diff --git a/vendor/github.com/opencord/voltha-lib-go/v7/pkg/db/backend.go b/vendor/github.com/opencord/voltha-lib-go/v7/pkg/db/backend.go
new file mode 100644
index 0000000..2e57a27
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/v7/pkg/db/backend.go
@@ -0,0 +1,272 @@
+/*
+ * 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 db
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"sync"
+	"time"
+
+	"github.com/opencord/voltha-lib-go/v7/pkg/db/kvstore"
+	"github.com/opencord/voltha-lib-go/v7/pkg/log"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+)
+
+const (
+	// Default Minimal Interval for posting alive state of backend kvstore on Liveness Channel
+	DefaultLivenessChannelInterval = time.Second * 30
+)
+
+// Backend structure holds details for accessing the kv store
+type Backend struct {
+	Client                  kvstore.Client
+	StoreType               string
+	Timeout                 time.Duration
+	Address                 string
+	PathPrefix              string
+	alive                   bool // Is this backend connection alive?
+	livenessMutex           sync.Mutex
+	liveness                chan bool     // channel to post alive state
+	LivenessChannelInterval time.Duration // regularly push alive state beyond this interval
+	lastLivenessTime        time.Time     // Instant of last alive state push
+}
+
+// NewBackend creates a new instance of a Backend structure
+func NewBackend(ctx context.Context, storeType string, address string, timeout time.Duration, pathPrefix string) *Backend {
+	var err error
+
+	b := &Backend{
+		StoreType:               storeType,
+		Address:                 address,
+		Timeout:                 timeout,
+		LivenessChannelInterval: DefaultLivenessChannelInterval,
+		PathPrefix:              pathPrefix,
+		alive:                   false, // connection considered down at start
+	}
+
+	if b.Client, err = b.newClient(ctx, address, timeout); err != nil {
+		logger.Errorw(ctx, "failed-to-create-kv-client",
+			log.Fields{
+				"type": storeType, "address": address,
+				"timeout": timeout, "prefix": pathPrefix,
+				"error": err.Error(),
+			})
+	}
+
+	return b
+}
+
+func (b *Backend) newClient(ctx context.Context, address string, timeout time.Duration) (kvstore.Client, error) {
+	switch b.StoreType {
+	case "etcd":
+		return kvstore.NewEtcdClient(ctx, address, timeout, log.WarnLevel)
+	}
+	return nil, errors.New("unsupported-kv-store")
+}
+
+func (b *Backend) makePath(ctx context.Context, key string) string {
+	path := fmt.Sprintf("%s/%s", b.PathPrefix, key)
+	return path
+}
+
+func (b *Backend) updateLiveness(ctx context.Context, alive bool) {
+	// Periodically push stream of liveness data to the channel,
+	// so that in a live state, the core does not timeout and
+	// send a forced liveness message. Push alive state if the
+	// last push to channel was beyond livenessChannelInterval
+	b.livenessMutex.Lock()
+	defer b.livenessMutex.Unlock()
+	if b.liveness != nil {
+		if b.alive != alive {
+			logger.Debug(ctx, "update-liveness-channel-reason-change")
+			b.liveness <- alive
+			b.lastLivenessTime = time.Now()
+		} else if time.Since(b.lastLivenessTime) > b.LivenessChannelInterval {
+			logger.Debug(ctx, "update-liveness-channel-reason-interval")
+			b.liveness <- alive
+			b.lastLivenessTime = time.Now()
+		}
+	}
+
+	// Emit log message only for alive state change
+	if b.alive != alive {
+		logger.Debugw(ctx, "change-kvstore-alive-status", log.Fields{"alive": alive})
+		b.alive = alive
+	}
+}
+
+// Perform a dummy Key Lookup on kvstore to test Connection Liveness and
+// post on Liveness channel
+func (b *Backend) PerformLivenessCheck(ctx context.Context) bool {
+	alive := b.Client.IsConnectionUp(ctx)
+	logger.Debugw(ctx, "kvstore-liveness-check-result", log.Fields{"alive": alive})
+
+	b.updateLiveness(ctx, alive)
+	return alive
+}
+
+// Enable the liveness monitor channel. This channel will report
+// a "true" or "false" on every kvstore operation which indicates whether
+// or not the connection is still Live. This channel is then picked up
+// by the service (i.e. rw_core / ro_core) to update readiness status
+// and/or take other actions.
