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moby--moby/integration-cli/docker_cli_by_digest_test.go

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package main
import (
"fmt"
"os/exec"
"regexp"
"strings"
"testing"
"github.com/docker/docker/utils"
)
var (
repoName = fmt.Sprintf("%v/dockercli/busybox-by-dgst", privateRegistryURL)
digestRegex = regexp.MustCompile("Digest: ([^\n]+)")
)
func setupImage() (string, error) {
return setupImageWithTag("latest")
}
func setupImageWithTag(tag string) (string, error) {
containerName := "busyboxbydigest"
c := exec.Command(dockerBinary, "run", "-d", "-e", "digest=1", "--name", containerName, "busybox")
if _, err := runCommand(c); err != nil {
return "", err
}
// tag the image to upload it to the private registry
repoAndTag := utils.ImageReference(repoName, tag)
c = exec.Command(dockerBinary, "commit", containerName, repoAndTag)
if out, _, err := runCommandWithOutput(c); err != nil {
return "", fmt.Errorf("image tagging failed: %s, %v", out, err)
}
defer deleteImages(repoAndTag)
// delete the container as we don't need it any more
if err := deleteContainer(containerName); err != nil {
return "", err
}
// push the image
c = exec.Command(dockerBinary, "push", repoAndTag)
out, _, err := runCommandWithOutput(c)
if err != nil {
return "", fmt.Errorf("pushing the image to the private registry has failed: %s, %v", out, err)
}
// delete our local repo that we previously tagged
c = exec.Command(dockerBinary, "rmi", repoAndTag)
if out, _, err := runCommandWithOutput(c); err != nil {
return "", fmt.Errorf("error deleting images prior to real test: %s, %v", out, err)
}
// the push output includes "Digest: <digest>", so find that
matches := digestRegex.FindStringSubmatch(out)
if len(matches) != 2 {
return "", fmt.Errorf("unable to parse digest from push output: %s", out)
}
pushDigest := matches[1]
return pushDigest, nil
}
func TestPullByTagDisplaysDigest(t *testing.T) {
defer setupRegistry(t)()
pushDigest, err := setupImage()
if err != nil {
t.Fatalf("error setting up image: %v", err)
}
// pull from the registry using the tag
c := exec.Command(dockerBinary, "pull", repoName)
out, _, err := runCommandWithOutput(c)
if err != nil {
t.Fatalf("error pulling by tag: %s, %v", out, err)
}
defer deleteImages(repoName)
// the pull output includes "Digest: <digest>", so find that
matches := digestRegex.FindStringSubmatch(out)
if len(matches) != 2 {
t.Fatalf("unable to parse digest from pull output: %s", out)
}
pullDigest := matches[1]
// make sure the pushed and pull digests match
if pushDigest != pullDigest {
t.Fatalf("push digest %q didn't match pull digest %q", pushDigest, pullDigest)
}
logDone("by_digest - pull by tag displays digest")
}
func TestPullByDigest(t *testing.T) {
defer setupRegistry(t)()
pushDigest, err := setupImage()
if err != nil {
t.Fatalf("error setting up image: %v", err)
}
// pull from the registry using the <name>@<digest> reference
imageReference := fmt.Sprintf("%s@%s", repoName, pushDigest)
c := exec.Command(dockerBinary, "pull", imageReference)
out, _, err := runCommandWithOutput(c)
if err != nil {
t.Fatalf("error pulling by digest: %s, %v", out, err)
}
defer deleteImages(imageReference)
// the pull output includes "Digest: <digest>", so find that
matches := digestRegex.FindStringSubmatch(out)
if len(matches) != 2 {
t.Fatalf("unable to parse digest from pull output: %s", out)
}
pullDigest := matches[1]
// make sure the pushed and pull digests match
if pushDigest != pullDigest {
t.Fatalf("push digest %q didn't match pull digest %q", pushDigest, pullDigest)
}
logDone("by_digest - pull by digest")
}
func TestCreateByDigest(t *testing.T) {
defer setupRegistry(t)()
