From 0133556d2c49273e069f241868093afc440b663d Mon Sep 17 00:00:00 2001
From: Akshay Chawla <ak.chawla@f5.com>
Date: Fri, 29 Aug 2025 10:48:07 +0100
Subject: [PATCH 1/6] Added a new externalfile server

---
 Makefile                                      |  3 +-
 .../utils/grpc_management_plane_utils.go      |  2 +-
 test/mock/grpc/README.md                      |  3 ++
 test/mock/grpc/cmd/main.go                    | 38 ++++++++++++++++---
 .../grpc/mock_management_command_service.go   | 28 +++++++++++++-
 test/mock/grpc/mock_management_server.go      | 10 +++--
 6 files changed, 72 insertions(+), 12 deletions(-)

diff --git a/Makefile b/Makefile
index d436d3582..7b6c34264 100644
--- a/Makefile
+++ b/Makefile
@@ -66,6 +66,7 @@ DEB_PACKAGE := ./build/$(PACKAGE_NAME).deb
 RPM_PACKAGE := ./build/$(PACKAGE_NAME).rpm
 
 MOCK_MANAGEMENT_PLANE_CONFIG_DIRECTORY ?= 
+MOCK_MANAGEMENT_PLANE_EXTERNAL_FILE_SERVER ?= 
 MOCK_MANAGEMENT_PLANE_LOG_LEVEL ?= INFO
 MOCK_MANAGEMENT_PLANE_GRPC_ADDRESS ?= 127.0.0.1:0
 MOCK_MANAGEMENT_PLANE_API_ADDRESS ?= 127.0.0.1:0
@@ -193,7 +194,7 @@ race-condition-dev: ## Run agent executable with race condition detection
 
 run-mock-management-grpc-server: ## Run mock management plane gRPC server
 	@echo "🖲️ Running mock management plane gRPC server"
-	$(GORUN) test/mock/grpc/cmd/main.go -configDirectory=$(MOCK_MANAGEMENT_PLANE_CONFIG_DIRECTORY) -logLevel=$(MOCK_MANAGEMENT_PLANE_LOG_LEVEL) -grpcAddress=$(MOCK_MANAGEMENT_PLANE_GRPC_ADDRESS) -apiAddress=$(MOCK_MANAGEMENT_PLANE_API_ADDRESS)
+	$(GORUN) test/mock/grpc/cmd/main.go -configDirectory=$(MOCK_MANAGEMENT_PLANE_CONFIG_DIRECTORY) -logLevel=$(MOCK_MANAGEMENT_PLANE_LOG_LEVEL) -grpcAddress=$(MOCK_MANAGEMENT_PLANE_GRPC_ADDRESS) -apiAddress=$(MOCK_MANAGEMENT_PLANE_API_ADDRESS) -externalFileServer=$(MOCK_MANAGEMENT_PLANE_EXTERNAL_FILE_SERVER)
 
 
 .PHONY: build-test-nginx-plus-and-nap-image
diff --git a/test/integration/utils/grpc_management_plane_utils.go b/test/integration/utils/grpc_management_plane_utils.go
index de8d20f72..ad11b6dce 100644
--- a/test/integration/utils/grpc_management_plane_utils.go
+++ b/test/integration/utils/grpc_management_plane_utils.go
@@ -188,7 +188,7 @@ func setupLocalEnvironment(tb testing.TB) {
 	ctx := context.Background()
 
 	requestChan := make(chan *mpi.ManagementPlaneRequest)
-	server := mockGrpc.NewCommandService(requestChan, os.TempDir())
+	server := mockGrpc.NewCommandService(requestChan, os.TempDir(), os.TempDir())
 
 	go func(tb testing.TB) {
 		tb.Helper()
diff --git a/test/mock/grpc/README.md b/test/mock/grpc/README.md
index 7272f5457..cb10c1c92 100644
--- a/test/mock/grpc/README.md
+++ b/test/mock/grpc/README.md
@@ -12,6 +12,7 @@ To override these behaviours the following environment variables can be set to o
 MOCK_MANAGEMENT_PLANE_GRPC_ADDRESS=127.0.0.1:9091
 MOCK_MANAGEMENT_PLANE_API_ADDRESS=127.0.0.1:9092
 MOCK_MANAGEMENT_PLANE_CONFIG_DIRECTORY=/tmp/
+MOCK_MANAGEMENT_PLANE_EXTERNAL_FILE_SERVER=/tmp/
 ```
 
 Before starting the NGINX Agent, update the agent configuration with the following command config block
@@ -35,6 +36,8 @@ GET http://127.0.0.1:9092/api/v1/responses
 POST http://127.0.0.1:9092/api/v1/requests
 
 POST http://127.0.0.1:9092/api/v1/instance/<instance id>/config/apply
+
+GET http://127.0.0.1:9092/api/v1/externalfile/<filename>
 ```
 
 # Endpoints
diff --git a/test/mock/grpc/cmd/main.go b/test/mock/grpc/cmd/main.go
index 250e476fa..a50f034ac 100644
--- a/test/mock/grpc/cmd/main.go
+++ b/test/mock/grpc/cmd/main.go
@@ -27,11 +27,12 @@ const (
 )
 
 var (
-	sleepDuration   = flag.Duration("sleepDuration", defaultSleepDuration, "duration between changes in health")
-	configDirectory = flag.String("configDirectory", "", "set the directory where the config files are stored")
-	grpcAddress     = flag.String("grpcAddress", "127.0.0.1:0", "set the gRPC address to run the server on")
-	apiAddress      = flag.String("apiAddress", "127.0.0.1:0", "set the API address to run the server on")
-	logLevel        = flag.String("logLevel", "INFO", "set the log level")
+	sleepDuration      = flag.Duration("sleepDuration", defaultSleepDuration, "duration between changes in health")
+	configDirectory    = flag.String("configDirectory", "", "set the directory where the config files are stored")
+	externalFileServer = flag.String("externalFileServer", "", "set the directory for external file server")
+	grpcAddress        = flag.String("grpcAddress", "127.0.0.1:0", "set the gRPC address to run the server on")
+	apiAddress         = flag.String("apiAddress", "127.0.0.1:0", "set the API address to run the server on")
+	logLevel           = flag.String("logLevel", "INFO", "set the log level")
 )
 
 func main() {
@@ -74,9 +75,18 @@ func main() {
 		}
 	}
 
+	if externalFileServer == nil || *externalFileServer == "" {
+		defaultExternalFileServer, externalFileServerErr := generateDefaultExternalFileSevrevDirectory()
+		externalFileServer = &defaultExternalFileServer
+		if externalFileServerErr != nil {
+			slog.ErrorContext(ctx, "Failed to create default config directory", "error", err)
+			os.Exit(1)
+		}
+	}
+
 	slog.DebugContext(ctx, "Config directory", "directory", *configDirectory)
 
-	_, err = grpc.NewMockManagementServer(ctx, *apiAddress, agentConfig, configDirectory)
+	_, err = grpc.NewMockManagementServer(ctx, *apiAddress, agentConfig, configDirectory, externalFileServer)
 	if err != nil {
 		slog.ErrorContext(ctx, "Failed to start mock management server", "error", err)
 		os.Exit(1)
@@ -99,3 +109,19 @@ func generateDefaultConfigDirectory() (string, error) {
 
 	return configDirectory, nil
 }
+
+func generateDefaultExternalFileSevrevDirectory() (string, error) {
+	slog.Info("Generating external file server directory")
+	tempDirectory := os.TempDir()
+	externalFileServer := filepath.Join(tempDirectory, "externalfileserver")
+
+	err := os.MkdirAll(externalFileServer, directoryPermissions)
+	if err != nil {
+		slog.Error("Failed to create external file server directory", "error", err)
+		return "", err
+	}
+
+	slog.Info("Created default external file server directory", "directory", externalFileServer)
+
+	return externalFileServer, nil
+}
diff --git a/test/mock/grpc/mock_management_command_service.go b/test/mock/grpc/mock_management_command_service.go
index ff0d753af..5f2115405 100644
--- a/test/mock/grpc/mock_management_command_service.go
+++ b/test/mock/grpc/mock_management_command_service.go
@@ -39,6 +39,7 @@ type CommandService struct {
 	updateDataPlaneHealthRequest *mpi.UpdateDataPlaneHealthRequest
 	instanceFiles                map[string][]*mpi.File // key is instanceID
 	configDirectory              string
+	externalFileServer           string
 	dataPlaneResponses           []*mpi.DataPlaneResponse
 	updateDataPlaneHealthMutex   sync.Mutex
 	connectionMutex              sync.Mutex
@@ -50,7 +51,10 @@ func init() {
 	gin.SetMode(gin.ReleaseMode)
 }
 
