feat(logger): add logger option to all micro components (override DefaultLogger) closes #2556 (#2559)

* feat(logger): add logger option to all components

* fix: refactor api/rpc.go

* fix: refactor api/stream.go

* fix: api/options.go comment

* fix(logger): do not use logger.Helper internally

* fix(logger): fix comments

* fix(logger): use level.Enabled method

* fix: rename mlogger to log

* fix: run go fmt

* fix: log level

* fix: factories

Co-authored-by: Mohamed MHAMDI <mmhamdi@hubside.com>
Co-authored-by: Davincible <david.brouwer.99@gmail.com>

api/handler/options.go

@@ -3,6 +3,7 @@ package handler
 import (
 	"go-micro.dev/v4/api/router"
 	"go-micro.dev/v4/client"
+	"go-micro.dev/v4/logger"
 )
 
 var (
@@ -14,13 +15,17 @@ type Options struct {
 	Namespace   string
 	Router      router.Router
 	Client      client.Client
+	Logger      logger.Logger
 }
 
 type Option func(o *Options)
 
 // NewOptions fills in the blanks
 func NewOptions(opts ...Option) Options {
-	var options Options
+	options := Options{
+		Logger: logger.DefaultLogger,
+	}
+
 	for _, o := range opts {
 		o(&options)
 	}
@@ -33,6 +38,10 @@ func NewOptions(opts ...Option) Options {
 		options.MaxRecvSize = DefaultMaxRecvSize
 	}
 
+	if options.Logger == nil {
+		options.Logger = logger.LoggerOrDefault(options.Logger)
+	}
+
 	return options
 }
 
@@ -56,9 +65,16 @@ func WithClient(c client.Client) Option {
 	}
 }
 
-// WithmaxRecvSize specifies max body size
+// WithMaxRecvSize specifies max body size
 func WithMaxRecvSize(size int64) Option {
 	return func(o *Options) {
 		o.MaxRecvSize = size
 	}
 }
+
+// WithLogger specifies the logger
+func WithLogger(l logger.Logger) Option {
+	return func(o *Options) {
+		o.Logger = l
+	}
+}

api/handler/rpc/rpc.go

@@ -11,6 +11,7 @@ import (
 
 	jsonpatch "github.com/evanphx/json-patch/v5"
 	"github.com/oxtoacart/bpool"
+
 	"go-micro.dev/v4/api/handler"
 	"go-micro.dev/v4/api/internal/proto"
 	"go-micro.dev/v4/api/router"
@@ -19,7 +20,7 @@ import (
 	"go-micro.dev/v4/codec/jsonrpc"
 	"go-micro.dev/v4/codec/protorpc"
 	"go-micro.dev/v4/errors"
-	"go-micro.dev/v4/logger"
+	log "go-micro.dev/v4/logger"
 	"go-micro.dev/v4/metadata"
 	"go-micro.dev/v4/registry"
 	"go-micro.dev/v4/selector"
@@ -29,6 +30,7 @@ import (
 
 const (
 	Handler   = "rpc"
+	packageID = "go.micro.api"
 )
 
 var (
@@ -73,6 +75,7 @@ func strategy(services []*registry.Service) selector.Strategy {
 }
 
 func (h *rpcHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	logger := h.opts.Logger
 	bsize := handler.DefaultMaxRecvSize
 	if h.opts.MaxRecvSize > 0 {
 		bsize = h.opts.MaxRecvSize
@@ -87,13 +90,19 @@ func (h *rpcHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		// try get service from router
 		s, err := h.opts.Router.Route(r)
 		if err != nil {
-			writeError(w, r, errors.InternalServerError("go.micro.api", err.Error()))
+			werr := writeError(w, r, errors.InternalServerError(packageID, err.Error()))
+			if werr != nil {
+				logger.Log(log.ErrorLevel, werr)
+			}
 			return
 		}
 		service = s
 	} else {
 		// we have no way of routing the request
-		writeError(w, r, errors.InternalServerError("go.micro.api", "no route found"))
+		werr := writeError(w, r, errors.InternalServerError(packageID, "no route found"))
+		if werr != nil {
+			logger.Log(log.ErrorLevel, werr)
+		}
 		return
 	}
 
@@ -133,7 +142,9 @@ func (h *rpcHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		// drop older context as it can have timeouts and create new
 		//		md, _ := metadata.FromContext(cx)
 		//serveWebsocket(context.TODO(), w, r, service, c)
-		serveWebsocket(cx, w, r, service, c)
+		if err := serveWebsocket(cx, w, r, service, c); err != nil {
+			logger.Log(log.ErrorLevel, err)
+		}
 		return
 	}
 
@@ -144,7 +155,9 @@ func (h *rpcHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	// get payload
 	br, err := requestPayload(r)
 	if err != nil {
-		writeError(w, r, err)
+		if werr := writeError(w, r, err); werr != nil {
+			logger.Log(log.ErrorLevel, werr)
+		}
 		return
 	}
 
@@ -171,14 +184,18 @@ func (h *rpcHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 
 		// make the call
 		if err := c.Call(cx, req, response, client.WithSelectOption(so)); err != nil {
-			writeError(w, r, err)
+			if werr := writeError(w, r, err); werr != nil {
+				logger.Log(log.ErrorLevel, werr)
+			}
 			return
 		}
 
 		// marshall response
 		rsp, err = response.Marshal()
 		if err != nil {
-			writeError(w, r, err)
+			if werr := writeError(w, r, err); werr != nil {
+				logger.Log(log.ErrorLevel, werr)
+			}
 			return
 		}
 
@@ -206,20 +223,26 @@ func (h *rpcHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		)
 		// make the call
 		if err := c.Call(cx, req, &response, client.WithSelectOption(so)); err != nil {
-			writeError(w, r, err)
+			if werr := writeError(w, r, err); werr != nil {
+				logger.Log(log.ErrorLevel, werr)
+			}
 			return
 		}
 
 		// marshall response
 		rsp, err = response.MarshalJSON()
 		if err != nil {
-			writeError(w, r, err)
+			if werr := writeError(w, r, err); werr != nil {
+				logger.Log(log.ErrorLevel, werr)
+			}
 			return
 		}
 	}
 
 	// write the response
-	writeResponse(w, r, rsp)
+	if err := writeResponse(w, r, rsp); err != nil {
+		logger.Log(log.ErrorLevel, err)
+	}
 }
 
 func (rh *rpcHandler) String() string {
@@ -275,7 +298,9 @@ func requestPayload(r *http.Request) ([]byte, error) {
 		}
 		return raw.Marshal()
 	case strings.Contains(ct, "application/www-x-form-urlencoded"):
-		r.ParseForm()
+		if err := r.ParseForm(); err != nil {
+			return nil, err
+		}
 
 		// generate a new set of values from the form
 		vals := make(map[string]string)
@@ -441,14 +466,14 @@ func requestPayload(r *http.Request) ([]byte, error) {
 	return []byte{}, nil
 }
 
-func writeError(w http.ResponseWriter, r *http.Request, err error) {
+func writeError(w http.ResponseWriter, r *http.Request, err error) error {
 	ce := errors.Parse(err.Error())
 
 	switch ce.Code {
 	case 0:
 		// assuming it's totally screwed
 		ce.Code = 500
-		ce.Id = "go.micro.api"
+		ce.Id = packageID
 		ce.Status = http.StatusText(500)
 		ce.Detail = "error during request: " + ce.Detail
 		w.WriteHeader(500)
@@ -468,14 +493,10 @@ func writeError(w http.ResponseWriter, r *http.Request, err error) {
 	}
 
 	_, werr := w.Write([]byte(ce.Error()))
-	if werr != nil {
+	return werr
-		if logger.V(logger.ErrorLevel, logger.DefaultLogger) {
-			logger.Error(werr)
-		}
-	}
 }
 
-func writeResponse(w http.ResponseWriter, r *http.Request, rsp []byte) {
+func writeResponse(w http.ResponseWriter, r *http.Request, rsp []byte) error {
 	w.Header().Set("Content-Type", r.Header.Get("Content-Type"))
 	w.Header().Set("Content-Length", strconv.Itoa(len(rsp)))
 
@@ -494,12 +515,7 @@ func writeResponse(w http.ResponseWriter, r *http.Request, rsp []byte) {
 
 	// write response
 	_, err := w.Write(rsp)
-	if err != nil {
+	return err
-		if logger.V(logger.ErrorLevel, logger.DefaultLogger) {
-			logger.Error(err)
-		}
-	}
-
 }
 
 func NewHandler(opts ...handler.Option) handler.Handler {

api/handler/rpc/stream.go

@@ -12,15 +12,15 @@ import (
 	"github.com/gobwas/httphead"
 	"github.com/gobwas/ws"
 	"github.com/gobwas/ws/wsutil"
+
 	"go-micro.dev/v4/api/router"
 	"go-micro.dev/v4/client"
 	raw "go-micro.dev/v4/codec/bytes"
-	"go-micro.dev/v4/logger"
 	"go-micro.dev/v4/selector"
 )
 
 // serveWebsocket will stream rpc back over websockets assuming json
-func serveWebsocket(ctx context.Context, w http.ResponseWriter, r *http.Request, service *router.Route, c client.Client) {
+func serveWebsocket(ctx context.Context, w http.ResponseWriter, r *http.Request, service *router.Route, c client.Client) (err error) {
 	var op ws.OpCode
 
 	ct := r.Header.Get("Content-Type")
@@ -49,9 +49,6 @@ func serveWebsocket(ctx context.Context, w http.ResponseWriter, r *http.Request,
 	}
 	payload, err := requestPayload(r)
 	if err != nil {
-		if logger.V(logger.ErrorLevel, logger.DefaultLogger) {
-			logger.Error(err)
-		}
 		return
 	}
 
@@ -72,18 +69,12 @@ func serveWebsocket(ctx context.Context, w http.ResponseWriter, r *http.Request,
 
 	conn, rw, _, err := upgrader.Upgrade(r, w)
 	if err != nil {
-		if logger.V(logger.ErrorLevel, logger.DefaultLogger) {
-			logger.Error(err)
-		}
 		return
 	}
 
 	defer func() {
-		if err := conn.Close(); err != nil {
+		if cErr := conn.Close(); cErr != nil && err == nil {
-			if logger.V(logger.ErrorLevel, logger.DefaultLogger) {
+			err = cErr
-				logger.Error(err)
-			}
-			return
 		}
 	}()
 
@@ -114,22 +105,20 @@ func serveWebsocket(ctx context.Context, w http.ResponseWriter, r *http.Request,
 	// create a new stream
 	stream, err := c.Stream(ctx, req, client.WithSelectOption(so))
 	if err != nil {
-		if logger.V(logger.ErrorLevel, logger.DefaultLogger) {
-			logger.Error(err)
-		}
 		return
 	}
 
 	if request != nil {
 		if err = stream.Send(request); err != nil {
-			if logger.V(logger.ErrorLevel, logger.DefaultLogger) {
-				logger.Error(err)
-			}
 			return
 		}
 	}
 
-	go writeLoop(rw, stream)
+	go func() {
+		if wErr := writeLoop(rw, stream); wErr != nil && err == nil {
+			err = wErr
+		}
+	}()
 
 	rsp := stream.Response()
 
@@ -137,49 +126,40 @@ func serveWebsocket(ctx context.Context, w http.ResponseWriter, r *http.Request,
 	for {
 		select {
 		case <-ctx.Done():
-			return
+			return nil
 		case <-stream.Context().Done():
-			return
+			return nil
 		default:
 			// read backend response body
 			buf, err := rsp.Read()
 			if err != nil {
 				// wants to avoid import  grpc/status.Status
 				if strings.Contains(err.Error(), "context canceled") {
-					return
+					return nil
 				}
-				if logger.V(logger.ErrorLevel, logger.DefaultLogger) {
+				return err
-					logger.Error(err)
-				}
-				return
 			}
 
 			// write the response
-			if err := wsutil.WriteServerMessage(rw, op, buf); err != nil {
+			if err = wsutil.WriteServerMessage(rw, op, buf); err != nil {
-				if logger.V(logger.ErrorLevel, logger.DefaultLogger) {
+				return err
-					logger.Error(err)
-				}
-				return
 			}
 			if err = rw.Flush(); err != nil {
-				if logger.V(logger.ErrorLevel, logger.DefaultLogger) {
+				return err
-					logger.Error(err)
-				}
-				return
 			}
 		}
 	}
 }
 
 // writeLoop
-func writeLoop(rw io.ReadWriter, stream client.Stream) {
+func writeLoop(rw io.ReadWriter, stream client.Stream) error {
 	// close stream when done
 	defer stream.Close()
 
 	for {
 		select {
 		case <-stream.Context().Done():
-			return
+			return nil
 		default:
 			buf, op, err := wsutil.ReadClientData(rw)
 			if err != nil {
@@ -187,16 +167,13 @@ func writeLoop(rw io.ReadWriter, stream client.Stream) {
 					switch wserr.Code {
 					case ws.StatusGoingAway:
 						// this happens when user leave the page
-						return
+						return nil
 					case ws.StatusNormalClosure, ws.StatusNoStatusRcvd:
 						// this happens when user close ws connection, or we don't get any status
-						return
+						return nil
 					}
 				}
-				if logger.V(logger.ErrorLevel, logger.DefaultLogger) {
+				return err
-					logger.Error(err)
-				}
-				return
 			}
 			switch op {
 			default:
@@ -210,10 +187,7 @@ func writeLoop(rw io.ReadWriter, stream client.Stream) {
 			// if the extracted payload isn't empty lets use it
 			request := &raw.Frame{Data: buf}
 			if err := stream.Send(request); err != nil {
-				if logger.V(logger.ErrorLevel, logger.DefaultLogger) {
+				return err
-					logger.Error(err)
-				}
-				return
 			}
 		}
 	}

api/router/options.go

@@ -3,6 +3,7 @@ package router
 import (
 	"go-micro.dev/v4/api/resolver"
 	"go-micro.dev/v4/api/resolver/vpath"
+	"go-micro.dev/v4/logger"
 	"go-micro.dev/v4/registry"
 )
 
@@ -10,6 +11,7 @@ type Options struct {
 	Handler  string
 	Registry registry.Registry
 	Resolver resolver.Resolver
+	Logger   logger.Logger
 }
 
 type Option func(o *Options)
@@ -18,6 +20,7 @@ func NewOptions(opts ...Option) Options {
 	options := Options{
 		Handler:  "meta",
 		Registry: registry.DefaultRegistry,
+		Logger:   logger.DefaultLogger,
 	}
 
 	for _, o := range opts {
@@ -50,3 +53,10 @@ func WithResolver(r resolver.Resolver) Option {
 		o.Resolver = r
 	}
 }
+
+// WithLogger sets the underline logger
+func WithLogger(l logger.Logger) Option {
+	return func(o *Options) {
+		o.Logger = l
+	}
+}

api/router/registry/registry.go

@@ -12,7 +12,7 @@ import (
 
 	"go-micro.dev/v4/api/router"
 	"go-micro.dev/v4/api/router/util"
-	"go-micro.dev/v4/logger"
+	log "go-micro.dev/v4/logger"
 	"go-micro.dev/v4/metadata"
 	"go-micro.dev/v4/registry"
 	"go-micro.dev/v4/registry/cache"
@@ -51,14 +51,13 @@ func (r *registryRouter) isStopped() bool {
 // refresh list of api services
 func (r *registryRouter) refresh() {
 	var attempts int
+	logger := r.Options().Logger
 
 	for {
 		services, err := r.opts.Registry.ListServices()
 		if err != nil {
 			attempts++
-			if logger.V(logger.ErrorLevel, logger.DefaultLogger) {
+			logger.Logf(log.ErrorLevel, "unable to list services: %v", err)
-				logger.Errorf("unable to list services: %v", err)
-			}
 			time.Sleep(time.Duration(attempts) * time.Second)
 			continue
 		}
@@ -69,9 +68,7 @@ func (r *registryRouter) refresh() {
 		for _, s := range services {
 			service, err := r.rc.GetService(s.Name)
 			if err != nil {
-				if logger.V(logger.ErrorLevel, logger.DefaultLogger) {
+				logger.Logf(log.ErrorLevel, "unable to get service: %v", err)
-					logger.Errorf("unable to get service: %v", err)
-				}
 				continue
 			}
 			r.store(service)
@@ -89,6 +86,7 @@ func (r *registryRouter) refresh() {
 
 // process watch event
 func (r *registryRouter) process(res *registry.Result) {
+	logger := r.Options().Logger
 	// skip these things
 	if res == nil || res.Service == nil {
 		return
@@ -97,9 +95,7 @@ func (r *registryRouter) process(res *registry.Result) {
 	// get entry from cache
 	service, err := r.rc.GetService(res.Service.Name)
 	if err != nil {
-		if logger.V(logger.ErrorLevel, logger.DefaultLogger) {
+		logger.Logf(log.ErrorLevel, "unable to get service: %v", err)
-			logger.Errorf("unable to get service: %v", err)
-		}
 		return
 	}
 
@@ -109,6 +105,7 @@ func (r *registryRouter) process(res *registry.Result) {
 
 // store local endpoint cache
 func (r *registryRouter) store(services []*registry.Service) {
+	logger := r.Options().Logger
 	// endpoints
 	eps := map[string]*router.Route{}
 
@@ -129,9 +126,7 @@ func (r *registryRouter) store(services []*registry.Service) {
 
