mirror of
https://github.com/seaweedfs/seaweedfs.git
synced 2024-01-19 02:48:24 +00:00
292 lines
9.7 KiB
Go
292 lines
9.7 KiB
Go
package main
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import (
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"bytes"
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"code.google.com/p/weed-fs/go/glog"
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"code.google.com/p/weed-fs/go/operation"
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"code.google.com/p/weed-fs/go/replication"
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"code.google.com/p/weed-fs/go/storage"
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"code.google.com/p/weed-fs/go/topology"
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"encoding/json"
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"errors"
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"net/http"
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"os"
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"runtime"
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"strconv"
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"strings"
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"sync"
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"time"
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)
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func init() {
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cmdMaster.Run = runMaster // break init cycle
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cmdMaster.IsDebug = cmdMaster.Flag.Bool("debug", false, "enable debug mode")
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}
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var cmdMaster = &Command{
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UsageLine: "master -port=9333",
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Short: "start a master server",
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Long: `start a master server to provide volume=>location mapping service
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and sequence number of file ids
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`,
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}
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var (
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mport = cmdMaster.Flag.Int("port", 9333, "http listen port")
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metaFolder = cmdMaster.Flag.String("mdir", os.TempDir(), "data directory to store mappings")
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volumeSizeLimitMB = cmdMaster.Flag.Uint("volumeSizeLimitMB", 32*1024, "Default Volume Size in MegaBytes")
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mpulse = cmdMaster.Flag.Int("pulseSeconds", 5, "number of seconds between heartbeats")
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confFile = cmdMaster.Flag.String("conf", "/etc/weedfs/weedfs.conf", "xml configuration file")
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defaultRepType = cmdMaster.Flag.String("defaultReplicationType", "000", "Default replication type if not specified.")
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mReadTimeout = cmdMaster.Flag.Int("readTimeout", 3, "connection read timeout in seconds")
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mMaxCpu = cmdMaster.Flag.Int("maxCpu", 0, "maximum number of CPUs. 0 means all available CPUs")
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garbageThreshold = cmdMaster.Flag.String("garbageThreshold", "0.3", "threshold to vacuum and reclaim spaces")
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masterWhiteListOption = cmdMaster.Flag.String("whiteList", "", "comma separated Ip addresses having write permission. No limit if empty.")
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masterWhiteList []string
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)
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var topo *topology.Topology
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var vg *replication.VolumeGrowth
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var vgLock sync.Mutex
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func dirLookupHandler(w http.ResponseWriter, r *http.Request) {
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vid := r.FormValue("volumeId")
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commaSep := strings.Index(vid, ",")
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if commaSep > 0 {
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vid = vid[0:commaSep]
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}
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volumeId, err := storage.NewVolumeId(vid)
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if err == nil {
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machines := topo.Lookup(volumeId)
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if machines != nil {
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ret := []map[string]string{}
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for _, dn := range machines {
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ret = append(ret, map[string]string{"url": dn.Url(), "publicUrl": dn.PublicUrl})
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}
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writeJsonQuiet(w, r, map[string]interface{}{"locations": ret})
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} else {
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w.WriteHeader(http.StatusNotFound)
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writeJsonQuiet(w, r, map[string]string{"error": "volume id " + volumeId.String() + " not found. "})
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}
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} else {
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w.WriteHeader(http.StatusNotAcceptable)
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writeJsonQuiet(w, r, map[string]string{"error": "unknown volumeId format " + vid})
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}
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}
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func dirAssignHandler(w http.ResponseWriter, r *http.Request) {
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c, e := strconv.Atoi(r.FormValue("count"))
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if e != nil {
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c = 1
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}
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repType := r.FormValue("replication")
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if repType == "" {
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repType = *defaultRepType
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}
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dataCenter := r.FormValue("dataCenter")
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rt, err := storage.NewReplicationTypeFromString(repType)
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if err != nil {
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w.WriteHeader(http.StatusNotAcceptable)
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writeJsonQuiet(w, r, map[string]string{"error": err.Error()})
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return
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}
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if topo.GetVolumeLayout(rt).GetActiveVolumeCount(dataCenter) <= 0 {
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if topo.FreeSpace() <= 0 {
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w.WriteHeader(http.StatusNotFound)