-func NewCommandService(requestChan chan *mpi.ManagementPlaneRequest, configDirectory string) *CommandService {
+func NewCommandService(
+	requestChan chan *mpi.ManagementPlaneRequest,
+	configDirectory string,
+	externalFileServer string) *CommandService {
 	cs := &CommandService{
 		requestChan:                requestChan,
 		connectionMutex:            sync.Mutex{},
@@ -58,6 +62,7 @@ func NewCommandService(requestChan chan *mpi.ManagementPlaneRequest, configDirec
 		updateDataPlaneHealthMutex: sync.Mutex{},
 		dataPlaneResponsesMutex:    sync.Mutex{},
 		configDirectory:            configDirectory,
+		externalFileServer:         externalFileServer,
 		instanceFiles:              make(map[string][]*mpi.File),
 	}
 
@@ -246,6 +251,7 @@ func (cs *CommandService) createServer(logger *slog.Logger) {
 	cs.addResponseAndRequestEndpoints()
 	cs.addConfigApplyEndpoint()
 	cs.addConfigEndpoint()
+	cs.addExternalFileServerEndpoint()
 }
 
 func (cs *CommandService) addConnectionEndpoint() {
@@ -410,6 +416,26 @@ func (cs *CommandService) addConfigEndpoint() {
 	})
 }
 
+func (cs *CommandService) addExternalFileServerEndpoint() {
+	// This API will serve individual files from the external directory
+	cs.server.GET("/api/v1/externalfile/:filename", func(c *gin.Context) {
+		filename := c.Param("filename")
+		filePath := filepath.Join(cs.externalFileServer, filename)
+
+		// Check if the file exists
+		if _, err := os.Stat(filePath); os.IsNotExist(err) {
+			c.JSON(http.StatusNotFound, gin.H{"error": "File not found"})
+
+			return
+		}
+
+		// Serve the file
+		c.File(filePath)
+	})
+
+	slog.Info("Serving individual external files from", "directory", cs.externalFileServer)
+}
+
 func (cs *CommandService) findInstanceConfigFiles(instanceID string) (configFiles []*mpi.File, err error) {
 	instanceDirectory := filepath.Join(cs.configDirectory, instanceID)
 
diff --git a/test/mock/grpc/mock_management_server.go b/test/mock/grpc/mock_management_server.go
index 155c267fe..233c2b18e 100644
--- a/test/mock/grpc/mock_management_server.go
+++ b/test/mock/grpc/mock_management_server.go
@@ -18,7 +18,7 @@ import (
 	"syscall"
 	"time"
 
-	"github.com/nginx/agent/v3/api/grpc/mpi/v1"
+	v1 "github.com/nginx/agent/v3/api/grpc/mpi/v1"
 	"github.com/nginx/agent/v3/internal/config"
 
 	"github.com/bufbuild/protovalidate-go"
@@ -68,11 +68,13 @@ func NewMockManagementServer(
 	apiAddress string,
 	agentConfig *config.Config,
 	configDirectory *string,
+	externalFileServer *string,
 ) (*MockManagementServer, error) {
 	var err error
 	requestChan := make(chan *v1.ManagementPlaneRequest)
 
-	commandService := serveCommandService(ctx, apiAddress, agentConfig, requestChan, *configDirectory)
+	commandService := serveCommandService(ctx, apiAddress, agentConfig, requestChan, *configDirectory,
+		*externalFileServer)
 
 	var fileServer *FileService
 
@@ -180,14 +182,16 @@ func serverOptions(agentConfig *config.Config) []grpc.ServerOption {
 	return opts
 }
 
+//nolint:revive // Have to add a new parameter here to support external file server
 func serveCommandService(
 	ctx context.Context,
 	apiAddress string,
 	agentConfig *config.Config,
 	requestChan chan *v1.ManagementPlaneRequest,
 	configDirectory string,
+	externalFileServer string,
 ) *CommandService {
-	commandServer := NewCommandService(requestChan, configDirectory)
+	commandServer := NewCommandService(requestChan, configDirectory, externalFileServer)
 
 	go func() {
 		cmdListener, listenerErr := createListener(ctx, apiAddress, agentConfig)

From d9076e30fa9ba264d2494a7a5cb39dc93f81ba0d Mon Sep 17 00:00:00 2001
From: Akshay Chawla <ak.chawla@f5.com>
Date: Fri, 29 Aug 2025 14:49:22 +0100
Subject: [PATCH 2/6] Updated config-apply api

---
 api/grpc/mpi/v1/files.pb.go                   | 245 +++++++++++-------
 api/grpc/mpi/v1/files.pb.validate.go          | 137 ++++++++++
 api/grpc/mpi/v1/files.proto                   |   7 +
 docs/proto/protos.md                          |  17 ++
 test/mock/grpc/README.md                      |  71 ++++-
 .../grpc/mock_management_command_service.go   |  55 +++-
 test/mock/grpc/mock_management_server.go      |   2 +-
 7 files changed, 438 insertions(+), 96 deletions(-)

diff --git a/api/grpc/mpi/v1/files.pb.go b/api/grpc/mpi/v1/files.pb.go
index 1873a19e2..4fe57bb7c 100644
--- a/api/grpc/mpi/v1/files.pb.go
+++ b/api/grpc/mpi/v1/files.pb.go
@@ -688,9 +688,11 @@ type File struct {
 	// Meta information about the file, the name (including path) and hash
 	FileMeta *FileMeta `protobuf:"bytes,1,opt,name=file_meta,json=fileMeta,proto3" json:"file_meta,omitempty"`
 	// Unmanaged files will not be modified
-	Unmanaged     bool `protobuf:"varint,2,opt,name=unmanaged,proto3" json:"unmanaged,omitempty"`
-	unknownFields protoimpl.UnknownFields
-	sizeCache     protoimpl.SizeCache
+	Unmanaged bool `protobuf:"varint,2,opt,name=unmanaged,proto3" json:"unmanaged,omitempty"`
+	// external file source
+	ExternalDataSource *ExternalDataSource `protobuf:"bytes,3,opt,name=external_data_source,json=externalDataSource,proto3,oneof" json:"external_data_source,omitempty"`
+	unknownFields      protoimpl.UnknownFields
+	sizeCache          protoimpl.SizeCache
 }
 
 func (x *File) Reset() {
@@ -737,6 +739,58 @@ func (x *File) GetUnmanaged() bool {
 	return false
 }
 
+func (x *File) GetExternalDataSource() *ExternalDataSource {
+	if x != nil {
+		return x.ExternalDataSource
+	}
+	return nil
+}
+
+type ExternalDataSource struct {
+	state protoimpl.MessageState `protogen:"open.v1"`
+	// URL to the location of an external file
+	Location      string `protobuf:"bytes,1,opt,name=location,proto3" json:"location,omitempty"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *ExternalDataSource) Reset() {
+	*x = ExternalDataSource{}
+	mi := &file_mpi_v1_files_proto_msgTypes[10]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *ExternalDataSource) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ExternalDataSource) ProtoMessage() {}
+
+func (x *ExternalDataSource) ProtoReflect() protoreflect.Message {
+	mi := &file_mpi_v1_files_proto_msgTypes[10]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use ExternalDataSource.ProtoReflect.Descriptor instead.
+func (*ExternalDataSource) Descriptor() ([]byte, []int) {
+	return file_mpi_v1_files_proto_rawDescGZIP(), []int{10}
+}
+
+func (x *ExternalDataSource) GetLocation() string {
+	if x != nil {
+		return x.Location
+	}
+	return ""
+}
+
 // Represents the get file request
 type GetFileRequest struct {
 	state protoimpl.MessageState `protogen:"open.v1"`
@@ -750,7 +804,7 @@ type GetFileRequest struct {
 
 func (x *GetFileRequest) Reset() {
 	*x = GetFileRequest{}
-	mi := &file_mpi_v1_files_proto_msgTypes[10]
+	mi := &file_mpi_v1_files_proto_msgTypes[11]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -762,7 +816,7 @@ func (x *GetFileRequest) String() string {
 func (*GetFileRequest) ProtoMessage() {}
 
 func (x *GetFileRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_mpi_v1_files_proto_msgTypes[10]
+	mi := &file_mpi_v1_files_proto_msgTypes[11]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -775,7 +829,7 @@ func (x *GetFileRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use GetFileRequest.ProtoReflect.Descriptor instead.
 func (*GetFileRequest) Descriptor() ([]byte, []int) {
-	return file_mpi_v1_files_proto_rawDescGZIP(), []int{10}
+	return file_mpi_v1_files_proto_rawDescGZIP(), []int{11}
 }
 
 func (x *GetFileRequest) GetMessageMeta() *MessageMeta {
@@ -803,7 +857,7 @@ type GetFileResponse struct {
 
