Remove otel instrumentation

internal/pool/conn.go

@@ -9,7 +9,6 @@ import (
 
 	"github.com/go-redis/redis/v8/internal"
 	"github.com/go-redis/redis/v8/internal/proto"
-	"go.opentelemetry.io/otel/trace"
 )
 
 var noDeadline = time.Time{}
@@ -66,41 +65,37 @@ func (cn *Conn) RemoteAddr() net.Addr {
 }
 
 func (cn *Conn) WithReader(ctx context.Context, timeout time.Duration, fn func(rd *proto.Reader) error) error {
-	return internal.WithSpan(ctx, "redis.with_reader", func(ctx context.Context, span trace.Span) error {
-		if err := cn.netConn.SetReadDeadline(cn.deadline(ctx, timeout)); err != nil {
-			return internal.RecordError(ctx, span, err)
-		}
-		if err := fn(cn.rd); err != nil {
-			return internal.RecordError(ctx, span, err)
-		}
-		return nil
-	})
+	if err := cn.netConn.SetReadDeadline(cn.deadline(ctx, timeout)); err != nil {
+		return err
+	}
+	if err := fn(cn.rd); err != nil {
+		return err
+	}
+	return nil
 }
 
 func (cn *Conn) WithWriter(
 	ctx context.Context, timeout time.Duration, fn func(wr *proto.Writer) error,
 ) error {
-	return internal.WithSpan(ctx, "redis.with_writer", func(ctx context.Context, span trace.Span) error {
-		if err := cn.netConn.SetWriteDeadline(cn.deadline(ctx, timeout)); err != nil {
-			return internal.RecordError(ctx, span, err)
-		}
+	if err := cn.netConn.SetWriteDeadline(cn.deadline(ctx, timeout)); err != nil {
+		return err
+	}
 
-		if cn.bw.Buffered() > 0 {
-			cn.bw.Reset(cn.netConn)
-		}
+	if cn.bw.Buffered() > 0 {
+		cn.bw.Reset(cn.netConn)
+	}
 
-		if err := fn(cn.wr); err != nil {
-			return internal.RecordError(ctx, span, err)
-		}
+	if err := fn(cn.wr); err != nil {
+		return err
+	}
 
-		if err := cn.bw.Flush(); err != nil {
-			return internal.RecordError(ctx, span, err)
-		}
+	if err := cn.bw.Flush(); err != nil {
+		return err
+	}
 
-		internal.WritesCounter.Add(ctx, 1)
+	internal.WritesCounter.Add(ctx, 1)
 
-		return nil
-	})
+	return nil
 }
 
 func (cn *Conn) Close() error {

internal/util.go

@@ -4,24 +4,19 @@ import (
 	"context"
 	"time"
 
-	"github.com/go-redis/redis/v8/internal/proto"
 	"github.com/go-redis/redis/v8/internal/util"
-	"go.opentelemetry.io/otel"
-	"go.opentelemetry.io/otel/trace"
 )
 
 func Sleep(ctx context.Context, dur time.Duration) error {
-	return WithSpan(ctx, "time.Sleep", func(ctx context.Context, span trace.Span) error {
-		t := time.NewTimer(dur)
-		defer t.Stop()
+	t := time.NewTimer(dur)
+	defer t.Stop()
 
-		select {
-		case <-t.C:
-			return nil
-		case <-ctx.Done():
-			return ctx.Err()
-		}
-	})
+	select {
+	case <-t.C:
+		return nil
+	case <-ctx.Done():
+		return ctx.Err()
+	}
 }
 
 func ToLower(s string) string {
@@ -49,25 +44,3 @@ func isLower(s string) bool {
 	}
 	return true
 }
-
-//------------------------------------------------------------------------------
-
-var tracer = otel.Tracer("github.com/go-redis/redis")
-
-func WithSpan(ctx context.Context, name string, fn func(context.Context, trace.Span) error) error {
-	if span := trace.SpanFromContext(ctx); !span.IsRecording() {
-		return fn(ctx, span)
-	}
-
-	ctx, span := tracer.Start(ctx, name)
-	defer span.End()
-
-	return fn(ctx, span)
-}
-
-func RecordError(ctx context.Context, span trace.Span, err error) error {
-	if err != proto.Nil {
-		span.RecordError(err)
-	}
-	return err
-}

options.go

@@ -12,10 +12,7 @@ import (
 	"strings"
 	"time"
 
-	"github.com/go-redis/redis/v8/internal"
 	"github.com/go-redis/redis/v8/internal/pool"
-	"go.opentelemetry.io/otel/attribute"
-	"go.opentelemetry.io/otel/trace"
 )
 
