoint string, data interface{}) (int, []byte, error) { jsonData := bytes.NewBuffer(nil) if err := json.NewEncoder(jsonData).Encode(data); err != nil { return -1, nil, err } res, body, err := sockRequestRaw(method, endpoint, jsonData, "application/json") if err != nil { return -1, nil, err } b, err := readBody(body) return res.StatusCode, b, err } func sockRequestRaw(method, endpoint string, data io.Reader, ct string) (*http.Response, io.ReadCloser, error) { req, client, err := newRequestClient(method, endpoint, data, ct) if err != nil { return nil, nil, err } resp, err := client.Do(req) if err != nil { client.Close() return nil, nil, err } body := ioutils.NewReadCloserWrapper(resp.Body, func() error { defer resp.Body.Close() return client.Close() }) return resp, body, nil } func sockRequestHijack(method, endpoint string, data io.Reader, ct string) (net.Conn, *bufio.Reader, error) { req, client, err := newRequestClient(method, endpoint, data, ct) if err != nil { return nil, nil, err } client.Do(req) conn, br := client.Hijack() return conn, br, nil } func newRequestClient(method, endpoint string, data io.Reader, ct string) (*http.Request, *httputil.ClientConn, error) { c, err := sockConn(time.Duration(10 * time.Second)) if err != nil { return nil, nil, fmt.Errorf("could not dial docker daemon: %v", err) } client := httputil.NewClientConn(c, nil) req, err := http.NewRequest(method, endpoint, data) if err != nil { client.Close() return nil, nil, fmt.Errorf("could not create new request: %v", err) } if ct != "" { req.Header.Set("Content-Type", ct) } return req, client, nil } func readBody(b io.ReadCloser) ([]byte, error) { defer b.Close() return ioutil.ReadAll(b) } func deleteContainer(container string) error { container = strings.TrimSpace(strings.Replace(container, "\n", " ", -1)) rmArgs := strings.Split(fmt.Sprintf("rm -fv %v", container), " ") exitCode, err := runCommand(exec.Command(dockerBinary, rmArgs...)) // set error manually if not set if exitCode != 0 && err == nil { err = fmt.Errorf("failed to remove container: `docker rm` exit is non-zero") } return err } func getAllContainers() (string, error) { getContainersCmd := exec.Command(dockerBinary, "ps", "-q", "-a") out, exitCode, err := runCommandWithOutput(getContainersCmd) if exitCode != 0 && err == nil { err = fmt.Errorf("failed to get a list of containers: %v\n", out) } return out, err } func deleteAllContainers() error { containers, err := getAllContainers() if err != nil { fmt.Println(containers) return err } if err = deleteContainer(containers); err != nil { return err } return nil } var protectedImages = map[string]struct{}{} func init() { out, err := exec.Command(dockerBinary, "images").CombinedOutput() if err != nil { panic(err) } lines := strings.Split(string(out), "\n")[1:] for _, l := range lines { if l == "" { continue } fields := strings.Fields(l) imgTag := fields[0] + ":" + fields[1] // just for case if we have dangling images in tested daemon if imgTag != ":" { protectedImages[imgTag] = struct{}{} } } // Obtain the daemon platform so that it can be used by tests to make // intelligent decisions about how to configure themselves, and validate // that the target platform is valid. res, b, err := sockRequestRaw("GET", "/version", nil, "application/json") defer b.Close() if err != nil || res.StatusCode != http.StatusOK { panic("Init failed to get version: " + err.Error() + " " + string(res.StatusCode)) } svrHeader, _ := httputils.ParseServerHeader(res.Header.Get("Server")) daemonPlatform = svrHeader.OS if daemonPlatform != "linux" && daemonPlatform != "windows" { panic("Cannot run tests against platform: " + daemonPlatform) } } func deleteAllImages() error { out, err := exec.Command(dockerBinary, "images").CombinedOutput() if err != nil { return err } lines := strings.Split(string(out), "\n")[1:] var imgs []string for _, l := range lines { if l == "" { continue } fields := strings.Fields(l) imgTag := fields[0] + ":" + fields[1] if _, ok := protectedImages[imgTag]; !ok { if fields[0] == "" { imgs = append(imgs, fields[2]) continue } imgs = append(imgs, imgTag) } } if len(imgs) == 0 { return nil } args := append([]string{"rmi", "-f"}, imgs...) if err := exec.Command(dockerBinary, args...).Run(); err != nil { return err } return nil } func getPausedContainers() (string, error) { getPausedContainersCmd := exec.Command(dockerBinary, "ps", "-f", "status=paused", "-q", "-a") out, exitCode, err := runCommandWithOutput(getPausedContainersCmd) if exitCode != 0 && err == nil { err = fmt.Errorf("failed to get a list of paused containers: %v\n", out) } return out, err } func getSliceOfPausedContainers() ([]string, error) { out, err := getPausedContainers() if err == nil { if len(out) == 0 { return nil, err } slice := strings.Split(strings.TrimSpace(out), "\n") return slice, err } return []string{out}, err } func unpauseContainer(container string) error { unpauseCmd := exec.Command(dockerBinary, "unpause", container) exitCode, err := runCommand(unpauseCmd) if exitCode != 0 && err == nil { err = fmt.Errorf("failed to unpause container") } return nil } func unpauseAllContainers() error { containers, err := getPausedContainers() if err != nil { fmt.Println(containers) return err } containers = strings.Replace(containers, "\n", " ", -1) containers = strings.Trim(containers, " ") containerList := strings.Split(containers, " ") for _, value := range containerList { if err = unpauseContainer(value); err != nil { return err } } return nil } func deleteImages(images ...string) error { args := []string{"rmi", "-f"} args = append(args, images...) rmiCmd := exec.Command(dockerBinary, args...) exitCode, err := runCommand(rmiCmd) // set error manually if not set if exitCode != 0 && err == nil { err = fmt.Errorf("failed to remove image: `docker rmi` exit is non-zero") } return err } func imageExists(image string) error { inspectCmd := exec.Command(dockerBinary, "inspect", image) exitCode, err := runCommand(inspectCmd) if exitCode != 0 && err == nil { err = fmt.Errorf("couldn't find image %q", image) } return err } func pullImageIfNotExist(image string) (err error) { if err := imageExists(image); err != nil { pullCmd := exec.Command(dockerBinary, "pull", image) _, exitCode, err := runCommandWithOutput(pullCmd) if err != nil || exitCode != 0 { err = fmt.Errorf("image %q wasn't found locally and it couldn't be pulled: %s", image, err) } } return } func dockerCmdWithError(args ...string) (string, int, error) { return runCommandWithOutput(exec.Command(dockerBinary, args...)) } func dockerCmdWithStdoutStderr(c *check.C, args ...string) (string, string, int) { stdout, stderr, status, err := runCommandWithStdoutStderr(exec.Command(dockerBinary, args...)) c.Assert(err, check.IsNil, check.Commentf("%q failed with errors: %s, %v", strings.Join(args, " "), stderr, err)) return stdout, stderr, status } func dockerCmd(c *check.C, args ...string) (string, int) { out, status, err := runCommandWithOutput(exec.Command(dockerBinary, args...)) c.Assert(err, check.IsNil, check.Commentf("%q failed with errors: %s, %v", strings.Join(args, " "), out, err)) return out, status } // execute a docker command with a timeout func dockerCmdWithTimeout(timeout time.Duration, args ...string) (string, int, error) { out, status, err := runCommandWithOutputAndTimeout(exec.Command(dockerBinary, args...), timeout) if err != nil { return out, status, fmt.Errorf("%q failed with errors: %v : %q)", strings.Join(args, " "), err, out) } return out, status, err } // execute a docker command in a directory func dockerCmdInDir(c *check.C, path string, args ...string) (string, int, error) { dockerCommand := exec.Command(dockerBinary, args...) dockerCommand.Dir = path out, status, err := runCommandWithOutput(dockerCommand) if err != nil { return out, status, fmt.Errorf("%q failed with errors: %v : %q)", strings.Join(args, " "), err, out) } return out, status, err } // execute a docker command in a directory with a timeout func dockerCmdInDirWithTimeout(timeout time.Duration, path string, args ...string) (string, int, error) { dockerCommand := exec.Command(dockerBinary, args...) dockerCommand.Dir = path out, status, err := runCommandWithOutputAndTimeout(dockerCommand, timeout) if err != nil { return out, status, fmt.Errorf("%q failed with errors: %v : %q)", strings.Join(args, " "), err, out) } return out, status, err } func findContainerIP(c *check.C, id string, vargs ...string) string { args := append(vargs, "inspect", "--format='{{ .NetworkSettings.IPAddress }}'", id) cmd := exec.Command(dockerBinary, args...) out, _, err := runCommandWithOutput(cmd) if err != nil { c.Fatal(err, out) } return strings.Trim(out, " \r\n'") } func (d *Daemon) findContainerIP(id string) string { return findContainerIP(d.c, id, "--host", d.sock()) } func getContainerCount() (int, error) { const containers = "Containers:" cmd := exec.Command(dockerBinary, "info") out, _, err := runCommandWithOutput(cmd) if err != nil { return 0, err } lines := strings.Split(out, "\n") for _, line := range lines { if strings.Contains(line, containers) { output := strings.TrimSpace(line) output = strings.TrimLeft(output, containers) output = strings.Trim(output, " ") containerCount, err := strconv.Atoi(output) if err != nil { return 0, err } return containerCount, nil } } return 0, fmt.Errorf("couldn't find the Container count in the output") } // FakeContext creates directories that can be used as a build context type FakeContext struct { Dir string } // Add a file at a path, creating directories where necessary func (f *FakeContext) Add(file, content string) error { return f.addFile(file, []byte(content)) } func (f *FakeContext) addFile(file string, content []byte) error { filepath := path.Join(f.Dir, file) dirpath := path.Dir(filepath) if dirpath != "." { if err := os.MkdirAll(dirpath, 0755); err != nil { return err } } return ioutil.WriteFile(filepath, content, 0644) } // Delete a file at a path func (f *FakeContext) Delete(file string) error { filepath := path.Join(f.Dir, file) return os.RemoveAll(filepath) } // Close deletes the context func (f *FakeContext) Close() error { return os.RemoveAll(f.Dir) } func fakeContextFromNewTempDir() (*FakeContext, error) { tmp, err := ioutil.TempDir("", "fake-context") if err != nil { return nil, err } if err := os.Chmod(tmp, 0755); err != nil { return nil, err } return fakeContextFromDir(tmp), nil } func fakeContextFromDir(dir string) *FakeContext { return &FakeContext{dir} } func fakeContextWithFiles(files map[string]string) (*FakeContext, error) { ctx, err := fakeContextFromNewTempDir() if err != nil { return nil, err } for file, content := range files { if err := ctx.Add(file, content); err != nil { ctx.Close() return nil, err } } return ctx, nil } func fakeContextAddDockerfile(ctx *FakeContext, dockerfile string) error { if err := ctx.Add("Dockerfile", dockerfile); err != nil { ctx.Close() return err } return nil } func fakeContext(dockerfile string, files map[string]string) (*FakeContext, error) { ctx, err := fakeContextWithFiles(files) if err != nil { return nil, err } if err := fakeContextAddDockerfile(ctx, dockerfile); err != nil { return nil, err } return ctx, nil } // FakeStorage is a static file server. It might be running locally or remotely // on test host. type FakeStorage interface { Close() error URL() string CtxDir() string } func fakeBinaryStorage(archives map[string]*bytes.Buffer) (FakeStorage, error) { ctx, err := fakeContextFromNewTempDir() if err != nil { return nil, err } for name, content := range archives { if err := ctx.addFile(name, content.Bytes()); err != nil { return nil, err } } return fakeStorageWithContext(ctx) } // fakeStorage returns either a local or remote (at daemon machine) file server func fakeStorage(files map[string]string) (FakeStorage, error) { ctx, err := fakeContextWithFiles(files) if err != nil { return nil, err } return fakeStorageWithContext(ctx) } // fakeStorageWithContext returns either a local or remote (at daemon machine) file server func fakeStorageWithContext(ctx *FakeContext) (FakeStorage, error) { if isLocalDaemon { return newLocalFakeStorage(ctx) } return newRemoteFileServer(ctx) } // localFileStorage is a file storage on the running machine type localFileStorage struct { *FakeContext *httptest.Server } func (s *localFileStorage) URL() string { return s.Server.URL } func (s *localFileStorage) CtxDir() string { return s.FakeContext.Dir } func (s *localFileStorage) Close() error { defer s.Server.Close() return s.FakeContext.Close() } func newLocalFakeStorage(ctx *FakeContext) (*localFileStorage, error) { handler := http.FileServer(http.Dir(ctx.Dir)) server := httptest.NewServer(handler) return &localFileStorage{ FakeContext: ctx, Server: server, }, nil } // remoteFileServer is a containerized static file server started on the remote // testing machine to be used in URL-accepting docker build functionality. type remoteFileServer struct { host string // hostname/port web server is listening to on docker host e.g. 0.0.0.0:43712 container string image string ctx *FakeContext } func (f *remoteFileServer) URL() string { u := url.URL{ Scheme: "http", Host: f.host} return u.String() } func (f *remoteFileServer) CtxDir() string { return f.ctx.Dir } func (f *remoteFileServer) Close() error { defer func() { if f.ctx != nil { f.ctx.Close() } if f.image != "" { deleteImages(f.image) } }() if f.container == "" { return nil } return deleteContainer(f.container) } func newRemoteFileServer(ctx *FakeContext) (*remoteFileServer, error) { var ( image = fmt.Sprintf("fileserver-img-%s", strings.ToLower(stringutils.GenerateRandomAlphaOnlyString(10))) container = fmt.Sprintf("fileserver-cnt-%s", strings.ToLower(stringutils.GenerateRandomAlphaOnlyString(10))) ) // Build the image if err := fakeContextAddDockerfile(ctx, `FROM httpserver COPY . /static`); err != nil { return nil, fmt.Errorf("Cannot add Dockerfile to context: %v", err) } if _, err := buildImageFromContext(image, ctx, false); err != nil { return nil, fmt.Errorf("failed building file storage container image: %v", err) } // Start the container runCmd := exec.Command(dockerBinary, "run", "-d", "-P", "--name", container, image) if out, ec, err := runCommandWithOutput(runCmd); err != nil { return nil, fmt.Errorf("failed to start file storage container. ec=%v\nout=%s\nerr=%v", ec, out, err) } // Find out the system assigned port out, _, err := runCommandWithOutput(exec.Command(dockerBinary, "port", container, "80/tcp")) if err != nil { return nil, fmt.Errorf("failed to find container port: err=%v\nout=%s", err, out) } fileserverHostPort := strings.Trim(out, "\n") _, port, err := net.SplitHostPort(fileserverHostPort) if err != nil { return nil, fmt.Errorf("unable to parse file server host:port: %v", err) } dockerHostURL, err := url.Parse(daemonHost()) if err != nil { return nil, fmt.Errorf("unable to parse daemon host URL: %v", err) } host, _, err := net.SplitHostPort(dockerHostURL.Host) if err != nil { return nil, fmt.Errorf("unable to parse docker daemon host:port: %v", err) } return &remoteFileServer{ container: container, image: image, host: fmt.Sprintf("%s:%s", host, port), ctx: ctx}, nil } func inspectFieldAndMarshall(name, field