Merge pull request #29 from rumpl/feat-serve

Feat serve

Dockerfile

@@ -34,7 +34,9 @@ RUN --mount=type=cache,target=/root/.cache/go-build \
     make xbins
 
 FROM scratch AS protos
-COPY --from=make-protos /go/src/github.com/docker/api/backend/v1/*.pb.go .
+COPY --from=make-protos /go/src/github.com/docker/api/backend/v1/*.pb.go ./backend/v1/
+COPY --from=make-protos /go/src/github.com/docker/api/compose/v1/*.pb.go ./compose/v1/
+COPY --from=make-protos /go/src/github.com/docker/api/cli/v1/*.pb.go ./cli/v1/
 
 FROM scratch AS bins
 COPY --from=make-bins /go/src/github.com/docker/api/bin/* .

Makefile

@@ -49,7 +49,7 @@ xcli: cli
 
 dprotos:
 	docker build . \
-	--output type=local,dest=./backend/v1 \
+	--output type=local,dest=. \
 	--target protos
 
 dbins: dprotos

azure/backend.go

@@ -30,15 +30,15 @@ func getter() interface{} {
 
 func New(ctx context.Context) (containers.ContainerService, error) {
 	cc := apicontext.CurrentContext(ctx)
-	s, err := store.New()
+	contextStore, err := store.New()
 	if err != nil {
 		return nil, err
 	}
-	m, err := s.Get(cc, getter)
+	metadata, err := contextStore.Get(cc, getter)
 	if err != nil {
 		return nil, errors.Wrap(err, "wrong context type")
 	}
-	tc, _ := m.Metadata.Data.(store.AciContext)
+	tc, _ := metadata.Metadata.Data.(store.AciContext)
 
 	auth, _ := auth.NewAuthorizerFromCLI()
 	containerGroupsClient := containerinstance.NewContainerGroupsClient(tc.SubscriptionID)

backend/backend.go

@@ -3,6 +3,7 @@ package backend
 import (
 	"context"
 	"errors"
+	"fmt"
 )
 
 var (
@@ -50,5 +51,5 @@ func Get(ctx context.Context, backendType string) (interface{}, error) {
 		}
 	}
 
-	return nil, errors.New("not found")
+	return nil, fmt.Errorf("backend not found for context %q", backendType)
 }

cli/cmd/ps.go

@@ -21,7 +21,7 @@ var PsCommand = cobra.Command{
 			return errors.Wrap(err, "cannot connect to backend")
 		}
 
-		containers, err := c.ContainerService(ctx).List(ctx)
+		containers, err := c.ContainerService().List(ctx)
 		if err != nil {
 			return errors.Wrap(err, "fetch containers")
 		}