 			// if we got nothing skip
 			if err := router.Validate(end); err != nil {
-				if logger.V(logger.TraceLevel, logger.DefaultLogger) {
+				logger.Logf(log.TraceLevel, "endpoint validation failed: %v", err)
-					logger.Tracef("endpoint validation failed: %v", err)
-				}
 				continue
 			}
 
@@ -176,9 +171,7 @@ func (r *registryRouter) store(services []*registry.Service) {
 			}
 			hostreg, err := regexp.CompilePOSIX(h)
 			if err != nil {
-				if logger.V(logger.TraceLevel, logger.DefaultLogger) {
+				logger.Logf(log.TraceLevel, "endpoint have invalid host regexp: %v", err)
-					logger.Tracef("endpoint have invalid host regexp: %v", err)
-				}
 				continue
 			}
 			cep.hostregs = append(cep.hostregs, hostreg)
@@ -197,20 +190,16 @@ func (r *registryRouter) store(services []*registry.Service) {
 
 			rule, err := util.Parse(p)
 			if err != nil && !pcreok {
-				if logger.V(logger.TraceLevel, logger.DefaultLogger) {
+				logger.Logf(log.TraceLevel, "endpoint have invalid path pattern: %v", err)
-					logger.Tracef("endpoint have invalid path pattern: %v", err)
-				}
 				continue
 			} else if err != nil && pcreok {
 				continue
 			}
 
 			tpl := rule.Compile()
-			pathreg, err := util.NewPattern(tpl.Version, tpl.OpCodes, tpl.Pool, "")
+			pathreg, err := util.NewPattern(tpl.Version, tpl.OpCodes, tpl.Pool, "", util.PatternLogger(logger))
 			if err != nil {
-				if logger.V(logger.TraceLevel, logger.DefaultLogger) {
+				logger.Logf(log.TraceLevel, "endpoint have invalid path pattern: %v", err)
-					logger.Tracef("endpoint have invalid path pattern: %v", err)
-				}
 				continue
 			}
 			cep.pathregs = append(cep.pathregs, pathreg)
@@ -223,6 +212,7 @@ func (r *registryRouter) store(services []*registry.Service) {
 // watch for endpoint changes
 func (r *registryRouter) watch() {
 	var attempts int
+	logger := r.Options().Logger
 
 	for {
 		if r.isStopped() {
@@ -233,9 +223,7 @@ func (r *registryRouter) watch() {
 		w, err := r.opts.Registry.Watch()
 		if err != nil {
 			attempts++
-			if logger.V(logger.ErrorLevel, logger.DefaultLogger) {
+			logger.Logf(log.ErrorLevel, "error watching endpoints: %v", err)
-				logger.Errorf("error watching endpoints: %v", err)
-			}
 			time.Sleep(time.Duration(attempts) * time.Second)
 			continue
 		}
@@ -258,9 +246,7 @@ func (r *registryRouter) watch() {
 			// process next event
 			res, err := w.Next()
 			if err != nil {
-				if logger.V(logger.ErrorLevel, logger.DefaultLogger) {
+				logger.Logf(log.ErrorLevel, "error getting next endoint: %v", err)
-					logger.Errorf("error getting next endoint: %v", err)
-				}
 				close(ch)
 				break
 			}
@@ -293,6 +279,7 @@ func (r *registryRouter) Deregister(ep *router.Route) error {
 }
 
 func (r *registryRouter) Endpoint(req *http.Request) (*router.Route, error) {
+	logger := r.Options().Logger
 	if r.isStopped() {
 		return nil, errors.New("router closed")
 	}
@@ -325,9 +312,8 @@ func (r *registryRouter) Endpoint(req *http.Request) (*router.Route, error) {
 		if !mMatch {
 			continue
 		}
-		if logger.V(logger.DebugLevel, logger.DefaultLogger) {
+
-			logger.Debugf("api method match %s", req.Method)
+		logger.Logf(log.DebugLevel, "api method match %s", req.Method)
-		}
 
 		// 2. try host
 		if len(ep.Host) == 0 {
@@ -348,22 +334,17 @@ func (r *registryRouter) Endpoint(req *http.Request) (*router.Route, error) {
 		if !hMatch {
 			continue
 		}
-		if logger.V(logger.DebugLevel, logger.DefaultLogger) {
+
-			logger.Debugf("api host match %s", req.URL.Host)
+		logger.Logf(log.DebugLevel, "api host match %s", req.URL.Host)
-		}
 
 		// 3. try path via google.api path matching
 		for _, pathreg := range cep.pathregs {
 			matches, err := pathreg.Match(path, "")
 			if err != nil {
-				if logger.V(logger.DebugLevel, logger.DefaultLogger) {
+				logger.Logf(log.DebugLevel, "api gpath not match %s != %v", path, pathreg)
-					logger.Debugf("api gpath not match %s != %v", path, pathreg)
-				}
 				continue
 			}
-			if logger.V(logger.DebugLevel, logger.DefaultLogger) {
+			logger.Logf(log.DebugLevel, "api gpath match %s = %v", path, pathreg)
-				logger.Debugf("api gpath match %s = %v", path, pathreg)
-			}
 			pMatch = true
 			ctx := req.Context()
 			md, ok := metadata.FromContext(ctx)
@@ -381,14 +362,10 @@ func (r *registryRouter) Endpoint(req *http.Request) (*router.Route, error) {
 			// 4. try path via pcre path matching
 			for _, pathreg := range cep.pcreregs {
 				if !pathreg.MatchString(req.URL.Path) {
-					if logger.V(logger.DebugLevel, logger.DefaultLogger) {
+					logger.Logf(log.DebugLevel, "api pcre path not match %s != %v", path, pathreg)
-						logger.Debugf("api pcre path not match %s != %v", path, pathreg)
-					}
 					continue
 				}
-				if logger.V(logger.DebugLevel, logger.DefaultLogger) {
+				logger.Logf(log.DebugLevel, "api pcre path match %s != %v", path, pathreg)
-					logger.Debugf("api pcre path match %s != %v", path, pathreg)
-				}
 				pMatch = true
 				break
 			}

api/router/static/static.go

@@ -10,7 +10,7 @@ import (
 
 	"go-micro.dev/v4/api/router"
 	"go-micro.dev/v4/api/router/util"
-	"go-micro.dev/v4/logger"
+	log "go-micro.dev/v4/logger"
 	"go-micro.dev/v4/metadata"
 	"go-micro.dev/v4/registry"
 	rutil "go-micro.dev/v4/util/registry"
@@ -129,7 +129,7 @@ func (r *staticRouter) Register(route *router.Route) error {
 		}
 
 		tpl := rule.Compile()
-		pathreg, err := util.NewPattern(tpl.Version, tpl.OpCodes, tpl.Pool, "")
+		pathreg, err := util.NewPattern(tpl.Version, tpl.OpCodes, tpl.Pool, "", util.PatternLogger(r.Options().Logger))
 		if err != nil {
 			return err
 		}
@@ -222,6 +222,7 @@ func (r *staticRouter) Endpoint(req *http.Request) (*router.Route, error) {
 }
 
 func (r *staticRouter) endpoint(req *http.Request) (*endpoint, error) {
+	logger := r.Options().Logger
 	if r.isStopd() {
 		return nil, errors.New("router closed")
 	}
@@ -250,9 +251,7 @@ func (r *staticRouter) endpoint(req *http.Request) (*endpoint, error) {
 		if !mMatch {
 			continue
 		}
-		if logger.V(logger.DebugLevel, logger.DefaultLogger) {
+		logger.Logf(log.DebugLevel, "api method match %s", req.Method)
-			logger.Debugf("api method match %s", req.Method)
-		}
 
 		// 2. try host
 		if len(ep.apiep.Host) == 0 {
@@ -273,22 +272,16 @@ func (r *staticRouter) endpoint(req *http.Request) (*endpoint, error) {
 		if !hMatch {
 			continue
 		}
-		if logger.V(logger.DebugLevel, logger.DefaultLogger) {
+		logger.Logf(log.DebugLevel, "api host match %s", req.URL.Host)
-			logger.Debugf("api host match %s", req.URL.Host)
-		}
 
 		// 3. try google.api path
 		for _, pathreg := range ep.pathregs {
 			matches, err := pathreg.Match(path, "")
 			if err != nil {
-				if logger.V(logger.DebugLevel, logger.DefaultLogger) {
+				logger.Logf(log.DebugLevel, "api gpath not match %s != %v", path, pathreg)
-					logger.Debugf("api gpath not match %s != %v", path, pathreg)
-				}
 				continue
 			}
-			if logger.V(logger.DebugLevel, logger.DefaultLogger) {
+			logger.Logf(log.DebugLevel, "api gpath match %s = %v", path, pathreg)
-				logger.Debugf("api gpath match %s = %v", path, pathreg)
-			}
 			pMatch = true
 			ctx := req.Context()
 			md, ok := metadata.FromContext(ctx)
@@ -306,9 +299,7 @@ func (r *staticRouter) endpoint(req *http.Request) (*endpoint, error) {
 			// 4. try path via pcre path matching
 			for _, pathreg := range ep.pcreregs {
 				if !pathreg.MatchString(req.URL.Path) {
-					if logger.V(logger.DebugLevel, logger.DefaultLogger) {
+					logger.Logf(log.DebugLevel, "api pcre path not match %s != %v", req.URL.Path, pathreg)
-						logger.Debugf("api pcre path not match %s != %v", req.URL.Path, pathreg)
-					}
 					continue
 				}
 				pMatch = true

api/router/util/parse.go

@@ -6,7 +6,7 @@ import (
 	"fmt"
 	"strings"
 
-	"go-micro.dev/v4/logger"
+	log "go-micro.dev/v4/logger"
 )
 
 // InvalidTemplateError indicates that the path template is not valid.
@@ -98,38 +98,36 @@ func tokenize(path string) (tokens []string, verb string) {
 type parser struct {
 	tokens   []string
 	accepted []string
+	logger   log.Logger
 }
 
 // topLevelSegments is the target of this parser.
 func (p *parser) topLevelSegments() ([]segment, error) {
-	if logger.V(logger.DebugLevel, logger.DefaultLogger) {
+	logger := log.LoggerOrDefault(p.logger)
-		logger.Debugf("Parsing %q", p.tokens)
+
-	}
+	logger.Logf(log.DebugLevel, "Parsing %q", p.tokens)
+
 	segs, err := p.segments()
 	if err != nil {
 		return nil, err
 	}
-	if logger.V(logger.DebugLevel, logger.DefaultLogger) {
+	logger.Logf(log.DebugLevel, "accept segments: %q; %q", p.accepted, p.tokens)
-		logger.Debugf("accept segments: %q; %q", p.accepted, p.tokens)
-	}
 	if _, err := p.accept(typeEOF); err != nil {
 		return nil, fmt.Errorf("unexpected token %q after segments %q", p.tokens[0], strings.Join(p.accepted, ""))
 	}
-	if logger.V(logger.DebugLevel, logger.DefaultLogger) {
+	logger.Logf(log.DebugLevel, "accept eof: %q; %q", p.accepted, p.tokens)
-		logger.Debugf("accept eof: %q; %q", p.accepted, p.tokens)
-	}
 	return segs, nil
 }
 
 func (p *parser) segments() ([]segment, error) {
+	logger := log.LoggerOrDefault(p.logger)
 	s, err := p.segment()
 	if err != nil {
 		return nil, err
 	}
 
-	if logger.V(logger.DebugLevel, logger.DefaultLogger) {
+	logger.Logf(log.DebugLevel, "accept segment: %q; %q", p.accepted, p.tokens)
-		logger.Debugf("accept segment: %q; %q", p.accepted, p.tokens)
+
-	}
 	segs := []segment{s}
 	for {
 		if _, err := p.accept("/"); err != nil {
@@ -140,9 +138,7 @@ func (p *parser) segments() ([]segment, error) {
 			return segs, err
 		}
 		segs = append(segs, s)
-		if logger.V(logger.DebugLevel, logger.DefaultLogger) {
+		logger.Logf(log.DebugLevel, "accept segment: %q; %q", p.accepted, p.tokens)
-			logger.Debugf("accept segment: %q; %q", p.accepted, p.tokens)
-		}
 	}
 }
 
@@ -270,6 +266,7 @@ func (p *parser) accept(term termType) (string, error) {
 // expectPChars determines if "t" consists of only pchars defined in RFC3986.
 //
 // https://www.ietf.org/rfc/rfc3986.txt, P.49
+//
 //	pchar         = unreserved / pct-encoded / sub-delims / ":" / "@"
 //	unreserved    = ALPHA / DIGIT / "-" / "." / "_" / "~"
 //	sub-delims    = "!" / "$" / "&" / "'" / "(" / ")"

api/router/util/runtime.go

@@ -7,7 +7,7 @@ import (
 	"fmt"
 	"strings"
 
-	"go-micro.dev/v4/logger"
+	log "go-micro.dev/v4/logger"
 )
 
 var (
@@ -43,11 +43,19 @@ type Pattern struct {
 
 type patternOptions struct {
 	assumeColonVerb bool
+	logger          log.Logger
 }
 
 // PatternOpt is an option for creating Patterns.
 type PatternOpt func(*patternOptions)
 
+// Logger sets the logger
+func PatternLogger(l log.Logger) PatternOpt {
+	return func(po *patternOptions) {
+		po.logger = l
+	}
+}
+
 // NewPattern returns a new Pattern from the given definition values.
 // "ops" is a sequence of op codes. "pool" is a constant pool.
 // "verb" is the verb part of the pattern. It is empty if the pattern does not have the part.
@@ -61,18 +69,16 @@ func NewPattern(version int, ops []int, pool []string, verb string, opts ...Patt
 		o(&options)
 	}
 
+	logger := log.LoggerOrDefault(options.logger)
+
 	if version != 1 {
-		if logger.V(logger.DebugLevel, logger.DefaultLogger) {
+		logger.Logf(log.DebugLevel, "unsupported version: %d", version)
-			logger.Debugf("unsupported version: %d", version)
-		}
 		return Pattern{}, ErrInvalidPattern
 	}
 
 	l := len(ops)
 	if l%2 != 0 {
-		if logger.V(logger.DebugLevel, logger.DefaultLogger) {
+		logger.Logf(log.DebugLevel, "odd number of ops codes: %d", l)
-			logger.Debugf("odd number of ops codes: %d", l)
-		}
 		return Pattern{}, ErrInvalidPattern
 	}
 
@@ -95,18 +101,14 @@ func NewPattern(version int, ops []int, pool []string, verb string, opts ...Patt
 			stack++
 		case OpPushM:
 			if pushMSeen {
-				if logger.V(logger.DebugLevel, logger.DefaultLogger) {
+				logger.Logf(log.DebugLevel, "pushM appears twice")
-					logger.Debug("pushM appears twice")
-				}
 				return Pattern{}, ErrInvalidPattern
 			}
 			pushMSeen = true
 			stack++
 		case OpLitPush:
 			if op.operand < 0 || len(pool) <= op.operand {
-				if logger.V(logger.DebugLevel, logger.DefaultLogger) {
+				logger.Logf(log.DebugLevel, "negative literal index: %d", op.operand)
-					logger.Debugf("negative literal index: %d", op.operand)
-				}
 				return Pattern{}, ErrInvalidPattern
 			}
 			if pushMSeen {
@@ -115,24 +117,18 @@ func NewPattern(version int, ops []int, pool []string, verb string, opts ...Patt
 			stack++
 		case OpConcatN:
 			if op.operand <= 0 {
-				if logger.V(logger.DebugLevel, logger.DefaultLogger) {
+				logger.Logf(log.DebugLevel, "negative concat size: %d", op.operand)
-					logger.Debugf("negative concat size: %d", op.operand)
-				}
 				return Pattern{}, ErrInvalidPattern
 			}
 			stack -= op.operand
 			if stack < 0 {
-				if logger.V(logger.DebugLevel, logger.DefaultLogger) {
+				logger.Logf(log.DebugLevel, "stack underflow")
-					logger.Debug("stack underflow")
-				}
 				return Pattern{}, ErrInvalidPattern
 			}
 			stack++
 		case OpCapture:
 			if op.operand < 0 || len(pool) <= op.operand {
-				if logger.V(logger.DebugLevel, logger.DefaultLogger) {
+				logger.Logf(log.DebugLevel, "variable name index out of bound: %d", op.operand)
-					logger.Debugf("variable name index out of bound: %d", op.operand)
-				}
 				return Pattern{}, ErrInvalidPattern
 			}
 			v := pool[op.operand]
@@ -140,15 +136,11 @@ func NewPattern(version int, ops []int, pool []string, verb string, opts ...Patt
 			vars = append(vars, v)
 			stack--
 			if stack < 0 {
-				if logger.V(logger.DebugLevel, logger.DefaultLogger) {
+				logger.Logf(log.DebugLevel, "stack underflow")
-					logger.Debug("stack underflow")
-				}
 				return Pattern{}, ErrInvalidPattern
 			}
 		default:
-			if logger.V(logger.DebugLevel, logger.DefaultLogger) {
+			logger.Logf(log.DebugLevel, "invalid opcode: %d", op.code)
-				logger.Debugf("invalid opcode: %d", op.code)
-			}
 			return Pattern{}, ErrInvalidPattern
 		}
 
