feat(trasnport): add an independent node name
Don't let the raft algorithm know anything about the transport. Give it a nodename instead. This will allow us to support more complex networking setups in the future.release-0.4
Brandon Philips
parent
06fab60dd6
commit
a19048841f
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@ -45,7 +45,7 @@ func SetHttpHandler(w *http.ResponseWriter, req *http.Request) {
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return
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}
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debugf("[recv] POST http://%v/v1/keys/%s", raftServer.Name(), key)
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debugf("[recv] POST %v/v1/keys/%s", raftServer.Name(), key)
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value := req.FormValue("value")
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@ -96,7 +96,7 @@ func SetHttpHandler(w *http.ResponseWriter, req *http.Request) {
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func DeleteHttpHandler(w *http.ResponseWriter, req *http.Request) {
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key := req.URL.Path[len("/v1/keys/"):]
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debugf("[recv] DELETE http://%v/v1/keys/%s", raftServer.Name(), key)
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debugf("[recv] DELETE %v/v1/keys/%s", raftServer.Name(), key)
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command := &DeleteCommand{
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Key: key,
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@ -172,9 +172,9 @@ func dispatch(c Command, w *http.ResponseWriter, req *http.Request, client bool)
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if client {
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clientAddr, _ := getClientAddr(raftServer.Leader())
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url = scheme + clientAddr + path
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url = clientAddr + path
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} else {
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url = scheme + raftServer.Leader() + path
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url = raftServer.Leader() + path
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}
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debugf("Redirect to %s", url)
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@ -111,9 +111,8 @@ func (c *WatchCommand) Apply(server *raft.Server) (interface{}, error) {
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// JoinCommand
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type JoinCommand struct {
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Name string `json:"name"`
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Hostname string `json:"hostName"`
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RaftPort int `json:"raftPort"`
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ClientPort int `json:"clientPort"`
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RaftURL string `json:"raftURL"`
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ClientURL string `json:"clientURL"`
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}
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// The name of the join command in the log
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@ -137,12 +136,14 @@ func (c *JoinCommand) Apply(raftServer *raft.Server) (interface{}, error) {
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return []byte("join fail"), fmt.Errorf(errors[103])
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}
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raftTransporter.AddPeer(c)
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// add peer in raft
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err := raftServer.AddPeer(c.Name)
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// add machine in etcd storage
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key := path.Join("_etcd/machines", c.Name)
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value := fmt.Sprintf("%s,%d,%d", c.Hostname, c.RaftPort, c.ClientPort)
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value := fmt.Sprintf("server=%s&client=%s", c.RaftURL, c.ClientURL)
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etcdStore.Set(key, value, time.Unix(0, 0), raftServer.CommitIndex())
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return []byte("join success"), err
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90
etcd.go
90
etcd.go
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@ -56,13 +56,14 @@ func init() {
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flag.BoolVar(&verbose, "v", false, "verbose logging")
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flag.BoolVar(&veryVerbose, "vv", false, "very verbose logging")
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flag.StringVar(&machines, "C", "", "the ip address and port of a existing machines in the cluster, sepearate by comma")
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flag.StringVar(&machinesFile, "CF", "", "the file contains a list of existing machines in the cluster, seperate by comma")
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flag.StringVar(&argInfo.Hostname, "h", "0.0.0.0", "the hostname of the local machine")
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flag.IntVar(&argInfo.ClientPort, "c", 4001, "the port to communicate with clients")
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flag.IntVar(&argInfo.RaftPort, "s", 7001, "the port to communicate with servers")
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flag.IntVar(&argInfo.WebPort, "w", -1, "the port of web interface (-1 means do not start web interface)")
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flag.StringVar(&argInfo.Name, "n", "", "the node name (required)")
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flag.StringVar(&argInfo.ClientURL, "c", "127.0.0.1:4001", "the port to communicate with clients")
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flag.StringVar(&argInfo.RaftURL, "s", "127.0.0.1:7001", "the port to communicate with servers")
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flag.StringVar(&argInfo.WebURL, "w", "", "the port of web interface")
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flag.StringVar(&argInfo.ServerCAFile, "serverCAFile", "", "the path of the CAFile")
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flag.StringVar(&argInfo.ServerCertFile, "serverCert", "", "the cert file of the server")
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@ -111,10 +112,11 @@ const (
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//------------------------------------------------------------------------------
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type Info struct {
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Hostname string `json:"hostname"`
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RaftPort int `json:"raftPort"`
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ClientPort int `json:"clientPort"`
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WebPort int `json:"webPort"`
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Name string `json:"name"`
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RaftURL string `json:"raftURL"`
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ClientURL string `json:"clientURL"`
