diff --git a/vendor/github.com/opencord/voltha-lib-go/v6/pkg/db/kvstore/etcdclient.go b/vendor/github.com/opencord/voltha-lib-go/v6/pkg/db/kvstore/etcdclient.go
new file mode 100644
index 0000000..88b5b45
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/v6/pkg/db/kvstore/etcdclient.go
@@ -0,0 +1,473 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+
+ * 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 kvstore
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"github.com/opencord/voltha-lib-go/v6/pkg/log"
+	v3Client "go.etcd.io/etcd/clientv3"
+	v3rpcTypes "go.etcd.io/etcd/etcdserver/api/v3rpc/rpctypes"
+	"os"
+	"strconv"
+	"sync"
+	"time"
+)
+
+const (
+	poolCapacityEnvName = "VOLTHA_ETCD_CLIENT_POOL_CAPACITY"
+	maxUsageEnvName     = "VOLTHA_ETCD_CLIENT_MAX_USAGE"
+)
+
+const (
+	defaultMaxPoolCapacity = 1000 // Default size of an Etcd Client pool
+	defaultMaxPoolUsage    = 100  // Maximum concurrent request an Etcd Client is allowed to process
+)
+
+// EtcdClient represents the Etcd KV store client
+type EtcdClient struct {
+	pool               EtcdClientAllocator
+	watchedChannels    sync.Map
+	watchedClients     map[string]*v3Client.Client
+	watchedClientsLock sync.RWMutex
+}
+
+// NewEtcdCustomClient returns a new client for the Etcd KV store allowing
+// the called to specify etcd client configuration
+func NewEtcdCustomClient(ctx context.Context, addr string, timeout time.Duration, level log.LogLevel) (*EtcdClient, error) {
+	// Get the capacity and max usage from the environment
+	capacity := defaultMaxPoolCapacity
+	maxUsage := defaultMaxPoolUsage
+	if capacityStr, present := os.LookupEnv(poolCapacityEnvName); present {
+		if val, err := strconv.Atoi(capacityStr); err == nil {
+			capacity = val
+			logger.Infow(ctx, "env-variable-set", log.Fields{"pool-capacity": capacity})
+		} else {
+			logger.Warnw(ctx, "invalid-capacity-value", log.Fields{"error": err, "capacity": capacityStr})
+		}
+	}
+	if maxUsageStr, present := os.LookupEnv(maxUsageEnvName); present {
+		if val, err := strconv.Atoi(maxUsageStr); err == nil {
+			maxUsage = val
+			logger.Infow(ctx, "env-variable-set", log.Fields{"max-usage": maxUsage})
+		} else {
+			logger.Warnw(ctx, "invalid-max-usage-value", log.Fields{"error": err, "max-usage": maxUsageStr})
+		}
+	}
+
+	var err error
+
+	pool, err := NewRoundRobinEtcdClientAllocator([]string{addr}, timeout, capacity, maxUsage, level)
+	if err != nil {
+		logger.Errorw(ctx, "failed-to-create-rr-client", log.Fields{
+			"error": err,
+		})
+	}
+
+	logger.Infow(ctx, "etcd-pool-created", log.Fields{"capacity": capacity, "max-usage": maxUsage})
+
+	return &EtcdClient{pool: pool,
+		watchedClients: make(map[string]*v3Client.Client),
+	}, nil
+}
+
+// NewEtcdClient returns a new client for the Etcd KV store
+func NewEtcdClient(ctx context.Context, addr string, timeout time.Duration, level log.LogLevel) (*EtcdClient, error) {
+	return NewEtcdCustomClient(ctx, addr, timeout, level)
+}
+
+// IsConnectionUp returns whether the connection to the Etcd KV store is up.  If a timeout occurs then
+// it is assumed the connection is down or unreachable.
+func (c *EtcdClient) IsConnectionUp(ctx context.Context) bool {
+	// Let's try to get a non existent key.  If the connection is up then there will be no error returned.
