diff --git a/vendor/github.com/opencord/voltha-lib-go/v3/pkg/log/utils.go b/vendor/github.com/opencord/voltha-lib-go/v3/pkg/log/utils.go
new file mode 100644
index 0000000..82c3d7d
--- /dev/null
+++ b/vendor/github.com/opencord/voltha-lib-go/v3/pkg/log/utils.go
@@ -0,0 +1,468 @@
+/*
+ * 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.
+ */
+
+// File contains utility functions to support Open Tracing in conjunction with
+// Enhanced Logging based on context propagation
+
+package log
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"github.com/opentracing/opentracing-go"
+	jtracing "github.com/uber/jaeger-client-go"
+	jcfg "github.com/uber/jaeger-client-go/config"
+	"io"
+	"os"
+	"strings"
+	"sync"
+)
+
+const (
+	RootSpanNameKey = "op-name"
+)
+
+// Global Settings governing the Log Correlation and Tracing features. Should only
+// be updated through the exposed public methods
+type LogFeaturesManager struct {
+	isTracePublishingEnabled bool
+	isLogCorrelationEnabled  bool
+	componentName            string // Name of component extracted from ENV variable
+	activeTraceAgentAddress  string
+	lock                     sync.Mutex
+}
+
+var globalLFM *LogFeaturesManager = &LogFeaturesManager{}
+
+func GetGlobalLFM() *LogFeaturesManager {
+	return globalLFM
+}
+
+// A Wrapper to utilize currently Active Tracer instance. The middleware library being used for generating
+// Spans for GRPC API calls does not support dynamically setting the Active Tracer similar to the SetGlobalTracer method
+// provided by OpenTracing API
+type ActiveTracerProxy struct {
+}
+
+func (atw ActiveTracerProxy) StartSpan(operationName string, opts ...opentracing.StartSpanOption) opentracing.Span {
+	return opentracing.GlobalTracer().StartSpan(operationName, opts...)
+}
+
+func (atw ActiveTracerProxy) Inject(sm opentracing.SpanContext, format interface{}, carrier interface{}) error {
+	return opentracing.GlobalTracer().Inject(sm, format, carrier)
+}
+
+func (atw ActiveTracerProxy) Extract(format interface{}, carrier interface{}) (opentracing.SpanContext, error) {
+	return opentracing.GlobalTracer().Extract(format, carrier)
+}
+
+// Jaeger complaint Logger instance to redirect logs to Default Logger
+type traceLogger struct {
+	logger *clogger
+}
+
+func (tl traceLogger) Error(msg string) {
+	tl.logger.Error(context.Background(), msg)
+}
+
+func (tl traceLogger) Infof(msg string, args ...interface{}) {
+	// Tracing logs should be performed only at Debug Verbosity
+	tl.logger.Debugf(context.Background(), msg, args...)
+}
+
+// Wrapper to handle correct Closer call at the time of Process Termination
+type traceCloser struct {
+}
+
+func (c traceCloser) Close() error {
+	currentActiveTracer := opentracing.GlobalTracer()
+	if currentActiveTracer != nil {
+		if jTracer, ok := currentActiveTracer.(*jtracing.Tracer); ok {
+			jTracer.Close()
+		}
+	}
+
+	return nil
+}
+
+// Method to Initialize Jaeger based Tracing client based on initial status of Tracing Publish and Log Correlation
+func (lfm *LogFeaturesManager) InitTracingAndLogCorrelation(tracePublishEnabled bool, traceAgentAddress string, logCorrelationEnabled bool) (io.Closer, error) {
+	lfm.componentName = os.Getenv("COMPONENT_NAME")
+	if lfm.componentName == "" {
+		return nil, errors.New("Unable to retrieve PoD Component Name from Runtime env")
+	}
+
+	lfm.lock.Lock()
+	defer lfm.lock.Unlock()
+
+	// Use NoopTracer when both Tracing Publishing and Log Correlation are disabled
+	if !tracePublishEnabled && !logCorrelationEnabled {
+		logger.Info(context.Background(), "Skipping Global Tracer initialization as both Trace publish and Log correlation are configured as disabled")
+		lfm.isTracePublishingEnabled = false
+		lfm.isLogCorrelationEnabled = false
+		opentracing.SetGlobalTracer(opentracing.NoopTracer{})
