rw_core/test/utils.go - voltha-go - Gitiles

 /*
  * Copyright 2020-2023 Open Networking Foundation (ONF) and the ONF Contributors
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  * http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 // Package core Common Logger initialization
 package test

 import (
 	"bufio"
 	"context"
 	"encoding/json"
 	"fmt"
 	"os"
 	"path/filepath"
 	"strings"
 	"testing"
 	"time"

 	ca "github.com/opencord/voltha-protos/v5/go/core_adapter"

 	"math/rand"

 	"github.com/opencord/voltha-go/rw_core/config"
 	cm "github.com/opencord/voltha-go/rw_core/mocks"
 	"github.com/opencord/voltha-lib-go/v7/pkg/db/kvstore"
 	"github.com/opencord/voltha-lib-go/v7/pkg/log"
 	mock_etcd "github.com/opencord/voltha-lib-go/v7/pkg/mocks/etcd"
 	"github.com/opencord/voltha-lib-go/v7/pkg/version"
 	"github.com/opencord/voltha-protos/v5/go/voltha"
 	"github.com/phayes/freeport"
 	"github.com/stretchr/testify/assert"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"
 )

 const (
 	OltAdapter = iota
 	OnuAdapter
 )

 type AdapterInfo struct {
 	TotalReplica    int32
 	Vendor          string
 	DeviceType      string
 	ChildDeviceType string
 	ChildVendor     string
 }

 // prettyPrintDeviceUpdateLog is used just for debugging and exploring the Core logs
 func prettyPrintDeviceUpdateLog(inputFile string, deviceID string) {
 	file, err := os.Open(filepath.Clean(inputFile))
 	if err != nil {
 		logger.Fatal(context.Background(), err)
 	}
 	defer func() {
 		if err := file.Close(); err != nil {
 			logger.Errorw(context.Background(), "file-close-error", log.Fields{"error": err})
 		}
 	}()

 	var logEntry struct {
 		Level       string `json:"level"`
 		Ts          string `json:"ts"`
 		Caller      string `json:"caller"`
 		Msg         string `json:"msg"`
 		RPC         string `json:"rpc"`
 		DeviceID    string `json:"device-id"`
 		RequestedBy string `json:"requested-by"`
 		StateChange string `json:"state-change"`
 		Status      string `json:"status"`
 		Description string `json:"description"`
 	}

 	scanner := bufio.NewScanner(file)
 	fmt.Println("Timestamp\t\t\tDeviceId\t\t\t\tStatus\t\t\tRPC\t\t\tRequestedBy\t\t\tStateChange\t\t\tDescription")
 	for scanner.Scan() {
 		input := scanner.Text()
 		// Look for device update logs only
 		if !strings.Contains(input, "device-operation") || !strings.Contains(input, "requested-by") {
 			continue
 		}
 		// Check if deviceID is required
 		if deviceID != "" {
 			if !strings.Contains(input, deviceID) {
 				continue
 			}
 		}
 		if err := json.Unmarshal([]byte(input), &logEntry); err != nil {
 			logger.Fatal(context.Background(), err)
 		}
 		fmt.Println(
 			fmt.Sprintf(
 				"%s\t%s\t%s\t%-30.30q\t%-16.16s\t%-25.25s\t%s",
 				logEntry.Ts,
 				logEntry.DeviceID,
 				logEntry.Status,
 				logEntry.RPC,
 				logEntry.RequestedBy,
 				logEntry.StateChange,
 				logEntry.Description))
 	}
 }

 func omciLog(inputFile string, deviceID string) {
 	file, err := os.Open(filepath.Clean(inputFile))
 	if err != nil {
 		logger.Fatal(context.Background(), err)
 	}
 	defer func() {
 		if err := file.Close(); err != nil {
 			logger.Errorw(context.Background(), "file-close-error", log.Fields{"error": err})
 		}
 	}()

 	var logEntry struct {
 		Level         string `json:"level"`
 		Ts            string `json:"ts"`
 		Caller        string `json:"caller"`
 		Msg           string `json:"msg"`
 		InstanceID    string `json:"instanceId"`
 		ChildDeviceID string `json:"child-device-id"`
 		OmciMsg       string `json:"omciMsg"`
 		IntfID        string `json:"intf-id"`
 		OnuID         string `json:"onu-id"`
 		OmciTrns      int    `json:"omciTransactionID"`
 	}