+func (b *Backend) EnableLivenessChannel(ctx context.Context) chan bool {
+	logger.Debug(ctx, "enable-kvstore-liveness-channel")
+	b.livenessMutex.Lock()
+	defer b.livenessMutex.Unlock()
+	if b.liveness == nil {
+		b.liveness = make(chan bool, 10)
+		b.liveness <- b.alive
+		b.lastLivenessTime = time.Now()
+	}
+
+	return b.liveness
+}
+
+// Extract Alive status of Kvstore based on type of error
+func (b *Backend) isErrorIndicatingAliveKvstore(ctx context.Context, err error) bool {
+	// Alive unless observed an error indicating so
+	alive := true
+
+	if err != nil {
+
+		// timeout indicates kvstore not reachable/alive
+		if err == context.DeadlineExceeded {
+			alive = false
+		}
+
+		// Need to analyze client-specific errors based on backend type
+		if b.StoreType == "etcd" {
+
+			// For etcd backend, consider not-alive only for errors indicating
+			// timedout request or unavailable/corrupted cluster. For all remaining
+			// error codes listed in https://godoc.org/google.golang.org/grpc/codes#Code,
+			// we would not infer a not-alive backend because such a error may also
+			// occur due to bad client requests or sequence of operations
+			switch status.Code(err) {
+			case codes.DeadlineExceeded:
+				fallthrough
+			case codes.Unavailable:
+				fallthrough
+			case codes.DataLoss:
+				alive = false
+			}
+		}
+	}
+
+	return alive
+}
+
+// List retrieves one or more items that match the specified key
+func (b *Backend) List(ctx context.Context, key string) (map[string]*kvstore.KVPair, error) {
+	span, ctx := log.CreateChildSpan(ctx, "etcd-list")
+	defer span.Finish()
+
+	formattedPath := b.makePath(ctx, key)
+	logger.Debugw(ctx, "listing-key", log.Fields{"key": key, "path": formattedPath})
+
+	pair, err := b.Client.List(ctx, formattedPath)
+
+	b.updateLiveness(ctx, b.isErrorIndicatingAliveKvstore(ctx, err))
+
+	return pair, err
+}
+
+// Get retrieves an item that matches the specified key
+func (b *Backend) Get(ctx context.Context, key string) (*kvstore.KVPair, error) {
+	span, ctx := log.CreateChildSpan(ctx, "etcd-get")
+	defer span.Finish()
+
+	formattedPath := b.makePath(ctx, key)
+	logger.Debugw(ctx, "getting-key", log.Fields{"key": key, "path": formattedPath})
+
+	pair, err := b.Client.Get(ctx, formattedPath)
+
+	b.updateLiveness(ctx, b.isErrorIndicatingAliveKvstore(ctx, err))
+
+	return pair, err
+}
+
+// Put stores an item value under the specifed key
+func (b *Backend) Put(ctx context.Context, key string, value interface{}) error {
+	span, ctx := log.CreateChildSpan(ctx, "etcd-put")
+	defer span.Finish()
+
+	formattedPath := b.makePath(ctx, key)
+	logger.Debugw(ctx, "putting-key", log.Fields{"key": key, "path": formattedPath})
+
+	err := b.Client.Put(ctx, formattedPath, value)
+
+	b.updateLiveness(ctx, b.isErrorIndicatingAliveKvstore(ctx, err))
+
+	return err
+}
+
+// Delete removes an item under the specified key
+func (b *Backend) Delete(ctx context.Context, key string) error {
+	span, ctx := log.CreateChildSpan(ctx, "etcd-delete")
+	defer span.Finish()
+
+	formattedPath := b.makePath(ctx, key)
+	logger.Debugw(ctx, "deleting-key", log.Fields{"key": key, "path": formattedPath})
+
+	err := b.Client.Delete(ctx, formattedPath)
+
+	b.updateLiveness(ctx, b.isErrorIndicatingAliveKvstore(ctx, err))
+
+	return err
+}
+
+// DeleteWithPrefix removes items having prefix key
+func (b *Backend) DeleteWithPrefix(ctx context.Context, prefixKey string) error {
+	span, ctx := log.CreateChildSpan(ctx, "etcd-delete-with-prefix")
+	defer span.Finish()
+
+	formattedPath := b.makePath(ctx, prefixKey)
+	logger.Debugw(ctx, "deleting-prefix-key", log.Fields{"key": prefixKey, "path": formattedPath})
+
+	err := b.Client.DeleteWithPrefix(ctx, formattedPath)
+
+	b.updateLiveness(ctx, b.isErrorIndicatingAliveKvstore(ctx, err))
