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moby--moby/integration-cli/docker_cli_save_load_test.go

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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, "")
}