mirror of
https://github.com/chrislusf/seaweedfs
synced 2024-05-03 10:00:03 +02:00
271 lines
8.5 KiB
Go
271 lines
8.5 KiB
Go
package weed_server
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import (
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"context"
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"fmt"
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"net/http"
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"net/http/httputil"
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"net/url"
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"os"
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"regexp"
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"strconv"
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"strings"
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"sync"
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"time"
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"github.com/chrislusf/raft"
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"github.com/gorilla/mux"
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"google.golang.org/grpc"
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"github.com/chrislusf/seaweedfs/weed/glog"
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"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
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"github.com/chrislusf/seaweedfs/weed/security"
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"github.com/chrislusf/seaweedfs/weed/sequence"
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"github.com/chrislusf/seaweedfs/weed/shell"
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"github.com/chrislusf/seaweedfs/weed/topology"
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"github.com/chrislusf/seaweedfs/weed/util"
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"github.com/chrislusf/seaweedfs/weed/wdclient"
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)
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const (
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SequencerType = "master.sequencer.type"
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SequencerEtcdUrls = "master.sequencer.sequencer_etcd_urls"
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)
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type MasterOption struct {
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Port int
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MetaFolder string
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VolumeSizeLimitMB uint
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VolumePreallocate bool
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PulseSeconds int
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DefaultReplicaPlacement string
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GarbageThreshold float64
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WhiteList []string
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DisableHttp bool
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MetricsAddress string
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MetricsIntervalSec int
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}
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type MasterServer struct {
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option *MasterOption
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guard *security.Guard
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preallocateSize int64
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Topo *topology.Topology
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vg *topology.VolumeGrowth
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vgLock sync.Mutex
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bounedLeaderChan chan int
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// notifying clients
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clientChansLock sync.RWMutex
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clientChans map[string]chan *master_pb.VolumeLocation
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grpcDialOption grpc.DialOption
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MasterClient *wdclient.MasterClient
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}
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func NewMasterServer(r *mux.Router, option *MasterOption, peers []string) *MasterServer {
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v := util.GetViper()
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signingKey := v.GetString("jwt.signing.key")
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v.SetDefault("jwt.signing.expires_after_seconds", 10)
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expiresAfterSec := v.GetInt("jwt.signing.expires_after_seconds")
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readSigningKey := v.GetString("jwt.signing.read.key")
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v.SetDefault("jwt.signing.read.expires_after_seconds", 60)
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readExpiresAfterSec := v.GetInt("jwt.signing.read.expires_after_seconds")
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var preallocateSize int64
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if option.VolumePreallocate {
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preallocateSize = int64(option.VolumeSizeLimitMB) * (1 << 20)
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}
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grpcDialOption := security.LoadClientTLS(v, "grpc.master")
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ms := &MasterServer{
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option: option,
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preallocateSize: preallocateSize,
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clientChans: make(map[string]chan *master_pb.VolumeLocation),
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grpcDialOption: grpcDialOption,
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MasterClient: wdclient.NewMasterClient(context.Background(), grpcDialOption, "master", peers),
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}
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ms.bounedLeaderChan = make(chan int, 16)
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seq := ms.createSequencer(option)
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if nil == seq {
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glog.Fatalf("create sequencer failed.")
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}
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ms.Topo = topology.NewTopology("topo", seq, uint64(ms.option.VolumeSizeLimitMB)*1024*1024, ms.option.PulseSeconds)
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ms.vg = topology.NewDefaultVolumeGrowth()
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glog.V(0).Infoln("Volume Size Limit is", ms.option.VolumeSizeLimitMB, "MB")
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ms.guard = security.NewGuard(ms.option.WhiteList, signingKey, expiresAfterSec, readSigningKey, readExpiresAfterSec)
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if !ms.option.DisableHttp {
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handleStaticResources2(r)
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r.HandleFunc("/", ms.proxyToLeader(ms.uiStatusHandler))
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r.HandleFunc("/ui/index.html", ms.uiStatusHandler)
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r.HandleFunc("/dir/assign", ms.proxyToLeader(ms.guard.OldWhiteList(ms.dirAssignHandler)))
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r.HandleFunc("/dir/lookup", ms.guard.OldWhiteList(ms.dirLookupHandler))
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r.HandleFunc("/dir/status", ms.proxyToLeader(ms.guard.OldWhiteList(ms.dirStatusHandler)))
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r.HandleFunc("/col/delete", ms.proxyToLeader(ms.guard.OldWhiteList(ms.collectionDeleteHandler)))
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r.HandleFunc("/vol/grow", ms.proxyToLeader(ms.guard.OldWhiteList(ms.volumeGrowHandler)))
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r.HandleFunc("/vol/status", ms.proxyToLeader(ms.guard.OldWhiteList(ms.volumeStatusHandler)))
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r.HandleFunc("/vol/vacuum", ms.proxyToLeader(ms.guard.OldWhiteList(ms.volumeVacuumHandler)))
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r.HandleFunc("/submit", ms.guard.OldWhiteList(ms.submitFromMasterServerHandler))
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r.HandleFunc("/stats/health", ms.guard.OldWhiteList(statsHealthHandler))
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r.HandleFunc("/stats/counter", ms.guard.OldWhiteList(statsCounterHandler))
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r.HandleFunc("/stats/memory", ms.guard.OldWhiteList(statsMemoryHandler))
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r.HandleFunc("/{fileId}", ms.redirectHandler)
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}
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ms.Topo.StartRefreshWritableVolumes(ms.grpcDialOption, ms.option.GarbageThreshold, ms.preallocateSize)
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ms.startAdminScripts()
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return ms
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}
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func (ms *MasterServer) SetRaftServer(raftServer *RaftServer) {
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ms.Topo.RaftServer = raftServer.raftServer
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ms.Topo.RaftServer.AddEventListener(raft.LeaderChangeEventType, func(e raft.Event) {
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glog.V(0).Infof("event: %+v", e)
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if ms.Topo.RaftServer.Leader() != "" {
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glog.V(0).Infoln("[", ms.Topo.RaftServer.Name(), "]", ms.Topo.RaftServer.Leader(), "becomes leader.")