 func (x *GetFileResponse) Reset() {
 	*x = GetFileResponse{}
-	mi := &file_mpi_v1_files_proto_msgTypes[11]
+	mi := &file_mpi_v1_files_proto_msgTypes[12]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -815,7 +869,7 @@ func (x *GetFileResponse) String() string {
 func (*GetFileResponse) ProtoMessage() {}
 
 func (x *GetFileResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_mpi_v1_files_proto_msgTypes[11]
+	mi := &file_mpi_v1_files_proto_msgTypes[12]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -828,7 +882,7 @@ func (x *GetFileResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use GetFileResponse.ProtoReflect.Descriptor instead.
 func (*GetFileResponse) Descriptor() ([]byte, []int) {
-	return file_mpi_v1_files_proto_rawDescGZIP(), []int{11}
+	return file_mpi_v1_files_proto_rawDescGZIP(), []int{12}
 }
 
 func (x *GetFileResponse) GetContents() *FileContents {
@@ -849,7 +903,7 @@ type FileContents struct {
 
 func (x *FileContents) Reset() {
 	*x = FileContents{}
-	mi := &file_mpi_v1_files_proto_msgTypes[12]
+	mi := &file_mpi_v1_files_proto_msgTypes[13]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -861,7 +915,7 @@ func (x *FileContents) String() string {
 func (*FileContents) ProtoMessage() {}
 
 func (x *FileContents) ProtoReflect() protoreflect.Message {
-	mi := &file_mpi_v1_files_proto_msgTypes[12]
+	mi := &file_mpi_v1_files_proto_msgTypes[13]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -874,7 +928,7 @@ func (x *FileContents) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use FileContents.ProtoReflect.Descriptor instead.
 func (*FileContents) Descriptor() ([]byte, []int) {
-	return file_mpi_v1_files_proto_rawDescGZIP(), []int{12}
+	return file_mpi_v1_files_proto_rawDescGZIP(), []int{13}
 }
 
 func (x *FileContents) GetContents() []byte {
@@ -909,7 +963,7 @@ type FileMeta struct {
 
 func (x *FileMeta) Reset() {
 	*x = FileMeta{}
-	mi := &file_mpi_v1_files_proto_msgTypes[13]
+	mi := &file_mpi_v1_files_proto_msgTypes[14]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -921,7 +975,7 @@ func (x *FileMeta) String() string {
 func (*FileMeta) ProtoMessage() {}
 
 func (x *FileMeta) ProtoReflect() protoreflect.Message {
-	mi := &file_mpi_v1_files_proto_msgTypes[13]
+	mi := &file_mpi_v1_files_proto_msgTypes[14]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -934,7 +988,7 @@ func (x *FileMeta) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use FileMeta.ProtoReflect.Descriptor instead.
 func (*FileMeta) Descriptor() ([]byte, []int) {
-	return file_mpi_v1_files_proto_rawDescGZIP(), []int{13}
+	return file_mpi_v1_files_proto_rawDescGZIP(), []int{14}
 }
 
 func (x *FileMeta) GetName() string {
@@ -1013,7 +1067,7 @@ type UpdateFileRequest struct {
 
 func (x *UpdateFileRequest) Reset() {
 	*x = UpdateFileRequest{}
-	mi := &file_mpi_v1_files_proto_msgTypes[14]
+	mi := &file_mpi_v1_files_proto_msgTypes[15]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -1025,7 +1079,7 @@ func (x *UpdateFileRequest) String() string {
 func (*UpdateFileRequest) ProtoMessage() {}
 
 func (x *UpdateFileRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_mpi_v1_files_proto_msgTypes[14]
+	mi := &file_mpi_v1_files_proto_msgTypes[15]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1038,7 +1092,7 @@ func (x *UpdateFileRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use UpdateFileRequest.ProtoReflect.Descriptor instead.
 func (*UpdateFileRequest) Descriptor() ([]byte, []int) {
-	return file_mpi_v1_files_proto_rawDescGZIP(), []int{14}
+	return file_mpi_v1_files_proto_rawDescGZIP(), []int{15}
 }
 
 func (x *UpdateFileRequest) GetFile() *File {
@@ -1073,7 +1127,7 @@ type UpdateFileResponse struct {
 
 func (x *UpdateFileResponse) Reset() {
 	*x = UpdateFileResponse{}
-	mi := &file_mpi_v1_files_proto_msgTypes[15]
+	mi := &file_mpi_v1_files_proto_msgTypes[16]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -1085,7 +1139,7 @@ func (x *UpdateFileResponse) String() string {
 func (*UpdateFileResponse) ProtoMessage() {}
 
 func (x *UpdateFileResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_mpi_v1_files_proto_msgTypes[15]
+	mi := &file_mpi_v1_files_proto_msgTypes[16]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1098,7 +1152,7 @@ func (x *UpdateFileResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use UpdateFileResponse.ProtoReflect.Descriptor instead.
 func (*UpdateFileResponse) Descriptor() ([]byte, []int) {
-	return file_mpi_v1_files_proto_rawDescGZIP(), []int{15}
+	return file_mpi_v1_files_proto_rawDescGZIP(), []int{16}
 }
 
 func (x *UpdateFileResponse) GetFileMeta() *FileMeta {
@@ -1132,7 +1186,7 @@ type CertificateMeta struct {
 
 func (x *CertificateMeta) Reset() {
 	*x = CertificateMeta{}
-	mi := &file_mpi_v1_files_proto_msgTypes[16]
+	mi := &file_mpi_v1_files_proto_msgTypes[17]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -1144,7 +1198,7 @@ func (x *CertificateMeta) String() string {
 func (*CertificateMeta) ProtoMessage() {}
 
 func (x *CertificateMeta) ProtoReflect() protoreflect.Message {
-	mi := &file_mpi_v1_files_proto_msgTypes[16]
+	mi := &file_mpi_v1_files_proto_msgTypes[17]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1157,7 +1211,7 @@ func (x *CertificateMeta) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use CertificateMeta.ProtoReflect.Descriptor instead.
 func (*CertificateMeta) Descriptor() ([]byte, []int) {
-	return file_mpi_v1_files_proto_rawDescGZIP(), []int{16}
+	return file_mpi_v1_files_proto_rawDescGZIP(), []int{17}
 }
 
 func (x *CertificateMeta) GetSerialNumber() string {
@@ -1222,7 +1276,7 @@ type CertificateDates struct {
 
 func (x *CertificateDates) Reset() {
 	*x = CertificateDates{}
-	mi := &file_mpi_v1_files_proto_msgTypes[17]
+	mi := &file_mpi_v1_files_proto_msgTypes[18]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -1234,7 +1288,7 @@ func (x *CertificateDates) String() string {
 func (*CertificateDates) ProtoMessage() {}
 
 func (x *CertificateDates) ProtoReflect() protoreflect.Message {
-	mi := &file_mpi_v1_files_proto_msgTypes[17]
+	mi := &file_mpi_v1_files_proto_msgTypes[18]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1247,7 +1301,7 @@ func (x *CertificateDates) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use CertificateDates.ProtoReflect.Descriptor instead.
 func (*CertificateDates) Descriptor() ([]byte, []int) {
-	return file_mpi_v1_files_proto_rawDescGZIP(), []int{17}
+	return file_mpi_v1_files_proto_rawDescGZIP(), []int{18}
 }
 
 func (x *CertificateDates) GetNotBefore() int64 {
@@ -1277,7 +1331,7 @@ type SubjectAlternativeNames struct {
 
 func (x *SubjectAlternativeNames) Reset() {
 	*x = SubjectAlternativeNames{}
-	mi := &file_mpi_v1_files_proto_msgTypes[18]
+	mi := &file_mpi_v1_files_proto_msgTypes[19]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -1289,7 +1343,7 @@ func (x *SubjectAlternativeNames) String() string {
 func (*SubjectAlternativeNames) ProtoMessage() {}
 
 func (x *SubjectAlternativeNames) ProtoReflect() protoreflect.Message {
-	mi := &file_mpi_v1_files_proto_msgTypes[18]
+	mi := &file_mpi_v1_files_proto_msgTypes[19]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1302,7 +1356,7 @@ func (x *SubjectAlternativeNames) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use SubjectAlternativeNames.ProtoReflect.Descriptor instead.
 func (*SubjectAlternativeNames) Descriptor() ([]byte, []int) {
-	return file_mpi_v1_files_proto_rawDescGZIP(), []int{18}
+	return file_mpi_v1_files_proto_rawDescGZIP(), []int{19}
 }
 
 func (x *SubjectAlternativeNames) GetDnsNames() []string {
@@ -1354,7 +1408,7 @@ type X509Name struct {
 