cli/cmd/serve.go

@@ -0,0 +1,88 @@
+package cmd
+
+import (
+	"context"
+	"net"
+
+	cliv1 "github.com/docker/api/cli/v1"
+	containersv1 "github.com/docker/api/containers/v1"
+	"github.com/docker/api/context/store"
+	"github.com/docker/api/server"
+	"github.com/docker/api/server/proxy"
+	"github.com/pkg/errors"
+	"github.com/sirupsen/logrus"
+
+	"github.com/spf13/cobra"
+)
+
+type serveOpts struct {
+	address string
+}
+
+func ServeCommand() *cobra.Command {
+	var opts serveOpts
+	cmd := &cobra.Command{
+		Use:   "serve",
+		Short: "Start an api server",
+		RunE: func(cmd *cobra.Command, args []string) error {
+			return runServe(cmd.Context(), opts)
+		},
+	}
+
+	cmd.Flags().StringVar(&opts.address, "address", "", "The address to listen to")
+
+	return cmd
+}
+
+func runServe(ctx context.Context, opts serveOpts) error {
+	s := server.New()
+
+	listener, err := net.Listen("unix", opts.address)
+	if err != nil {
+		return errors.Wrap(err, "listen unix socket")
+	}
+	defer listener.Close()
+
+	p := proxy.NewContainerApi()
+
+	containersv1.RegisterContainersServer(s, p)
+	cliv1.RegisterCliServer(s, &cliServer{
+		ctx,
+	})
+
+	go func() {
+		<-ctx.Done()
+		logrus.Info("stopping server")
+		s.Stop()
+	}()
+
+	logrus.WithField("address", opts.address).Info("serving daemon API")
+
+	// start the GRPC server to serve on the listener
+	return s.Serve(listener)
+}
+
+type cliServer struct {
+	ctx context.Context
+}
+
+func (cs *cliServer) Contexts(ctx context.Context, request *cliv1.ContextsRequest) (*cliv1.ContextsResponse, error) {
+	s, err := store.New()
+	if err != nil {
+		logrus.Error(err)
+		return &cliv1.ContextsResponse{}, err
+	}
+	contexts, err := s.List()
+	if err != nil {
+		logrus.Error(err)
+		return &cliv1.ContextsResponse{}, err
+	}
+	result := &cliv1.ContextsResponse{}
+	for _, c := range contexts {
+		result.Contexts = append(result.Contexts, &cliv1.Context{
+			Name:        c.Name,
+			ContextType: c.Metadata.Type,
+		})
+	}
+	return result, nil
+}

cli/main.go

@@ -65,14 +65,14 @@ func init() {
 	}
 }
 
-func isContextCommand(cmd *cobra.Command) bool {
+func isOwnCommand(cmd *cobra.Command) bool {
 	if cmd == nil {
 		return false
 	}
-	if cmd.Name() == "context" {
+	if cmd.Name() == "context" || cmd.Name() == "serve" {
 		return true
 	}
-	return isContextCommand(cmd.Parent())
+	return isOwnCommand(cmd.Parent())
 }
 
 func main() {
@@ -82,7 +82,7 @@ func main() {
 		Long:          "docker for the 2020s",
 		SilenceErrors: true,
 		PersistentPreRunE: func(cmd *cobra.Command, args []string) error {
-			if !isContextCommand(cmd) {
+			if !isOwnCommand(cmd) {
 				execMoby(cmd.Context())
 			}
 			return nil
@@ -94,7 +94,7 @@ func main() {
 
 	helpFunc := root.HelpFunc()
 	root.SetHelpFunc(func(cmd *cobra.Command, args []string) {
-		if !isContextCommand(cmd) {
+		if !isOwnCommand(cmd) {
 			execMoby(cmd.Context())
 		}
 		helpFunc(cmd, args)
@@ -112,13 +112,26 @@ func main() {
 	root.AddCommand(
 		cmd.ContextCommand(),
 		&cmd.PsCommand,
+		cmd.ServeCommand(),
 		&cmd.ExampleCommand,
 	)
 
 	ctx, cancel := util.NewSigContext()
 	defer cancel()
 
-	ctx, err := apicontext.WithCurrentContext(ctx, opts.Config, opts.Context)
+	config, err := apicontext.LoadConfigFile(opts.Config, "config.json")
+	if err != nil {
+		logrus.Fatal("unable ot find configuration")
+	}
+	currentContext := opts.Context
+	if currentContext == "" {
+		currentContext = config.CurrentContext
+	}
+	if currentContext == "" {
+		currentContext = "default"
+	}
+
+	ctx = apicontext.WithCurrentContext(ctx, currentContext)
 	if err != nil {
 		logrus.Fatal(err)
 	}