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WebURL string `json:"webURL"`
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ServerCertFile string `json:"serverCertFile"`
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ServerKeyFile string `json:"serverKeyFile"`
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@ -142,6 +144,21 @@ var info *Info
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//
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//------------------------------------------------------------------------------
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// Check a URL and clean it up if the user forgot the schema
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func checkURL(u string, defaultSchema string) string {
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p, err := url.Parse(u)
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if err != nil {
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panic(err)
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}
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if len(p.Host) == 0 && len(defaultSchema) != 0 {
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return checkURL(fmt.Sprintf("%s://%s", defaultSchema, u), "")
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}
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return p.String()
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}
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//--------------------------------------
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// Main
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//--------------------------------------
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@ -184,6 +201,16 @@ func main() {
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cluster = strings.Split(string(b), ",")
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}
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// Otherwise ask user for info and write it to file.
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argInfo.Name = strings.TrimSpace(argInfo.Name)
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if argInfo.Name == "" {
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fatal("Please give the name of the server")
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}
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argInfo.RaftURL = checkURL(argInfo.RaftURL, "http")
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argInfo.ClientURL = checkURL(argInfo.ClientURL, "http")
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// Setup commands.
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registerCommands()
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@ -209,11 +236,11 @@ func main() {
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startRaft(raftTlsConfs)
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if argInfo.WebPort != -1 {
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if argInfo.WebURL != "" {
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// start web
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etcdStore.SetMessager(storeMsg)
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go webHelper()
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go web.Start(raftServer, argInfo.WebPort)
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go web.Start(raftServer, argInfo.WebURL)
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}
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startEtcdTransport(*info, etcdTlsConfs[0])
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@ -224,7 +251,7 @@ func main() {
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func startRaft(tlsConfs []*tls.Config) {
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var err error
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raftName := fmt.Sprintf("%s:%d", info.Hostname, info.RaftPort)
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raftName := info.Name
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// Create transporter for raft
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raftTransporter = newTransporter(tlsConfs[1])
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@ -262,10 +289,9 @@ func startRaft(tlsConfs []*tls.Config) {
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// leader need to join self as a peer
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for {
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command := &JoinCommand{
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Name: raftServer.Name(),
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Hostname: argInfo.Hostname,
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RaftPort: argInfo.RaftPort,
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ClientPort: argInfo.ClientPort,
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Name: raftServer.Name(),
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RaftURL: argInfo.RaftURL,
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ClientURL: argInfo.ClientURL,
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}
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_, err := raftServer.Do(command)
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if err == nil {
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@ -333,6 +359,8 @@ func startRaft(tlsConfs []*tls.Config) {
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func newTransporter(tlsConf *tls.Config) transporter {
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t := transporter{}
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t.names = make(map[string]*JoinCommand)
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if tlsConf == nil {
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t.scheme = "http://"
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@ -366,6 +394,7 @@ func dialTimeout(network, addr string) (net.Conn, error) {
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func startRaftTransport(info Info, tlsConf *tls.Config) {
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// internal commands
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http.HandleFunc("/name", NameHttpHandler)
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http.HandleFunc("/join", JoinHttpHandler)
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http.HandleFunc("/vote", VoteHttpHandler)
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http.HandleFunc("/log", GetLogHttpHandler)
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@ -374,16 +403,16 @@ func startRaftTransport(info Info, tlsConf *tls.Config) {
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http.HandleFunc("/snapshotRecovery", SnapshotRecoveryHttpHandler)
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http.HandleFunc("/client", ClientHttpHandler)
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if tlsConf == nil {
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fmt.Printf("raft server [%s] listen on http port %v\n", info.Hostname, info.RaftPort)
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fatal(http.ListenAndServe(fmt.Sprintf(":%d", info.RaftPort), nil))
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u, _ := url.Parse(info.RaftURL)
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fmt.Printf("raft server [%s] listening on %s\n", info.Name, u)
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if tlsConf == nil {
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http.ListenAndServe(u.Host, nil)