 	scanner := bufio.NewScanner(file)
 	uniqueTnsIDs := map[int]int{}
 	for scanner.Scan() {
 		input := scanner.Text()
 		// Look for device update logs only
 		if !strings.Contains(input, "sent-omci-msg") {
 			continue
 		}
 		// Check if deviceID is required
 		if deviceID != "" {
 			if !strings.Contains(input, deviceID) {
 				continue
 			}
 		}
 		if err := json.Unmarshal([]byte(input), &logEntry); err != nil {
 			logger.Fatal(context.Background(), err)
 		}
 		uniqueTnsIDs[logEntry.OmciTrns]++
 	}
 	repeatedTrnsID := []int{}
 	for k, v := range uniqueTnsIDs {
 		if v != 1 {
 			repeatedTrnsID = append(repeatedTrnsID, k)
 		}
 	}
 	fmt.Println("RepeatedIDs", repeatedTrnsID, "TransID:", len(uniqueTnsIDs))
 }

 //CreateMockAdapter creates mock OLT and ONU adapters - this will automatically the grpc service hosted by that
 // adapter
 func CreateMockAdapter(
 	ctx context.Context,
 	adapterType int,
 	coreEndpoint string,
 	deviceType string,
 	vendor string,
 	childDeviceType string,
 	childVendor string,
 ) (interface{}, error) {

 	var adpt interface{}
 	switch adapterType {
 	case OltAdapter:
 		adpt = cm.NewOLTAdapter(ctx, coreEndpoint, deviceType, vendor, childDeviceType, childVendor)
 	case OnuAdapter:
 		adpt = cm.NewONUAdapter(ctx, coreEndpoint, deviceType, vendor)
 	default:
 		logger.Fatalf(ctx, "invalid-adapter-type-%d", adapterType)
 	}
 	return adpt, nil
 }

 //CreateAndRegisterAdapters creates mock ONU and OLT adapters and registers them to rw-core
 func CreateAndRegisterAdapters(
 	ctx context.Context,
 	t *testing.T,
 	oltAdapters map[string]*AdapterInfo,
 	onuAdapters map[string]*AdapterInfo,
 	coreEndpoint string,
 ) (map[string][]*cm.OLTAdapter, map[string][]*cm.ONUAdapter) {
 	// Setup the ONU adapter first in this unit test environment.  This makes it easier to test whether the
 	// Core is ready to send grpc requests to the adapters.  The unit test uses grpc to communicate with the
 	// Core and as such it does not have inside knowledge when the adapters are ready.

 	// Setup the ONU Adapters
 	onuAdaptersMap := make(map[string][]*cm.ONUAdapter)
 	for adapterType, adapterInfo := range onuAdapters {
 		for replica := int32(1); replica <= adapterInfo.TotalReplica; replica++ {
 			adpt, err := CreateMockAdapter(ctx, OnuAdapter, coreEndpoint, adapterInfo.DeviceType, adapterInfo.Vendor, adapterInfo.ChildDeviceType, adapterInfo.ChildVendor)
 			assert.Nil(t, err)
 			onuAdapter, ok := adpt.(*cm.ONUAdapter)
 			assert.True(t, ok)
 			assert.NotNil(t, onuAdapter)
 			//	Register the adapter
 			adapterID := fmt.Sprintf("%s-%d", adapterType, replica)
 			adapterToRegister := &voltha.Adapter{
 				Id:             adapterID,
 				Vendor:         adapterInfo.Vendor,
 				Version:        version.VersionInfo.Version,
 				Type:           adapterType,
 				CurrentReplica: replica,
 				TotalReplicas:  adapterInfo.TotalReplica,
 				Endpoint:       onuAdapter.GetEndPoint(),
 			}
 			types := []*voltha.DeviceType{{Id: adapterInfo.DeviceType, AdapterType: adapterType, AcceptsAddRemoveFlowUpdates: true}}
 			deviceTypes := &voltha.DeviceTypes{Items: types}
 			coreClient, err := onuAdapter.GetCoreClient()
 			assert.Nil(t, err)
 			assert.NotNil(t, coreClient)
 			if _, err := coreClient.RegisterAdapter(ctx, &ca.AdapterRegistration{
 				Adapter: adapterToRegister,
 				DTypes:  deviceTypes}); err != nil {
 				logger.Errorw(ctx, "failed-to-register-adapter", log.Fields{"error": err, "adapter": adapterToRegister.Id})
 				assert.NotNil(t, err)
 			}
 			if _, ok := onuAdaptersMap[adapterType]; !ok {
 				onuAdaptersMap[adapterType] = []*cm.ONUAdapter{}
 			}
 			onuAdaptersMap[adapterType] = append(onuAdaptersMap[adapterType], onuAdapter)
 		}
 	}