cli/v1/cli.pb.go

@@ -0,0 +1,371 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.21.0-devel
+// 	protoc        v3.6.1
+// source: cli/v1/cli.proto
+
+package v1
+
+import (
+	context "context"
+	proto "github.com/golang/protobuf/proto"
+	grpc "google.golang.org/grpc"
+	codes "google.golang.org/grpc/codes"
+	status "google.golang.org/grpc/status"
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+// This is a compile-time assertion that a sufficiently up-to-date version
+// of the legacy proto package is being used.
+const _ = proto.ProtoPackageIsVersion4
+
+type Context struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Name        string `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
+	ContextType string `protobuf:"bytes,2,opt,name=contextType,proto3" json:"contextType,omitempty"`
+}
+
+func (x *Context) Reset() {
+	*x = Context{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_cli_v1_cli_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *Context) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Context) ProtoMessage() {}
+
+func (x *Context) ProtoReflect() protoreflect.Message {
+	mi := &file_cli_v1_cli_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Context.ProtoReflect.Descriptor instead.
+func (*Context) Descriptor() ([]byte, []int) {
+	return file_cli_v1_cli_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *Context) GetName() string {
+	if x != nil {
+		return x.Name
+	}
+	return ""
+}
+
+func (x *Context) GetContextType() string {
+	if x != nil {
+		return x.ContextType
+	}
+	return ""
+}
+
+type ContextsRequest struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+}
+
+func (x *ContextsRequest) Reset() {
+	*x = ContextsRequest{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_cli_v1_cli_proto_msgTypes[1]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *ContextsRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ContextsRequest) ProtoMessage() {}
+
+func (x *ContextsRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_cli_v1_cli_proto_msgTypes[1]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use ContextsRequest.ProtoReflect.Descriptor instead.
+func (*ContextsRequest) Descriptor() ([]byte, []int) {
+	return file_cli_v1_cli_proto_rawDescGZIP(), []int{1}
+}
+
+type ContextsResponse struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Contexts []*Context `protobuf:"bytes,1,rep,name=contexts,proto3" json:"contexts,omitempty"`
+}
+
+func (x *ContextsResponse) Reset() {
+	*x = ContextsResponse{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_cli_v1_cli_proto_msgTypes[2]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *ContextsResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ContextsResponse) ProtoMessage() {}
+
+func (x *ContextsResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_cli_v1_cli_proto_msgTypes[2]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use ContextsResponse.ProtoReflect.Descriptor instead.
+func (*ContextsResponse) Descriptor() ([]byte, []int) {
+	return file_cli_v1_cli_proto_rawDescGZIP(), []int{2}
+}
+
+func (x *ContextsResponse) GetContexts() []*Context {
+	if x != nil {
+		return x.Contexts
+	}
+	return nil
+}
+
+var File_cli_v1_cli_proto protoreflect.FileDescriptor
+
+var file_cli_v1_cli_proto_rawDesc = []byte{
+	0x0a, 0x10, 0x63, 0x6c, 0x69, 0x2f, 0x76, 0x31, 0x2f, 0x63, 0x6c, 0x69, 0x2e, 0x70, 0x72, 0x6f,
