1. use github.com/coreos instead of go.etcd.io in etcd related import path; 2. add dialtimeout to etcd client

config/source/etcd/etcd.go

@@ -6,9 +6,9 @@ import (
 	"net"
 	"time"
 
+	cetcd "github.com/coreos/etcd/clientv3"
+	"github.com/coreos/etcd/mvcc/mvccpb"
 	"github.com/micro/go-micro/config/source"
-	cetcd "go.etcd.io/etcd/clientv3"
-	"go.etcd.io/etcd/mvcc/mvccpb"
 )
 
 // Currently a single etcd reader
@@ -100,8 +100,15 @@ func NewSource(opts ...source.Option) source.Source {
 		endpoints = []string{"localhost:2379"}
 	}
 
+	// check dial timeout option
+	dialTimeout, ok := options.Context.Value(dialTimeoutKey{}).(time.Duration)
+	if !ok {
+		dialTimeout = 3 * time.Second // default dial timeout
+	}
+
 	config := cetcd.Config{
-		Endpoints: endpoints,
+		Endpoints:   endpoints,
+		DialTimeout: dialTimeout,
 	}
 
 	u, ok := options.Context.Value(authKey{}).(*authCreds)

config/source/etcd/options.go

@@ -2,6 +2,7 @@ package etcd
 
 import (
 	"context"
+	"time"
 
 	"github.com/micro/go-micro/config/source"
 )
@@ -10,13 +11,14 @@ type addressKey struct{}
 type prefixKey struct{}
 type stripPrefixKey struct{}
 type authKey struct{}
+type dialTimeoutKey struct{}
 
 type authCreds struct {
 	Username string
 	Password string
 }
 
-// WithAddress sets the consul address
+// WithAddress sets the etcd address
 func WithAddress(a ...string) source.Option {
 	return func(o *source.Options) {
 		if o.Context == nil {
@@ -56,3 +58,13 @@ func Auth(username, password string) source.Option {
 		o.Context = context.WithValue(o.Context, authKey{}, &authCreds{Username: username, Password: password})
 	}
 }
+
+// WithDialTimeout set the time out for dialing to etcd
+func WithDialTimeout(timeout time.Duration) source.Option {
+	return func(o *source.Options) {
+		if o.Context == nil {
+			o.Context = context.Background()
+		}
+		o.Context = context.WithValue(o.Context, dialTimeoutKey{}, timeout)
+	}
+}

config/source/etcd/util.go

@@ -3,9 +3,9 @@ package etcd
 import (
 	"strings"
 
+	"github.com/coreos/etcd/clientv3"
+	"github.com/coreos/etcd/mvcc/mvccpb"
 	"github.com/micro/go-micro/config/encoder"
-	"go.etcd.io/etcd/clientv3"
-	"go.etcd.io/etcd/mvcc/mvccpb"
 )
 
 func makeEvMap(e encoder.Encoder, data map[string]interface{}, kv []*clientv3.Event, stripPrefix string) map[string]interface{} {

config/source/etcd/watcher.go

@@ -6,8 +6,8 @@ import (
 	"sync"
 	"time"
 
+	cetcd "github.com/coreos/etcd/clientv3"
 	"github.com/micro/go-micro/config/source"
-	cetcd "go.etcd.io/etcd/clientv3"
 )
 
 type watcher struct {

go.mod

@@ -7,7 +7,7 @@ require (
 	github.com/beevik/ntp v0.2.0
 	github.com/bitly/go-simplejson v0.5.0
 	github.com/bwmarrin/discordgo v0.19.0
-	github.com/coreos/etcd v3.3.13+incompatible // indirect
+	github.com/coreos/etcd v3.3.13+incompatible
 	github.com/forestgiant/sliceutil v0.0.0-20160425183142-94783f95db6c
 	github.com/fsnotify/fsnotify v1.4.7
 	github.com/fsouza/go-dockerclient v1.4.1