func CheckShardLock(t *testing.T, ts topo.Server) {
if err := ts.CreateKeyspace("test_keyspace", &topo.Keyspace{}); err != nil {
t.Fatalf("CreateKeyspace: %v", err)
}
if err := topo.CreateShard(ts, "test_keyspace", "10-20"); err != nil {
t.Fatalf("CreateShard: %v", err)
}
interrupted := make(chan struct{}, 1)
lockPath, err := ts.LockShardForAction("test_keyspace", "10-20", "fake-content", 5*time.Second, interrupted)
if err != nil {
t.Fatalf("LockShardForAction: %v", err)
}
// test we can't take the lock again
if _, err := ts.LockShardForAction("test_keyspace", "10-20", "unused-fake-content", time.Second/2, interrupted); err != topo.ErrTimeout {
t.Errorf("LockShardForAction(again): %v", err)
}
// test we can interrupt taking the lock
go func() {
time.Sleep(time.Second / 2)
close(interrupted)
}()
if _, err := ts.LockShardForAction("test_keyspace", "10-20", "unused-fake-content", 5*time.Second, interrupted); err != topo.ErrInterrupted {
t.Errorf("LockShardForAction(interrupted): %v", err)
}
if err := ts.UnlockShardForAction("test_keyspace", "10-20", lockPath, "fake-results"); err != nil {
t.Errorf("UnlockShardForAction(): %v", err)
}
// test we can't unlock again
if err := ts.UnlockShardForAction("test_keyspace", "10-20", lockPath, "fake-results"); err == nil {
t.Error("UnlockShardForAction(again) worked")
}
// test we can't lock a non-existing shard
interrupted = make(chan struct{}, 1)
if _, err := ts.LockShardForAction("test_keyspace", "20-30", "fake-content", 5*time.Second, interrupted); err == nil {
t.Fatalf("LockShardForAction(test_keyspace/20-30) worked for non-existing shard")
}
}
// InitTablet creates or updates a tablet. If no parent is specified
// in the tablet, and the tablet has a slave type, we will find the
// appropriate parent. If createShardAndKeyspace is true and the
// parent keyspace or shard don't exist, they will be created. If
// update is true, and a tablet with the same ID exists, update it.
// If Force is true, and a tablet with the same ID already exists, it
// will be scrapped and deleted, and then recreated.
func (wr *Wrangler) InitTablet(tablet *topo.Tablet, force, createShardAndKeyspace, update bool) error {
if err := tablet.Complete(); err != nil {
return err
}
if tablet.IsInReplicationGraph() {
// create the parent keyspace and shard if needed
if createShardAndKeyspace {
if err := wr.ts.CreateKeyspace(tablet.Keyspace, &topo.Keyspace{}); err != nil && err != topo.ErrNodeExists {
return err
}
if err := topo.CreateShard(wr.ts, tablet.Keyspace, tablet.Shard); err != nil && err != topo.ErrNodeExists {
return err
}
}
// get the shard, checks a couple things
si, err := wr.ts.GetShard(tablet.Keyspace, tablet.Shard)
if err != nil {
return fmt.Errorf("missing parent shard, use -parent option to create it, or CreateKeyspace / CreateShard")
}
if si.KeyRange != tablet.KeyRange {
return fmt.Errorf("shard %v/%v has a different KeyRange: %v != %v", tablet.Keyspace, tablet.Shard, si.KeyRange, tablet.KeyRange)
}
if tablet.Type == topo.TYPE_MASTER && !si.MasterAlias.IsZero() && si.MasterAlias != tablet.Alias && !force {
return fmt.Errorf("creating this tablet would override old master %v in shard %v/%v", si.MasterAlias, tablet.Keyspace, tablet.Shard)
}
// see if we specified a parent, otherwise get it from the shard
if tablet.Parent.IsZero() && tablet.Type.IsSlaveType() {
if si.MasterAlias.IsZero() {
return fmt.Errorf("trying to create tablet %v in shard %v/%v without a master", tablet.Alias, tablet.Keyspace, tablet.Shard)
}
tablet.Parent = si.MasterAlias
}
// update the shard record if needed
if err := wr.updateShardCellsAndMaster(si, tablet.Alias, tablet.Type, force); err != nil {
return err
}
}
err := topo.CreateTablet(wr.ts, tablet)
if err != nil && err == topo.ErrNodeExists {
// Try to update nicely, but if it fails fall back to force behavior.
