package weed_server import ( "context" "fmt" "net/http" "net/http/httputil" "net/url" "os" "regexp" "strconv" "strings" "sync" "time" "github.com/chrislusf/raft" "github.com/gorilla/mux" "google.golang.org/grpc" "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/sequence" "github.com/chrislusf/seaweedfs/weed/shell" "github.com/chrislusf/seaweedfs/weed/topology" "github.com/chrislusf/seaweedfs/weed/util" "github.com/chrislusf/seaweedfs/weed/wdclient" ) const ( SequencerType = "master.sequencer.type" SequencerEtcdUrls = "master.sequencer.sequencer_etcd_urls" ) type MasterOption struct { Port int MetaFolder string VolumeSizeLimitMB uint VolumePreallocate bool PulseSeconds int DefaultReplicaPlacement string GarbageThreshold float64 WhiteList []string DisableHttp bool MetricsAddress string MetricsIntervalSec int } type MasterServer struct { option *MasterOption guard *security.Guard preallocateSize int64 Topo *topology.Topology vg *topology.VolumeGrowth vgLock sync.Mutex bounedLeaderChan chan int // notifying clients clientChansLock sync.RWMutex clientChans map[string]chan *master_pb.VolumeLocation grpcDialOption grpc.DialOption MasterClient *wdclient.MasterClient } func NewMasterServer(r *mux.Router, option *MasterOption, peers []string) *MasterServer { v := util.GetViper() signingKey := v.GetString("jwt.signing.key") v.SetDefault("jwt.signing.expires_after_seconds", 10) expiresAfterSec := v.GetInt("jwt.signing.expires_after_seconds") readSigningKey := v.GetString("jwt.signing.read.key") v.SetDefault("jwt.signing.read.expires_after_seconds", 60) readExpiresAfterSec := v.GetInt("jwt.signing.read.expires_after_seconds") var preallocateSize int64 if option.VolumePreallocate { preallocateSize = int64(option.VolumeSizeLimitMB) * (1 << 20) } grpcDialOption := security.LoadClientTLS(v, "grpc.master") ms := &MasterServer{ option: option, preallocateSize: preallocateSize, clientChans: make(map[string]chan *master_pb.VolumeLocation), grpcDialOption: grpcDialOption, MasterClient: wdclient.NewMasterClient(context.Background(), grpcDialOption, "master", peers), } ms.bounedLeaderChan = make(chan int, 16) seq := ms.createSequencer(option) if nil == seq { glog.Fatalf("create sequencer failed.") } ms.Topo = topology.NewTopology("topo", seq, uint64(ms.option.VolumeSizeLimitMB)*1024*1024, ms.option.PulseSeconds) ms.vg = topology.NewDefaultVolumeGrowth() glog.V(0).Infoln("Volume Size Limit is", ms.option.VolumeSizeLimitMB, "MB") ms.guard = security.NewGuard(ms.option.WhiteList, signingKey, expiresAfterSec, readSigningKey, readExpiresAfterSec) if !ms.option.DisableHttp { handleStaticResources2(r) r.HandleFunc("/", ms.proxyToLeader(ms.uiStatusHandler)) r.HandleFunc("/ui/index.html", ms.uiStatusHandler) r.HandleFunc("/dir/assign", ms.proxyToLeader(ms.guard.WhiteList(ms.dirAssignHandler))) r.HandleFunc("/dir/lookup", ms.guard.WhiteList(ms.dirLookupHandler)) r.HandleFunc("/dir/status", ms.proxyToLeader(ms.guard.WhiteList(ms.dirStatusHandler))) r.HandleFunc("/col/delete", ms.proxyToLeader(ms.guard.WhiteList(ms.collectionDeleteHandler))) r.HandleFunc("/vol/grow", ms.proxyToLeader(ms.guard.WhiteList(ms.volumeGrowHandler))) r.HandleFunc("/vol/status", ms.proxyToLeader(ms.guard.WhiteList(ms.volumeStatusHandler))) r.HandleFunc("/vol/vacuum", ms.proxyToLeader(ms.guard.WhiteList(ms.volumeVacuumHandler))) r.HandleFunc("/submit", ms.guard.WhiteList(ms.submitFromMasterServerHandler)) /* r.HandleFunc("/stats/health", ms.guard.WhiteList(statsHealthHandler)) r.HandleFunc("/stats/counter", ms.guard.WhiteList(statsCounterHandler)) r.HandleFunc("/stats/memory", ms.guard.WhiteList(statsMemoryHandler)) */ r.HandleFunc("/{fileId}", ms.redirectHandler) } ms.Topo.StartRefreshWritableVolumes(ms.grpcDialOption, ms.option.GarbageThreshold, ms.preallocateSize) ms.startAdminScripts() return ms } func (ms *MasterServer) SetRaftServer(raftServer *RaftServer) { ms.Topo.RaftServer = raftServer.raftServer ms.Topo.RaftServer.AddEventListener(raft.LeaderChangeEventType, func(e