+	if _, err := c.Get(ctx, "non-existent-key"); err != nil {
+		return false
+	}
+	return true
+}
+
+// List returns an array of key-value pairs with key as a prefix.  Timeout defines how long the function will
+// wait for a response
+func (c *EtcdClient) List(ctx context.Context, key string) (map[string]*KVPair, error) {
+	client, err := c.pool.Get(ctx)
+	if err != nil {
+		return nil, err
+	}
+	defer c.pool.Put(client)
+	resp, err := client.Get(ctx, key, v3Client.WithPrefix())
+
+	if err != nil {
+		logger.Error(ctx, err)
+		return nil, err
+	}
+	m := make(map[string]*KVPair)
+	for _, ev := range resp.Kvs {
+		m[string(ev.Key)] = NewKVPair(string(ev.Key), ev.Value, "", ev.Lease, ev.Version)
+	}
+	return m, nil
+}
+
+// Get returns a key-value pair for a given key. Timeout defines how long the function will
+// wait for a response
+func (c *EtcdClient) Get(ctx context.Context, key string) (*KVPair, error) {
+	client, err := c.pool.Get(ctx)
+	if err != nil {
+		return nil, err
+	}
+	defer c.pool.Put(client)
+
+	attempt := 0
+
+startLoop:
+	for {
+		resp, err := client.Get(ctx, key)
+		if err != nil {
+			switch err {
+			case context.Canceled:
+				logger.Warnw(ctx, "context-cancelled", log.Fields{"error": err})
+			case context.DeadlineExceeded:
+				logger.Warnw(ctx, "context-deadline-exceeded", log.Fields{"error": err, "context": ctx})
+			case v3rpcTypes.ErrEmptyKey:
+				logger.Warnw(ctx, "etcd-client-error", log.Fields{"error": err})
+			case v3rpcTypes.ErrLeaderChanged,
+				v3rpcTypes.ErrGRPCNoLeader,
+				v3rpcTypes.ErrTimeout,
+				v3rpcTypes.ErrTimeoutDueToLeaderFail,
+				v3rpcTypes.ErrTimeoutDueToConnectionLost:
+				// Retry for these server errors
+				attempt += 1
+				if er := backoff(ctx, attempt); er != nil {
+					logger.Warnw(ctx, "get-retries-failed", log.Fields{"key": key, "error": er, "attempt": attempt})
+					return nil, err
+				}
+				logger.Warnw(ctx, "retrying-get", log.Fields{"key": key, "error": err, "attempt": attempt})
+				goto startLoop
+			default:
+				logger.Warnw(ctx, "etcd-server-error", log.Fields{"error": err})
+			}
+			return nil, err
+		}
+
+		for _, ev := range resp.Kvs {
+			// Only one value is returned
+			return NewKVPair(string(ev.Key), ev.Value, "", ev.Lease, ev.Version), nil
+		}
+		return nil, nil
+	}
+}
+
+// Put writes a key-value pair to the KV store.  Value can only be a string or []byte since the etcd API
+// accepts only a string as a value for a put operation. Timeout defines how long the function will
+// wait for a response
+func (c *EtcdClient) Put(ctx context.Context, key string, value interface{}) error {
+
+	// Validate that we can convert value to a string as etcd API expects a string
+	var val string
+	var err error
+	if val, err = ToString(value); err != nil {
+		return fmt.Errorf("unexpected-type-%T", value)
+	}
+
+	client, err := c.pool.Get(ctx)
+	if err != nil {
+		return err
+	}
+	defer c.pool.Put(client)
+
+	attempt := 0
+startLoop:
+	for {
+		_, err = client.Put(ctx, key, val)
+		if err != nil {
+			switch err {
+			case context.Canceled:
+				logger.Warnw(ctx, "context-cancelled", log.Fields{"error": err})
+			case context.DeadlineExceeded:
+				logger.Warnw(ctx, "context-deadline-exceeded", log.Fields{"error": err, "context": ctx})
+			case v3rpcTypes.ErrEmptyKey:
+				logger.Warnw(ctx, "etcd-client-error", log.Fields{"error": err})
+			case v3rpcTypes.ErrLeaderChanged,
+				v3rpcTypes.ErrGRPCNoLeader,
+				v3rpcTypes.ErrTimeout,
+				v3rpcTypes.ErrTimeoutDueToLeaderFail,
+				v3rpcTypes.ErrTimeoutDueToConnectionLost:
+				// Retry for these server errors
+				attempt += 1
+				if er := backoff(ctx, attempt); er != nil {
+					logger.Warnw(ctx, "put-retries-failed", log.Fields{"key": key, "error": er, "attempt": attempt})
+					return err
+				}
+				logger.Warnw(ctx, "retrying-put", log.Fields{"key": key, "error": err, "attempt": attempt})
+				goto startLoop
+			default:
+				logger.Warnw(ctx, "etcd-server-error", log.Fields{"error": err})
+			}
+			return err
+		}
+		return nil
+	}
+}
+
+// Delete removes a key from the KV store. Timeout defines how long the function will
+// wait for a response
