registry: don't call "/info" API endpoint to get default registry

cli/command/registry.go

@@ -12,7 +12,6 @@ import (
 	"strings"
 
 	configtypes "github.com/docker/cli/cli/config/types"
-	"github.com/docker/cli/cli/debug"
 	"github.com/docker/cli/cli/streams"
 	"github.com/docker/distribution/reference"
 	"github.com/docker/docker/api/types"
@@ -22,28 +21,10 @@ import (
 	"github.com/pkg/errors"
 )
 
-// ElectAuthServer returns the default registry to use (by asking the daemon)
-func ElectAuthServer(ctx context.Context, cli Cli) string {
-	// The daemon `/info` endpoint informs us of the default registry being
-	// used. This is essential in cross-platforms environment, where for
-	// example a Linux client might be interacting with a Windows daemon, hence
-	// the default registry URL might be Windows specific.
-	info, err := cli.Client().Info(ctx)
-	if err != nil {
-		// Daemon is not responding so use system default.
-		if debug.IsEnabled() {
-			// Only report the warning if we're in debug mode to prevent nagging during engine initialization workflows
-			fmt.Fprintf(cli.Err(), "Warning: failed to get default registry endpoint from daemon (%v). Using system default: %s\n", err, registry.IndexServer)
-		}
-		return registry.IndexServer
-	}
-	if info.IndexServerAddress == "" {
-		if debug.IsEnabled() {
-			fmt.Fprintf(cli.Err(), "Warning: Empty registry endpoint from daemon. Using system default: %s\n", registry.IndexServer)
-		}
-		return registry.IndexServer
-	}
-	return info.IndexServerAddress
+// ElectAuthServer returns the default registry to use
+// Deprecated: use registry.IndexServer instead
+func ElectAuthServer(_ context.Context, _ Cli) string {
+	return registry.IndexServer
 }
 
 // EncodeAuthToBase64 serializes the auth configuration as JSON base64 payload
@@ -61,7 +42,7 @@ func RegistryAuthenticationPrivilegedFunc(cli Cli, index *registrytypes.IndexInf
 	return func() (string, error) {
 		fmt.Fprintf(cli.Out(), "\nPlease login prior to %s:\n", cmdName)
 		indexServer := registry.GetAuthConfigKey(index)
-		isDefaultRegistry := indexServer == ElectAuthServer(context.Background(), cli)
+		isDefaultRegistry := indexServer == registry.IndexServer
 		authConfig, err := GetDefaultAuthConfig(cli, true, indexServer, isDefaultRegistry)
 		if err != nil {
 			fmt.Fprintf(cli.Err(), "Unable to retrieve stored credentials for %s, error: %s.\n", indexServer, err)
@@ -77,10 +58,10 @@ func RegistryAuthenticationPrivilegedFunc(cli Cli, index *registrytypes.IndexInf
 // ResolveAuthConfig is like registry.ResolveAuthConfig, but if using the
 // default index, it uses the default index name for the daemon's platform,
 // not the client's platform.
-func ResolveAuthConfig(ctx context.Context, cli Cli, index *registrytypes.IndexInfo) types.AuthConfig {
+func ResolveAuthConfig(_ context.Context, cli Cli, index *registrytypes.IndexInfo) types.AuthConfig {
 	configKey := index.Name
 	if index.Official {
-		configKey = ElectAuthServer(ctx, cli)
+		configKey = registry.IndexServer
 	}
 
 	a, _ := cli.ConfigFile().GetAuthConfig(configKey)

cli/command/registry/login.go

@@ -103,16 +103,15 @@ func runLogin(dockerCli command.Cli, opts loginOptions) error { //nolint: gocycl
 	}
 	var (
 		serverAddress string
-		authServer    = command.ElectAuthServer(ctx, dockerCli)
+		response      registrytypes.AuthenticateOKBody
 	)
 	if opts.serverAddress != "" && opts.serverAddress != registry.DefaultNamespace {
 		serverAddress = opts.serverAddress
 	} else {
-		serverAddress = authServer
+		serverAddress = registry.IndexServer
 	}
 
