package main import ( "code.google.com/p/weed-fs/go/operation" "code.google.com/p/weed-fs/go/replication" "code.google.com/p/weed-fs/go/storage" "log" "math/rand" "mime" "net/http" "os" "runtime" "strconv" "strings" "time" ) func init() { cmdVolume.Run = runVolume // break init cycle cmdVolume.IsDebug = cmdVolume.Flag.Bool("debug", false, "enable debug mode") } var cmdVolume = &Command{ UsageLine: "volume -port=8080 -dir=/tmp -max=5 -ip=server_name -mserver=localhost:9333", Short: "start a volume server", Long: `start a volume server to provide storage spaces `, } var ( vport = cmdVolume.Flag.Int("port", 8080, "http listen port") volumeFolder = cmdVolume.Flag.String("dir", "/tmp", "directory to store data files") ip = cmdVolume.Flag.String("ip", "localhost", "ip or server name") publicUrl = cmdVolume.Flag.String("publicUrl", "", "Publicly accessible :") masterNode = cmdVolume.Flag.String("mserver", "localhost:9333", "master server location") vpulse = cmdVolume.Flag.Int("pulseSeconds", 5, "number of seconds between heartbeats, must be smaller than the master's setting") maxVolumeCount = cmdVolume.Flag.Int("max", 7, "maximum number of volumes") vReadTimeout = cmdVolume.Flag.Int("readTimeout", 3, "connection read timeout in seconds") vMaxCpu = cmdVolume.Flag.Int("maxCpu", 0, "maximum number of CPUs. 0 means all available CPUs") dataCenter = cmdVolume.Flag.String("dataCenter", "", "current volume server's data center name") rack = cmdVolume.Flag.String("rack", "", "current volume server's rack name") store *storage.Store ) var fileNameEscaper = strings.NewReplacer("\\", "\\\\", "\"", "\\\"") func statusHandler(w http.ResponseWriter, r *http.Request) { m := make(map[string]interface{}) m["Version"] = VERSION m["Volumes"] = store.Status() writeJsonQuiet(w, r, m) } func assignVolumeHandler(w http.ResponseWriter, r *http.Request) { err := store.AddVolume(r.FormValue("volume"), r.FormValue("replicationType")) if err == nil { writeJsonQuiet(w, r, map[string]string{"error": ""}) } else { writeJsonQuiet(w, r, map[string]string{"error": err.Error()}) } debug("assign volume =", r.FormValue("volume"), ", replicationType =", r.FormValue("replicationType"), ", error =", err) } func vacuumVolumeCheckHandler(w http.ResponseWriter, r *http.Request) { err, ret := store.CheckCompactVolume(r.FormValue("volume"), r.FormValue("garbageThreshold")) if err == nil { writeJsonQuiet(w, r, map[string]interface{}{"error": "", "result": ret}) } else { writeJsonQuiet(w, r, map[string]interface{}{"error": err.Error(), "result": false}) } debug("checked compacting volume =", r.FormValue("volume"), "garbageThreshold =", r.FormValue("garbageThreshold"), "vacuum =", ret) } func vacuumVolumeCompactHandler(w http.ResponseWriter, r *http.Request) { err := store.CompactVolume(r.FormValue("volume")) if err == nil { writeJsonQuiet(w, r, map[string]string{"error": ""}) } else { writeJsonQuiet(w, r, map[string]string{"error": err.Error()}) } debug("compacted volume =", r.FormValue("volume"), ", error =", err) } func vacuumVolumeCommitHandler(w http.ResponseWriter, r *http.Request) { err := store.CommitCompactVolume(r.FormValue("volume")) if err == nil { writeJsonQuiet(w, r, map[string]interface{}{"error": ""}) } else { writeJsonQuiet(w, r, map[string]string{"error": err.Error()}) } debug("commit compact