+
+	return err
+}
+
+// CreateWatch starts watching events for the specified key
+func (b *Backend) CreateWatch(ctx context.Context, key string, withPrefix bool) chan *kvstore.Event {
+	span, ctx := log.CreateChildSpan(ctx, "etcd-create-watch")
+	defer span.Finish()
+
+	formattedPath := b.makePath(ctx, key)
+	logger.Debugw(ctx, "creating-key-watch", log.Fields{"key": key, "path": formattedPath})
+
+	return b.Client.Watch(ctx, formattedPath, withPrefix)
+}
+
+// DeleteWatch stops watching events for the specified key
+func (b *Backend) DeleteWatch(ctx context.Context, key string, ch chan *kvstore.Event) {
+	span, ctx := log.CreateChildSpan(ctx, "etcd-delete-watch")
+	defer span.Finish()
+
+	formattedPath := b.makePath(ctx, key)
+	logger.Debugw(ctx, "deleting-key-watch", log.Fields{"key": key, "path": formattedPath})
+
+	b.Client.CloseWatch(ctx, formattedPath, ch)
+}
diff --git a/vendor/github.com/opencord/voltha-lib-go/v7/pkg/db/common.go b/vendor/github.com/opencord/voltha-lib-go/v7/pkg/db/common.go
new file mode 100644
index 0000000..d8a0571
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/v7/pkg/db/common.go
@@ -0,0 +1,31 @@
+/*
+ * Copyright 2020-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 db
+
+import (
+	"github.com/opencord/voltha-lib-go/v7/pkg/log"
+)
+
+var logger log.CLogger
+
+func init() {
+	// Setup this package so that it's log level can be modified at run time
+	var err error
+	logger, err = log.RegisterPackage(log.JSON, log.ErrorLevel, log.Fields{})
+	if err != nil {
+		panic(err)
+	}
+}
diff --git a/vendor/github.com/opencord/voltha-lib-go/v7/pkg/db/kvstore/client.go b/vendor/github.com/opencord/voltha-lib-go/v7/pkg/db/kvstore/client.go
new file mode 100644
index 0000000..e4b1fff
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/v7/pkg/db/kvstore/client.go
@@ -0,0 +1,95 @@
+/*
+ * 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"
+	"time"
+)
+
+const (
+	// Maximum channel buffer between publisher/subscriber goroutines
+	maxClientChannelBufferSize = 10
+)
+
+// These constants represent the event types returned by the KV client
+const (
+	PUT = iota
+	DELETE
+	CONNECTIONDOWN
+	UNKNOWN
+)
+
+// KVPair is a common wrapper for key-value pairs returned from the KV store
+type KVPair struct {
+	Key     string
+	Value   interface{}
+	Version int64
+	Session string
+	Lease   int64
+}
+
+// NewKVPair creates a new KVPair object
+func NewKVPair(key string, value interface{}, session string, lease int64, version int64) *KVPair {
+	kv := new(KVPair)
+	kv.Key = key
+	kv.Value = value
+	kv.Session = session
+	kv.Lease = lease
+	kv.Version = version
+	return kv
+}
+
+// Event is generated by the KV client when a key change is detected
+type Event struct {
+	EventType int
+	Key       interface{}
+	Value     interface{}
+	Version   int64
+}
+
+// NewEvent creates a new Event object
+func NewEvent(eventType int, key interface{}, value interface{}, version int64) *Event {
+	evnt := new(Event)
+	evnt.EventType = eventType
+	evnt.Key = key
+	evnt.Value = value
+	evnt.Version = version
+
+	return evnt
+}
+
+// Client represents the set of APIs a KV Client must implement
+type Client interface {
+	List(ctx context.Context, key string) (map[string]*KVPair, error)
+	Get(ctx context.Context, key string) (*KVPair, error)
+	Put(ctx context.Context, key string, value interface{}) error
+	Delete(ctx context.Context, key string) error
+	DeleteWithPrefix(ctx context.Context, prefixKey string) error
+	Watch(ctx context.Context, key string, withPrefix bool) chan *Event
+	IsConnectionUp(ctx context.Context) bool // timeout in second
+	CloseWatch(ctx context.Context, key string, ch chan *Event)
+	Close(ctx context.Context)
+
+	// These APIs are not used.  They will be cleaned up in release Voltha 2.9.