string, output interface{}) error { str, err := inspectFieldJSON(name, field) if err != nil { return err } return json.Unmarshal([]byte(str), output) } func inspectFilter(name, filter string) (string, error) { format := fmt.Sprintf("{{%s}}", filter) inspectCmd := exec.Command(dockerBinary, "inspect", "-f", format, name) out, exitCode, err := runCommandWithOutput(inspectCmd) if err != nil || exitCode != 0 { return "", fmt.Errorf("failed to inspect container %s: %s", name, out) } return strings.TrimSpace(out), nil } func inspectField(name, field string) (string, error) { return inspectFilter(name, fmt.Sprintf(".%s", field)) } func inspectFieldJSON(name, field string) (string, error) { return inspectFilter(name, fmt.Sprintf("json .%s", field)) } func inspectFieldMap(name, path, field string) (string, error) { return inspectFilter(name, fmt.Sprintf("index .%s %q", path, field)) } func inspectMountSourceField(name, destination string) (string, error) { m, err := inspectMountPoint(name, destination) if err != nil { return "", err } return m.Source, nil } func inspectMountPoint(name, destination string) (types.MountPoint, error) { out, err := inspectFieldJSON(name, "Mounts") if err != nil { return types.MountPoint{}, err } return inspectMountPointJSON(out, destination) } var errMountNotFound = errors.New("mount point not found") func inspectMountPointJSON(j, destination string) (types.MountPoint, error) { var mp []types.MountPoint if err := unmarshalJSON([]byte(j), &mp); err != nil { return types.MountPoint{}, err } var m *types.MountPoint for _, c := range mp { if c.Destination == destination { m = &c break } } if m == nil { return types.MountPoint{}, errMountNotFound } return *m, nil } func getIDByName(name string) (string, error) { return inspectField(name, "Id") } // getContainerState returns the exit code of the container // and true if it's running // the exit code should be ignored if it's running func getContainerState(c *check.C, id string) (int, bool, error) { var ( exitStatus int running bool ) out, exitCode := dockerCmd(c, "inspect", "--format={{.State.Running}} {{.State.ExitCode}}", id) if exitCode != 0 { return 0, false, fmt.Errorf("%q doesn't exist: %s", id, out) } out = strings.Trim(out, "\n") splitOutput := strings.Split(out, " ") if len(splitOutput) != 2 { return 0, false, fmt.Errorf("failed to get container state: output is broken") } if splitOutput[0] == "true" { running = true } if n, err := strconv.Atoi(splitOutput[1]); err == nil { exitStatus = n } else { return 0, false, fmt.Errorf("failed to get container state: couldn't parse integer") } return exitStatus, running, nil } func buildImageCmd(name, dockerfile string, useCache bool) *exec.Cmd { args := []string{"-D", "build", "-t", name} if !useCache { args = append(args, "--no-cache") } args = append(args, "-") buildCmd := exec.Command(dockerBinary, args...) buildCmd.Stdin = strings.NewReader(dockerfile) return buildCmd } func buildImageWithOut(name, dockerfile string, useCache bool) (string, string, error) { buildCmd := buildImageCmd(name, dockerfile, useCache) out, exitCode, err := runCommandWithOutput(buildCmd) if err != nil || exitCode != 0 { return "", out, fmt.Errorf("failed to build the image: %s", out) } id, err := getIDByName(name) if err != nil { return "", out, err } return id, out, nil } func buildImageWithStdoutStderr(name, dockerfile string, useCache bool) (string, string, string, error) { buildCmd := buildImageCmd(name, dockerfile, useCache) stdout, stderr, exitCode, err := runCommandWithStdoutStderr(buildCmd) if err != nil || exitCode != 0 { return "", stdout, stderr, fmt.Errorf("failed to build the image: %s", stdout) } id, err := getIDByName(name) if err != nil { return "", stdout, stderr, err } return id, stdout, stderr, nil } func buildImage(name, dockerfile