pushDigest, err := setupImage()
if err != nil {
t.Fatalf("error setting up image: %v", err)
}
imageReference := fmt.Sprintf("%s@%s", repoName, pushDigest)
containerName := "createByDigest"
c := exec.Command(dockerBinary, "create", "--name", containerName, imageReference)
out, _, err := runCommandWithOutput(c)
if err != nil {
t.Fatalf("error creating by digest: %s, %v", out, err)
}
defer deleteContainer(containerName)
res, err := inspectField(containerName, "Config.Image")
if err != nil {
t.Fatalf("failed to get Config.Image: %s, %v", out, err)
}
if res != imageReference {
t.Fatalf("unexpected Config.Image: %s (expected %s)", res, imageReference)
}
logDone("by_digest - create by digest")
}
func TestRunByDigest(t *testing.T) {
defer setupRegistry(t)()
pushDigest, err := setupImage()
if err != nil {
t.Fatalf("error setting up image: %v", err)
}
imageReference := fmt.Sprintf("%s@%s", repoName, pushDigest)
containerName := "runByDigest"
c := exec.Command(dockerBinary, "run", "--name", containerName, imageReference, "sh", "-c", "echo found=$digest")
out, _, err := runCommandWithOutput(c)
if err != nil {
t.Fatalf("error run by digest: %s, %v", out, err)
}
defer deleteContainer(containerName)
foundRegex := regexp.MustCompile("found=([^\n]+)")
matches := foundRegex.FindStringSubmatch(out)
if len(matches) != 2 {
t.Fatalf("error locating expected 'found=1' output: %s", out)
}
if matches[1] != "1" {
t.Fatalf("Expected %q, got %q", "1", matches[1])
}
res, err := inspectField(containerName, "Config.Image")
if err != nil {
t.Fatalf("failed to get Config.Image: %s, %v", out, err)
}
if res != imageReference {
t.Fatalf("unexpected Config.Image: %s (expected %s)", res, imageReference)
}
logDone("by_digest - run by digest")
}
func TestRemoveImageByDigest(t *testing.T) {
defer setupRegistry(t)()
digest, err := setupImage()
if err != nil {
t.Fatalf("error setting up image: %v", err)
}
imageReference := fmt.Sprintf("%s@%s", repoName, digest)
// pull from the registry using the <name>@<digest> reference
c := exec.Command(dockerBinary, "pull", imageReference)
out, _, err := runCommandWithOutput(c)
if err != nil {
t.Fatalf("error pulling by digest: %s, %v", out, err)
}
// make sure inspect runs ok
if _, err := inspectField(imageReference, "Id"); err != nil {
t.Fatalf("failed to inspect image: %v", err)
}
// do the delete
if err := deleteImages(imageReference); err != nil {
t.Fatalf("unexpected error deleting image: %v", err)
}
// try to inspect again - it should error this time
if _, err := inspectField(imageReference, "Id"); err == nil {
t.Fatalf("unexpected nil err trying to inspect what should be a non-existent image")
} else if !strings.Contains(err.Error(), "No such image") {
t.Fatalf("expected 'No such image' output, got %v", err)
}
logDone("by_digest - remove image by digest")
}
func TestBuildByDigest(t *testing.T) {
defer setupRegistry(t)()
digest, err := setupImage()
if err != nil {
t.Fatalf("error setting up image: %v", err)
}
imageReference := fmt.Sprintf("%s@%s", repoName, digest)
// pull from the registry using the <name>@<digest> reference
c := exec.Command(dockerBinary, "pull", imageReference)
out, _, err := runCommandWithOutput(c)
if err != nil {
t.Fatalf("error pulling by digest: %s, %v", out, err)
}
// get the image id
imageID, err := inspectField(imageReference, "Id")
if err != nil {
t.Fatalf("error getting image id: %v", err)
}
// do the build
name := "buildbydigest"
defer deleteImages(name)
_, err = buildImage(name, fmt.Sprintf(
`FROM %s
CMD ["/bin/echo", "Hello World"]`, imageReference),
true)
if err != nil {
t.Fatal(err)
}
// get the build's image id
res, err := inspectField(name, "Config.Image")