@@ -171,9 +163,7 @@ func NewPattern(version int, ops []int, pool []string, verb string, opts ...Patt
 // MustPattern is a helper function which makes it easier to call NewPattern in variable initialization.
 func MustPattern(p Pattern, err error) Pattern {
 	if err != nil {
-		if logger.V(logger.DebugLevel, logger.DefaultLogger) {
+		log.Logf(log.FatalLevel, "Pattern initialization failed: %v", err)
-			logger.Fatalf("Pattern initialization failed: %v", err)
-		}
 	}
 	return p
 }

api/server/acme/autocert/autocert.go

@@ -7,13 +7,16 @@ import (
 	"net"
 	"os"
 
-	"go-micro.dev/v4/api/server/acme"
-	"go-micro.dev/v4/logger"
 	"golang.org/x/crypto/acme/autocert"
+
+	"go-micro.dev/v4/api/server/acme"
+	log "go-micro.dev/v4/logger"
 )
 
 // autoCertACME is the ACME provider from golang.org/x/crypto/acme/autocert
-type autocertProvider struct{}
+type autocertProvider struct {
+	logger log.Logger
+}
 
 // Listen implements acme.Provider
 func (a *autocertProvider) Listen(hosts ...string) (net.Listener, error) {
@@ -22,6 +25,7 @@ func (a *autocertProvider) Listen(hosts ...string) (net.Listener, error) {
 
 // TLSConfig returns a new tls config
 func (a *autocertProvider) TLSConfig(hosts ...string) (*tls.Config, error) {
+	logger := log.LoggerOrDefault(a.logger)
 	// create a new manager
 	m := &autocert.Manager{
 		Prompt: autocert.AcceptTOS,
@@ -31,9 +35,7 @@ func (a *autocertProvider) TLSConfig(hosts ...string) (*tls.Config, error) {
 	}
 	dir := cacheDir()
 	if err := os.MkdirAll(dir, 0700); err != nil {
-		if logger.V(logger.InfoLevel, logger.DefaultLogger) {
+		logger.Logf(log.InfoLevel, "warning: autocert not using a cache: %v", err)
-			logger.Infof("warning: autocert not using a cache: %v", err)
-		}
 	} else {
 		m.Cache = autocert.DirCache(dir)
 	}

api/server/acme/options.go

@@ -1,6 +1,10 @@
 package acme
 
-import "github.com/go-acme/lego/v4/challenge"
+import (
+	"github.com/go-acme/lego/v4/challenge"
+
+	"go-micro.dev/v4/logger"
+)
 
 // Option (or Options) are passed to New() to configure providers
 type Option func(o *Options)
@@ -22,6 +26,9 @@ type Options struct {
 	// there's no defined interface, so if you consume this option
 	// sanity check it before using.
 	Cache interface{}
+
+	// Logger is the underling logging framework
+	Logger logger.Logger
 }
 
 // AcceptToS indicates whether you accept your CA's terms of service
@@ -63,6 +70,13 @@ func Cache(c interface{}) Option {
 	}
 }
 
+// Logger sets the underline logger
+func Logger(l logger.Logger) Option {
+	return func(o *Options) {
+		o.Logger = l
+	}
+}
+
 // DefaultOptions uses the Let's Encrypt Production CA, with DNS Challenge disabled.
 func DefaultOptions() Options {
 	return Options{

api/server/http/http.go

@@ -9,9 +9,10 @@ import (
 	"sync"
 
 	"github.com/gorilla/handlers"
+
 	"go-micro.dev/v4/api/server"
 	"go-micro.dev/v4/api/server/cors"
-	"go-micro.dev/v4/logger"
+	log "go-micro.dev/v4/logger"
 )
 
 type httpServer struct {
@@ -24,10 +25,7 @@ type httpServer struct {
 }
 
 func NewServer(address string, opts ...server.Option) server.Server {
-	var options server.Options
+	options := server.NewOptions(opts...)
-	for _, o := range opts {
-		o(&options)
-	}
 
 	return &httpServer{
 		opts:    options,
@@ -70,6 +68,7 @@ func (s *httpServer) Handle(path string, handler http.Handler) {
 }
 
 func (s *httpServer) Start() error {
+	logger := s.opts.Logger
 	var l net.Listener
 	var err error
 
@@ -86,9 +85,7 @@ func (s *httpServer) Start() error {
 		return err
 	}
 
-	if logger.V(logger.InfoLevel, logger.DefaultLogger) {
+	logger.Logf(log.InfoLevel, "HTTP API Listening on %s", l.Addr().String())
-		logger.Infof("HTTP API Listening on %s", l.Addr().String())
-	}
 
 	s.mtx.Lock()
 	s.address = l.Addr().String()
@@ -97,7 +94,8 @@ func (s *httpServer) Start() error {
 	go func() {
 		if err := http.Serve(l, s.mux); err != nil {
 			// temporary fix
-			//logger.Fatal(err)
+			//logger.Log(log.FatalLevel, err)
+			logger.Log(log.ErrorLevel, err)
 		}
 	}()
 

api/server/options.go

@@ -2,9 +2,11 @@ package server
 
 import (
 	"crypto/tls"
-	"go-micro.dev/v4/api/server/cors"
 	"net/http"
 
+	"go-micro.dev/v4/api/server/cors"
+	"go-micro.dev/v4/logger"
+
 	"go-micro.dev/v4/api/resolver"
 	"go-micro.dev/v4/api/server/acme"
 )
@@ -21,10 +23,23 @@ type Options struct {
 	TLSConfig    *tls.Config
 	Resolver     resolver.Resolver
 	Wrappers     []Wrapper
+	Logger       logger.Logger
 }
 
 type Wrapper func(h http.Handler) http.Handler
 
+func NewOptions(opts ...Option) Options {
+	options := Options{
+		Logger: logger.DefaultLogger,
+	}
+
+	for _, o := range opts {
+		o(&options)
+	}
+
+	return options
+}
+
 func WrapHandler(w Wrapper) Option {
 	return func(o *Options) {
 		o.Wrappers = append(o.Wrappers, w)
@@ -78,3 +93,10 @@ func Resolver(r resolver.Resolver) Option {
 		o.Resolver = r
 	}
 }
+
+// Logger sets the underline logging framework
+func Logger(l logger.Logger) Option {
+	return func(o *Options) {
+		o.Logger = l
+	}
+}

auth/options.go

@@ -3,13 +3,19 @@ package auth
 import (
 	"context"
 	"time"
+
+	"go-micro.dev/v4/logger"
 )
 
 func NewOptions(opts ...Option) Options {
-	var options Options
+	options := Options{
+		Logger: logger.DefaultLogger,
+	}
+
 	for _, o := range opts {
 		o(&options)
 	}
+
 	return options
 }
 
@@ -28,6 +34,8 @@ type Options struct {
 	PrivateKey string
 	// Addrs sets the addresses of auth
 	Addrs []string
+	// Logger is the underline logger
+	Logger logger.Logger
 }
 
 type Option func(o *Options)
@@ -60,6 +68,13 @@ func PrivateKey(key string) Option {
 	}
 }
 
+// WithLogger sets the underline logger
+func WithLogger(l logger.Logger) Option {
+	return func(o *Options) {
+		o.Logger = l
+	}
+}
+
 // Credentials sets the auth credentials
 func Credentials(id, secret string) Option {
 	return func(o *Options) {

broker/http.go

@@ -3,7 +3,6 @@ package broker
 
 import (
 	"bytes"
-	"context"
 	"crypto/tls"
 	"errors"
 	"fmt"
@@ -17,6 +16,8 @@ import (
 	"time"
 
 	"github.com/google/uuid"
+	"golang.org/x/net/http2"
+
 	"go-micro.dev/v4/codec/json"
 	merr "go-micro.dev/v4/errors"
 	"go-micro.dev/v4/registry"
@@ -24,7 +25,6 @@ import (
 	maddr "go-micro.dev/v4/util/addr"
 	mnet "go-micro.dev/v4/util/net"
 	mls "go-micro.dev/v4/util/tls"
-	"golang.org/x/net/http2"
 )
 
 // HTTP Broker is a point to point async broker
@@ -107,11 +107,10 @@ func newTransport(config *tls.Config) *http.Transport {
 }
 
 func newHttpBroker(opts ...Option) Broker {
-	options := Options{
+	options := *NewOptions(opts...)
-		Codec:    json.Marshaler{},
+
-		Context:  context.TODO(),
+	options.Registry = registry.DefaultRegistry
-		Registry: registry.DefaultRegistry,
+	options.Codec = json.Marshaler{}
-	}
 
 	for _, o := range opts {
 		o(&options)

broker/memory.go

@@ -2,20 +2,20 @@
 package broker
 
 import (
-	"context"
 	"errors"
 	"math/rand"
 	"sync"
 	"time"
 
 	"github.com/google/uuid"
-	"go-micro.dev/v4/logger"
+
+	log "go-micro.dev/v4/logger"
 	maddr "go-micro.dev/v4/util/addr"
 	mnet "go-micro.dev/v4/util/net"
 )
 
 type memoryBroker struct {
-	opts Options
+	opts *Options
 
 	addr string
 	sync.RWMutex
@@ -24,7 +24,7 @@ type memoryBroker struct {
 }
 
 type memoryEvent struct {
-	opts    Options
+	opts    *Options
 	topic   string
 	err     error
 	message interface{}
@@ -39,7 +39,7 @@ type memorySubscriber struct {
 }
 
 func (m *memoryBroker) Options() Options {
-	return m.opts
+	return *m.opts
 }
 
 func (m *memoryBroker) Address() string {
@@ -84,7 +84,7 @@ func (m *memoryBroker) Disconnect() error {
 
 func (m *memoryBroker) Init(opts ...Option) error {
 	for _, o := range opts {
-		o(&m.opts)
+		o(m.opts)
 	}
 	return nil
 }
@@ -190,9 +190,7 @@ func (m *memoryEvent) Message() *Message {
 	case []byte:
 		msg := &Message{}
 		if err := m.opts.Codec.Unmarshal(v, msg); err != nil {
-			if logger.V(logger.ErrorLevel, logger.DefaultLogger) {
+			m.opts.Logger.Logf(log.ErrorLevel, "[memory]: failed to unmarshal: %v\n", err)
-				logger.Errorf("[memory]: failed to unmarshal: %v\n", err)
-			}
 			return nil
 		}
 		return msg
@@ -223,14 +221,9 @@ func (m *memorySubscriber) Unsubscribe() error {
 }
 
 func NewMemoryBroker(opts ...Option) Broker {
-	options := Options{
+	options := NewOptions(opts...)
-		Context: context.Background(),
-	}
 
 	rand.Seed(time.Now().UnixNano())
-	for _, o := range opts {
-		o(&options)
-	}
 
 	return &memoryBroker{
 		opts:        options,

broker/options.go

@@ -5,6 +5,7 @@ import (
 	"crypto/tls"
 
 	"go-micro.dev/v4/codec"
+	"go-micro.dev/v4/logger"
 	"go-micro.dev/v4/registry"
 )
 
@@ -13,6 +14,9 @@ type Options struct {
 	Secure bool
 	Codec  codec.Marshaler
 
+	// Logger is the underlying logger
+	Logger logger.Logger
+
 	// Handler executed when error happens in broker mesage
 	// processing
 	ErrorHandler Handler
@@ -58,6 +62,19 @@ func PublishContext(ctx context.Context) PublishOption {
 
 type SubscribeOption func(*SubscribeOptions)
 
+func NewOptions(opts ...Option) *Options {
+	options := Options{
+		Context: context.Background(),
+		Logger:  logger.DefaultLogger,
+	}
+
+	for _, o := range opts {
+		o(&options)
+	}
+
+	return &options
+}
+
 func NewSubscribeOptions(opts ...SubscribeOption) SubscribeOptions {
 	opt := SubscribeOptions{
 		AutoAck: true,
@@ -128,6 +145,13 @@ func TLSConfig(t *tls.Config) Option {
 	}
 }
 
+// Logger sets the underline logger
+func Logger(l logger.Logger) Option {
+	return func(o *Options) {
+		o.Logger = l
+	}
+}
+
 // SubscribeContext set context
 func SubscribeContext(ctx context.Context) SubscribeOption {
 	return func(o *SubscribeOptions) {

cache/cache.go

@@ -22,7 +22,6 @@ var (
 )
 
 // Cache is the interface that wraps the cache.
-//
 type Cache interface {
 	// Get gets a cached value by key.
 	Get(ctx context.Context, key string) (interface{}, time.Time, error)

cache/options.go

@@ -3,6 +3,8 @@ package cache
 import (
 	"context"
 	"time"
+
+	"go-micro.dev/v4/logger"
 )
 
 // Options represents the options for the cache.
@@ -13,6 +15,8 @@ type Options struct {
 	Address string
 	// Context should contain all implementation specific options, using context.WithValue.
 	Context context.Context
+	// Logger is the be used logger
+	Logger logger.Logger
 }
 
 // Option manipulates the Options passed.
@@ -46,11 +50,19 @@ func WithContext(c context.Context) Option {
 	}
 }
 
+// WithLogger sets underline logger
+func WithLogger(l logger.Logger) Option {
+	return func(o *Options) {
+		o.Logger = l
+	}
+}
+
 // NewOptions returns a new options struct.
 func NewOptions(opts ...Option) Options {
 	options := Options{
 		Expiration: DefaultExpiration,
 		Items:      make(map[string]Item),
+		Logger:     logger.DefaultLogger,
 	}
 
 	for _, o := range opts {

client/options.go

@@ -6,6 +6,7 @@ import (
 
 	"go-micro.dev/v4/broker"
 	"go-micro.dev/v4/codec"
+	"go-micro.dev/v4/logger"
 	"go-micro.dev/v4/registry"
 	"go-micro.dev/v4/selector"
 	"go-micro.dev/v4/transport"
@@ -38,6 +39,9 @@ type Options struct {
 	// Default Call Options
 	CallOptions CallOptions
 
+	// Logger is the underline logger
+	Logger logger.Logger
+
 	// Other options for implementations of the interface
 	// can be stored in a context
 	Context context.Context
@@ -113,6 +117,7 @@ func NewOptions(options ...Option) Options {
 		Selector:  selector.DefaultSelector,
 		Registry:  registry.DefaultRegistry,
 		Transport: transport.DefaultTransport,
+		Logger:    logger.DefaultLogger,
 	}
 
 	for _, o := range options {
@@ -364,3 +369,10 @@ func WithRouter(r Router) Option {
 		o.Router = r
 	}
 }
+
+// WithLogger sets the underline logger
+func WithLogger(l logger.Logger) Option {
+	return func(o *Options) {
+		o.Logger = l
+	}
+}

config/source/cli/cli.go

@@ -89,6 +89,7 @@ func (c *cliSource) String() string {
 // command line flags have already been parsed.
 //
 // Example:
+//
 //	cli.StringFlag{Name: "db-host"},
 //
 //

config/source/env/env.go

@@ -117,6 +117,7 @@ func (e *env) String() string {
 // Underscores are delimiters for nesting, and all keys are lowercased.
 //
 // Example:
+//
 //	"DATABASE_SERVER_HOST=localhost" will convert to
 //
 //	{

config/source/flag/flag.go

@@ -89,6 +89,7 @@ func (fs *flagsrc) String() string {
 // Hyphens are delimiters for nesting, and all keys are lowercased.
 //
 // Example:
+//
 //	dbhost := flag.String("database-host", "localhost", "the db host name")
 //
 //	{

events/memory.go

@@ -8,18 +8,17 @@ import (
 
 	"github.com/google/uuid"
 	"github.com/pkg/errors"
-	"go-micro.dev/v4/logger"
+
+	log "go-micro.dev/v4/logger"
 	"go-micro.dev/v4/store"
 )
 
 // NewStream returns an initialized memory stream
 func NewStream(opts ...Option) (Stream, error) {
 	// parse the options
-	var options Options
+	options := NewOptions(opts...)
-	for _, o := range opts {
+
-		o(&options)
+	return &mem{store: store.NewMemoryStore(), options: options}, nil
-	}
-	return &mem{store: store.NewMemoryStore()}, nil
 }
 
 type subscriber struct {
@@ -35,6 +34,7 @@ type subscriber struct {
 }
 
 type mem struct {
+	options *Options
 	store   store.Store
 
 	subs []*subscriber
@@ -147,10 +147,8 @@ func (m *mem) Consume(topic string, opts ...ConsumeOption) (<-chan Event, error)
 func (m *mem) lookupPreviousEvents(sub *subscriber, startTime time.Time) {
 	// lookup all events which match the topic (a blank topic will return all results)
 	recs, err := m.store.Read(sub.Topic+"/", store.ReadPrefix())
-	if err != nil && logger.V(logger.ErrorLevel, logger.DefaultLogger) {
+	if err != nil {
-		logger.Errorf("Error looking up previous events: %v", err)
+		m.options.Logger.Logf(log.ErrorLevel, "Error looking up previous events: %v", err)
-		return
-	} else if err != nil {
 		return
 	}
 
@@ -172,7 +170,7 @@ func (m *mem) handleEvent(ev *Event) {
 	m.RLock()
 	subs := m.subs
 	m.RUnlock()
-
+	logger := m.options.Logger
 	// filteredSubs is a KV map of the queue name and subscribers. This is used to prevent a message
 	// being sent to two subscribers with the same queue.
 	filteredSubs := map[string]*subscriber{}
@@ -186,16 +184,19 @@ func (m *mem) handleEvent(ev *Event) {
 
