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ha_test.go
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// Copyright 2015 Sorint.lab
//
// 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 integration
import (
"context"
"database/sql"
"fmt"
"io/ioutil"
"os"
"path/filepath"
"strings"
"syscall"
"testing"
"time"
uuid "github.com/satori/go.uuid"
"github.com/sorintlab/stolon/internal/cluster"
"github.com/sorintlab/stolon/internal/common"
pg "github.com/sorintlab/stolon/internal/postgresql"
"github.com/sorintlab/stolon/internal/store"
)
const (
pgReplUsername = "stolon_repluser"
pgReplPassword = "stolon_replpassword"
pgSUUsername = "stolon_superuser"
pgSUPassword = "stolon_superuserpassword"
)
type testKeepers map[string]*TestKeeper
type testSentinels map[string]*TestSentinel
func setupStore(t *testing.T, dir string) *TestStore {
tstore, err := NewTestStore(t, dir)
if err != nil {
t.Fatalf("unexpected err: %v", err)
}
if err := tstore.Start(); err != nil {
t.Fatalf("unexpected err: %v", err)
}
if err := tstore.WaitUp(30 * time.Second); err != nil {
t.Fatalf("error waiting on store up: %v", err)
}
return tstore
}
func TestInitWithMultipleKeepers(t *testing.T) {
t.Parallel()
dir, err := ioutil.TempDir("", "stolon")
if err != nil {
t.Fatalf("unexpected err: %v", err)
}
defer os.RemoveAll(dir)
tstore := setupStore(t, dir)
storeEndpoints := fmt.Sprintf("%s:%s", tstore.listenAddress, tstore.port)
clusterName := uuid.NewV4().String()
storePath := filepath.Join(common.StorePrefix, clusterName)
sm := store.NewKVBackedStore(tstore.store, storePath)
initialClusterSpec := &cluster.ClusterSpec{
InitMode: cluster.ClusterInitModeP(cluster.ClusterInitModeNew),
FailInterval: &cluster.Duration{Duration: 10 * time.Second},
ConvergenceTimeout: &cluster.Duration{Duration: 30 * time.Second},
}
initialClusterSpecFile, err := writeClusterSpec(dir, initialClusterSpec)
if err != nil {
t.Fatalf("unexpected err: %v", err)
}
tks := testKeepers{}
tss := testSentinels{}
// Start 3 keepers
for i := uint8(0); i < 3; i++ {
tk, err := NewTestKeeper(t, dir, clusterName, pgSUUsername, pgSUPassword, pgReplUsername, pgReplPassword, tstore.storeBackend, storeEndpoints)
if err != nil {
t.Fatalf("unexpected err: %v", err)
}
if err := tk.Start(); err != nil {
t.Fatalf("unexpected err: %v", err)
}
tks[tk.uid] = tk
}
// Start 2 sentinels
for i := uint8(0); i < 2; i++ {
ts, err := NewTestSentinel(t, dir, clusterName, tstore.storeBackend, storeEndpoints, fmt.Sprintf("--initial-cluster-spec=%s", initialClusterSpecFile))
if err != nil {
t.Fatalf("unexpected err: %v", err)
}
if err := ts.Start(); err != nil {
t.Fatalf("unexpected err: %v", err)
}
tss[ts.uid] = ts
}
defer shutdown(tks, tss, nil, tstore)
// Wait for clusterView containing a master
masterUID, err := WaitClusterDataWithMaster(sm, 60*time.Second)
if err != nil {
t.Fatal("expected a master in cluster view")
}
waitKeeperReady(t, sm, tks[masterUID])
}
func setupServers(t *testing.T, clusterName, dir string, numKeepers, numSentinels uint8, syncRepl bool, usePgrewind bool, primaryKeeper *TestKeeper) (testKeepers, testSentinels, *TestProxy, *TestStore) {
var initialClusterSpec *cluster.ClusterSpec
if primaryKeeper == nil {
initialClusterSpec = &cluster.ClusterSpec{
InitMode: cluster.ClusterInitModeP(cluster.ClusterInitModeNew),