 // Limiter is the interface of a rate limiter or a circuit breaker.
@@ -292,20 +289,7 @@ func getUserPassword(u *url.URL) (string, string) {
 func newConnPool(opt *Options) *pool.ConnPool {
 	return pool.NewConnPool(&pool.Options{
 		Dialer: func(ctx context.Context) (net.Conn, error) {
-			var conn net.Conn
-			err := internal.WithSpan(ctx, "redis.dial", func(ctx context.Context, span trace.Span) error {
-				span.SetAttributes(
-					attribute.String("db.connection_string", opt.Addr),
-				)
-
-				var err error
-				conn, err = opt.Dialer(ctx, opt.Network, opt.Addr)
-				if err != nil {
-					_ = internal.RecordError(ctx, span, err)
-				}
-				return err
-			})
-			return conn, err
+			return opt.Dialer(ctx, opt.Network, opt.Addr)
 		},
 		PoolSize:           opt.PoolSize,
 		MinIdleConns:       opt.MinIdleConns,

redis.go

@@ -10,8 +10,6 @@ import (
 	"github.com/go-redis/redis/v8/internal"
 	"github.com/go-redis/redis/v8/internal/pool"
 	"github.com/go-redis/redis/v8/internal/proto"
-	"go.opentelemetry.io/otel/attribute"
-	"go.opentelemetry.io/otel/trace"
 )
 
 // Nil reply returned by Redis when key does not exist.
@@ -214,9 +212,7 @@ func (c *baseClient) _getConn(ctx context.Context) (*pool.Conn, error) {
 		return cn, nil
 	}
 
-	err = internal.WithSpan(ctx, "redis.init_conn", func(ctx context.Context, span trace.Span) error {
-		return c.initConn(ctx, cn)
-	})
+	err = c.initConn(ctx, cn)
 	if err != nil {
 		c.connPool.Remove(ctx, cn, err)
 		if err := errors.Unwrap(err); err != nil {
@@ -288,43 +284,35 @@ func (c *baseClient) releaseConn(ctx context.Context, cn *pool.Conn, err error)
 func (c *baseClient) withConn(
 	ctx context.Context, fn func(context.Context, *pool.Conn) error,
 ) error {
-	return internal.WithSpan(ctx, "redis.with_conn", func(ctx context.Context, span trace.Span) error {
-		cn, err := c.getConn(ctx)
-		if err != nil {
-			return err
-		}
+	cn, err := c.getConn(ctx)
+	if err != nil {
+		return err
+	}
 
-		if span.IsRecording() {
-			if remoteAddr := cn.RemoteAddr(); remoteAddr != nil {
-				span.SetAttributes(attribute.String("net.peer.ip", remoteAddr.String()))
-			}
-		}
+	defer func() {
+		c.releaseConn(ctx, cn, err)
+	}()
 
-		defer func() {
-			c.releaseConn(ctx, cn, err)
-		}()
+	done := ctx.Done()
+	if done == nil {
+		err = fn(ctx, cn)
+		return err
+	}
 
-		done := ctx.Done()
-		if done == nil {
-			err = fn(ctx, cn)
-			return err
-		}
+	errc := make(chan error, 1)
+	go func() { errc <- fn(ctx, cn) }()
 
-		errc := make(chan error, 1)
-		go func() { errc <- fn(ctx, cn) }()
+	select {
+	case <-done:
+		_ = cn.Close()
+		// Wait for the goroutine to finish and send something.
+		<-errc
 
-		select {
-		case <-done:
-			_ = cn.Close()
-			// Wait for the goroutine to finish and send something.
-			<-errc
-
-			err = ctx.Err()
-			return err
-		case err = <-errc:
-			return err
-		}
-	})
+		err = ctx.Err()
+		return err
+	case err = <-errc:
+		return err
+	}
 }
 
 func (c *baseClient) process(ctx context.Context, cmd Cmder) error {
@@ -333,7 +321,7 @@ func (c *baseClient) process(ctx context.Context, cmd Cmder) error {
 		attempt := attempt
 
 		var retry bool
-		err := internal.WithSpan(ctx, "redis.process", func(ctx context.Context, span trace.Span) error {
+		err := func() error {
 			if attempt > 0 {
 				if err := internal.Sleep(ctx, c.retryBackoff(attempt)); err != nil {
 					return err
@@ -364,7 +352,7 @@ func (c *baseClient) process(ctx context.Context, cmd Cmder) error {
 			}
 			retry = shouldRetry(err, atomic.LoadUint32(&retryTimeout) == 1)
 			return err
-		})
+		}()
 		if err == nil || !retry {
 			return err
 		}