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

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)
+	}
+}