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} else {
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server := &http.Server{
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TLSConfig: tlsConf,
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Addr: fmt.Sprintf(":%d", info.RaftPort),
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Addr: u.Host,
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}
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fmt.Printf("raft server [%s] listen on https port %v\n", info.Hostname, info.RaftPort)
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fatal(server.ListenAndServeTLS(info.ServerCertFile, argInfo.ServerKeyFile))
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}
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@ -400,15 +429,16 @@ func startEtcdTransport(info Info, tlsConf *tls.Config) {
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http.HandleFunc("/stats", StatsHttpHandler)
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http.HandleFunc("/test/", TestHttpHandler)
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u, _ := url.Parse(info.ClientURL)
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fmt.Printf("raft server [%s] listening on %s\n", info.Name, u)
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if tlsConf == nil {
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fmt.Printf("etcd [%s] listen on http port %v\n", info.Hostname, info.ClientPort)
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fatal(http.ListenAndServe(fmt.Sprintf(":%d", info.ClientPort), nil))
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fatal(http.ListenAndServe(u.Host, nil))
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} else {
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server := &http.Server{
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TLSConfig: tlsConf,
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Addr: fmt.Sprintf(":%d", info.ClientPort),
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Addr: u.Host,
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}
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fmt.Printf("etcd [%s] listen on https port %v\n", info.Hostname, info.ClientPort)
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fatal(server.ListenAndServeTLS(info.ClientCertFile, info.ClientKeyFile))
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}
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}
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@ -518,13 +548,6 @@ func getInfo(path string) *Info {
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return info
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}
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// Otherwise ask user for info and write it to file.
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argInfo.Hostname = strings.TrimSpace(argInfo.Hostname)
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if argInfo.Hostname == "" {
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fatal("Please give the address of the local machine")
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}
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info = &argInfo
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// Write to file.
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@ -567,9 +590,8 @@ func joinCluster(s *raft.Server, serverName string) error {
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command := &JoinCommand{
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Name: s.Name(),
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Hostname: info.Hostname,
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RaftPort: info.RaftPort,
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ClientPort: info.ClientPort,
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RaftURL: info.RaftURL,
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ClientURL: info.ClientURL,
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}
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json.NewEncoder(&b).Encode(command)
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@ -36,7 +36,7 @@ func TestKillLeader(t *testing.T) {
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leader := "127.0.0.1:7001"
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for i := 0; i < 10; i++ {
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for i := 0; i < clusterSize; i++ {
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port, _ := strconv.Atoi(strings.Split(leader, ":")[1])
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num := port - 7001
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fmt.Println("kill server ", num)
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12
machines.go
12
machines.go
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@ -1,20 +1,20 @@
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package main
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import (
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"fmt"
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"path"
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"strings"
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"net/url"
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)
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func getClientAddr(name string) (string, bool) {
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response, _ := etcdStore.RawGet(path.Join("_etcd/machines", name))
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values := strings.Split(response[0].Value, ",")
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m, err := url.ParseQuery(response[0].Value)
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hostname := values[0]
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clientPort := values[2]
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if err != nil {
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panic("Failed to parse machines entry")
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}
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addr := fmt.Sprintf("%s:%s", hostname, clientPort)
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addr := m["client"][0]
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return addr, true
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}
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@ -4,7 +4,6 @@ import (
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"encoding/json"
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"github.com/coreos/go-raft"
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"net/http"
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"strconv"
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)
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//-------------------------------------------------------------
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@ -91,7 +90,7 @@ func SnapshotRecoveryHttpHandler(w http.ResponseWriter, req *http.Request) {
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func ClientHttpHandler(w http.ResponseWriter, req *http.Request) {
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debugf("[recv] Get %s/client/ ", raftTransporter.scheme+raftServer.Name())
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w.WriteHeader(http.StatusOK)
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client := argInfo.Hostname + ":" + strconv.Itoa(argInfo.ClientPort)