SleepInterval: &cluster.Duration{Duration: 2 * time.Second},
FailInterval: &cluster.Duration{Duration: 5 * time.Second},
ConvergenceTimeout: &cluster.Duration{Duration: 30 * time.Second},
MaxStandbyLag: cluster.Uint32P(50 * 1024), // limit lag to 50kiB
SynchronousReplication: cluster.BoolP(syncRepl),
UsePgrewind: cluster.BoolP(usePgrewind),
PGParameters: defaultPGParameters,
}
} else {
// if primaryKeeper is provided then we should create a standby cluster and do a
// pitr recovery from the external primary database
pgpass, err := ioutil.TempFile(dir, "pgpass")
if err != nil {
t.Fatalf("unexpected err: %v", err)
}
if _, err := pgpass.WriteString(fmt.Sprintf("%s:%s:*:%s:%s\n", primaryKeeper.pgListenAddress, primaryKeeper.pgPort, primaryKeeper.pgReplUsername, primaryKeeper.pgReplPassword)); err != nil {
t.Fatalf("unexpected err: %v", err)
}
pgpass.Close()
initialClusterSpec = &cluster.ClusterSpec{
InitMode: cluster.ClusterInitModeP(cluster.ClusterInitModePITR),
Role: cluster.ClusterRoleP(cluster.ClusterRoleStandby),
SleepInterval: &cluster.Duration{Duration: 2 * time.Second},
FailInterval: &cluster.Duration{Duration: 5 * time.Second},
ConvergenceTimeout: &cluster.Duration{Duration: 30 * time.Second},
MaxStandbyLag: cluster.Uint32P(50 * 1024), // limit lag to 50kiB
SynchronousReplication: cluster.BoolP(syncRepl),
PGParameters: defaultPGParameters,
PITRConfig: &cluster.PITRConfig{
DataRestoreCommand: fmt.Sprintf("PGPASSFILE=%s pg_basebackup -D %%d -h %s -p %s -U %s", pgpass.Name(), primaryKeeper.pgListenAddress, primaryKeeper.pgPort, primaryKeeper.pgReplUsername),
},
StandbyConfig: &cluster.StandbyConfig{
StandbySettings: &cluster.StandbySettings{
PrimaryConninfo: fmt.Sprintf("sslmode=disable host=%s port=%s user=%s password=%s", primaryKeeper.pgListenAddress, primaryKeeper.pgPort, primaryKeeper.pgReplUsername, primaryKeeper.pgReplPassword),
},
},
}
}
return setupServersCustom(t, clusterName, dir, numKeepers, numSentinels, initialClusterSpec)
}
func setupServersCustom(t *testing.T, clusterName, dir string, numKeepers, numSentinels uint8, initialClusterSpec *cluster.ClusterSpec) (testKeepers, testSentinels, *TestProxy, *TestStore) {
tstore := setupStore(t, dir)
storeEndpoints := fmt.Sprintf("%s:%s", tstore.listenAddress, tstore.port)
initialClusterSpecFile, err := writeClusterSpec(dir, initialClusterSpec)
if err != nil {
t.Fatalf("unexpected err: %v", err)
}
tks := map[string]*TestKeeper{}
tss := map[string]*TestSentinel{}
// Start sentinels
for i := uint8(0); i < numSentinels; i++ {
ts, err := NewTestSentinel(t, dir, clusterName, tstore.storeBackend, storeEndpoints, fmt.Sprintf("--initial-cluster-spec=%s", initialClusterSpecFile))
if err != nil {
t.Fatalf("unexpected err: %v", err)
}
if err := ts.Start(); err != nil {
t.Fatalf("unexpected err: %v", err)
}
tss[ts.uid] = ts
}
// Start other keepers
for i := uint8(0); i < numKeepers; i++ {
tk, err := NewTestKeeper(t, dir, clusterName, pgSUUsername, pgSUPassword, pgReplUsername, pgReplPassword, tstore.storeBackend, storeEndpoints)
if err != nil {
t.Fatalf("unexpected err: %v", err)
}
if err := tk.Start(); err != nil {
t.Fatalf("unexpected err: %v", err)
}
tks[tk.uid] = tk
}
tp, err := NewTestProxy(t, dir, clusterName, pgSUUsername, pgSUPassword, pgReplUsername, pgReplPassword, tstore.storeBackend, storeEndpoints)
if err != nil {
t.Fatalf("unexpected err: %v", err)
