640 lines
17 KiB
Go
640 lines
17 KiB
Go
// Copyright 2015 CoreOS, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package integration
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import (
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"fmt"
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"io/ioutil"
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"log"
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"math/rand"
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"net"
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"net/http"
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"net/http/httptest"
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"os"
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"reflect"
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"sort"
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"strconv"
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"strings"
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"testing"
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"time"
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"github.com/coreos/etcd/client"
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"github.com/coreos/etcd/etcdserver"
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"github.com/coreos/etcd/etcdserver/etcdhttp"
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"github.com/coreos/etcd/pkg/testutil"
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"github.com/coreos/etcd/pkg/transport"
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"github.com/coreos/etcd/pkg/types"
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"github.com/coreos/etcd/rafthttp"
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"github.com/coreos/etcd/Godeps/_workspace/src/golang.org/x/net/context"
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)
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const (
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tickDuration = 10 * time.Millisecond
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clusterName = "etcd"
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requestTimeout = 2 * time.Second
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)
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var (
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electionTicks = 10
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)
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func init() {
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// open microsecond-level time log for integration test debugging
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log.SetFlags(log.Ltime | log.Lmicroseconds | log.Lshortfile)
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if t := os.Getenv("ETCD_ELECTION_TIMEOUT_TICKS"); t != "" {
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if i, err := strconv.ParseInt(t, 10, 64); err == nil {
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electionTicks = int(i)
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}
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}
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}
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func TestClusterOf1(t *testing.T) { testCluster(t, 1) }
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func TestClusterOf3(t *testing.T) { testCluster(t, 3) }
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func testCluster(t *testing.T, size int) {
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defer afterTest(t)
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c := NewCluster(t, size)
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c.Launch(t)
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defer c.Terminate(t)
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clusterMustProgress(t, c.Members)
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}
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func TestClusterOf1UsingDiscovery(t *testing.T) { testClusterUsingDiscovery(t, 1) }
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func TestClusterOf3UsingDiscovery(t *testing.T) { testClusterUsingDiscovery(t, 3) }
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func testClusterUsingDiscovery(t *testing.T, size int) {
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defer afterTest(t)
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dc := NewCluster(t, 1)
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dc.Launch(t)
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defer dc.Terminate(t)
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// init discovery token space
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dcc := mustNewHTTPClient(t, dc.URLs())
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dkapi := client.NewKeysAPI(dcc)
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ctx, cancel := context.WithTimeout(context.Background(), requestTimeout)
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if _, err := dkapi.Create(ctx, "/_config/size", fmt.Sprintf("%d", size)); err != nil {
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t.Fatal(err)
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}
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cancel()
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c := NewClusterByDiscovery(t, size, dc.URL(0)+"/v2/keys")
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c.Launch(t)
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defer c.Terminate(t)
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clusterMustProgress(t, c.Members)
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}
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func TestDoubleClusterSizeOf1(t *testing.T) { testDoubleClusterSize(t, 1) }
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func TestDoubleClusterSizeOf3(t *testing.T) { testDoubleClusterSize(t, 3) }
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func testDoubleClusterSize(t *testing.T, size int) {
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defer afterTest(t)
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c := NewCluster(t, size)
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c.Launch(t)
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defer c.Terminate(t)
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for i := 0; i < size; i++ {
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c.AddMember(t)
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}
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clusterMustProgress(t, c.Members)
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}
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func TestDecreaseClusterSizeOf3(t *testing.T) { testDecreaseClusterSize(t, 3) }
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func TestDecreaseClusterSizeOf5(t *testing.T) { testDecreaseClusterSize(t, 5) }
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func testDecreaseClusterSize(t *testing.T, size int) {
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defer afterTest(t)
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c := NewCluster(t, size)
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c.Launch(t)
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defer c.Terminate(t)
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// TODO: remove the last but one member
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for i := 0; i < size-1; i++ {
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id := c.Members[len(c.Members)-1].s.ID()
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c.RemoveMember(t, uint64(id))
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c.waitLeader(t, c.Members)
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}
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clusterMustProgress(t, c.Members)
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}
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func TestForceNewCluster(t *testing.T) {
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c := NewCluster(t, 3)
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c.Launch(t)
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cc := mustNewHTTPClient(t, []string{c.Members[0].URL()})
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kapi := client.NewKeysAPI(cc)
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ctx, cancel := context.WithTimeout(context.Background(), requestTimeout)
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resp, err := kapi.Create(ctx, "/foo", "bar")
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if err != nil {
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t.Fatalf("unexpected create error: %v", err)
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}
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cancel()
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// ensure create has been applied in this machine
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ctx, cancel = context.WithTimeout(context.Background(), requestTimeout)
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if _, err := kapi.Watcher("/foo", &client.WatcherOptions{AfterIndex: resp.Node.ModifiedIndex - 1}).Next(ctx); err != nil {
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t.Fatalf("unexpected watch error: %v", err)
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}
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cancel()
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c.Members[0].Stop(t)
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c.Members[1].Terminate(t)
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c.Members[2].Terminate(t)
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c.Members[0].ForceNewCluster = true
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err = c.Members[0].Restart(t)
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if err != nil {
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t.Fatalf("unexpected ForceRestart error: %v", err)
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}
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defer c.Members[0].Terminate(t)
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c.waitLeader(t, c.Members[:1])
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// use new http client to init new connection
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cc = mustNewHTTPClient(t, []string{c.Members[0].URL()})
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kapi = client.NewKeysAPI(cc)
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// ensure force restart keep the old data, and new cluster can make progress
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ctx, cancel = context.WithTimeout(context.Background(), requestTimeout)
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if _, err := kapi.Watcher("/foo", &client.WatcherOptions{AfterIndex: resp.Node.ModifiedIndex - 1}).Next(ctx); err != nil {
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t.Fatalf("unexpected watch error: %v", err)
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}
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cancel()
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clusterMustProgress(t, c.Members[:1])
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}
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// clusterMustProgress ensures that cluster can make progress. It creates
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// a random key first, and check the new key could be got from all client urls
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// of the cluster.
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func clusterMustProgress(t *testing.T, membs []*member) {
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cc := mustNewHTTPClient(t, []string{membs[0].URL()})
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kapi := client.NewKeysAPI(cc)
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ctx, cancel := context.WithTimeout(context.Background(), requestTimeout)
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key := fmt.Sprintf("foo%d", rand.Int())
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resp, err := kapi.Create(ctx, "/"+key, "bar")
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if err != nil {
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t.Fatalf("create on %s error: %v", membs[0].URL(), err)
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}
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cancel()
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for i, m := range membs {
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u := m.URL()
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mcc := mustNewHTTPClient(t, []string{u})
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mkapi := client.NewKeysAPI(mcc)
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mctx, mcancel := context.WithTimeout(context.Background(), requestTimeout)
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if _, err := mkapi.Watcher(key, &client.WatcherOptions{AfterIndex: resp.Node.ModifiedIndex - 1}).Next(mctx); err != nil {
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t.Fatalf("#%d: watch on %s error: %v", i, u, err)
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}
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mcancel()
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}
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}
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// TODO: support TLS
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type cluster struct {
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Members []*member
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}
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func fillClusterForMembers(ms []*member, cName string) error {
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addrs := make([]string, 0)
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for _, m := range ms {
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for _, l := range m.PeerListeners {
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addrs = append(addrs, fmt.Sprintf("%s=%s", m.Name, "http://"+l.Addr().String()))
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}
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}
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clusterStr := strings.Join(addrs, ",")
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var err error
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for _, m := range ms {
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m.Cluster, err = etcdserver.NewClusterFromString(cName, clusterStr)
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if err != nil {
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return err
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}
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}
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return nil
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}
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// NewCluster returns an unlaunched cluster of the given size which has been
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// set to use static bootstrap.
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func NewCluster(t *testing.T, size int) *cluster {
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c := &cluster{}
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ms := make([]*member, size)
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for i := 0; i < size; i++ {
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ms[i] = mustNewMember(t, c.name(i))
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}
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c.Members = ms
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if err := fillClusterForMembers(c.Members, clusterName); err != nil {
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t.Fatal(err)
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}
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return c
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}
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// NewClusterUsingDiscovery returns an unlaunched cluster of the given size
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// which has been set to use the given url as discovery service to bootstrap.
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func NewClusterByDiscovery(t *testing.T, size int, url string) *cluster {
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c := &cluster{}
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ms := make([]*member, size)
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for i := 0; i < size; i++ {
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ms[i] = mustNewMember(t, c.name(i))
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ms[i].DiscoveryURL = url
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}
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c.Members = ms
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return c
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}
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func (c *cluster) Launch(t *testing.T) {
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errc := make(chan error)
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for _, m := range c.Members {
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// Members are launched in separate goroutines because if they boot
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// using discovery url, they have to wait for others to register to continue.
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go func(m *member) {
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errc <- m.Launch()
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}(m)
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}
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for _ = range c.Members {
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if err := <-errc; err != nil {
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t.Fatalf("error setting up member: %v", err)
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}
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}
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// wait cluster to be stable to receive future client requests
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c.waitMembersMatch(t, c.HTTPMembers())
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}
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func (c *cluster) URL(i int) string {
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return c.Members[i].ClientURLs[0].String()
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}
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func (c *cluster) URLs() []string {
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urls := make([]string, 0)
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for _, m := range c.Members {
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for _, u := range m.ClientURLs {
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urls = append(urls, u.String())
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}
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}
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return urls
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}
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func (c *cluster) HTTPMembers() []client.Member {
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ms := make([]client.Member, len(c.Members))
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for i, m := range c.Members {
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ms[i].Name = m.Name
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for _, ln := range m.PeerListeners {
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ms[i].PeerURLs = append(ms[i].PeerURLs, "http://"+ln.Addr().String())
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}
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for _, ln := range m.ClientListeners {
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ms[i].ClientURLs = append(ms[i].ClientURLs, "http://"+ln.Addr().String())
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}
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}
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return ms
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}
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func (c *cluster) AddMember(t *testing.T) {
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clusterStr := c.Members[0].Cluster.String()
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idx := len(c.Members)
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m := mustNewMember(t, c.name(idx))
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// send add request to the cluster
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cc := mustNewHTTPClient(t, []string{c.URL(0)})
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ma := client.NewMembersAPI(cc)
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ctx, cancel := context.WithTimeout(context.Background(), requestTimeout)
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peerURL := "http://" + m.PeerListeners[0].Addr().String()
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if _, err := ma.Add(ctx, peerURL); err != nil {
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t.Fatalf("add member on %s error: %v", c.URL(0), err)
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}
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cancel()
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// wait for the add node entry applied in the cluster
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members := append(c.HTTPMembers(), client.Member{PeerURLs: []string{peerURL}, ClientURLs: []string{}})
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c.waitMembersMatch(t, members)
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for _, ln := range m.PeerListeners {
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clusterStr += fmt.Sprintf(",%s=http://%s", m.Name, ln.Addr().String())
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}
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var err error
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m.Cluster, err = etcdserver.NewClusterFromString(clusterName, clusterStr)
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if err != nil {
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t.Fatal(err)
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}
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m.NewCluster = false
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if err := m.Launch(); err != nil {
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t.Fatal(err)
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}
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c.Members = append(c.Members, m)
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// wait cluster to be stable to receive future client requests
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c.waitMembersMatch(t, c.HTTPMembers())
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}
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func (c *cluster) RemoveMember(t *testing.T, id uint64) {
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// send remove request to the cluster
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cc := mustNewHTTPClient(t, []string{c.URL(0)})
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ma := client.NewMembersAPI(cc)
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ctx, cancel := context.WithTimeout(context.Background(), requestTimeout)
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if err := ma.Remove(ctx, types.ID(id).String()); err != nil {
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t.Fatalf("unexpected remove error %v", err)
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}
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cancel()
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newMembers := make([]*member, 0)
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for _, m := range c.Members {
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if uint64(m.s.ID()) != id {
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newMembers = append(newMembers, m)
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} else {
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select {
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case <-m.s.StopNotify():
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m.Terminate(t)
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// 1s stop delay + election timeout + 1s disk and network delay
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case <-time.After(time.Second + time.Duration(electionTicks)*tickDuration + time.Second):
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t.Fatalf("failed to remove member %s in time", m.s.ID())
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}
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}
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}
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c.Members = newMembers
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c.waitMembersMatch(t, c.HTTPMembers())
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}
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func (c *cluster) Terminate(t *testing.T) {
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for _, m := range c.Members {
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m.Terminate(t)
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}
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}
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func (c *cluster) waitMembersMatch(t *testing.T, membs []client.Member) {
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for _, u := range c.URLs() {
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cc := mustNewHTTPClient(t, []string{u})
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ma := client.NewMembersAPI(cc)
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for {
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ctx, cancel := context.WithTimeout(context.Background(), requestTimeout)
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ms, err := ma.List(ctx)
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cancel()
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if err == nil && isMembersEqual(ms, membs) {
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break
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}
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time.Sleep(tickDuration)
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}
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}
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return
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}
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func (c *cluster) waitLeader(t *testing.T, membs []*member) {
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possibleLead := make(map[uint64]bool)
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var lead uint64
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for _, m := range membs {
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possibleLead[uint64(m.s.ID())] = true
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}
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for lead == 0 || !possibleLead[lead] {
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lead = 0
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for _, m := range membs {
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if lead != 0 && lead != m.s.Lead() {
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lead = 0
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break
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}
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lead = m.s.Lead()
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}
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time.Sleep(10 * tickDuration)
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}
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}
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func (c *cluster) name(i int) string {
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return fmt.Sprint("node", i)
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}
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// isMembersEqual checks whether two members equal except ID field.
