chore: refactor everything so slog.Logger can satisfy LoggerWithLevel interface

internal/log.go

@@ -77,66 +77,3 @@ func (l LogLevelT) InfoOrAbove() bool {
 func (l LogLevelT) DebugOrAbove() bool {
 	return l >= LogLevelDebug
 }
-
-// LoggerWithLevel is a logger interface with leveled logging methods.
-//
-// This interface can be implemented by custom loggers to provide leveled logging.
-type LoggerWithLevel interface {
-	// Infof logs an info level message
-	Infof(ctx context.Context, format string, v ...interface{})
-
-	// Warnf logs a warning level message
-	Warnf(ctx context.Context, format string, v ...interface{})
-
-	// Debugf logs a debug level message
-	Debugf(ctx context.Context, format string, v ...interface{})
-
-	// Errorf logs an error level message
-	Errorf(ctx context.Context, format string, v ...interface{})
-
-	// Enabled reports whether the given log level is enabled in the logger
-	Enabled(ctx context.Context, level LogLevelT) bool
-}
-
-// legacyLoggerAdapter is a logger that implements LoggerWithLevel interface
-// using the global [Logger] and [LogLevel] variables.
-type legacyLoggerAdapter struct{}
-
-func (l *legacyLoggerAdapter) Infof(ctx context.Context, format string, v ...interface{}) {
-	if LogLevel.InfoOrAbove() {
-		Logger.Printf(ctx, format, v...)
-	}
-}
-
-func (l *legacyLoggerAdapter) Warnf(ctx context.Context, format string, v ...interface{}) {
-	if LogLevel.WarnOrAbove() {
-		Logger.Printf(ctx, format, v...)
-	}
-}
-
-func (l *legacyLoggerAdapter) Debugf(ctx context.Context, format string, v ...interface{}) {
-	if LogLevel.DebugOrAbove() {
-		Logger.Printf(ctx, format, v...)
-	}
-}
-
-func (l legacyLoggerAdapter) Errorf(ctx context.Context, format string, v ...interface{}) {
-	Logger.Printf(ctx, format, v...)
-}
-
-func (l legacyLoggerAdapter) Enabled(_ context.Context, level LogLevelT) bool {
-	switch level {
-	case LogLevelWarn:
-		return LogLevel.WarnOrAbove()
-	case LogLevelInfo:
-		return LogLevel.InfoOrAbove()
-	case LogLevelDebug:
-		return LogLevel.DebugOrAbove()
-	case LogLevelError:
-		fallthrough
-	default:
-		return true
-	}
-}
-
-var LegacyLoggerWithLevel LoggerWithLevel = &legacyLoggerAdapter{}

internal/pool/pool.go

@@ -11,6 +11,7 @@ import (
 	"github.com/redis/go-redis/v9/internal"
 	"github.com/redis/go-redis/v9/internal/proto"
 	"github.com/redis/go-redis/v9/internal/util"
+	"github.com/redis/go-redis/v9/logging"
 )
 
 var (
@@ -121,7 +122,7 @@ type Options struct {
 	DialerRetryTimeout time.Duration
 
 	// Optional logger for connection pool operations.
-	Logger internal.LoggerWithLevel
+	Logger *logging.CustomLogger
 }
 
 type lastDialErrorWrap struct {
@@ -1055,10 +1056,10 @@ func (p *ConnPool) isHealthyConn(cn *Conn, nowNs int64) bool {
 	return true
 }
 
-func (p *ConnPool) logger() internal.LoggerWithLevel {
-	if p.cfg.Logger != nil {
-		return p.cfg.Logger
+func (p *ConnPool) logger() *logging.CustomLogger {
+	var logger *logging.CustomLogger
+	if p.cfg != nil && p.cfg.Logger != nil {
+		logger = p.cfg.Logger
 	}
-
-	return internal.LegacyLoggerWithLevel
+	return logger
 }

