seaweedfs/weed/command/master.go

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package command
import (
"github.com/chrislusf/raft/protobuf"
"github.com/gorilla/mux"
"google.golang.org/grpc/reflection"
"net/http"
"os"
"sort"
"strings"
"time"
"github.com/chrislusf/seaweedfs/weed/util/grace"
"github.com/chrislusf/seaweedfs/weed/glog"
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"github.com/chrislusf/seaweedfs/weed/pb"
"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
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"github.com/chrislusf/seaweedfs/weed/security"
"github.com/chrislusf/seaweedfs/weed/server"
"github.com/chrislusf/seaweedfs/weed/storage/backend"
"github.com/chrislusf/seaweedfs/weed/util"
)
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var (
m MasterOptions
)
type MasterOptions struct {
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port *int
ip *string
ipBind *string
metaFolder *string
peers *string
volumeSizeLimitMB *uint
volumePreallocate *bool
// pulseSeconds *int
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defaultReplication *string
garbageThreshold *float64
whiteList *string
disableHttp *bool
metricsAddress *string
metricsIntervalSec *int
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raftResumeState *bool
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}
func init() {
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cmdMaster.Run = runMaster // break init cycle
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m.port = cmdMaster.Flag.Int("port", 9333, "http listen port")
m.ip = cmdMaster.Flag.String("ip", util.DetectedHostAddress(), "master <ip>|<server> address, also used as identifier")
m.ipBind = cmdMaster.Flag.String("ip.bind", "", "ip address to bind to")
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m.metaFolder = cmdMaster.Flag.String("mdir", os.TempDir(), "data directory to store meta data")
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m.peers = cmdMaster.Flag.String("peers", "", "all master nodes in comma separated ip:port list, example: 127.0.0.1:9093,127.0.0.1:9094,127.0.0.1:9095")
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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", "", "Default replication type if not specified.")
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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 <host>:<port>")
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m.metricsIntervalSec = cmdMaster.Flag.Int("metrics.intervalSeconds", 15, "Prometheus push interval in seconds")
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m.raftResumeState = cmdMaster.Flag.Bool("resumeState", false, "resume previous state on start master server")
}
var cmdMaster = &Command{
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UsageLine: "master -port=9333",
Short: "start a master server",
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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/", "/usr/local/etc/seaweedfs/", or "/etc/seaweedfs/", in that order.
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The example security.toml configuration file can be generated by "weed scaffold -config=security"
`,
}
var (
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masterCpuProfile = cmdMaster.Flag.String("cpuprofile", "", "cpu profile output file")
masterMemProfile = cmdMaster.Flag.String("memprofile", "", "memory profile output file")
)
func runMaster(cmd *Command, args []string) bool {
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util.LoadConfiguration("security", false)
util.LoadConfiguration("master", false)
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grace.SetupProfiling(*masterCpuProfile, *masterMemProfile)
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parent, _ := util.FullPath(*m.metaFolder).DirAndName()
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if util.FileExists(string(parent)) && !util.FileExists(*m.metaFolder) {
os.MkdirAll(*m.metaFolder, 0755)
}
if err := util.TestFolderWritable(util.ResolvePath(*m.metaFolder)); err != nil {
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glog.Fatalf("Check Meta Folder (-mdir) Writable %s : %s", *m.metaFolder, err)
}
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var masterWhiteList []string
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if *m.whiteList != "" {
masterWhiteList = strings.Split(*m.whiteList, ",")
}
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if *m.volumeSizeLimitMB > util.VolumeSizeLimitGB*1000 {
glog.Fatalf("volumeSizeLimitMB should be smaller than 30000")
}
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startMaster(m, masterWhiteList)
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return true
}
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func startMaster(masterOption MasterOptions, masterWhiteList []string) {
backend.LoadConfiguration(util.GetViper())