 	// send the message to each channel async (since one channel might be blocked)
 	for _, sub := range filteredSubs {
-		sendEvent(ev, sub)
+		go func(s *subscriber) {
+			if err := sendEvent(ev, s); err != nil {
+				logger.Log(log.ErrorLevel, err)
+			}
+		}(sub)
 	}
 }
 
-func sendEvent(ev *Event, sub *subscriber) {
+func sendEvent(ev *Event, s *subscriber) error {
-	go func(s *subscriber) {
 	evCopy := *ev
 	if s.autoAck {
 		s.Channel <- evCopy
-			return
+		return nil
 	}
 	evCopy.SetAckFunc(ackFunc(s, evCopy))
 	evCopy.SetNackFunc(nackFunc(s, evCopy))
@@ -212,20 +213,17 @@ func sendEvent(ev *Event, sub *subscriber) {
 		}
 
 		if s.retryLimit > -1 && count > s.retryLimit {
-				if logger.V(logger.ErrorLevel, logger.DefaultLogger) {
-					logger.Errorf("Message retry limit reached, discarding: %v %d %d", evCopy.ID, count, s.retryLimit)
-				}
 			s.Lock()
 			delete(s.retryMap, evCopy.ID)
 			s.Unlock()
-				return
+			return fmt.Errorf("Message retry limit reached, discarding: %v %d %d", evCopy.ID, count, s.retryLimit)
 		}
 		s.Channel <- evCopy
 		s.Lock()
 		s.retryMap[evCopy.ID] = count + 1
 		s.Unlock()
 	}
-	}(sub)
+	return nil
 }
 
 func ackFunc(s *subscriber, evCopy Event) func() error {

events/options.go

@@ -1,18 +1,44 @@
 package events
 
-import "time"
+import (
+	"time"
 
-type Options struct{}
+	"go-micro.dev/v4/logger"
+)
+
+type Options struct {
+	Logger logger.Logger
+}
 
 type Option func(o *Options)
 
+func NewOptions(opts ...Option) *Options {
+	options := Options{
+		Logger: logger.DefaultLogger,
+	}
+
+	for _, o := range opts {
+		o(&options)
+	}
+
+	return &options
+}
+
 type StoreOptions struct {
 	TTL    time.Duration
 	Backup Backup
+	Logger logger.Logger
 }
 
 type StoreOption func(o *StoreOptions)
 
+// WithLogger sets the underline logger
+func WithLogger(l logger.Logger) StoreOption {
+	return func(o *StoreOptions) {
+		o.Logger = l
+	}
+}
+
 // PublishOptions contains all the options which can be provided when publishing an event
 type PublishOptions struct {
 	// Metadata contains any keys which can be used to query the data, for example a customer id

events/store.go

@@ -5,7 +5,8 @@ import (
 	"time"
 
 	"github.com/pkg/errors"
-	"go-micro.dev/v4/logger"
+
+	log "go-micro.dev/v4/logger"
 	"go-micro.dev/v4/store"
 )
 
@@ -22,6 +23,8 @@ func NewStore(opts ...StoreOption) Store {
 		options.TTL = time.Hour * 24
 	}
 
+	options.Logger = log.LoggerOrDefault(options.Logger)
+
 	// return the store
 	evs := &evStore{
 		opts:  options,
@@ -114,7 +117,7 @@ func (s *evStore) backupLoop() {
 	for {
 		err := s.opts.Backup.Snapshot(s.store)
 		if err != nil {
-			logger.Errorf("Error running backup %s", err)
+			s.opts.Logger.Logf(log.ErrorLevel, "Error running backup %s", err)
 		}
 
 		time.Sleep(1 * time.Hour)

logger/default.go

@@ -135,7 +135,7 @@ func (l *defaultLogger) Log(level Level, v ...interface{}) {
 
 func (l *defaultLogger) Logf(level Level, format string, v ...interface{}) {
 	//	 TODO decide does we need to write message if log level not used?
-	if level < l.opts.Level {
+	if !l.opts.Level.Enabled(level) {
 		return
 	}
 

logger/helper.go

@@ -129,3 +129,10 @@ func (h *Helper) WithError(err error) *Helper {
 func (h *Helper) WithFields(fields map[string]interface{}) *Helper {
 	return &Helper{logger: h.logger.Fields(fields)}
 }
+
+func HelperOrDefault(h *Helper) *Helper {
+	if h == nil {
+		return DefaultHelper
+	}
+	return h
+}

logger/logger.go

@@ -4,6 +4,9 @@ package logger
 var (
 	// Default logger
 	DefaultLogger Logger = NewLogger()
+
+	// Default logger helper
+	DefaultHelper *Helper = NewHelper(DefaultLogger)
 )
 
 // Logger is a generic logging interface
@@ -41,3 +44,10 @@ func Logf(level Level, format string, v ...interface{}) {
 func String() string {
 	return DefaultLogger.String()
 }
+
+func LoggerOrDefault(l Logger) Logger {
+	if l == nil {
+		return DefaultLogger
+	}
+	return l
+}

options.go

@@ -12,6 +12,7 @@ import (
 	"go-micro.dev/v4/config"
 	"go-micro.dev/v4/debug/profile"
 	"go-micro.dev/v4/debug/trace"
+	"go-micro.dev/v4/logger"
 	"go-micro.dev/v4/registry"
 	"go-micro.dev/v4/runtime"
 	"go-micro.dev/v4/selector"
@@ -35,7 +36,7 @@ type Options struct {
 	Runtime   runtime.Runtime
 	Transport transport.Transport
 	Profile   profile.Profile
-
+	Logger    logger.Logger
 	// Before and After funcs
 	BeforeStart []func() error
 	BeforeStop  []func() error
@@ -64,6 +65,7 @@ func newOptions(opts ...Option) Options {
 		Transport: transport.DefaultTransport,
 		Context:   context.Background(),
 		Signal:    true,
+		Logger:    logger.DefaultLogger,
 	}
 
 	for _, o := range opts {
@@ -340,3 +342,10 @@ func AfterStop(fn func() error) Option {
 		o.AfterStop = append(o.AfterStop, fn)
 	}
 }
+
+// Logger sets the logger for the service
+func Logger(l logger.Logger) Option {
+	return func(o *Options) {
+		o.Logger = l
+	}
+}

registry/cache/cache.go

@@ -7,10 +7,11 @@ import (
 	"sync"
 	"time"
 
-	"go-micro.dev/v4/logger"
+	"golang.org/x/sync/singleflight"
+
+	log "go-micro.dev/v4/logger"
 	"go-micro.dev/v4/registry"
 	util "go-micro.dev/v4/util/registry"
-	"golang.org/x/sync/singleflight"
 )
 
 // Cache is the registry cache interface
@@ -24,6 +25,8 @@ type Cache interface {
 type Options struct {
 	// TTL is the cache TTL
 	TTL time.Duration
+
+	Logger log.Logger
 }
 
 type Option func(o *Options)
@@ -320,7 +323,7 @@ func (c *cache) run(service string) {
 	c.Lock()
 	c.watchedRunning[service] = true
 	c.Unlock()
-
+	logger := c.opts.Logger
 	// reset watcher on exit
 	defer func() {
 		c.Lock()
@@ -352,9 +355,7 @@ func (c *cache) run(service string) {
 			c.setStatus(err)
 
 			if a > 3 {
-				if logger.V(logger.DebugLevel, logger.DefaultLogger) {
+				logger.Logf(log.DebugLevel, "rcache: ", err, " backing off ", d)
-					logger.Debug("rcache: ", err, " backing off ", d)
-				}
 				a = 0
 			}
 
@@ -377,9 +378,7 @@ func (c *cache) run(service string) {
 			c.setStatus(err)
 
 			if b > 3 {
-				if logger.V(logger.DebugLevel, logger.DefaultLogger) {
+				logger.Logf(log.DebugLevel, "rcache: ", err, " backing off ", d)
-					logger.Debug("rcache: ", err, " backing off ", d)
-				}
 				b = 0
 			}
 
@@ -468,6 +467,7 @@ func New(r registry.Registry, opts ...Option) Cache {
 	rand.Seed(time.Now().UnixNano())
 	options := Options{
 		TTL:    DefaultTTL,
+		Logger: log.DefaultLogger,
 	}
 
 	for _, o := range opts {

registry/cache/options.go

@@ -2,6 +2,8 @@ package cache
 
 import (
 	"time"
+
+	"go-micro.dev/v4/logger"
 )
 
 // WithTTL sets the cache TTL
@@ -10,3 +12,10 @@ func WithTTL(t time.Duration) Option {
 		o.TTL = t
 	}
 }
+
+// WithLogger sets the underline logger
+func WithLogger(l logger.Logger) Option {
+	return func(o *Options) {
+		o.Logger = l
+	}
+}

registry/mdns_registry.go

@@ -16,7 +16,8 @@ import (
 	"time"
 
 	"github.com/google/uuid"
-	"go-micro.dev/v4/logger"
+
+	log "go-micro.dev/v4/logger"
 	"go-micro.dev/v4/util/mdns"
 )
 
@@ -38,7 +39,7 @@ type mdnsEntry struct {
 }
 
 type mdnsRegistry struct {
-	opts Options
+	opts *Options
 	// the mdns domain
 	domain string
 
@@ -128,14 +129,8 @@ func decode(record []string) (*mdnsTxt, error) {
 	return txt, nil
 }
 func newRegistry(opts ...Option) Registry {
-	options := Options{
+	mergedOpts := append([]Option{Timeout(time.Millisecond * 100)}, opts...)
-		Context: context.Background(),
+	options := NewOptions(mergedOpts...)
-		Timeout: time.Millisecond * 100,
-	}
-
-	for _, o := range opts {
-		o(&options)
-	}
 
 	// set the domain
 	domain := mdnsDomain
@@ -155,19 +150,20 @@ func newRegistry(opts ...Option) Registry {
 
 func (m *mdnsRegistry) Init(opts ...Option) error {
 	for _, o := range opts {
-		o(&m.opts)
+		o(m.opts)
 	}
 	return nil
 }
 
 func (m *mdnsRegistry) Options() Options {
-	return m.opts
+	return *m.opts
 }
 
 func (m *mdnsRegistry) Register(service *Service, opts ...RegisterOption) error {
 	m.Lock()
 	defer m.Unlock()
 
+	logger := m.opts.Logger
 	entries, ok := m.services[service.Name]
 	// first entry, create wildcard used for list queries
 	if !ok {
@@ -234,9 +230,8 @@ func (m *mdnsRegistry) Register(service *Service, opts ...RegisterOption) error
 		}
 		port, _ := strconv.Atoi(pt)
 
-		if logger.V(logger.DebugLevel, logger.DefaultLogger) {
+		logger.Logf(log.DebugLevel, "[mdns] registry create new service with ip: %s for: %s", net.ParseIP(host).String(), host)
-			logger.Debugf("[mdns] registry create new service with ip: %s for: %s", net.ParseIP(host).String(), host)
+
-		}
 		// we got here, new node
 		s, err := mdns.NewMDNSService(
 			node.Id,
@@ -305,6 +300,7 @@ func (m *mdnsRegistry) Deregister(service *Service, opts ...DeregisterOption) er
 }
 
 func (m *mdnsRegistry) GetService(service string, opts ...GetOption) ([]*Service, error) {
+	logger := m.opts.Logger
 	serviceMap := make(map[string]*Service)
 	entries := make(chan *mdns.ServiceEntry, 10)
 	done := make(chan bool)
@@ -359,9 +355,7 @@ func (m *mdnsRegistry) GetService(service string, opts ...GetOption) ([]*Service
 				} else if len(e.AddrV6) > 0 {
 					addr = net.JoinHostPort(e.AddrV6.String(), fmt.Sprint(e.Port))
 				} else {
-					if logger.V(logger.InfoLevel, logger.DefaultLogger) {
+					logger.Logf(log.InfoLevel, "[mdns]: invalid endpoint received: %v", e)
-						logger.Infof("[mdns]: invalid endpoint received: %v", e)
-					}
 					continue
 				}
 				s.Nodes = append(s.Nodes, &Node{

registry/memory.go

@@ -1,12 +1,12 @@
 package registry
 
 import (
-	"context"
 	"sync"
 	"time"
 
 	"github.com/google/uuid"
-	"go-micro.dev/v4/logger"
+
+	log "go-micro.dev/v4/logger"
 )
 
 var (
@@ -29,7 +29,7 @@ type record struct {
 }
 
 type memRegistry struct {
-	options Options
+	options *Options
 
 	sync.RWMutex
 	records  map[string]map[string]*record
@@ -37,13 +37,7 @@ type memRegistry struct {
 }
 
 func NewMemoryRegistry(opts ...Option) Registry {
-	options := Options{
+	options := NewOptions(opts...)
-		Context: context.Background(),
-	}
-
-	for _, o := range opts {
-		o(&options)
-	}
 
 	records := getServiceRecords(options.Context)
 	if records == nil {
@@ -62,6 +56,7 @@ func NewMemoryRegistry(opts ...Option) Registry {
 }
 
 func (m *memRegistry) ttlPrune() {
+	logger := m.options.Logger
 	prune := time.NewTicker(ttlPruneTime)
 	defer prune.Stop()
 
@@ -73,9 +68,7 @@ func (m *memRegistry) ttlPrune() {
 				for version, record := range records {
 					for id, n := range record.Nodes {
 						if n.TTL != 0 && time.Since(n.LastSeen) > n.TTL {
-							if logger.V(logger.DebugLevel, logger.DefaultLogger) {
+							logger.Logf(log.DebugLevel, "Registry TTL expired for node %s of service %s", n.Id, name)
-								logger.Debugf("Registry TTL expired for node %s of service %s", n.Id, name)
-							}
 							delete(m.records[name][version].Nodes, id)
 						}
 					}
@@ -111,7 +104,7 @@ func (m *memRegistry) sendEvent(r *Result) {
 
 func (m *memRegistry) Init(opts ...Option) error {
 	for _, o := range opts {
-		o(&m.options)
+		o(m.options)
 	}
 
 	// add services
@@ -138,13 +131,13 @@ func (m *memRegistry) Init(opts ...Option) error {
 }
 
 func (m *memRegistry) Options() Options {
-	return m.options
+	return *m.options
 }
 
 func (m *memRegistry) Register(s *Service, opts ...RegisterOption) error {
 	m.Lock()
 	defer m.Unlock()
-
+	logger := m.options.Logger
 	var options RegisterOptions
 	for _, o := range opts {
 		o(&options)
@@ -158,9 +151,7 @@ func (m *memRegistry) Register(s *Service, opts ...RegisterOption) error {
 
 	if _, ok := m.records[s.Name][s.Version]; !ok {
 		m.records[s.Name][s.Version] = r
-		if logger.V(logger.DebugLevel, logger.DefaultLogger) {
+		logger.Logf(log.DebugLevel, "Registry added new service: %s, version: %s", s.Name, s.Version)
-			logger.Debugf("Registry added new service: %s, version: %s", s.Name, s.Version)
-		}
 		go m.sendEvent(&Result{Action: "update", Service: s})
 		return nil
 	}
@@ -186,18 +177,14 @@ func (m *memRegistry) Register(s *Service, opts ...RegisterOption) error {
 	}
 
 	if addedNodes {
-		if logger.V(logger.DebugLevel, logger.DefaultLogger) {
+		logger.Logf(log.DebugLevel, "Registry added new node to service: %s, version: %s", s.Name, s.Version)
-			logger.Debugf("Registry added new node to service: %s, version: %s", s.Name, s.Version)
-		}
 		go m.sendEvent(&Result{Action: "update", Service: s})
 		return nil
 	}
 
 	// refresh TTL and timestamp
 	for _, n := range s.Nodes {
-		if logger.V(logger.DebugLevel, logger.DefaultLogger) {
+		logger.Logf(log.DebugLevel, "Updated registration for service: %s, version: %s", s.Name, s.Version)
-			logger.Debugf("Updated registration for service: %s, version: %s", s.Name, s.Version)
-		}
 		m.records[s.Name][s.Version].Nodes[n.Id].TTL = options.TTL
 		m.records[s.Name][s.Version].Nodes[n.Id].LastSeen = time.Now()
 	}
@@ -208,29 +195,23 @@ func (m *memRegistry) Register(s *Service, opts ...RegisterOption) error {
 func (m *memRegistry) Deregister(s *Service, opts ...DeregisterOption) error {
 	m.Lock()
 	defer m.Unlock()
-
+	logger := m.options.Logger
 	if _, ok := m.records[s.Name]; ok {
 		if _, ok := m.records[s.Name][s.Version]; ok {
 			for _, n := range s.Nodes {
 				if _, ok := m.records[s.Name][s.Version].Nodes[n.Id]; ok {
-					if logger.V(logger.DebugLevel, logger.DefaultLogger) {
+					logger.Logf(log.DebugLevel, "Registry removed node from service: %s, version: %s", s.Name, s.Version)
-						logger.Debugf("Registry removed node from service: %s, version: %s", s.Name, s.Version)
-					}
 					delete(m.records[s.Name][s.Version].Nodes, n.Id)
 				}
 			}
 			if len(m.records[s.Name][s.Version].Nodes) == 0 {
 				delete(m.records[s.Name], s.Version)
-				if logger.V(logger.DebugLevel, logger.DefaultLogger) {
+				logger.Logf(log.DebugLevel, "Registry removed service: %s, version: %s", s.Name, s.Version)
-					logger.Debugf("Registry removed service: %s, version: %s", s.Name, s.Version)
-				}
 			}
 		}
 		if len(m.records[s.Name]) == 0 {
 			delete(m.records, s.Name)
-			if logger.V(logger.DebugLevel, logger.DefaultLogger) {
+			logger.Logf(log.DebugLevel, "Registry removed service: %s", s.Name)
-				logger.Debugf("Registry removed service: %s", s.Name)
-			}
 		}
 		go m.sendEvent(&Result{Action: "delete", Service: s})
 	}

registry/options.go

@@ -4,6 +4,8 @@ import (
 	"context"
 	"crypto/tls"
 	"time"
+
+	"go-micro.dev/v4/logger"
 )
 
 type Options struct {
@@ -11,6 +13,7 @@ type Options struct {
 	Timeout   time.Duration
 	Secure    bool
 	TLSConfig *tls.Config
+	Logger    logger.Logger
 	// Other options for implementations of the interface
 	// can be stored in a context
 	Context context.Context
@@ -44,6 +47,19 @@ type ListOptions struct {
 	Context context.Context
 }
 
+func NewOptions(opts ...Option) *Options {
+	options := Options{
+		Context: context.Background(),
+		Logger:  logger.DefaultLogger,
+	}
+
+	for _, o := range opts {
+		o(&options)
+	}
+
+	return &options
+}
+
 // Addrs is the registry addresses to use
 func Addrs(addrs ...string) Option {
 	return func(o *Options) {
@@ -146,3 +162,10 @@ func Services(s map[string][]*Service) Option {
 		o.Context = context.WithValue(o.Context, servicesKey{}, s)
 	}
 }
+
+// Logger sets the underline logger
+func Logger(l logger.Logger) Option {
+	return func(o *Options) {
+		o.Logger = l
+	}
+}

runtime/default.go

@@ -6,7 +6,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"log"
 	"os"
 	"path/filepath"
 	"strings"
@@ -14,7 +13,8 @@ import (
 	"time"
 
 	"github.com/nxadm/tail"
-	"go-micro.dev/v4/logger"
+
+	log "go-micro.dev/v4/logger"
 	"go-micro.dev/v4/runtime/local/git"
 )
 
@@ -24,7 +24,7 @@ const defaultNamespace = "default"
 type runtime struct {
 	sync.RWMutex
 	// options configure runtime
-	options Options
+	options *Options
 	// used to stop the runtime
 	closed chan bool
 	// used to start new services
@@ -39,12 +39,7 @@ type runtime struct {
 // NewRuntime creates new local runtime and returns it
 func NewRuntime(opts ...Option) Runtime {
 	// get default options
-	options := Options{}
+	options := NewOptions(opts...)
-
-	// apply requested options
-	for _, o := range opts {
-		o(&options)
-	}
 
 	// make the logs directory
 	path := filepath.Join(os.TempDir(), "micro", "logs")
@@ -181,7 +176,7 @@ func (r *runtime) Init(opts ...Option) error {
 	defer r.Unlock()
 
 	for _, o := range opts {
-		o(&r.options)
+		o(r.options)
 	}
 
 	return nil
@@ -192,6 +187,7 @@ func (r *runtime) run(events <-chan Event) {
 	t := time.NewTicker(time.Second * 5)
 	defer t.Stop()
 
+	logger := r.options.Logger
 	// process event processes an incoming event
 	processEvent := func(event Event, service *service, ns string) error {
 		// get current vals
@@ -205,9 +201,7 @@ func (r *runtime) run(events <-chan Event) {
 			return nil
 		}
 
-		if logger.V(logger.DebugLevel, logger.DefaultLogger) {
+		logger.Logf(log.DebugLevel, "Runtime updating service %s in %v namespace", name, ns)
-			logger.Debugf("Runtime updating service %s in %v namespace", name, ns)
-		}
 
 		// this will cause a delete followed by created
 		if err := r.Update(service.Service, UpdateNamespace(ns)); err != nil {
@@ -234,13 +228,10 @@ func (r *runtime) run(events <-chan Event) {
 					}
 
 					// TODO: check service error
-					if logger.V(logger.DebugLevel, logger.DefaultLogger) {
+					logger.Logf(log.DebugLevel, "Runtime starting %s", service.Name)
-						logger.Debugf("Runtime starting %s", service.Name)
+
-					}
 					if err := service.Start(); err != nil {
-						if logger.V(logger.DebugLevel, logger.DefaultLogger) {
+						logger.Logf(log.DebugLevel, "Runtime error starting %s: %v", service.Name, err)
-							logger.Debugf("Runtime error starting %s: %v", service.Name, err)
-						}
 					}
 				}
 			}
@@ -250,18 +241,13 @@ func (r *runtime) run(events <-chan Event) {
 				continue
 			}
 			// TODO: check service error
-			if logger.V(logger.DebugLevel, logger.DefaultLogger) {
+			logger.Logf(log.DebugLevel, "Runtime starting service %s", service.Name)
-				logger.Debugf("Runtime starting service %s", service.Name)
+
-			}
 			if err := service.Start(); err != nil {
-				if logger.V(logger.DebugLevel, logger.DefaultLogger) {
+				logger.Logf(log.DebugLevel, "Runtime error starting service %s: %v", service.Name, err)
-					logger.Debugf("Runtime error starting service %s: %v", service.Name, err)
-				}
 			}
 		case event := <-events:
-			if logger.V(logger.DebugLevel, logger.DefaultLogger) {
+			logger.Logf(log.DebugLevel, "Runtime received notification event: %v", event)
-				logger.Debugf("Runtime received notification event: %v", event)
-			}
 			// NOTE: we only handle Update events for now
 			switch event.Type {
 			case Update:
@@ -273,22 +259,18 @@ func (r *runtime) run(events <-chan Event) {
 
 					r.RLock()
 					if _, ok := r.namespaces[ns]; !ok {
-						if logger.V(logger.DebugLevel, logger.DefaultLogger) {
+						logger.Logf(log.DebugLevel, "Runtime unknown namespace: %s", ns)
-							logger.Debugf("Runtime unknown namespace: %s", ns)
-						}
 						r.RUnlock()
 						continue
 					}
 					service, ok := r.namespaces[ns][fmt.Sprintf("%v:%v", event.Service.Name, event.Service.Version)]
 					r.RUnlock()
 					if !ok {
-						logger.Debugf("Runtime unknown service: %s", event.Service)
+						logger.Logf(log.DebugLevel, "Runtime unknown service: %s", event.Service)
 					}
 
 					if err := processEvent(event, service, ns); err != nil {
-						if logger.V(logger.DebugLevel, logger.DefaultLogger) {
+						logger.Logf(log.DebugLevel, "Runtime error updating service %s: %v", event.Service, err)
-							logger.Debugf("Runtime error updating service %s: %v", event.Service, err)
-						}
 					}
 					continue
 				}
@@ -301,17 +283,13 @@ func (r *runtime) run(events <-chan Event) {
 				for ns, services := range namespaces {
 					for _, service := range services {
 						if err := processEvent(event, service, ns); err != nil {
-							if logger.V(logger.DebugLevel, logger.DefaultLogger) {
+							logger.Logf(log.DebugLevel, "Runtime error updating service %s: %v", service.Name, err)
-								logger.Debugf("Runtime error updating service %s: %v", service.Name, err)
-							}
 						}
 					}
 				}
 			}
 		case <-r.closed:
-			if logger.V(logger.DebugLevel, logger.DefaultLogger) {
+			logger.Logf(log.DebugLevel, "Runtime stopped")
-				logger.Debugf("Runtime stopped")
-			}
 			return
 		}
 	}
@@ -357,11 +335,11 @@ func (r *runtime) Create(s *Service, opts ...CreateOption) error {
 	}
 
 	// create new service
-	service := newService(s, options)
+	service := newService(s, options, r.options.Logger)
 
 	f, err := os.OpenFile(logFile(service.Name), os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
 	if err != nil {
-		log.Fatal(err)
+		r.options.Logger.Log(log.FatalLevel, err)
 	}
 
 	if service.output != nil {
@@ -400,10 +378,12 @@ func (r *runtime) Logs(s *Service, options ...LogsOption) (LogStream, error) {
 	for _, o := range options {
 		o(&lopts)
 	}
+
 	ret := &logStream{
 		service: s.Name,
 		stream:  make(chan LogRecord),
 		stop:    make(chan bool),
+		logger:  r.options.Logger,
 	}
 
 	fpath := logFile(s.Name)
@@ -463,6 +443,7 @@ type logStream struct {
 	sync.Mutex
 	stop   chan bool
 	err    error
+	logger log.Logger
 }
 
 func (l *logStream) Chan() chan LogRecord {
@@ -485,7 +466,7 @@ func (l *logStream) Stop() error {
 		close(l.stream)
 		err := l.tail.Stop()
 		if err != nil {
-			logger.Errorf("Error stopping tail: %v", err)
+			l.logger.Logf(log.ErrorLevel, "Error stopping tail: %v", err)
 			return err
 		}
 	}
@@ -565,7 +546,7 @@ func (r *runtime) Update(s *Service, opts ...UpdateOption) error {
 	}
 
 	if err := service.Stop(); err != nil && err.Error() != "no such process" {
-		logger.Errorf("Error stopping service %s: %s", service.Name, err)
+		r.options.Logger.Logf(log.ErrorLevel, "Error stopping service %s: %s", service.Name, err)
 		return err
 	}
 
@@ -590,9 +571,7 @@ func (r *runtime) Delete(s *Service, opts ...DeleteOption) error {
 		return nil
 	}
 
-	if logger.V(logger.DebugLevel, logger.DefaultLogger) {
+	r.options.Logger.Logf(log.DebugLevel, "Runtime deleting service %s", s.Name)
-		logger.Debugf("Runtime deleting service %s", s.Name)
-	}
 
 	service, ok := srvs[serviceKey(s)]
 	if !ok {
@@ -635,9 +614,7 @@ func (r *runtime) Start() error {
 		events, err = r.options.Scheduler.Notify()
 		if err != nil {
 			// TODO: should we bail here?
-			if logger.V(logger.DebugLevel, logger.DefaultLogger) {
+			r.options.Logger.Logf(log.DebugLevel, "Runtime failed to start update notifier")
-				logger.Debugf("Runtime failed to start update notifier")
-			}
 		}
 	}
 
@@ -667,9 +644,7 @@ func (r *runtime) Stop() error {
 		// stop all the services
 		for _, services := range r.namespaces {
 			for _, service := range services {
-				if logger.V(logger.DebugLevel, logger.DefaultLogger) {
+				r.options.Logger.Logf(log.DebugLevel, "Runtime stopping %s", service.Name)
-					logger.Debugf("Runtime stopping %s", service.Name)
-				}
 				service.Stop()
 			}
 		}

runtime/kubernetes/kubernetes.go

@@ -17,7 +17,7 @@ type action int
 type kubernetes struct {
 	sync.RWMutex
 	// options configure runtime
-	options runtime.Options
+	options *runtime.Options
 	// indicates if we're running
 	running bool
 	// used to stop the runtime
@@ -235,7 +235,7 @@ func (k *kubernetes) getService(labels map[string]string, opts ...client.GetOpti
 func (k *kubernetes) run(events <-chan runtime.Event) {
 	t := time.NewTicker(time.Second * 10)
 	defer t.Stop()
-
+	logger := k.options.Logger
 	for {
 		select {
 		case <-t.C:
@@ -243,9 +243,7 @@ func (k *kubernetes) run(events <-chan runtime.Event) {
 			// - do we even need the ticker for k8s services?
 		case event := <-events:
 			// NOTE: we only handle Update events for now
-			if log.V(log.DebugLevel, log.DefaultLogger) {
+			logger.Logf(log.DebugLevel, "Runtime received notification event: %v", event)
-				log.Debugf("Runtime received notification event: %v", event)
-			}
 			switch event.Type {
 			case runtime.Update:
 				// only process if there's an actual service
@@ -277,9 +275,7 @@ func (k *kubernetes) run(events <-chan runtime.Event) {
 				}, client.GetLabels(labels))
 
 				if err != nil {
-					if log.V(log.DebugLevel, log.DefaultLogger) {
+					logger.Logf(log.DebugLevel, "Runtime update failed to get service %s: %v", event.Service, err)
-						log.Debugf("Runtime update failed to get service %s: %v", event.Service, err)
-					}
 					continue
 				}
 
@@ -298,21 +294,15 @@ func (k *kubernetes) run(events <-chan runtime.Event) {
 					// update the build time
 					service.Spec.Template.Metadata.Annotations["updated"] = fmt.Sprintf("%d", event.Timestamp.Unix())
 
-					if log.V(log.DebugLevel, log.DefaultLogger) {
+					logger.Logf(log.DebugLevel, "Runtime updating service: %s deployment: %s", event.Service, service.Metadata.Name)
-						log.Debugf("Runtime updating service: %s deployment: %s", event.Service, service.Metadata.Name)
-					}
 					if err := k.client.Update(deploymentResource(&service)); err != nil {
-						if log.V(log.DebugLevel, log.DefaultLogger) {
+						logger.Logf(log.DebugLevel, "Runtime failed to update service %s: %v", event.Service, err)
-							log.Debugf("Runtime failed to update service %s: %v", event.Service, err)
-						}
 						continue
 					}
 				}
 			}
 		case <-k.closed:
-			if log.V(log.DebugLevel, log.DefaultLogger) {
+			logger.Logf(log.DebugLevel, "Runtime stopped")
-				log.Debugf("Runtime stopped")
-			}
 			return
 		}
 	}
@@ -324,7 +314,7 @@ func (k *kubernetes) Init(opts ...runtime.Option) error {
 	defer k.Unlock()
 
 	for _, o := range opts {
-		o(&k.options)
+		o(k.options)
 	}
 
 	return nil
@@ -341,7 +331,7 @@ func (k *kubernetes) Logs(s *runtime.Service, options ...runtime.LogsOption) (ru
 		go func() {
 			records, err := klo.Read()
 			if err != nil {
-				log.Errorf("Failed to get logs for service '%v' from k8s: %v", err)
+				k.options.Logger.Logf(log.ErrorLevel, "Failed to get logs for service '%v' from k8s: %v", err)
 				return
 			}
 			// @todo: this might actually not run before podLogStream starts
@@ -425,7 +415,7 @@ func (k *kubernetes) Create(s *runtime.Service, opts ...runtime.CreateOption) er
 	options.Image = k.getImage(s, options)
 
 	// create new service
-	service := newService(s, options)
+	service := newService(s, options, k.options.Logger)
 
 	// start the service
 	return service.Start(k.client, client.CreateNamespace(options.Namespace))
@@ -542,7 +532,7 @@ func (k *kubernetes) Delete(s *runtime.Service, opts ...runtime.DeleteOption) er
 	service := newService(s, runtime.CreateOptions{
 		Type:      k.options.Type,
 		Namespace: options.Namespace,
-	})
+	}, k.options.Logger)
 
 	return service.Stop(k.client, client.DeleteNamespace(options.Namespace))
 }
@@ -567,9 +557,7 @@ func (k *kubernetes) Start() error {
 		events, err = k.options.Scheduler.Notify()
 		if err != nil {
 			// TODO: should we bail here?
-			if log.V(log.DebugLevel, log.DefaultLogger) {
+			k.options.Logger.Logf(log.DebugLevel, "Runtime failed to start update notifier")
-				log.Debugf("Runtime failed to start update notifier")
-			}
 		}
 	}
 
@@ -611,15 +599,9 @@ func (k *kubernetes) String() string {
 // NewRuntime creates new kubernetes runtime
 func NewRuntime(opts ...runtime.Option) runtime.Runtime {
 	// get default options
-	options := runtime.Options{
 	// Create labels with type "micro": "service"
-		Type: "service",
+	mtops := append([]runtime.Option{runtime.WithType("service")}, opts...)
-	}
+	options := runtime.NewOptions(mtops...)
-
-	// apply requested options
-	for _, o := range opts {
-		o(&options)
-	}
 
 	// kubernetes client
 	client := client.NewClusterClient()

runtime/kubernetes/service.go

@@ -5,7 +5,7 @@ import (
 	"strings"
 	"time"
 
-	"go-micro.dev/v4/logger"
+	log "go-micro.dev/v4/logger"
 	"go-micro.dev/v4/runtime"
 	"go-micro.dev/v4/util/kubernetes/api"
 	"go-micro.dev/v4/util/kubernetes/client"
@@ -18,6 +18,8 @@ type service struct {
 	kservice *client.Service
 	// Kubernetes deployment
 	kdeploy *client.Deployment
+	// to be used logger
+	logger log.Logger
 }
 
 func parseError(err error) *api.Status {
@@ -26,7 +28,7 @@ func parseError(err error) *api.Status {
 	return status
 }
 
-func newService(s *runtime.Service, c runtime.CreateOptions) *service {
+func newService(s *runtime.Service, c runtime.CreateOptions, l log.Logger) *service {
 	// use pre-formatted name/version
 	name := client.Format(s.Name)
 	version := client.Format(s.Version)
@@ -93,6 +95,7 @@ func newService(s *runtime.Service, c runtime.CreateOptions) *service {
 		Service:  s,
 		kservice: kservice,
 		kdeploy:  kdeploy,
+		logger:   log.LoggerOrDefault(l),
 	}
 }
 