+	0x74, 0x6f, 0x12, 0x15, 0x63, 0x6f, 0x6d, 0x2e, 0x64, 0x6f, 0x63, 0x6b, 0x65, 0x72, 0x2e, 0x61,
+	0x70, 0x69, 0x2e, 0x63, 0x6c, 0x69, 0x2e, 0x76, 0x31, 0x22, 0x3f, 0x0a, 0x07, 0x43, 0x6f, 0x6e,
+	0x74, 0x65, 0x78, 0x74, 0x12, 0x12, 0x0a, 0x04, 0x6e, 0x61, 0x6d, 0x65, 0x18, 0x01, 0x20, 0x01,
+	0x28, 0x09, 0x52, 0x04, 0x6e, 0x61, 0x6d, 0x65, 0x12, 0x20, 0x0a, 0x0b, 0x63, 0x6f, 0x6e, 0x74,
+	0x65, 0x78, 0x74, 0x54, 0x79, 0x70, 0x65, 0x18, 0x02, 0x20, 0x01, 0x28, 0x09, 0x52, 0x0b, 0x63,
+	0x6f, 0x6e, 0x74, 0x65, 0x78, 0x74, 0x54, 0x79, 0x70, 0x65, 0x22, 0x11, 0x0a, 0x0f, 0x43, 0x6f,
+	0x6e, 0x74, 0x65, 0x78, 0x74, 0x73, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x22, 0x4e, 0x0a,
+	0x10, 0x43, 0x6f, 0x6e, 0x74, 0x65, 0x78, 0x74, 0x73, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73,
+	0x65, 0x12, 0x3a, 0x0a, 0x08, 0x63, 0x6f, 0x6e, 0x74, 0x65, 0x78, 0x74, 0x73, 0x18, 0x01, 0x20,
+	0x03, 0x28, 0x0b, 0x32, 0x1e, 0x2e, 0x63, 0x6f, 0x6d, 0x2e, 0x64, 0x6f, 0x63, 0x6b, 0x65, 0x72,
+	0x2e, 0x61, 0x70, 0x69, 0x2e, 0x63, 0x6c, 0x69, 0x2e, 0x76, 0x31, 0x2e, 0x43, 0x6f, 0x6e, 0x74,
+	0x65, 0x78, 0x74, 0x52, 0x08, 0x63, 0x6f, 0x6e, 0x74, 0x65, 0x78, 0x74, 0x73, 0x32, 0x62, 0x0a,
+	0x03, 0x43, 0x6c, 0x69, 0x12, 0x5b, 0x0a, 0x08, 0x43, 0x6f, 0x6e, 0x74, 0x65, 0x78, 0x74, 0x73,
+	0x12, 0x26, 0x2e, 0x63, 0x6f, 0x6d, 0x2e, 0x64, 0x6f, 0x63, 0x6b, 0x65, 0x72, 0x2e, 0x61, 0x70,
+	0x69, 0x2e, 0x63, 0x6c, 0x69, 0x2e, 0x76, 0x31, 0x2e, 0x43, 0x6f, 0x6e, 0x74, 0x65, 0x78, 0x74,
+	0x73, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x1a, 0x27, 0x2e, 0x63, 0x6f, 0x6d, 0x2e, 0x64,
+	0x6f, 0x63, 0x6b, 0x65, 0x72, 0x2e, 0x61, 0x70, 0x69, 0x2e, 0x63, 0x6c, 0x69, 0x2e, 0x76, 0x31,
+	0x2e, 0x43, 0x6f, 0x6e, 0x74, 0x65, 0x78, 0x74, 0x73, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73,
+	0x65, 0x42, 0x21, 0x5a, 0x1f, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f,
+	0x64, 0x6f, 0x63, 0x6b, 0x65, 0x72, 0x2f, 0x61, 0x70, 0x69, 0x2f, 0x63, 0x6c, 0x69, 0x2f, 0x76,
+	0x31, 0x3b, 0x76, 0x31, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+}
+
+var (
+	file_cli_v1_cli_proto_rawDescOnce sync.Once
+	file_cli_v1_cli_proto_rawDescData = file_cli_v1_cli_proto_rawDesc
+)
+
+func file_cli_v1_cli_proto_rawDescGZIP() []byte {
+	file_cli_v1_cli_proto_rawDescOnce.Do(func() {
+		file_cli_v1_cli_proto_rawDescData = protoimpl.X.CompressGZIP(file_cli_v1_cli_proto_rawDescData)
+	})
+	return file_cli_v1_cli_proto_rawDescData
+}
+
+var file_cli_v1_cli_proto_msgTypes = make([]protoimpl.MessageInfo, 3)
+var file_cli_v1_cli_proto_goTypes = []interface{}{
+	(*Context)(nil),          // 0: com.docker.api.cli.v1.Context
+	(*ContextsRequest)(nil),  // 1: com.docker.api.cli.v1.ContextsRequest
+	(*ContextsResponse)(nil), // 2: com.docker.api.cli.v1.ContextsResponse
+}
+var file_cli_v1_cli_proto_depIdxs = []int32{
+	0, // 0: com.docker.api.cli.v1.ContextsResponse.contexts:type_name -> com.docker.api.cli.v1.Context
+	1, // 1: com.docker.api.cli.v1.Cli.Contexts:input_type -> com.docker.api.cli.v1.ContextsRequest
+	2, // 2: com.docker.api.cli.v1.Cli.Contexts:output_type -> com.docker.api.cli.v1.ContextsResponse
+	2, // [2:3] is the sub-list for method output_type
+	1, // [1:2] is the sub-list for method input_type
+	1, // [1:1] is the sub-list for extension type_name
+	1, // [1:1] is the sub-list for extension extendee