 	// Setup the OLT Adapters
 	oltAdaptersMap := make(map[string][]*cm.OLTAdapter)
 	for adapterType, adapterInfo := range oltAdapters {
 		for replica := int32(1); replica <= adapterInfo.TotalReplica; replica++ {
 			adpt, err := CreateMockAdapter(ctx, OltAdapter, coreEndpoint, adapterInfo.DeviceType, adapterInfo.Vendor, adapterInfo.ChildDeviceType, adapterInfo.ChildVendor)
 			assert.Nil(t, err)
 			oltAdapter, ok := adpt.(*cm.OLTAdapter)
 			assert.True(t, ok)
 			assert.NotNil(t, oltAdapter)

 			//	Register the adapter
 			adapterID := fmt.Sprintf("%s-%d", adapterType, replica)
 			adapterToRegister := &voltha.Adapter{
 				Id:             adapterID,
 				Vendor:         adapterInfo.Vendor,
 				Version:        version.VersionInfo.Version,
 				Type:           adapterType,
 				CurrentReplica: replica,
 				TotalReplicas:  adapterInfo.TotalReplica,
 				Endpoint:       oltAdapter.GetEndPoint(),
 			}
 			types := []*voltha.DeviceType{{Id: adapterInfo.DeviceType, AdapterType: adapterType, AcceptsAddRemoveFlowUpdates: true}}
 			deviceTypes := &voltha.DeviceTypes{Items: types}
 			coreClient, err := oltAdapter.GetCoreClient()
 			assert.Nil(t, err)
 			assert.NotNil(t, coreClient)

 			if _, err := coreClient.RegisterAdapter(ctx, &ca.AdapterRegistration{
 				Adapter: adapterToRegister,
 				DTypes:  deviceTypes}); err != nil {
 				logger.Errorw(ctx, "failed-to-register-adapter", log.Fields{"error": err, "adapter": adapterToRegister.Id})
 				assert.NotNil(t, err)
 			}
 			if _, ok := oltAdaptersMap[adapterType]; !ok {
 				oltAdaptersMap[adapterType] = []*cm.OLTAdapter{}
 			}
 			oltAdaptersMap[adapterType] = append(oltAdaptersMap[adapterType], oltAdapter)
 		}
 	}

 	return oltAdaptersMap, onuAdaptersMap
 }

 //StartEmbeddedEtcdServer creates and starts an Embedded etcd server locally.
 func StartEmbeddedEtcdServer(ctx context.Context, configName, storageDir, logLevel string) (*mock_etcd.EtcdServer, int, error) {
 	kvClientPort, err := freeport.GetFreePort()
 	if err != nil {
 		return nil, 0, err
 	}
 	peerPort, err := freeport.GetFreePort()
 	if err != nil {
 		return nil, 0, err
 	}
 	etcdServer := mock_etcd.StartEtcdServer(ctx, mock_etcd.MKConfig(ctx, configName, kvClientPort, peerPort, storageDir, logLevel))
 	if etcdServer == nil {
 		return nil, 0, status.Error(codes.Internal, "Embedded server failed to start")
 	}
 	return etcdServer, kvClientPort, nil
 }

 //StopEmbeddedEtcdServer stops the embedded etcd server
 func StopEmbeddedEtcdServer(ctx context.Context, server *mock_etcd.EtcdServer) {
 	if server != nil {
 		server.Stop(ctx)
 	}
 }

 //SetupKVClient creates a new etcd client
 func SetupKVClient(ctx context.Context, cf *config.RWCoreFlags, coreInstanceID string) kvstore.Client {
 	client, err := kvstore.NewEtcdClient(ctx, cf.KVStoreAddress, cf.KVStoreTimeout, log.FatalLevel)
 	if err != nil {
 		panic("no kv client")
 	}
 	return client
 }