}
if err := tp.Start(); err != nil {
t.Fatalf("unexpected err: %v", err)
}
return tks, tss, tp, tstore
}
func populate(t *testing.T, tk *TestKeeper) error {
_, err := tk.Exec("CREATE TABLE table01(ID INT PRIMARY KEY NOT NULL, VALUE INT NOT NULL)")
return err
}
func write(t *testing.T, tk *TestKeeper, id, value int) error {
_, err := tk.Exec("INSERT INTO table01 VALUES ($1, $2)", id, value)
return err
}
func getLines(t *testing.T, q Querier) (int, error) {
rows, err := q.Query("SELECT FROM table01")
if err != nil {
return 0, err
}
c := 0
for rows.Next() {
c++
}
return c, rows.Err()
}
func waitLines(t *testing.T, q Querier, num int, timeout time.Duration) error {
start := time.Now()
c := -1
for time.Now().Add(-timeout).Before(start) {
c, err := getLines(t, q)
if err != nil {
goto end
}
if c == num {
return nil
}
end:
time.Sleep(2 * time.Second)
}
return fmt.Errorf("timeout waiting for %d lines, got: %d", num, c)
}
func shutdown(tks map[string]*TestKeeper, tss map[string]*TestSentinel, tp *TestProxy, tstore *TestStore) {
for _, ts := range tss {
if ts.cmd != nil {
ts.Stop()
}
}
for _, tk := range tks {
if tk.cmd != nil {
tk.Stop()
}
}
if tp != nil {
if tp.cmd != nil {
tp.Kill()
}
}
if tstore.cmd != nil {
tstore.Kill()
}
}
func waitKeeperReady(t *testing.T, sm *store.KVBackedStore, keeper *TestKeeper) {
if err := WaitClusterDataKeeperInitialized(keeper.uid, sm, 60*time.Second); err != nil {
t.Fatalf("unexpected err: %v", err)
}
if err := keeper.WaitDBUp(60 * time.Second); err != nil {
t.Fatalf("unexpected err: %v", err)
}
}
func waitMasterStandbysReady(t *testing.T, sm *store.KVBackedStore, tks testKeepers) (master *TestKeeper, standbys []*TestKeeper) {
// Wait for normal cluster phase (master ready)
masterUID, err := WaitClusterDataWithMaster(sm, 60*time.Second)
if err != nil {
t.Fatalf("unexpected err: %v", err)
}
master = tks[masterUID]
// Return all other keepers as standbys (assume that MaxStandbysPerSender is greater the the number of keepers)
for _, tk := range tks {
if tk.uid == masterUID {
continue
}
standbys = append(standbys, tk)
}
waitKeeperReady(t, sm, master)
for _, standby := range standbys {
waitKeeperReady(t, sm, standby)
}
return
}
func testMasterStandby(t *testing.T, syncRepl bool) {
dir, err := ioutil.TempDir("", "stolon")
if err != nil {
t.Fatalf("unexpected err: %v", err)
}
defer os.RemoveAll(dir)
clusterName := uuid.NewV4().String()
tks, tss, tp, tstore := setupServers(t, clusterName, dir, 2, 1, syncRepl, false, nil)
defer shutdown(tks, tss, tp, tstore)
storePath := filepath.Join(common.StorePrefix, clusterName)
sm := store.NewKVBackedStore(tstore.store, storePath)
master, standbys := waitMasterStandbysReady(t, sm, tks)
standby := standbys[0]
if syncRepl {
if err := WaitClusterDataSynchronousStandbys([]string{standby.uid}, sm, 30*time.Second); err != nil {
t.Fatalf("expected synchronous standby on keeper %q in cluster data", standby.uid)
}
}
if err := populate(t, master); err != nil {
t.Fatalf("unexpected err: %v", err)
}
if err := write(t, master, 1, 1); err != nil {
t.Fatalf("unexpected err: %v", err)
}
c, err := getLines(t, master)
if err != nil {
t.Fatalf("unexpected err: %v", err)
}
if c != 1 {
t.Fatalf("wrong number of lines, want: %d, got: %d", 1, c)
}
if err := waitLines(t, standby, 1, 30*time.Second); err != nil {
t.Fatalf("unexpected err: %v", err)
