Disable legacy (v1) registries by default

cmd/dockerd/daemon.go

@@ -406,8 +406,12 @@ func loadDaemonCliConfig(opts *daemonOptions) (*config.Config, error) {
 		return nil, err
 	}
 
+	if conf.V2Only == false {
+		logrus.Warnf(`The "disable-legacy-registry" option is deprecated and wil be removed in Docker v17.12. Interacting with legacy (v1) registries will no longer be supported in Docker v17.12"`)
+	}
+
 	if flags.Changed("graph") {
-		logrus.Warnf(`the "-g / --graph" flag is deprecated. Please use "--data-root" instead`)
+		logrus.Warnf(`The "-g / --graph" flag is deprecated. Please use "--data-root" instead`)
 	}
 
 	// Labels of the docker engine used to allow multiple values associated with the same key.

cmd/dockerd/daemon_unix_test.go

@@ -102,13 +102,13 @@ func TestLoadDaemonConfigWithTrueDefaultValuesLeaveDefaults(t *testing.T) {
 }
 
 func TestLoadDaemonConfigWithLegacyRegistryOptions(t *testing.T) {
-	content := `{"disable-legacy-registry": true}`
+	content := `{"disable-legacy-registry": false}`
 	tempFile := tempfile.NewTempFile(t, "config", content)
 	defer tempFile.Remove()
 
 	opts := defaultOptions(tempFile.Name())
 	loadedConfig, err := loadDaemonCliConfig(opts)
 	require.NoError(t, err)
 	require.NotNil(t, loadedConfig)
-	assert.True(t, loadedConfig.V2Only)
+	assert.False(t, loadedConfig.V2Only)
 }

contrib/completion/zsh/_docker

@@ -2620,7 +2620,7 @@ __docker_subcommand() {
                 "($help)--default-gateway-v6[Container default gateway IPv6 address]:IPv6 address: " \
                 "($help)--default-shm-size=[Default shm size for containers]:size:" \
                 "($help)*--default-ulimit=[Default ulimits for containers]:ulimit: " \
-                "($help)--disable-legacy-registry[Disable contacting legacy registries]" \
+                "($help)--disable-legacy-registry[Disable contacting legacy registries (default true)]" \
                 "($help)*--dns=[DNS server to use]:DNS: " \
                 "($help)*--dns-opt=[DNS options to use]:DNS option: " \
                 "($help)*--dns-search=[DNS search domains to use]:DNS search: " \

docs/deprecated.md

@@ -292,7 +292,7 @@ of the `--changes` flag that allows to pass `Dockerfile` commands.
 
 **Target For Removal In Release: v17.12**
 
-Version 1.9 adds a flag (`--disable-legacy-registry=false`) which prevents the
+Version 1.8.3 added a flag (`--disable-legacy-registry=false`) which prevents the
 docker daemon from `pull`, `push`, and `login` operations against v1
 registries.  Though enabled by default, this signals the intent to deprecate
 the v1 protocol.

docs/reference/commandline/dockerd.md

@@ -42,7 +42,7 @@ Options:
       --default-gateway-v6 ip                 Container default gateway IPv6 address
       --default-runtime string                Default OCI runtime for containers (default "runc")
       --default-ulimit ulimit                 Default ulimits for containers (default [])
-      --disable-legacy-registry               Disable contacting legacy registries
+      --disable-legacy-registry               Disable contacting legacy registries (default true)
       --dns list                              DNS server to use (default [])
       --dns-opt list                          DNS options to use (default [])
       --dns-search list                       DNS search domains to use (default [])
@@ -901,7 +901,18 @@ system's list of trusted CAs instead of enabling `--insecure-registry`.
 