+	0, // [0:1] is the sub-list for field type_name
+}
+
+func init() { file_cli_v1_cli_proto_init() }
+func file_cli_v1_cli_proto_init() {
+	if File_cli_v1_cli_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_cli_v1_cli_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*Context); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_cli_v1_cli_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*ContextsRequest); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_cli_v1_cli_proto_msgTypes[2].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*ContextsResponse); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_cli_v1_cli_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   3,
+			NumExtensions: 0,
+			NumServices:   1,
+		},
+		GoTypes:           file_cli_v1_cli_proto_goTypes,
+		DependencyIndexes: file_cli_v1_cli_proto_depIdxs,
+		MessageInfos:      file_cli_v1_cli_proto_msgTypes,
+	}.Build()
+	File_cli_v1_cli_proto = out.File
+	file_cli_v1_cli_proto_rawDesc = nil
+	file_cli_v1_cli_proto_goTypes = nil
+	file_cli_v1_cli_proto_depIdxs = nil
+}
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ context.Context
+var _ grpc.ClientConnInterface
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+const _ = grpc.SupportPackageIsVersion6
+
+// CliClient is the client API for Cli service.
+//
+// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://godoc.org/google.golang.org/grpc#ClientConn.NewStream.
+type CliClient interface {
+	// Returns the list of existing contexts
+	Contexts(ctx context.Context, in *ContextsRequest, opts ...grpc.CallOption) (*ContextsResponse, error)
+}
+
+type cliClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewCliClient(cc grpc.ClientConnInterface) CliClient {
+	return &cliClient{cc}
+}
+
+func (c *cliClient) Contexts(ctx context.Context, in *ContextsRequest, opts ...grpc.CallOption) (*ContextsResponse, error) {
+	out := new(ContextsResponse)
+	err := c.cc.Invoke(ctx, "/com.docker.api.cli.v1.Cli/Contexts", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// CliServer is the server API for Cli service.
+type CliServer interface {
+	// Returns the list of existing contexts
+	Contexts(context.Context, *ContextsRequest) (*ContextsResponse, error)
+}
+
+// UnimplementedCliServer can be embedded to have forward compatible implementations.
+type UnimplementedCliServer struct {
+}
+
+func (*UnimplementedCliServer) Contexts(context.Context, *ContextsRequest) (*ContextsResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method Contexts not implemented")
+}
+
+func RegisterCliServer(s *grpc.Server, srv CliServer) {
+	s.RegisterService(&_Cli_serviceDesc, srv)
+}
+
+func _Cli_Contexts_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(ContextsRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(CliServer).Contexts(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/com.docker.api.cli.v1.Cli/Contexts",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(CliServer).Contexts(ctx, req.(*ContextsRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+var _Cli_serviceDesc = grpc.ServiceDesc{
+	ServiceName: "com.docker.api.cli.v1.Cli",
+	HandlerType: (*CliServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "Contexts",
+			Handler:    _Cli_Contexts_Handler,
+		},
+	},
+	Streams:  []grpc.StreamDesc{},
+	Metadata: "cli/v1/cli.proto",
+}