 func (x *X509Name) Reset() {
 	*x = X509Name{}
-	mi := &file_mpi_v1_files_proto_msgTypes[19]
+	mi := &file_mpi_v1_files_proto_msgTypes[20]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -1366,7 +1420,7 @@ func (x *X509Name) String() string {
 func (*X509Name) ProtoMessage() {}
 
 func (x *X509Name) ProtoReflect() protoreflect.Message {
-	mi := &file_mpi_v1_files_proto_msgTypes[19]
+	mi := &file_mpi_v1_files_proto_msgTypes[20]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1379,7 +1433,7 @@ func (x *X509Name) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use X509Name.ProtoReflect.Descriptor instead.
 func (*X509Name) Descriptor() ([]byte, []int) {
-	return file_mpi_v1_files_proto_rawDescGZIP(), []int{19}
+	return file_mpi_v1_files_proto_rawDescGZIP(), []int{20}
 }
 
 func (x *X509Name) GetCountry() []string {
@@ -1471,7 +1525,7 @@ type AttributeTypeAndValue struct {
 
 func (x *AttributeTypeAndValue) Reset() {
 	*x = AttributeTypeAndValue{}
-	mi := &file_mpi_v1_files_proto_msgTypes[20]
+	mi := &file_mpi_v1_files_proto_msgTypes[21]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -1483,7 +1537,7 @@ func (x *AttributeTypeAndValue) String() string {
 func (*AttributeTypeAndValue) ProtoMessage() {}
 
 func (x *AttributeTypeAndValue) ProtoReflect() protoreflect.Message {
-	mi := &file_mpi_v1_files_proto_msgTypes[20]
+	mi := &file_mpi_v1_files_proto_msgTypes[21]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1496,7 +1550,7 @@ func (x *AttributeTypeAndValue) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use AttributeTypeAndValue.ProtoReflect.Descriptor instead.
 func (*AttributeTypeAndValue) Descriptor() ([]byte, []int) {
-	return file_mpi_v1_files_proto_rawDescGZIP(), []int{20}
+	return file_mpi_v1_files_proto_rawDescGZIP(), []int{21}
 }
 
 func (x *AttributeTypeAndValue) GetType() string {
@@ -1549,10 +1603,14 @@ const file_mpi_v1_files_proto_rawDesc = "" +
 	"\x05files\x18\x01 \x03(\v2\f.mpi.v1.FileR\x05files\x12<\n" +
 	"\x0econfig_version\x18\x02 \x01(\v2\x15.mpi.v1.ConfigVersionR\rconfigVersion\x12\x1f\n" +
 	"\vconfig_path\x18\x03 \x01(\tR\n" +
-	"configPath\"S\n" +
+	"configPath\"\xbf\x01\n" +
 	"\x04File\x12-\n" +
 	"\tfile_meta\x18\x01 \x01(\v2\x10.mpi.v1.FileMetaR\bfileMeta\x12\x1c\n" +
-	"\tunmanaged\x18\x02 \x01(\bR\tunmanaged\"w\n" +
+	"\tunmanaged\x18\x02 \x01(\bR\tunmanaged\x12Q\n" +
+	"\x14external_data_source\x18\x03 \x01(\v2\x1a.mpi.v1.ExternalDataSourceH\x00R\x12externalDataSource\x88\x01\x01B\x17\n" +
+	"\x15_external_data_source\"0\n" +
+	"\x12ExternalDataSource\x12\x1a\n" +
+	"\blocation\x18\x01 \x01(\tR\blocation\"w\n" +
 	"\x0eGetFileRequest\x126\n" +
 	"\fmessage_meta\x18\x01 \x01(\v2\x13.mpi.v1.MessageMetaR\vmessageMeta\x12-\n" +
 	"\tfile_meta\x18\x02 \x01(\v2\x10.mpi.v1.FileMetaR\bfileMeta\"C\n" +
@@ -1649,7 +1707,7 @@ func file_mpi_v1_files_proto_rawDescGZIP() []byte {
 }
 