logging/custom.go

@@ -0,0 +1,144 @@
+package logging
+
+import (
+	"context"
+	"fmt"
+)
+
+// CustomLogger is a logger interface with leveled logging methods.
+//
+// This interface can be implemented by custom loggers to provide leveled logging.
+type CustomLogger struct {
+	logger        LoggerWithLevel
+	loggerLevel   *LogLevelT
+	printfAdapter PrintfAdapter
+}
+
+func NewCustomLogger(logger LoggerWithLevel, opts ...CustomLoggerOption) *CustomLogger {
+	cl := &CustomLogger{
+		logger: logger,
+	}
+	for _, opt := range opts {
+		opt(cl)
+	}
+	return cl
+}
+
+type CustomLoggerOption func(*CustomLogger)
+
+func WithPrintfAdapter(adapter PrintfAdapter) CustomLoggerOption {
+	return func(cl *CustomLogger) {
+		cl.printfAdapter = adapter
+	}
+}
+
+func WithLoggerLevel(level LogLevelT) CustomLoggerOption {
+	return func(cl *CustomLogger) {
+		cl.loggerLevel = &level
+	}
+}
+
+// PrintfAdapter is a function that converts Printf-style log messages into structured log messages.
+// It can be used to extract key-value pairs from the formatted message.
+type PrintfAdapter func(ctx context.Context, format string, v ...any) (context.Context, string, []any)
+
+// Error is a structured error level logging method with context and arguments.
+func (cl *CustomLogger) Error(ctx context.Context, msg string, args ...any) {
+	if cl == nil || cl.logger == nil {
+		legacyLoggerWithLevel.Errorf(ctx, msg, args...)
+		return
+	}
+	cl.logger.ErrorContext(ctx, msg, args...)
+}
+
+func (cl *CustomLogger) Errorf(ctx context.Context, format string, v ...any) {
+	if cl == nil || cl.logger == nil {
+		legacyLoggerWithLevel.Errorf(ctx, format, v...)
+		return
+	}
+	cl.logger.ErrorContext(ctx, format, v...)
+}
+
+// Warn is a structured warning level logging method with context and arguments.
+func (cl *CustomLogger) Warn(ctx context.Context, msg string, args ...any) {
+	if cl == nil || cl.logger == nil {
+		legacyLoggerWithLevel.Warnf(ctx, msg, args...)
+		return
+	}
+	cl.logger.WarnContext(ctx, msg, args...)
+}
+
+func (cl *CustomLogger) Warnf(ctx context.Context, format string, v ...any) {
+	if cl == nil || cl.logger == nil {
+		legacyLoggerWithLevel.Warnf(ctx, format, v...)
+		return
+	}
+	cl.logger.WarnContext(cl.printfToStructured(ctx, format, v...))
+}
+
+// Info is a structured info level logging method with context and arguments.
+func (cl *CustomLogger) Info(ctx context.Context, msg string, args ...any) {
+	if cl == nil || cl.logger == nil {
+		legacyLoggerWithLevel.Infof(ctx, msg, args...)
+		return
+	}
+	cl.logger.InfoContext(ctx, msg, args...)
+}
+
+// Debug is a structured debug level logging method with context and arguments.
+func (cl *CustomLogger) Debug(ctx context.Context, msg string, args ...any) {
+	if cl == nil || cl.logger == nil {
+		legacyLoggerWithLevel.Debugf(ctx, msg, args...)
+		return
+	}
+	cl.logger.DebugContext(ctx, msg, args...)
+}
+
+func (cl *CustomLogger) Infof(ctx context.Context, format string, v ...any) {
+	if cl == nil || cl.logger == nil {
+		legacyLoggerWithLevel.Infof(ctx, format, v...)
+		return
+	}
+
+	cl.logger.InfoContext(cl.printfToStructured(ctx, format, v...))
+}
+
+func (cl *CustomLogger) Debugf(ctx context.Context, format string, v ...any) {
+	if cl == nil || cl.logger == nil {
+		legacyLoggerWithLevel.Debugf(ctx, format, v...)
+		return
+	}
+	cl.logger.DebugContext(cl.printfToStructured(ctx, format, v...))
+}
+
+func (cl *CustomLogger) printfToStructured(ctx context.Context, format string, v ...any) (context.Context, string, []any) {
+	if cl != nil && cl.printfAdapter != nil {
+		return cl.printfAdapter(ctx, format, v...)
+	}
+	return ctx, fmt.Sprintf(format, v...), nil
+}
+
+func (cl *CustomLogger) Enabled(ctx context.Context, level LogLevelT) bool {
+	if cl != nil && cl.loggerLevel != nil {
+		return level >= *cl.loggerLevel
+	}
+
+	return legacyLoggerWithLevel.Enabled(ctx, level)
+}
+
+// LoggerWithLevel is a logger interface with leveled logging methods.
+//
+// [slog.Logger] from the standard library satisfies this interface.
+type LoggerWithLevel interface {
+	// InfoContext logs an info level message
+	InfoContext(ctx context.Context, format string, v ...any)
+
+	// WarnContext logs a warning level message
+	WarnContext(ctx context.Context, format string, v ...any)
+
+	// Debugf logs a debug level message
+	DebugContext(ctx context.Context, format string, v ...any)
+
+	// Errorf logs an error level message
+	ErrorContext(ctx context.Context, format string, v ...any)
+}