cli/v1/cli.proto

@@ -0,0 +1,24 @@
+syntax = "proto3";
+
+package com.docker.api.cli.v1;
+
+
+option go_package = "github.com/docker/api/cli/v1;v1";
+
+service Cli {
+    // Returns the list of existing contexts
+    rpc Contexts(ContextsRequest) returns (ContextsResponse);
+}
+
+message Context {
+    string name = 1;
+    string contextType = 2;
+}
+
+message ContextsRequest {
+
+}
+
+message ContextsResponse {
+    repeated Context contexts = 1;
+}

client/client.go

@@ -69,6 +69,6 @@ type Client struct {
 	cc          containers.ContainerService
 }
 
-func (c *Client) ContainerService(ctx context.Context) containers.ContainerService {
+func (c *Client) ContainerService() containers.ContainerService {
 	return c.cc
 }

compose/v1/compose.pb.go

@@ -1,3 +1,29 @@
+//
+//Copyright (c) 2020 Docker Inc.
+//
+//Permission is hereby granted, free of charge, to any person
+//obtaining a copy of this software and associated documentation
+//files (the "Software"), to deal in the Software without
+//restriction, including without limitation the rights to use, copy,
+//modify, merge, publish, distribute, sublicense, and/or sell copies
+//of the Software, and to permit persons to whom the Software is
+//furnished to do so, subject to the following conditions:
+//
+//The above copyright notice and this permission notice shall be
+//included in all copies or substantial portions of the Software.
+//
+//THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+//EXPRESS OR IMPLIED,
+//INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+//IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+//HOLDERS BE LIABLE FOR ANY CLAIM,
+//DAMAGES OR OTHER LIABILITY,
+//WHETHER IN AN ACTION OF CONTRACT,
+//TORT OR OTHERWISE,
+//ARISING FROM, OUT OF OR IN CONNECTION WITH
+//THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.21.0-devel

context/context.go

@@ -3,29 +3,15 @@ package context
 import (
 	gocontext "context"
 
-	"github.com/sirupsen/logrus"
 	"golang.org/x/net/context"
 )
 
+const KEY = "context_key"
+
 type currentContextKey struct{}
 
-func WithCurrentContext(ctx gocontext.Context, configName string, contextName string) (context.Context, error) {
-	config, err := LoadConfigFile(configName, "config.json")
-	if err != nil {
-		return ctx, err
-	}
-
-	currentContext := contextName
-	if currentContext == "" {
-		currentContext = config.CurrentContext
-	}
-	if currentContext == "" {
-		currentContext = "default"
-	}
-
-	logrus.Debugf("Current context %q", currentContext)
-
-	return context.WithValue(ctx, currentContextKey{}, currentContext), nil
+func WithCurrentContext(ctx gocontext.Context, contextName string) context.Context {
+	return context.WithValue(ctx, currentContextKey{}, contextName)
 }
 
 // CurrentContext returns the current context name

context/store/store.go

@@ -112,7 +112,14 @@ func New(opts ...StoreOpt) (Store, error) {
 // Get returns the context with the given name
 func (s *store) Get(name string, getter func() interface{}) (*Metadata, error) {
 	meta := filepath.Join(s.root, contextsDir, metadataDir, contextdirOf(name), metaFile)
-	return read(meta, getter)
+	m, err := read(meta, getter)
+	if os.IsNotExist(err) {
+		return nil, fmt.Errorf("unknown context %q", name)
+	} else if err != nil {
+		return nil, err
+	}
+
+	return m, nil
 }
 