 ##### Legacy Registries
 
-Enabling `--disable-legacy-registry` forces a docker daemon to only interact with registries which support the V2 protocol.  Specifically, the daemon will not attempt `push`, `pull` and `login` to v1 registries.  The exception to this is `search` which can still be performed on v1 registries.
+Operations against registries supporting only the legacy v1 protocol are
+disabled by default. Specifically, the daemon will not attempt `push`,
+`pull` and `login` to v1 registries. The exception to this is `search`
+which can still be performed on v1 registries.
+
+Add `"disable-legacy-registry":false` to the [daemon configuration
+file](#daemon-configuration-file), or set the
+`--disable-legacy-registry=false` flag, if you need to interact with
+registries that have not yet migrated to the v2 protocol.
+
+Interaction v1 registries will no longer be supported in Docker v17.12,
+and the `disable-legacy-registry` configuration option will be removed.
 
 #### Running a Docker daemon behind an HTTPS_PROXY
 

integration-cli/docker_cli_logout_test.go

@@ -13,6 +13,10 @@ import (
 )
 
 func (s *DockerRegistryAuthHtpasswdSuite) TestLogoutWithExternalAuth(c *check.C) {
+
+	// @TODO TestLogoutWithExternalAuth expects docker to fall back to a v1 registry, so has to be updated for v17.12, when v1 registries are no longer supported
+	s.d.StartWithBusybox(c, "--disable-legacy-registry=false")
+
 	osPath := os.Getenv("PATH")
 	defer os.Setenv("PATH", osPath)
 
@@ -28,31 +32,35 @@ func (s *DockerRegistryAuthHtpasswdSuite) TestLogoutWithExternalAuth(c *check.C)
 
 	tmp, err := ioutil.TempDir("", "integration-cli-")
 	c.Assert(err, checker.IsNil)
+	defer os.RemoveAll(tmp)
 
 	externalAuthConfig := `{ "credsStore": "shell-test" }`
 
 	configPath := filepath.Join(tmp, "config.json")
 	err = ioutil.WriteFile(configPath, []byte(externalAuthConfig), 0644)
 	c.Assert(err, checker.IsNil)
 
-	dockerCmd(c, "--config", tmp, "login", "-u", s.reg.Username(), "-p", s.reg.Password(), privateRegistryURL)
+	_, err = s.d.Cmd("--config", tmp, "login", "-u", s.reg.Username(), "-p", s.reg.Password(), privateRegistryURL)
+	c.Assert(err, checker.IsNil)
 
 	b, err := ioutil.ReadFile(configPath)
 	c.Assert(err, checker.IsNil)
 	c.Assert(string(b), checker.Not(checker.Contains), "\"auth\":")
 	c.Assert(string(b), checker.Contains, privateRegistryURL)
 
-	dockerCmd(c, "--config", tmp, "tag", "busybox", repoName)
-	dockerCmd(c, "--config", tmp, "push", repoName)
-
-	dockerCmd(c, "--config", tmp, "logout", privateRegistryURL)
+	_, err = s.d.Cmd("--config", tmp, "tag", "busybox", repoName)
+	c.Assert(err, checker.IsNil)
+	_, err = s.d.Cmd("--config", tmp, "push", repoName)
+	c.Assert(err, checker.IsNil)
+	_, err = s.d.Cmd("--config", tmp, "logout", privateRegistryURL)
+	c.Assert(err, checker.IsNil)
 
 	b, err = ioutil.ReadFile(configPath)
 	c.Assert(err, checker.IsNil)
 	c.Assert(string(b), checker.Not(checker.Contains), privateRegistryURL)
 
 	// check I cannot pull anymore
-	out, _, err := dockerCmdWithError("--config", tmp, "pull", repoName)
+	out, err := s.d.Cmd("--config", tmp, "pull", repoName)
 	c.Assert(err, check.NotNil, check.Commentf(out))
 	c.Assert(out, checker.Contains, "Error: image dockercli/busybox:authtest not found")
 }

integration-cli/docker_cli_pull_test.go

@@ -258,10 +258,13 @@ func (s *DockerHubPullSuite) TestPullClientDisconnect(c *check.C) {
 }
 