logging/legacy.go

@@ -0,0 +1,91 @@
+package logging
+
+import (
+	"context"
+
+	"github.com/redis/go-redis/v9/internal"
+)
+
+// legacyLoggerAdapter is a logger that implements [LoggerWithLevel] interface
+// using the global [internal.Logger] and [internal.LogLevel] variables.
+type legacyLoggerAdapter struct{}
+
+var _ LoggerWithLevel = (*legacyLoggerAdapter)(nil)
+
+// structuredToPrintf converts a structured log message and key-value pairs into something a Printf-style logger can understand.
+func (l *legacyLoggerAdapter) structuredToPrintf(msg string, v ...any) (string, []any) {
+	format := msg
+	var args []any
+
+	for i := 0; i < len(v); i += 2 {
+		if i+1 >= len(v) {
+			break
+		}
+		format += " %v=%v"
+		args = append(args, v[i], v[i+1])
+	}
+
+	return format, args
+}
+
+func (l legacyLoggerAdapter) Errorf(ctx context.Context, format string, v ...any) {
+	internal.Logger.Printf(ctx, format, v...)
+}
+
+func (l *legacyLoggerAdapter) ErrorContext(ctx context.Context, msg string, args ...any) {
+	format, v := l.structuredToPrintf(msg, args...)
+	l.Errorf(ctx, format, v...)
+}
+
+func (l *legacyLoggerAdapter) WarnContext(ctx context.Context, msg string, args ...any) {
+	format, v := l.structuredToPrintf(msg, args...)
+	l.Warnf(ctx, format, v...)
+}
+
+func (l *legacyLoggerAdapter) Warnf(ctx context.Context, format string, v ...any) {
+	if !internal.LogLevel.WarnOrAbove() {
+		// Skip logging
+		return
+	}
+	internal.Logger.Printf(ctx, format, v...)
+}
+
+func (l *legacyLoggerAdapter) InfoContext(ctx context.Context, msg string, args ...any) {
+	format, v := l.structuredToPrintf(msg, args...)
+	l.Infof(ctx, format, v...)
+}
+
+func (l *legacyLoggerAdapter) Infof(ctx context.Context, format string, v ...any) {
+	if !internal.LogLevel.InfoOrAbove() {
+		// Skip logging
+		return
+	}
+	internal.Logger.Printf(ctx, format, v...)
+}
+
+func (l *legacyLoggerAdapter) DebugContext(ctx context.Context, msg string, args ...any) {
+	format, v := l.structuredToPrintf(msg, args...)
+	l.Debugf(ctx, format, v...)
+}
+
+func (l *legacyLoggerAdapter) Debugf(ctx context.Context, format string, v ...any) {
+	if !internal.LogLevel.DebugOrAbove() {
+		// Skip logging
+		return
+	}
+	internal.Logger.Printf(ctx, format, v...)
+}
+
+func (l *legacyLoggerAdapter) Enabled(ctx context.Context, level LogLevelT) bool {
+	switch level {
+	case LogLevelDebug:
+		return internal.LogLevel.DebugOrAbove()
+	case LogLevelWarn:
+		return internal.LogLevel.WarnOrAbove()
+	case LogLevelInfo:
+		return internal.LogLevel.InfoOrAbove()
+	}
+	return true
+}
+
+var legacyLoggerWithLevel = &legacyLoggerAdapter{}

maintnotifications/circuit_breaker.go

@@ -6,8 +6,8 @@ import (
 	"sync/atomic"
 	"time"
 