+	// It's not cleaned now to limit changes in all components
+	Reserve(ctx context.Context, key string, value interface{}, ttl time.Duration) (interface{}, error)
+	ReleaseReservation(ctx context.Context, key string) error
+	ReleaseAllReservations(ctx context.Context) error
+	RenewReservation(ctx context.Context, key string) error
+	AcquireLock(ctx context.Context, lockName string, timeout time.Duration) error
+	ReleaseLock(lockName string) error
+}
diff --git a/vendor/github.com/opencord/voltha-lib-go/v7/pkg/db/kvstore/common.go b/vendor/github.com/opencord/voltha-lib-go/v7/pkg/db/kvstore/common.go
new file mode 100644
index 0000000..8ac2a4a
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/v7/pkg/db/kvstore/common.go
@@ -0,0 +1,31 @@
+/*
+ * Copyright 2020-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 (
+	"github.com/opencord/voltha-lib-go/v7/pkg/log"
+)
+
+var logger log.CLogger
+
+func init() {
+	// Setup this package so that it's log level can be modified at run time
+	var err error
+	logger, err = log.RegisterPackage(log.JSON, log.ErrorLevel, log.Fields{})
+	if err != nil {
+		panic(err)
+	}
+}
diff --git a/vendor/github.com/opencord/voltha-lib-go/v7/pkg/db/kvstore/etcdclient.go b/vendor/github.com/opencord/voltha-lib-go/v7/pkg/db/kvstore/etcdclient.go
new file mode 100644
index 0000000..6ca5329
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/v7/pkg/db/kvstore/etcdclient.go
@@ -0,0 +1,474 @@
+/*
+ * 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"
+	"os"
+	"strconv"
+	"sync"
+	"time"
+
+	"github.com/opencord/voltha-lib-go/v7/pkg/log"
+	v3Client "go.etcd.io/etcd/clientv3"
+	v3rpcTypes "go.etcd.io/etcd/etcdserver/api/v3rpc/rpctypes"
+)
+
+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
+}
diff --git a/vendor/github.com/opencord/voltha-lib-go/v7/pkg/db/kvstore/etcdpool.go b/vendor/github.com/opencord/voltha-lib-go/v7/pkg/db/kvstore/etcdpool.go
new file mode 100644
index 0000000..4d33c27
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/v7/pkg/db/kvstore/etcdpool.go
@@ -0,0 +1,240 @@
+/*
+ * Copyright 2021-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 (
+	"container/list"
+	"context"
+	"errors"
+	"sync"
+	"time"
+
+	"github.com/opencord/voltha-lib-go/v7/pkg/log"
+	"go.etcd.io/etcd/clientv3"
+)
+
+// EtcdClientAllocator represents a generic interface to allocate an Etcd Client
+type EtcdClientAllocator interface {
+	Get(context.Context) (*clientv3.Client, error)
+	Put(*clientv3.Client)
+	Close(ctx context.Context)
+}
+
+// NewRoundRobinEtcdClientAllocator creates a new ETCD Client Allocator using a Round Robin scheme
+func NewRoundRobinEtcdClientAllocator(endpoints []string, timeout time.Duration, capacity, maxUsage int, level log.LogLevel) (EtcdClientAllocator, error) {
+	return &roundRobin{
+		all:       make(map[*clientv3.Client]*rrEntry),
+		full:      make(map[*clientv3.Client]*rrEntry),
+		waitList:  list.New(),
+		max:       maxUsage,
+		capacity:  capacity,
+		timeout:   timeout,
+		endpoints: endpoints,
+		logLevel:  level,
+		closingCh: make(chan struct{}, capacity*maxUsage),
+		stopCh:    make(chan struct{}),
+	}, nil
+}
+
+type rrEntry struct {
+	client *clientv3.Client
+	count  int
+	age    time.Time
+}
+
+type roundRobin struct {
