func (agent *ActionAgent) allowQueries(tablet *topo.Tablet) error {
if agent.DBConfigs == nil {
// test instance, do nothing
return nil
}
// if the query service is already running, we're not starting it again
if tabletserver.SqlQueryRpcService.GetState() == "SERVING" {
return nil
}
// Update our DB config to match the info we have in the tablet
if agent.DBConfigs.App.DbName == "" {
agent.DBConfigs.App.DbName = tablet.DbName()
}
agent.DBConfigs.App.Keyspace = tablet.Keyspace
agent.DBConfigs.App.Shard = tablet.Shard
qrs, err := agent.createQueryRules(tablet)
if err != nil {
return err
}
return tabletserver.AllowQueries(&agent.DBConfigs.App, agent.SchemaOverrides, qrs, agent.Mysqld, false)
}
func main() {
flag.Parse()
servenv.Init()
defer servenv.Close()
unmarshalFile(*dbConfigFile, &dbconfig)
log.Infof("dbconfig: %s\n", dbconfig)
unmarshalFile(*overridesFile, &schemaOverrides)
data, _ := json.MarshalIndent(schemaOverrides, "", " ")
log.Infof("schemaOverrides: %s\n", data)
ts.InitQueryService()
ts.AllowQueries(dbconfig, schemaOverrides, ts.LoadCustomRules())
servenv.ServeRPC()
log.Infof("starting vtocc %v", *port)
s := proc.ListenAndServe(fmt.Sprintf("%v", *port))
// A SIGUSR1 means that we're restarting
if s == syscall.SIGUSR1 {
// Give some time for the other process
// to pick up the listeners
time.Sleep(5 * time.Millisecond)
ts.DisallowQueries(true)
} else {
ts.DisallowQueries(false)
}
}
func main() {
dbconfigs.RegisterFlags()
flag.Parse()
servenv.Init()
dbConfigs, err := dbconfigs.Init("")
if err != nil {
log.Fatalf("Cannot initialize App dbconfig: %v", err)
}
if *enableRowcache {
dbConfigs.App.EnableRowcache = true
if *enableInvalidator {
dbConfigs.App.EnableInvalidator = true
}
}
mycnf := &mysqlctl.Mycnf{BinLogPath: *binlogPath}
mysqld := mysqlctl.NewMysqld(mycnf, &dbConfigs.Dba, &dbConfigs.Repl)
unmarshalFile(*overridesFile, &schemaOverrides)
data, _ := json.MarshalIndent(schemaOverrides, "", " ")
log.Infof("schemaOverrides: %s\n", data)
ts.InitQueryService()
ts.AllowQueries(&dbConfigs.App, schemaOverrides, ts.LoadCustomRules(), mysqld)
log.Infof("starting vtocc %v", *servenv.Port)
servenv.OnClose(func() {
time.Sleep(5 * time.Millisecond)
ts.DisallowQueries()
})
servenv.Run()
}
func main() {
defaultDBConfig := dbconfigs.DefaultDBConfigs.App
defaultDBConfig.Host = "localhost"
dbconfigs.RegisterAppFlags(defaultDBConfig)
flag.Parse()
servenv.Init()
dbConfig, err := dbconfigs.InitApp("")
if err != nil {
log.Fatalf("Cannot initialize App dbconfig: %v", err)
}
unmarshalFile(*overridesFile, &schemaOverrides)
data, _ := json.MarshalIndent(schemaOverrides, "", " ")
log.Infof("schemaOverrides: %s\n", data)
ts.InitQueryService()
ts.AllowQueries(dbConfig, schemaOverrides, ts.LoadCustomRules())
log.Infof("starting vtocc %v", *port)
servenv.OnClose(func() {
time.Sleep(5 * time.Millisecond)
ts.DisallowQueries()
})
servenv.Run(*port)
}
func (agent *ActionAgent) allowQueries(tablet *topo.Tablet) error {
// if the query service is already running, we're not starting it again
if tabletserver.SqlQueryRpcService.GetState() == "SERVING" {