myMasterAddress, peers := checkPeers(*masterOption.ip, *masterOption.port, *masterOption.peers)
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r := mux.NewRouter()
ms := weed_server.NewMasterServer(r, masterOption.toMasterOption(masterWhiteList), peers)
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listeningAddress := util.JoinHostPort(*masterOption.ipBind, *masterOption.port)
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glog.V(0).Infof("Start Seaweed Master %s at %s", util.Version(), 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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}
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// start raftServer
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raftServer, err := weed_server.NewRaftServer(security.LoadClientTLS(util.GetViper(), "grpc.master"),
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peers, myMasterAddress, util.ResolvePath(*masterOption.metaFolder), ms.Topo, *masterOption.raftResumeState)
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if raftServer == nil {
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glog.Fatalf("please verify %s is writable, see https://github.com/chrislusf/seaweedfs/issues/717: %s", *masterOption.metaFolder, err)
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}
ms.SetRaftServer(raftServer)
r.HandleFunc("/cluster/status", raftServer.StatusHandler).Methods("GET")
// starting grpc server
grpcPort := *masterOption.port + 10000
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grpcL, err := util.NewListener(util.JoinHostPort(*masterOption.ipBind, grpcPort), 0)
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if err != nil {
glog.Fatalf("master failed to listen on grpc port %d: %v", grpcPort, err)
}
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grpcS := pb.NewGrpcServer(security.LoadServerTLS(util.GetViper(), "grpc.master"))
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master_pb.RegisterSeaweedServer(grpcS, ms)
protobuf.RegisterRaftServer(grpcS, raftServer)
reflection.Register(grpcS)
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glog.V(0).Infof("Start Seaweed Master %s grpc server at %s:%d", util.Version(), *masterOption.ipBind, grpcPort)
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go grpcS.Serve(grpcL)
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go func() {
time.Sleep(1500 * time.Millisecond)
if ms.Topo.RaftServer.Leader() == "" && ms.Topo.RaftServer.IsLogEmpty() && isTheFirstOne(myMasterAddress, peers) {
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if ms.MasterClient.FindLeaderFromOtherPeers(myMasterAddress) == "" {
raftServer.DoJoinCommand()
}
}
}()
go ms.MasterClient.KeepConnectedToMaster()
// start http server
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httpS := &http.Server{Handler: r}
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go httpS.Serve(masterListener)
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select {}
}
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func checkPeers(masterIp string, masterPort int, peers string) (masterAddress string, cleanedPeers []string) {
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glog.V(0).Infof("current: %s:%d peers:%s", masterIp, masterPort, peers)
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masterAddress = util.JoinHostPort(masterIp, masterPort)
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if peers != "" {
cleanedPeers = strings.Split(peers, ",")
}
hasSelf := false
for _, peer := range cleanedPeers {
if peer == masterAddress {
hasSelf = true
break
}
}
if !hasSelf {
cleanedPeers = append(cleanedPeers, masterAddress)
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}
if len(cleanedPeers)%2 == 0 {
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glog.Fatalf("Only odd number of masters are supported!")
}
return
}
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func isTheFirstOne(self string, peers []string) bool {
sort.Strings(peers)
if len(peers) <= 0 {
return true
}
return self == peers[0]
}
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func (m *MasterOptions) toMasterOption(whiteList []string) *weed_server.MasterOption {
return &weed_server.MasterOption{
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Host: *m.ip,
Port: *m.port,
MetaFolder: *m.metaFolder,
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VolumeSizeLimitMB: uint32(*m.volumeSizeLimitMB),
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VolumePreallocate: *m.volumePreallocate,
// PulseSeconds: *m.pulseSeconds,
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DefaultReplicaPlacement: *m.defaultReplication,
GarbageThreshold: *m.garbageThreshold,
WhiteList: whiteList,
DisableHttp: *m.disableHttp,
MetricsAddress: *m.metricsAddress,
MetricsIntervalSec: *m.metricsIntervalSec,
}
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}