raft.Event) { glog.V(0).Infof("event: %+v", e) if ms.Topo.RaftServer.Leader() != "" { glog.V(0).Infoln("[", ms.Topo.RaftServer.Name(), "]", ms.Topo.RaftServer.Leader(), "becomes leader.") } }) ms.Topo.RaftServer.AddEventListener(raft.StateChangeEventType, func(e raft.Event) { glog.V(0).Infof("state change: %+v", e) }) if ms.Topo.IsLeader() { glog.V(0).Infoln("[", ms.Topo.RaftServer.Name(), "]", "I am the leader!") } else { if ms.Topo.RaftServer.Leader() != "" { glog.V(0).Infoln("[", ms.Topo.RaftServer.Name(), "]", ms.Topo.RaftServer.Leader(), "is the leader.") } } } func (ms *MasterServer) proxyToLeader(f func(w http.ResponseWriter, r *http.Request)) func(w http.ResponseWriter, r *http.Request) { return func(w http.ResponseWriter, r *http.Request) { if ms.Topo.IsLeader() { f(w, r) } else if ms.Topo.RaftServer != nil && ms.Topo.RaftServer.Leader() != "" { ms.bounedLeaderChan <- 1 defer func() { <-ms.bounedLeaderChan }() targetUrl, err := url.Parse("http://" + ms.Topo.RaftServer.Leader()) if err != nil { writeJsonError(w, r, http.StatusInternalServerError, fmt.Errorf("Leader URL http://%s Parse Error: %v", ms.Topo.RaftServer.Leader(), err)) return } glog.V(4).Infoln("proxying to leader", ms.Topo.RaftServer.Leader()) proxy := httputil.NewSingleHostReverseProxy(targetUrl) director := proxy.Director proxy.Director = func(req *http.Request) { actualHost, err := security.GetActualRemoteHost(req) if err == nil { req.Header.Set("HTTP_X_FORWARDED_FOR", actualHost) } director(req) } proxy.Transport = util.Transport proxy.ServeHTTP(w, r) } else { // drop it to the floor // writeJsonError(w, r, errors.New(ms.Topo.RaftServer.Name()+" does not know Leader yet:"+ms.Topo.RaftServer.Leader())) } } } func (ms *MasterServer) startAdminScripts() { var err error v := util.GetViper() adminScripts := v.GetString("master.maintenance.scripts") glog.V(0).Infof("adminScripts:\n%v", adminScripts) if adminScripts == "" { return } v.SetDefault("master.maintenance.sleep_minutes", 17) sleepMinutes := v.GetInt("master.maintenance.sleep_minutes") v.SetDefault("master.filer.default_filer_url", "http://localhost:8888/") filerURL := v.GetString("master.filer.default_filer_url") scriptLines := strings.Split(adminScripts, "\n") masterAddress := "localhost:" + strconv.Itoa(ms.option.Port) var shellOptions shell.ShellOptions shellOptions.GrpcDialOption = security.LoadClientTLS(v, "grpc.master") shellOptions.Masters = &masterAddress shellOptions.FilerHost, shellOptions.FilerPort, shellOptions.Directory, err = util.ParseFilerUrl(filerURL) if err != nil { glog.V(0).Infof("failed to parse master.filer.default_filer_urll=%s : %v\n", filerURL, err) return } commandEnv := shell.NewCommandEnv(shellOptions) reg, _ := regexp.Compile(`'.*?'|".*?"|\S+`) go commandEnv.MasterClient.KeepConnectedToMaster() go func() { commandEnv.MasterClient.WaitUntilConnected() c := time.Tick(time.Duration(sleepMinutes) * time.Minute) for range c { if ms.Topo.IsLeader() { for _, line := range scriptLines { cmds := reg.FindAllString(line, -1) if len(cmds) == 0 { continue } args := make([]string, len(cmds[1:])) for i := range args { args[i] = strings.Trim(string(cmds[1+i]), "\"'") } cmd := strings.ToLower(cmds[0]) for _, c := range shell.Commands { if c.Name() == cmd { glog.V(0).Infof("executing: %s %v", cmd, args) if err := c.Do(args, commandEnv, os.Stdout); err != nil { glog.V(0).Infof("error: %v", err) } } } } } } }() } func (ms *MasterServer) createSequencer(option *MasterOption) sequence.Sequencer { var seq sequence.Sequencer v := util.GetViper() seqType := strings.ToLower(v.GetString(SequencerType)) glog.V(1).Infof("[%s] : [%s]", SequencerType, seqType) switch strings.ToLower(seqType) { case "etcd": var err error urls := v.GetString(SequencerEtcdUrls) glog.V(0).Infof("[%s] : [%s]", SequencerEtcdUrls, urls) seq, err = sequence.NewEtcdSequencer(urls, option.MetaFolder) if err != nil { glog.Error(err) seq = nil } default: seq = sequence.NewMemorySequencer() } return seq }