volume =", r.FormValue("volume"), ", error =", err) } func freezeVolumeHandler(w http.ResponseWriter, r *http.Request) { //TODO: notify master that this volume will be read-only err := store.FreezeVolume(r.FormValue("volume")) if err == nil { writeJsonQuiet(w, r, map[string]interface{}{"error": ""}) } else { writeJsonQuiet(w, r, map[string]string{"error": err.Error()}) } debug("freeze volume =", r.FormValue("volume"), ", error =", err) } func storeHandler(w http.ResponseWriter, r *http.Request) { switch r.Method { case "GET": GetOrHeadHandler(w, r, true) case "HEAD": GetOrHeadHandler(w, r, false) case "DELETE": DeleteHandler(w, r) case "POST": PostHandler(w, r) } } func GetOrHeadHandler(w http.ResponseWriter, r *http.Request, isGetMethod bool) { n := new(storage.Needle) vid, fid, ext := parseURLPath(r.URL.Path) volumeId, err := storage.NewVolumeId(vid) if err != nil { debug("parsing error:", err, r.URL.Path) return } n.ParsePath(fid) debug("volume", volumeId, "reading", n) if !store.HasVolume(volumeId) { lookupResult, err := operation.Lookup(*masterNode, volumeId) debug("volume", volumeId, "found on", lookupResult, "error", err) if err == nil { http.Redirect(w, r, "http://"+lookupResult.Locations[0].PublicUrl+r.URL.Path, http.StatusMovedPermanently) } else { debug("lookup error:", err, r.URL.Path) w.WriteHeader(http.StatusNotFound) } return } cookie := n.Cookie count, e := store.Read(volumeId, n) debug("read bytes", count, "error", e) if e != nil || count <= 0 { debug("read error:", e, r.URL.Path) w.WriteHeader(http.StatusNotFound) return } if n.Cookie != cookie { log.Println("request with unmaching cookie from ", r.RemoteAddr, "agent", r.UserAgent()) w.WriteHeader(http.StatusNotFound) return } if n.LastModified != 0 { w.Header().Set("Last-Modified", time.Unix(int64(n.LastModified), 0).UTC().Format(http.TimeFormat)) if r.Header.Get("If-Modified-Since") != "" { if t, parseError := time.Parse(http.TimeFormat, r.Header.Get("If-Modified-Since")); parseError == nil { if t.Unix() >= int64(n.LastModified) { w.WriteHeader(http.StatusNotModified) return } } } } if n.NameSize > 0 { fname := string(n.Name) dotIndex := strings.LastIndex(fname, ".") if dotIndex > 0 { ext = fname[dotIndex:] } } mtype := "" if ext != "" { mtype = mime.TypeByExtension(ext) } if n.MimeSize > 0 { mtype = string(n.Mime) } if mtype != "" { w.Header().Set("Content-Type", mtype) } if n.NameSize > 0 { w.Header().Set("Content-Disposition", "filename="+fileNameEscaper.Replace(string(n.Name))) } if ext != ".gz" { if n.IsGzipped() { if strings.Contains(r.Header.Get("Accept-Encoding"), "gzip") { w.Header().Set("Content-Encoding", "gzip") } else { if n.Data, err = storage.UnGzipData(n.Data); err != nil { debug("lookup error:", err, r.URL.Path) } } } } w.Header().Set("Content-Length", strconv.Itoa(len(n.Data))) if isGetMethod { if _, e = w.Write(n.Data); e != nil { debug("response write error:", e) } } } func PostHandler(w http.ResponseWriter, r *http.Request) { if e := r.ParseForm(); e != nil { debug("form parse error:", e) writeJsonQuiet(w, r, e) return } vid, _, _ := parseURLPath(r.URL.Path) volumeId, e := storage.NewVolumeId(vid) if e != nil { debug("NewVolumeId error:", e) writeJsonQuiet(w, r, e) return } if e != nil { writeJsonQuiet(w, r, e) } else { needle, ne := storage.NewNeedle(r) if ne != nil { writeJsonQuiet(w, r, ne) } else { ret, errorStatus := replication.ReplicatedWrite(*masterNode, store, volumeId, needle, r) m := make(map[string]interface{}) if errorStatus == "" { w.WriteHeader(http.StatusCreated) } else { w.WriteHeader(http.StatusInternalServerError) m["error"] = errorStatus } m["size"] = ret writeJsonQuiet(w, r, m) } } } func DeleteHandler(w http.ResponseWriter, r *http.Request) { n := new(storage.Needle) vid, fid, _ := parseURLPath(r.URL.Path) volumeId, _ := storage.NewVolumeId(vid) n.ParsePath(fid) debug("deleting", n) cookie := n.Cookie count, ok := store.Read(volumeId, n) if ok != nil { m := make(map[string]uint32) m["size"] = 0 writeJsonQuiet(w, r, m) return } if n.Cookie != cookie { log.Println("delete with unmaching cookie from ", r.RemoteAddr, "agent", r.UserAgent()) return } n.Size = 0 ret := replication.ReplicatedDelete(*masterNode, store, volumeId, n, r) if ret != 0 { w.WriteHeader(http.StatusAccepted) } else { w.WriteHeader(http.StatusInternalServerError) } m := make(map[string]uint32) m["size"] = uint32(count) writeJsonQuiet(w, r, m) } func parseURLPath(path string) (vid, fid, ext string) { sepIndex := strings.LastIndex(path, "/") commaIndex := strings.LastIndex(path[sepIndex:], ",") if commaIndex <= 0 { if "favicon.ico" != path[sepIndex+1:] { log.Println("unknown file id", path[sepIndex+1:]) } return } dotIndex := strings.LastIndex(path[sepIndex:], ".") vid = path[sepIndex+1 : commaIndex] fid = path[commaIndex+1:] ext = "" if dotIndex > 0 { fid = path[commaIndex+1 : dotIndex] ext = path[dotIndex:] } return } func runVolume(cmd *Command, args []string) bool { if *vMaxCpu < 1 { *vMaxCpu = runtime.NumCPU() } runtime.GOMAXPROCS(*vMaxCpu) fileInfo, err := os.Stat(*volumeFolder) if err != nil { log.Fatalf("No Existing Folder:%s", *volumeFolder) } if !fileInfo.IsDir() { log.Fatalf("Volume Folder should not be a file:%s", *volumeFolder) } perm := fileInfo.Mode().Perm() log.Println("Volume Folder permission:", perm) if *publicUrl == "" { *publicUrl = *ip + ":" + strconv.Itoa(*vport) } store = storage.NewStore(*vport, *ip, *publicUrl, *volumeFolder, *maxVolumeCount) defer store.Close() http.HandleFunc("/", storeHandler) http.HandleFunc("/status", statusHandler) http.HandleFunc("/admin/assign_volume", assignVolumeHandler) http.HandleFunc("/admin/vacuum_volume_check", vacuumVolumeCheckHandler) http.HandleFunc("/admin/vacuum_volume_compact", vacuumVolumeCompactHandler) http.HandleFunc("/admin/vacuum_volume_commit", vacuumVolumeCommitHandler) http.HandleFunc("/admin/freeze_volume", freezeVolumeHandler) go func() { connected := true store.SetMaster(*masterNode) store.SetDataCenter(*dataCenter) store.SetRack(*rack) for { err := store.Join() if err == nil { if !connected { connected = true log.Println("Reconnected with master") } } else { if connected { connected = false } } time.Sleep(time.Duration(float32(*vpulse*1e3)*(1+rand.Float32())) * time.Millisecond) } }() log.Println("store joined at", *masterNode) log.Println("Start Weed volume server", VERSION, "at http://"+*ip+":"+strconv.Itoa(*vport)) srv := &http.Server{ Addr: ":" + strconv.Itoa(*vport), Handler: http.DefaultServeMux, ReadTimeout: (time.Duration(*vReadTimeout) * time.Second), } e := srv.ListenAndServe() if e != nil { log.Fatalf("Fail to start:%s", e.Error()) } return true }