etcdctlv3: add dial timeout flag

Fix https://github.com/coreos/etcd/issues/4836.

e2e/etcd_test.go

@@ -183,6 +183,7 @@ type etcdProcessClusterConfig struct {
 	isPeerTLS     bool
 	isPeerAutoTLS bool
 	initialToken  string
+	isV3          bool
 }
 
 // newEtcdProcessCluster launches a new cluster from etcd processes, returning
@@ -283,6 +284,9 @@ func (cfg *etcdProcessClusterConfig) etcdProcessConfigs() []*etcdProcessConfig {
 			"--initial-cluster-token", cfg.initialToken,
 			"--data-dir", dataDirPath,
 		}
+		if cfg.isV3 {
+			args = append(args, "--experimental-v3demo")
+		}
 
 		args = append(args, cfg.tlsArgs()...)
 

e2e/etcdctlv3_test.go

@@ -0,0 +1,154 @@
+// Copyright 2016 CoreOS, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package e2e
+
+import (
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/coreos/etcd/pkg/fileutil"
+	"github.com/coreos/etcd/pkg/testutil"
+)
+
+func TestCtlV3SetQuorum(t *testing.T) {
+	testCtlV3Set(t, &configNoTLS, 3*time.Second, true)
+}
+
+func TestCtlV3SetQuorumZeroTimeout(t *testing.T) {
+	testCtlV3Set(t, &configNoTLS, 0, true)
+}
+
+func TestCtlV3SetQuorumTimeout(t *testing.T) {
+	testCtlV3Set(t, &configNoTLS, time.Nanosecond, true)
+}
+
+func TestCtlV3SetPeerTLSQuorum(t *testing.T) {
+	testCtlV3Set(t, &configPeerTLS, 3*time.Second, true)
+}
+
+func testCtlV3Set(t *testing.T, cfg *etcdProcessClusterConfig, dialTimeout time.Duration, quorum bool) {
+	defer testutil.AfterTest(t)
+
+	epc := setupCtlV3Test(t, cfg, quorum)
+	defer func() {
+		if errC := epc.Close(); errC != nil {
+			t.Fatalf("error closing etcd processes (%v)", errC)
+		}
+	}()
+
+	key, value := "foo", "bar"
+
+	donec := make(chan struct{})
+	go func() {
+		if err := ctlV3Put(epc, key, value, dialTimeout); err != nil {
+			if dialTimeout > 0 && dialTimeout <= time.Nanosecond && isGRPCTimedout(err) { // timeout expected
+				donec <- struct{}{}
+				return
+			}
+			t.Fatalf("put error (%v)", err)
+		}
+		if err := ctlV3Get(epc, key, value, dialTimeout, quorum); err != nil {
+			if dialTimeout > 0 && dialTimeout <= time.Nanosecond && isGRPCTimedout(err) { // timeout expected
+				donec <- struct{}{}
+				return
+			}
+			t.Fatalf("get error (%v)", err)
+		}
+		donec <- struct{}{}
+	}()
+
+	select {
+	case <-time.After(2*dialTimeout + time.Second):
+		if dialTimeout > 0 {
+			t.Fatalf("test timed out for %v", dialTimeout)
+		}
+	case <-donec:
+	}
+}
+
+func ctlV3PrefixArgs(clus *etcdProcessCluster, dialTimeout time.Duration) []string {
+	if len(clus.proxies()) > 0 { // TODO: add proxy check as in v2
+		panic("v3 proxy not implemented")
+	}
+
+	endpoints := ""
+	if backends := clus.backends(); len(backends) != 0 {
+		es := []string{}
+		for _, b := range backends {
+			es = append(es, stripSchema(b.cfg.acurl.String()))
+		}
+		endpoints = strings.Join(es, ",")
+	}
+	cmdArgs := []string{"../bin/etcdctlv3", "--endpoints", endpoints, "--dial-timeout", dialTimeout.String()}
+	if clus.cfg.isClientTLS {
+		cmdArgs = append(cmdArgs, "--cacert", caPath, "--cert", certPath, "--key", privateKeyPath)
+	}
+	return cmdArgs
+}
+
+func ctlV3Put(clus *etcdProcessCluster, key, value string, dialTimeout time.Duration) error {
+	cmdArgs := append(ctlV3PrefixArgs(clus, dialTimeout), "put", key, value)
+	return spawnWithExpectedString(cmdArgs, "OK")
+}
+
+func ctlV3Get(clus *etcdProcessCluster, key, value string, dialTimeout time.Duration, quorum bool) error {
+	if !quorum { // TODO: add serialized option
+		panic("serialized option is not implemented")
+	}
+
+	cmdArgs := append(ctlV3PrefixArgs(clus, dialTimeout), "get", key)
+
+	// TODO: match by value. Currently it prints out both key and value in multi-lines.
+	return spawnWithExpectedString(cmdArgs, key)
+}
+
+func mustCtlV3(t *testing.T) {
+	if !fileutil.Exist("../bin/etcdctlv3") {
+		t.Fatalf("could not find etcdctlv3 binary")
+	}
+}
+
+func setupCtlV3Test(t *testing.T, cfg *etcdProcessClusterConfig, quorum bool) *etcdProcessCluster {
+	if !quorum { // TODO: add serialized option
+		panic("serialized option is not implemented")
+	}
+
+	mustCtlV3(t)
+	if !quorum {
+		cfg = configStandalone(*cfg)
+	}
+	copied := *cfg
+	copied.isV3 = true
+	epc, err := newEtcdProcessCluster(&copied)
+	if err != nil {
+		t.Fatalf("could not start etcd process cluster (%v)", err)
+	}
+	return epc
+}
+
+func isGRPCTimedout(err error) bool {
+	return strings.Contains(err.Error(), "grpc: timed out trying to connect")
+}
+
+func stripSchema(s string) string {
+	if strings.HasPrefix(s, "http://") {
+		s = strings.Replace(s, "http://", "", -1)
+	}
+	if strings.HasPrefix(s, "https://") {
+		s = strings.Replace(s, "https://", "", -1)
+	}
+	return s
+}