+		return traceCloser{}, nil
+	}
+
+	tracer, _, err := lfm.constructJaegerTracer(tracePublishEnabled, traceAgentAddress, true)
+	if err != nil {
+		return nil, err
+	}
+
+	// Initialize variables representing Active Status
+	opentracing.SetGlobalTracer(tracer)
+	lfm.isTracePublishingEnabled = tracePublishEnabled
+	lfm.activeTraceAgentAddress = traceAgentAddress
+	lfm.isLogCorrelationEnabled = logCorrelationEnabled
+	return traceCloser{}, nil
+}
+
+// Method to replace Active Tracer along with graceful closer of previous tracer
+func (lfm *LogFeaturesManager) replaceActiveTracer(tracer opentracing.Tracer) {
+	currentActiveTracer := opentracing.GlobalTracer()
+	opentracing.SetGlobalTracer(tracer)
+
+	if currentActiveTracer != nil {
+		if jTracer, ok := currentActiveTracer.(*jtracing.Tracer); ok {
+			jTracer.Close()
+		}
+	}
+}
+
+func (lfm *LogFeaturesManager) GetLogCorrelationStatus() bool {
+	lfm.lock.Lock()
+	defer lfm.lock.Unlock()
+
+	return lfm.isLogCorrelationEnabled
+}
+
+func (lfm *LogFeaturesManager) SetLogCorrelationStatus(isEnabled bool) {
+	lfm.lock.Lock()
+	defer lfm.lock.Unlock()
+
+	if isEnabled == lfm.isLogCorrelationEnabled {
+		logger.Debugf(context.Background(), "Ignoring Log Correlation Set operation with value %t; current Status same as desired", isEnabled)
+		return
+	}
+
+	if isEnabled {
+		// Construct new Tracer instance if Log Correlation has been enabled and current active tracer is a NoopTracer instance.
+		// Continue using the earlier tracer instance in case of any error
+		if _, ok := opentracing.GlobalTracer().(opentracing.NoopTracer); ok {
+			tracer, _, err := lfm.constructJaegerTracer(lfm.isTracePublishingEnabled, lfm.activeTraceAgentAddress, false)
+			if err != nil {
+				logger.Warnf(context.Background(), "Log Correlation Enable operation failed with error: %s", err.Error())
+				return
+			}
+
+			lfm.replaceActiveTracer(tracer)
+		}
+
+		lfm.isLogCorrelationEnabled = true
+		logger.Info(context.Background(), "Log Correlation has been enabled")
+
+	} else {
+		// Switch to NoopTracer when Log Correlation has been disabled and Tracing Publish is already disabled
+		if _, ok := opentracing.GlobalTracer().(opentracing.NoopTracer); !ok && !lfm.isTracePublishingEnabled {
+			lfm.replaceActiveTracer(opentracing.NoopTracer{})
+		}
+
+		lfm.isLogCorrelationEnabled = false
+		logger.Info(context.Background(), "Log Correlation has been disabled")
+	}
+}
+
+func (lfm *LogFeaturesManager) GetTracePublishingStatus() bool {
+	lfm.lock.Lock()
+	defer lfm.lock.Unlock()
+
+	return lfm.isTracePublishingEnabled
+}
+
+func (lfm *LogFeaturesManager) SetTracePublishingStatus(isEnabled bool) {
+	lfm.lock.Lock()
+	defer lfm.lock.Unlock()
+
+	if isEnabled == lfm.isTracePublishingEnabled {
+		logger.Debugf(context.Background(), "Ignoring Trace Publishing Set operation with value %t; current Status same as desired", isEnabled)
+		return
+	}
+
+	if isEnabled {
+		// Construct new Tracer instance if Tracing Publish has been enabled (even if a Jaeger instance is already active)
+		// This is needed to ensure that a fresh lookup of Jaeger Agent address is performed again while performing
+		// Disable-Enable of Tracing
+		tracer, _, err := lfm.constructJaegerTracer(isEnabled, lfm.activeTraceAgentAddress, false)
+		if err != nil {
+			logger.Warnf(context.Background(), "Trace Publishing Enable operation failed with error: %s", err.Error())
+			return
+		}
+		lfm.replaceActiveTracer(tracer)
+
+		lfm.isTracePublishingEnabled = true
+		logger.Info(context.Background(), "Tracing Publishing has been enabled")
+	} else {
+		// Switch to NoopTracer when Tracing Publish has been disabled and Log Correlation is already disabled
+		if !lfm.isLogCorrelationEnabled {
+			lfm.replaceActiveTracer(opentracing.NoopTracer{})
+		} else {