@@ -116,9 +119,7 @@ func serviceResource(s *client.Service) *client.Resource {
 func (s *service) Start(k client.Client, opts ...client.CreateOption) error {
 	// create deployment first; if we fail, we dont create service
 	if err := k.Create(deploymentResource(s.kdeploy), opts...); err != nil {
-		if logger.V(logger.DebugLevel, logger.DefaultLogger) {
+		s.logger.Logf(log.DebugLevel, "Runtime failed to create deployment: %v", err)
-			logger.Debugf("Runtime failed to create deployment: %v", err)
-		}
 		s.Status("error", err)
 		v := parseError(err)
 		if v.Reason == "AlreadyExists" {
@@ -128,9 +129,7 @@ func (s *service) Start(k client.Client, opts ...client.CreateOption) error {
 	}
 	// create service now that the deployment has been created
 	if err := k.Create(serviceResource(s.kservice), opts...); err != nil {
-		if logger.V(logger.DebugLevel, logger.DefaultLogger) {
+		s.logger.Logf(log.DebugLevel, "Runtime failed to create service: %v", err)
-			logger.Debugf("Runtime failed to create service: %v", err)
-		}
 		s.Status("error", err)
 		v := parseError(err)
 		if v.Reason == "AlreadyExists" {
@@ -147,17 +146,13 @@ func (s *service) Start(k client.Client, opts ...client.CreateOption) error {
 func (s *service) Stop(k client.Client, opts ...client.DeleteOption) error {
 	// first attempt to delete service
 	if err := k.Delete(serviceResource(s.kservice), opts...); err != nil {
-		if logger.V(logger.DebugLevel, logger.DefaultLogger) {
+		s.logger.Logf(log.DebugLevel, "Runtime failed to delete service: %v", err)
-			logger.Debugf("Runtime failed to delete service: %v", err)
-		}
 		s.Status("error", err)
 		return err
 	}
 	// delete deployment once the service has been deleted
 	if err := k.Delete(deploymentResource(s.kdeploy), opts...); err != nil {
-		if logger.V(logger.DebugLevel, logger.DefaultLogger) {
+		s.logger.Logf(log.DebugLevel, "Runtime failed to delete deployment: %v", err)
-			logger.Debugf("Runtime failed to delete deployment: %v", err)
-		}
 		s.Status("error", err)
 		return err
 	}
@@ -169,16 +164,12 @@ func (s *service) Stop(k client.Client, opts ...client.DeleteOption) error {
 
 func (s *service) Update(k client.Client, opts ...client.UpdateOption) error {
 	if err := k.Update(deploymentResource(s.kdeploy), opts...); err != nil {
-		if logger.V(logger.DebugLevel, logger.DefaultLogger) {
+		s.logger.Logf(log.DebugLevel, "Runtime failed to update deployment: %v", err)
-			logger.Debugf("Runtime failed to update deployment: %v", err)
-		}
 		s.Status("error", err)
 		return err
 	}
 	if err := k.Update(serviceResource(s.kservice), opts...); err != nil {
-		if logger.V(logger.DebugLevel, logger.DefaultLogger) {
+		s.logger.Logf(log.DebugLevel, "Runtime failed to update service: %v", err)
-			logger.Debugf("Runtime failed to update service: %v", err)
-		}
 		return err
 	}
 

runtime/local/build/docker/docker.go

@@ -84,7 +84,7 @@ func NewBuilder(opts ...build.Option) build.Builder {
 	endpoint := "unix:///var/run/docker.sock"
 	client, err := docker.NewClient(endpoint)
 	if err != nil {
-		logger.Fatal(err)
+		logger.Log(logger.FatalLevel, err)
 	}
 	return &Builder{
 		Options: options,

runtime/options.go

@@ -5,6 +5,7 @@ import (
 	"io"
 
 	"go-micro.dev/v4/client"
+	"go-micro.dev/v4/logger"
 )
 
 type Option func(o *Options)
@@ -21,6 +22,20 @@ type Options struct {
 	Image string
 	// Client to use when making requests
 	Client client.Client
+	// Logger underline logger
+	Logger logger.Logger
+}
+
+func NewOptions(opts ...Option) *Options {
+	options := &Options{
+		Logger: logger.DefaultLogger,
+	}
+
+	for _, o := range opts {
+		o(options)
+	}
+
+	return options
 }
 
 // WithSource sets the base image / repository
@@ -58,6 +73,13 @@ func WithClient(c client.Client) Option {
 	}
 }
 
+// WithLogger sets the underline logger
+func WithLogger(l logger.Logger) Option {
+	return func(o *Options) {
+		o.Logger = l
+	}
+}
+
 type CreateOption func(o *CreateOptions)
 
 type ReadOption func(o *ReadOptions)

runtime/service.go

@@ -8,7 +8,7 @@ import (
 	"sync"
 	"time"
 
-	"go-micro.dev/v4/logger"
+	log "go-micro.dev/v4/logger"
 	"go-micro.dev/v4/runtime/local/build"
 	"go-micro.dev/v4/runtime/local/process"
 	proc "go-micro.dev/v4/runtime/local/process/os"
@@ -36,9 +36,11 @@ type service struct {
 	Exec *process.Executable
 	// process pid
 	PID *process.PID
+	// to be used logger
+	Logger log.Logger
 }
 
-func newService(s *Service, c CreateOptions) *service {
+func newService(s *Service, c CreateOptions, l log.Logger) *service {
 	var exec string
 	var args []string
 
@@ -58,6 +60,7 @@ func newService(s *Service, c CreateOptions) *service {
 			Args: args,
 			Dir:  s.Source,
 		},
+		Logger:     log.LoggerOrDefault(l),
 		closed:     make(chan bool),
 		output:     c.Output,
 		updated:    time.Now(),
@@ -101,7 +104,6 @@ func (s *service) Start() error {
 	if !s.shouldStart() {
 		return nil
 	}
-
 	// reset
 	s.err = nil
 	s.closed = make(chan bool)
@@ -113,9 +115,7 @@ func (s *service) Start() error {
 	s.Status("starting", nil)
 
 	// TODO: pull source & build binary
-	if logger.V(logger.DebugLevel, logger.DefaultLogger) {
+	s.Logger.Log(log.DebugLevel, "Runtime service %s forking new process", s.Service.Name)
-		logger.Debugf("Runtime service %s forking new process", s.Service.Name)
-	}
 
 	p, err := s.Process.Fork(s.Exec)
 	if err != nil {
@@ -207,15 +207,13 @@ func (s *service) Wait() {
 
 	if s.PID.ID != thisPID.ID {
 		// trying to update when it's already been switched out, ignore
-		logger.Warnf("Trying to update a process status but PID doesn't match. Old %s, New %s. Skipping update.", thisPID.ID, s.PID.ID)
+		s.Logger.Logf(log.WarnLevel, "Trying to update a process status but PID doesn't match. Old %s, New %s. Skipping update.", thisPID.ID, s.PID.ID)
 		return
 	}
 
 	// save the error
 	if err != nil {
-		if logger.V(logger.ErrorLevel, logger.DefaultLogger) {
+		s.Logger.Logf(log.ErrorLevel, "Service %s terminated with error %s", s.Name, err)
-			logger.Errorf("Service %s terminated with error %s", s.Name, err)
-		}
 		s.retries++
 		s.Status("error", err)
 		s.Metadata["retries"] = strconv.Itoa(s.retries)

selector/options.go

@@ -3,6 +3,7 @@ package selector
 import (
 	"context"
 
+	"go-micro.dev/v4/logger"
 	"go-micro.dev/v4/registry"
 )
 
@@ -13,6 +14,8 @@ type Options struct {
 	// Other options for implementations of the interface
 	// can be stored in a context
 	Context context.Context
+	// Logger is the underline logger
+	Logger logger.Logger
 }
 
 type SelectOptions struct {
@@ -58,3 +61,10 @@ func WithStrategy(fn Strategy) SelectOption {
 		o.Strategy = fn
 	}
 }
+
+// WithLogger sets the underline logger
+func WithLogger(l logger.Logger) Option {
+	return func(o *Options) {
+		o.Logger = l
+	}
+}

server/options.go

@@ -9,10 +9,36 @@ import (
 	"go-micro.dev/v4/broker"
 	"go-micro.dev/v4/codec"
 	"go-micro.dev/v4/debug/trace"
+	"go-micro.dev/v4/logger"
 	"go-micro.dev/v4/registry"
 	"go-micro.dev/v4/transport"
 )
 
+type RouterOptions struct {
+	Logger logger.Logger
+}
+
+type RouterOption func(o *RouterOptions)
+
+func newRouterOptions(opt ...RouterOption) RouterOptions {
+	opts := RouterOptions{
+		Logger: logger.DefaultLogger,
+	}
+
+	for _, o := range opt {
+		o(&opts)
+	}
+
+	return opts
+}
+
+// WithRouterLogger sets the underline router logger
+func WithRouterLogger(l logger.Logger) RouterOption {
+	return func(o *RouterOptions) {
+		o.Logger = l
+	}
+}
+
 type Options struct {
 	Codecs        map[string]codec.NewCodec
 	Broker        broker.Broker
@@ -28,6 +54,7 @@ type Options struct {
 	HdlrWrappers  []HandlerWrapper
 	SubWrappers   []SubscriberWrapper
 	ListenOptions []transport.ListenOption
+	Logger        logger.Logger
 
 	// RegisterCheck runs a check function before registering the service
 	RegisterCheck func(context.Context) error
@@ -53,6 +80,7 @@ func newOptions(opt ...Option) Options {
 		Metadata:         map[string]string{},
 		RegisterInterval: DefaultRegisterInterval,
 		RegisterTTL:      DefaultRegisterTTL,
+		Logger:           logger.DefaultLogger,
 	}
 
 	for _, o := range opt {
@@ -228,6 +256,13 @@ func WithRouter(r Router) Option {
 	}
 }
 
+// WithLogger sets the underline logger
+func WithLogger(l logger.Logger) Option {
+	return func(o *Options) {
+		o.Logger = l
+	}
+}
+
 // Wait tells the server to wait for requests to finish before exiting
 // If `wg` is nil, server only wait for completion of rpc handler.
 // For user need finer grained control, pass a concrete `wg` here, server will

server/rpc_router.go

@@ -20,11 +20,12 @@ import (
 
 	"go-micro.dev/v4/codec"
 	merrors "go-micro.dev/v4/errors"
-	"go-micro.dev/v4/logger"
+
+	log "go-micro.dev/v4/logger"
 )
 
 var (
-	lastStreamResponseError = errors.New("EOS")
+	errLastStreamResponse = errors.New("EOS")
 
 	// Precompute the reflect type for error. Can't use error directly
 	// because Typeof takes an empty interface value. This is annoying.
@@ -60,6 +61,7 @@ type response struct {
 // router represents an RPC router.
 type router struct {
 	name string
+	ops  RouterOptions
 
 	mu         sync.Mutex // protects the serviceMap
 	serviceMap map[string]*service
@@ -93,8 +95,9 @@ func (r rpcRouter) ServeRequest(ctx context.Context, req Request, rsp Response)
 	return r.h(ctx, req, rsp)
 }
 
-func newRpcRouter() *router {
+func newRpcRouter(opts ...RouterOption) *router {
 	return &router{
+		ops:         newRouterOptions(opts...),
 		serviceMap:  make(map[string]*service),
 		subscribers: make(map[string][]*subscriber),
 	}
@@ -118,7 +121,7 @@ func isExportedOrBuiltinType(t reflect.Type) bool {
 
 // prepareMethod returns a methodType for the provided method or nil
 // in case if the method was unsuitable.
-func prepareMethod(method reflect.Method) *methodType {
+func prepareMethod(method reflect.Method, logger log.Logger) *methodType {
 	mtype := method.Type
 	mname := method.Name
 	var replyType, argType, contextType reflect.Type
@@ -141,7 +144,7 @@ func prepareMethod(method reflect.Method) *methodType {
 		replyType = mtype.In(3)
 		contextType = mtype.In(1)
 	default:
-		logger.Errorf("method %v of %v has wrong number of ins: %v", mname, mtype, mtype.NumIn())
+		logger.Logf(log.ErrorLevel, "method %v of %v has wrong number of ins: %v", mname, mtype, mtype.NumIn())
 		return nil
 	}
 
@@ -149,7 +152,7 @@ func prepareMethod(method reflect.Method) *methodType {
 		// check stream type
 		streamType := reflect.TypeOf((*Stream)(nil)).Elem()
 		if !argType.Implements(streamType) {
-			logger.Errorf("%v argument does not implement Stream interface: %v", mname, argType)
+			logger.Logf(log.ErrorLevel, "%v argument does not implement Stream interface: %v", mname, argType)
 			return nil
 		}
 	} else {
@@ -157,30 +160,30 @@ func prepareMethod(method reflect.Method) *methodType {
 
 		// First arg need not be a pointer.
 		if !isExportedOrBuiltinType(argType) {
-			logger.Errorf("%v argument type not exported: %v", mname, argType)
+			logger.Logf(log.ErrorLevel, "%v argument type not exported: %v", mname, argType)
 			return nil
 		}
 
 		if replyType.Kind() != reflect.Ptr {
-			logger.Errorf("method %v reply type not a pointer: %v", mname, replyType)
+			logger.Logf(log.ErrorLevel, "method %v reply type not a pointer: %v", mname, replyType)
 			return nil
 		}
 
 		// Reply type must be exported.
 		if !isExportedOrBuiltinType(replyType) {
-			logger.Errorf("method %v reply type not exported: %v", mname, replyType)
+			logger.Logf(log.ErrorLevel, "method %v reply type not exported: %v", mname, replyType)
 			return nil
 		}
 	}
 
 	// Method needs one out.
 	if mtype.NumOut() != 1 {
-		logger.Errorf("method %v has wrong number of outs: %v", mname, mtype.NumOut())
+		logger.Logf(log.ErrorLevel, "method %v has wrong number of outs: %v", mname, mtype.NumOut())
 		return nil
 	}
 	// The return type of the method must be error.
 	if returnType := mtype.Out(0); returnType != typeOfError {
-		logger.Errorf("method %v returns %v not error", mname, returnType.String())
+		logger.Logf(log.ErrorLevel, "method %v returns %v not error", mname, returnType.String())
 		return nil
 	}
 	return &methodType{method: method, ArgType: argType, ReplyType: replyType, ContextType: contextType, stream: stream}
@@ -266,7 +269,7 @@ func (s *service) call(ctx context.Context, router *router, sending *sync.Mutex,
 			return nil
 		} else {
 			// no error, we send the special EOS error
-			return lastStreamResponseError
+			return errLastStreamResponse
 		}
 	}
 
@@ -446,7 +449,7 @@ func (router *router) Handle(h Handler) error {
 	// Install the methods
 	for m := 0; m < s.typ.NumMethod(); m++ {
 		method := s.typ.Method(m)
-		if mt := prepareMethod(method); mt != nil {
+		if mt := prepareMethod(method, router.ops.Logger); mt != nil {
 			s.method[method.Name] = mt
 		}
 	}
@@ -509,8 +512,8 @@ func (router *router) ProcessMessage(ctx context.Context, msg Message) (err erro
 	defer func() {
 		// recover any panics
 		if r := recover(); r != nil {
-			logger.Errorf("panic recovered: %v", r)
+			router.ops.Logger.Logf(log.ErrorLevel, "panic recovered: %v", r)
-			logger.Error(string(debug.Stack()))
+			router.ops.Logger.Log(log.ErrorLevel, string(debug.Stack()))
 			err = merrors.InternalServerError("go.micro.server", "panic recovered: %v", r)
 		}
 	}()

server/rpc_server.go

@@ -15,7 +15,8 @@ import (
 	"go-micro.dev/v4/broker"
 	"go-micro.dev/v4/codec"
 	raw "go-micro.dev/v4/codec/bytes"
-	"go-micro.dev/v4/logger"
+
+	log "go-micro.dev/v4/logger"
 	"go-micro.dev/v4/metadata"
 	"go-micro.dev/v4/registry"
 	"go-micro.dev/v4/transport"
@@ -131,6 +132,7 @@ func (s *rpcServer) HandleEvent(e broker.Event) error {
 
 // ServeConn serves a single connection
 func (s *rpcServer) ServeConn(sock transport.Socket) {
+	logger := s.opts.Logger
 	// global error tracking
 	var gerr error
 	// streams are multiplexed on Micro-Stream or Micro-Id header
@@ -161,10 +163,8 @@ func (s *rpcServer) ServeConn(sock transport.Socket) {
 
 		// recover any panics
 		if r := recover(); r != nil {
-			if logger.V(logger.ErrorLevel, logger.DefaultLogger) {
+			logger.Log(log.ErrorLevel, "panic recovered: ", r)
-				logger.Error("panic recovered: ", r)
+			logger.Log(log.ErrorLevel, string(debug.Stack()))
-				logger.Error(string(debug.Stack()))
-			}
 		}
 	}()
 
@@ -227,7 +227,7 @@ func (s *rpcServer) ServeConn(sock transport.Socket) {
 		if !ok && stream {
 			// check if its a last stream EOS error
 			err := msg.Header["Micro-Error"]
-			if err == lastStreamResponseError.Error() {
+			if err == errLastStreamResponse.Error() {
 				pool.Release(psock)
 				continue
 			}
@@ -383,10 +383,8 @@ func (s *rpcServer) ServeConn(sock transport.Socket) {
 
 				// recover any panics for outbound process
 				if r := recover(); r != nil {
-					if logger.V(logger.ErrorLevel, logger.DefaultLogger) {
+					logger.Log(log.ErrorLevel, "panic recovered: ", r)
-						logger.Error("panic recovered: ", r)
+					logger.Log(log.ErrorLevel, string(debug.Stack()))
-						logger.Error(string(debug.Stack()))
-					}
 				}
 			}()
 
@@ -414,8 +412,8 @@ func (s *rpcServer) ServeConn(sock transport.Socket) {
 
 				// recover any panics for call handler
 				if r := recover(); r != nil {
-					logger.Error("panic recovered: ", r)
+					logger.Log(log.ErrorLevel, "panic recovered: ", r)
-					logger.Error(string(debug.Stack()))
+					logger.Log(log.ErrorLevel, string(debug.Stack()))
 				}
 			}()
 
@@ -430,11 +428,11 @@ func (s *rpcServer) ServeConn(sock transport.Socket) {
 
 				// if the server request is an EOS error we let the socket know
 				// sometimes the socket is already closed on the other side, so we can ignore that error
-				alreadyClosed := serveRequestError == lastStreamResponseError && writeError == io.EOF
+				alreadyClosed := serveRequestError == errLastStreamResponse && writeError == io.EOF
 
 				// could not write error response
 				if writeError != nil && !alreadyClosed {
-					logger.Debugf("rpc: unable to write error response: %v", writeError)
+					logger.Logf(log.DebugLevel, "rpc: unable to write error response: %v", writeError)
 				}
 			}
 		}(id, psock)
@@ -517,7 +515,7 @@ func (s *rpcServer) Register() error {
 	rsvc := s.rsvc
 	config := s.Options()
 	s.RUnlock()
-
+	logger := s.opts.Logger
 	regFunc := func(service *registry.Service) error {
 		// create registry options
 		rOpts := []registry.RegisterOption{registry.RegisterTTL(config.RegisterTTL)}
@@ -650,9 +648,7 @@ func (s *rpcServer) Register() error {
 	s.RUnlock()
 
 	if !registered {
-		if logger.V(logger.InfoLevel, logger.DefaultLogger) {
+		logger.Logf(log.InfoLevel, "Registry [%s] Registering node: %s", config.Registry.String(), node.Id)
-			logger.Infof("Registry [%s] Registering node: %s", config.Registry.String(), node.Id)
-		}
 	}
 
 	// register the service
@@ -702,9 +698,7 @@ func (s *rpcServer) Register() error {
 		if err != nil {
 			return err
 		}
-		if logger.V(logger.InfoLevel, logger.DefaultLogger) {
+		logger.Logf(log.InfoLevel, "Subscribing to topic: %s", sub.Topic())
-			logger.Infof("Subscribing to topic: %s", sub.Topic())
-		}
 		s.subscribers[sb] = []broker.Subscriber{sub}
 	}
 	if cacheService {
@@ -718,7 +712,7 @@ func (s *rpcServer) Register() error {
 func (s *rpcServer) Deregister() error {
 	var err error
 	var advt, host, port string
-
+	logger := s.opts.Logger
 	s.RLock()
 	config := s.Options()
 	s.RUnlock()
@@ -763,9 +757,7 @@ func (s *rpcServer) Deregister() error {
 		Nodes:   []*registry.Node{node},
 	}
 
-	if logger.V(logger.InfoLevel, logger.DefaultLogger) {
+	logger.Logf(log.InfoLevel, "Registry [%s] Deregistering node: %s", config.Registry.String(), node.Id)
-		logger.Infof("Registry [%s] Deregistering node: %s", config.Registry.String(), node.Id)
-	}
 	if err := config.Registry.Deregister(service); err != nil {
 		return err
 	}
@@ -788,9 +780,7 @@ func (s *rpcServer) Deregister() error {
 
 	for sb, subs := range s.subscribers {
 		for _, sub := range subs {
-			if logger.V(logger.InfoLevel, logger.DefaultLogger) {
+			logger.Logf(log.InfoLevel, "Unsubscribing %s from topic: %s", node.Id, sub.Topic())
-				logger.Infof("Unsubscribing %s from topic: %s", node.Id, sub.Topic())
-			}
 			sub.Unsubscribe()
 		}
 		s.subscribers[sb] = nil
@@ -807,7 +797,7 @@ func (s *rpcServer) Start() error {
 		return nil
 	}
 	s.RUnlock()
-
+	logger := s.opts.Logger
 	config := s.Options()
 
 	// start listening on the transport
@@ -816,9 +806,7 @@ func (s *rpcServer) Start() error {
 		return err
 	}
 
-	if logger.V(logger.InfoLevel, logger.DefaultLogger) {
+	logger.Logf(log.InfoLevel, "Transport [%s] Listening on %s", config.Transport.String(), ts.Addr())
-		logger.Infof("Transport [%s] Listening on %s", config.Transport.String(), ts.Addr())
-	}
 
 	// swap address
 	s.Lock()
@@ -830,27 +818,19 @@ func (s *rpcServer) Start() error {
 
 	// connect to the broker
 	if err := config.Broker.Connect(); err != nil {
-		if logger.V(logger.ErrorLevel, logger.DefaultLogger) {
+		logger.Logf(log.ErrorLevel, "Broker [%s] connect error: %v", bname, err)
-			logger.Errorf("Broker [%s] connect error: %v", bname, err)
-		}
 		return err
 	}
 
-	if logger.V(logger.InfoLevel, logger.DefaultLogger) {
+	logger.Logf(log.InfoLevel, "Broker [%s] Connected to %s", bname, config.Broker.Address())
-		logger.Infof("Broker [%s] Connected to %s", bname, config.Broker.Address())
-	}
 
 	// use RegisterCheck func before register
 	if err = s.opts.RegisterCheck(s.opts.Context); err != nil {
-		if logger.V(logger.ErrorLevel, logger.DefaultLogger) {
+		logger.Logf(log.ErrorLevel, "Server %s-%s register check error: %s", config.Name, config.Id, err)
-			logger.Errorf("Server %s-%s register check error: %s", config.Name, config.Id, err)
-		}
 	} else {
 		// announce self to the world
 		if err = s.Register(); err != nil {
-			if logger.V(logger.ErrorLevel, logger.DefaultLogger) {
+			logger.Logf(log.ErrorLevel, "Server %s-%s register error: %s", config.Name, config.Id, err)
-				logger.Errorf("Server %s-%s register error: %s", config.Name, config.Id, err)
-			}
 		}
 	}
 
@@ -871,9 +851,7 @@ func (s *rpcServer) Start() error {
 			// check the error and backoff
 			default:
 				if err != nil {
-					if logger.V(logger.ErrorLevel, logger.DefaultLogger) {
+					logger.Logf(log.ErrorLevel, "Accept error: %v", err)
-						logger.Errorf("Accept error: %v", err)
-					}
 					time.Sleep(time.Second)
 					continue
 				}
@@ -906,25 +884,17 @@ func (s *rpcServer) Start() error {
 				s.RUnlock()
 				rerr := s.opts.RegisterCheck(s.opts.Context)
 				if rerr != nil && registered {
-					if logger.V(logger.ErrorLevel, logger.DefaultLogger) {
+					logger.Logf(log.ErrorLevel, "Server %s-%s register check error: %s, deregister it", config.Name, config.Id, err)
-						logger.Errorf("Server %s-%s register check error: %s, deregister it", config.Name, config.Id, err)
-					}
 					// deregister self in case of error
 					if err := s.Deregister(); err != nil {
-						if logger.V(logger.ErrorLevel, logger.DefaultLogger) {
+						logger.Logf(log.ErrorLevel, "Server %s-%s deregister error: %s", config.Name, config.Id, err)
-							logger.Errorf("Server %s-%s deregister error: %s", config.Name, config.Id, err)
-						}
 					}
 				} else if rerr != nil && !registered {
-					if logger.V(logger.ErrorLevel, logger.DefaultLogger) {
+					logger.Logf(log.ErrorLevel, "Server %s-%s register check error: %s", config.Name, config.Id, err)
-						logger.Errorf("Server %s-%s register check error: %s", config.Name, config.Id, err)
-					}
 					continue
 				}
 				if err := s.Register(); err != nil {
-					if logger.V(logger.ErrorLevel, logger.DefaultLogger) {
+					logger.Logf(log.ErrorLevel, "Server %s-%s register error: %s", config.Name, config.Id, err)
-						logger.Errorf("Server %s-%s register error: %s", config.Name, config.Id, err)
-					}
 				}
 			// wait for exit
 			case ch = <-s.exit:
@@ -940,9 +910,7 @@ func (s *rpcServer) Start() error {
 		if registered {
 			// deregister self
 			if err := s.Deregister(); err != nil {
-				if logger.V(logger.ErrorLevel, logger.DefaultLogger) {
+				logger.Logf(log.ErrorLevel, "Server %s-%s deregister error: %s", config.Name, config.Id, err)
-					logger.Errorf("Server %s-%s deregister error: %s", config.Name, config.Id, err)
-				}
 			}
 		}
 
@@ -958,14 +926,10 @@ func (s *rpcServer) Start() error {
 		// close transport listener
 		ch <- ts.Close()
 
-		if logger.V(logger.InfoLevel, logger.DefaultLogger) {
+		logger.Logf(log.InfoLevel, "Broker [%s] Disconnected from %s", bname, config.Broker.Address())
-			logger.Infof("Broker [%s] Disconnected from %s", bname, config.Broker.Address())
-		}
 		// disconnect the broker
 		if err := config.Broker.Disconnect(); err != nil {
-			if logger.V(logger.ErrorLevel, logger.DefaultLogger) {
+			logger.Logf(log.ErrorLevel, "Broker [%s] Disconnect error: %v", bname, err)
-				logger.Errorf("Broker [%s] Disconnect error: %v", bname, err)
-			}
 		}
 
 		// swap back address

server/rpc_stream.go

@@ -65,7 +65,7 @@ func (r *rpcStream) Recv(msg interface{}) error {
 	if len(req.Error) > 0 {
 		// Check the client closed the stream
 		switch req.Error {
-		case lastStreamResponseError.Error():
+		case errLastStreamResponse.Error():
 			// discard body
 			r.Unlock()
 			r.codec.ReadBody(nil)

server/server.go

@@ -8,8 +8,9 @@ import (
 	"time"
 
 	"github.com/google/uuid"
+
 	"go-micro.dev/v4/codec"
-	"go-micro.dev/v4/logger"
+	log "go-micro.dev/v4/logger"
 	"go-micro.dev/v4/registry"
 	signalutil "go-micro.dev/v4/util/signal"
 )
@@ -116,7 +117,6 @@ type Stream interface {
 //	func (g *Greeter) Hello(context, request, response) error {
 //	        return nil
 //	}
-//
 type Handler interface {
 	Name() string
 	Handler() interface{}
@@ -184,7 +184,6 @@ func NewSubscriber(topic string, h interface{}, opts ...SubscriberOption) Subscr
 //	func (f *Foo) Bar(ctx, req, rsp) error {
 //		return nil
 //	}
-//
 func NewHandler(h interface{}, opts ...HandlerOption) Handler {
 	return DefaultServer.NewHandler(h, opts...)
 }
@@ -210,27 +209,21 @@ func Run() error {
 
 	ch := make(chan os.Signal, 1)
 	signal.Notify(ch, signalutil.Shutdown()...)
+	DefaultServer.Options().Logger.Logf(log.InfoLevel, "Received signal %s", <-ch)
 
-	if logger.V(logger.InfoLevel, logger.DefaultLogger) {
-		logger.Infof("Received signal %s", <-ch)
-	}
 	return Stop()
 }
 
 // Start starts the default server
 func Start() error {
 	config := DefaultServer.Options()
-	if logger.V(logger.InfoLevel, logger.DefaultLogger) {
+	config.Logger.Logf(log.InfoLevel, "Starting server %s id %s", config.Name, config.Id)
-		logger.Infof("Starting server %s id %s", config.Name, config.Id)
-	}
 	return DefaultServer.Start()
 }
 
 // Stop stops the default server
 func Stop() error {
-	if logger.V(logger.InfoLevel, logger.DefaultLogger) {
+	DefaultServer.Options().Logger.Logf(log.InfoLevel, "Stopping server")
-		logger.Infof("Stopping server")
-	}
 	return DefaultServer.Stop()
 }
 

service.go

@@ -7,7 +7,7 @@ import (
 	"sync"
 
 	"go-micro.dev/v4/client"
-	"go-micro.dev/v4/logger"
+	log "go-micro.dev/v4/logger"
 	"go-micro.dev/v4/server"
 	"go-micro.dev/v4/store"
 	"go-micro.dev/v4/util/cmd"
@@ -58,14 +58,14 @@ func (s *service) Init(opts ...Option) {
 			cmd.Store(&s.opts.Store),
 			cmd.Profile(&s.opts.Profile),
 		); err != nil {
-			logger.Fatal(err)
+			s.opts.Logger.Log(log.FatalLevel, err)
 		}
 
 		// Explicitly set the table name to the service name
 		name := s.opts.Cmd.App().Name
 		err := s.opts.Store.Init(store.Table(name))
 		if err != nil {
-			logger.Fatal(err)
+			s.opts.Logger.Log(log.FatalLevel, err)
 		}
 	})
 }
@@ -125,6 +125,8 @@ func (s *service) Stop() error {
 }
 
 func (s *service) Run() (err error) {
+	logger := s.opts.Logger
+
 	// exit when help flag is provided
 	for _, v := range os.Args[1:] {
 		if v == "-h" || v == "--help" {
@@ -145,14 +147,12 @@ func (s *service) Run() (err error) {
 		defer func() {
 			err = s.opts.Profile.Stop()
 			if err != nil {
-				logger.Error(err)
+				logger.Log(log.ErrorLevel, err)
 			}
 		}()
 	}
 
-	if logger.V(logger.InfoLevel, logger.DefaultLogger) {
+	logger.Logf(log.InfoLevel, "Starting [service] %s", s.Name())
-		logger.Infof("Starting [service] %s", s.Name())
-	}
 
 	if err = s.Start(); err != nil {
 		return err

store/options.go

@@ -5,6 +5,7 @@ import (
 	"time"
 
 	"go-micro.dev/v4/client"
+	"go-micro.dev/v4/logger"
 )
 
 // Options contains configuration for the Store
@@ -21,6 +22,8 @@ type Options struct {
 	Context context.Context
 	// Client to use for RPC
 	Client client.Client
+	// Logger is the underline logger
+	Logger logger.Logger
 }
 
 // Option sets values in Options
@@ -63,6 +66,13 @@ func WithClient(c client.Client) Option {
 	}
 }
 
+// WithLogger sets the underline logger
+func WithLogger(l logger.Logger) Option {
+	return func(o *Options) {
+		o.Logger = l
+	}
+}
+
 // ReadOptions configures an individual Read operation
 type ReadOptions struct {
 	Database, Table string

sync/options.go

@@ -4,6 +4,8 @@ import (
 	"context"
 	"crypto/tls"
 	"time"
+
+	"go-micro.dev/v4/logger"
 )
 
 // Nodes sets the addresses to use
@@ -47,3 +49,10 @@ func WithContext(c context.Context) Option {
 		o.Context = c
 	}
 }
+
+// WithLogger sets the underline logger
+func WithLogger(l logger.Logger) Option {
+	return func(o *Options) {
+		o.Logger = l
+	}
+}

sync/sync.go

@@ -6,6 +6,8 @@ import (
 	"crypto/tls"
 	"errors"
 	"time"
+
+	"go-micro.dev/v4/logger"
 )
 
 var (
@@ -41,6 +43,7 @@ type Options struct {
 	Prefix    string
 	TLSConfig *tls.Config
 	Context   context.Context
+	Logger    logger.Logger
 }
 
 type Option func(o *Options)

transport/options.go

@@ -7,6 +7,7 @@ import (
 	"time"
 
 	"go-micro.dev/v4/codec"
+	"go-micro.dev/v4/logger"
 )
 
 type Options struct {
@@ -27,6 +28,8 @@ type Options struct {
 	// Other options for implementations of the interface
 	// can be stored in a context
 	Context context.Context
+	// Logger is the underline logger
+	Logger logger.Logger
 }
 
 type DialOptions struct {
@@ -104,6 +107,13 @@ func WithTimeout(d time.Duration) DialOption {
 	}
 }
 
+// WithLogger sets the underline logger
+func WithLogger(l logger.Logger) Option {
+	return func(o *Options) {
+		o.Logger = l
+	}
+}
+
 // NetListener Set net.Listener for httpTransport
 func NetListener(customListener net.Listener) ListenOption {
 	return func(o *ListenOptions) {

util/file/client.go

@@ -3,13 +3,12 @@ package file
 import (
 	"bufio"
 	"context"
-	"errors"
 	"fmt"
 	"io"
-	"log"
 	"os"
 
 	"go-micro.dev/v4/client"
+	"go-micro.dev/v4/logger"
 	proto "go-micro.dev/v4/util/file/proto"
 )
 
@@ -145,7 +144,7 @@ func (c *fc) DownloadAt(filename, saveFile string, blockId int) error {
 		return err
 	}
 	if stat.Type == "Directory" {
-		return errors.New(fmt.Sprintf("%s is directory.", filename))
+		return fmt.Errorf("%s is directory", filename)
 	}
 
 	blocks := int(stat.Size / blockSize)
@@ -153,7 +152,7 @@ func (c *fc) DownloadAt(filename, saveFile string, blockId int) error {
 		blocks += 1
 	}
 
-	log.Printf("Download %s in %d blocks\n", filename, blocks-blockId)
+	logger.Logf(logger.InfoLevel, "Download %s in %d blocks\n", filename, blocks-blockId)
 
 	file, err := os.OpenFile(saveFile, os.O_CREATE|os.O_WRONLY, 0666)
 	if err != nil {
@@ -176,14 +175,14 @@ func (c *fc) DownloadAt(filename, saveFile string, blockId int) error {
 		}
 
 		if i%((blocks-blockId)/100+1) == 0 {
-			log.Printf("Downloading %s [%d/%d] blocks", filename, i-blockId+1, blocks-blockId)
+			logger.Logf(logger.InfoLevel, "Downloading %s [%d/%d] blocks", filename, i-blockId+1, blocks-blockId)
 		}
 
 		if rerr == io.EOF {
 			break
 		}
 	}
-	log.Printf("Download %s completed", filename)
+	logger.Logf(logger.InfoLevel, "Download %s completed", filename)
 
 	c.Close(sessionId)
 

util/file/handler.go

@@ -6,11 +6,12 @@ import (
 	"path/filepath"
 	"sync"
 
+	"golang.org/x/net/context"
+
 	"go-micro.dev/v4/errors"
-	"go-micro.dev/v4/logger"
+	log "go-micro.dev/v4/logger"
 	"go-micro.dev/v4/server"
 	proto "go-micro.dev/v4/util/file/proto"
-	"golang.org/x/net/context"
 )
 
 // NewHandler is a handler that can be registered with a micro Server
@@ -20,6 +21,7 @@ func NewHandler(readDir string) proto.FileHandler {
 		session: &session{
 			files: make(map[int64]*os.File),
 		},
+		logger: log.DefaultLogger,
 	}
 }
 
@@ -31,6 +33,7 @@ func RegisterHandler(s server.Server, readDir string) {
 type handler struct {
 	readDir string
 	session *session
+	logger  log.Logger
 }
 
 func (h *handler) Open(ctx context.Context, req *proto.OpenRequest, rsp *proto.OpenResponse) error {
@@ -47,14 +50,14 @@ func (h *handler) Open(ctx context.Context, req *proto.OpenRequest, rsp *proto.O
 	rsp.Id = h.session.Add(file)
 	rsp.Result = true
 
-	logger.Debugf("Open %s, sessionId=%d", req.Filename, rsp.Id)
+	h.logger.Logf(log.DebugLevel, "Open %s, sessionId=%d", req.Filename, rsp.Id)
 
 	return nil
 }
 
 func (h *handler) Close(ctx context.Context, req *proto.CloseRequest, rsp *proto.CloseResponse) error {
 	h.session.Delete(req.Id)
-	logger.Debugf("Close sessionId=%d", req.Id)
+	h.logger.Logf(log.DebugLevel, "Close sessionId=%d", req.Id)
 	return nil
 }
 
@@ -73,7 +76,7 @@ func (h *handler) Stat(ctx context.Context, req *proto.StatRequest, rsp *proto.S
 	}
 
 	rsp.LastModified = fi.ModTime().Unix()
-	logger.Debugf("Stat %s, %#v", req.Filename, rsp)
+	h.logger.Logf(log.DebugLevel, "Stat %s, %#v", req.Filename, rsp)
 
 	return nil
 }
@@ -97,7 +100,7 @@ func (h *handler) Read(ctx context.Context, req *proto.ReadRequest, rsp *proto.R
 	rsp.Size = int64(n)
 	rsp.Data = rsp.Data[:n]
 
-	logger.Debugf("Read sessionId=%d, Offset=%d, n=%d", req.Id, req.Offset, rsp.Size)
+	h.logger.Logf(log.DebugLevel, "Read sessionId=%d, Offset=%d, n=%d", req.Id, req.Offset, rsp.Size)
 
 	return nil
 }
@@ -112,7 +115,7 @@ func (h *handler) Write(ctx context.Context, req *proto.WriteRequest, rsp *proto
 		return err
 	}
 
-	logger.Debugf("Write sessionId=%d, Offset=%d, n=%d", req.Id, req.Offset)
+	h.logger.Logf(log.DebugLevel, "Write sessionId=%d, Offset=%d, n=%d", req.Id, req.Offset)
 
 	return nil
 }

util/http/http.go

@@ -4,10 +4,10 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
-	"log"
 	"net/http"
 	"strings"
 
+	"go-micro.dev/v4/logger"
 	"go-micro.dev/v4/metadata"
 	"go-micro.dev/v4/registry"
 	"go-micro.dev/v4/selector"
@@ -39,7 +39,7 @@ func WriteInternalServerError(w http.ResponseWriter, err error) {
 		"error": err.Error(),
 	})
 	if err != nil {
-		log.Println(err)
+		logger.Log(logger.ErrorLevel, err)
 		return
 	}
 	Write(w, "application/json", 500, string(rawBody))

util/kubernetes/client/client.go

@@ -20,7 +20,7 @@ var (
 	// path to kubernetes service account token
 	serviceAccountPath = "/var/run/secrets/kubernetes.io/serviceaccount"
 	// ErrReadNamespace is returned when the names could not be read from service account
-	ErrReadNamespace = errors.New("Could not read namespace from service account secret")
+	ErrReadNamespace = errors.New("could not read namespace from service account secret")
 	// DefaultImage is default micro image
 	DefaultImage = "micro/go-micro"
 	// DefaultNamespace is the default k8s namespace
@@ -228,7 +228,7 @@ func (c *client) Watch(r *Resource, opts ...WatchOption) (Watcher, error) {
 // NewService returns default micro kubernetes service definition
 func NewService(name, version, typ, namespace string) *Service {
 	if logger.V(logger.TraceLevel, logger.DefaultLogger) {
-		logger.Tracef("kubernetes default service: name: %s, version: %s", name, version)
+		logger.Logf(logger.TraceLevel, "kubernetes default service: name: %s, version: %s", name, version)
 	}
 
 	Labels := map[string]string{
@@ -271,7 +271,7 @@ func NewService(name, version, typ, namespace string) *Service {
 // NewService returns default micro kubernetes deployment definition
 func NewDeployment(name, version, typ, namespace string) *Deployment {
 	if logger.V(logger.TraceLevel, logger.DefaultLogger) {
-		logger.Tracef("kubernetes default deployment: name: %s, version: %s", name, version)
+		logger.Logf(logger.TraceLevel, "kubernetes default deployment: name: %s, version: %s", name, version)
 	}
 
 	Labels := map[string]string{

util/mdns/client.go

@@ -3,7 +3,6 @@ package mdns
 import (
 	"context"
 	"fmt"
-	"log"
 	"net"
 	"strings"
 	"sync"
@@ -12,6 +11,8 @@ import (
 	"github.com/miekg/dns"
 	"golang.org/x/net/ipv4"
 	"golang.org/x/net/ipv6"
+
+	"go-micro.dev/v4/logger"
 )
 
 // ServiceEntry is returned after we query for a service
@@ -146,7 +147,7 @@ func Listen(entries chan<- *ServiceEntry, exit chan struct{}) error {
 				m.SetQuestion(e.Name, dns.TypePTR)
 				m.RecursionDesired = false
 				if err := client.sendQuery(m); err != nil {
-					log.Printf("[ERR] mdns: Failed to query instance %s: %v", e.Name, err)
+					logger.Logf(logger.ErrorLevel, "[mdns] failed to query instance %s: %v", e.Name, err)
 				}
 			}
 		}
@@ -184,7 +185,7 @@ func newClient() (*client, error) {
 	uconn4, err4 := net.ListenUDP("udp4", &net.UDPAddr{IP: net.IPv4zero, Port: 0})
 	uconn6, err6 := net.ListenUDP("udp6", &net.UDPAddr{IP: net.IPv6zero, Port: 0})
 	if err4 != nil && err6 != nil {
-		log.Printf("[ERR] mdns: Failed to bind to udp port: %v %v", err4, err6)
+		logger.Logf(logger.ErrorLevel, "[mdns] failed to bind to udp port: %v %v", err4, err6)
 	}
 
 	if uconn4 == nil && uconn6 == nil {
@@ -202,7 +203,7 @@ func newClient() (*client, error) {
 	mconn4, err4 := net.ListenUDP("udp4", mdnsWildcardAddrIPv4)
 	mconn6, err6 := net.ListenUDP("udp6", mdnsWildcardAddrIPv6)
 	if err4 != nil && err6 != nil {
-		log.Printf("[ERR] mdns: Failed to bind to udp port: %v %v", err4, err6)
+		logger.Logf(logger.ErrorLevel, "[mdns] failed to bind to udp port: %v %v", err4, err6)
 	}
 
 	if mconn4 == nil && mconn6 == nil {
@@ -239,7 +240,7 @@ func newClient() (*client, error) {
 	}
 
 	if len(ifaces) == errCount1 && len(ifaces) == errCount2 {
-		return nil, fmt.Errorf("Failed to join multicast group on all interfaces!")
+		return nil, fmt.Errorf("failed to join multicast group on all interfaces")
 	}
 
 	c := &client{
@@ -375,7 +376,7 @@ func (c *client) query(params *QueryParam) error {
 				m.SetQuestion(inp.Name, inp.Type)
 				m.RecursionDesired = false
 				if err := c.sendQuery(m); err != nil {
-					log.Printf("[ERR] mdns: Failed to query instance %s: %v", inp.Name, err)
+					logger.Logf(logger.ErrorLevel, "[mdns] failed to query instance %s: %v", inp.Name, err)
 				}
 			}
 		case <-params.Context.Done():

util/mdns/dns_sd.go

@@ -10,6 +10,7 @@ import "github.com/miekg/dns"
 // register only the wrapped instance with the server.
 //
 // Example usage:
+//
 //	    service := &mdns.DNSSDService{
 //	      MDNSService: &mdns.MDNSService{
 //		       Instance: "My Foobar Service",

util/qson/qson.go

@@ -45,9 +45,12 @@ func Unmarshal(dst interface{}, query string) error {
 }
 
 // ToJSON will turn a query string like:
+//
 //	cat=1&bar%5Bone%5D%5Btwo%5D=2&bar[one][red]=112
+//
 // Into a JSON object with all the data merged as nicely as
 // possible. Eg the example above would output:
+//
 //	{"bar":{"one":{"two":2,"red":112}}}
 func ToJSON(query string) ([]byte, error) {
 	var (
@@ -65,6 +68,7 @@ func ToJSON(query string) ([]byte, error) {
 }
 
 // queryToMap turns something like a[b][c]=4 into
+//
 //	  map[string]interface{}{
 //	    "a": map[string]interface{}{
 //			  "b": map[string]interface{}{

web/options.go

@@ -8,6 +8,7 @@ import (
 
 	"github.com/urfave/cli/v2"
 	"go-micro.dev/v4"
+	"go-micro.dev/v4/logger"
 	"go-micro.dev/v4/registry"
 )
 
@@ -37,6 +38,7 @@ type Options struct {
 
 	Registry registry.Registry
 	Service  micro.Service
+	Logger   logger.Logger
 
 	Secure      bool
 	TLSConfig   *tls.Config
@@ -63,6 +65,7 @@ func newOptions(opts ...Option) Options {
 		Service:          micro.NewService(),
 		Context:          context.TODO(),
 		Signal:           true,
+		Logger:           logger.DefaultLogger,
 	}
 
 	for _, o := range opts {
@@ -257,3 +260,10 @@ func HandleSignal(b bool) Option {
 		o.Signal = b
 	}
 }
+
+// Logger sets the underline logger
+func Logger(l logger.Logger) Option {
+	return func(o *Options) {
+		o.Logger = l
+	}
+}

web/service.go

@@ -13,8 +13,10 @@ import (
 	"time"
 
 	"github.com/urfave/cli/v2"
+
 	"go-micro.dev/v4"
-	"go-micro.dev/v4/logger"
+
+	log "go-micro.dev/v4/logger"
 	"go-micro.dev/v4/registry"
 	maddr "go-micro.dev/v4/util/addr"
 	"go-micro.dev/v4/util/backoff"
@@ -54,11 +56,13 @@ func (s *service) genSrv() *registry.Service {
 	var port string
 	var err error
 
+	logger := s.opts.Logger
+
 	// default host:port
 	if len(s.opts.Address) > 0 {
 		host, port, err = net.SplitHostPort(s.opts.Address)
 		if err != nil {
-			logger.Fatal(err)
+			logger.Log(log.FatalLevel, err)
 		}
 	}
 
@@ -68,13 +72,13 @@ func (s *service) genSrv() *registry.Service {
 	if len(s.opts.Advertise) > 0 {
 		host, port, err = net.SplitHostPort(s.opts.Advertise)
 		if err != nil {
-			logger.Fatal(err)
+			logger.Log(log.FatalLevel, err)
 		}
 	}
 
 	addr, err := maddr.Extract(host)
 	if err != nil {
-		logger.Fatal(err)
+		logger.Log(log.FatalLevel, err)
 	}
 
 	if strings.Count(addr, ":") > 0 {
@@ -120,6 +124,9 @@ func (s *service) register() error {
 	if s.srv == nil {
 		return nil
 	}
+
+	logger := s.opts.Logger
+
 	// default to service registry
 	r := s.opts.Service.Client().Options().Registry
 	// switch to option if specified
@@ -134,9 +141,7 @@ func (s *service) register() error {
 
 	// use RegisterCheck func before register
 	if err := s.opts.RegisterCheck(s.opts.Context); err != nil {
-		if logger.V(logger.ErrorLevel, logger.DefaultLogger) {
+		logger.Logf(log.ErrorLevel, "Server %s-%s register check error: %s", s.opts.Name, s.opts.Id, err)
-			logger.Errorf("Server %s-%s register check error: %s", s.opts.Name, s.opts.Id, err)
-		}
 		return err
 	}
 
@@ -195,6 +200,8 @@ func (s *service) start() error {
 		return err
 	}
 
+	logger := s.opts.Logger
+
 	s.opts.Address = l.Addr().String()
 	srv := s.genSrv()
 	srv.Endpoints = s.srv.Endpoints
@@ -221,9 +228,7 @@ func (s *service) start() error {
 			if s.static {
 				_, err := os.Stat(static)
 				if err == nil {
-					if logger.V(logger.InfoLevel, logger.DefaultLogger) {
+					logger.Logf(log.InfoLevel, "Enabling static file serving from %s", static)
-						logger.Infof("Enabling static file serving from %s", static)
-					}
 					s.mux.Handle("/", http.FileServer(http.Dir(static)))
 				}
 			}
@@ -255,9 +260,7 @@ func (s *service) start() error {
 		ch <- l.Close()
 	}()
 
-	if logger.V(logger.InfoLevel, logger.DefaultLogger) {
+	logger.Logf(log.InfoLevel, "Listening on %v", l.Addr().String())
-		logger.Infof("Listening on %v", l.Addr().String())
-	}
 	return nil
 }
 
@@ -279,9 +282,7 @@ func (s *service) stop() error {
 	s.exit <- ch
 	s.running = false
 
-	if logger.V(logger.InfoLevel, logger.DefaultLogger) {
+	s.opts.Logger.Log(log.InfoLevel, "Stopping")
-		logger.Info("Stopping")
-	}
 
 	for _, fn := range s.opts.AfterStop {
 		if err := fn(); err != nil {
@@ -473,6 +474,7 @@ func (s *service) Run() error {
 		return err
 	}
 
+	logger := s.opts.Logger
 	// start the profiler
 	if s.opts.Service.Options().Profile != nil {
 		// to view mutex contention
@@ -485,7 +487,7 @@ func (s *service) Run() error {
 		}
 		defer func() {
 			if err := s.opts.Service.Options().Profile.Stop(); err != nil {
-				logger.Error(err)
+				logger.Log(log.ErrorLevel, err)
 			}
 		}()
 	}
@@ -505,14 +507,10 @@ func (s *service) Run() error {
 	select {
 	// wait on kill signal
 	case sig := <-ch:
-		if logger.V(logger.InfoLevel, logger.DefaultLogger) {
+		logger.Logf(log.InfoLevel, "Received signal %s", sig)
-			logger.Infof("Received signal %s", sig)
-		}
 	// wait on context cancel
 	case <-s.opts.Context.Done():
-		if logger.V(logger.InfoLevel, logger.DefaultLogger) {
+		logger.Log(log.InfoLevel, "Received context shutdown")
-			logger.Info("Received context shutdown")
-		}
 	}
 
 	// exit reg loop

web/web_test.go

@@ -57,14 +57,14 @@ func testFunc() {
 		defer wg.Done()
 		err := s.Run()
 		if err != nil {
-			logger.Errorf("micro run error: %v", err)
+			logger.Logf(logger.ErrorLevel, "micro run error: %v", err)
 		}
 	}()
 	go func() {
 		defer wg.Done()
 		err := w.Run()
 		if err != nil {
-			logger.Errorf("web run error: %v", err)
+			logger.Logf(logger.ErrorLevel, "web run error: %v", err)
 		}
 	}()