seaweedfs/weed/command/mq_broker.go

package command

import (
	"fmt"
	"net/http"
	_ "net/http/pprof"

	"google.golang.org/grpc/reflection"

	"github.com/seaweedfs/seaweedfs/weed/util/grace"

	"github.com/seaweedfs/seaweedfs/weed/glog"
	"github.com/seaweedfs/seaweedfs/weed/mq/broker"
	"github.com/seaweedfs/seaweedfs/weed/pb"
	"github.com/seaweedfs/seaweedfs/weed/pb/mq_pb"
	"github.com/seaweedfs/seaweedfs/weed/security"
	"github.com/seaweedfs/seaweedfs/weed/util"
)

var (
	mqBrokerStandaloneOptions MessageQueueBrokerOptions
)

type MessageQueueBrokerOptions struct {
	masters          map[string]pb.ServerAddress
	mastersString    *string
	filerGroup       *string
	ip               *string
	port             *int
	pprofPort        *int
	dataCenter       *string
	rack             *string
	cpuprofile       *string
	memprofile       *string
	logFlushInterval *int
}

func init() {
	cmdMqBroker.Run = runMqBroker // break init cycle
	mqBrokerStandaloneOptions.mastersString = cmdMqBroker.Flag.String("master", "localhost:9333", "comma-separated master servers")
	mqBrokerStandaloneOptions.filerGroup = cmdMqBroker.Flag.String("filerGroup", "", "share metadata with other filers in the same filerGroup")
	mqBrokerStandaloneOptions.ip = cmdMqBroker.Flag.String("ip", util.DetectedHostAddress(), "broker host address")
	mqBrokerStandaloneOptions.port = cmdMqBroker.Flag.Int("port", 17777, "broker gRPC listen port")
	mqBrokerStandaloneOptions.pprofPort = cmdMqBroker.Flag.Int("port.pprof", 0, "HTTP profiling port (0 to disable)")
	mqBrokerStandaloneOptions.dataCenter = cmdMqBroker.Flag.String("dataCenter", "", "prefer to read and write to volumes in this data center")
	mqBrokerStandaloneOptions.rack = cmdMqBroker.Flag.String("rack", "", "prefer to write to volumes in this rack")
	mqBrokerStandaloneOptions.cpuprofile = cmdMqBroker.Flag.String("cpuprofile", "", "cpu profile output file")
	mqBrokerStandaloneOptions.memprofile = cmdMqBroker.Flag.String("memprofile", "", "memory profile output file")
	mqBrokerStandaloneOptions.logFlushInterval = cmdMqBroker.Flag.Int("logFlushInterval", 5, "log buffer flush interval in seconds")
}

var cmdMqBroker = &Command{
	UsageLine: "mq.broker [-port=17777] [-master=<ip:port>]",
	Short:     "<WIP> start a message queue broker",
	Long: `start a message queue broker

	The broker can accept gRPC calls to write or read messages. The messages are stored via filer.
	The brokers are stateless. To scale up, just add more brokers.

`,
}

func runMqBroker(cmd *Command, args []string) bool {

	util.LoadSecurityConfiguration()

	mqBrokerStandaloneOptions.masters = pb.ServerAddresses(*mqBrokerStandaloneOptions.mastersString).ToAddressMap()

	return mqBrokerStandaloneOptions.startQueueServer()

}

func (mqBrokerOpt *MessageQueueBrokerOptions) startQueueServer() bool {

	grace.SetupProfiling(*mqBrokerStandaloneOptions.cpuprofile, *mqBrokerStandaloneOptions.memprofile)

	grpcDialOption := security.LoadClientTLS(util.GetViper(), "grpc.msg_broker")

	qs, err := broker.NewMessageBroker(&broker.MessageQueueBrokerOption{
		Masters:            mqBrokerOpt.masters,
		FilerGroup:         *mqBrokerOpt.filerGroup,
		DataCenter:         *mqBrokerOpt.dataCenter,
		Rack:               *mqBrokerOpt.rack,
		DefaultReplication: "",
		MaxMB:              0,
		Ip:                 *mqBrokerOpt.ip,
		Port:               *mqBrokerOpt.port,
		LogFlushInterval:   *mqBrokerOpt.logFlushInterval,
	}, grpcDialOption)
	if err != nil {
		glog.Fatalf("failed to create new message broker for queue server: %v", err)
	}

	// start grpc listener
	grpcL, localL, err := util.NewIpAndLocalListeners("", *mqBrokerOpt.port, 0)
	if err != nil {
		glog.Fatalf("failed to listen on grpc port %d: %v", *mqBrokerOpt.port, err)
	}

	// Create main gRPC server
	grpcS := pb.NewGrpcServer(security.LoadServerTLS(util.GetViper(), "grpc.msg_broker"))
	mq_pb.RegisterSeaweedMessagingServer(grpcS, qs)
	reflection.Register(grpcS)

	// Start localhost listener if available
	if localL != nil {
		localGrpcS := pb.NewGrpcServer(security.LoadServerTLS(util.GetViper(), "grpc.msg_broker"))
		mq_pb.RegisterSeaweedMessagingServer(localGrpcS, qs)
		reflection.Register(localGrpcS)
		go func() {
			glog.V(0).Infof("MQ Broker listening on localhost:%d", *mqBrokerOpt.port)
			if err := localGrpcS.Serve(localL); err != nil {
				glog.Errorf("MQ Broker localhost listener error: %v", err)
			}
		}()
	}

	// Start HTTP profiling server if enabled
	if mqBrokerOpt.pprofPort != nil && *mqBrokerOpt.pprofPort > 0 {
		go func() {
			pprofAddr := fmt.Sprintf(":%d", *mqBrokerOpt.pprofPort)
			glog.V(0).Infof("MQ Broker pprof server listening on %s", pprofAddr)
			glog.V(0).Infof("Access profiling at: http://localhost:%d/debug/pprof/", *mqBrokerOpt.pprofPort)
			if err := http.ListenAndServe(pprofAddr, nil); err != nil {
				glog.Errorf("pprof server error: %v", err)
			}
		}()
	}

	glog.V(0).Infof("MQ Broker listening on %s:%d", *mqBrokerOpt.ip, *mqBrokerOpt.port)
	grpcS.Serve(grpcL)

	return true

}