package main import ( "fmt" "regexp" "strings" "time" "github.com/docker/distribution/digest" "github.com/docker/docker/pkg/integration/checker" "github.com/go-check/check" ) // TestPullFromCentralRegistry pulls an image from the central registry and verifies that the client // prints all expected output. func (s *DockerHubPullSuite) TestPullFromCentralRegistry(c *check.C) { testRequires(c, DaemonIsLinux) out := s.Cmd(c, "pull", "hello-world") defer deleteImages("hello-world") c.Assert(out, checker.Contains, "Using default tag: latest", check.Commentf("expected the 'latest' tag to be automatically assumed")) c.Assert(out, checker.Contains, "Pulling from library/hello-world", check.Commentf("expected the 'library/' prefix to be automatically assumed")) c.Assert(out, checker.Contains, "Downloaded newer image for hello-world:latest") matches := regexp.MustCompile(`Digest: (.+)\n`).FindAllStringSubmatch(out, -1) c.Assert(len(matches), checker.Equals, 1, check.Commentf("expected exactly one image digest in the output")) c.Assert(len(matches[0]), checker.Equals, 2, check.Commentf("unexpected number of submatches for the digest")) _, err := digest.ParseDigest(matches[0][1]) c.Check(err, checker.IsNil, check.Commentf("invalid digest %q in output", matches[0][1])) // We should have a single entry in images. img := strings.TrimSpace(s.Cmd(c, "images")) if splitImg := strings.Split(img, "\n"); len(splitImg) != 2 { c.Fatalf("expected only two lines in the output of `docker images`, got %d", len(splitImg)) } else if re := regexp.MustCompile(`^hello-world\s+latest`); !re.Match([]byte(splitImg[1])) { c.Fatal("invalid output for `docker images` (expected image and tag name") } } // TestPullNonExistingImage pulls non-existing images from the central registry, with different // combinations of implicit tag and library prefix. func (s *DockerHubPullSuite) TestPullNonExistingImage(c *check.C) { testRequires(c, DaemonIsLinux) for _, e := range []struct { Image string Alias string }{ {"library/asdfasdf:foobar", "asdfasdf:foobar"}, {"library/asdfasdf:foobar", "library/asdfasdf:foobar"}, {"library/asdfasdf:latest", "asdfasdf"}, {"library/asdfasdf:latest", "asdfasdf:latest"}, {"library/asdfasdf:latest", "library/asdfasdf"}, {"library/asdfasdf:latest", "library/asdfasdf:latest"}, } { out, err := s.CmdWithError("pull", e.Alias) c.Assert(err, checker.NotNil, check.Commentf("expected non-zero exit status when pulling non-existing image: %s", out)) c.Assert(out, checker.Contains, fmt.Sprintf("Error: image %s not found", e.Image), check.Commentf("expected image not found error messages")) } } // TestPullFromCentralRegistryImplicitRefParts pulls an image from the central registry and verifies // that pulling the same image with different combinations of implicit elements of the the image // reference (tag, repository, central registry url, ...) doesn't trigger a new pull nor leads to // multiple images. func (s *DockerHubPullSuite) TestPullFromCentralRegistryImplicitRefParts(c *check.C) { testRequires(c, DaemonIsLinux) s.Cmd(c, "pull", "hello-world") defer deleteImages("hello-world") for _, i := range []string{ "hello-world", "hello-world:latest", "library/hello-world", "library/hello-world:latest", "docker.io/library/hello-world", "index.docker.io/library/hello-world", } { out := s.Cmd(c, "pull", i) c.Assert(out, checker.Contains, "Image is up to date for hello-world:latest") } // We should have a single entry in images. img := strings.TrimSpace(s.Cmd(c, "images")) if splitImg := strings.Split(img, "\n"); len(splitImg) != 2 { c.Fatalf("expected only two lines in the output of `docker images`, got %d", len(splitImg)) } else if re := regexp.MustCompile(`^hello-world\s+latest`); !re.Match([]byte(splitImg[1])) { c.Fatal("invalid output for `docker images` (expected image and tag name") } } // TestPullScratchNotAllowed verifies that pulling 'scratch' is rejected. func (s *DockerHubPullSuite) TestPullScratchNotAllowed(c *check.C) { testRequires(c, DaemonIsLinux) out, err := s.CmdWithError("pull", "scratch") c.Assert(err, checker.NotNil, check.Commentf("expected pull of scratch to fail")) c.Assert(out, checker.Contains, "'scratch' is a reserved name") c.Assert(out, checker.Not(checker.Contains), "Pulling repository scratch") } // TestPullAllTagsFromCentralRegistry pulls using `all-tags` for a given image and verifies that it // results in more images than a naked pull. func (s *DockerHubPullSuite) TestPullAllTagsFromCentralRegistry(c *check.C) { testRequires(c, DaemonIsLinux) s.Cmd(c, "pull", "busybox") outImageCmd := s.Cmd(c, "images", "busybox") splitOutImageCmd := strings.Split(strings.TrimSpace(outImageCmd), "\n") c.Assert(splitOutImageCmd, checker.HasLen, 2, check.Commentf("expected a single entry in images\n%v", outImageCmd)) s.Cmd(c, "pull", "--all-tags=true", "busybox") outImageAllTagCmd := s.Cmd(c, "images", "busybox") if linesCount := strings.Count(outImageAllTagCmd, "\n"); linesCount <= 2 { c.Fatalf("pulling all tags should provide more images, got %d", linesCount-1) } // Verify that the line for 'busybox:latest' is left unchanged. var latestLine string for _, line := range strings.Split(outImageAllTagCmd, "\n") { if strings.HasPrefix(line, "busybox") && strings.Contains(line, "latest") { latestLine = line break } } c.Assert(latestLine, checker.Not(checker.Equals), "", check.Commentf("no entry for busybox:latest found after pulling all tags")) splitLatest := strings.Fields(latestLine) splitCurrent := strings.Fields(splitOutImageCmd[1]) c.Assert(splitLatest, checker.DeepEquals, splitCurrent, check.Commentf("busybox:latest was changed after pulling all tags")) } // TestPullClientDisconnect kills the client during a pull operation and verifies that the operation // still succesfully completes on the daemon side. // // Ref: docker/docker#15589 func (s *DockerHubPullSuite) TestPullClientDisconnect(c *check.C) { testRequires(c, DaemonIsLinux) repoName := "hello-world:latest" pullCmd := s.MakeCmd("pull", repoName) stdout, err := pullCmd.StdoutPipe() c.Assert(err, checker.IsNil) err = pullCmd.Start() c.Assert(err, checker.IsNil) // Cancel as soon as we get some output. buf := make([]byte, 10) _, err = stdout.Read(buf) c.Assert(err, checker.IsNil) err = pullCmd.Process.Kill() c.Assert(err, checker.IsNil) maxAttempts := 20 for i := 0; ; i++ { if _, err := s.CmdWithError("inspect", repoName); err == nil { break } if i >= maxAttempts { c.Fatal("timeout reached: image was not pulled after client disconnected") } time.Sleep(500 * time.Millisecond) } }