seaweedfs/weed/server/master_server.go

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package weed_server
import (
"context"
"fmt"
"net/http"
"net/http/httputil"
"net/url"
"os"
"regexp"
"strings"
"sync"
"time"
"github.com/seaweedfs/seaweedfs/weed/stats"
"github.com/seaweedfs/seaweedfs/weed/cluster"
"github.com/seaweedfs/seaweedfs/weed/pb"
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"github.com/gorilla/mux"
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hashicorpRaft "github.com/hashicorp/raft"
"github.com/seaweedfs/raft"
"google.golang.org/grpc"
"github.com/seaweedfs/seaweedfs/weed/glog"
"github.com/seaweedfs/seaweedfs/weed/pb/master_pb"
"github.com/seaweedfs/seaweedfs/weed/security"
"github.com/seaweedfs/seaweedfs/weed/sequence"
"github.com/seaweedfs/seaweedfs/weed/shell"
"github.com/seaweedfs/seaweedfs/weed/topology"
"github.com/seaweedfs/seaweedfs/weed/util"
"github.com/seaweedfs/seaweedfs/weed/wdclient"
)
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const (
SequencerType = "master.sequencer.type"
SequencerSnowflakeId = "master.sequencer.sequencer_snowflake_id"
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)
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type MasterOption struct {
Master pb.ServerAddress
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MetaFolder string
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VolumeSizeLimitMB uint32
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VolumePreallocate bool
// PulseSeconds int
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DefaultReplicaPlacement string
GarbageThreshold float64
WhiteList []string
DisableHttp bool
MetricsAddress string
MetricsIntervalSec int
IsFollower bool
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}
type MasterServer struct {
master_pb.UnimplementedSeaweedServer
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option *MasterOption
guard *security.Guard
preallocateSize int64
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Topo *topology.Topology
vg *topology.VolumeGrowth
vgCh chan *topology.VolumeGrowRequest
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boundedLeaderChan chan int
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// notifying clients
clientChansLock sync.RWMutex
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clientChans map[string]chan *master_pb.KeepConnectedResponse
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grpcDialOption grpc.DialOption
MasterClient *wdclient.MasterClient
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adminLocks *AdminLocks
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Cluster *cluster.Cluster
}
func NewMasterServer(r *mux.Router, option *MasterOption, peers map[string]pb.ServerAddress) *MasterServer {
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v := util.GetViper()
signingKey := v.GetString("jwt.signing.key")
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v.SetDefault("jwt.signing.expires_after_seconds", 10)
expiresAfterSec := v.GetInt("jwt.signing.expires_after_seconds")
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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")
v.SetDefault("master.replication.treat_replication_as_minimums", false)
replicationAsMin := v.GetBool("master.replication.treat_replication_as_minimums")
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v.SetDefault("master.volume_growth.copy_1", 7)
v.SetDefault("master.volume_growth.copy_2", 6)
v.SetDefault("master.volume_growth.copy_3", 3)
v.SetDefault("master.volume_growth.copy_other", 1)
v.SetDefault("master.volume_growth.threshold", 0.9)
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var preallocateSize int64
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if option.VolumePreallocate {
preallocateSize = int64(option.VolumeSizeLimitMB) * (1 << 20)
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}
grpcDialOption := security.LoadClientTLS(v, "grpc.master")
ms := &MasterServer{
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option: option,
preallocateSize: preallocateSize,
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vgCh: make(chan *topology.VolumeGrowRequest, 1<<6),
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clientChans: make(map[string]chan *master_pb.KeepConnectedResponse),
grpcDialOption: grpcDialOption,
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MasterClient: wdclient.NewMasterClient(grpcDialOption, "", cluster.MasterType, option.Master, "", "", peers),
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adminLocks: NewAdminLocks(),
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Cluster: cluster.NewCluster(),
}
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ms.boundedLeaderChan = make(chan int, 16)
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ms.MasterClient.SetOnPeerUpdateFn(ms.OnPeerUpdate)
seq := ms.createSequencer(option)
if nil == seq {
glog.Fatalf("create sequencer failed.")