 var file_mpi_v1_files_proto_enumTypes = make([]protoimpl.EnumInfo, 1)
-var file_mpi_v1_files_proto_msgTypes = make([]protoimpl.MessageInfo, 21)
+var file_mpi_v1_files_proto_msgTypes = make([]protoimpl.MessageInfo, 22)
 var file_mpi_v1_files_proto_goTypes = []any{
 	(SignatureAlgorithm)(0),         // 0: mpi.v1.SignatureAlgorithm
 	(*FileDataChunk)(nil),           // 1: mpi.v1.FileDataChunk
@@ -1662,67 +1720,69 @@ var file_mpi_v1_files_proto_goTypes = []any{
 	(*ConfigVersion)(nil),           // 8: mpi.v1.ConfigVersion
 	(*FileOverview)(nil),            // 9: mpi.v1.FileOverview
 	(*File)(nil),                    // 10: mpi.v1.File
-	(*GetFileRequest)(nil),          // 11: mpi.v1.GetFileRequest
-	(*GetFileResponse)(nil),         // 12: mpi.v1.GetFileResponse
-	(*FileContents)(nil),            // 13: mpi.v1.FileContents
-	(*FileMeta)(nil),                // 14: mpi.v1.FileMeta
-	(*UpdateFileRequest)(nil),       // 15: mpi.v1.UpdateFileRequest
-	(*UpdateFileResponse)(nil),      // 16: mpi.v1.UpdateFileResponse
-	(*CertificateMeta)(nil),         // 17: mpi.v1.CertificateMeta
-	(*CertificateDates)(nil),        // 18: mpi.v1.CertificateDates
-	(*SubjectAlternativeNames)(nil), // 19: mpi.v1.SubjectAlternativeNames
-	(*X509Name)(nil),                // 20: mpi.v1.X509Name
-	(*AttributeTypeAndValue)(nil),   // 21: mpi.v1.AttributeTypeAndValue
-	(*MessageMeta)(nil),             // 22: mpi.v1.MessageMeta
-	(*timestamppb.Timestamp)(nil),   // 23: google.protobuf.Timestamp
+	(*ExternalDataSource)(nil),      // 11: mpi.v1.ExternalDataSource
+	(*GetFileRequest)(nil),          // 12: mpi.v1.GetFileRequest
+	(*GetFileResponse)(nil),         // 13: mpi.v1.GetFileResponse
+	(*FileContents)(nil),            // 14: mpi.v1.FileContents
+	(*FileMeta)(nil),                // 15: mpi.v1.FileMeta
+	(*UpdateFileRequest)(nil),       // 16: mpi.v1.UpdateFileRequest
+	(*UpdateFileResponse)(nil),      // 17: mpi.v1.UpdateFileResponse
+	(*CertificateMeta)(nil),         // 18: mpi.v1.CertificateMeta
+	(*CertificateDates)(nil),        // 19: mpi.v1.CertificateDates
+	(*SubjectAlternativeNames)(nil), // 20: mpi.v1.SubjectAlternativeNames
+	(*X509Name)(nil),                // 21: mpi.v1.X509Name
+	(*AttributeTypeAndValue)(nil),   // 22: mpi.v1.AttributeTypeAndValue
+	(*MessageMeta)(nil),             // 23: mpi.v1.MessageMeta
+	(*timestamppb.Timestamp)(nil),   // 24: google.protobuf.Timestamp
 }
 var file_mpi_v1_files_proto_depIdxs = []int32{
-	22, // 0: mpi.v1.FileDataChunk.meta:type_name -> mpi.v1.MessageMeta
+	23, // 0: mpi.v1.FileDataChunk.meta:type_name -> mpi.v1.MessageMeta
 	2,  // 1: mpi.v1.FileDataChunk.header:type_name -> mpi.v1.FileDataChunkHeader
 	3,  // 2: mpi.v1.FileDataChunk.content:type_name -> mpi.v1.FileDataChunkContent
-	14, // 3: mpi.v1.FileDataChunkHeader.file_meta:type_name -> mpi.v1.FileMeta
-	22, // 4: mpi.v1.GetOverviewRequest.message_meta:type_name -> mpi.v1.MessageMeta
+	15, // 3: mpi.v1.FileDataChunkHeader.file_meta:type_name -> mpi.v1.FileMeta
+	23, // 4: mpi.v1.GetOverviewRequest.message_meta:type_name -> mpi.v1.MessageMeta
 	8,  // 5: mpi.v1.GetOverviewRequest.config_version:type_name -> mpi.v1.ConfigVersion
 	9,  // 6: mpi.v1.GetOverviewResponse.overview:type_name -> mpi.v1.FileOverview
-	22, // 7: mpi.v1.UpdateOverviewRequest.message_meta:type_name -> mpi.v1.MessageMeta
+	23, // 7: mpi.v1.UpdateOverviewRequest.message_meta:type_name -> mpi.v1.MessageMeta
 	9,  // 8: mpi.v1.UpdateOverviewRequest.overview:type_name -> mpi.v1.FileOverview
 	9,  // 9: mpi.v1.UpdateOverviewResponse.overview:type_name -> mpi.v1.FileOverview
 	10, // 10: mpi.v1.FileOverview.files:type_name -> mpi.v1.File
 	8,  // 11: mpi.v1.FileOverview.config_version:type_name -> mpi.v1.ConfigVersion
-	14, // 12: mpi.v1.File.file_meta:type_name -> mpi.v1.FileMeta
-	22, // 13: mpi.v1.GetFileRequest.message_meta:type_name -> mpi.v1.MessageMeta
-	14, // 14: mpi.v1.GetFileRequest.file_meta:type_name -> mpi.v1.FileMeta
-	13, // 15: mpi.v1.GetFileResponse.contents:type_name -> mpi.v1.FileContents
-	23, // 16: mpi.v1.FileMeta.modified_time:type_name -> google.protobuf.Timestamp
-	17, // 17: mpi.v1.FileMeta.certificate_meta:type_name -> mpi.v1.CertificateMeta
-	10, // 18: mpi.v1.UpdateFileRequest.file:type_name -> mpi.v1.File
-	13, // 19: mpi.v1.UpdateFileRequest.contents:type_name -> mpi.v1.FileContents
-	22, // 20: mpi.v1.UpdateFileRequest.message_meta:type_name -> mpi.v1.MessageMeta
-	14, // 21: mpi.v1.UpdateFileResponse.file_meta:type_name -> mpi.v1.FileMeta
-	20, // 22: mpi.v1.CertificateMeta.issuer:type_name -> mpi.v1.X509Name
-	20, // 23: mpi.v1.CertificateMeta.subject:type_name -> mpi.v1.X509Name
-	19, // 24: mpi.v1.CertificateMeta.sans:type_name -> mpi.v1.SubjectAlternativeNames
-	18, // 25: mpi.v1.CertificateMeta.dates:type_name -> mpi.v1.CertificateDates
-	0,  // 26: mpi.v1.CertificateMeta.signature_algorithm:type_name -> mpi.v1.SignatureAlgorithm
-	21, // 27: mpi.v1.X509Name.names:type_name -> mpi.v1.AttributeTypeAndValue
-	21, // 28: mpi.v1.X509Name.extra_names:type_name -> mpi.v1.AttributeTypeAndValue
-	4,  // 29: mpi.v1.FileService.GetOverview:input_type -> mpi.v1.GetOverviewRequest
-	6,  // 30: mpi.v1.FileService.UpdateOverview:input_type -> mpi.v1.UpdateOverviewRequest
-	11, // 31: mpi.v1.FileService.GetFile:input_type -> mpi.v1.GetFileRequest
-	15, // 32: mpi.v1.FileService.UpdateFile:input_type -> mpi.v1.UpdateFileRequest
-	11, // 33: mpi.v1.FileService.GetFileStream:input_type -> mpi.v1.GetFileRequest
-	1,  // 34: mpi.v1.FileService.UpdateFileStream:input_type -> mpi.v1.FileDataChunk
-	5,  // 35: mpi.v1.FileService.GetOverview:output_type -> mpi.v1.GetOverviewResponse
-	7,  // 36: mpi.v1.FileService.UpdateOverview:output_type -> mpi.v1.UpdateOverviewResponse
-	12, // 37: mpi.v1.FileService.GetFile:output_type -> mpi.v1.GetFileResponse
-	16, // 38: mpi.v1.FileService.UpdateFile:output_type -> mpi.v1.UpdateFileResponse
-	1,  // 39: mpi.v1.FileService.GetFileStream:output_type -> mpi.v1.FileDataChunk
-	16, // 40: mpi.v1.FileService.UpdateFileStream:output_type -> mpi.v1.UpdateFileResponse
-	35, // [35:41] is the sub-list for method output_type
-	29, // [29:35] is the sub-list for method input_type
-	29, // [29:29] is the sub-list for extension type_name
-	29, // [29:29] is the sub-list for extension extendee
-	0,  // [0:29] is the sub-list for field type_name
+	15, // 12: mpi.v1.File.file_meta:type_name -> mpi.v1.FileMeta
+	11, // 13: mpi.v1.File.external_data_source:type_name -> mpi.v1.ExternalDataSource
+	23, // 14: mpi.v1.GetFileRequest.message_meta:type_name -> mpi.v1.MessageMeta
+	15, // 15: mpi.v1.GetFileRequest.file_meta:type_name -> mpi.v1.FileMeta
+	14, // 16: mpi.v1.GetFileResponse.contents:type_name -> mpi.v1.FileContents
+	24, // 17: mpi.v1.FileMeta.modified_time:type_name -> google.protobuf.Timestamp
+	18, // 18: mpi.v1.FileMeta.certificate_meta:type_name -> mpi.v1.CertificateMeta
+	10, // 19: mpi.v1.UpdateFileRequest.file:type_name -> mpi.v1.File
+	14, // 20: mpi.v1.UpdateFileRequest.contents:type_name -> mpi.v1.FileContents
+	23, // 21: mpi.v1.UpdateFileRequest.message_meta:type_name -> mpi.v1.MessageMeta
+	15, // 22: mpi.v1.UpdateFileResponse.file_meta:type_name -> mpi.v1.FileMeta
+	21, // 23: mpi.v1.CertificateMeta.issuer:type_name -> mpi.v1.X509Name
+	21, // 24: mpi.v1.CertificateMeta.subject:type_name -> mpi.v1.X509Name
+	20, // 25: mpi.v1.CertificateMeta.sans:type_name -> mpi.v1.SubjectAlternativeNames
+	19, // 26: mpi.v1.CertificateMeta.dates:type_name -> mpi.v1.CertificateDates
+	0,  // 27: mpi.v1.CertificateMeta.signature_algorithm:type_name -> mpi.v1.SignatureAlgorithm
+	22, // 28: mpi.v1.X509Name.names:type_name -> mpi.v1.AttributeTypeAndValue
+	22, // 29: mpi.v1.X509Name.extra_names:type_name -> mpi.v1.AttributeTypeAndValue
+	4,  // 30: mpi.v1.FileService.GetOverview:input_type -> mpi.v1.GetOverviewRequest
+	6,  // 31: mpi.v1.FileService.UpdateOverview:input_type -> mpi.v1.UpdateOverviewRequest
+	12, // 32: mpi.v1.FileService.GetFile:input_type -> mpi.v1.GetFileRequest
+	16, // 33: mpi.v1.FileService.UpdateFile:input_type -> mpi.v1.UpdateFileRequest
+	12, // 34: mpi.v1.FileService.GetFileStream:input_type -> mpi.v1.GetFileRequest
+	1,  // 35: mpi.v1.FileService.UpdateFileStream:input_type -> mpi.v1.FileDataChunk
+	5,  // 36: mpi.v1.FileService.GetOverview:output_type -> mpi.v1.GetOverviewResponse
+	7,  // 37: mpi.v1.FileService.UpdateOverview:output_type -> mpi.v1.UpdateOverviewResponse
+	13, // 38: mpi.v1.FileService.GetFile:output_type -> mpi.v1.GetFileResponse
+	17, // 39: mpi.v1.FileService.UpdateFile:output_type -> mpi.v1.UpdateFileResponse
+	1,  // 40: mpi.v1.FileService.GetFileStream:output_type -> mpi.v1.FileDataChunk
+	17, // 41: mpi.v1.FileService.UpdateFileStream:output_type -> mpi.v1.UpdateFileResponse
+	36, // [36:42] is the sub-list for method output_type
+	30, // [30:36] is the sub-list for method input_type
+	30, // [30:30] is the sub-list for extension type_name
+	30, // [30:30] is the sub-list for extension extendee
+	0,  // [0:30] is the sub-list for field type_name
 }
 
 func init() { file_mpi_v1_files_proto_init() }
@@ -1735,7 +1795,8 @@ func file_mpi_v1_files_proto_init() {
 		(*FileDataChunk_Header)(nil),
 		(*FileDataChunk_Content)(nil),
 	}
-	file_mpi_v1_files_proto_msgTypes[13].OneofWrappers = []any{
+	file_mpi_v1_files_proto_msgTypes[9].OneofWrappers = []any{}
+	file_mpi_v1_files_proto_msgTypes[14].OneofWrappers = []any{
 		(*FileMeta_CertificateMeta)(nil),
 	}
 	type x struct{}
@@ -1744,7 +1805,7 @@ func file_mpi_v1_files_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: unsafe.Slice(unsafe.StringData(file_mpi_v1_files_proto_rawDesc), len(file_mpi_v1_files_proto_rawDesc)),
 			NumEnums:      1,
-			NumMessages:   21,
+			NumMessages:   22,
 			NumExtensions: 0,
 			NumServices:   1,
 		},
diff --git a/api/grpc/mpi/v1/files.pb.validate.go b/api/grpc/mpi/v1/files.pb.validate.go
index a54f2b32b..12f295922 100644
--- a/api/grpc/mpi/v1/files.pb.validate.go
+++ b/api/grpc/mpi/v1/files.pb.validate.go
@@ -1394,6 +1394,39 @@ func (m *File) validate(all bool) error {
 
