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