363 lines
11 KiB
Go
363 lines
11 KiB
Go
package main
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import (
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"encoding/json"
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"fmt"
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"io/ioutil"
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"os"
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"os/exec"
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"path/filepath"
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"runtime"
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"strings"
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"github.com/docker/distribution"
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"github.com/docker/distribution/digest"
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"github.com/docker/distribution/manifest"
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"github.com/docker/distribution/manifest/manifestlist"
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"github.com/docker/distribution/manifest/schema2"
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"github.com/docker/docker/pkg/integration/checker"
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"github.com/go-check/check"
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)
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// testPullImageWithAliases pulls a specific image tag and verifies that any aliases (i.e., other
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// tags for the same image) are not also pulled down.
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//
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// Ref: docker/docker#8141
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func testPullImageWithAliases(c *check.C) {
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repoName := fmt.Sprintf("%v/dockercli/busybox", privateRegistryURL)
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repos := []string{}
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for _, tag := range []string{"recent", "fresh"} {
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repos = append(repos, fmt.Sprintf("%v:%v", repoName, tag))
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}
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// Tag and push the same image multiple times.
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for _, repo := range repos {
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dockerCmd(c, "tag", "busybox", repo)
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dockerCmd(c, "push", repo)
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}
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// Clear local images store.
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args := append([]string{"rmi"}, repos...)
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dockerCmd(c, args...)
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// Pull a single tag and verify it doesn't bring down all aliases.
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dockerCmd(c, "pull", repos[0])
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dockerCmd(c, "inspect", repos[0])
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for _, repo := range repos[1:] {
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_, _, err := dockerCmdWithError("inspect", repo)
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c.Assert(err, checker.NotNil, check.Commentf("Image %v shouldn't have been pulled down", repo))
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}
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}
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func (s *DockerRegistrySuite) TestPullImageWithAliases(c *check.C) {
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testPullImageWithAliases(c)
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}
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func (s *DockerSchema1RegistrySuite) TestPullImageWithAliases(c *check.C) {
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testPullImageWithAliases(c)
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}
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// testConcurrentPullWholeRepo pulls the same repo concurrently.
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func testConcurrentPullWholeRepo(c *check.C) {
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repoName := fmt.Sprintf("%v/dockercli/busybox", privateRegistryURL)
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repos := []string{}
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for _, tag := range []string{"recent", "fresh", "todays"} {
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repo := fmt.Sprintf("%v:%v", repoName, tag)
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_, err := buildImage(repo, fmt.Sprintf(`
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FROM busybox
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ENTRYPOINT ["/bin/echo"]
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ENV FOO foo
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ENV BAR bar
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CMD echo %s
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`, repo), true)
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c.Assert(err, checker.IsNil)
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dockerCmd(c, "push", repo)
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repos = append(repos, repo)
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}
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// Clear local images store.
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args := append([]string{"rmi"}, repos...)
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dockerCmd(c, args...)
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// Run multiple re-pulls concurrently
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results := make(chan error)
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numPulls := 3
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for i := 0; i != numPulls; i++ {
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go func() {
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_, _, err := runCommandWithOutput(exec.Command(dockerBinary, "pull", "-a", repoName))
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results <- err
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}()
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}
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// These checks are separate from the loop above because the check
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// package is not goroutine-safe.
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for i := 0; i != numPulls; i++ {
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err := <-results
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c.Assert(err, checker.IsNil, check.Commentf("concurrent pull failed with error: %v", err))
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}
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// Ensure all tags were pulled successfully
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for _, repo := range repos {
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dockerCmd(c, "inspect", repo)
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out, _ := dockerCmd(c, "run", "--rm", repo)
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c.Assert(strings.TrimSpace(out), checker.Equals, "/bin/sh -c echo "+repo)
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}
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}
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func (s *DockerRegistrySuite) testConcurrentPullWholeRepo(c *check.C) {
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testConcurrentPullWholeRepo(c)
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}
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func (s *DockerSchema1RegistrySuite) testConcurrentPullWholeRepo(c *check.C) {
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testConcurrentPullWholeRepo(c)
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}
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// testConcurrentFailingPull tries a concurrent pull that doesn't succeed.
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func testConcurrentFailingPull(c *check.C) {
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repoName := fmt.Sprintf("%v/dockercli/busybox", privateRegistryURL)
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// Run multiple pulls concurrently
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results := make(chan error)
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numPulls := 3
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for i := 0; i != numPulls; i++ {
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go func() {
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_, _, err := runCommandWithOutput(exec.Command(dockerBinary, "pull", repoName+":asdfasdf"))
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results <- err
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}()
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}
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// These checks are separate from the loop above because the check
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// package is not goroutine-safe.