 	// no validation rules for Unmanaged
 
+	if m.ExternalDataSource != nil {
+
+		if all {
+			switch v := interface{}(m.GetExternalDataSource()).(type) {
+			case interface{ ValidateAll() error }:
+				if err := v.ValidateAll(); err != nil {
+					errors = append(errors, FileValidationError{
+						field:  "ExternalDataSource",
+						reason: "embedded message failed validation",
+						cause:  err,
+					})
+				}
+			case interface{ Validate() error }:
+				if err := v.Validate(); err != nil {
+					errors = append(errors, FileValidationError{
+						field:  "ExternalDataSource",
+						reason: "embedded message failed validation",
+						cause:  err,
+					})
+				}
+			}
+		} else if v, ok := interface{}(m.GetExternalDataSource()).(interface{ Validate() error }); ok {
+			if err := v.Validate(); err != nil {
+				return FileValidationError{
+					field:  "ExternalDataSource",
+					reason: "embedded message failed validation",
+					cause:  err,
+				}
+			}
+		}
+
+	}
+
 	if len(errors) > 0 {
 		return FileMultiError(errors)
 	}
@@ -1471,6 +1504,110 @@ var _ interface {
 	ErrorName() string
 } = FileValidationError{}
 
+// Validate checks the field values on ExternalDataSource with the rules
+// defined in the proto definition for this message. If any rules are
+// violated, the first error encountered is returned, or nil if there are no violations.
+func (m *ExternalDataSource) Validate() error {
+	return m.validate(false)
+}
+
+// ValidateAll checks the field values on ExternalDataSource with the rules
+// defined in the proto definition for this message. If any rules are
+// violated, the result is a list of violation errors wrapped in
+// ExternalDataSourceMultiError, or nil if none found.
+func (m *ExternalDataSource) ValidateAll() error {
+	return m.validate(true)
+}
+
+func (m *ExternalDataSource) validate(all bool) error {
+	if m == nil {
+		return nil
+	}
+
+	var errors []error
+
+	// no validation rules for Location
+
+	if len(errors) > 0 {
+		return ExternalDataSourceMultiError(errors)
+	}
+
+	return nil
+}
+
+// ExternalDataSourceMultiError is an error wrapping multiple validation errors
+// returned by ExternalDataSource.ValidateAll() if the designated constraints
+// aren't met.
+type ExternalDataSourceMultiError []error
+
+// Error returns a concatenation of all the error messages it wraps.
+func (m ExternalDataSourceMultiError) Error() string {
+	msgs := make([]string, 0, len(m))
+	for _, err := range m {
+		msgs = append(msgs, err.Error())
+	}
+	return strings.Join(msgs, "; ")
+}
+
+// AllErrors returns a list of validation violation errors.
+func (m ExternalDataSourceMultiError) AllErrors() []error { return m }
+
+// ExternalDataSourceValidationError is the validation error returned by
+// ExternalDataSource.Validate if the designated constraints aren't met.
+type ExternalDataSourceValidationError struct {
+	field  string
+	reason string
+	cause  error
+	key    bool
+}
+
+// Field function returns field value.
+func (e ExternalDataSourceValidationError) Field() string { return e.field }
+
+// Reason function returns reason value.
+func (e ExternalDataSourceValidationError) Reason() string { return e.reason }
+
+// Cause function returns cause value.
+func (e ExternalDataSourceValidationError) Cause() error { return e.cause }
+
+// Key function returns key value.
+func (e ExternalDataSourceValidationError) Key() bool { return e.key }
+
+// ErrorName returns error name.
+func (e ExternalDataSourceValidationError) ErrorName() string {
+	return "ExternalDataSourceValidationError"
+}
+
+// Error satisfies the builtin error interface
+func (e ExternalDataSourceValidationError) Error() string {
+	cause := ""
+	if e.cause != nil {
+		cause = fmt.Sprintf(" | caused by: %v", e.cause)
+	}
+
+	key := ""
+	if e.key {
+		key = "key for "
+	}
+
+	return fmt.Sprintf(
+		"invalid %sExternalDataSource.%s: %s%s",
+		key,
+		e.field,
+		e.reason,
+		cause)
+}
+
+var _ error = ExternalDataSourceValidationError{}
+
+var _ interface {
+	Field() string
+	Reason() string
+	Key() bool
+	Cause() error
+	ErrorName() string
+} = ExternalDataSourceValidationError{}
+
 // Validate checks the field values on GetFileRequest with the rules defined in
 // the proto definition for this message. If any rules are violated, the first
 // error encountered is returned, or nil if there are no violations.
diff --git a/api/grpc/mpi/v1/files.proto b/api/grpc/mpi/v1/files.proto
index 8af9a60bf..c6e0ebe56 100644
--- a/api/grpc/mpi/v1/files.proto
+++ b/api/grpc/mpi/v1/files.proto
@@ -130,6 +130,13 @@ message File {
     FileMeta file_meta = 1;
     // Unmanaged files will not be modified
     bool unmanaged = 2;
+    // external file source
+    optional ExternalDataSource external_data_source = 3;
+}
+
+message ExternalDataSource {
+    // URL to the location of an external file
+    string location = 1;
 }
 
 // Represents the get file request
diff --git a/docs/proto/protos.md b/docs/proto/protos.md
index 874107b5b..3ae57f5e4 100644
--- a/docs/proto/protos.md
+++ b/docs/proto/protos.md
@@ -18,6 +18,7 @@
     - [CertificateDates](#mpi-v1-CertificateDates)
     - [CertificateMeta](#mpi-v1-CertificateMeta)
     - [ConfigVersion](#mpi-v1-ConfigVersion)
+    - [ExternalDataSource](#mpi-v1-ExternalDataSource)
     - [File](#mpi-v1-File)
     - [FileContents](#mpi-v1-FileContents)
     - [FileDataChunk](#mpi-v1-FileDataChunk)
@@ -295,6 +296,21 @@ Represents a specific configuration version associated with an instance
 
 
 
+<a name="mpi-v1-ExternalDataSource"></a>
+
+### ExternalDataSource
+
+
+
+| Field | Type | Label | Description |
+| ----- | ---- | ----- | ----------- |
+| location | [string](#string) |  | URL to the location of an external file |
+
+
+
+
+
+
 <a name="mpi-v1-File"></a>
 
 ### File
@@ -305,6 +321,7 @@ Represents meta data about a file
 | ----- | ---- | ----- | ----------- |
 | file_meta | [FileMeta](#mpi-v1-FileMeta) |  | Meta information about the file, the name (including path) and hash |
 | unmanaged | [bool](#bool) |  | Unmanaged files will not be modified |
+| external_data_source | [ExternalDataSource](#mpi-v1-ExternalDataSource) | optional | external file source |
 
 
 