if err != nil {
t.Fatal(err)
}
// make sure they match
if res != imageID {
t.Fatalf("Image %s, expected %s", res, imageID)
}
logDone("by_digest - build by digest")
}
func TestTagByDigest(t *testing.T) {
defer setupRegistry(t)()
digest, err := setupImage()
if err != nil {
t.Fatalf("error setting up image: %v", err)
}
imageReference := fmt.Sprintf("%s@%s", repoName, digest)
// pull from the registry using the <name>@<digest> reference
c := exec.Command(dockerBinary, "pull", imageReference)
out, _, err := runCommandWithOutput(c)
if err != nil {
t.Fatalf("error pulling by digest: %s, %v", out, err)
}
// tag it
tag := "tagbydigest"
c = exec.Command(dockerBinary, "tag", imageReference, tag)
if _, err := runCommand(c); err != nil {
t.Fatalf("unexpected error tagging: %v", err)
}
expectedID, err := inspectField(imageReference, "Id")
if err != nil {
t.Fatalf("error getting original image id: %v", err)
}
tagID, err := inspectField(tag, "Id")
if err != nil {
t.Fatalf("error getting tagged image id: %v", err)
}
if tagID != expectedID {
t.Fatalf("expected image id %q, got %q", expectedID, tagID)
}
logDone("by_digest - tag by digest")
}
func TestListImagesWithoutDigests(t *testing.T) {
defer setupRegistry(t)()
digest, err := setupImage()
if err != nil {
t.Fatalf("error setting up image: %v", err)
}
imageReference := fmt.Sprintf("%s@%s", repoName, digest)
// pull from the registry using the <name>@<digest> reference
c := exec.Command(dockerBinary, "pull", imageReference)
out, _, err := runCommandWithOutput(c)
if err != nil {
t.Fatalf("error pulling by digest: %s, %v", out, err)
}
c = exec.Command(dockerBinary, "images")
out, _, err = runCommandWithOutput(c)
if err != nil {
t.Fatalf("error listing images: %s, %v", out, err)
}
if strings.Contains(out, "DIGEST") {
t.Fatalf("list output should not have contained DIGEST header: %s", out)
}
logDone("by_digest - list images - digest header not displayed by default")
}
func TestListImagesWithDigests(t *testing.T) {
defer setupRegistry(t)()
defer deleteImages(repoName+":tag1", repoName+":tag2")
// setup image1
digest1, err := setupImageWithTag("tag1")
if err != nil {
t.Fatalf("error setting up image: %v", err)
}
imageReference1 := fmt.Sprintf("%s@%s", repoName, digest1)
defer deleteImages(imageReference1)
t.Logf("imageReference1 = %s", imageReference1)
// pull image1 by digest
c := exec.Command(dockerBinary, "pull", imageReference1)
out, _, err := runCommandWithOutput(c)
if err != nil {
t.Fatalf("error pulling by digest: %s, %v", out, err)
}
// list images
c = exec.Command(dockerBinary, "images", "--digests")
out, _, err = runCommandWithOutput(c)
if err != nil {
t.Fatalf("error listing images: %s, %v", out, err)
}
// make sure repo shown, tag=<none>, digest = $digest1
re1 := regexp.MustCompile(`\s*` + repoName + `\s*<none>\s*` + digest1 + `\s`)
if !re1.MatchString(out) {
t.Fatalf("expected %q: %s", re1.String(), out)
}
// setup image2
digest2, err := setupImageWithTag("tag2")
if err != nil {
t.Fatalf("error setting up image: %v", err)
}
imageReference2 := fmt.Sprintf("%s@%s", repoName, digest2)
defer deleteImages(imageReference2)
t.Logf("imageReference2 = %s", imageReference2)
// pull image1 by digest
c = exec.Command(dockerBinary, "pull", imageReference1)
out, _, err = runCommandWithOutput(c)
if err != nil {
t.Fatalf("error pulling by digest: %s, %v", out, err)
}
// pull image2 by digest
c = exec.Command(dockerBinary, "pull", imageReference2)
out, _, err = runCommandWithOutput(c)
if err != nil {
t.Fatalf("error pulling by digest: %s, %v", out, err)
}
// list images
c = exec.Command(dockerBinary, "images", "--digests")
out, _, err = runCommandWithOutput(c)
if err != nil {