+func (c *EtcdClient) Delete(ctx context.Context, key string) error {
+	client, err := c.pool.Get(ctx)
+	if err != nil {
+		return err
+	}
+	defer c.pool.Put(client)
+
+	attempt := 0
+startLoop:
+	for {
+		_, err = client.Delete(ctx, key)
+		if err != nil {
+			switch err {
+			case context.Canceled:
+				logger.Warnw(ctx, "context-cancelled", log.Fields{"error": err})
+			case context.DeadlineExceeded:
+				logger.Warnw(ctx, "context-deadline-exceeded", log.Fields{"error": err, "context": ctx})
+			case v3rpcTypes.ErrEmptyKey:
+				logger.Warnw(ctx, "etcd-client-error", log.Fields{"error": err})
+			case v3rpcTypes.ErrLeaderChanged,
+				v3rpcTypes.ErrGRPCNoLeader,
+				v3rpcTypes.ErrTimeout,
+				v3rpcTypes.ErrTimeoutDueToLeaderFail,
+				v3rpcTypes.ErrTimeoutDueToConnectionLost:
+				// Retry for these server errors
+				attempt += 1
+				if er := backoff(ctx, attempt); er != nil {
+					logger.Warnw(ctx, "delete-retries-failed", log.Fields{"key": key, "error": er, "attempt": attempt})
+					return err
+				}
+				logger.Warnw(ctx, "retrying-delete", log.Fields{"key": key, "error": err, "attempt": attempt})
+				goto startLoop
+			default:
+				logger.Warnw(ctx, "etcd-server-error", log.Fields{"error": err})
+			}
+			return err
+		}
+		logger.Debugw(ctx, "key(s)-deleted", log.Fields{"key": key})
+		return nil
+	}
+}
+
+func (c *EtcdClient) DeleteWithPrefix(ctx context.Context, prefixKey string) error {
+
+	client, err := c.pool.Get(ctx)
+	if err != nil {
+		return err
+	}
+	defer c.pool.Put(client)
+
+	//delete the prefix
+	if _, err := client.Delete(ctx, prefixKey, v3Client.WithPrefix()); err != nil {
+		logger.Errorw(ctx, "failed-to-delete-prefix-key", log.Fields{"key": prefixKey, "error": err})
+		return err
+	}
+	logger.Debugw(ctx, "key(s)-deleted", log.Fields{"key": prefixKey})
+	return nil
+}
+
+// Watch provides the watch capability on a given key.  It returns a channel onto which the callee needs to
+// listen to receive Events.
+func (c *EtcdClient) Watch(ctx context.Context, key string, withPrefix bool) chan *Event {
+	var err error
+	// Reuse the Etcd client when multiple callees are watching the same key.
+	c.watchedClientsLock.Lock()
+	client, exist := c.watchedClients[key]
+	if !exist {
+		client, err = c.pool.Get(ctx)
+		if err != nil {
+			logger.Errorw(ctx, "failed-to-an-etcd-client", log.Fields{"key": key, "error": err})
+			c.watchedClientsLock.Unlock()
+			return nil
+		}
+		c.watchedClients[key] = client
+	}
+	c.watchedClientsLock.Unlock()
+
+	w := v3Client.NewWatcher(client)
+	ctx, cancel := context.WithCancel(ctx)
+	var channel v3Client.WatchChan
+	if withPrefix {
+		channel = w.Watch(ctx, key, v3Client.WithPrefix())
+	} else {
+		channel = w.Watch(ctx, key)
+	}
+
+	// Create a new channel
+	ch := make(chan *Event, maxClientChannelBufferSize)
+
+	// Keep track of the created channels so they can be closed when required
+	channelMap := make(map[chan *Event]v3Client.Watcher)
+	channelMap[ch] = w
+	channelMaps := c.addChannelMap(key, channelMap)
+
+	// Changing the log field (from channelMaps) as the underlying logger cannot format the map of channels into a
+	// json format.
+	logger.Debugw(ctx, "watched-channels", log.Fields{"len": len(channelMaps)})
+	// Launch a go routine to listen for updates
+	go c.listenForKeyChange(ctx, channel, ch, cancel)
+
+	return ch
+
+}
+
+func (c *EtcdClient) addChannelMap(key string, channelMap map[chan *Event]v3Client.Watcher) []map[chan *Event]v3Client.Watcher {
+	var channels interface{}
+	var exists bool
+
+	if channels, exists = c.watchedChannels.Load(key); exists {
+		channels = append(channels.([]map[chan *Event]v3Client.Watcher), channelMap)
+	} else {
+		channels = []map[chan *Event]v3Client.Watcher{channelMap}
+	}
+	c.watchedChannels.Store(key, channels)
+
+	return channels.([]map[chan *Event]v3Client.Watcher)
+}
+
+func (c *EtcdClient) removeChannelMap(key string, pos int) []map[chan *Event]v3Client.Watcher {
+	var channels interface{}
+	var exists bool
+
+	if channels, exists = c.watchedChannels.Load(key); exists {
+		channels = append(channels.([]map[chan *Event]v3Client.Watcher)[:pos], channels.([]map[chan *Event]v3Client.Watcher)[pos+1:]...)