}
ms.Topo = topology.NewTopology("topo", seq, uint64(ms.option.VolumeSizeLimitMB)*1024*1024, 5, replicationAsMin)
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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handleStaticResources2(r)
r.HandleFunc("/", ms.proxyToLeader(ms.uiStatusHandler))
r.HandleFunc("/ui/index.html", ms.uiStatusHandler)
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if !ms.option.DisableHttp {
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))
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/*
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)
}
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ms.Topo.StartRefreshWritableVolumes(
ms.grpcDialOption,
ms.option.GarbageThreshold,
v.GetFloat64("master.volume_growth.threshold"),
ms.preallocateSize,
)
ms.ProcessGrowRequest()
if !option.IsFollower {
ms.startAdminScripts()
}
return ms
}
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func (ms *MasterServer) SetRaftServer(raftServer *RaftServer) {
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var raftServerName string
ms.Topo.RaftServerAccessLock.Lock()
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if raftServer.raftServer != nil {
ms.Topo.RaftServer = raftServer.raftServer
ms.Topo.RaftServer.AddEventListener(raft.LeaderChangeEventType, func(e raft.Event) {
glog.V(0).Infof("leader change event: %+v => %+v", e.PrevValue(), e.Value())
stats.MasterLeaderChangeCounter.WithLabelValues(fmt.Sprintf("%+v", e.Value())).Inc()
if ms.Topo.RaftServer.Leader() != "" {
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glog.V(0).Infof("[%s] %s becomes leader.", ms.Topo.RaftServer.Name(), ms.Topo.RaftServer.Leader())
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}
})
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raftServerName = fmt.Sprintf("[%s]", ms.Topo.RaftServer.Name())
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} else if raftServer.RaftHashicorp != nil {
ms.Topo.HashicorpRaft = raftServer.RaftHashicorp
leaderCh := raftServer.RaftHashicorp.LeaderCh()
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prevLeader, _ := ms.Topo.HashicorpRaft.LeaderWithID()
raftServerName = ms.Topo.HashicorpRaft.String()
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go func() {
for {
select {
case isLeader := <-leaderCh:
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ms.Topo.RaftServerAccessLock.RLock()
leader, _ := ms.Topo.HashicorpRaft.LeaderWithID()
ms.Topo.RaftServerAccessLock.RUnlock()
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glog.V(0).Infof("is leader %+v change event: %+v => %+v", isLeader, prevLeader, leader)
stats.MasterLeaderChangeCounter.WithLabelValues(fmt.Sprintf("%+v", leader)).Inc()
prevLeader = leader
}
}
}()
}
ms.Topo.RaftServerAccessLock.Unlock()
if ms.Topo.IsLeader() {
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glog.V(0).Infof("%s I am the leader!", raftServerName)
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} else {
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var raftServerLeader string
ms.Topo.RaftServerAccessLock.RLock()
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if ms.Topo.RaftServer != nil {
raftServerLeader = ms.Topo.RaftServer.Leader()
} else if ms.Topo.HashicorpRaft != nil {
raftServerName = ms.Topo.HashicorpRaft.String()
raftServerLeaderAddr, _ := ms.Topo.HashicorpRaft.LeaderWithID()
raftServerLeader = string(raftServerLeaderAddr)
}
ms.Topo.RaftServerAccessLock.RUnlock()
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glog.V(0).Infof("%s %s - is the leader.", raftServerName, raftServerLeader)
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}
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}
func (ms *MasterServer) proxyToLeader(f http.HandlerFunc) http.HandlerFunc {
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return func(w http.ResponseWriter, r *http.Request) {
if ms.Topo.IsLeader() {
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f(w, r)
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return
}
// get the current raft leader
leaderAddr, _ := ms.Topo.MaybeLeader()
raftServerLeader := leaderAddr.ToHttpAddress()
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if raftServerLeader == "" {
f(w, r)
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return
}
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ms.boundedLeaderChan <- 1
defer func() { <-ms.boundedLeaderChan }()
targetUrl, err := url.Parse("http://" + raftServerLeader)
if err != nil {
writeJsonError(w, r, http.StatusInternalServerError,
fmt.Errorf("Leader URL http://%s Parse Error: %v", raftServerLeader, err))
return
}
// proxy to leader
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glog.V(4).Infoln("proxying to leader", raftServerLeader)
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)
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}
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proxy.Transport = util.Transport
proxy.ServeHTTP(w, r)
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}
}
func (ms *MasterServer) startAdminScripts() {
v := util.GetViper()
adminScripts := v.GetString("master.maintenance.scripts")
if adminScripts == "" {
return
}
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glog.V(0).Infof("adminScripts: %v", adminScripts)
v.SetDefault("master.maintenance.sleep_minutes", 17)
sleepMinutes := v.GetInt("master.maintenance.sleep_minutes")
scriptLines := strings.Split(adminScripts, "\n")
if !strings.Contains(adminScripts, "lock") {
scriptLines = append(append([]string{}, "lock"), scriptLines...)