diff --git a/test/mock/grpc/README.md b/test/mock/grpc/README.md
index cb10c1c92..dae3cdcd7 100644
--- a/test/mock/grpc/README.md
+++ b/test/mock/grpc/README.md
@@ -413,7 +413,6 @@ Example request body to get stream upstreams example:
     }
 }
 ```
-
 ## POST /api/v1/instance/\<instance id\>/config/apply
 Used to send management plane config apply request over the Subscribe rpc stream to the NGINX Agent for a particular data plane instance.
 
@@ -425,3 +424,73 @@ So the full path to the file used by the mock management plane would be `/tmp/co
 
 Simply edit this file and then perform a POST request against the `/api/v1/instance/<instance id>/config/apply` endpoint to execute a config apply request.
 
+We can also send a JSON body with this POST request to point to a configuration file located on an external server.
+
+```
+POST /api/v1/instance/\<instance id\>/config/apply -H "Content-Type:application/json" -d
+{
+  "externalDataSources": [
+    {
+      "filePath": "/path/to/my/file.txt",
+      "location": "s3://my-bucket/data/"
+    },
+    {
+      "filePath": "/etc/nginx/secret.pem",
+      "location": "http://localhost:9092/external/secret.pem"
+    }
+  ]
+}
+```
+
+## GET /api/v1/externalfile/\<filename>
+
+Used to get files from a directory which can be used to mock an external file server.
+
+For example if we set the external file server as the location where our nginx-agent.conf file is located.
+
+Updated the Makefile:
+
+MOCK_MANAGEMENT_PLANE_EXTERNAL_FILE_SERVER ?= /Users/<user>/go/src/github.com/nginx/agent/
+
+Sample API request:
+GET /api/v1/externalfile/nginx-agent.conf 
+
+Response:
+```
+#
+# /etc/nginx-agent/nginx-agent.conf
+#
+# Configuration file for NGINX Agent.
+#
+
+log:
+  # set log level (error, warn, info, debug; default "info")
+  level: info
+  # set log path. if empty, don't log to file.
+  path: /var/log/nginx-agent/
+
+allowed_directories: 
+    - /etc/nginx
+    - /etc/app_protect
+    - /usr/local/etc/nginx
+    - /usr/share/nginx/modules
+    - /var/run/nginx
+    - /var/log/nginx
+#
+# Command server settings to connect to a management plane server
+#
+#command:
+#  server:
+#    host: "agent.connect.nginx.com"
+#    port: 443
+#  auth:
+#    token: ""
+#  tls:
+#    skip_verify: false
+command:
+  server:
+    host: localhost
+    port: 9091
+
+```
+
diff --git a/test/mock/grpc/mock_management_command_service.go b/test/mock/grpc/mock_management_command_service.go
index 5f2115405..f3dbc4d0f 100644
--- a/test/mock/grpc/mock_management_command_service.go
+++ b/test/mock/grpc/mock_management_command_service.go
@@ -9,6 +9,7 @@ import (
 	"context"
 	"encoding/json"
 	"errors"
+	"fmt"
 	"io"
 	"log/slog"
 	"net"
@@ -54,7 +55,8 @@ func init() {
 func NewCommandService(
 	requestChan chan *mpi.ManagementPlaneRequest,
 	configDirectory string,
-	externalFileServer string) *CommandService {
+	externalFileServer string,
+) *CommandService {
 	cs := &CommandService{
 		requestChan:                requestChan,
 		connectionMutex:            sync.Mutex{},
@@ -80,6 +82,17 @@ func NewCommandService(
 	return cs
 }
 
+// Adding a struct to represent the external data source.
+type ExternalDataSource struct {
+	FilePath string `json:"filePath"`
+	Location string `json:"location"`
+}
+
+// Adding a struct for the request body of the config apply endpoint.
+type ConfigApplyRequestBody struct {
+	ExternalDataSources []*ExternalDataSource `json:"externalDataSources"`
+}
+
 func (cs *CommandService) StartServer(listener net.Listener) {
 	slog.Info("Starting mock management plane http server", "address", listener.Addr().String())
 	err := cs.server.RunListener(listener)
@@ -365,7 +378,15 @@ func (cs *CommandService) addConfigApplyEndpoint() {
 			return
 		}
 
-		cs.instanceFiles[instanceID] = configFiles
+		updatedConfigFiles, externalFilesWereUpdated, err := processConfigApplyRequestBody(c, configFiles)
+		if err != nil {
+			c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+			return
+		}
+
+		if externalFilesWereUpdated {
+			cs.instanceFiles[instanceID] = updatedConfigFiles
+		}
 
 		request := mpi.ManagementPlaneRequest{
 			MessageMeta: &mpi.MessageMeta{
@@ -495,3 +516,33 @@ func createFile(fullPath, filePath string) (*mpi.File, error) {
 func isValidFile(info os.FileInfo, fileFullPath string) bool {
 	return !info.IsDir() && !strings.HasSuffix(fileFullPath, ".DS_Store")
 }
+
+func processConfigApplyRequestBody(c *gin.Context, initialFiles []*mpi.File) ([]*mpi.File, bool, error) {
+	if c.Request.ContentLength == 0 {
+		return initialFiles, false, nil
+	}
+
+	var body ConfigApplyRequestBody
+	if bindErr := c.BindJSON(&body); bindErr != nil {
+		return initialFiles, false, fmt.Errorf("invalid request body: %w", bindErr)
+	}
+
+	filesMap := make(map[string]*mpi.File)
+	for _, file := range initialFiles {
+		if file.GetFileMeta() != nil {
+			filesMap[file.GetFileMeta().GetName()] = file
+		}
+	}
+
+	var externalFilesWereUpdated bool
+	for _, ed := range body.ExternalDataSources {
+		if file, ok := filesMap[ed.FilePath]; ok {
+			file.ExternalDataSource = &mpi.ExternalDataSource{
+				Location: ed.Location,
+			}
+			externalFilesWereUpdated = true
+		}
+	}
+
+	return initialFiles, externalFilesWereUpdated, nil
+}
diff --git a/test/mock/grpc/mock_management_server.go b/test/mock/grpc/mock_management_server.go
index 233c2b18e..93bb5ae9f 100644
--- a/test/mock/grpc/mock_management_server.go
+++ b/test/mock/grpc/mock_management_server.go
@@ -18,7 +18,7 @@ import (
 	"syscall"
 	"time"
 
-	v1 "github.com/nginx/agent/v3/api/grpc/mpi/v1"
+	"github.com/nginx/agent/v3/api/grpc/mpi/v1"
 	"github.com/nginx/agent/v3/internal/config"
 
 	"github.com/bufbuild/protovalidate-go"

From a3c1df4da46b9d125a25ac329284a7a259e6d39d Mon Sep 17 00:00:00 2001
From: Akshay Chawla <50681751+Akshay2191@users.noreply.github.com>
Date: Mon, 1 Sep 2025 11:14:56 +0100
Subject: [PATCH 3/6] Fix traversal attack

Adding validation to the user defined file path for external file server to stop possible  traversal attacks.

Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>
---
 .../grpc/mock_management_command_service.go   | 24 ++++++++++++++++---
 1 file changed, 21 insertions(+), 3 deletions(-)

diff --git a/test/mock/grpc/mock_management_command_service.go b/test/mock/grpc/mock_management_command_service.go
index f3dbc4d0f..f64734a9f 100644
--- a/test/mock/grpc/mock_management_command_service.go
+++ b/test/mock/grpc/mock_management_command_service.go
@@ -441,17 +441,35 @@ func (cs *CommandService) addExternalFileServerEndpoint() {
 	// This API will serve individual files from the external directory
 	cs.server.GET("/api/v1/externalfile/:filename", func(c *gin.Context) {
 		filename := c.Param("filename")
+		// Validate that the filename does not contain path separators or ".."
+		if strings.Contains(filename, "/") || strings.Contains(filename, "\\") || strings.Contains(filename, "..") {
+			c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid file name"})
+			return
+		}
 		filePath := filepath.Join(cs.externalFileServer, filename)
+		absBase, err := filepath.Abs(cs.externalFileServer)
+		if err != nil {
+			c.JSON(http.StatusInternalServerError, gin.H{"error": "Internal error"})
+			return
+		}
+		absFile, err := filepath.Abs(filePath)
+		if err != nil {
+			c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid file name"})
+			return
+		}
+		if !strings.HasPrefix(absFile, absBase) {
+			c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid file name"})
+			return
+		}
 
 		// Check if the file exists
-		if _, err := os.Stat(filePath); os.IsNotExist(err) {
+		if _, err := os.Stat(absFile); os.IsNotExist(err) {
 			c.JSON(http.StatusNotFound, gin.H{"error": "File not found"})
-
 			return
 		}
 
 		// Serve the file
-		c.File(filePath)
+		c.File(absFile)
 	})
 
 	slog.Info("Serving individual external files from", "directory", cs.externalFileServer)

From d49a8514a56b458288d067f86b410f465070ed62 Mon Sep 17 00:00:00 2001
From: Akshay Chawla <ak.chawla@f5.com>
Date: Mon, 1 Sep 2025 11:56:01 +0100
Subject: [PATCH 4/6] fixing lint error

---
 test/mock/grpc/mock_management_command_service.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/test/mock/grpc/mock_management_command_service.go b/test/mock/grpc/mock_management_command_service.go
