package main import ( "encoding/json" "fmt" "io/ioutil" "os" "os/exec" "path/filepath" "reflect" "regexp" "sort" "strings" "time" "github.com/docker/distribution/digest" "github.com/docker/docker/pkg/integration/checker" "github.com/go-check/check" ) // save a repo using gz compression and try to load it using stdout func (s *DockerSuite) TestSaveXzAndLoadRepoStdout(c *check.C) { testRequires(c, DaemonIsLinux) name := "test-save-xz-and-load-repo-stdout" dockerCmd(c, "run", "--name", name, "busybox", "true") repoName := "foobar-save-load-test-xz-gz" out, _ := dockerCmd(c, "commit", name, repoName) dockerCmd(c, "inspect", repoName) repoTarball, _, err := runCommandPipelineWithOutput( exec.Command(dockerBinary, "save", repoName), exec.Command("xz", "-c"), exec.Command("gzip", "-c")) c.Assert(err, checker.IsNil, check.Commentf("failed to save repo: %v %v", out, err)) deleteImages(repoName) loadCmd := exec.Command(dockerBinary, "load") loadCmd.Stdin = strings.NewReader(repoTarball) out, _, err = runCommandWithOutput(loadCmd) c.Assert(err, checker.NotNil, check.Commentf("expected error, but succeeded with no error and output: %v", out)) after, _, err := dockerCmdWithError("inspect", repoName) c.Assert(err, checker.NotNil, check.Commentf("the repo should not exist: %v", after)) } // save a repo using xz+gz compression and try to load it using stdout func (s *DockerSuite) TestSaveXzGzAndLoadRepoStdout(c *check.C) { testRequires(c, DaemonIsLinux) name := "test-save-xz-gz-and-load-repo-stdout" dockerCmd(c, "run", "--name", name, "busybox", "true") repoName := "foobar-save-load-test-xz-gz" dockerCmd(c, "commit", name, repoName) dockerCmd(c, "inspect", repoName) out, _, err := runCommandPipelineWithOutput( exec.Command(dockerBinary, "save", repoName), exec.Command("xz", "-c"), exec.Command("gzip", "-c")) c.Assert(err, checker.IsNil, check.Commentf("failed to save repo: %v %v", out, err)) deleteImages(repoName) loadCmd := exec.Command(dockerBinary, "load") loadCmd.Stdin = strings.NewReader(out) out, _, err = runCommandWithOutput(loadCmd) c.Assert(err, checker.NotNil, check.Commentf("expected error, but succeeded with no error and output: %v", out)) after, _, err := dockerCmdWithError("inspect", repoName) c.Assert(err, checker.NotNil, check.Commentf("the repo should not exist: %v", after)) } func (s *DockerSuite) TestSaveSingleTag(c *check.C) { testRequires(c, DaemonIsLinux) repoName := "foobar-save-single-tag-test" dockerCmd(c, "tag", "busybox:latest", fmt.Sprintf("%v:latest", repoName)) out, _ := dockerCmd(c, "images", "-q", "--no-trunc", repoName) cleanedImageID := strings.TrimSpace(out) out, _, err := runCommandPipelineWithOutput( exec.Command(dockerBinary, "save", fmt.Sprintf("%v:latest", repoName)), exec.Command("tar", "t"), exec.Command("grep", "-E", fmt.Sprintf("(^repositories$|%v)", cleanedImageID))) c.Assert(err, checker.IsNil, check.Commentf("failed to save repo with image ID and 'repositories' file: %s, %v", out, err)) } func (s *DockerSuite) TestSaveCheckTimes(c *check.C) { testRequires(c, DaemonIsLinux) repoName := "busybox:latest" out, _ := dockerCmd(c, "inspect", repoName) data := []struct { ID string Created time.Time }{} err := json.Unmarshal([]byte(out), &data) c.Assert(err, checker.IsNil, check.Commentf("failed to marshal from %q: err %v", repoName, err)) c.Assert(len(data), checker.Not(checker.Equals), 0, check.Commentf("failed to marshal the data from %q", repoName)) tarTvTimeFormat := "2006-01-02 15:04" out, _, err = runCommandPipelineWithOutput( exec.Command(dockerBinary, "save", repoName), exec.Command("tar", "tv"), exec.Command("grep", "-E", fmt.Sprintf("%s %s", data[0].Created.Format(tarTvTimeFormat), digest.Digest(data[0].ID).Hex()))) c.Assert(err, checker.IsNil, check.Commentf("failed to save repo with image ID and 'repositories' file: %s, %v", out, err)) } func (s *DockerSuite) TestSaveImageId(c *check.C) { testRequires(c, DaemonIsLinux) repoName := "foobar-save-image-id-test" dockerCmd(c, "tag", "emptyfs:latest", fmt.Sprintf("%v:latest", repoName)) out, _ := dockerCmd(c, "images", "-q", "--no-trunc", repoName) cleanedLongImageID := strings.TrimPrefix(strings.TrimSpace(out), "sha256:") out, _ = dockerCmd(c, "images", "-q", repoName) cleanedShortImageID := strings.TrimSpace(out) // Make sure IDs are not empty c.Assert(cleanedLongImageID, checker.Not(check.Equals), "", check.Commentf("Id should not be empty.")) c.Assert(cleanedShortImageID, checker.Not(check.Equals), "", check.Commentf("Id should not be empty.")) saveCmd := exec.Command(dockerBinary, "save", cleanedShortImageID) tarCmd := exec.Command("tar", "t") var err error tarCmd.Stdin, err = saveCmd.StdoutPipe() c.Assert(err, checker.IsNil, check.Commentf("cannot set stdout pipe for tar: %v", err)) grepCmd := exec.Command("grep", cleanedLongImageID) grepCmd.Stdin, err = tarCmd.StdoutPipe() c.Assert(err, checker.IsNil, check.Commentf("cannot set stdout pipe for grep: %v", err)) c.Assert(tarCmd.Start(), checker.IsNil, check.Commentf("tar failed with error: %v", err)) c.Assert(saveCmd.Start(), checker.IsNil, check.Commentf("docker save failed with error: %v", err)) defer func() { saveCmd.Wait() tarCmd.Wait() dockerCmd(c, "rmi", repoName) }() out, _, err = runCommandWithOutput(grepCmd) c.Assert(err, checker.IsNil, check.Commentf("failed to save repo with image ID: %s, %v", out, err)) } // save a repo and try to load it using flags func (s *DockerSuite) TestSaveAndLoadRepoFlags(c *check.C) { testRequires(c, DaemonIsLinux) name := "test-save-and-load-repo-flags" dockerCmd(c, "run", "--name", name, "busybox", "true") repoName := "foobar-save-load-test" deleteImages(repoName) dockerCmd(c, "commit", name, repoName) before, _ := dockerCmd(c, "inspect", repoName) out, _, err := runCommandPipelineWithOutput( exec.Command(dockerBinary, "save", repoName), exec.Command(dockerBinary, "load")) c.Assert(err, checker.IsNil, check.Commentf("failed to save and load repo: %s, %v", out, err)) after, _ := dockerCmd(c, "inspect", repoName) c.Assert(before, checker.Equals, after, check.Commentf("inspect is not the same after a save / load")) } func (s *DockerSuite) TestSaveWithNoExistImage(c *check.C) { testRequires(c, DaemonIsLinux) imgName := "foobar-non-existing-image" out, _, err := dockerCmdWithError("save", "-o", "test-img.tar", imgName) c.Assert(err, checker.NotNil, check.Commentf("save image should fail for non-existing image")) c.Assert(out, checker.Contains, fmt.Sprintf("No such image: %s", imgName)) } func (s *DockerSuite) TestSaveMultipleNames(c *check.C) { testRequires(c, DaemonIsLinux) repoName := "foobar-save-multi-name-test" // Make one image dockerCmd(c, "tag", "emptyfs:latest", fmt.Sprintf("%v-one:latest", repoName)) // Make two images dockerCmd(c, "tag", "emptyfs:latest", fmt.Sprintf("%v-two:latest", repoName)) out, _, err := runCommandPipelineWithOutput( exec.Command(dockerBinary, "save", fmt.Sprintf("%v-one", repoName), fmt.Sprintf("%v-two:latest", repoName)), exec.Command("tar", "xO", "repositories"), exec.Command("grep", "-q", "-E", "(-one|-two)"), ) c.Assert(err, checker.IsNil, check.Commentf("failed to save multiple repos: %s, %v", out, err)) } func (s *DockerSuite) TestSaveRepoWithMultipleImages(c *check.C) { testRequires(c, DaemonIsLinux) makeImage := func(from string, tag string) string { var ( out string ) out, _ = dockerCmd(c, "run", "-d", from, "true") cleanedContainerID := strings.TrimSpace(out) out, _ = dockerCmd(c, "commit", cleanedContainerID, tag) imageID := strings.TrimSpace(out) return imageID } repoName := "foobar-save-multi-images-test" tagFoo := repoName + ":foo" tagBar := repoName + ":bar" idFoo := makeImage("busybox:latest", tagFoo) idBar := makeImage("busybox:latest", tagBar) deleteImages(repoName) // create the archive out, _, err := runCommandPipelineWithOutput( exec.Command(dockerBinary, "save", repoName, "busybox:latest"), exec.Command("tar", "t")) c.Assert(err, checker.IsNil, check.Commentf("failed to save multiple images: %s, %v", out, err)) lines := strings.Split(strings.TrimSpace(out), "\n") var actual []string for _, l := range lines { if regexp.MustCompile("^[a-f0-9]{64}\\.json$").Match([]byte(l)) { actual = append(actual, strings.TrimSuffix(l, ".json")) } } // make the list of expected layers out = inspectField(c, "busybox:latest", "Id") expected := []string{strings.TrimSpace(out), idFoo, idBar} // prefixes are not in tar for i := range expected { expected[i] = digest.Digest(expected[i]).Hex() } sort.Strings(actual) sort.Strings(expected) c.Assert(actual, checker.DeepEquals, expected, check.Commentf("archive does not contains the right layers: got %v, expected %v, output: %q", actual, expected, out)) } // Issue #6722 #5892 ensure directories are included in changes func (s *DockerSuite) TestSaveDirectoryPermissions(c *check.C) { testRequires(c, DaemonIsLinux) layerEntries := []string{"opt/", "opt/a/", "opt/a/b/", "opt/a/b/c"} layerEntriesAUFS := []string{"./", ".wh..wh.aufs", ".wh..wh.orph/", ".wh..wh.plnk/", "opt/", "opt/a/", "opt/a/b/", "opt/a/b/c"} name := "save-directory-permissions" tmpDir, err := ioutil.TempDir("", "save-layers-with-directories") c.Assert(err, checker.IsNil, check.Commentf("failed to create temporary directory: %s", err)) extractionDirectory := filepath.Join(tmpDir, "image-extraction-dir") os.Mkdir(extractionDirectory, 0777) defer os.RemoveAll(tmpDir) _, err = buildImage(name, `FROM busybox RUN adduser -D user && mkdir -p /opt/a/b && chown -R user:user /opt/a RUN touch /opt/a/b/c && chown user:user /opt/a/b/c`, true) c.Assert(err, checker.IsNil, check.Commentf("%v", err)) out, _, err := runCommandPipelineWithOutput( exec.Command(dockerBinary, "save", name), exec.Command("tar", "-xf", "-", "-C", extractionDirectory), ) c.Assert(err, checker.IsNil, check.Commentf("failed to save and extract image: %s", out)) dirs, err := ioutil.ReadDir(extractionDirectory) c.Assert(err, checker.IsNil, check.Commentf("failed to get a listing of the layer directories: %s", err)) found := false for _, entry := range dirs { var entriesSansDev []string if entry.IsDir() { layerPath := filepath.Join(extractionDirectory, entry.Name(), "layer.tar") f, err := os.Open(layerPath) c.Assert(err, checker.IsNil, check.Commentf("failed to open %s: %s", layerPath, err)) entries, err := listTar(f) for _, e := range entries { if !strings.Contains(e, "dev/") { entriesSansDev = append(entriesSansDev, e) } } c.Assert(err, checker.IsNil, check.Commentf("encountered error while listing tar entries: %s", err)) if reflect.DeepEqual(entriesSansDev, layerEntries) || reflect.DeepEqual(entriesSansDev, layerEntriesAUFS) { found = true break } } } c.Assert(found, checker.Equals, true, check.Commentf("failed to find the layer with the right content listing")) } // Test loading a weird image where one of the layers is of zero size. // The layer.tar file is actually zero bytes, no padding or anything else. // See issue: 18170 func (s *DockerSuite) TestLoadZeroSizeLayer(c *check.C) { testRequires(c, DaemonIsLinux) dockerCmd(c, "load", "-i", "fixtures/load/emptyLayer.tar") } func (s *DockerSuite) TestSaveLoadParents(c *check.C) { testRequires(c, DaemonIsLinux) makeImage := func(from string, addfile string) string { var ( out string ) out, _ = dockerCmd(c, "run", "-d", from, "touch", addfile) cleanedContainerID := strings.TrimSpace(out) out, _ = dockerCmd(c, "commit", cleanedContainerID) imageID := strings.TrimSpace(out) dockerCmd(c, "rm", cleanedContainerID) return imageID } idFoo := makeImage("busybox", "foo") idBar := makeImage(idFoo, "bar") tmpDir, err := ioutil.TempDir("", "save-load-parents") c.Assert(err, checker.IsNil) defer os.RemoveAll(tmpDir) c.Log("tmpdir", tmpDir) outfile := filepath.Join(tmpDir, "out.tar") dockerCmd(c, "save", "-o", outfile, idBar, idFoo) dockerCmd(c, "rmi", idBar) dockerCmd(c, "load", "-i", outfile) inspectOut := inspectField(c, idBar, "Parent") c.Assert(inspectOut, checker.Equals, idFoo) inspectOut = inspectField(c, idFoo, "Parent") c.Assert(inspectOut, checker.Equals, "") }