string, useCache bool) (string, error) { id, _, err := buildImageWithOut(name, dockerfile, useCache) return id, err } func buildImageFromContext(name string, ctx *FakeContext, useCache bool) (string, error) { args := []string{"build", "-t", name} if !useCache { args = append(args, "--no-cache") } args = append(args, ".") buildCmd := exec.Command(dockerBinary, args...) buildCmd.Dir = ctx.Dir out, exitCode, err := runCommandWithOutput(buildCmd) if err != nil || exitCode != 0 { return "", fmt.Errorf("failed to build the image: %s", out) } return getIDByName(name) } func buildImageFromPath(name, path string, useCache bool) (string, error) { args := []string{"build", "-t", name} if !useCache { args = append(args, "--no-cache") } args = append(args, path) buildCmd := exec.Command(dockerBinary, args...) out, exitCode, err := runCommandWithOutput(buildCmd) if err != nil || exitCode != 0 { return "", fmt.Errorf("failed to build the image: %s", out) } return getIDByName(name) } type gitServer interface { URL() string Close() error } type localGitServer struct { *httptest.Server } func (r *localGitServer) Close() error { r.Server.Close() return nil } func (r *localGitServer) URL() string { return r.Server.URL } type fakeGit struct { root string server gitServer RepoURL string } func (g *fakeGit) Close() { g.server.Close() os.RemoveAll(g.root) } func newFakeGit(name string, files map[string]string, enforceLocalServer bool) (*fakeGit, error) { ctx, err := fakeContextWithFiles(files) if err != nil { return nil, err } defer ctx.Close() curdir, err := os.Getwd() if err != nil { return nil, err } defer os.Chdir(curdir) if output, err := exec.Command("git", "init", ctx.Dir).CombinedOutput(); err != nil { return nil, fmt.Errorf("error trying to init repo: %s (%s)", err, output) } err = os.Chdir(ctx.Dir) if err != nil { return nil, err } if output, err := exec.Command("git", "config", "user.name", "Fake User").CombinedOutput(); err != nil { return nil, fmt.Errorf("error trying to set 'user.name': %s (%s)", err, output) } if output, err := exec.Command("git", "config", "user.email", "fake.user@example.com").CombinedOutput(); err != nil { return nil, fmt.Errorf("error trying to set 'user.email': %s (%s)", err, output) } if output, err := exec.Command("git", "add", "*").CombinedOutput(); err != nil { return nil, fmt.Errorf("error trying to add files to repo: %s (%s)", err, output) } if output, err := exec.Command("git", "commit", "-a", "-m", "Initial commit").CombinedOutput(); err != nil { return nil, fmt.Errorf("error trying to commit to repo: %s (%s)", err, output) } root, err := ioutil.TempDir("", "docker-test-git-repo") if err != nil { return nil, err } repoPath := filepath.Join(root, name+".git") if output, err := exec.Command("git", "clone", "--bare", ctx.Dir, repoPath).CombinedOutput(); err != nil { os.RemoveAll(root) return nil, fmt.Errorf("error trying to clone --bare: %s (%s)", err, output) } err = os.Chdir(repoPath) if err != nil { os.RemoveAll(root) return nil, err } if output, err := exec.Command("git", "update-server-info").CombinedOutput(); err != nil { os.RemoveAll(root) return nil, fmt.Errorf("error trying to git update-server-info: %s (%s)", err, output) } err = os.Chdir(curdir) if err != nil { os.RemoveAll(root) return nil, err } var server gitServer if !enforceLocalServer { // use fakeStorage server, which might be local or remote (at test daemon) server, err = fakeStorageWithContext(fakeContextFromDir(root)) if err != nil { return nil, fmt.Errorf("cannot start fake storage: %v", err) } } else { // always start a local http server on CLI test machin httpServer := httptest.NewServer(http.FileServer(http.Dir(root))) server = &localGitServer{httpServer} } return &fakeGit{ root: root, server: server, RepoURL: fmt.Sprintf("%s/%s.git", server.URL(), name), }, nil } // Write `content` to the file at path `dst`, creating it if necessary, // as well as any missing directories. // The file is truncated if it already exists. // Call c.Fatal() at the first error. func writeFile(dst, content string, c *check.C) { // Create subdirectories if necessary if err := os.MkdirAll(path.Dir(dst), 0700); err != nil { c.Fatal(err) } f, err := os.OpenFile(dst, os.O_CREATE|os.O_RDWR|os.O_TRUNC, 0700) if err != nil { c.Fatal(err) } defer f.Close() // Write content (truncate if it exists) if _, err := io.Copy(f, strings.NewReader(content)); err != nil { c.Fatal(err) } } // Return the contents of file at path `src`. // Call c.Fatal() at the first error (including if the file doesn't exist) func readFile(src string, c *check.C) (content string) { data, err := ioutil.ReadFile(src) if err != nil { c.Fatal(err) } return string(data) } func containerStorageFile(containerID, basename string) string { return filepath.Join("/var/lib/docker/containers", containerID, basename) } // docker commands that use this function must be run with the '-d' switch. func runCommandAndReadContainerFile(filename string, cmd *exec.Cmd) ([]byte, error) { out, _, err := runCommandWithOutput(cmd) if err != nil { return nil, fmt.Errorf("%v: %q", err, out) } time.Sleep(1 * time.Second) contID := strings.TrimSpace(out) return readContainerFile(contID, filename) } func readContainerFile(containerID, filename string) ([]byte, error) { f, err := os.Open(containerStorageFile(containerID, filename)) if err != nil { return nil, err } defer f.Close() content, err := ioutil.ReadAll(f) if err != nil { return nil, err } return content, nil } func readContainerFileWithExec(containerID, filename string) ([]byte, error) { out, _, err := runCommandWithOutput(exec.Command(dockerBinary, "exec", containerID, "cat", filename)) return []byte(out), err } // daemonTime provides the current time on the daemon host func daemonTime(c *check.C) time.Time { if isLocalDaemon { return time.Now() } status, body, err := sockRequest("GET", "/info", nil) c.Assert(status, check.Equals, http.StatusOK) c.Assert(err, check.IsNil) type infoJSON struct { SystemTime string } var info infoJSON if err = json.Unmarshal(body, &info); err != nil { c.Fatalf("unable to unmarshal /info response: %v", err) } dt, err := time.Parse(time.RFC3339Nano, info.SystemTime) if err != nil { c.Fatal(err) } return dt } func setupRegistry(c *check.C) *testRegistryV2 { testRequires(c, RegistryHosting) reg, err := newTestRegistryV2(c) if err != nil { c.Fatal(err) } // Wait for registry to be ready to serve requests. for i := 0; i != 5; i++ { if err = reg.Ping(); err == nil { break } time.Sleep(100 * time.Millisecond) } if err != nil { c.Fatal("Timeout waiting for test registry to become available") } return reg } func setupNotary(c *check.C) *testNotary { testRequires(c, NotaryHosting) ts, err := newTestNotary(c) if err != nil { c.Fatal(err) } return ts } // appendBaseEnv appends the minimum set of environment variables to exec the // docker cli binary for testing with correct configuration to the given env // list. func appendBaseEnv(env []string) []string { preserveList := []string{ // preserve remote test host "DOCKER_HOST", // windows: requires preserving SystemRoot, otherwise dial tcp fails // with "GetAddrInfoW: A non-recoverable error occurred during a database lookup." "SystemRoot", } for _, key := range preserveList { if val := os.Getenv(key); val != "" { env = append(env, fmt.Sprintf("%s=%s", key, val)) } } return env } func createTmpFile(c *check.C, content string) string { f, err := ioutil.TempFile("", "testfile") c.Assert(err, check.IsNil) filename := f.Name() err = ioutil.WriteFile(filename, []byte(content), 0644) c.Assert(err, check.IsNil) return filename }