return nil
}
// Update our DB config to match the info we have in the tablet
if agent.DBConfigs.App.DbName == "" {
agent.DBConfigs.App.DbName = tablet.DbName()
}
agent.DBConfigs.App.Keyspace = tablet.Keyspace
agent.DBConfigs.App.Shard = tablet.Shard
if tablet.Type != topo.TYPE_MASTER {
agent.DBConfigs.App.EnableInvalidator = true
} else {
agent.DBConfigs.App.EnableInvalidator = false
}
// Compute the query rules that match the tablet record
qrs := tabletserver.LoadCustomRules()
if tablet.KeyRange.IsPartial() {
qr := tabletserver.NewQueryRule("enforce keyspace_id range", "keyspace_id_not_in_range", tabletserver.QR_FAIL)
qr.AddPlanCond(planbuilder.PLAN_INSERT_PK)
err := qr.AddBindVarCond("keyspace_id", true, true, tabletserver.QR_NOTIN, tablet.KeyRange)
if err != nil {
log.Warningf("Unable to add keyspace rule: %v", err)
} else {
qrs.Add(qr)
}
}
if len(tablet.BlacklistedTables) > 0 {
// tables, first resolve wildcards
tables, err := agent.Mysqld.ResolveTables(tablet.DbName(), tablet.BlacklistedTables)
if err != nil {
log.Warningf("Unable to resolve blacklisted tables: %v", err)
} else {
log.Infof("Blacklisting tables %v", strings.Join(tables, ", "))
qr := tabletserver.NewQueryRule("enforce blacklisted tables", "blacklisted_table", tabletserver.QR_FAIL_RETRY)
for _, t := range tables {
qr.AddTableCond(t)
}
qrs.Add(qr)
}
}
return tabletserver.AllowQueries(&agent.DBConfigs.App, agent.SchemaOverrides, qrs, agent.Mysqld, false)
}
func main() {
dbconfigs.RegisterFlags()
flag.Parse()
if len(flag.Args()) > 0 {
flag.Usage()
log.Fatalf("vtocc doesn't take any positional arguments")
}
servenv.Init()
dbConfigs, err := dbconfigs.Init("")
if err != nil {
log.Fatalf("Cannot initialize App dbconfig: %v", err)
}
if *enableRowcache {
dbConfigs.App.EnableRowcache = true
if *enableInvalidator {
dbConfigs.App.EnableInvalidator = true
}
}
mycnf := &mysqlctl.Mycnf{BinLogPath: *binlogPath}
mysqld := mysqlctl.NewMysqld("Dba", mycnf, &dbConfigs.Dba, &dbConfigs.Repl)
unmarshalFile(*overridesFile, &schemaOverrides)
data, _ := json.MarshalIndent(schemaOverrides, "", " ")
log.Infof("schemaOverrides: %s\n", data)
if *tableAclConfig != "" {
tableacl.Init(*tableAclConfig)
}
tabletserver.InitQueryService()
err = tabletserver.AllowQueries(&dbConfigs.App, schemaOverrides, tabletserver.LoadCustomRules(), mysqld, true)
if err != nil {
return
}
log.Infof("starting vtocc %v", *servenv.Port)
servenv.OnTerm(func() {
tabletserver.DisallowQueries()
mysqld.Close()
})
servenv.RunDefault()
}
func main() {
dbCredentialsFile := dbconfigs.RegisterAppFlags(DefaultDBConfig)
flag.Parse()
servenv.Init()
dbConfigs, _ := dbconfigs.Init("", *dbCredentialsFile)
unmarshalFile(*overridesFile, &schemaOverrides)
data, _ := json.MarshalIndent(schemaOverrides, "", " ")
log.Infof("schemaOverrides: %s\n", data)
ts.InitQueryService()
ts.AllowQueries(dbConfigs.App, schemaOverrides, ts.LoadCustomRules())
log.Infof("starting vtocc %v", *port)
servenv.OnClose(func() {
time.Sleep(5 * time.Millisecond)
ts.DisallowQueries()
})
servenv.Run(*port)
}
// InitAgent initializes the agent within vttablet.