if update || force {
oldTablet, err := wr.ts.GetTablet(tablet.Alias)
if err != nil {
wr.Logger().Warningf("failed reading tablet %v: %v", tablet.Alias, err)
} else {
if oldTablet.Keyspace == tablet.Keyspace && oldTablet.Shard == tablet.Shard {
*(oldTablet.Tablet) = *tablet
if err := topo.UpdateTablet(context.TODO(), wr.ts, oldTablet); err != nil {
wr.Logger().Warningf("failed updating tablet %v: %v", tablet.Alias, err)
// now fall through the Scrap case
} else {
if !tablet.IsInReplicationGraph() {
return nil
}
if err := topo.UpdateTabletReplicationData(context.TODO(), wr.ts, tablet); err != nil {
wr.Logger().Warningf("failed updating tablet replication data for %v: %v", tablet.Alias, err)
// now fall through the Scrap case
} else {
return nil
}
}
}
}
}
if force {
if err = wr.Scrap(tablet.Alias, force, false); err != nil {
wr.Logger().Errorf("failed scrapping tablet %v: %v", tablet.Alias, err)
return err
}
if err := wr.ts.DeleteTablet(tablet.Alias); err != nil {
// we ignore this
wr.Logger().Errorf("failed deleting tablet %v: %v", tablet.Alias, err)
}
return topo.CreateTablet(wr.ts, tablet)
}
}
return err
}
func CheckShard(t *testing.T, ts topo.Server) {
if err := ts.CreateKeyspace("test_keyspace", &topo.Keyspace{}); err != nil {
t.Fatalf("CreateKeyspace: %v", err)
}
if err := topo.CreateShard(ts, "test_keyspace", "b0-c0"); err != nil {
t.Fatalf("CreateShard: %v", err)
}
if err := topo.CreateShard(ts, "test_keyspace", "b0-c0"); err != topo.ErrNodeExists {
t.Errorf("CreateShard called second time, got: %v", err)
}
if _, err := ts.GetShard("test_keyspace", "666"); err != topo.ErrNoNode {
t.Errorf("GetShard(666): %v", err)
}
shardInfo, err := ts.GetShard("test_keyspace", "b0-c0")
if err != nil {
t.Errorf("GetShard: %v", err)
}
if want := newKeyRange("b0-c0"); shardInfo.KeyRange != want {
t.Errorf("shardInfo.KeyRange: want %v, got %v", want, shardInfo.KeyRange)
}
master := topo.TabletAlias{Cell: "ny", Uid: 1}
shardInfo.MasterAlias = master
shardInfo.KeyRange = newKeyRange("b0-c0")
shardInfo.ServedTypesMap = map[topo.TabletType]*topo.ShardServedType{
topo.TYPE_MASTER: &topo.ShardServedType{},
topo.TYPE_REPLICA: &topo.ShardServedType{Cells: []string{"c1"}},
topo.TYPE_RDONLY: &topo.ShardServedType{},
}
shardInfo.SourceShards = []topo.SourceShard{
topo.SourceShard{
Uid: 1,
Keyspace: "source_ks",
Shard: "b8-c0",
KeyRange: newKeyRange("b8-c0"),
Tables: []string{"table1", "table2"},
},
}
shardInfo.TabletControlMap = map[topo.TabletType]*topo.TabletControl{
topo.TYPE_MASTER: &topo.TabletControl{
Cells: []string{"c1", "c2"},
BlacklistedTables: []string{"black1", "black2"},
},
topo.TYPE_REPLICA: &topo.TabletControl{
DisableQueryService: true,
},
}
if err := topo.UpdateShard(context.TODO(), ts, shardInfo); err != nil {
t.Errorf("UpdateShard: %v", err)
}
updatedShardInfo, err := ts.GetShard("test_keyspace", "b0-c0")
if err != nil {
t.Fatalf("GetShard: %v", err)
}
if eq, err := shardEqual(shardInfo.Shard, updatedShardInfo.Shard); err != nil {
t.Errorf("cannot compare shards: %v", err)
} else if !eq {
t.Errorf("put and got shards are not identical:\n%#v\n%#v", shardInfo.Shard, updatedShardInfo.Shard)
}
// test GetShardNames
shards, err := ts.GetShardNames("test_keyspace")
if err != nil {
t.Errorf("GetShardNames: %v", err)
}
if len(shards) != 1 || shards[0] != "b0-c0" {
t.Errorf(`GetShardNames: want [ "b0-c0" ], got %v`, shards)
}
if _, err := ts.GetShardNames("test_keyspace666"); err != topo.ErrNoNode {
t.Errorf("GetShardNames(666): %v", err)
}
}
// This is a quick and dirty tool to resurrect the TopologyServer data from the
// canonical data stored in the tablet nodes.
//
// cells: local vt cells to scan for all tablets
// keyspaces: list of keyspaces to rebuild
func (wr *Wrangler) RebuildReplicationGraph(cells []string, keyspaces []string) error {
if cells == nil || len(cells) == 0 {
return fmt.Errorf("must specify cells to rebuild replication graph")
}
if keyspaces == nil || len(keyspaces) == 0 {
return fmt.Errorf("must specify keyspaces to rebuild replication graph")
}
allTablets := make([]*topo.TabletInfo, 0, 1024)
for _, cell := range cells {
tablets, err := topotools.GetAllTablets(context.TODO(), wr.ts, cell)
if err != nil {
return err
}
allTablets = append(allTablets, tablets...)