etcdctlv3/command/global.go

@@ -28,7 +28,8 @@ import (
 // GlobalFlags are flags that defined globally
 // and are inherited to all sub-commands.
 type GlobalFlags struct {
-	Endpoints []string
+	Endpoints   []string
+	DialTimeout time.Duration
 
 	TLS transport.TLSInfo
 
@@ -44,6 +45,8 @@ func mustClientFromCmd(cmd *cobra.Command) *clientv3.Client {
 		ExitWithError(ExitError, err)
 	}
 
+	dialTimeout := dialTimeoutFromCmd(cmd)
+
 	var cert, key, cacert string
 	if cert, err = cmd.Flags().GetString("cert"); err != nil {
 		ExitWithError(ExitBadArgs, err)
@@ -69,10 +72,10 @@ func mustClientFromCmd(cmd *cobra.Command) *clientv3.Client {
 		ExitWithError(ExitBadFeature, errors.New("unsupported output format"))
 	}
 
-	return mustClient(endpoints, cert, key, cacert)
+	return mustClient(endpoints, dialTimeout, cert, key, cacert)
 }
 
-func mustClient(endpoints []string, cert, key, cacert string) *clientv3.Client {
+func mustClient(endpoints []string, dialTimeout time.Duration, cert, key, cacert string) *clientv3.Client {
 	// set tls if any one tls option set
 	var cfgtls *transport.TLSInfo
 	tls := transport.TLSInfo{}
@@ -94,7 +97,7 @@ func mustClient(endpoints []string, cert, key, cacert string) *clientv3.Client {
 
 	cfg := clientv3.Config{
 		Endpoints:   endpoints,
-		DialTimeout: 20 * time.Second,
+		DialTimeout: dialTimeout,
 	}
 	if cfgtls != nil {
 		clientTLS, err := cfgtls.ClientConfig()
@@ -122,3 +125,11 @@ func argOrStdin(args []string, stdin io.Reader, i int) (string, error) {
 	}
 	return string(bytes), nil
 }
+
+func dialTimeoutFromCmd(cmd *cobra.Command) time.Duration {
+	dialTimeout, err := cmd.Flags().GetDuration("dial-timeout")
+	if err != nil {
+		ExitWithError(ExitError, err)
+	}
+	return dialTimeout
+}

etcdctlv3/command/make_mirror_command.go

@@ -57,7 +57,9 @@ func makeMirrorCommandFunc(cmd *cobra.Command, args []string) {
 		ExitWithError(ExitBadArgs, errors.New("make-mirror takes one destination arguement."))
 	}
 
-	dc := mustClient([]string{args[0]}, mmcert, mmkey, mmcacert)
+	dialTimeout := dialTimeoutFromCmd(cmd)
+
+	dc := mustClient([]string{args[0]}, dialTimeout, mmcert, mmkey, mmcacert)
 	c := mustClientFromCmd(cmd)
 
 	err := makeMirror(context.TODO(), c, dc)

etcdctlv3/main.go

@@ -17,6 +17,7 @@ package main
 
 import (
 	"text/tabwriter"
+	"time"
 
 	"github.com/coreos/etcd/Godeps/_workspace/src/github.com/spf13/cobra"
 	"github.com/coreos/etcd/etcdctlv3/command"
@@ -25,6 +26,8 @@ import (
 const (
 	cliName        = "etcdctlv3"
 	cliDescription = "A simple command line client for etcd3."
+
+	defaultDialTimeout = 2 * time.Second
 )
 
 var (
@@ -46,6 +49,8 @@ func init() {
 	rootCmd.PersistentFlags().StringVarP(&globalFlags.OutputFormat, "write-out", "w", "simple", "set the output format (simple, json, protobuf)")
 	rootCmd.PersistentFlags().BoolVar(&globalFlags.IsHex, "hex", false, "print byte strings as hex encoded strings")
 
+	rootCmd.PersistentFlags().DurationVar(&globalFlags.DialTimeout, "dial-timeout", defaultDialTimeout, "dial timeout for client connections")
+
 	rootCmd.PersistentFlags().StringVar(&globalFlags.TLS.CertFile, "cert", "", "identify secure client using this TLS certificate file")
 	rootCmd.PersistentFlags().StringVar(&globalFlags.TLS.KeyFile, "key", "", "identify secure client using this TLS key file")
 	rootCmd.PersistentFlags().StringVar(&globalFlags.TLS.CAFile, "cacert", "", "verify certificates of TLS-enabled secure servers using this CA bundle")