}
}
func TestMasterStandby(t *testing.T) {
t.Parallel()
testMasterStandby(t, false)
}
func TestMasterStandbySyncRepl(t *testing.T) {
t.Parallel()
testMasterStandby(t, true)
}
func testFailover(t *testing.T, syncRepl bool, standbyCluster bool) {
dir, err := ioutil.TempDir("", "stolon")
if err != nil {
t.Fatalf("unexpected err: %v", err)
}
defer os.RemoveAll(dir)
var ptk *TestKeeper
var primary *TestKeeper
if standbyCluster {
primaryClusterName := uuid.NewV4().String()
ptks, ptss, ptp, ptstore := setupServers(t, primaryClusterName, dir, 1, 1, false, false, nil)
defer shutdown(ptks, ptss, ptp, ptstore)
for _, ptk = range ptks {
break
}
primary = ptk
}
clusterName := uuid.NewV4().String()
tks, tss, tp, tstore := setupServers(t, clusterName, dir, 2, 1, syncRepl, false, ptk)
defer shutdown(tks, tss, tp, tstore)
storePath := filepath.Join(common.StorePrefix, clusterName)
sm := store.NewKVBackedStore(tstore.store, storePath)
master, standbys := waitMasterStandbysReady(t, sm, tks)
standby := standbys[0]
if !standbyCluster {
primary = master
}
// a standby cluster will disable syncRepl since it's not possible to do sync repl on cascading standbys
if syncRepl && !standbyCluster {
if err := WaitClusterDataSynchronousStandbys([]string{standby.uid}, sm, 30*time.Second); err != nil {
t.Fatalf("expected synchronous standby on keeper %q in cluster data", standby.uid)
}
}
if err := populate(t, primary); err != nil {
t.Fatalf("unexpected err: %v", err)
}
if err := write(t, primary, 1, 1); err != nil {
t.Fatalf("unexpected err: %v", err)
}
// get the primary/master XLogPos
xLogPos, err := GetXLogPos(primary)
if err != nil {
t.Fatalf("unexpected err: %v", err)
}
// wait for the keepers to have reported their state
if err := WaitClusterSyncedXLogPos([]*TestKeeper{master, standby}, xLogPos, sm, 20*time.Second); err != nil {
t.Fatalf("unexpected err: %v", err)
}
// the proxy should connect to the right master
if err := tp.WaitRightMaster(master, 3*cluster.DefaultProxyCheckInterval); err != nil {
t.Fatalf("unexpected err: %v", err)
}
// Stop the keeper process on master, should also stop the database
t.Logf("Stopping current master keeper: %s", master.uid)
master.Stop()
// Wait for cluster data containing standby as master
if err := WaitClusterDataMaster(standby.uid, sm, 30*time.Second); err != nil {
t.Fatalf("expected master %q in cluster view", standby.uid)
}
if err := standby.WaitDBRole(common.RoleMaster, ptk, 30*time.Second); err != nil {
t.Fatalf("unexpected err: %v", err)
}
c, err := getLines(t, standby)
if err != nil {
t.Fatalf("unexpected err: %v", err)
}
if c != 1 {
t.Fatalf("wrong number of lines, want: %d, got: %d", 1, c)
}
// the proxy should connect to the right master
if err := tp.WaitRightMaster(standby, 3*cluster.DefaultProxyCheckInterval); err != nil {
t.Fatalf("unexpected err: %v", err)
}
}
func TestFailover(t *testing.T) {
t.Parallel()
testFailover(t, false, false)
}
func TestFailoverSyncRepl(t *testing.T) {
t.Parallel()
testFailover(t, true, false)
}
func TestFailoverStandbyCluster(t *testing.T) {
t.Parallel()
testFailover(t, false, true)
}
func TestFailoverSyncReplStandbyCluster(t *testing.T) {
t.Parallel()
testFailover(t, false, true)
}
// Tests standby elected as new master but fails to become master. Then old
// master comes back and is re-elected as master.