+	//block chan struct{}
+	sync.Mutex
+	available []*rrEntry
+	all       map[*clientv3.Client]*rrEntry
+	full      map[*clientv3.Client]*rrEntry
+	waitList  *list.List
+	max       int
+	capacity  int
+	timeout   time.Duration
+	//ageOut    time.Duration
+	endpoints []string
+	size      int
+	logLevel  log.LogLevel
+	closing   bool
+	closingCh chan struct{}
+	stopCh    chan struct{}
+}
+
+// Get returns an Etcd client. If not is available, it will create one
+// until the maximum allowed capacity.  If maximum capacity has been
+// reached then it will wait until s used one is freed.
+func (r *roundRobin) Get(ctx context.Context) (*clientv3.Client, error) {
+	r.Lock()
+
+	if r.closing {
+		r.Unlock()
+		return nil, errors.New("pool-is-closing")
+	}
+
+	// first determine if we need to block, which would mean the
+	// available queue is empty and we are at capacity
+	if len(r.available) == 0 && r.size >= r.capacity {
+
+		// create a channel on which to wait and
+		// add it to the list
+		ch := make(chan struct{})
+		element := r.waitList.PushBack(ch)
+		r.Unlock()
+
+		// block until it is our turn or context
+		// expires or is canceled
+		select {
+		case <-r.stopCh:
+			logger.Info(ctx, "stop-waiting-pool-is-closing")
+			r.waitList.Remove(element)
+			return nil, errors.New("stop-waiting-pool-is-closing")
+		case <-ch:
+			r.waitList.Remove(element)
+		case <-ctx.Done():
+			r.waitList.Remove(element)
+			return nil, ctx.Err()
+		}
+		r.Lock()
+	}
+
+	defer r.Unlock()
+	if len(r.available) > 0 {
+		// pull off back end as it is operationally quicker
+		last := len(r.available) - 1
+		entry := r.available[last]
+		entry.count++
+		if entry.count >= r.max {
+			r.available = r.available[:last]
+			r.full[entry.client] = entry
+		}
+		entry.age = time.Now()
+		return entry.client, nil
+	}
+
+	logConfig := log.ConstructZapConfig(log.JSON, r.logLevel, log.Fields{})
+	// increase capacity
+	client, err := clientv3.New(clientv3.Config{
+		Endpoints:   r.endpoints,
+		DialTimeout: r.timeout,
+		LogConfig:   &logConfig,
+	})
+	if err != nil {
+		return nil, err
+	}
+	entry := &rrEntry{
+		client: client,
+		count:  1,
+	}
+	r.all[entry.client] = entry
+
+	if r.max > 1 {
+		r.available = append(r.available, entry)
+	} else {
+		r.full[entry.client] = entry
+	}
+	r.size++
+	return client, nil
+}
+
+// Put returns the Etcd Client back to the pool
+func (r *roundRobin) Put(client *clientv3.Client) {
+	r.Lock()
+
+	entry := r.all[client]
+	entry.count--
+
+	if r.closing {
+		// Close client if count is 0
+		if entry.count == 0 {
+			if err := entry.client.Close(); err != nil {
+				logger.Warnw(context.Background(), "error-closing-client", log.Fields{"error": err})
+			}
+			delete(r.all, entry.client)
+		}
+		// Notify Close function that a client was returned to the pool
+		r.closingCh <- struct{}{}
+		r.Unlock()
+		return
+	}
+
+	// This entry is now available for use, so
+	// if in full map add it to available and
+	// remove from full
+	if _, ok := r.full[client]; ok {
+		r.available = append(r.available, entry)
+		delete(r.full, client)
+	}
+
+	front := r.waitList.Front()
+	if front != nil {
+		ch := r.waitList.Remove(front)
+		r.Unlock()
+		// need to unblock if someone is waiting