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writeJsonQuiet(w, r, map[string]string{"error": "No free volumes left!"})
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return
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} else {
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vgLock.Lock()
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defer vgLock.Unlock()
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if topo.GetVolumeLayout(rt).GetActiveVolumeCount(dataCenter) <= 0 {
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if _, err = vg.AutomaticGrowByType(rt, dataCenter, topo); err != nil {
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writeJsonQuiet(w, r, map[string]string{"error": "Cannot grow volume group! " + err.Error()})
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return
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}
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}
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}
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}
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fid, count, dn, err := topo.PickForWrite(rt, c, dataCenter)
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if err == nil {
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writeJsonQuiet(w, r, map[string]interface{}{"fid": fid, "url": dn.Url(), "publicUrl": dn.PublicUrl, "count": count})
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} else {
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w.WriteHeader(http.StatusNotAcceptable)
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writeJsonQuiet(w, r, map[string]string{"error": err.Error()})
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}
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}
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func dirJoinHandler(w http.ResponseWriter, r *http.Request) {
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init := r.FormValue("init") == "true"
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ip := r.FormValue("ip")
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if ip == "" {
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ip = r.RemoteAddr[0:strings.Index(r.RemoteAddr, ":")]
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}
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port, _ := strconv.Atoi(r.FormValue("port"))
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maxVolumeCount, _ := strconv.Atoi(r.FormValue("maxVolumeCount"))
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s := r.RemoteAddr[0:strings.Index(r.RemoteAddr, ":")+1] + r.FormValue("port")
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publicUrl := r.FormValue("publicUrl")
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volumes := new([]storage.VolumeInfo)
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if err := json.Unmarshal([]byte(r.FormValue("volumes")), volumes); err != nil {
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writeJsonQuiet(w, r, map[string]string{"error": "Cannot unmarshal \"volumes\": " + err.Error()})
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return
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}
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debug(s, "volumes", r.FormValue("volumes"))
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topo.RegisterVolumes(init, *volumes, ip, port, publicUrl, maxVolumeCount, r.FormValue("dataCenter"), r.FormValue("rack"))
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m := make(map[string]interface{})
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m["VolumeSizeLimit"] = uint64(*volumeSizeLimitMB) * 1024 * 1024
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writeJsonQuiet(w, r, m)
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}
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func dirStatusHandler(w http.ResponseWriter, r *http.Request) {
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m := make(map[string]interface{})
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m["Version"] = VERSION
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m["Topology"] = topo.ToMap()
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writeJsonQuiet(w, r, m)
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}
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func volumeVacuumHandler(w http.ResponseWriter, r *http.Request) {
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gcThreshold := r.FormValue("garbageThreshold")
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if gcThreshold == "" {
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gcThreshold = *garbageThreshold
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}
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debug("garbageThreshold =", gcThreshold)
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topo.Vacuum(gcThreshold)
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dirStatusHandler(w, r)
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}
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func volumeGrowHandler(w http.ResponseWriter, r *http.Request) {
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count := 0
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rt, err := storage.NewReplicationTypeFromString(r.FormValue("replication"))
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if err == nil {
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if count, err = strconv.Atoi(r.FormValue("count")); err == nil {
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if topo.FreeSpace() < count*rt.GetCopyCount() {
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err = errors.New("Only " + strconv.Itoa(topo.FreeSpace()) + " volumes left! Not enough for " + strconv.Itoa(count*rt.GetCopyCount()))
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} else {
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count, err = vg.GrowByCountAndType(count, rt, r.FormValue("dataCneter"), topo)
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}
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} else {
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err = errors.New("parameter count is not found")
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}
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}
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if err != nil {
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w.WriteHeader(http.StatusNotAcceptable)
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writeJsonQuiet(w, r, map[string]string{"error": "parameter replication " + err.Error()})
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} else {
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w.WriteHeader(http.StatusNotAcceptable)
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writeJsonQuiet(w, r, map[string]interface{}{"count": count})
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}
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}
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func volumeStatusHandler(w http.ResponseWriter, r *http.Request) {
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m := make(map[string]interface{})
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m["Version"] = VERSION
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m["Volumes"] = topo.ToVolumeMap()
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writeJsonQuiet(w, r, m)
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}
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func redirectHandler(w http.ResponseWriter, r *http.Request) {
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vid, _, _, _, _ := parseURLPath(r.URL.Path)
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volumeId, err := storage.NewVolumeId(vid)