func testFailoverFailed(t *testing.T, syncRepl bool, standbyCluster bool) {
dir, err := ioutil.TempDir("", "stolon")
if err != nil {
t.Fatalf("unexpected err: %v", err)
}
defer os.RemoveAll(dir)
var ptk *TestKeeper
var primary *TestKeeper
if standbyCluster {
primaryClusterName := uuid.NewV4().String()
ptks, ptss, ptp, ptstore := setupServers(t, primaryClusterName, dir, 1, 1, false, false, nil)
defer shutdown(ptks, ptss, ptp, ptstore)
for _, ptk = range ptks {
break
}
primary = ptk
}
clusterName := uuid.NewV4().String()
tks, tss, tp, tstore := setupServers(t, clusterName, dir, 2, 1, syncRepl, false, ptk)
defer shutdown(tks, tss, tp, tstore)
storePath := filepath.Join(common.StorePrefix, clusterName)
sm := store.NewKVBackedStore(tstore.store, storePath)
master, standbys := waitMasterStandbysReady(t, sm, tks)
standby := standbys[0]
if !standbyCluster {
primary = master
}
// a standby cluster will disable syncRepl since it's not possible to do sync repl on cascading standbys
if syncRepl && !standbyCluster {
if err := WaitClusterDataSynchronousStandbys([]string{standby.uid}, sm, 30*time.Second); err != nil {
t.Fatalf("expected synchronous standby on keeper %q in cluster data", standby.uid)
}
}
if err := populate(t, primary); err != nil {
t.Fatalf("unexpected err: %v", err)
}
if err := write(t, primary, 1, 1); err != nil {
t.Fatalf("unexpected err: %v", err)
}
// get the primary/master XLogPos
xLogPos, err := GetXLogPos(primary)
if err != nil {
t.Fatalf("unexpected err: %v", err)
}
// wait for the keepers to have reported their state
if err := WaitClusterSyncedXLogPos([]*TestKeeper{master, standby}, xLogPos, sm, 20*time.Second); err != nil {
t.Fatalf("unexpected err: %v", err)
}
// Stop the keeper process on master, should also stop the database
t.Logf("Stopping current master keeper: %s", master.uid)
master.Stop()
// Wait for cluster data containing standby as master
if err := WaitClusterDataMaster(standby.uid, sm, 30*time.Second); err != nil {
t.Fatalf("expected master %q in cluster view", standby.uid)
}
// Stopping standby before reading the new cluster data and promoting
// TODO(sgotti) this is flacky and the standby can read the data and
// publish new state before it's stopped
t.Logf("Stopping current standby keeper: %s", standby.uid)
standby.Stop()
t.Logf("Starting previous master keeper: %s", master.uid)
if err := master.Start(); err != nil {
t.Fatalf("unexpected err: %v", err)
}
// Wait for cluster data containing previous master as master
err = WaitClusterDataMaster(master.uid, sm, 30*time.Second)
if !syncRepl && err != nil {
t.Fatalf("expected master %q in cluster view", master.uid)
}
if syncRepl && !standbyCluster {
if err == nil {
t.Fatalf("expected timeout since with synchronous replication the old master shouldn't be elected as master")
}
}
}
func TestFailoverFailed(t *testing.T) {
t.Parallel()
testFailoverFailed(t, false, false)
}
func TestFailoverFailedSyncRepl(t *testing.T) {
t.Parallel()
testFailoverFailed(t, true, false)
}
func TestFailoverFailedStandbyCluster(t *testing.T) {
t.Parallel()
testFailoverFailed(t, true, true)
}
// test that a standby with a lag (reported) greater than MaxStandbyLag from the
// master (reported) xlogpos won't be elected as the new master. This test is
// valid only for asynchronous replication
func testFailoverTooMuchLag(t *testing.T, standbyCluster bool) {
dir, err := ioutil.TempDir("", "stolon")
if err != nil {
t.Fatalf("unexpected err: %v", err)
}
defer os.RemoveAll(dir)
var ptk *TestKeeper
var primary *TestKeeper
if standbyCluster {
primaryClusterName := uuid.NewV4().String()
ptks, ptss, ptp, ptstore := setupServers(t, primaryClusterName, dir, 1, 1, false, false, nil)
defer shutdown(ptks, ptss, ptp, ptstore)
for _, ptk = range ptks {
break
}
primary = ptk
}
clusterName := uuid.NewV4().String()
tks, tss, tp, tstore := setupServers(t, clusterName, dir, 2, 1, false, false, ptk)
