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master.go
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master.go
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package command
import (
"net/http"
"os"
"runtime"
"strconv"
"strings"
"github.com/chrislusf/raft/protobuf"
"github.com/chrislusf/seaweedfs/weed/glog"
"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
"github.com/chrislusf/seaweedfs/weed/security"
"github.com/chrislusf/seaweedfs/weed/server"
"github.com/chrislusf/seaweedfs/weed/util"
"github.com/gorilla/mux"
"github.com/spf13/viper"
"google.golang.org/grpc/reflection"
)
var (
m MasterOptions
)
type MasterOptions struct {
port *int
ip *string
ipBind *string
metaFolder *string
peers *string
volumeSizeLimitMB *uint
volumePreallocate *bool
pulseSeconds *int
defaultReplication *string
garbageThreshold *float64
whiteList *string
disableHttp *bool
metricsAddress *string
metricsIntervalSec *int
}
func init() {
cmdMaster.Run = runMaster // break init cycle
m.port = cmdMaster.Flag.Int("port", 9333, "http listen port")
m.ip = cmdMaster.Flag.String("ip", "localhost", "master <ip>|<server> address")
m.ipBind = cmdMaster.Flag.String("ip.bind", "0.0.0.0", "ip address to bind to")
m.metaFolder = cmdMaster.Flag.String("mdir", os.TempDir(), "data directory to store meta data")
m.peers = cmdMaster.Flag.String("peers", "", "all master nodes in comma separated ip:port list, example: 127.0.0.1:9093,127.0.0.1:9094")
m.volumeSizeLimitMB = cmdMaster.Flag.Uint("volumeSizeLimitMB", 30*1000, "Master stops directing writes to oversized volumes.")
m.volumePreallocate = cmdMaster.Flag.Bool("volumePreallocate", false, "Preallocate disk space for volumes.")
m.pulseSeconds = cmdMaster.Flag.Int("pulseSeconds", 5, "number of seconds between heartbeats")
m.defaultReplication = cmdMaster.Flag.String("defaultReplication", "000", "Default replication type if not specified.")
m.garbageThreshold = cmdMaster.Flag.Float64("garbageThreshold", 0.3, "threshold to vacuum and reclaim spaces")
m.whiteList = cmdMaster.Flag.String("whiteList", "", "comma separated Ip addresses having write permission. No limit if empty.")
m.disableHttp = cmdMaster.Flag.Bool("disableHttp", false, "disable http requests, only gRPC operations are allowed.")
m.metricsAddress = cmdMaster.Flag.String("metrics.address", "", "Prometheus gateway address")
m.metricsIntervalSec = cmdMaster.Flag.Int("metrics.intervalSeconds", 15, "Prometheus push interval in seconds")
}
var cmdMaster = &Command{
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
The configuration file "security.toml" is read from ".", "$HOME/.seaweedfs/", or "/etc/seaweedfs/", in that order.
The example security.toml configuration file can be generated by "weed scaffold -config=security"
`,
}
var (
masterCpuProfile = cmdMaster.Flag.String("cpuprofile", "", "cpu profile output file")
masterMemProfile = cmdMaster.Flag.String("memprofile", "", "memory profile output file")
masterWhiteList []string
)
func runMaster(cmd *Command, args []string) bool {
util.LoadConfiguration("security", false)
util.LoadConfiguration("master", false)
runtime.GOMAXPROCS(runtime.NumCPU())
util.SetupProfiling(*masterCpuProfile, *masterMemProfile)
if err := util.TestFolderWritable(*m.metaFolder); err != nil {
glog.Fatalf("Check Meta Folder (-mdir) Writable %s : %s", *m.metaFolder, err)
}
if *m.whiteList != "" {
masterWhiteList = strings.Split(*m.whiteList, ",")
}
if *m.volumeSizeLimitMB > util.VolumeSizeLimitGB*1000 {
glog.Fatalf("volumeSizeLimitMB should be smaller than 30000")
}
r := mux.NewRouter()
ms := weed_server.NewMasterServer(r, m.toMasterOption(masterWhiteList))
listeningAddress := *m.ipBind + ":" + strconv.Itoa(*m.port)
glog.V(0).Infoln("Start Seaweed Master", util.VERSION, "at", listeningAddress)
masterListener, e := util.NewListener(listeningAddress, 0)
if e != nil {
glog.Fatalf("Master startup error: %v", e)
}
go func() {
// start raftServer
myMasterAddress, peers := checkPeers(*m.ip, *m.port, *m.peers)
raftServer := weed_server.NewRaftServer(security.LoadClientTLS(viper.Sub("grpc"), "master"),
peers, myMasterAddress, *m.metaFolder, ms.Topo, *m.pulseSeconds)
if raftServer == nil {
glog.Fatalf("please verify %s is writable, see https://github.com/chrislusf/seaweedfs/issues/717", *m.metaFolder)
}
ms.SetRaftServer(raftServer)
r.HandleFunc("/cluster/status", raftServer.StatusHandler).Methods("GET")
// starting grpc server
grpcPort := *m.port + 10000
grpcL, err := util.NewListener(*m.ipBind+":"+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(security.LoadServerTLS(viper.Sub("grpc"), "master"))
master_pb.RegisterSeaweedServer(grpcS, ms)
protobuf.RegisterRaftServer(grpcS, raftServer)
reflection.Register(grpcS)
glog.V(0).Infof("Start Seaweed Master %s grpc server at %s:%d", util.VERSION, *m.ipBind, grpcPort)
grpcS.Serve(grpcL)
}()
// start http server
httpS := &http.Server{Handler: r}
if err := httpS.Serve(masterListener); err != nil {
glog.Fatalf("master server failed to serve: %v", err)
}
return true
}
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 {
glog.Fatalf("Only odd number of masters are supported!")
}
return
}
func (m *MasterOptions) toMasterOption(whiteList []string) *weed_server.MasterOption {
return &weed_server.MasterOption{
Port: *m.port,
MetaFolder: *m.metaFolder,
VolumeSizeLimitMB: *m.volumeSizeLimitMB,
VolumePreallocate: *m.volumePreallocate,
PulseSeconds: *m.pulseSeconds,
DefaultReplicaPlacement: *m.defaultReplication,
GarbageThreshold: *m.garbageThreshold,
WhiteList: whiteList,
DisableHttp: *m.disableHttp,
MetricsAddress: *m.metricsAddress,
MetricsIntervalSec: *m.metricsIntervalSec,
}
}