func InitAgent(
tabletAlias topo.TabletAlias,
dbcfgs dbconfigs.DBConfigs,
mycnf *mysqlctl.Mycnf,
dbConfigsFile, dbCredentialsFile string,
port, securePort int,
mycnfFile, overridesFile string) (err error) {
schemaOverrides := loadSchemaOverrides(overridesFile)
topoServer := topo.GetServer()
// Start the binlog server service, disabled at start.
binlogServer = mysqlctl.NewBinlogServer(mycnf)
mysqlctl.RegisterBinlogServerService(binlogServer)
// Start the binlog player services, not playing at start.
binlogPlayerMap = NewBinlogPlayerMap(topoServer, &dbcfgs.Dba)
RegisterBinlogPlayerMap(binlogPlayerMap)
// Compute the bind addresses
bindAddr := fmt.Sprintf(":%v", port)
secureAddr := ""
if securePort != 0 {
secureAddr = fmt.Sprintf(":%v", securePort)
}
exportedType := expvar.NewString("tablet-type")
// Action agent listens to changes in zookeeper and makes
// modifications to this tablet.
agent, err = tm.NewActionAgent(topoServer, tabletAlias, mycnfFile, dbConfigsFile, dbCredentialsFile)
if err != nil {
return err
}
agent.AddChangeCallback(func(oldTablet, newTablet topo.Tablet) {
if newTablet.IsServingType() {
if dbcfgs.App.Dbname == "" {
dbcfgs.App.Dbname = newTablet.DbName()
}
dbcfgs.App.KeyRange = newTablet.KeyRange
dbcfgs.App.Keyspace = newTablet.Keyspace
dbcfgs.App.Shard = newTablet.Shard
// Transitioning from replica to master, first disconnect
// existing connections. "false" indicateds that clients must
// re-resolve their endpoint before reconnecting.
if newTablet.Type == topo.TYPE_MASTER && oldTablet.Type != topo.TYPE_MASTER {
ts.DisallowQueries(false)
}
qrs := ts.LoadCustomRules()
if dbcfgs.App.KeyRange.IsPartial() {
qr := ts.NewQueryRule("enforce keyspace_id range", "keyspace_id_not_in_range", ts.QR_FAIL_QUERY)
qr.AddPlanCond(sqlparser.PLAN_INSERT_PK)
err = qr.AddBindVarCond("keyspace_id", true, true, ts.QR_NOTIN, dbcfgs.App.KeyRange)
if err != nil {
log.Warningf("Unable to add keyspace rule: %v", err)
} else {
qrs.Add(qr)
}
}
ts.AllowQueries(dbcfgs.App, schemaOverrides, qrs)
mysqlctl.EnableUpdateStreamService(string(newTablet.Type), dbcfgs)
if newTablet.Type != topo.TYPE_MASTER {
ts.StartRowCacheInvalidation()
}
} else {
ts.DisallowQueries(false)
ts.StopRowCacheInvalidation()
mysqlctl.DisableUpdateStreamService()
}
exportedType.Set(string(newTablet.Type))
// BinlogServer is only enabled for replicas
if newTablet.Type == topo.TYPE_REPLICA {
if !mysqlctl.IsBinlogServerEnabled(binlogServer) {
mysqlctl.EnableBinlogServerService(binlogServer, dbcfgs.App.Dbname)
}
} else {
if mysqlctl.IsBinlogServerEnabled(binlogServer) {
mysqlctl.DisableBinlogServerService(binlogServer)
}
}
// See if we need to start or stop any binlog player
if newTablet.Type == topo.TYPE_MASTER {
binlogPlayerMap.RefreshMap(newTablet)
} else {
binlogPlayerMap.StopAllPlayers()
}
})
mysqld := mysqlctl.NewMysqld(mycnf, dbcfgs.Dba, dbcfgs.Repl)
if err := agent.Start(bindAddr, secureAddr, mysqld.Addr()); err != nil {
return err
}
// register the RPC services from the agent
agent.RegisterQueryService(mysqld)
return nil
}
// InitAgent initializes the agent within vttablet.