defer shutdown(tks, tss, tp, tstore)
storePath := filepath.Join(common.StorePrefix, clusterName)
sm := store.NewKVBackedStore(tstore.store, storePath)
master, standbys := waitMasterStandbysReady(t, sm, tks)
standby := standbys[0]
if !standbyCluster {
primary = master
}
if err := populate(t, primary); err != nil {
t.Fatalf("unexpected err: %v", err)
}
// stop the standby and write more than MaxStandbyLag data to the master
t.Logf("Stopping current standby keeper: %s", standby.uid)
standby.Stop()
if err := standby.WaitDBDown(30 * time.Second); err != nil {
t.Fatalf("unexpected err: %v", err)
}
for i := 1; i < 1000; i++ {
if err := write(t, primary, i, i); err != nil {
t.Fatalf("unexpected err: %v", err)
}
}
// wait for the master to have reported its state
time.Sleep(5 * time.Second)
// Stop the keeper process on master, should also stop the database
t.Logf("Stopping current master keeper: %s", master.uid)
master.Stop()
// start the standby
t.Logf("Starting current standby keeper: %s", standby.uid)
if err := standby.Start(); err != nil {
t.Fatalf("unexpected err: %v", err)
}
// standby shouldn't be elected as master since its lag is greater than MaxStandbyLag
if err := standby.WaitDBRole(common.RoleMaster, ptk, 30*time.Second); err == nil {
t.Fatalf("standby shouldn't be elected as master")
}
}
func TestFailoverTooMuchLag(t *testing.T) {
t.Parallel()
testFailoverTooMuchLag(t, false)
}
func TestFailoverTooMuchLagStandbyCluster(t *testing.T) {
t.Parallel()
testFailoverTooMuchLag(t, true)
}
func testOldMasterRestart(t *testing.T, syncRepl, usePgrewind bool, standbyCluster bool) {
dir, err := ioutil.TempDir("", "stolon")
if err != nil {
t.Fatalf("unexpected err: %v", err)
}
defer os.RemoveAll(dir)
var ptk *TestKeeper
var primary *TestKeeper
if standbyCluster {
primaryClusterName := uuid.NewV4().String()
ptks, ptss, ptp, ptstore := setupServers(t, primaryClusterName, dir, 1, 1, false, false, nil)
defer shutdown(ptks, ptss, ptp, ptstore)
for _, ptk = range ptks {
break
}
primary = ptk
}
clusterName := uuid.NewV4().String()
tks, tss, tp, tstore := setupServers(t, clusterName, dir, 2, 1, syncRepl, usePgrewind, ptk)
defer shutdown(tks, tss, tp, tstore)
storeEndpoints := fmt.Sprintf("%s:%s", tstore.listenAddress, tstore.port)
storePath := filepath.Join(common.StorePrefix, clusterName)
sm := store.NewKVBackedStore(tstore.store, storePath)
master, standbys := waitMasterStandbysReady(t, sm, tks)
if !standbyCluster {
primary = master
}
if syncRepl && !standbyCluster {
if err := WaitClusterDataSynchronousStandbys([]string{standbys[0].uid}, sm, 30*time.Second); err != nil {
t.Fatalf("expected synchronous standby on keeper %q in cluster data", standbys[0].uid)
}
}
if err := populate(t, primary); err != nil {
t.Fatalf("unexpected err: %v", err)
}
if err := write(t, primary, 1, 1); err != nil {
t.Fatalf("unexpected err: %v", err)
}
// get the primary/master XLogPos
xLogPos, err := GetXLogPos(primary)
if err != nil {
t.Fatalf("unexpected err: %v", err)
}
// wait for the keepers to have reported their state
if err := WaitClusterSyncedXLogPos([]*TestKeeper{master, standbys[0]}, xLogPos, sm, 20*time.Second); err != nil {
t.Fatalf("unexpected err: %v", err)
}
// Stop the keeper process on master, should also stop the database
t.Logf("Stopping current master keeper: %s", master.uid)
master.Stop()
if err := standbys[0].WaitDBRole(common.RoleMaster, ptk, 30*time.Second); err != nil {
t.Fatalf("unexpected err: %v", err)
}
c, err := getLines(t, standbys[0])
if err != nil {
t.Fatalf("unexpected err: %v", err)
}
if c != 1 {
t.Fatalf("wrong number of lines, want: %d, got: %d", 1, c)
}
// Add another standby so we'll have 2 standbys. With only 1 standby,
// when using synchronous replication, the test will block forever when
// writing to the new master since there's not active synchronous
// standby.
