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Clean raft configurations if "peers" option is set.

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This commit is contained in:
Chris Lu 2014-10-27 01:09:45 -07:00
parent 179d36ba0e
commit 7ce628bf09
1 changed files with 25 additions and 21 deletions
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46
go/weed/weed_server/raft_server.go
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@ -9,6 +9,8 @@ import (
"math/rand" "math/rand"
"net/http" "net/http"
"net/url" "net/url"
"os"
"path"
"strings" "strings"
"time" "time"
@ -46,6 +48,13 @@ func NewRaftServer(r *mux.Router, peers []string, httpAddr string, dataDir strin
transporter := raft.NewHTTPTransporter("/cluster", 0) transporter := raft.NewHTTPTransporter("/cluster", 0)
transporter.Transport.MaxIdleConnsPerHost = 1024 transporter.Transport.MaxIdleConnsPerHost = 1024
// Clear old cluster configurations if peers are set
if len(s.peers) > 0 {
os.RemoveAll(path.Join(s.dataDir, "conf"))
os.RemoveAll(path.Join(s.dataDir, "log"))
os.RemoveAll(path.Join(s.dataDir, "snapshot"))
}
s.raftServer, err = raft.NewServer(s.httpAddr, s.dataDir, transporter, nil, topo, "") s.raftServer, err = raft.NewServer(s.httpAddr, s.dataDir, transporter, nil, topo, "")
if err != nil { if err != nil {
glog.V(0).Infoln(err) glog.V(0).Infoln(err)
@ -53,35 +62,30 @@ func NewRaftServer(r *mux.Router, peers []string, httpAddr string, dataDir strin
} }
transporter.Install(s.raftServer, s) transporter.Install(s.raftServer, s)
s.raftServer.SetHeartbeatInterval(1 * time.Second) s.raftServer.SetHeartbeatInterval(1 * time.Second)
s.raftServer.SetElectionTimeout(time.Duration(pulseSeconds) * 1150 * time.Millisecond) s.raftServer.SetElectionTimeout(time.Duration(pulseSeconds) * 3450 * time.Millisecond)
s.raftServer.Start() s.raftServer.Start()
s.router.HandleFunc("/cluster/join", s.joinHandler).Methods("POST") s.router.HandleFunc("/cluster/join", s.joinHandler).Methods("POST")
s.router.HandleFunc("/cluster/status", s.statusHandler).Methods("GET") s.router.HandleFunc("/cluster/status", s.statusHandler).Methods("GET")
// Join to leader if specified.
if len(s.peers) > 0 { if len(s.peers) > 0 {
if !s.raftServer.IsLogEmpty() { // Join to leader if specified.
glog.V(0).Infoln("Starting cluster with existing logs.") glog.V(0).Infoln("Joining cluster:", strings.Join(s.peers, ","))
} else { time.Sleep(time.Duration(rand.Intn(1000)) * time.Millisecond)
glog.V(0).Infoln("Joining cluster:", strings.Join(s.peers, ",")) firstJoinError := s.Join(s.peers)
time.Sleep(time.Duration(rand.Intn(1000)) * time.Millisecond) if firstJoinError != nil {
firstJoinError := s.Join(s.peers) glog.V(0).Infoln("No existing server found. Starting as leader in the new cluster.")
if firstJoinError != nil { _, err := s.raftServer.Do(&raft.DefaultJoinCommand{
glog.V(0).Infoln("No existing server found. Starting as leader in the new cluster.") Name: s.raftServer.Name(),
_, err := s.raftServer.Do(&raft.DefaultJoinCommand{ ConnectionString: "http://" + s.httpAddr,
Name: s.raftServer.Name(), })
ConnectionString: "http://" + s.httpAddr, if err != nil {
}) glog.V(0).Infoln(err)
if err != nil { return nil
glog.V(0).Infoln(err)
return nil
}
} }
} }
// Initialize the server by joining itself.
} else if s.raftServer.IsLogEmpty() { } else if s.raftServer.IsLogEmpty() {
// Initialize the server by joining itself.
glog.V(0).Infoln("Initializing new cluster") glog.V(0).Infoln("Initializing new cluster")
_, err := s.raftServer.Do(&raft.DefaultJoinCommand{ _, err := s.raftServer.Do(&raft.DefaultJoinCommand{
@ -95,7 +99,7 @@ func NewRaftServer(r *mux.Router, peers []string, httpAddr string, dataDir strin
} }
} else { } else {
glog.V(0).Infoln("Recovered from log") glog.V(0).Infoln("Old conf,log,snapshot should have been removed.")
} }
return s return s