t.Fatalf("error listing images: %s, %v", out, err)
}
// make sure repo shown, tag=<none>, digest = $digest1
if !re1.MatchString(out) {
t.Fatalf("expected %q: %s", re1.String(), out)
}
// make sure repo shown, tag=<none>, digest = $digest2
re2 := regexp.MustCompile(`\s*` + repoName + `\s*<none>\s*` + digest2 + `\s`)
if !re2.MatchString(out) {
t.Fatalf("expected %q: %s", re2.String(), out)
}
// pull tag1
c = exec.Command(dockerBinary, "pull", repoName+":tag1")
out, _, err = runCommandWithOutput(c)
if err != nil {
t.Fatalf("error pulling tag1: %s, %v", out, err)
}
// list images
c = exec.Command(dockerBinary, "images", "--digests")
out, _, err = runCommandWithOutput(c)
if err != nil {
t.Fatalf("error listing images: %s, %v", out, err)
}
// make sure image 1 has repo, tag, <none> AND repo, <none>, digest
reWithTag1 := regexp.MustCompile(`\s*` + repoName + `\s*tag1\s*<none>\s`)
reWithDigest1 := regexp.MustCompile(`\s*` + repoName + `\s*<none>\s*` + digest1 + `\s`)
if !reWithTag1.MatchString(out) {
t.Fatalf("expected %q: %s", reWithTag1.String(), out)
}
if !reWithDigest1.MatchString(out) {
t.Fatalf("expected %q: %s", reWithDigest1.String(), out)
}
// make sure image 2 has repo, <none>, digest
if !re2.MatchString(out) {
t.Fatalf("expected %q: %s", re2.String(), out)
}
// pull tag 2
c = exec.Command(dockerBinary, "pull", repoName+":tag2")
out, _, err = runCommandWithOutput(c)
if err != nil {
t.Fatalf("error pulling tag2: %s, %v", out, err)
}
// list images
c = exec.Command(dockerBinary, "images", "--digests")
out, _, err = runCommandWithOutput(c)
if err != nil {
t.Fatalf("error listing images: %s, %v", out, err)
}
// make sure image 1 has repo, tag, digest
if !reWithTag1.MatchString(out) {
t.Fatalf("expected %q: %s", re1.String(), out)
}
// make sure image 2 has repo, tag, digest
reWithTag2 := regexp.MustCompile(`\s*` + repoName + `\s*tag2\s*<none>\s`)
reWithDigest2 := regexp.MustCompile(`\s*` + repoName + `\s*<none>\s*` + digest2 + `\s`)
if !reWithTag2.MatchString(out) {
t.Fatalf("expected %q: %s", reWithTag2.String(), out)
}
if !reWithDigest2.MatchString(out) {
t.Fatalf("expected %q: %s", reWithDigest2.String(), out)
}
// list images
c = exec.Command(dockerBinary, "images", "--digests")
out, _, err = runCommandWithOutput(c)
if err != nil {
t.Fatalf("error listing images: %s, %v", out, err)
}
// make sure image 1 has repo, tag, digest
if !reWithTag1.MatchString(out) {
t.Fatalf("expected %q: %s", re1.String(), out)
}
// make sure image 2 has repo, tag, digest
if !reWithTag2.MatchString(out) {
t.Fatalf("expected %q: %s", re2.String(), out)
}
// make sure busybox has tag, but not digest
busyboxRe := regexp.MustCompile(`\s*busybox\s*latest\s*<none>\s`)
if !busyboxRe.MatchString(out) {
t.Fatalf("expected %q: %s", busyboxRe.String(), out)
}
logDone("by_digest - list images with digests")
}
func TestDeleteImageByIDOnlyPulledByDigest(t *testing.T) {
defer setupRegistry(t)()
pushDigest, err := setupImage()
if err != nil {
t.Fatalf("error setting up image: %v", err)
}
// pull from the registry using the <name>@<digest> reference
imageReference := fmt.Sprintf("%s@%s", repoName, pushDigest)
c := exec.Command(dockerBinary, "pull", imageReference)
out, _, err := runCommandWithOutput(c)
if err != nil {
t.Fatalf("error pulling by digest: %s, %v", out, err)
}
// just in case...
defer deleteImages(imageReference)
imageID, err := inspectField(imageReference, ".Id")
if err != nil {
t.Fatalf("error inspecting image id: %v", err)
}
c = exec.Command(dockerBinary, "rmi", imageID)
if _, err := runCommand(c); err != nil {
t.Fatalf("error deleting image by id: %v", err)
}
logDone("by_digest - delete image by id only pulled by digest")
}