277 lines
10 KiB
Go
277 lines
10 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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"sync"
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"time"
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"github.com/go-check/check"
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"github.com/opencontainers/go-digest"
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"gotest.tools/assert"
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is "gotest.tools/assert/cmp"
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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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assert.Assert(c, strings.Contains(out, "Using default tag: latest"), "expected the 'latest' tag to be automatically assumed")
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assert.Assert(c, strings.Contains(out, "Pulling from library/hello-world"), "expected the 'library/' prefix to be automatically assumed")
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assert.Assert(c, strings.Contains(out, "Downloaded newer image for hello-world:latest"))
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matches := regexp.MustCompile(`Digest: (.+)\n`).FindAllStringSubmatch(out, -1)
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assert.Equal(c, len(matches), 1, "expected exactly one image digest in the output")
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assert.Equal(c, len(matches[0]), 2, "unexpected number of submatches for the digest")
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_, err := digest.Parse(matches[0][1])
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assert.NilError(c, err, "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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splitImg := strings.Split(img, "\n")
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assert.Equal(c, len(splitImg), 2)
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match, _ := regexp.MatchString(`hello-world\s+latest.*?`, splitImg[1])
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assert.Assert(c, match, "invalid output for `docker images` (expected image and tag name)")
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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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type entry struct {
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repo string
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alias string
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tag string
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}
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entries := []entry{
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{"asdfasdf", "asdfasdf", "foobar"},
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{"asdfasdf", "library/asdfasdf", "foobar"},
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{"asdfasdf", "asdfasdf", ""},
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{"asdfasdf", "asdfasdf", "latest"},
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{"asdfasdf", "library/asdfasdf", ""},
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{"asdfasdf", "library/asdfasdf", "latest"},
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}
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// The option field indicates "-a" or not.
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type record struct {
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e entry
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option string
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out string
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err error
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}
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// Execute 'docker pull' in parallel, pass results (out, err) and
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// necessary information ("-a" or not, and the image name) to channel.
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var group sync.WaitGroup
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recordChan := make(chan record, len(entries)*2)
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for _, e := range entries {
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group.Add(1)
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go func(e entry) {
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defer group.Done()
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repoName := e.alias
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if e.tag != "" {
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repoName += ":" + e.tag
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}
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out, err := s.CmdWithError("pull", repoName)
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recordChan <- record{e, "", out, err}
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}(e)
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if e.tag == "" {
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// pull -a on a nonexistent registry should fall back as well
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group.Add(1)
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go func(e entry) {
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defer group.Done()
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out, err := s.CmdWithError("pull", "-a", e.alias)
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recordChan <- record{e, "-a", out, err}
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}(e)
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}
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}
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// Wait for completion
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group.Wait()
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close(recordChan)
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// Process the results (out, err).
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for record := range recordChan {
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if len(record.option) == 0 {
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assert.ErrorContains(c, record.err, "", "expected non-zero exit status when pulling non-existing image: %s", record.out)
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assert.Assert(c, strings.Contains(record.out, fmt.Sprintf("pull access denied for %s, repository does not exist or may require 'docker login'", record.e.repo)), "expected image not found error messages")
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} else {
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// pull -a on a nonexistent registry should fall back as well
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assert.ErrorContains(c, record.err, "", "expected non-zero exit status when pulling non-existing image: %s", record.out)
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assert.Assert(c, strings.Contains(record.out, fmt.Sprintf("pull access denied for %s, repository does not exist or may require 'docker login'", record.e.repo)), "expected image not found error messages")
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assert.Assert(c, !strings.Contains(record.out, "unauthorized"), `message should not contain "unauthorized"`)
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}
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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 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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// Pull hello-world from v2
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pullFromV2 := func(ref string) (int, string) {
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out := s.Cmd(c, "pull", "hello-world")
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v1Retries := 0
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for strings.Contains(out, "this image was pulled from a legacy registry") {
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// Some network errors may cause fallbacks to the v1
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// protocol, which would violate the test's assumption
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// that it will get the same images. To make the test
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// more robust against these network glitches, allow a
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// few retries if we end up with a v1 pull.