+			// Else construct a new Jaeger Instance with publishing disabled
+			tracer, _, err := lfm.constructJaegerTracer(isEnabled, lfm.activeTraceAgentAddress, false)
+			if err != nil {
+				logger.Warnf(context.Background(), "Trace Publishing Disable operation failed with error: %s", err.Error())
+				return
+			}
+			lfm.replaceActiveTracer(tracer)
+		}
+
+		lfm.isTracePublishingEnabled = false
+		logger.Info(context.Background(), "Tracing Publishing has been disabled")
+	}
+}
+
+// Method to contruct a new Jaeger Tracer instance based on given Trace Agent address and Publish status.
+// The last attribute indicates whether to use Loopback IP for creating Jaeger Client when the DNS lookup
+// of supplied Trace Agent address has failed. It is fine to fallback during the initialization step, but
+// not later (when enabling/disabling the status dynamically)
+func (lfm *LogFeaturesManager) constructJaegerTracer(tracePublishEnabled bool, traceAgentAddress string, fallbackToLoopbackAllowed bool) (opentracing.Tracer, io.Closer, error) {
+	cfg := jcfg.Configuration{ServiceName: lfm.componentName}
+
+	var err error
+	var jReporterConfig jcfg.ReporterConfig
+	var jReporterCfgOption jtracing.Reporter
+
+	logger.Info(context.Background(), "Constructing new Jaeger Tracer instance")
+
+	// Attempt Trace Agent Address first; will fallback to Loopback IP if it fails
+	jReporterConfig = jcfg.ReporterConfig{LocalAgentHostPort: traceAgentAddress, LogSpans: true}
+	jReporterCfgOption, err = jReporterConfig.NewReporter(lfm.componentName, jtracing.NewNullMetrics(), traceLogger{logger: logger.(*clogger)})
+
+	if err != nil {
+		if !fallbackToLoopbackAllowed {
+			return nil, nil, errors.New("Reporter Creation for given Trace Agent address " + traceAgentAddress + " failed with error : " + err.Error())
+		}
+
+		logger.Infow(context.Background(), "Unable to create Reporter with given Trace Agent address",
+			Fields{"error": err, "address": traceAgentAddress})
+		// The Reporter initialization may fail due to Invalid Agent address or non-existent Agent (DNS lookup failure).
+		// It is essential for Tracer Instance to still start for correct Span propagation needed for log correlation.
+		// Thus, falback to use loopback IP for Reporter initialization before throwing back any error
+		tracePublishEnabled = false
+
+		jReporterConfig.LocalAgentHostPort = "127.0.0.1:6831"
+		jReporterCfgOption, err = jReporterConfig.NewReporter(lfm.componentName, jtracing.NewNullMetrics(), traceLogger{logger: logger.(*clogger)})
+		if err != nil {
+			return nil, nil, errors.New("Failed to initialize Jaeger Tracing due to Reporter creation error : " + err.Error())
+		}
+	}
+
+	// To start with, we are using Constant Sampling type
+	samplerParam := 0 // 0: Do not publish span, 1: Publish
+	if tracePublishEnabled {
+		samplerParam = 1
+	}
+	jSamplerConfig := jcfg.SamplerConfig{Type: "const", Param: float64(samplerParam)}
+	jSamplerCfgOption, err := jSamplerConfig.NewSampler(lfm.componentName, jtracing.NewNullMetrics())
+	if err != nil {
+		return nil, nil, errors.New("Unable to create Sampler : " + err.Error())
+	}
+
+	return cfg.NewTracer(jcfg.Reporter(jReporterCfgOption), jcfg.Sampler(jSamplerCfgOption))
+}
+
+func TerminateTracing(c io.Closer) {
+	err := c.Close()
+	if err != nil {
+		logger.Error(context.Background(), "error-while-closing-jaeger-tracer", Fields{"err": err})
+	}
+}
+
+// Extracts details of Execution Context as log fields from the Tracing Span injected into the
+// context instance. Following log fields are extracted:
+// 1. Operation Name : key as 'op-name' and value as Span operation name
+// 2. Operation Id : key as 'op-id' and value as 64 bit Span Id in hex digits string
+//
+// Additionally, any tags present in Span are also extracted to use as log fields e.g. device-id.
