seaweedfs/weed/command/master.go

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package command
import (
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"net/http"
"os"
"runtime"
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"strconv"
"strings"
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"time"
"github.com/chrislusf/seaweedfs/weed/glog"
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"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
"github.com/chrislusf/seaweedfs/weed/server"
"github.com/chrislusf/seaweedfs/weed/util"
"github.com/gorilla/mux"
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"google.golang.org/grpc/reflection"
)
func init() {
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cmdMaster.Run = runMaster // break init cycle
}
var cmdMaster = &Command{
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UsageLine: "master -port=9333",
Short: "start a master server",
Long: `start a master server to provide volume=>location mapping service
and sequence number of file ids
`,
}
var (
mport = cmdMaster.Flag.Int("port", 9333, "http listen port")
mGrpcPort = cmdMaster.Flag.Int("port.grpc", 0, "grpc server listen port, default to http port + 10000")
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masterIp = cmdMaster.Flag.String("ip", "localhost", "master <ip>|<server> address")
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masterBindIp = cmdMaster.Flag.String("ip.bind", "0.0.0.0", "ip address to bind to")
metaFolder = cmdMaster.Flag.String("mdir", os.TempDir(), "data directory to store meta data")
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masterPeers = cmdMaster.Flag.String("peers", "", "all master nodes in comma separated ip:port list, example: 127.0.0.1:9093,127.0.0.1:9094")
volumeSizeLimitMB = cmdMaster.Flag.Uint("volumeSizeLimitMB", 30*1000, "Master stops directing writes to oversized volumes.")
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volumePreallocate = cmdMaster.Flag.Bool("volumePreallocate", false, "Preallocate disk space for volumes.")
mpulse = cmdMaster.Flag.Int("pulseSeconds", 5, "number of seconds between heartbeats")
defaultReplicaPlacement = cmdMaster.Flag.String("defaultReplication", "000", "Default replication type if not specified.")
// mTimeout = cmdMaster.Flag.Int("idleTimeout", 30, "connection idle seconds")
mMaxCpu = cmdMaster.Flag.Int("maxCpu", 0, "maximum number of CPUs. 0 means all available CPUs")
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garbageThreshold = cmdMaster.Flag.Float64("garbageThreshold", 0.3, "threshold to vacuum and reclaim spaces")
masterWhiteListOption = cmdMaster.Flag.String("whiteList", "", "comma separated Ip addresses having write permission. No limit if empty.")
masterSecureKey = cmdMaster.Flag.String("secure.secret", "", "secret to encrypt Json Web Token(JWT)")
masterCpuProfile = cmdMaster.Flag.String("cpuprofile", "", "cpu profile output file")
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masterMemProfile = cmdMaster.Flag.String("memprofile", "", "memory profile output file")
masterWhiteList []string
)
func runMaster(cmd *Command, args []string) bool {
if *mMaxCpu < 1 {
*mMaxCpu = runtime.NumCPU()
}
runtime.GOMAXPROCS(*mMaxCpu)
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util.SetupProfiling(*masterCpuProfile, *masterMemProfile)
if err := util.TestFolderWritable(*metaFolder); err != nil {
glog.Fatalf("Check Meta Folder (-mdir) Writable %s : %s", *metaFolder, err)
}
if *masterWhiteListOption != "" {
masterWhiteList = strings.Split(*masterWhiteListOption, ",")
}
if *volumeSizeLimitMB > 30*1000 {
glog.Fatalf("volumeSizeLimitMB should be smaller than 30000")
}
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r := mux.NewRouter()
ms := weed_server.NewMasterServer(r, *mport, *metaFolder,
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*volumeSizeLimitMB, *volumePreallocate,
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*mpulse, *defaultReplicaPlacement, *garbageThreshold,
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masterWhiteList, *masterSecureKey,
)
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listeningAddress := *masterBindIp + ":" + strconv.Itoa(*mport)
glog.V(0).Infoln("Start Seaweed Master", util.VERSION, "at", listeningAddress)
masterListener, e := util.NewListener(listeningAddress, 0)
if e != nil {
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glog.Fatalf("Master startup error: %v", e)
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}
go func() {
time.Sleep(100 * time.Millisecond)
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myMasterAddress, peers := checkPeers(*masterIp, *mport, *masterPeers)
raftServer := weed_server.NewRaftServer(r, peers, myMasterAddress, *metaFolder, ms.Topo, *mpulse)
ms.SetRaftServer(raftServer)
}()
go func() {
// starting grpc server
grpcPort := *mGrpcPort
if grpcPort == 0 {
grpcPort = *mport + 10000
}
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grpcL, err := util.NewListener(*masterBindIp+":"+strconv.Itoa(grpcPort), 0)
if err != nil {
glog.Fatalf("master failed to listen on grpc port %d: %v", grpcPort, err)
}
// Create your protocol servers.
grpcS := util.NewGrpcServer()
master_pb.RegisterSeaweedServer(grpcS, ms)
reflection.Register(grpcS)
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glog.V(0).Infof("Start Seaweed Master %s grpc server at %s:%d", util.VERSION, *masterBindIp, grpcPort)
grpcS.Serve(grpcL)
}()
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// start http server
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httpS := &http.Server{Handler: r}
if err := httpS.Serve(masterListener); err != nil {
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glog.Fatalf("master server failed to serve: %v", err)
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}
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return true
}
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func checkPeers(masterIp string, masterPort int, peers string) (masterAddress string, cleanedPeers []string) {
masterAddress = masterIp + ":" + strconv.Itoa(masterPort)
if peers != "" {
cleanedPeers = strings.Split(peers, ",")
}
hasSelf := false
for _, peer := range cleanedPeers {
if peer == masterAddress {
hasSelf = true
break
}
}
peerCount := len(cleanedPeers)
if !hasSelf {
peerCount += 1
}
if peerCount%2 == 0 {
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glog.Fatalf("Only odd number of masters are supported!")
}
return
}