-	var response registrytypes.AuthenticateOKBody
-	isDefaultRegistry := serverAddress == authServer
+	isDefaultRegistry := serverAddress == registry.IndexServer
 	authConfig, err := command.GetDefaultAuthConfig(dockerCli, opts.user == "" && opts.password == "", serverAddress, isDefaultRegistry)
 	if err == nil && authConfig.Username != "" && authConfig.Password != "" {
 		response, err = loginWithCredStoreCreds(ctx, dockerCli, &authConfig)

cli/command/registry/logout.go

@@ -1,7 +1,6 @@
 package registry
 
 import (
-	"context"
 	"fmt"
 
 	"github.com/docker/cli/cli"
@@ -30,11 +29,10 @@ func NewLogoutCommand(dockerCli command.Cli) *cobra.Command {
 }
 
 func runLogout(dockerCli command.Cli, serverAddress string) error {
-	ctx := context.Background()
 	var isDefaultRegistry bool
 
 	if serverAddress == "" {
-		serverAddress = command.ElectAuthServer(ctx, dockerCli)
+		serverAddress = registry.IndexServer
 		isDefaultRegistry = true
 	}
 

cli/command/registry_test.go

@@ -6,15 +6,13 @@ import (
 	"fmt"
 	"testing"
 
-	"github.com/pkg/errors"
 	"gotest.tools/v3/assert"
 	is "gotest.tools/v3/assert/cmp"
 
 	// Prevents a circular import with "github.com/docker/cli/internal/test"
 
 	. "github.com/docker/cli/cli/command"
 	configtypes "github.com/docker/cli/cli/config/types"
-	"github.com/docker/cli/cli/debug"
 	"github.com/docker/cli/internal/test"
 	"github.com/docker/docker/api/types"
 	"github.com/docker/docker/client"
@@ -45,56 +43,6 @@ func (cli *fakeClient) Info(_ context.Context) (types.Info, error) {
 	return types.Info{}, nil
 }
 
-func TestElectAuthServer(t *testing.T) {
-	testCases := []struct {
-		expectedAuthServer string
-		expectedWarning    string
-		infoFunc           func() (types.Info, error)
-	}{
-		{
-			expectedAuthServer: "https://index.docker.io/v1/",
-			expectedWarning:    "",
-			infoFunc: func() (types.Info, error) {
-				return types.Info{IndexServerAddress: "https://index.docker.io/v1/"}, nil
-			},
-		},
-		{
-			expectedAuthServer: "https://index.docker.io/v1/",
-			expectedWarning:    "Empty registry endpoint from daemon",
-			infoFunc: func() (types.Info, error) {
-				return types.Info{IndexServerAddress: ""}, nil
-			},
-		},
-		{
-			expectedAuthServer: "https://foo.example.com",
-			expectedWarning:    "",
-			infoFunc: func() (types.Info, error) {
-				return types.Info{IndexServerAddress: "https://foo.example.com"}, nil
-			},
-		},
-		{
-			expectedAuthServer: "https://index.docker.io/v1/",
-			expectedWarning:    "failed to get default registry endpoint from daemon",
-			infoFunc: func() (types.Info, error) {
-				return types.Info{}, errors.Errorf("error getting info")
-			},
-		},
-	}
-	// Enable debug to see warnings we're checking for
-	debug.Enable()
-	for _, tc := range testCases {
-		cli := test.NewFakeCli(&fakeClient{infoFunc: tc.infoFunc})
-		server := ElectAuthServer(context.Background(), cli)
-		assert.Check(t, is.Equal(tc.expectedAuthServer, server))
-		actual := cli.ErrBuffer().String()
-		if tc.expectedWarning == "" {
-			assert.Check(t, is.Len(actual, 0))
-		} else {
-			assert.Check(t, is.Contains(actual, tc.expectedWarning))
-		}
-	}
-}
-
 func TestGetDefaultAuthConfig(t *testing.T) {
 	testCases := []struct {
 		checkCredStore     bool