func InitAgent(
tabletAlias topo.TabletAlias,
dbcfgs *dbconfigs.DBConfigs,
mycnf *mysqlctl.Mycnf,
port, securePort int,
overridesFile string,
) (agent *tabletmanager.ActionAgent, err error) {
schemaOverrides := loadSchemaOverrides(overridesFile)
topoServer := topo.GetServer()
mysqld := mysqlctl.NewMysqld(mycnf, &dbcfgs.Dba, &dbcfgs.Repl)
statsType := stats.NewString("TabletType")
statsKeyspace := stats.NewString("TabletKeyspace")
statsShard := stats.NewString("TabletShard")
statsKeyRangeStart := stats.NewString("TabletKeyRangeStart")
statsKeyRangeEnd := stats.NewString("TabletKeyRangeEnd")
agent, err = tabletmanager.NewActionAgent(topoServer, tabletAlias, mysqld)
if err != nil {
return nil, err
}
// Start the binlog player services, not playing at start.
agent.BinlogPlayerMap = tabletmanager.NewBinlogPlayerMap(topoServer, &dbcfgs.App.ConnectionParams, mysqld)
tabletmanager.RegisterBinlogPlayerMap(agent.BinlogPlayerMap)
// Action agent listens to changes in zookeeper and makes
// modifications to this tablet.
agent.AddChangeCallback(func(oldTablet, newTablet topo.Tablet) {
allowQuery := true
var shardInfo *topo.ShardInfo
var keyspaceInfo *topo.KeyspaceInfo
if newTablet.Type == topo.TYPE_MASTER {
// read the shard to get SourceShards
shardInfo, err = topoServer.GetShard(newTablet.Keyspace, newTablet.Shard)
if err != nil {
log.Errorf("Cannot read shard for this tablet %v: %v", newTablet.Alias, err)
} else {
allowQuery = len(shardInfo.SourceShards) == 0
}
// read the keyspace to get ShardingColumnType
keyspaceInfo, err = topoServer.GetKeyspace(newTablet.Keyspace)
switch err {
case nil:
// continue
case topo.ErrNoNode:
// backward compatible mode
keyspaceInfo = topo.NewKeyspaceInfo(newTablet.Keyspace, &topo.Keyspace{})
default:
log.Errorf("Cannot read keyspace for this tablet %v: %v", newTablet.Alias, err)
keyspaceInfo = nil
}
}
if newTablet.IsRunningQueryService() && allowQuery {
if dbcfgs.App.DbName == "" {
dbcfgs.App.DbName = newTablet.DbName()
}
dbcfgs.App.Keyspace = newTablet.Keyspace
dbcfgs.App.Shard = newTablet.Shard
if newTablet.Type != topo.TYPE_MASTER {
dbcfgs.App.EnableInvalidator = true
} else {
dbcfgs.App.EnableInvalidator = false
}
// Transitioning from replica to master, first disconnect
// existing connections. "false" indicateds that clients must
// re-resolve their endpoint before reconnecting.
if newTablet.Type == topo.TYPE_MASTER && oldTablet.Type != topo.TYPE_MASTER {
ts.DisallowQueries()
}
qrs := ts.LoadCustomRules()
if newTablet.KeyRange.IsPartial() {
qr := ts.NewQueryRule("enforce keyspace_id range", "keyspace_id_not_in_range", ts.QR_FAIL_QUERY)
qr.AddPlanCond(sqlparser.PLAN_INSERT_PK)
err = qr.AddBindVarCond("keyspace_id", true, true, ts.QR_NOTIN, newTablet.KeyRange)
if err != nil {
log.Warningf("Unable to add keyspace rule: %v", err)
} else {
qrs.Add(qr)
}
}
ts.AllowQueries(&dbcfgs.App, schemaOverrides, qrs, mysqld)
// Disable before enabling to force existing streams to stop.
binlog.DisableUpdateStreamService()
binlog.EnableUpdateStreamService(dbcfgs)
} else {
ts.DisallowQueries()
binlog.DisableUpdateStreamService()
}
statsType.Set(string(newTablet.Type))
statsKeyspace.Set(newTablet.Keyspace)
statsShard.Set(newTablet.Shard)
statsKeyRangeStart.Set(string(newTablet.KeyRange.Start.Hex()))
statsKeyRangeEnd.Set(string(newTablet.KeyRange.End.Hex()))
// See if we need to start or stop any binlog player
if newTablet.Type == topo.TYPE_MASTER {
agent.BinlogPlayerMap.RefreshMap(newTablet, keyspaceInfo, shardInfo)
} else {
agent.BinlogPlayerMap.StopAllPlayersAndReset()
}
})
if err := agent.Start(mysqld.Port(), port, securePort); err != nil {
return nil, err
}
// register the RPC services from the agent
agent.RegisterQueryService()
return agent, nil
}
func main() {
flag.Parse()
if err := servenv.Init("vtocc"); err != nil {
relog.Fatal("Error in servenv.Init: %v", err)
}
if *queryLog != "" {
if f, err := os.OpenFile(*queryLog, os.O_WRONLY|os.O_APPEND|os.O_CREATE, 0644); err == nil {
ts.QueryLogger = relog.New(f, "", relog.DEBUG)
} else {
relog.Fatal("Error opening file %v: %v", *queryLog, err)
}
}
ts.SqlQueryLogger.ServeLogs("/debug/querylog")
ts.TxLogger.ServeLogs("/debug/txlog")
unmarshalFile(*configFile, &config)
data, _ := json.MarshalIndent(config, "", " ")
relog.Info("config: %s\n", data)
unmarshalFile(*dbConfigFile, &dbconfig)
relog.Info("dbconfig: %s\n", dbconfig)
unmarshalFile(*overridesFile, &schemaOverrides)
data, _ = json.MarshalIndent(schemaOverrides, "", " ")
relog.Info("schemaOverrides: %s\n", data)
ts.RegisterQueryService(config)
qrs := loadCustomRules()
ts.AllowQueries(dbconfig, schemaOverrides, qrs)
rpc.HandleHTTP()
// NOTE(szopa): Changing credentials requires a server
// restart.
if *authConfig != "" {
if err := auth.LoadCredentials(*authConfig); err != nil {
relog.Error("could not load authentication credentials, not starting rpc servers: %v", err)
}
serveAuthRPC()
}
serveRPC()
relog.Info("started vtocc %v", *port)
// we delegate out startup to the micromanagement server so these actions
// will occur after we have obtained our socket.
usefulLameDuckPeriod := float64(config.QueryTimeout + 1)
if usefulLameDuckPeriod > *lameDuckPeriod {
*lameDuckPeriod = usefulLameDuckPeriod
relog.Info("readjusted -lame-duck-period to %f", *lameDuckPeriod)
}
umgmt.SetLameDuckPeriod(float32(*lameDuckPeriod))
umgmt.SetRebindDelay(float32(*rebindDelay))
umgmt.AddStartupCallback(func() {
umgmt.StartHttpServer(fmt.Sprintf(":%v", *port))
})
umgmt.AddStartupCallback(func() {
c := make(chan os.Signal, 1)
signal.Notify(c, syscall.SIGTERM)
go func() {
for sig := range c {
umgmt.SigTermHandler(sig)
}
}()
})
umgmt.AddCloseCallback(func() {
ts.DisallowQueries(true)
})
umgmtSocket := fmt.Sprintf("/tmp/vtocc-%08x-umgmt.sock", *port)
if umgmtErr := umgmt.ListenAndServe(umgmtSocket); umgmtErr != nil {
relog.Error("umgmt.ListenAndServe err: %v", umgmtErr)
}
relog.Info("done")
}
func initAgent(tabletAlias topo.TabletAlias, dbcfgs dbconfigs.DBConfigs, mycnf *mysqlctl.Mycnf, dbConfigsFile, dbCredentialsFile string) error {
topoServer := topo.GetServer()
umgmt.AddCloseCallback(func() {
topo.CloseServers()
})
bindAddr := fmt.Sprintf(":%v", *port)
secureAddr := ""
if *securePort != 0 {
secureAddr = fmt.Sprintf(":%v", *securePort)
}
// Action agent listens to changes in zookeeper and makes
// modifications to this tablet.