-	"github.com/redis/go-redis/v9/internal"
 	"github.com/redis/go-redis/v9/internal/maintnotifications/logs"
+	"github.com/redis/go-redis/v9/logging"
 )
 
 // CircuitBreakerState represents the state of a circuit breaker
@@ -194,11 +194,12 @@ func (cb *CircuitBreaker) GetStats() CircuitBreakerStats {
 	}
 }
 
-func (cb *CircuitBreaker) logger() internal.LoggerWithLevel {
+func (cb *CircuitBreaker) logger() *logging.CustomLogger {
+	var logger *logging.CustomLogger
 	if cb.config != nil && cb.config.Logger != nil {
-		return cb.config.Logger
+		logger = cb.config.Logger
 	}
-	return internal.LegacyLoggerWithLevel
+	return logger
 }
 
 // CircuitBreakerStats provides statistics about a circuit breaker
@@ -351,9 +352,10 @@ func (cbm *CircuitBreakerManager) Reset() {
 	})
 }
 
-func (cbm *CircuitBreakerManager) logger() internal.LoggerWithLevel {
+func (cbm *CircuitBreakerManager) logger() *logging.CustomLogger {
+	var logger *logging.CustomLogger
 	if cbm.config != nil && cbm.config.Logger != nil {
-		return cbm.config.Logger
+		logger = cbm.config.Logger
 	}
-	return internal.LegacyLoggerWithLevel
+	return logger
 }

maintnotifications/config.go

@@ -7,9 +7,9 @@ import (
 	"strings"
 	"time"
 
-	"github.com/redis/go-redis/v9/internal"
 	"github.com/redis/go-redis/v9/internal/maintnotifications/logs"
 	"github.com/redis/go-redis/v9/internal/util"
+	"github.com/redis/go-redis/v9/logging"
 )
 
 // Mode represents the maintenance notifications mode
@@ -130,7 +130,7 @@ type Config struct {
 	MaxHandoffRetries int
 
 	// Logger is an optional custom logger for maintenance notifications.
-	Logger internal.LoggerWithLevel
+	Logger *logging.CustomLogger
 }
 
 func (c *Config) IsEnabled() bool {
@@ -369,11 +369,12 @@ func (c *Config) applyWorkerDefaults(poolSize int) {
 	}
 }
 
-func (c *Config) logger() internal.LoggerWithLevel {
+func (c *Config) logger() *logging.CustomLogger {
+	var logger *logging.CustomLogger
 	if c.Logger != nil {
-		return c.Logger
+		logger = c.Logger
 	}
-	return internal.LegacyLoggerWithLevel
+	return logger
 }
 
 // DetectEndpointType automatically detects the appropriate endpoint type

maintnotifications/handoff_worker.go

@@ -11,6 +11,7 @@ import (
 	"github.com/redis/go-redis/v9/internal"
 	"github.com/redis/go-redis/v9/internal/maintnotifications/logs"
 	"github.com/redis/go-redis/v9/internal/pool"
+	"github.com/redis/go-redis/v9/logging"
 )
 
 // handoffWorkerManager manages background workers and queue for connection handoffs
@@ -492,9 +493,10 @@ func (hwm *handoffWorkerManager) closeConnFromRequest(ctx context.Context, reque
 	}
 }
 
-func (hwm *handoffWorkerManager) logger() internal.LoggerWithLevel {
+func (hwm *handoffWorkerManager) logger() *logging.CustomLogger {
+	var logger *logging.CustomLogger
 	if hwm.config != nil && hwm.config.Logger != nil {
-		return hwm.config.Logger
+		logger = hwm.config.Logger
 	}
-	return internal.LegacyLoggerWithLevel
+	return logger
 }

maintnotifications/manager.go

@@ -9,10 +9,10 @@ import (
 	"sync/atomic"
 	"time"
 
-	"github.com/redis/go-redis/v9/internal"
 	"github.com/redis/go-redis/v9/internal/interfaces"
 	"github.com/redis/go-redis/v9/internal/maintnotifications/logs"
 	"github.com/redis/go-redis/v9/internal/pool"
+	"github.com/redis/go-redis/v9/logging"
 	"github.com/redis/go-redis/v9/push"
 )
 
@@ -311,9 +311,10 @@ func (hm *Manager) AddNotificationHook(notificationHook NotificationHook) {
 	hm.hooks = append(hm.hooks, notificationHook)
 }
 
-func (hm *Manager) logger() internal.LoggerWithLevel {
+func (hm *Manager) logger() *logging.CustomLogger {
+	var logger *logging.CustomLogger
 	if hm.config != nil && hm.config.Logger != nil {
-		return hm.config.Logger
+		logger = hm.config.Logger
 	}
-	return internal.LegacyLoggerWithLevel
+	return logger
 }

maintnotifications/pool_hook.go

@@ -6,9 +6,9 @@ import (
 	"sync"
 	"time"
 
-	"github.com/redis/go-redis/v9/internal"
 	"github.com/redis/go-redis/v9/internal/maintnotifications/logs"
 	"github.com/redis/go-redis/v9/internal/pool"
+	"github.com/redis/go-redis/v9/logging"
 )
 
 // OperationsManagerInterface defines the interface for completing handoff operations
@@ -181,9 +181,10 @@ func (ph *PoolHook) Shutdown(ctx context.Context) error {
 	return ph.workerManager.shutdownWorkers(ctx)
 }
 
-func (ph *PoolHook) logger() internal.LoggerWithLevel {
-	if ph.config.Logger != nil {
-		return ph.config.Logger
+func (ph *PoolHook) logger() *logging.CustomLogger {
+	var logger *logging.CustomLogger
+	if ph.config != nil && ph.config.Logger != nil {
+		logger = ph.config.Logger
 	}
-	return internal.LegacyLoggerWithLevel
-}
+	return logger
+}

maintnotifications/push_notification_handler.go

@@ -9,6 +9,7 @@ import (
 	"github.com/redis/go-redis/v9/internal"
 	"github.com/redis/go-redis/v9/internal/maintnotifications/logs"
 	"github.com/redis/go-redis/v9/internal/pool"
+	"github.com/redis/go-redis/v9/logging"
 	"github.com/redis/go-redis/v9/push"
 )
 
@@ -273,9 +274,10 @@ func (snh *NotificationHandler) handleFailedOver(ctx context.Context, handlerCtx
 	return nil
 }
 
-func (snh *NotificationHandler) logger() internal.LoggerWithLevel {
+func (snh *NotificationHandler) logger() *logging.CustomLogger {
+	var logger *logging.CustomLogger
 	if snh.manager != nil && snh.manager.config != nil && snh.manager.config.Logger != nil {
-		return snh.manager.config.Logger
+		logger = snh.manager.config.Logger
 	}
-	return internal.LegacyLoggerWithLevel
+	return logger
 }

options.go

@@ -14,10 +14,10 @@ import (
 	"time"
 
 	"github.com/redis/go-redis/v9/auth"
-	"github.com/redis/go-redis/v9/internal"
 	"github.com/redis/go-redis/v9/internal/pool"
 	"github.com/redis/go-redis/v9/internal/proto"
 	"github.com/redis/go-redis/v9/internal/util"
+	"github.com/redis/go-redis/v9/logging"
 	"github.com/redis/go-redis/v9/maintnotifications"
 	"github.com/redis/go-redis/v9/push"
 )
@@ -271,7 +271,7 @@ type Options struct {
 