tk, err := NewTestKeeper(t, dir, clusterName, pgSUUsername, pgSUPassword, pgReplUsername, pgReplPassword, tstore.storeBackend, storeEndpoints)
if err != nil {
t.Fatalf("unexpected err: %v", err)
}
tks[tk.uid] = tk
if err := tk.Start(); err != nil {
t.Fatalf("unexpected err: %v", err)
}
standbys = append(standbys, tk)
// Wait replicated data to standby
if err := waitLines(t, standbys[1], 1, 30*time.Second); err != nil {
t.Fatalf("unexpected err: %v", err)
}
if !standbyCluster {
primary = standbys[0]
}
if err := write(t, primary, 2, 2); err != nil {
t.Fatalf("unexpected err: %v", err)
}
// Restart the old master
t.Logf("Restarting old master keeper: %s", master.uid)
if err := master.Start(); err != nil {
t.Fatalf("unexpected err: %v", err)
}
// Wait old master synced with standby
if err := waitLines(t, master, 2, 60*time.Second); err != nil {
t.Fatalf("unexpected err: %v", err)
}
if err := master.WaitDBRole(common.RoleStandby, ptk, 30*time.Second); err != nil {
t.Fatalf("unexpected err: %v", err)
}
}
func TestOldMasterRestart(t *testing.T) {
t.Parallel()
testOldMasterRestart(t, false, false, false)
}
func TestOldMasterRestartSyncRepl(t *testing.T) {
t.Parallel()
testOldMasterRestart(t, true, false, false)
}
func TestOldMasterRestartPgrewind(t *testing.T) {
t.Parallel()
testOldMasterRestart(t, false, true, false)
}
func TestOldMasterRestartSyncReplPgrewind(t *testing.T) {
t.Parallel()
testOldMasterRestart(t, true, true, false)
}
func TestOldMasterRestartStandbyCluster(t *testing.T) {
t.Parallel()
testOldMasterRestart(t, false, false, true)
}
func testPartition1(t *testing.T, syncRepl, usePgrewind bool, standbyCluster bool) {
dir, err := ioutil.TempDir("", "stolon")
if err != nil {
t.Fatalf("unexpected err: %v", err)
}
defer os.RemoveAll(dir)
var ptk *TestKeeper
var primary *TestKeeper
if standbyCluster {
primaryClusterName := uuid.NewV4().String()
ptks, ptss, ptp, ptstore := setupServers(t, primaryClusterName, dir, 1, 1, false, false, nil)
defer shutdown(ptks, ptss, ptp, ptstore)
for _, ptk = range ptks {
break
}
primary = ptk
}
clusterName := uuid.NewV4().String()
tks, tss, tp, tstore := setupServers(t, clusterName, dir, 2, 1, syncRepl, usePgrewind, ptk)
defer shutdown(tks, tss, tp, tstore)
storeEndpoints := fmt.Sprintf("%s:%s", tstore.listenAddress, tstore.port)
storePath := filepath.Join(common.StorePrefix, clusterName)
sm := store.NewKVBackedStore(tstore.store, storePath)
master, standbys := waitMasterStandbysReady(t, sm, tks)
if !standbyCluster {
primary = master
}
if syncRepl && !standbyCluster {
if err := WaitClusterDataSynchronousStandbys([]string{standbys[0].uid}, sm, 30*time.Second); err != nil {
t.Fatalf("expected synchronous standby on keeper %q in cluster data", standbys[0].uid)
}
}
if err := populate(t, primary); err != nil {
t.Fatalf("unexpected err: %v", err)
}
if err := write(t, primary, 1, 1); err != nil {
t.Fatalf("unexpected err: %v", err)
}
// get the primary/master XLogPos
xLogPos, err := GetXLogPos(primary)
if err != nil {
t.Fatalf("unexpected err: %v", err)
}
// wait for the keepers to have reported their state
if err := WaitClusterSyncedXLogPos([]*TestKeeper{master, standbys[0]}, xLogPos, sm, 20*time.Second); err != nil {
t.Fatalf("unexpected err: %v", err)
}
// Freeze the keeper and postgres processes on the master
t.Logf("SIGSTOPping current master keeper: %s", master.uid)
if err := master.Signal(syscall.SIGSTOP); err != nil {
t.Fatalf("unexpected err: %v", err)
}
t.Logf("SIGSTOPping current master postgres: %s", master.uid)
if err := master.SignalPG(syscall.SIGSTOP); err != nil {
t.Fatalf("unexpected err: %v", err)
}
if err := standbys[0].WaitDBRole(common.RoleMaster, ptk, 60*time.Second); err != nil {
t.Fatalf("unexpected err: %v", err)
}
c, err := getLines(t, standbys[0])
if err != nil {
t.Fatalf("unexpected err: %v", err)
}
if c != 1 {
t.Fatalf("wrong number of lines, want: %d, got: %d", 1, c)
}
// Add another standby so we'll have 2 standbys. With only 1 standby,
// when using synchronous replication, the test will block forever when
// writing to the new master since there's not active synchronous
// standby.
