Exemplo n.º 1
0
func initCmd(subFlags *flag.FlagSet, args []string) error {
	waitTime := subFlags.Duration("wait_time", 5*time.Minute, "how long to wait for startup")
	initDBSQLFile := subFlags.String("init_db_sql_file", "", "path to .sql file to run after mysql_install_db")
	subFlags.Parse(args)

	// Generate my.cnf from scratch and use it to find mysqld.
	mysqld, err := mysqlctl.CreateMysqld(uint32(*tabletUID), *mysqlSocket, int32(*mysqlPort), dbconfigFlags)
	if err != nil {
		return fmt.Errorf("failed to initialize mysql config: %v", err)
	}
	defer mysqld.Close()

	ctx, cancel := context.WithTimeout(context.Background(), *waitTime)
	defer cancel()
	if err := mysqld.Init(ctx, *initDBSQLFile); err != nil {
		return fmt.Errorf("failed init mysql: %v", err)
	}
	return nil
}
Exemplo n.º 2
0
func main() {
	defer exit.Recover()
	defer logutil.Flush()

	dbconfigFlags := dbconfigs.AppConfig | dbconfigs.DbaConfig |
		dbconfigs.FilteredConfig | dbconfigs.ReplConfig
	dbconfigs.RegisterFlags(dbconfigFlags)
	flag.Parse()

	// We'll register this OnTerm handler before mysqld starts, so we get notified
	// if mysqld dies on its own without us (or our RPC client) telling it to.
	mysqldTerminated := make(chan struct{})
	onTermFunc := func() {
		close(mysqldTerminated)
	}

	// Start or Init mysqld as needed.
	ctx, cancel := context.WithTimeout(context.Background(), *waitTime)
	tabletDir := mysqlctl.TabletDir(uint32(*tabletUID))
	if _, statErr := os.Stat(tabletDir); os.IsNotExist(statErr) {
		// Generate my.cnf from scratch and use it to find mysqld.
		log.Infof("tablet dir (%s) doesn't exist, initializing", tabletDir)

		var err error
		mysqld, err = mysqlctl.CreateMysqld(uint32(*tabletUID), *mysqlSocket, int32(*mysqlPort), dbconfigFlags)
		if err != nil {
			log.Errorf("failed to initialize mysql config: %v", err)
			exit.Return(1)
		}
		mysqld.OnTerm(onTermFunc)

		if err := mysqld.Init(ctx, *initDBSQLFile); err != nil {
			log.Errorf("failed to initialize mysql data dir and start mysqld: %v", err)
			exit.Return(1)
		}
	} else {
		// There ought to be an existing my.cnf, so use it to find mysqld.
		log.Infof("tablet dir (%s) already exists, starting without init", tabletDir)

		var err error
		mysqld, err = mysqlctl.OpenMysqld(uint32(*tabletUID), dbconfigFlags)
		if err != nil {
			log.Errorf("failed to find mysql config: %v", err)
			exit.Return(1)
		}
		mysqld.OnTerm(onTermFunc)

		if err := mysqld.Start(ctx); err != nil {
			log.Errorf("failed to start mysqld: %v", err)
			exit.Return(1)
		}
	}
	cancel()

	servenv.Init()
	defer servenv.Close()

	// Take mysqld down with us on SIGTERM before entering lame duck.
	servenv.OnTerm(func() {
		log.Infof("mysqlctl received SIGTERM, shutting down mysqld first")
		ctx := context.Background()
		mysqld.Shutdown(ctx, false)
	})

	// Start RPC server and wait for SIGTERM.
	mysqlctldTerminated := make(chan struct{})
	go func() {
		servenv.RunDefault()
		close(mysqlctldTerminated)
	}()

	select {
	case <-mysqldTerminated:
		log.Infof("mysqld shut down on its own, exiting mysqlctld")
	case <-mysqlctldTerminated:
		log.Infof("mysqlctld shut down gracefully")
	}
}