 	// Logger is the logger used by the client for logging.
 	// If none is provided, the global logger [internal.LegacyLoggerWithLevel] is used.
-	Logger internal.LoggerWithLevel
+	Logger *logging.CustomLogger
 }
 
 func (opt *Options) init() {

osscluster.go

@@ -20,6 +20,7 @@ import (
 	"github.com/redis/go-redis/v9/internal/pool"
 	"github.com/redis/go-redis/v9/internal/proto"
 	"github.com/redis/go-redis/v9/internal/rand"
+	"github.com/redis/go-redis/v9/logging"
 	"github.com/redis/go-redis/v9/maintnotifications"
 	"github.com/redis/go-redis/v9/push"
 )
@@ -150,7 +151,7 @@ type ClusterOptions struct {
 	MaintNotificationsConfig *maintnotifications.Config
 
 	// Logger is an optional logger for logging cluster-related messages.
-	Logger internal.LoggerWithLevel
+	Logger *logging.CustomLogger
 }
 
 func (opt *ClusterOptions) init() {
@@ -708,12 +709,12 @@ func (c *clusterNodes) Random() (*clusterNode, error) {
 	return c.GetOrCreate(addrs[n])
 }
 
-func (c *clusterNodes) logger() internal.LoggerWithLevel {
-	if c.opt.Logger != nil {
-		return c.opt.Logger
-	} else {
-		return internal.LegacyLoggerWithLevel
+func (c *clusterNodes) logger() *logging.CustomLogger {
+	var logger *logging.CustomLogger
+	if c.opt != nil && c.opt.Logger != nil {
+		logger = c.opt.Logger
 	}
+	return logger
 }
 
 //------------------------------------------------------------------------------
@@ -2139,12 +2140,12 @@ func (c *ClusterClient) context(ctx context.Context) context.Context {
 	return context.Background()
 }
 
-func (c *ClusterClient) logger() internal.LoggerWithLevel {
-	if c.opt.Logger != nil {
-		return c.opt.Logger
-	} else {
-		return internal.LegacyLoggerWithLevel
+func (c *ClusterClient) logger() *logging.CustomLogger {
+	var logger *logging.CustomLogger
+	if c.opt != nil && c.opt.Logger != nil {
+		logger = c.opt.Logger
 	}
+	return logger
 }
 
 func appendIfNotExist[T comparable](vals []T, newVal T) []T {

pubsub.go

@@ -10,6 +10,7 @@ import (
 	"github.com/redis/go-redis/v9/internal"
 	"github.com/redis/go-redis/v9/internal/pool"
 	"github.com/redis/go-redis/v9/internal/proto"
+	"github.com/redis/go-redis/v9/logging"
 	"github.com/redis/go-redis/v9/push"
 )
 
@@ -144,12 +145,12 @@ func mapKeys(m map[string]struct{}) []string {
 // logger is a wrapper around the logger to log messages with context.
 //
 // it uses the client logger if set, otherwise it uses the global logger.
-func (c *PubSub) logger() internal.LoggerWithLevel {
-	if c.opt.Logger != nil {
-		return c.opt.Logger
-	} else {
-		return internal.LegacyLoggerWithLevel
+func (c *PubSub) logger() *logging.CustomLogger {
+	var logger *logging.CustomLogger
+	if c.opt != nil && c.opt.Logger != nil {
+		logger = c.opt.Logger
 	}
+	return logger
 }
 
 func (c *PubSub) _subscribe(
@@ -646,7 +647,7 @@ type channel struct {
 	pubSub *PubSub
 
 	// Optional logger for logging channel-related messages.
-	Logger internal.LoggerWithLevel
+	Logger *logging.CustomLogger
 
 	msgCh chan *Message
 	allCh chan interface{}
@@ -809,10 +810,10 @@ func (c *channel) initAllChan() {
 	}()
 }
 
-func (c *channel) logger() internal.LoggerWithLevel {
+func (c *channel) logger() *logging.CustomLogger {
+	var logger *logging.CustomLogger
 	if c.Logger != nil {
-		return c.Logger
-	} else {
-		return internal.LegacyLoggerWithLevel
+		logger = c.Logger
 	}
+	return logger
 }

redis.go

@@ -15,6 +15,7 @@ import (
 	"github.com/redis/go-redis/v9/internal/hscan"
 	"github.com/redis/go-redis/v9/internal/pool"
 	"github.com/redis/go-redis/v9/internal/proto"
+	"github.com/redis/go-redis/v9/logging"
 	"github.com/redis/go-redis/v9/maintnotifications"
 	"github.com/redis/go-redis/v9/push"
 )
@@ -230,7 +231,7 @@ type baseClient struct {
 	streamingCredentialsManager *streaming.Manager
 