tk, err := NewTestKeeper(t, dir, clusterName, pgSUUsername, pgSUPassword, pgReplUsername, pgReplPassword, tstore.storeBackend, storeEndpoints)
if err != nil {
t.Fatalf("unexpected err: %v", err)
}
tks[tk.uid] = tk
if err := tk.Start(); err != nil {
t.Fatalf("unexpected err: %v", err)
}
standbys = append(standbys, tk)
// Wait replicated data to standby
if err := waitLines(t, standbys[1], 1, 30*time.Second); err != nil {
t.Fatalf("unexpected err: %v", err)
}
// the proxy should connect to the right master
if err := tp.WaitRightMaster(standbys[0], 3*cluster.DefaultProxyCheckInterval); err != nil {
t.Fatalf("unexpected err: %v", err)
}
if !standbyCluster {
primary = standbys[0]
}
if err := write(t, primary, 2, 2); err != nil {
t.Fatalf("unexpected err: %v", err)
}
// Make the master come back
t.Logf("Resuming old master keeper: %s", master.uid)
if err := master.Signal(syscall.SIGCONT); err != nil {
t.Fatalf("unexpected err: %v", err)
}
t.Logf("Resuming old master postgres: %s", master.uid)
if err := master.SignalPG(syscall.SIGCONT); err != nil {
t.Fatalf("unexpected err: %v", err)
}
// Wait replicated data to old master
if err := waitLines(t, master, 2, 60*time.Second); err != nil {
t.Fatalf("unexpected err: %v", err)
}
// Old master should become a standby of the new one
if err := master.WaitDBRole(common.RoleStandby, ptk, 60*time.Second); err != nil {
t.Fatalf("unexpected err: %v", err)
}
}
func TestPartition1(t *testing.T) {
t.Parallel()
testPartition1(t, false, false, false)
}
func TestPartition1SyncRepl(t *testing.T) {
t.Parallel()
testPartition1(t, true, false, false)
}
func TestPartition1Pgrewind(t *testing.T) {
t.Parallel()
testPartition1(t, false, true, false)
}
func TestPartition1SyncReplPgrewind(t *testing.T) {
t.Parallel()
testPartition1(t, true, true, false)
}
func TestPartition1StandbyCluster(t *testing.T) {
t.Parallel()
testPartition1(t, false, false, true)
}
func testTimelineFork(t *testing.T, syncRepl, usePgrewind bool) {
dir, err := ioutil.TempDir("", "stolon")
if err != nil {
t.Fatalf("unexpected err: %v", err)
}
defer os.RemoveAll(dir)
clusterName := uuid.NewV4().String()
tks, tss, tp, tstore := setupServers(t, clusterName, dir, 2, 1, syncRepl, usePgrewind, nil)
defer shutdown(tks, tss, tp, tstore)
storeEndpoints := fmt.Sprintf("%s:%s", tstore.listenAddress, tstore.port)
storePath := filepath.Join(common.StorePrefix, clusterName)
sm := store.NewKVBackedStore(tstore.store, storePath)
master, standbys := waitMasterStandbysReady(t, sm, tks)
if syncRepl {
if err := WaitClusterDataSynchronousStandbys([]string{standbys[0].uid}, sm, 30*time.Second); err != nil {
t.Fatalf("expected synchronous standby on keeper %q in cluster data", standbys[0].uid)
}
}
if err := populate(t, master); err != nil {
t.Fatalf("unexpected err: %v", err)
}
if err := write(t, master, 1, 1); err != nil {
t.Fatalf("unexpected err: %v", err)
}
// Wait replicated data to standby
if err := waitLines(t, standbys[0], 1, 30*time.Second); err != nil {
t.Fatalf("unexpected err: %v", err)
}
// Add another standby
tk, err := NewTestKeeper(t, dir, clusterName, pgSUUsername, pgSUPassword, pgReplUsername, pgReplPassword, tstore.storeBackend, storeEndpoints)
if err != nil {
t.Fatalf("unexpected err: %v", err)
}
tks[tk.uid] = tk
if err := tk.Start(); err != nil {
t.Fatalf("unexpected err: %v", err)
}
standbys = append(standbys, tk)