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client := argInfo.ClientURL
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w.Write([]byte(client))
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}
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@ -108,3 +107,16 @@ func JoinHttpHandler(w http.ResponseWriter, req *http.Request) {
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return
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}
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}
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// Response to the join request
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func NameHttpHandler(w http.ResponseWriter, req *http.Request) {
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command := &JoinCommand{}
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if err := decodeJsonRequest(req, command); err == nil {
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debugf("Receive Join Request from %s", command.Name)
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dispatch(command, &w, req, false)
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} else {
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w.WriteHeader(http.StatusInternalServerError)
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return
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}
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}
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30
test.go
30
test.go
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@ -9,6 +9,7 @@ import (
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"os"
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"strconv"
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"time"
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"net/url"
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)
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var client = http.Client{
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@ -59,10 +60,10 @@ func createCluster(size int, procAttr *os.ProcAttr) ([][]string, []*os.Process,
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argGroup := make([][]string, size)
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for i := 0; i < size; i++ {
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if i == 0 {
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argGroup[i] = []string{"etcd", "-h=127.0.0.1", "-d=/tmp/node1"}
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argGroup[i] = []string{"etcd", "-d=/tmp/node1", "-n=node1", "-vv"}
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} else {
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strI := strconv.Itoa(i + 1)
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argGroup[i] = []string{"etcd", "-h=127.0.0.1", "-c=400" + strI, "-s=700" + strI, "-d=/tmp/node" + strI, "-C=127.0.0.1:7001"}
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argGroup[i] = []string{"etcd", "-n=node" + strI, "-c=127.0.0.1:400" + strI, "-s=127.0.0.1:700" + strI, "-d=/tmp/node" + strI, "-C=http://127.0.0.1:7001"}
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}
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}
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@ -103,7 +104,7 @@ func destroyCluster(etcds []*os.Process) error {
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//
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func leaderMonitor(size int, allowDeadNum int, leaderChan chan string) {
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leaderMap := make(map[int]string)
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baseAddrFormat := "http://0.0.0.0:400%d/leader"
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baseAddrFormat := "http://0.0.0.0:400%d"
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for {
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knownLeader := "unknown"
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@ -151,7 +152,7 @@ func leaderMonitor(size int, allowDeadNum int, leaderChan chan string) {
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func getLeader(addr string) (string, error) {
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resp, err := client.Get(addr)
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resp, err := client.Get(addr + "/leader")
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if err != nil {
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return "", err
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@ -163,14 +164,31 @@ func getLeader(addr string) (string, error) {
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}
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b, err := ioutil.ReadAll(resp.Body)
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resp.Body.Close()
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c := etcd.NewClient()
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path := "/_etcd/machines/" + string(b)
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fmt.Println(path)
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fmt.Println(addr)
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response, err := c.GetFrom(path, addr)
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fmt.Println(response)
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if err != nil {
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return "", err
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}
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m, err := url.ParseQuery(response[0].Value)
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if err != nil {
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panic("Failed to parse machines entry")
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}
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addr = m["server"][0]
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if err != nil {
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return "", err
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}
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return string(b), nil
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return addr, nil
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}
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@ -15,6 +15,19 @@ type transporter struct {
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client *http.Client
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// scheme
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scheme string
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names map[string]*JoinCommand
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}
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func (t transporter) NameToRaftURL(name string) string {
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return t.names[name].RaftURL
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}
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func (t transporter) NameToClientURL(name string) string {
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return t.names[name].ClientURL
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}
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func (t transporter) AddPeer(jc *JoinCommand) {
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t.names[jc.Name] = jc
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}
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// Sends AppendEntries RPCs to a peer when the server is the leader.