 //getRandomMacAddress returns a random mac address
 func getRandomMacAddress() string {
 	rand.Seed(time.Now().UnixNano() / int64(rand.Intn(255)+1))
 	return fmt.Sprintf("%02x:%02x:%02x:%02x:%02x:%02x",
 		rand.Intn(255),
 		rand.Intn(255),
 		rand.Intn(255),
 		rand.Intn(255),
 		rand.Intn(255),
 		rand.Intn(255),
 	)
 }
	/*
	* Copyright 2020-2023 Open Networking Foundation (ONF) and the ONF Contributors
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	// Package core Common Logger initialization
	package test

	import (
	"bufio"
	"context"
	"encoding/json"
	"fmt"
	"os"
	"path/filepath"
	"strings"
	"testing"
	"time"

	ca "github.com/opencord/voltha-protos/v5/go/core_adapter"

	"math/rand"

	"github.com/opencord/voltha-go/rw_core/config"
	cm "github.com/opencord/voltha-go/rw_core/mocks"
	"github.com/opencord/voltha-lib-go/v7/pkg/db/kvstore"
	"github.com/opencord/voltha-lib-go/v7/pkg/log"
	mock_etcd "github.com/opencord/voltha-lib-go/v7/pkg/mocks/etcd"
	"github.com/opencord/voltha-lib-go/v7/pkg/version"
	"github.com/opencord/voltha-protos/v5/go/voltha"
	"github.com/phayes/freeport"
	"github.com/stretchr/testify/assert"
	"google.golang.org/grpc/codes"
	"google.golang.org/grpc/status"
	)

	const (
	OltAdapter = iota
	OnuAdapter
	)

	type AdapterInfo struct {
	TotalReplica int32
	Vendor string
	DeviceType string
	ChildDeviceType string
	ChildVendor string
	}

	// prettyPrintDeviceUpdateLog is used just for debugging and exploring the Core logs
	func prettyPrintDeviceUpdateLog(inputFile string, deviceID string) {
	file, err := os.Open(filepath.Clean(inputFile))
	if err != nil {
	logger.Fatal(context.Background(), err)
	}
	defer func() {
	if err := file.Close(); err != nil {
	logger.Errorw(context.Background(), "file-close-error", log.Fields{"error": err})
	}
	}()

	var logEntry struct {
	Level string `json:"level"`
	Ts string `json:"ts"`
	Caller string `json:"caller"`
	Msg string `json:"msg"`
	RPC string `json:"rpc"`
	DeviceID string `json:"device-id"`
	RequestedBy string `json:"requested-by"`
	StateChange string `json:"state-change"`
	Status string `json:"status"`
	Description string `json:"description"`
	}

	scanner := bufio.NewScanner(file)
	fmt.Println("Timestamp\t\t\tDeviceId\t\t\t\tStatus\t\t\tRPC\t\t\tRequestedBy\t\t\tStateChange\t\t\tDescription")
	for scanner.Scan() {
	input := scanner.Text()
	// Look for device update logs only
	if !strings.Contains(input, "device-operation") \|\| !strings.Contains(input, "requested-by") {
	continue
	}
	// Check if deviceID is required
	if deviceID != "" {
	if !strings.Contains(input, deviceID) {
	continue
	}
	}
	if err := json.Unmarshal([]byte(input), &logEntry); err != nil {
	logger.Fatal(context.Background(), err)
	}
	fmt.Println(
	fmt.Sprintf(
	"%s\t%s\t%s\t%-30.30q\t%-16.16s\t%-25.25s\t%s",
	logEntry.Ts,
	logEntry.DeviceID,
	logEntry.Status,
	logEntry.RPC,
	logEntry.RequestedBy,
	logEntry.StateChange,
	logEntry.Description))
	}
	}

	func omciLog(inputFile string, deviceID string) {
	file, err := os.Open(filepath.Clean(inputFile))
	if err != nil {
	logger.Fatal(context.Background(), err)
	}
	defer func() {
	if err := file.Close(); err != nil {
	logger.Errorw(context.Background(), "file-close-error", log.Fields{"error": err})
	}
	}()

	var logEntry struct {
	Level string `json:"level"`
	Ts string `json:"ts"`
	Caller string `json:"caller"`
	Msg string `json:"msg"`
	InstanceID string `json:"instanceId"`
	ChildDeviceID string `json:"child-device-id"`
	OmciMsg string `json:"omciMsg"`
	IntfID string `json:"intf-id"`
	OnuID string `json:"onu-id"`
	OmciTrns int `json:"omciTransactionID"`
	}