scriptLines = append(scriptLines, "unlock")
}
masterAddress := string(ms.option.Master)
var shellOptions shell.ShellOptions
shellOptions.GrpcDialOption = security.LoadClientTLS(v, "grpc.master")
shellOptions.Masters = &masterAddress
shellOptions.Directory = "/"
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emptyFilerGroup := ""
shellOptions.FilerGroup = &emptyFilerGroup
commandEnv := shell.NewCommandEnv(&shellOptions)
reg, _ := regexp.Compile(`'.*?'|".*?"|\S+`)
go commandEnv.MasterClient.KeepConnectedToMaster()
go func() {
for {
time.Sleep(time.Duration(sleepMinutes) * time.Minute)
if ms.Topo.IsLeader() && ms.MasterClient.GetMaster() != "" {
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shellOptions.FilerAddress = ms.GetOneFiler(cluster.FilerGroupName(*shellOptions.FilerGroup))
if shellOptions.FilerAddress == "" {
continue
}
for _, line := range scriptLines {
for _, c := range strings.Split(line, ";") {
processEachCmd(reg, c, commandEnv)
}
}
}
}
}()
}
func processEachCmd(reg *regexp.Regexp, line string, commandEnv *shell.CommandEnv) {
cmds := reg.FindAllString(line, -1)
if len(cmds) == 0 {
return
}
args := make([]string, len(cmds[1:]))
for i := range args {
args[i] = strings.Trim(string(cmds[1+i]), "\"'")
}
cmd := 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)
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switch strings.ToLower(seqType) {
case "snowflake":
var err error
snowflakeId := v.GetInt(SequencerSnowflakeId)
seq, err = sequence.NewSnowflakeSequencer(string(option.Master), snowflakeId)
if err != nil {
glog.Error(err)
seq = nil
}
default:
seq = sequence.NewMemorySequencer()
}
return seq
}
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func (ms *MasterServer) OnPeerUpdate(update *master_pb.ClusterNodeUpdate, startFrom time.Time) {
ms.Topo.RaftServerAccessLock.RLock()
defer ms.Topo.RaftServerAccessLock.RUnlock()
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if update.NodeType != cluster.MasterType || ms.Topo.HashicorpRaft == nil {
return
}
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glog.V(4).Infof("OnPeerUpdate: %+v", update)
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peerAddress := pb.ServerAddress(update.Address)
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peerName := string(peerAddress)
if ms.Topo.HashicorpRaft.State() != hashicorpRaft.Leader {
return
}
if update.IsAdd {
raftServerFound := false
for _, server := range ms.Topo.HashicorpRaft.GetConfiguration().Configuration().Servers {
if string(server.ID) == peerName {
raftServerFound = true
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}
}
if !raftServerFound {
glog.V(0).Infof("adding new raft server: %s", peerName)
ms.Topo.HashicorpRaft.AddVoter(
hashicorpRaft.ServerID(peerName),
hashicorpRaft.ServerAddress(peerAddress.ToGrpcAddress()), 0, 0)
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}
} else {
pb.WithMasterClient(false, peerAddress, ms.grpcDialOption, true, func(client master_pb.SeaweedClient) error {
ctx, cancel := context.WithTimeout(context.TODO(), 15*time.Second)
defer cancel()
if _, err := client.Ping(ctx, &master_pb.PingRequest{Target: string(peerAddress), TargetType: cluster.MasterType}); err != nil {
glog.V(0).Infof("master %s didn't respond to pings. remove raft server", peerName)
if err := ms.MasterClient.WithClient(false, func(client master_pb.SeaweedClient) error {
_, err := client.RaftRemoveServer(context.Background(), &master_pb.RaftRemoveServerRequest{
Id: peerName,
Force: false,
})
return err
}); err != nil {
glog.Warningf("failed removing old raft server: %v", err)
return err
}
} else {
glog.V(0).Infof("master %s successfully responded to ping", peerName)
}
return nil
})
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}
}
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func (ms *MasterServer) Shutdown() {
if ms.Topo == nil || ms.Topo.HashicorpRaft == nil {
return
}
if ms.Topo.HashicorpRaft.State() == hashicorpRaft.Leader {
ms.Topo.HashicorpRaft.LeadershipTransfer()
}
ms.Topo.HashicorpRaft.Shutdown()
}