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if v1Retries > 2 {
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c.Fatalf("too many v1 fallback incidents when pulling %s", ref)
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}
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s.Cmd(c, "rmi", ref)
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out = s.Cmd(c, "pull", ref)
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v1Retries++
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}
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return v1Retries, out
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}
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pullFromV2("hello-world")
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defer deleteImages("hello-world")
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s.Cmd(c, "tag", "hello-world", "hello-world-backup")
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for _, ref := 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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var out string
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for {
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var v1Retries int
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v1Retries, out = pullFromV2(ref)
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// Keep repeating the test case until we don't hit a v1
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// fallback case. We won't get the right "Image is up
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// to date" message if the local image was replaced
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// with one pulled from v1.
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if v1Retries == 0 {
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break
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}
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s.Cmd(c, "rmi", ref)
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s.Cmd(c, "tag", "hello-world-backup", "hello-world")
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}
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assert.Assert(c, strings.Contains(out, "Image is up to date for hello-world:latest"))
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}
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s.Cmd(c, "rmi", "hello-world-backup")
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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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splitImg := strings.Split(img, "\n")
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assert.Equal(c, len(splitImg), 2)
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match, _ := regexp.MatchString(`hello-world\s+latest.*?`, splitImg[1])
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assert.Assert(c, match, "invalid output for `docker images` (expected image and tag name)")
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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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assert.ErrorContains(c, err, "", "expected pull of scratch to fail")
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assert.Assert(c, strings.Contains(out, "'scratch' is a reserved name"))
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assert.Assert(c, !strings.Contains(out, "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", "dockercore/engine-pull-all-test-fixture")
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outImageCmd := s.Cmd(c, "images", "dockercore/engine-pull-all-test-fixture")
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splitOutImageCmd := strings.Split(strings.TrimSpace(outImageCmd), "\n")
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assert.Equal(c, len(splitOutImageCmd), 2)
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s.Cmd(c, "pull", "--all-tags=true", "dockercore/engine-pull-all-test-fixture")
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outImageAllTagCmd := s.Cmd(c, "images", "dockercore/engine-pull-all-test-fixture")
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linesCount := strings.Count(outImageAllTagCmd, "\n")
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assert.Assert(c, linesCount > 2, "pulling all tags should provide more than two images, got %s", outImageAllTagCmd)
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// Verify that the line for 'dockercore/engine-pull-all-test-fixture: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, "dockercore/engine-pull-all-test-fixture") && 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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assert.Assert(c, latestLine != "", "no entry for dockercore/engine-pull-all-test-fixture: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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// Clear relative creation times, since these can easily change between
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// two invocations of "docker images". Without this, the test can fail
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// like this:
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// ... obtained []string = []string{"busybox", "latest", "d9551b4026f0", "27", "minutes", "ago", "1.113", "MB"}
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// ... expected []string = []string{"busybox", "latest", "d9551b4026f0", "26", "minutes", "ago", "1.113", "MB"}
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splitLatest[3] = ""
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splitLatest[4] = ""
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splitLatest[5] = ""
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splitCurrent[3] = ""
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splitCurrent[4] = ""
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splitCurrent[5] = ""
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assert.Assert(c, is.DeepEqual(splitLatest, splitCurrent), "dockercore/engine-pull-all-test-fixture: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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// gets cancelled.
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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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assert.NilError(c, err)
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err = pullCmd.Start()
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assert.NilError(c, err)
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go pullCmd.Wait()
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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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assert.NilError(c, err)
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err = pullCmd.Process.Kill()
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assert.NilError(c, err)
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time.Sleep(2 * time.Second)
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_, err = s.CmdWithError("inspect", repoName)
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assert.ErrorContains(c, err, "", "image was pulled after client disconnected")
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}
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// Regression test for https://github.com/docker/docker/issues/26429
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func (s *DockerSuite) TestPullLinuxImageFailsOnWindows(c *check.C) {
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testRequires(c, DaemonIsWindows, Network)
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_, _, err := dockerCmdWithError("pull", "ubuntu")
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assert.ErrorContains(c, err, "no matching manifest for windows")
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}
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// Regression test for https://github.com/docker/docker/issues/28892
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func (s *DockerSuite) TestPullWindowsImageFailsOnLinux(c *check.C) {
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testRequires(c, DaemonIsLinux, Network)
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_, _, err := dockerCmdWithError("pull", "mcr.microsoft.com/windows/servercore:ltsc2019")
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assert.ErrorContains(c, err, "no matching manifest for linux")
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}
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