	scanner := bufio.NewScanner(file)
	uniqueTnsIDs := map[int]int{}
	for scanner.Scan() {
	input := scanner.Text()
	// Look for device update logs only
	if !strings.Contains(input, "sent-omci-msg") {
	continue
	}
	// Check if deviceID is required
	if deviceID != "" {
	if !strings.Contains(input, deviceID) {
	continue
	}
	}
	if err := json.Unmarshal([]byte(input), &logEntry); err != nil {
	logger.Fatal(context.Background(), err)
	}
	uniqueTnsIDs[logEntry.OmciTrns]++
	}
	repeatedTrnsID := []int{}
	for k, v := range uniqueTnsIDs {
	if v != 1 {
	repeatedTrnsID = append(repeatedTrnsID, k)
	}
	}
	fmt.Println("RepeatedIDs", repeatedTrnsID, "TransID:", len(uniqueTnsIDs))
	}

	//CreateMockAdapter creates mock OLT and ONU adapters - this will automatically the grpc service hosted by that
	// adapter
	func CreateMockAdapter(
	ctx context.Context,
	adapterType int,
	coreEndpoint string,
	deviceType string,
	vendor string,
	childDeviceType string,
	childVendor string,
	) (interface{}, error) {

	var adpt interface{}
	switch adapterType {
	case OltAdapter:
	adpt = cm.NewOLTAdapter(ctx, coreEndpoint, deviceType, vendor, childDeviceType, childVendor)
	case OnuAdapter:
	adpt = cm.NewONUAdapter(ctx, coreEndpoint, deviceType, vendor)
	default:
	logger.Fatalf(ctx, "invalid-adapter-type-%d", adapterType)
	}
	return adpt, nil
	}

	//CreateAndRegisterAdapters creates mock ONU and OLT adapters and registers them to rw-core
	func CreateAndRegisterAdapters(
	ctx context.Context,
	t *testing.T,
	oltAdapters map[string]*AdapterInfo,
	onuAdapters map[string]*AdapterInfo,
	coreEndpoint string,
	) (map[string][]cm.OLTAdapter, map[string][]cm.ONUAdapter) {
	// Setup the ONU adapter first in this unit test environment. This makes it easier to test whether the
	// Core is ready to send grpc requests to the adapters. The unit test uses grpc to communicate with the
	// Core and as such it does not have inside knowledge when the adapters are ready.

	// Setup the ONU Adapters
	onuAdaptersMap := make(map[string][]*cm.ONUAdapter)
	for adapterType, adapterInfo := range onuAdapters {
	for replica := int32(1); replica <= adapterInfo.TotalReplica; replica++ {
	adpt, err := CreateMockAdapter(ctx, OnuAdapter, coreEndpoint, adapterInfo.DeviceType, adapterInfo.Vendor, adapterInfo.ChildDeviceType, adapterInfo.ChildVendor)
	assert.Nil(t, err)
	onuAdapter, ok := adpt.(*cm.ONUAdapter)
	assert.True(t, ok)
	assert.NotNil(t, onuAdapter)
	// Register the adapter
	adapterID := fmt.Sprintf("%s-%d", adapterType, replica)
	adapterToRegister := &voltha.Adapter{
	Id: adapterID,
	Vendor: adapterInfo.Vendor,
	Version: version.VersionInfo.Version,
	Type: adapterType,
	CurrentReplica: replica,
	TotalReplicas: adapterInfo.TotalReplica,
	Endpoint: onuAdapter.GetEndPoint(),
	}
	types := []*voltha.DeviceType{{Id: adapterInfo.DeviceType, AdapterType: adapterType, AcceptsAddRemoveFlowUpdates: true}}
	deviceTypes := &voltha.DeviceTypes{Items: types}
	coreClient, err := onuAdapter.GetCoreClient()
	assert.Nil(t, err)
	assert.NotNil(t, coreClient)
	if _, err := coreClient.RegisterAdapter(ctx, &ca.AdapterRegistration{
	Adapter: adapterToRegister,
	DTypes: deviceTypes}); err != nil {
	logger.Errorw(ctx, "failed-to-register-adapter", log.Fields{"error": err, "adapter": adapterToRegister.Id})
	assert.NotNil(t, err)
	}
	if _, ok := onuAdaptersMap[adapterType]; !ok {
	onuAdaptersMap[adapterType] = []*cm.ONUAdapter{}
	}
	onuAdaptersMap[adapterType] = append(onuAdaptersMap[adapterType], onuAdapter)
	}
	}