+		ch.(chan struct{}) <- struct{}{}
+		return
+	}
+	r.Unlock()
+}
+
+func (r *roundRobin) Close(ctx context.Context) {
+	r.Lock()
+	r.closing = true
+
+	// Notify anyone waiting for a client to stop waiting
+	close(r.stopCh)
+
+	// Clean-up unused clients
+	for i := 0; i < len(r.available); i++ {
+		// Count 0 means no one is using that client
+		if r.available[i].count == 0 {
+			if err := r.available[i].client.Close(); err != nil {
+				logger.Warnw(ctx, "failure-closing-client", log.Fields{"client": r.available[i].client, "error": err})
+			}
+			// Remove client for all list
+			delete(r.all, r.available[i].client)
+		}
+	}
+
+	// Figure out how many clients are in use
+	numberInUse := 0
+	for _, rrEntry := range r.all {
+		numberInUse += rrEntry.count
+	}
+	r.Unlock()
+
+	if numberInUse == 0 {
+		logger.Info(ctx, "no-connection-in-use")
+		return
+	}
+
+	logger.Infow(ctx, "waiting-for-clients-return", log.Fields{"count": numberInUse})
+
+	// Wait for notifications when a client is returned to the pool
+	for {
+		select {
+		case <-r.closingCh:
+			numberInUse--
+			if numberInUse == 0 {
+				logger.Info(ctx, "all-connections-closed")
+				return
+			}
+		case <-ctx.Done():
+			logger.Warnw(ctx, "context-done", log.Fields{"error": ctx.Err()})
+			return
+		}
+	}
+}
diff --git a/vendor/github.com/opencord/voltha-lib-go/v7/pkg/db/kvstore/kvutils.go b/vendor/github.com/opencord/voltha-lib-go/v7/pkg/db/kvstore/kvutils.go
new file mode 100644
index 0000000..ca57542
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/v7/pkg/db/kvstore/kvutils.go
@@ -0,0 +1,78 @@
+/*
+ * 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"
+	"fmt"
+	"math"
+	"math/rand"
+	"time"
+)
+
+const (
+	minRetryInterval  = 100
+	maxRetryInterval  = 5000
+	incrementalFactor = 1.2
+	jitter            = 0.2
+)
+
+// ToString converts an interface value to a string.  The interface should either be of
+// a string type or []byte.  Otherwise, an error is returned.
+func ToString(value interface{}) (string, error) {
+	switch t := value.(type) {
+	case []byte:
+		return string(value.([]byte)), nil
+	case string:
+		return value.(string), nil
+	default:
+		return "", fmt.Errorf("unexpected-type-%T", t)
+	}
+}
+
+// ToByte converts an interface value to a []byte.  The interface should either be of
+// a string type or []byte.  Otherwise, an error is returned.
+func ToByte(value interface{}) ([]byte, error) {
+	switch t := value.(type) {
+	case []byte:
+		return value.([]byte), nil
+	case string:
+		return []byte(value.(string)), nil
+	default:
+		return nil, fmt.Errorf("unexpected-type-%T", t)
+	}
+}
+
+// backoff waits an amount of time that is proportional to the attempt value.  The wait time in a range of
+// minRetryInterval and maxRetryInterval.
+func backoff(ctx context.Context, attempt int) error {
+	if attempt == 0 {
+		return nil
+	}
+	backoff := int(minRetryInterval + incrementalFactor*math.Exp(float64(attempt)))
+	backoff *= 1 + int(jitter*(rand.Float64()*2-1))
+	if backoff > maxRetryInterval {
+		backoff = maxRetryInterval
+	}
+	ticker := time.NewTicker(time.Duration(backoff) * time.Millisecond)
+	defer ticker.Stop()
+	select {
+	case <-ctx.Done():
+		return ctx.Err()
+	case <-ticker.C:
+	}
+	return nil
+}