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if err != nil {
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debug("parsing error:", err, r.URL.Path)
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return
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}
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machines := topo.Lookup(volumeId)
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if machines != nil && len(machines) > 0 {
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http.Redirect(w, r, "http://"+machines[0].PublicUrl+r.URL.Path, http.StatusMovedPermanently)
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} else {
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w.WriteHeader(http.StatusNotFound)
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writeJsonQuiet(w, r, map[string]string{"error": "volume id " + volumeId.String() + " not found. "})
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}
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}
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func submitFromMasterServerHandler(w http.ResponseWriter, r *http.Request) {
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submitForClientHandler(w, r, "localhost:"+strconv.Itoa(*mport))
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}
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func runMaster(cmd *Command, args []string) bool {
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if *mMaxCpu < 1 {
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*mMaxCpu = runtime.NumCPU()
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}
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runtime.GOMAXPROCS(*mMaxCpu)
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if *masterWhiteListOption != "" {
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masterWhiteList = strings.Split(*masterWhiteListOption, ",")
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}
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var e error
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if topo, e = topology.NewTopology("topo", *confFile, *metaFolder, "weed",
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uint64(*volumeSizeLimitMB)*1024*1024, *mpulse); e != nil {
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glog.Fatalf("cannot create topology:%s", e)
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}
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vg = replication.NewDefaultVolumeGrowth()
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glog.V(0).Infoln("Volume Size Limit is", *volumeSizeLimitMB, "MB")
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http.HandleFunc("/dir/assign", secure(masterWhiteList, dirAssignHandler))
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http.HandleFunc("/dir/lookup", secure(masterWhiteList, dirLookupHandler))
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http.HandleFunc("/dir/join", secure(masterWhiteList, dirJoinHandler))
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http.HandleFunc("/dir/status", secure(masterWhiteList, dirStatusHandler))
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http.HandleFunc("/vol/grow", secure(masterWhiteList, volumeGrowHandler))
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http.HandleFunc("/vol/status", secure(masterWhiteList, volumeStatusHandler))
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http.HandleFunc("/vol/vacuum", secure(masterWhiteList, volumeVacuumHandler))
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http.HandleFunc("/submit", secure(masterWhiteList, submitFromMasterServerHandler))
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http.HandleFunc("/", redirectHandler)
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topo.StartRefreshWritableVolumes(*garbageThreshold)
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glog.V(0).Infoln("Start Weed Master", VERSION, "at port", strconv.Itoa(*mport))
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srv := &http.Server{
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Addr: ":" + strconv.Itoa(*mport),
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Handler: http.DefaultServeMux,
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ReadTimeout: time.Duration(*mReadTimeout) * time.Second,
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}
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e = srv.ListenAndServe()
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if e != nil {
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glog.Fatalf("Fail to start:%s", e)
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}
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return true
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}
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func submitForClientHandler(w http.ResponseWriter, r *http.Request, masterUrl string) {
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m := make(map[string]interface{})
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if r.Method != "POST" {
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m["error"] = "Only submit via POST!"
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writeJsonQuiet(w, r, m)
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return
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}
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debug("parsing upload file...")
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fname, data, mimeType, isGzipped, lastModified, pe := storage.ParseUpload(r)
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if pe != nil {
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writeJsonError(w, r, pe)
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return
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}
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debug("assigning file id for", fname)
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assignResult, ae := operation.Assign(masterUrl, 1, r.FormValue("replication"))
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if ae != nil {
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writeJsonError(w, r, ae)
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return
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}
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url := "http://" + assignResult.PublicUrl + "/" + assignResult.Fid
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if lastModified != 0 {
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url = url + "?ts=" + strconv.FormatUint(lastModified, 10)
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}
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debug("upload file to store", url)
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uploadResult, err := operation.Upload(url, fname, bytes.NewReader(data), isGzipped, mimeType)
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if err != nil {
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writeJsonError(w, r, err)
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return
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}
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m["fileName"] = fname
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m["fid"] = assignResult.Fid
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m["fileUrl"] = assignResult.PublicUrl + "/" + assignResult.Fid
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m["size"] = uploadResult.Size
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writeJsonQuiet(w, r, m)
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return
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}
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