	// Setup the OLT Adapters
	oltAdaptersMap := make(map[string][]*cm.OLTAdapter)
	for adapterType, adapterInfo := range oltAdapters {
	for replica := int32(1); replica <= adapterInfo.TotalReplica; replica++ {
	adpt, err := CreateMockAdapter(ctx, OltAdapter, coreEndpoint, adapterInfo.DeviceType, adapterInfo.Vendor, adapterInfo.ChildDeviceType, adapterInfo.ChildVendor)
	assert.Nil(t, err)
	oltAdapter, ok := adpt.(*cm.OLTAdapter)
	assert.True(t, ok)
	assert.NotNil(t, oltAdapter)

	// Register the adapter
	adapterID := fmt.Sprintf("%s-%d", adapterType, replica)
	adapterToRegister := &voltha.Adapter{
	Id: adapterID,
	Vendor: adapterInfo.Vendor,
	Version: version.VersionInfo.Version,
	Type: adapterType,
	CurrentReplica: replica,
	TotalReplicas: adapterInfo.TotalReplica,
	Endpoint: oltAdapter.GetEndPoint(),
	}
	types := []*voltha.DeviceType{{Id: adapterInfo.DeviceType, AdapterType: adapterType, AcceptsAddRemoveFlowUpdates: true}}
	deviceTypes := &voltha.DeviceTypes{Items: types}
	coreClient, err := oltAdapter.GetCoreClient()
	assert.Nil(t, err)
	assert.NotNil(t, coreClient)

	if _, err := coreClient.RegisterAdapter(ctx, &ca.AdapterRegistration{
	Adapter: adapterToRegister,
	DTypes: deviceTypes}); err != nil {
	logger.Errorw(ctx, "failed-to-register-adapter", log.Fields{"error": err, "adapter": adapterToRegister.Id})
	assert.NotNil(t, err)
	}
	if _, ok := oltAdaptersMap[adapterType]; !ok {
	oltAdaptersMap[adapterType] = []*cm.OLTAdapter{}
	}
	oltAdaptersMap[adapterType] = append(oltAdaptersMap[adapterType], oltAdapter)
	}
	}

	return oltAdaptersMap, onuAdaptersMap
	}

	//StartEmbeddedEtcdServer creates and starts an Embedded etcd server locally.
	func StartEmbeddedEtcdServer(ctx context.Context, configName, storageDir, logLevel string) (*mock_etcd.EtcdServer, int, error) {
	kvClientPort, err := freeport.GetFreePort()
	if err != nil {
	return nil, 0, err
	}
	peerPort, err := freeport.GetFreePort()
	if err != nil {
	return nil, 0, err
	}
	etcdServer := mock_etcd.StartEtcdServer(ctx, mock_etcd.MKConfig(ctx, configName, kvClientPort, peerPort, storageDir, logLevel))
	if etcdServer == nil {
	return nil, 0, status.Error(codes.Internal, "Embedded server failed to start")
	}
	return etcdServer, kvClientPort, nil
	}

	//StopEmbeddedEtcdServer stops the embedded etcd server
	func StopEmbeddedEtcdServer(ctx context.Context, server *mock_etcd.EtcdServer) {
	if server != nil {
	server.Stop(ctx)
	}
	}

	//SetupKVClient creates a new etcd client
	func SetupKVClient(ctx context.Context, cf *config.RWCoreFlags, coreInstanceID string) kvstore.Client {
	client, err := kvstore.NewEtcdClient(ctx, cf.KVStoreAddress, cf.KVStoreTimeout, log.FatalLevel)
	if err != nil {
	panic("no kv client")
	}
	return client
	}

	//getRandomMacAddress returns a random mac address
	func getRandomMacAddress() string {
	rand.Seed(time.Now().UnixNano() / int64(rand.Intn(255)+1))
	return fmt.Sprintf("%02x:%02x:%02x:%02x:%02x:%02x",
	rand.Intn(255),
	rand.Intn(255),
	rand.Intn(255),
	rand.Intn(255),
	rand.Intn(255),
	rand.Intn(255),
	)
	}