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for i := 0; i != numPulls; i++ {
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err := <-results
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c.Assert(err, checker.NotNil, check.Commentf("expected pull to fail"))
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}
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}
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func (s *DockerRegistrySuite) testConcurrentFailingPull(c *check.C) {
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testConcurrentFailingPull(c)
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}
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func (s *DockerSchema1RegistrySuite) testConcurrentFailingPull(c *check.C) {
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testConcurrentFailingPull(c)
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}
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// testConcurrentPullMultipleTags pulls multiple tags from the same repo
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// concurrently.
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func testConcurrentPullMultipleTags(c *check.C) {
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repoName := fmt.Sprintf("%v/dockercli/busybox", privateRegistryURL)
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repos := []string{}
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for _, tag := range []string{"recent", "fresh", "todays"} {
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repo := fmt.Sprintf("%v:%v", repoName, tag)
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_, err := buildImage(repo, fmt.Sprintf(`
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FROM busybox
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ENTRYPOINT ["/bin/echo"]
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ENV FOO foo
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ENV BAR bar
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CMD echo %s
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`, repo), true)
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c.Assert(err, checker.IsNil)
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dockerCmd(c, "push", repo)
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repos = append(repos, repo)
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}
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// Clear local images store.
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args := append([]string{"rmi"}, repos...)
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dockerCmd(c, args...)
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// Re-pull individual tags, in parallel
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results := make(chan error)
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for _, repo := range repos {
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go func(repo string) {
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_, _, err := runCommandWithOutput(exec.Command(dockerBinary, "pull", repo))
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results <- err
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}(repo)
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}
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// These checks are separate from the loop above because the check
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// package is not goroutine-safe.
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for range repos {
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err := <-results
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c.Assert(err, checker.IsNil, check.Commentf("concurrent pull failed with error: %v", err))
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}
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// Ensure all tags were pulled successfully
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for _, repo := range repos {
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dockerCmd(c, "inspect", repo)
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out, _ := dockerCmd(c, "run", "--rm", repo)
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c.Assert(strings.TrimSpace(out), checker.Equals, "/bin/sh -c echo "+repo)
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}
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}
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func (s *DockerRegistrySuite) TestConcurrentPullMultipleTags(c *check.C) {
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testConcurrentPullMultipleTags(c)
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}
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func (s *DockerSchema1RegistrySuite) TestConcurrentPullMultipleTags(c *check.C) {
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testConcurrentPullMultipleTags(c)
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}
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// testPullIDStability verifies that pushing an image and pulling it back
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// preserves the image ID.
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func testPullIDStability(c *check.C) {
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derivedImage := privateRegistryURL + "/dockercli/id-stability"
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baseImage := "busybox"
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_, err := buildImage(derivedImage, fmt.Sprintf(`
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FROM %s
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ENV derived true
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ENV asdf true
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RUN dd if=/dev/zero of=/file bs=1024 count=1024
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CMD echo %s
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`, baseImage, derivedImage), true)
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if err != nil {
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c.Fatal(err)
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}
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originalID, err := getIDByName(derivedImage)
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if err != nil {
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c.Fatalf("error inspecting: %v", err)
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}
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dockerCmd(c, "push", derivedImage)
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// Pull
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out, _ := dockerCmd(c, "pull", derivedImage)
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if strings.Contains(out, "Pull complete") {
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c.Fatalf("repull redownloaded a layer: %s", out)
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}
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derivedIDAfterPull, err := getIDByName(derivedImage)
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if err != nil {
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c.Fatalf("error inspecting: %v", err)
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}
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if derivedIDAfterPull != originalID {
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c.Fatal("image's ID unexpectedly changed after a repush/repull")
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}
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// Make sure the image runs correctly
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out, _ = dockerCmd(c, "run", "--rm", derivedImage)
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if strings.TrimSpace(out) != derivedImage {
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c.Fatalf("expected %s; got %s", derivedImage, out)
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}
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// Confirm that repushing and repulling does not change the computed ID
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dockerCmd(c, "push", derivedImage)
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dockerCmd(c, "rmi", derivedImage)
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dockerCmd(c, "pull", derivedImage)