 	// loggerWithLevel is used for logging
-	loggerWithLevel internal.LoggerWithLevel
+	loggerWithLevel *logging.CustomLogger
 }
 
 func (c *baseClient) clone() *baseClient {
@@ -754,12 +755,12 @@ func (c *baseClient) context(ctx context.Context) context.Context {
 
 // logger is a wrapper around the logger to log messages with context.
 // it uses the client logger if set, otherwise it uses the global logger.
-func (c *baseClient) logger() internal.LoggerWithLevel {
-	if c.opt.Logger != nil {
-		return c.opt.Logger
-	} else {
-		return internal.LegacyLoggerWithLevel
+func (c *baseClient) logger() *logging.CustomLogger {
+	var logger *logging.CustomLogger
+	if c.opt != nil && c.opt.Logger != nil {
+		logger = c.opt.Logger
 	}
+	return logger
 }
 
 // createInitConnFunc creates a connection initialization function that can be used for reconnections.

ring.go

@@ -20,6 +20,7 @@ import (
 	"github.com/redis/go-redis/v9/internal/pool"
 	"github.com/redis/go-redis/v9/internal/proto"
 	"github.com/redis/go-redis/v9/internal/rand"
+	"github.com/redis/go-redis/v9/logging"
 )
 
 var errRingShardsDown = errors.New("redis: all ring shards are down")
@@ -155,7 +156,7 @@ type RingOptions struct {
 	IdentitySuffix  string
 	UnstableResp3   bool
 
-	Logger internal.LoggerWithLevel
+	Logger *logging.CustomLogger
 }
 
 func (opt *RingOptions) init() {
@@ -561,11 +562,12 @@ func (c *ringSharding) Close() error {
 	return firstErr
 }
 
-func (c *ringSharding) logger() internal.LoggerWithLevel {
-	if c.opt.Logger != nil {
-		return c.opt.Logger
+func (c *ringSharding) logger() *logging.CustomLogger {
+	var logger *logging.CustomLogger
+	if c.opt != nil && c.opt.Logger != nil {
+		logger = c.opt.Logger
 	}
-	return internal.LegacyLoggerWithLevel
+	return logger
 }
 
 //------------------------------------------------------------------------------

sentinel.go

@@ -13,10 +13,10 @@ import (
 	"time"
 
 	"github.com/redis/go-redis/v9/auth"
-	"github.com/redis/go-redis/v9/internal"
 	"github.com/redis/go-redis/v9/internal/pool"
 	"github.com/redis/go-redis/v9/internal/rand"
 	"github.com/redis/go-redis/v9/internal/util"
+	"github.com/redis/go-redis/v9/logging"
 	"github.com/redis/go-redis/v9/maintnotifications"
 	"github.com/redis/go-redis/v9/push"
 )
@@ -151,7 +151,7 @@ type FailoverOptions struct {
 	//MaintNotificationsConfig *maintnotifications.Config
 
 	// Optional logger for logging
-	Logger internal.LoggerWithLevel
+	Logger *logging.CustomLogger
 }
 
 func (opt *FailoverOptions) clientOptions() *Options {
@@ -1132,11 +1132,12 @@ func (c *sentinelFailover) listen(pubsub *PubSub) {
 	}
 }
 
-func (c *sentinelFailover) logger() internal.LoggerWithLevel {
-	if c.opt.Logger != nil {
-		return c.opt.Logger
+func (c *sentinelFailover) logger() *logging.CustomLogger {
+	var logger *logging.CustomLogger
+	if c.opt != nil && c.opt.Logger != nil {
+		logger = c.opt.Logger
 	}
-	return internal.LegacyLoggerWithLevel
+	return logger
 }
 
 func contains(slice []string, str string) bool {