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// The given wmembs should always set ID field to empty string.
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func isMembersEqual(membs []client.Member, wmembs []client.Member) bool {
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sort.Sort(SortableMemberSliceByPeerURLs(membs))
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sort.Sort(SortableMemberSliceByPeerURLs(wmembs))
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for i := range membs {
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membs[i].ID = ""
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}
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return reflect.DeepEqual(membs, wmembs)
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}
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func newLocalListener(t *testing.T) net.Listener {
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l, err := net.Listen("tcp", "127.0.0.1:0")
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if err != nil {
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t.Fatal(err)
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}
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return l
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}
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func newListenerWithAddr(t *testing.T, addr string) net.Listener {
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var err error
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var l net.Listener
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// TODO: we want to reuse a previous closed port immediately.
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// a better way is to set SO_REUSExx instead of doing retry.
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for i := 0; i < 5; i++ {
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l, err = net.Listen("tcp", addr)
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if err == nil {
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break
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}
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time.Sleep(500 * time.Millisecond)
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}
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if err != nil {
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t.Fatal(err)
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}
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return l
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}
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type member struct {
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etcdserver.ServerConfig
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PeerListeners, ClientListeners []net.Listener
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raftHandler *testutil.PauseableHandler
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s *etcdserver.EtcdServer
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hss []*httptest.Server
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}
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func mustNewMember(t *testing.T, name string) *member {
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var err error
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m := &member{}
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pln := newLocalListener(t)
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m.PeerListeners = []net.Listener{pln}
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m.PeerURLs, err = types.NewURLs([]string{"http://" + pln.Addr().String()})
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if err != nil {
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t.Fatal(err)
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}
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cln := newLocalListener(t)
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m.ClientListeners = []net.Listener{cln}
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m.ClientURLs, err = types.NewURLs([]string{"http://" + cln.Addr().String()})
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if err != nil {
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t.Fatal(err)
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}
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m.Name = name
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m.DataDir, err = ioutil.TempDir(os.TempDir(), "etcd")
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if err != nil {
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t.Fatal(err)
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}
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clusterStr := fmt.Sprintf("%s=http://%s", name, pln.Addr().String())
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m.Cluster, err = etcdserver.NewClusterFromString(clusterName, clusterStr)
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if err != nil {
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t.Fatal(err)
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}
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m.NewCluster = true
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m.Transport = mustNewTransport(t)
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m.ElectionTicks = electionTicks
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m.TickMs = uint(tickDuration / time.Millisecond)
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return m
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}
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// Clone returns a member with the same server configuration. The returned
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// member will not set PeerListeners and ClientListeners.
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func (m *member) Clone(t *testing.T) *member {
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mm := &member{}
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mm.ServerConfig = m.ServerConfig
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var err error
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clientURLStrs := m.ClientURLs.StringSlice()
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mm.ClientURLs, err = types.NewURLs(clientURLStrs)
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if err != nil {
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// this should never fail
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panic(err)
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}
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peerURLStrs := m.PeerURLs.StringSlice()
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mm.PeerURLs, err = types.NewURLs(peerURLStrs)
|
|
if err != nil {
|
|
// this should never fail
|
|
panic(err)
|
|
}
|
|
clusterStr := m.Cluster.String()
|
|
mm.Cluster, err = etcdserver.NewClusterFromString(clusterName, clusterStr)
|
|
if err != nil {
|
|
// this should never fail
|
|
panic(err)
|
|
}
|
|
mm.Transport = mustNewTransport(t)
|
|
mm.ElectionTicks = m.ElectionTicks
|
|
return mm
|
|
}
|
|
|
|
// Launch starts a member based on ServerConfig, PeerListeners
|
|
// and ClientListeners.