}
for _, keyspace := range keyspaces {
wr.logger.Infof("delete keyspace shards: %v", keyspace)
if err := wr.ts.DeleteKeyspaceShards(keyspace); err != nil {
return err
}
}
keyspacesToRebuild := make(map[string]bool)
shardsCreated := make(map[string]bool)
hasErr := false
mu := sync.Mutex{}
wg := sync.WaitGroup{}
for _, ti := range allTablets {
wg.Add(1)
go func(ti *topo.TabletInfo) {
defer wg.Done()
if !ti.IsInReplicationGraph() {
return
}
if !strInList(keyspaces, ti.Keyspace) {
return
}
mu.Lock()
keyspacesToRebuild[ti.Keyspace] = true
shardPath := ti.Keyspace + "/" + ti.Shard
if !shardsCreated[shardPath] {
if err := topo.CreateShard(wr.ts, ti.Keyspace, ti.Shard); err != nil && err != topo.ErrNodeExists {
wr.logger.Warningf("failed re-creating shard %v: %v", shardPath, err)
hasErr = true
} else {
shardsCreated[shardPath] = true
}
}
mu.Unlock()
err := topo.UpdateTabletReplicationData(context.TODO(), wr.ts, ti.Tablet)
if err != nil {
mu.Lock()
hasErr = true
mu.Unlock()
wr.logger.Warningf("failed updating replication data: %v", err)
}
}(ti)
}
wg.Wait()
for keyspace := range keyspacesToRebuild {
wg.Add(1)
go func(keyspace string) {
defer wg.Done()
if err := wr.RebuildKeyspaceGraph(keyspace, nil); err != nil {
mu.Lock()
hasErr = true
mu.Unlock()
wr.logger.Warningf("RebuildKeyspaceGraph(%v) failed: %v", keyspace, err)
return
}
}(keyspace)
}
wg.Wait()
if hasErr {
return fmt.Errorf("some errors occurred rebuilding replication graph, consult log")
}
return nil
}
// CopyShards will create the shards in the destination topo
func CopyShards(fromTS, toTS topo.Server, deleteKeyspaceShards bool) {
keyspaces, err := fromTS.GetKeyspaces()
if err != nil {
log.Fatalf("fromTS.GetKeyspaces: %v", err)
}
wg := sync.WaitGroup{}
rec := concurrency.AllErrorRecorder{}
for _, keyspace := range keyspaces {
wg.Add(1)
go func(keyspace string) {
defer wg.Done()
shards, err := fromTS.GetShardNames(keyspace)
if err != nil {
rec.RecordError(fmt.Errorf("GetShardNames(%v): %v", keyspace, err))
return
}
if deleteKeyspaceShards {
if err := toTS.DeleteKeyspaceShards(keyspace); err != nil {
rec.RecordError(fmt.Errorf("DeleteKeyspaceShards(%v): %v", keyspace, err))
return
}
}
for _, shard := range shards {
wg.Add(1)
go func(keyspace, shard string) {
defer wg.Done()
if err := topo.CreateShard(toTS, keyspace, shard); err != nil {
if err == topo.ErrNodeExists {
log.Warningf("shard %v/%v already exists", keyspace, shard)
} else {
rec.RecordError(fmt.Errorf("CreateShard(%v, %v): %v", keyspace, shard, err))
return
}
}
si, err := fromTS.GetShard(keyspace, shard)
if err != nil {
rec.RecordError(fmt.Errorf("GetShard(%v, %v): %v", keyspace, shard, err))
return
}
toSi, err := toTS.GetShard(keyspace, shard)
if err != nil {
rec.RecordError(fmt.Errorf("toTS.GetShard(%v, %v): %v", keyspace, shard, err))
return
}
if _, err := toTS.UpdateShard(si, toSi.Version()); err != nil {
rec.RecordError(fmt.Errorf("UpdateShard(%v, %v): %v", keyspace, shard, err))
}
}(keyspace, shard)
}
}(keyspace)
}
wg.Wait()
if rec.HasErrors() {
log.Fatalf("copyShards failed: %v", rec.Error())
}
}
func testSplitClone(t *testing.T, strategy string) {
ts := zktopo.NewTestServer(t, []string{"cell1", "cell2"})
wr := wrangler.New(logutil.NewConsoleLogger(), ts, time.Minute, time.Second)
sourceMaster := testlib.NewFakeTablet(t, wr, "cell1", 0,
topo.TYPE_MASTER, testlib.TabletKeyspaceShard(t, "ks", "-80"))
sourceRdonly1 := testlib.NewFakeTablet(t, wr, "cell1", 1,