+//
+// If no Span is found associated with context, blank slice is returned without any log fields
+func (lfm *LogFeaturesManager) ExtractContextAttributes(ctx context.Context) []interface{} {
+	if !lfm.isLogCorrelationEnabled {
+		return make([]interface{}, 0)
+	}
+
+	attrMap := make(map[string]interface{})
+
+	if ctx != nil {
+		if span := opentracing.SpanFromContext(ctx); span != nil {
+			if jspan, ok := span.(*jtracing.Span); ok {
+				// Add Log fields for operation identified by Root Level Span (Trace)
+				opId := fmt.Sprintf("%016x", jspan.SpanContext().TraceID().Low) // Using Sprintf to avoid removal of leading 0s
+				opName := jspan.BaggageItem(RootSpanNameKey)
+
+				taskId := fmt.Sprintf("%016x", uint64(jspan.SpanContext().SpanID())) // Using Sprintf to avoid removal of leading 0s
+				taskName := jspan.OperationName()
+
+				if opName == "" {
+					span.SetBaggageItem(RootSpanNameKey, taskName)
+					opName = taskName
+				}
+
+				attrMap["op-id"] = opId
+				attrMap["op-name"] = opName
+
+				// Add Log fields for task identified by Current Span, if it is different
+				// than operation
+				if taskId != opId {
+					attrMap["task-id"] = taskId
+					attrMap["task-name"] = taskName
+				}
+
+				for k, v := range jspan.Tags() {
+					// Ignore the special tags added by Jaeger, middleware (sampler.type, span.*) present in the span
+					if strings.HasPrefix(k, "sampler.") || strings.HasPrefix(k, "span.") || k == "component" {
+						continue
+					}
+
+					attrMap[k] = v
+				}
+
+				processBaggageItems := func(k, v string) bool {
+					if k != "rpc-span-name" {
+						attrMap[k] = v
+					}
+					return true
+				}
+
+				jspan.SpanContext().ForeachBaggageItem(processBaggageItems)
+			}
+		}
+	}
+
+	return serializeMap(attrMap)
+}
+
+// Method to inject additional log fields into Span e.g. device-id
+func EnrichSpan(ctx context.Context, keyAndValues ...Fields) {
+	span := opentracing.SpanFromContext(ctx)
+	if span != nil {
+		if jspan, ok := span.(*jtracing.Span); ok {
+			// Inject as a BaggageItem when the Span is the Root Span so that it propagates
+			// across the components along with Root Span (called as Trace)
+			// Else, inject as a Tag so that it is attached to the Child Task
+			isRootSpan := false
+			if jspan.SpanContext().TraceID().String() == jspan.SpanContext().SpanID().String() {
+				isRootSpan = true
+			}
+
+			for _, field := range keyAndValues {
+				for k, v := range field {
+					if isRootSpan {
+						span.SetBaggageItem(k, v.(string))
+					} else {
+						span.SetTag(k, v)
+					}
+				}
+			}
+		}
+	}
+}
+
+// Method to inject Error into the Span in event of any operation failure
+func MarkSpanError(ctx context.Context, err error) {
+	span := opentracing.SpanFromContext(ctx)
+	if span != nil {
+		span.SetTag("error", true)
+		span.SetTag("err", err)
+	}
+}
+
+// Creates a Child Span from Parent Span embedded in passed context. Should be used before starting a new major
+// operation in Synchronous or Asynchronous mode (go routine), such as following:
+// 1. Start of all implemented External API methods unless using a interceptor for auto-injection of Span (Server side impl)
+// 2. Just before calling an Third-Party lib which is invoking a External API (etcd, kafka)
+// 3. In start of a Go Routine responsible for performing a major task involving significant duration
+// 4. Any method which is suspected to be time consuming...
+func CreateChildSpan(ctx context.Context, taskName string, keyAndValues ...Fields) (opentracing.Span, context.Context) {
+	if !GetGlobalLFM().GetLogCorrelationStatus() && !GetGlobalLFM().GetTracePublishingStatus() {
+		return opentracing.NoopTracer{}.StartSpan(taskName), ctx
+	}
+
+	parentSpan := opentracing.SpanFromContext(ctx)
+	childSpan, newCtx := opentracing.StartSpanFromContext(ctx, taskName)
+
+	if parentSpan == nil || parentSpan.BaggageItem(RootSpanNameKey) == "" {
+		childSpan.SetBaggageItem(RootSpanNameKey, taskName)
+	}
+
+	EnrichSpan(newCtx, keyAndValues...)
+	return childSpan, newCtx
+}
+
+// Creates a Async Child Span with Follows-From relationship from Parent Span embedded in passed context.
+// Should be used only in scenarios when
+// a) There is dis-continuation in execution and thus result of Child span does not affect the Parent flow at all
+// b) The execution of Child Span is guaranteed to start after the completion of Parent Span
+// In case of any confusion, use CreateChildSpan method
+// Some situations where this method would be suitable includes Kafka Async RPC call, Propagation of Event across
+// a channel etc.
+func CreateAsyncSpan(ctx context.Context, taskName string, keyAndValues ...Fields) (opentracing.Span, context.Context) {
+	if !GetGlobalLFM().GetLogCorrelationStatus() && !GetGlobalLFM().GetTracePublishingStatus() {
+		return opentracing.NoopTracer{}.StartSpan(taskName), ctx
+	}
+
+	var asyncSpan opentracing.Span
+	var newCtx context.Context
+
+	parentSpan := opentracing.SpanFromContext(ctx)
+
+	// We should always be creating Aysnc span from a Valid parent span. If not, create a Child span instead
+	if parentSpan == nil {
+		logger.Warn(context.Background(), "Async span must be created with a Valid parent span only")
+		asyncSpan, newCtx = opentracing.StartSpanFromContext(ctx, taskName)
+	} else {
+		// Use Background context as the base for Follows-from case; else new span is getting both Child and FollowsFrom relationship
+		asyncSpan, newCtx = opentracing.StartSpanFromContext(context.Background(), taskName, opentracing.FollowsFrom(parentSpan.Context()))
+	}
+
+	if parentSpan == nil || parentSpan.BaggageItem(RootSpanNameKey) == "" {
+		asyncSpan.SetBaggageItem(RootSpanNameKey, taskName)
+	}
+
+	EnrichSpan(newCtx, keyAndValues...)
+	return asyncSpan, newCtx
+}
+
+// Extracts the span from Source context and injects into the supplied Target context.
+// This should be used in situations wherein we are calling a time-sensitive operation (etcd update) and hence
+// had a context.Background() used earlier to avoid any cancellation/timeout of operation by passed context.
+// This will allow propagation of span with a different base context (and not the original context)
+func WithSpanFromContext(targetCtx, sourceCtx context.Context) context.Context {
+	span := opentracing.SpanFromContext(sourceCtx)
+	return opentracing.ContextWithSpan(targetCtx, span)
+}
+
+// Utility method to convert log Fields into array of interfaces expected by zap logger methods
+func serializeMap(fields Fields) []interface{} {
+	data := make([]interface{}, len(fields)*2)
+	i := 0
+	for k, v := range fields {
+		data[i] = k
+		data[i+1] = v
+		i = i + 2
+	}
+	return data
+}