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derivedIDAfterPull, err = getIDByName(derivedImage)
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if err != nil {
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c.Fatalf("error inspecting: %v", err)
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}
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if derivedIDAfterPull != originalID {
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c.Fatal("image's ID unexpectedly changed after a repush/repull")
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}
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if err != nil {
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c.Fatalf("error inspecting: %v", err)
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}
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// Make sure the image still runs
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out, _ = dockerCmd(c, "run", "--rm", derivedImage)
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if strings.TrimSpace(out) != derivedImage {
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c.Fatalf("expected %s; got %s", derivedImage, out)
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}
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}
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func (s *DockerRegistrySuite) TestPullIDStability(c *check.C) {
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testPullIDStability(c)
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}
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func (s *DockerSchema1RegistrySuite) TestPullIDStability(c *check.C) {
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testPullIDStability(c)
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}
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func (s *DockerRegistrySuite) TestPullManifestList(c *check.C) {
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testRequires(c, NotArm)
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pushDigest, err := setupImage(c)
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c.Assert(err, checker.IsNil, check.Commentf("error setting up image"))
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// Inject a manifest list into the registry
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manifestList := &manifestlist.ManifestList{
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Versioned: manifest.Versioned{
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SchemaVersion: 2,
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MediaType: manifestlist.MediaTypeManifestList,
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},
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Manifests: []manifestlist.ManifestDescriptor{
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{
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Descriptor: distribution.Descriptor{
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Digest: "sha256:1a9ec845ee94c202b2d5da74a24f0ed2058318bfa9879fa541efaecba272e86b",
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Size: 3253,
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MediaType: schema2.MediaTypeManifest,
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},
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Platform: manifestlist.PlatformSpec{
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Architecture: "bogus_arch",
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OS: "bogus_os",
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},
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},
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{
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Descriptor: distribution.Descriptor{
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Digest: pushDigest,
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Size: 3253,
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MediaType: schema2.MediaTypeManifest,
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},
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Platform: manifestlist.PlatformSpec{
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Architecture: runtime.GOARCH,
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OS: runtime.GOOS,
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},
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},
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},
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}
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manifestListJSON, err := json.MarshalIndent(manifestList, "", " ")
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c.Assert(err, checker.IsNil, check.Commentf("error marshalling manifest list"))
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manifestListDigest := digest.FromBytes(manifestListJSON)
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hexDigest := manifestListDigest.Hex()
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registryV2Path := filepath.Join(s.reg.dir, "docker", "registry", "v2")
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// Write manifest list to blob store
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blobDir := filepath.Join(registryV2Path, "blobs", "sha256", hexDigest[:2], hexDigest)
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err = os.MkdirAll(blobDir, 0755)
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c.Assert(err, checker.IsNil, check.Commentf("error creating blob dir"))
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blobPath := filepath.Join(blobDir, "data")
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err = ioutil.WriteFile(blobPath, []byte(manifestListJSON), 0644)
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c.Assert(err, checker.IsNil, check.Commentf("error writing manifest list"))
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// Add to revision store
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revisionDir := filepath.Join(registryV2Path, "repositories", remoteRepoName, "_manifests", "revisions", "sha256", hexDigest)
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err = os.Mkdir(revisionDir, 0755)
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c.Assert(err, checker.IsNil, check.Commentf("error creating revision dir"))
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revisionPath := filepath.Join(revisionDir, "link")
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err = ioutil.WriteFile(revisionPath, []byte(manifestListDigest.String()), 0644)
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c.Assert(err, checker.IsNil, check.Commentf("error writing revision link"))
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// Update tag
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tagPath := filepath.Join(registryV2Path, "repositories", remoteRepoName, "_manifests", "tags", "latest", "current", "link")
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err = ioutil.WriteFile(tagPath, []byte(manifestListDigest.String()), 0644)
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c.Assert(err, checker.IsNil, check.Commentf("error writing tag link"))
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// Verify that the image can be pulled through the manifest list.
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out, _ := dockerCmd(c, "pull", repoName)
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// The pull output includes "Digest: <digest>", so find that
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matches := digestRegex.FindStringSubmatch(out)
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c.Assert(matches, checker.HasLen, 2, check.Commentf("unable to parse digest from pull output: %s", out))
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pullDigest := matches[1]
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// Make sure the pushed and pull digests match
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c.Assert(manifestListDigest.String(), checker.Equals, pullDigest)
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// Was the image actually created?
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dockerCmd(c, "inspect", repoName)
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dockerCmd(c, "rmi", repoName)
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}
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