topo.TYPE_RDONLY, testlib.TabletKeyspaceShard(t, "ks", "-80"),
testlib.TabletParent(sourceMaster.Tablet.Alias))
sourceRdonly2 := testlib.NewFakeTablet(t, wr, "cell1", 2,
topo.TYPE_RDONLY, testlib.TabletKeyspaceShard(t, "ks", "-80"),
testlib.TabletParent(sourceMaster.Tablet.Alias))
leftMaster := testlib.NewFakeTablet(t, wr, "cell1", 10,
topo.TYPE_MASTER, testlib.TabletKeyspaceShard(t, "ks", "-40"))
leftRdonly := testlib.NewFakeTablet(t, wr, "cell1", 11,
topo.TYPE_RDONLY, testlib.TabletKeyspaceShard(t, "ks", "-40"),
testlib.TabletParent(leftMaster.Tablet.Alias))
rightMaster := testlib.NewFakeTablet(t, wr, "cell1", 20,
topo.TYPE_MASTER, testlib.TabletKeyspaceShard(t, "ks", "40-80"))
rightRdonly := testlib.NewFakeTablet(t, wr, "cell1", 21,
topo.TYPE_RDONLY, testlib.TabletKeyspaceShard(t, "ks", "40-80"),
testlib.TabletParent(rightMaster.Tablet.Alias))
for _, ft := range []*testlib.FakeTablet{sourceMaster, sourceRdonly1, sourceRdonly2, leftMaster, leftRdonly, rightMaster, rightRdonly} {
ft.StartActionLoop(t, wr)
defer ft.StopActionLoop(t)
}
// add the topo and schema data we'll need
if err := topo.CreateShard(ts, "ks", "80-"); err != nil {
t.Fatalf("CreateShard(\"-80\") failed: %v", err)
}
if err := wr.SetKeyspaceShardingInfo("ks", "keyspace_id", key.KIT_UINT64, 4, false); err != nil {
t.Fatalf("SetKeyspaceShardingInfo failed: %v", err)
}
if err := wr.RebuildKeyspaceGraph("ks", nil); err != nil {
t.Fatalf("RebuildKeyspaceGraph failed: %v", err)
}
gwrk, err := NewSplitCloneWorker(wr, "cell1", "ks", "-80", nil, strategy, 10 /*sourceReaderCount*/, 4 /*destinationPackCount*/, 1 /*minTableSizeForSplit*/, 10 /*destinationWriterCount*/)
if err != nil {
t.Errorf("Worker creation failed: %v", err)
}
wrk := gwrk.(*SplitCloneWorker)
for _, sourceRdonly := range []*testlib.FakeTablet{sourceRdonly1, sourceRdonly2} {
sourceRdonly.FakeMysqlDaemon.Schema = &myproto.SchemaDefinition{
DatabaseSchema: "",
TableDefinitions: []*myproto.TableDefinition{
&myproto.TableDefinition{
Name: "table1",
Columns: []string{"id", "msg", "keyspace_id"},
PrimaryKeyColumns: []string{"id"},
Type: myproto.TABLE_BASE_TABLE,
// This informs how many rows we can pack into a single insert
DataLength: 2048,
},
},
}
sourceRdonly.FakeMysqlDaemon.DbaConnectionFactory = SourceRdonlyFactory(t)
sourceRdonly.FakeMysqlDaemon.CurrentSlaveStatus = &myproto.ReplicationStatus{
Position: myproto.ReplicationPosition{
GTIDSet: myproto.MariadbGTID{Domain: 12, Server: 34, Sequence: 5678},
},
}
sourceRdonly.RpcServer.Register(&SqlQuery{t: t})
}
// We read 100 source rows. sourceReaderCount is set to 10, so
// we'll have 100/10=10 rows per table chunk.
// destinationPackCount is set to 4, so we take 4 source rows
// at once. So we'll process 4 + 4 + 2 rows to get to 10.
// That means 3 insert statements on each target (each
// containing half of the rows, i.e. 2 + 2 + 1 rows). So 3 * 10
// = 30 insert statements on each destination.
leftMaster.FakeMysqlDaemon.DbaConnectionFactory = DestinationsFactory(t, 30)
leftRdonly.FakeMysqlDaemon.DbaConnectionFactory = DestinationsFactory(t, 30)
rightMaster.FakeMysqlDaemon.DbaConnectionFactory = DestinationsFactory(t, 30)
rightRdonly.FakeMysqlDaemon.DbaConnectionFactory = DestinationsFactory(t, 30)
wrk.Run()
status := wrk.StatusAsText()
t.Logf("Got status: %v", status)
if wrk.err != nil || wrk.state != stateSCDone {
t.Errorf("Worker run failed")
}
}