agent, err := tm.NewActionAgent(topoServer, tabletAlias, *mycnfFile, dbConfigsFile, dbCredentialsFile)
if err != nil {
return err
}
agent.AddChangeCallback(func(oldTablet, newTablet topo.Tablet) {
if newTablet.IsServingType() {
if dbcfgs.App.Dbname == "" {
dbcfgs.App.Dbname = newTablet.DbName()
}
dbcfgs.App.KeyRange = newTablet.KeyRange
dbcfgs.App.Keyspace = newTablet.Keyspace
dbcfgs.App.Shard = newTablet.Shard
// Transitioning from replica to master, first disconnect
// existing connections. "false" indicateds that clients must
// re-resolve their endpoint before reconnecting.
if newTablet.Type == topo.TYPE_MASTER && oldTablet.Type != topo.TYPE_MASTER {
ts.DisallowQueries(false)
}
qrs := loadCustomRules()
if dbcfgs.App.KeyRange.IsPartial() {
qr := ts.NewQueryRule("enforce keyspace_id range", "keyspace_id_not_in_range", ts.QR_FAIL_QUERY)
qr.AddPlanCond(sqlparser.PLAN_INSERT_PK)
err = qr.AddBindVarCond("keyspace_id", true, true, ts.QR_NOTIN, dbcfgs.App.KeyRange)
if err != nil {
relog.Warning("Unable to add keyspace rule: %v", err)
} else {
qrs.Add(qr)
}
}
ts.AllowQueries(dbcfgs.App, schemaOverrides, qrs)
mysqlctl.EnableUpdateStreamService(string(newTablet.Type), dbcfgs)
if newTablet.Type != topo.TYPE_MASTER {
ts.StartRowCacheInvalidation()
}
} else {
ts.DisallowQueries(false)
mysqlctl.DisableUpdateStreamService()
if newTablet.Type != topo.TYPE_MASTER {
ts.StopRowCacheInvalidation()
}
}
})
mysqld := mysqlctl.NewMysqld(mycnf, dbcfgs.Dba, dbcfgs.Repl)
if err := agent.Start(bindAddr, secureAddr, mysqld.Addr()); err != nil {
return err
}
umgmt.AddCloseCallback(func() {
agent.Stop()
})
// register the RPC services from the agent
agent.RegisterQueryService(mysqld)
return nil
}
// InitAgent initializes the agent within vttablet.
func InitAgent(
tabletAlias topo.TabletAlias,
dbcfgs *dbconfigs.DBConfigs,
mycnf *mysqlctl.Mycnf,
port, securePort int,
overridesFile string,
) (agent *tabletmanager.ActionAgent, err error) {
schemaOverrides := loadSchemaOverrides(overridesFile)
topoServer := topo.GetServer()
mysqld := mysqlctl.NewMysqld(mycnf, &dbcfgs.Dba, &dbcfgs.Repl)
statsType := stats.NewString("TabletType")
statsKeyspace := stats.NewString("TabletKeyspace")
statsShard := stats.NewString("TabletShard")
statsKeyRangeStart := stats.NewString("TabletKeyRangeStart")
statsKeyRangeEnd := stats.NewString("TabletKeyRangeEnd")
agent, err = tabletmanager.NewActionAgent(topoServer, tabletAlias, mysqld)
if err != nil {
return nil, err
}
// Start the binlog player services, not playing at start.
agent.BinlogPlayerMap = tabletmanager.NewBinlogPlayerMap(topoServer, &dbcfgs.App.ConnectionParams, mysqld)
tabletmanager.RegisterBinlogPlayerMap(agent.BinlogPlayerMap)
// Action agent listens to changes in zookeeper and makes
// modifications to this tablet.
agent.AddChangeCallback(func(oldTablet, newTablet topo.Tablet) {
allowQuery := true
var shardInfo *topo.ShardInfo
var keyspaceInfo *topo.KeyspaceInfo
if newTablet.Type == topo.TYPE_MASTER {
// read the shard to get SourceShards
shardInfo, err = topoServer.GetShard(newTablet.Keyspace, newTablet.Shard)
if err != nil {
log.Errorf("Cannot read shard for this tablet %v: %v", newTablet.Alias, err)
} else {
allowQuery = len(shardInfo.SourceShards) == 0
}
// read the keyspace to get ShardingColumnType
keyspaceInfo, err = topoServer.GetKeyspace(newTablet.Keyspace)
switch err {
case nil:
// continue
case topo.ErrNoNode:
// backward compatible mode
keyspaceInfo = topo.NewKeyspaceInfo(newTablet.Keyspace, &topo.Keyspace{})
default:
log.Errorf("Cannot read keyspace for this tablet %v: %v", newTablet.Alias, err)
keyspaceInfo = nil
}
}
if newTablet.IsRunningQueryService() && allowQuery {
if dbcfgs.App.DbName == "" {
dbcfgs.App.DbName = newTablet.DbName()
}
dbcfgs.App.Keyspace = newTablet.Keyspace
dbcfgs.App.Shard = newTablet.Shard
if newTablet.Type != topo.TYPE_MASTER {
dbcfgs.App.EnableInvalidator = true
} else {
dbcfgs.App.EnableInvalidator = false
}
// There are a few transitions when we're
// going to need to restart the query service:
// - transitioning from replica to master, so clients
// that were already connected don't keep on using
// the master as replica or rdonly.
// - having different parameters for the query
// service. It needs to stop and restart with the
// new parameters. That includes:
// - changing KeyRange
// - changing the BlacklistedTables list
if (newTablet.Type == topo.TYPE_MASTER &&
oldTablet.Type != topo.TYPE_MASTER) ||
(newTablet.KeyRange != oldTablet.KeyRange) ||
!reflect.DeepEqual(newTablet.BlacklistedTables, oldTablet.BlacklistedTables) {
ts.DisallowQueries()
}
qrs := ts.LoadCustomRules()
if newTablet.KeyRange.IsPartial() {
qr := ts.NewQueryRule("enforce keyspace_id range", "keyspace_id_not_in_range", ts.QR_FAIL_QUERY)
qr.AddPlanCond(sqlparser.PLAN_INSERT_PK)
err = qr.AddBindVarCond("keyspace_id", true, true, ts.QR_NOTIN, newTablet.KeyRange)
if err != nil {
log.Warningf("Unable to add keyspace rule: %v", err)
} else {
qrs.Add(qr)
}
}
if len(newTablet.BlacklistedTables) > 0 {
log.Infof("Blacklisting tables %v", strings.Join(newTablet.BlacklistedTables, ", "))
qr := ts.NewQueryRule("enforce blacklisted tables", "blacklisted_table", ts.QR_FAIL_QUERY)
for _, t := range newTablet.BlacklistedTables {
qr.AddTableCond(t)
}
qrs.Add(qr)
}
ts.AllowQueries(&dbcfgs.App, schemaOverrides, qrs, mysqld)
// Disable before enabling to force existing streams to stop.
binlog.DisableUpdateStreamService()
binlog.EnableUpdateStreamService(dbcfgs)
} else {
ts.DisallowQueries()
binlog.DisableUpdateStreamService()
}
statsType.Set(string(newTablet.Type))
statsKeyspace.Set(newTablet.Keyspace)
statsShard.Set(newTablet.Shard)
statsKeyRangeStart.Set(string(newTablet.KeyRange.Start.Hex()))
statsKeyRangeEnd.Set(string(newTablet.KeyRange.End.Hex()))
// See if we need to start or stop any binlog player
if newTablet.Type == topo.TYPE_MASTER {
agent.BinlogPlayerMap.RefreshMap(newTablet, keyspaceInfo, shardInfo)
} else {
agent.BinlogPlayerMap.StopAllPlayersAndReset()
}
})
if err := agent.Start(mysqld.Port(), port, securePort); err != nil {
return nil, err
}
// register the RPC services from the agent
agent.RegisterQueryService()
// start health check if needed
initHeathCheck(agent)
return agent, nil
}