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}
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})
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ms.Topo.RaftServer.AddEventListener(raft.StateChangeEventType, func(e raft.Event) {
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glog.V(0).Infof("state change: %+v", e)
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})
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if ms.Topo.IsLeader() {
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glog.V(0).Infoln("[", ms.Topo.RaftServer.Name(), "]", "I am the leader!")
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} else {
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if ms.Topo.RaftServer.Leader() != "" {
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glog.V(0).Infoln("[", ms.Topo.RaftServer.Name(), "]", ms.Topo.RaftServer.Leader(), "is the leader.")
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}
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}
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}
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func (ms *MasterServer) proxyToLeader(f func(w http.ResponseWriter, r *http.Request)) func(w http.ResponseWriter, r *http.Request) {
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return func(w http.ResponseWriter, r *http.Request) {
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if ms.Topo.IsLeader() {
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f(w, r)
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} else if ms.Topo.RaftServer != nil && ms.Topo.RaftServer.Leader() != "" {
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ms.bounedLeaderChan <- 1
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defer func() { <-ms.bounedLeaderChan }()
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targetUrl, err := url.Parse("http://" + ms.Topo.RaftServer.Leader())
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if err != nil {
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oldWriteJsonError(w, r, http.StatusInternalServerError,
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fmt.Errorf("Leader URL http://%s Parse Error: %v", ms.Topo.RaftServer.Leader(), err))
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return
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}
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glog.V(4).Infoln("proxying to leader", ms.Topo.RaftServer.Leader())
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proxy := httputil.NewSingleHostReverseProxy(targetUrl)
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director := proxy.Director
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proxy.Director = func(req *http.Request) {
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actualHost, err := security.GetActualRemoteHost(req)
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if err == nil {
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req.Header.Set("HTTP_X_FORWARDED_FOR", actualHost)
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}
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director(req)
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}
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proxy.Transport = util.Transport
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proxy.ServeHTTP(w, r)
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} else {
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// drop it to the floor
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// oldWriteJsonError(w, r, errors.New(ms.Topo.RaftServer.Name()+" does not know Leader yet:"+ms.Topo.RaftServer.Leader()))
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}
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}
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}
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func (ms *MasterServer) startAdminScripts() {
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var err error
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v := util.GetViper()
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adminScripts := v.GetString("master.maintenance.scripts")
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glog.V(0).Infof("adminScripts:\n%v", adminScripts)
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if adminScripts == "" {
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return
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}
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v.SetDefault("master.maintenance.sleep_minutes", 17)
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sleepMinutes := v.GetInt("master.maintenance.sleep_minutes")
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v.SetDefault("master.filer.default_filer_url", "http://localhost:8888/")
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filerURL := v.GetString("master.filer.default_filer_url")
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scriptLines := strings.Split(adminScripts, "\n")
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masterAddress := "localhost:" + strconv.Itoa(ms.option.Port)
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var shellOptions shell.ShellOptions
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shellOptions.GrpcDialOption = security.LoadClientTLS(v, "grpc.master")
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shellOptions.Masters = &masterAddress
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shellOptions.FilerHost, shellOptions.FilerPort, shellOptions.Directory, err = util.ParseFilerUrl(filerURL)
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if err != nil {
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glog.V(0).Infof("failed to parse master.filer.default_filer_urll=%s : %v\n", filerURL, err)
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return
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}
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commandEnv := shell.NewCommandEnv(shellOptions)
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reg, _ := regexp.Compile(`'.*?'|".*?"|\S+`)
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go commandEnv.MasterClient.KeepConnectedToMaster()
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go func() {
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commandEnv.MasterClient.WaitUntilConnected()
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c := time.Tick(time.Duration(sleepMinutes) * time.Minute)
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for _ = range c {
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if ms.Topo.IsLeader() {
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for _, line := range scriptLines {
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cmds := reg.FindAllString(line, -1)
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if len(cmds) == 0 {
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continue
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}
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args := make([]string, len(cmds[1:]))
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for i := range args {
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args[i] = strings.Trim(string(cmds[1+i]), "\"'")
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}
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cmd := strings.ToLower(cmds[0])
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for _, c := range shell.Commands {
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if c.Name() == cmd {
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glog.V(0).Infof("executing: %s %v", cmd, args)
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if err := c.Do(args, commandEnv, os.Stdout); err != nil {
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glog.V(0).Infof("error: %v", err)
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}
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}
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}
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}
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}
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}
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}()
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}
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func (ms *MasterServer) createSequencer(option *MasterOption) sequence.Sequencer {
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var seq sequence.Sequencer
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v := util.GetViper()
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seqType := strings.ToLower(v.GetString(SequencerType))
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glog.V(1).Infof("[%s] : [%s]", SequencerType, seqType)
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switch strings.ToLower(seqType) {
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case "etcd":
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var err error
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urls := v.GetString(SequencerEtcdUrls)
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glog.V(0).Infof("[%s] : [%s]", SequencerEtcdUrls, urls)
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seq, err = sequence.NewEtcdSequencer(urls, option.MetaFolder)
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if err != nil {
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glog.Error(err)
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seq = nil
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}
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default:
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seq = sequence.NewMemorySequencer()
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}
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return seq
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}
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