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toughen weedfs clustering, adding synchronizing max volume id among

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peers in order to avoid the same volume id being assigned twice
1. moving raft.Server to topology
2. adding max volume id command for raft
This commit is contained in:
Chris Lu
2014-03-15 23:03:49 -07:00
parent fb75fe852c
commit 41143b3b78
9 changed files with 114 additions and 72 deletions
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30
go/weed/weed_server/raft_server.go
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@@ -3,6 +3,7 @@ package weed_server
import (
"bytes"
"code.google.com/p/weed-fs/go/glog"
"code.google.com/p/weed-fs/go/topology"
"encoding/json"
"errors"
"fmt"
@@ -22,31 +23,35 @@ type RaftServer struct {
httpAddr string
version string
router *mux.Router
topo *topology.Topology
}
func NewRaftServer(r *mux.Router, version string, peers []string, httpAddr string, dataDir string) *RaftServer {
func NewRaftServer(r *mux.Router, version string, peers []string, httpAddr string, dataDir string, topo *topology.Topology, pulseSeconds int) *RaftServer {
s := &RaftServer{
version: version,
peers: peers,
httpAddr: httpAddr,
dataDir: dataDir,
router: r,
topo: topo,
}
if glog.V(4) {
raft.SetLogLevel(2)
}
raft.RegisterCommand(&topology.MaxVolumeIdCommand{})
var err error
transporter := raft.NewHTTPTransporter("/cluster")
s.raftServer, err = raft.NewServer(s.httpAddr, s.dataDir, transporter, nil, nil, "")
s.raftServer, err = raft.NewServer(s.httpAddr, s.dataDir, transporter, nil, topo, "")
if err != nil {
glog.V(0).Infoln(err)
return nil
}
transporter.Install(s.raftServer, s)
s.raftServer.SetHeartbeatInterval(1 * time.Second)
s.raftServer.SetElectionTimeout(1500 * time.Millisecond)
s.raftServer.SetElectionTimeout(time.Duration(pulseSeconds) * 1150 * time.Millisecond)
s.raftServer.Start()
s.router.HandleFunc("/cluster/join", s.joinHandler).Methods("POST")
@@ -86,25 +91,6 @@ func NewRaftServer(r *mux.Router, version string, peers []string, httpAddr strin
return s
}
func (s *RaftServer) Name() string {
return s.raftServer.Name()
}
func (s *RaftServer) IsLeader() bool {
return s.Leader() == s.raftServer.Name()
}
func (s *RaftServer) Leader() string {
l := s.raftServer.Leader()
if l == "" {
// We are a single node cluster, we are the leader
return s.raftServer.Name()
}
return l
}
func (s *RaftServer) Peers() (members []string) {
peers := s.raftServer.Peers()