 func (s *DockerRegistryAuthHtpasswdSuite) TestPullNoCredentialsNotFound(c *check.C) {
+	// @TODO TestPullNoCredentialsNotFound expects docker to fall back to a v1 registry, so has to be updated for v17.12, when v1 registries are no longer supported
+	s.d.StartWithBusybox(c, "--disable-legacy-registry=false")
+
 	// we don't care about the actual image, we just want to see image not found
 	// because that means v2 call returned 401 and we fell back to v1 which usually
 	// gives a 404 (in this case the test registry doesn't handle v1 at all)
-	out, _, err := dockerCmdWithError("pull", privateRegistryURL+"/busybox")
+	out, err := s.d.Cmd("pull", privateRegistryURL+"/busybox")
 	c.Assert(err, check.NotNil, check.Commentf(out))
 	c.Assert(out, checker.Contains, "Error: image busybox:latest not found")
 }

integration-cli/docker_cli_registry_user_agent_test.go

@@ -98,8 +98,7 @@ func (s *DockerRegistrySuite) TestUserAgentPassThrough(c *check.C) {
 		"--insecure-registry", buildReg.URL(),
 		"--insecure-registry", pullReg.URL(),
 		"--insecure-registry", pushReg.URL(),
-		"--insecure-registry", loginReg.URL(),
-		"--disable-legacy-registry=true")
+		"--insecure-registry", loginReg.URL())
 
 	dockerfileName, cleanup1, err := makefile(fmt.Sprintf("FROM %s", buildRepoName))
 	c.Assert(err, check.IsNil, check.Commentf("Unable to create test dockerfile"))

integration-cli/docker_cli_v2_only_test.go

@@ -34,7 +34,7 @@ func makefile(contents string) (string, func(), error) {
 
 }
 
-// TestV2Only ensures that a daemon in v2-only mode does not
+// TestV2Only ensures that a daemon by default does not
 // attempt to contact any v1 registry endpoints.
 func (s *DockerRegistrySuite) TestV2Only(c *check.C) {
 	reg, err := registry.NewMock(c)
@@ -51,7 +51,7 @@ func (s *DockerRegistrySuite) TestV2Only(c *check.C) {
 
 	repoName := fmt.Sprintf("%s/busybox", reg.URL())
 
-	s.d.Start(c, "--insecure-registry", reg.URL(), "--disable-legacy-registry=true")
+	s.d.Start(c, "--insecure-registry", reg.URL())
 
 	dockerfileName, cleanup, err := makefile(fmt.Sprintf("FROM %s/busybox", reg.URL()))
 	c.Assert(err, check.IsNil, check.Commentf("Unable to create test dockerfile"))
@@ -66,7 +66,7 @@ func (s *DockerRegistrySuite) TestV2Only(c *check.C) {
 	s.d.Cmd("pull", repoName)
 }
 
-// TestV1 starts a daemon in 'normal' mode
+// TestV1 starts a daemon with legacy registries enabled
 // and ensure v1 endpoints are hit for the following operations:
 // login, push, pull, build & run
 func (s *DockerRegistrySuite) TestV1(c *check.C) {

man/dockerd.8.md

@@ -192,7 +192,7 @@ $ sudo dockerd --add-runtime runc=runc --add-runtime custom=/usr/local/bin/my-ru
   Default ulimits for containers.
 
 **--disable-legacy-registry**=*true*|*false*
-  Disable contacting legacy registries
+  Disable contacting legacy registries. Default is `true`.
 
 **--dns**=""
   Force Docker to use specific DNS servers

registry/config_unix.go

@@ -21,5 +21,5 @@ func cleanPath(s string) string {
 
 // installCliPlatformFlags handles any platform specific flags for the service.
 func (options *ServiceOptions) installCliPlatformFlags(flags *pflag.FlagSet) {
-	flags.BoolVar(&options.V2Only, "disable-legacy-registry", false, "Disable contacting legacy registries")
+	flags.BoolVar(&options.V2Only, "disable-legacy-registry", true, "Disable contacting legacy registries")
 }