+		c.watchedChannels.Store(key, channels)
+	}
+
+	return channels.([]map[chan *Event]v3Client.Watcher)
+}
+
+func (c *EtcdClient) getChannelMaps(key string) ([]map[chan *Event]v3Client.Watcher, bool) {
+	var channels interface{}
+	var exists bool
+
+	channels, exists = c.watchedChannels.Load(key)
+
+	if channels == nil {
+		return nil, exists
+	}
+
+	return channels.([]map[chan *Event]v3Client.Watcher), exists
+}
+
+// CloseWatch closes a specific watch. Both the key and the channel are required when closing a watch as there
+// may be multiple listeners on the same key.  The previously created channel serves as a key
+func (c *EtcdClient) CloseWatch(ctx context.Context, key string, ch chan *Event) {
+	// Get the array of channels mapping
+	var watchedChannels []map[chan *Event]v3Client.Watcher
+	var ok bool
+
+	if watchedChannels, ok = c.getChannelMaps(key); !ok {
+		logger.Warnw(ctx, "key-has-no-watched-channels", log.Fields{"key": key})
+		return
+	}
+	// Look for the channels
+	var pos = -1
+	for i, chMap := range watchedChannels {
+		if t, ok := chMap[ch]; ok {
+			logger.Debug(ctx, "channel-found")
+			// Close the etcd watcher before the client channel.  This should close the etcd channel as well
+			if err := t.Close(); err != nil {
+				logger.Errorw(ctx, "watcher-cannot-be-closed", log.Fields{"key": key, "error": err})
+			}
+			pos = i
+			break
+		}
+	}
+
+	channelMaps, _ := c.getChannelMaps(key)
+	// Remove that entry if present
+	if pos >= 0 {
+		channelMaps = c.removeChannelMap(key, pos)
+	}
+
+	// If we don't have any keys being watched then return the Etcd client to the pool
+	if len(channelMaps) == 0 {
+		c.watchedClientsLock.Lock()
+		// Sanity
+		if client, ok := c.watchedClients[key]; ok {
+			c.pool.Put(client)
+			delete(c.watchedClients, key)
+		}
+		c.watchedClientsLock.Unlock()
+	}
+	logger.Infow(ctx, "watcher-channel-exiting", log.Fields{"key": key, "channel": channelMaps})
+}
+
+func (c *EtcdClient) listenForKeyChange(ctx context.Context, channel v3Client.WatchChan, ch chan<- *Event, cancel context.CancelFunc) {
+	logger.Debug(ctx, "start-listening-on-channel ...")
+	defer cancel()
+	defer close(ch)
+	for resp := range channel {
+		for _, ev := range resp.Events {
+			ch <- NewEvent(getEventType(ev), ev.Kv.Key, ev.Kv.Value, ev.Kv.Version)
+		}
+	}
+	logger.Debug(ctx, "stop-listening-on-channel ...")
+}
+
+func getEventType(event *v3Client.Event) int {
+	switch event.Type {
+	case v3Client.EventTypePut:
+		return PUT
+	case v3Client.EventTypeDelete:
+		return DELETE
+	}
+	return UNKNOWN
+}
+
+// Close closes all the connection in the pool store client
+func (c *EtcdClient) Close(ctx context.Context) {
+	logger.Debug(ctx, "closing-etcd-pool")
+	c.pool.Close(ctx)
+}
+
+// The APIs below are not used
+var errUnimplemented = errors.New("deprecated")
+
+// Reserve is deprecated
+func (c *EtcdClient) Reserve(ctx context.Context, key string, value interface{}, ttl time.Duration) (interface{}, error) {
+	return nil, errUnimplemented
+}
+
+// ReleaseAllReservations is deprecated
+func (c *EtcdClient) ReleaseAllReservations(ctx context.Context) error {
+	return errUnimplemented
+}
+
+// ReleaseReservation is deprecated
+func (c *EtcdClient) ReleaseReservation(ctx context.Context, key string) error {
+	return errUnimplemented
+}
+
+// RenewReservation is deprecated
+func (c *EtcdClient) RenewReservation(ctx context.Context, key string) error {
+	return errUnimplemented
+}
+
+// AcquireLock is deprecated
+func (c *EtcdClient) AcquireLock(ctx context.Context, lockName string, timeout time.Duration) error {
+	return errUnimplemented
+}
+
+// ReleaseLock is deprecated
+func (c *EtcdClient) ReleaseLock(lockName string) error {
+	return errUnimplemented
+}