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@ -23,12 +36,13 @@ func (t transporter) SendAppendEntriesRequest(server *raft.Server, peer *raft.Pe
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var b bytes.Buffer
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json.NewEncoder(&b).Encode(req)
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debugf("Send LogEntries to %s ", peer.Name())
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u := t.NameToRaftURL(peer.Name())
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debugf("Send LogEntries to %s ", u)
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resp, err := t.Post(fmt.Sprintf("%s/log/append", peer.Name()), &b)
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resp, err := t.Post(fmt.Sprintf("%s/log/append", u), &b)
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if err != nil {
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debugf("Cannot send AppendEntriesRequest to %s : %s", peer.Name(), err)
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debugf("Cannot send AppendEntriesRequest to %s: %s", u, err)
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}
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if resp != nil {
|
||||
|
|
@ -48,12 +62,13 @@ func (t transporter) SendVoteRequest(server *raft.Server, peer *raft.Peer, req *
|
|||
var b bytes.Buffer
|
||||
json.NewEncoder(&b).Encode(req)
|
||||
|
||||
debugf("Send Vote to %s", peer.Name())
|
||||
u := t.NameToRaftURL(peer.Name())
|
||||
debugf("Send Vote to %s", u)
|
||||
|
||||
resp, err := t.Post(fmt.Sprintf("%s/vote", peer.Name()), &b)
|
||||
resp, err := t.Post(fmt.Sprintf("%s/vote", u), &b)
|
||||
|
||||
if err != nil {
|
||||
debugf("Cannot send VoteRequest to %s : %s", peer.Name(), err)
|
||||
debugf("Cannot send VoteRequest to %s : %s", u, err)
|
||||
}
|
||||
|
||||
if resp != nil {
|
||||
|
|
@ -73,10 +88,11 @@ func (t transporter) SendSnapshotRequest(server *raft.Server, peer *raft.Peer, r
|
|||
var b bytes.Buffer
|
||||
json.NewEncoder(&b).Encode(req)
|
||||
|
||||
debugf("Send Snapshot to %s [Last Term: %d, LastIndex %d]", peer.Name(),
|
||||
u := t.NameToRaftURL(peer.Name())
|
||||
debugf("Send Snapshot to %s [Last Term: %d, LastIndex %d]", u,
|
||||
req.LastTerm, req.LastIndex)
|
||||
|
||||
resp, err := t.Post(fmt.Sprintf("%s/snapshot", peer.Name()), &b)
|
||||
resp, err := t.Post(fmt.Sprintf("%s/snapshot", u), &b)
|
||||
|
||||
if resp != nil {
|
||||
defer resp.Body.Close()
|
||||
|
|
@ -95,10 +111,11 @@ func (t transporter) SendSnapshotRecoveryRequest(server *raft.Server, peer *raft
|
|||
var b bytes.Buffer
|
||||
json.NewEncoder(&b).Encode(req)
|
||||
|
||||
debugf("Send SnapshotRecovery to %s [Last Term: %d, LastIndex %d]", peer.Name(),
|
||||
u := t.NameToRaftURL(peer.Name())
|
||||
debugf("Send SnapshotRecovery to %s [Last Term: %d, LastIndex %d]", u,
|
||||
req.LastTerm, req.LastIndex)
|
||||
|
||||
resp, err := t.Post(fmt.Sprintf("%s/snapshotRecovery", peer.Name()), &b)
|
||||
resp, err := t.Post(fmt.Sprintf("%s/snapshotRecovery", u), &b)
|
||||
|
||||
if resp != nil {
|
||||
defer resp.Body.Close()
|
||||
|
|
@ -123,12 +140,12 @@ func (t transporter) GetLeaderClientAddress() string {
|
|||
|
||||
// Send server side POST request
|
||||
func (t transporter) Post(path string, body io.Reader) (*http.Response, error) {
|
||||
resp, err := t.client.Post(t.scheme+path, "application/json", body)
|
||||
resp, err := t.client.Post(path, "application/json", body)
|
||||
return resp, err
|
||||
}
|
||||
|
||||
// Send server side GET request
|
||||
func (t transporter) Get(path string) (*http.Response, error) {
|
||||
resp, err := t.client.Get(t.scheme + path)
|
||||
resp, err := t.client.Get(path)
|
||||
return resp, err
|
||||
}
|
||||
|
|
|
|||
|
|
@ -24,7 +24,8 @@ func mainHandler(c http.ResponseWriter, req *http.Request) {
|
|||
mainTempl.Execute(c, p)
|
||||
}
|
||||
|
||||
func Start(server *raft.Server, port int) {
|
||||
func Start(server *raft.Server, webURL string) {
|
||||
port := "4002"
|
||||
mainTempl = template.Must(template.New("index.html").Parse(index_html))
|
||||
s = server
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue