コード例 #1
0
func main() {
	dbConfigsFile, dbCredentialsFile := dbconfigs.RegisterCommonFlags()
	flag.Parse()
	servenv.Init()

	if *mycnfFile == "" {
		log.Fatalf("Please specify the path for mycnf file.")
	}
	mycnf, err := mysqlctl.ReadMycnf(*mycnfFile)
	if err != nil {
		log.Fatalf("Error reading mycnf file %v", *mycnfFile)
	}
	dbcfgs, err := dbconfigs.Init(mycnf.SocketFile, *dbConfigsFile, *dbCredentialsFile)
	if err != nil {
		log.Warning(err)
	}
	mysqld := mysqlctl.NewMysqld(mycnf, dbcfgs.Dba, dbcfgs.Repl)

	binlogServer := mysqlctl.NewBinlogServer(mysqld)
	mysqlctl.EnableBinlogServerService(binlogServer, *dbname)

	proto.RegisterBinlogServer(binlogServer)
	rpcwrap.RegisterAuthenticated(binlogServer)
	servenv.OnClose(func() {
		mysqlctl.DisableBinlogServerService(binlogServer)
	})
	servenv.Run(*port)
}
コード例 #2
0
ファイル: agent.go プロジェクト: johnvilsack/golang-stuff
func CloseAgent() {
	if agent != nil {
		agent.Stop()
	}
	if binlogServer != nil {
		mysqlctl.DisableBinlogServerService(binlogServer)
	}
	if binlogPlayerMap != nil {
		binlogPlayerMap.StopAllPlayers()
	}
}
コード例 #3
0
func main() {
	flag.Parse()
	servenv.Init()
	defer servenv.Close()

	if *mycnfFile == "" {
		log.Fatalf("Please specify the path for mycnf file.")
	}
	mycnf, err := mysqlctl.ReadMycnf(*mycnfFile)
	if err != nil {
		log.Fatalf("Error reading mycnf file %v", *mycnfFile)
	}

	binlogServer := mysqlctl.NewBinlogServer(mycnf)
	mysqlctl.EnableBinlogServerService(binlogServer, *dbname)

	proto.RegisterBinlogServer(binlogServer)
	rpcwrap.RegisterAuthenticated(binlogServer)

	servenv.ServeRPC()

	proc.ListenAndServe(fmt.Sprintf("%v", *port))
	mysqlctl.DisableBinlogServerService(binlogServer)
}
コード例 #4
0
ファイル: agent.go プロジェクト: johnvilsack/golang-stuff
// 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
}