index f64734a9f..ac527033d 100644
--- a/test/mock/grpc/mock_management_command_service.go
+++ b/test/mock/grpc/mock_management_command_service.go
@@ -463,7 +463,7 @@ func (cs *CommandService) addExternalFileServerEndpoint() {
 		}
 
 		// Check if the file exists
-		if _, err := os.Stat(absFile); os.IsNotExist(err) {
+		if _, file_err := os.Stat(absFile); os.IsNotExist(file_err) {
 			c.JSON(http.StatusNotFound, gin.H{"error": "File not found"})
 			return
 		}

From 1803f90cf687fe52a4a79c0af0ebe5147535bf7e Mon Sep 17 00:00:00 2001
From: Akshay Chawla <ak.chawla@f5.com>
Date: Tue, 9 Sep 2025 11:45:03 +0100
Subject: [PATCH 5/6] fixing integration test

---
 test/mock/grpc/mock_management_command_service.go | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/test/mock/grpc/mock_management_command_service.go b/test/mock/grpc/mock_management_command_service.go
index ac527033d..98211b705 100644
--- a/test/mock/grpc/mock_management_command_service.go
+++ b/test/mock/grpc/mock_management_command_service.go
@@ -386,6 +386,8 @@ func (cs *CommandService) addConfigApplyEndpoint() {
 
 		if externalFilesWereUpdated {
 			cs.instanceFiles[instanceID] = updatedConfigFiles
+		} else {
+			cs.instanceFiles[instanceID] = configFiles
 		}
 
 		request := mpi.ManagementPlaneRequest{

From a97988cf58af6591b8690d2d82afaa9d2d51baea Mon Sep 17 00:00:00 2001
From: Akshay Chawla <ak.chawla@f5.com>
Date: Wed, 10 Sep 2025 10:08:02 +0100
Subject: [PATCH 6/6] worked on PR review comments

---
 api/grpc/mpi/v1/command.pb.go                 |  2 +-
 api/grpc/mpi/v1/common.pb.go                  |  2 +-
 api/grpc/mpi/v1/files.pb.go                   |  2 +-
 test/mock/grpc/cmd/main.go                    |  3 +-
 .../grpc/mock_management_command_service.go   | 80 ++++++++++++-------
 5 files changed, 56 insertions(+), 33 deletions(-)

diff --git a/api/grpc/mpi/v1/command.pb.go b/api/grpc/mpi/v1/command.pb.go
index 39ef93489..b5f0346f4 100644
--- a/api/grpc/mpi/v1/command.pb.go
+++ b/api/grpc/mpi/v1/command.pb.go
@@ -8,7 +8,7 @@
 
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.36.8
+// 	protoc-gen-go v1.36.9
 // 	protoc        (unknown)
 // source: mpi/v1/command.proto
 
diff --git a/api/grpc/mpi/v1/common.pb.go b/api/grpc/mpi/v1/common.pb.go
index 890c2b073..e6d06cf37 100644
--- a/api/grpc/mpi/v1/common.pb.go
+++ b/api/grpc/mpi/v1/common.pb.go
@@ -5,7 +5,7 @@
 
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.36.8
+// 	protoc-gen-go v1.36.9
 // 	protoc        (unknown)
 // source: mpi/v1/common.proto
 
diff --git a/api/grpc/mpi/v1/files.pb.go b/api/grpc/mpi/v1/files.pb.go
index 4fe57bb7c..47d1362b7 100644
--- a/api/grpc/mpi/v1/files.pb.go
+++ b/api/grpc/mpi/v1/files.pb.go
@@ -5,7 +5,7 @@
 
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.36.8
+// 	protoc-gen-go v1.36.9
 // 	protoc        (unknown)
 // source: mpi/v1/files.proto
 
diff --git a/test/mock/grpc/cmd/main.go b/test/mock/grpc/cmd/main.go
index a50f034ac..06f6ff732 100644
--- a/test/mock/grpc/cmd/main.go
+++ b/test/mock/grpc/cmd/main.go
@@ -79,7 +79,7 @@ func main() {
 		defaultExternalFileServer, externalFileServerErr := generateDefaultExternalFileSevrevDirectory()
 		externalFileServer = &defaultExternalFileServer
 		if externalFileServerErr != nil {
-			slog.ErrorContext(ctx, "Failed to create default config directory", "error", err)
+			slog.ErrorContext(ctx, "Failed to create external file server directory", "error", err)
 			os.Exit(1)
 		}
 	}
@@ -117,7 +117,6 @@ func generateDefaultExternalFileSevrevDirectory() (string, error) {
 
 	err := os.MkdirAll(externalFileServer, directoryPermissions)
 	if err != nil {
-		slog.Error("Failed to create external file server directory", "error", err)
 		return "", err
 	}
 
diff --git a/test/mock/grpc/mock_management_command_service.go b/test/mock/grpc/mock_management_command_service.go
index 98211b705..f68c4c7cd 100644
--- a/test/mock/grpc/mock_management_command_service.go
+++ b/test/mock/grpc/mock_management_command_service.go
@@ -378,13 +378,13 @@ func (cs *CommandService) addConfigApplyEndpoint() {
 			return
 		}
 
-		updatedConfigFiles, externalFilesWereUpdated, err := processConfigApplyRequestBody(c, configFiles)
+		updatedConfigFiles, externalFilesUpdated, err := processConfigApplyRequestBody(c, configFiles)
 		if err != nil {
 			c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
 			return
 		}
 
-		if externalFilesWereUpdated {
+		if externalFilesUpdated {
 			cs.instanceFiles[instanceID] = updatedConfigFiles
 		} else {
 			cs.instanceFiles[instanceID] = configFiles
@@ -443,38 +443,22 @@ func (cs *CommandService) addExternalFileServerEndpoint() {
 	// This API will serve individual files from the external directory
 	cs.server.GET("/api/v1/externalfile/:filename", func(c *gin.Context) {
 		filename := c.Param("filename")
-		// Validate that the filename does not contain path separators or ".."
-		if strings.Contains(filename, "/") || strings.Contains(filename, "\\") || strings.Contains(filename, "..") {
-			c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid file name"})
-			return
-		}
-		filePath := filepath.Join(cs.externalFileServer, filename)
-		absBase, err := filepath.Abs(cs.externalFileServer)
-		if err != nil {
-			c.JSON(http.StatusInternalServerError, gin.H{"error": "Internal error"})
-			return
-		}
-		absFile, err := filepath.Abs(filePath)
+
+		absFile, err := validateFile(cs.externalFileServer, filename)
 		if err != nil {
-			c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid file name"})
-			return
-		}
-		if !strings.HasPrefix(absFile, absBase) {
-			c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid file name"})
-			return
-		}
+			if errors.Is(err, os.ErrNotExist) {
+				c.JSON(http.StatusNotFound, gin.H{"error": "File not found"})
+			} else {
+				c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+			}
 
-		// Check if the file exists
-		if _, file_err := os.Stat(absFile); os.IsNotExist(file_err) {
-			c.JSON(http.StatusNotFound, gin.H{"error": "File not found"})
 			return
 		}
-
 		// Serve the file
 		c.File(absFile)
 	})
 
-	slog.Info("Serving individual external files from", "directory", cs.externalFileServer)
+	slog.Info("Serving individual external files from", "external_file_server", cs.externalFileServer)
 }
 
 func (cs *CommandService) findInstanceConfigFiles(instanceID string) (configFiles []*mpi.File, err error) {
@@ -537,6 +521,34 @@ func isValidFile(info os.FileInfo, fileFullPath string) bool {
 	return !info.IsDir() && !strings.HasSuffix(fileFullPath, ".DS_Store")
 }
 
+func validateFile(externalFileServer, filename string) (string, error) {
+	if strings.Contains(filename, "/") || strings.Contains(filename, "\\") || strings.Contains(filename, "..") {
+		return "", errors.New("invalid file name")
+	}
+
+	filePath := filepath.Join(externalFileServer, filename)
+
+	absBase, err := filepath.Abs(externalFileServer)
+	if err != nil {
+		return "", fmt.Errorf("internal error: %w", err)
+	}
+
+	absFile, err := filepath.Abs(filePath)
+	if err != nil {
+		return "", fmt.Errorf("invalid file name: %w", err)
+	}
+
+	if !strings.HasPrefix(absFile, absBase) {
+		return "", errors.New("invalid file name")
+	}
+
+	if _, fileErr := os.Stat(absFile); os.IsNotExist(fileErr) {
+		return "", os.ErrNotExist
+	}
+
+	return absFile, nil
+}
+
 func processConfigApplyRequestBody(c *gin.Context, initialFiles []*mpi.File) ([]*mpi.File, bool, error) {
 	if c.Request.ContentLength == 0 {
 		return initialFiles, false, nil
@@ -555,14 +567,26 @@ func processConfigApplyRequestBody(c *gin.Context, initialFiles []*mpi.File) ([]
 	}
 
 	var externalFilesWereUpdated bool
+	updatedFiles := initialFiles
+
 	for _, ed := range body.ExternalDataSources {
 		if file, ok := filesMap[ed.FilePath]; ok {
 			file.ExternalDataSource = &mpi.ExternalDataSource{
 				Location: ed.Location,
 			}
-			externalFilesWereUpdated = true
+		} else {
+			newFile := &mpi.File{
+				FileMeta: &mpi.FileMeta{
+					Name: ed.FilePath,
+				},
+				ExternalDataSource: &mpi.ExternalDataSource{
+					Location: ed.Location,
+				},
+			}
+			updatedFiles = append(updatedFiles, newFile)
 		}
+		externalFilesWereUpdated = true
 	}
 
-	return initialFiles, externalFilesWereUpdated, nil
+	return updatedFiles, externalFilesWereUpdated, nil
 }