 func read(meta string, getter func() interface{}) (*Metadata, error) {

server/proxy/proxy.go

@@ -0,0 +1,75 @@
+package proxy
+
+import (
+	"context"
+
+	"github.com/docker/api/client"
+	v1 "github.com/docker/api/containers/v1"
+	"github.com/golang/protobuf/ptypes/empty"
+)
+
+type clientKey struct{}
+
+func WithClient(ctx context.Context, c *client.Client) (context.Context, error) {
+	return context.WithValue(ctx, clientKey{}, c), nil
+}
+
+func Client(ctx context.Context) *client.Client {
+	c, _ := ctx.Value(clientKey{}).(*client.Client)
+	return c
+}
+
+func NewContainerApi() v1.ContainersServer {
+	return &proxyContainerApi{}
+}
+
+type proxyContainerApi struct{}
+
+func (p *proxyContainerApi) List(ctx context.Context, _ *v1.ListRequest) (*v1.ListResponse, error) {
+	client := Client(ctx)
+
+	c, err := client.ContainerService().List(ctx)
+	if err != nil {
+		return &v1.ListResponse{}, nil
+	}
+
+	response := &v1.ListResponse{
+		Containers: []*v1.Container{},
+	}
+	for _, container := range c {
+		response.Containers = append(response.Containers, &v1.Container{
+			Id:    container.ID,
+			Image: container.Image,
+		})
+	}
+
+	return response, nil
+}
+
+func (p *proxyContainerApi) Create(_ context.Context, _ *v1.CreateRequest) (*v1.CreateResponse, error) {
+	panic("not implemented") // TODO: Implement
+}
+
+func (p *proxyContainerApi) Start(_ context.Context, _ *v1.StartRequest) (*v1.StartResponse, error) {
+	panic("not implemented") // TODO: Implement
+}
+
+func (p *proxyContainerApi) Stop(_ context.Context, _ *v1.StopRequest) (*empty.Empty, error) {
+	panic("not implemented") // TODO: Implement
+}
+
+func (p *proxyContainerApi) Kill(_ context.Context, _ *v1.KillRequest) (*empty.Empty, error) {
+	panic("not implemented") // TODO: Implement
+}
+
+func (p *proxyContainerApi) Delete(_ context.Context, _ *v1.DeleteRequest) (*empty.Empty, error) {
+	panic("not implemented") // TODO: Implement
+}
+
+func (p *proxyContainerApi) Update(_ context.Context, _ *v1.UpdateRequest) (*v1.UpdateResponse, error) {
+	panic("not implemented") // TODO: Implement
+}
+
+func (p *proxyContainerApi) Exec(_ context.Context, _ *v1.ExecRequest) (*v1.ExecResponse, error) {
+	panic("not implemented") // TODO: Implement
+}

server/server.go

@@ -29,17 +29,26 @@ package server
 
 import (
 	"context"
+	"errors"
 
+	"github.com/docker/api/client"
+	apicontext "github.com/docker/api/context"
+	"github.com/docker/api/context/store"
+	"github.com/docker/api/server/proxy"
 	grpc_prometheus "github.com/grpc-ecosystem/go-grpc-prometheus"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/health"
 	"google.golang.org/grpc/health/grpc_health_v1"
+	"google.golang.org/grpc/metadata"
 )
 
 // New returns a new GRPC server.
 func New() *grpc.Server {
 	s := grpc.NewServer(
-		grpc.UnaryInterceptor(unary),
+		grpc.ChainUnaryInterceptor(
+			unaryMeta,
+			unary,
+		),
 		grpc.StreamInterceptor(stream),
 	)
 	hs := health.NewServer()
@@ -54,3 +63,33 @@ func unary(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, han
 func stream(srv interface{}, ss grpc.ServerStream, info *grpc.StreamServerInfo, handler grpc.StreamHandler) error {
 	return grpc_prometheus.StreamServerInterceptor(srv, ss, info, handler)
 }
+
+func unaryMeta(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error) {
+	md, ok := metadata.FromIncomingContext(ctx)
+	if !ok {
+		return nil, errors.New("missing metadata")
+	}
+
+	key := md[apicontext.KEY]
+
+	if len(key) == 1 {
+		s, err := store.New()
+		if err != nil {
+			return nil, err
+		}
+		ctx = store.WithContextStore(ctx, s)
+
+		ctx = apicontext.WithCurrentContext(ctx, key[0])
+
+		c, err := client.New(ctx)
+		if err != nil {
+			return nil, err
+		}
+		ctx, err = proxy.WithClient(ctx, c)
+		if err != nil {
+			return nil, err
+		}
+	}
+	m, err := handler(ctx, req)
+	return m, err
+}