|
|
func (m *member) Launch() error {
|
|
var err error
|
|
if m.s, err = etcdserver.NewServer(&m.ServerConfig); err != nil {
|
|
return fmt.Errorf("failed to initialize the etcd server: %v", err)
|
|
}
|
|
m.s.SyncTicker = time.Tick(500 * time.Millisecond)
|
|
m.s.Start()
|
|
|
|
m.raftHandler = &testutil.PauseableHandler{Next: etcdhttp.NewPeerHandler(m.s.Cluster, m.s, m.s.RaftHandler())}
|
|
|
|
for _, ln := range m.PeerListeners {
|
|
hs := &httptest.Server{
|
|
Listener: ln,
|
|
Config: &http.Server{Handler: m.raftHandler},
|
|
}
|
|
hs.Start()
|
|
m.hss = append(m.hss, hs)
|
|
}
|
|
for _, ln := range m.ClientListeners {
|
|
hs := &httptest.Server{
|
|
Listener: ln,
|
|
Config: &http.Server{Handler: etcdhttp.NewClientHandler(m.s)},
|
|
}
|
|
hs.Start()
|
|
m.hss = append(m.hss, hs)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (m *member) WaitOK(t *testing.T) {
|
|
cc := mustNewHTTPClient(t, []string{m.URL()})
|
|
kapi := client.NewKeysAPI(cc)
|
|
for {
|
|
ctx, cancel := context.WithTimeout(context.Background(), requestTimeout)
|
|
_, err := kapi.Get(ctx, "/", nil)
|
|
if err != nil {
|
|
time.Sleep(tickDuration)
|
|
continue
|
|
}
|
|
cancel()
|
|
break
|
|
}
|
|
for m.s.Leader() == 0 {
|
|
time.Sleep(tickDuration)
|
|
}
|
|
}
|
|
|
|
func (m *member) URL() string { return m.ClientURLs[0].String() }
|
|
|
|
func (m *member) Pause() {
|
|
m.raftHandler.Pause()
|
|
m.s.PauseSending()
|
|
}
|
|
|
|
func (m *member) Resume() {
|
|
m.raftHandler.Resume()
|
|
m.s.ResumeSending()
|
|
}
|
|
|
|
// Stop stops the member, but the data dir of the member is preserved.
|
|
func (m *member) Stop(t *testing.T) {
|
|
m.s.Stop()
|
|
for _, hs := range m.hss {
|
|
hs.CloseClientConnections()
|
|
hs.Close()
|
|
}
|
|
m.hss = nil
|
|
}
|
|
|
|
// Start starts the member using the preserved data dir.
|
|
func (m *member) Restart(t *testing.T) error {
|
|
newPeerListeners := make([]net.Listener, 0)
|
|
for _, ln := range m.PeerListeners {
|
|
newPeerListeners = append(newPeerListeners, newListenerWithAddr(t, ln.Addr().String()))
|
|
}
|
|
m.PeerListeners = newPeerListeners
|
|
newClientListeners := make([]net.Listener, 0)
|
|
for _, ln := range m.ClientListeners {
|
|
newClientListeners = append(newClientListeners, newListenerWithAddr(t, ln.Addr().String()))
|
|
}
|
|
m.ClientListeners = newClientListeners
|
|
return m.Launch()
|
|
}
|
|
|
|
// Terminate stops the member and removes the data dir.
|
|
func (m *member) Terminate(t *testing.T) {
|
|
m.s.Stop()
|
|
for _, hs := range m.hss {
|
|
hs.CloseClientConnections()
|
|
hs.Close()
|
|
}
|
|
if err := os.RemoveAll(m.ServerConfig.DataDir); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
}
|
|
|
|
func mustNewHTTPClient(t *testing.T, eps []string) client.Client {
|
|
cfg := client.Config{Transport: mustNewTransport(t), Endpoints: eps}
|
|
c, err := client.New(cfg)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
return c
|
|
}
|
|
|
|
func mustNewTransport(t *testing.T) *http.Transport {
|
|
tr, err := transport.NewTimeoutTransport(transport.TLSInfo{}, rafthttp.DialTimeout, rafthttp.ConnReadTimeout, rafthttp.ConnWriteTimeout)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
return tr
|
|
}
|
|
|
|
type SortableMemberSliceByPeerURLs []client.Member
|
|
|
|
func (p SortableMemberSliceByPeerURLs) Len() int { return len(p) }
|
|
func (p SortableMemberSliceByPeerURLs) Less(i, j int) bool {
|
|
return p[i].PeerURLs[0] < p[j].PeerURLs[0]
|
|
}
|
|
func (p SortableMemberSliceByPeerURLs) Swap(i, j int) { p[i], p[j] = p[j], p[i] }
|