mirror of
https://github.com/seaweedfs/seaweedfs.git
synced 2024-01-19 02:48:24 +00:00
398 lines
12 KiB
Go
398 lines
12 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/operation"
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"code.google.com/p/weed-fs/go/storage"
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"log"
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"math/rand"
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"mime"
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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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"time"
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)
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func init() {
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cmdVolume.Run = runVolume // break init cycle
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cmdVolume.IsDebug = cmdVolume.Flag.Bool("debug", false, "enable debug mode")
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}
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var cmdVolume = &Command{
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UsageLine: "volume -port=8080 -dir=/tmp -max=5 -ip=server_name -mserver=localhost:9333",
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Short: "start a volume server",
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Long: `start a volume server to provide storage spaces
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`,
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}
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var (
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vport = cmdVolume.Flag.Int("port", 8080, "http listen port")
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volumeFolder = cmdVolume.Flag.String("dir", "/tmp", "directory to store data files")
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ip = cmdVolume.Flag.String("ip", "localhost", "ip or server name")
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publicUrl = cmdVolume.Flag.String("publicUrl", "", "Publicly accessible <ip|server_name>:<port>")
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masterNode = cmdVolume.Flag.String("mserver", "localhost:9333", "master server location")
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vpulse = cmdVolume.Flag.Int("pulseSeconds", 5, "number of seconds between heartbeats, must be smaller than the master's setting")
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maxVolumeCount = cmdVolume.Flag.Int("max", 5, "maximum number of volumes")
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vReadTimeout = cmdVolume.Flag.Int("readTimeout", 3, "connection read timeout in seconds")
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vMaxCpu = cmdVolume.Flag.Int("maxCpu", 0, "maximum number of CPUs. 0 means all available CPUs")
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store *storage.Store
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)
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var fileNameEscaper = strings.NewReplacer("\\", "\\\\", "\"", "\\\"")
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func statusHandler(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"] = store.Status()
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writeJsonQuiet(w, r, m)
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}
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func assignVolumeHandler(w http.ResponseWriter, r *http.Request) {
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err := store.AddVolume(r.FormValue("volume"), r.FormValue("replicationType"))
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if err == nil {
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writeJsonQuiet(w, r, map[string]string{"error": ""})
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} else {
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writeJsonQuiet(w, r, map[string]string{"error": err.Error()})
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}
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debug("assign volume =", r.FormValue("volume"), ", replicationType =", r.FormValue("replicationType"), ", error =", err)
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}
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func vacuumVolumeCheckHandler(w http.ResponseWriter, r *http.Request) {
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err, ret := store.CheckCompactVolume(r.FormValue("volume"), r.FormValue("garbageThreshold"))
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if err == nil {
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writeJsonQuiet(w, r, map[string]interface{}{"error": "", "result": ret})
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} else {
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writeJsonQuiet(w, r, map[string]interface{}{"error": err.Error(), "result": false})
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}
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debug("checked compacting volume =", r.FormValue("volume"), "garbageThreshold =", r.FormValue("garbageThreshold"), "vacuum =", ret)
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}
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func vacuumVolumeCompactHandler(w http.ResponseWriter, r *http.Request) {
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err := store.CompactVolume(r.FormValue("volume"))
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if err == nil {
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writeJsonQuiet(w, r, map[string]string{"error": ""})
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} else {
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writeJsonQuiet(w, r, map[string]string{"error": err.Error()})
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}
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debug("compacted volume =", r.FormValue("volume"), ", error =", err)
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}
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func vacuumVolumeCommitHandler(w http.ResponseWriter, r *http.Request) {
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err := store.CommitCompactVolume(r.FormValue("volume"))
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if err == nil {
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writeJsonQuiet(w, r, map[string]interface{}{"error": ""})
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} else {
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writeJsonQuiet(w, r, map[string]string{"error": err.Error()})
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}
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debug("commit compact volume =", r.FormValue("volume"), ", error =", err)
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}
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func storeHandler(w http.ResponseWriter, r *http.Request) {
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switch r.Method {
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case "GET":
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GetOrHeadHandler(w, r, true)
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case "HEAD":
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GetOrHeadHandler(w, r, false)
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case "DELETE":
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DeleteHandler(w, r)
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case "POST":
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PostHandler(w, r)
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}
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}
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func GetOrHeadHandler(w http.ResponseWriter, r *http.Request, isGetMethod bool) {
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n := new(storage.Needle)
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vid, fid, ext := 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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n.ParsePath(fid)
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debug("volume", volumeId, "reading", n)
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if !store.HasVolume(volumeId) {
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lookupResult, err := operation.Lookup(*masterNode, volumeId)
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debug("volume", volumeId, "found on", lookupResult, "error", err)
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if err == nil {
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http.Redirect(w, r, "http://"+lookupResult.Locations[0].PublicUrl+r.URL.Path, http.StatusMovedPermanently)
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} else {
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debug("lookup error:", err, r.URL.Path)
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w.WriteHeader(http.StatusNotFound)
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}
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return
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}
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cookie := n.Cookie
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count, e := store.Read(volumeId, n)
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debug("read bytes", count, "error", e)
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if e != nil || count <= 0 {
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debug("read error:", e, r.URL.Path)
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w.WriteHeader(http.StatusNotFound)
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return
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}
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if n.Cookie != cookie {
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log.Println("request with unmaching cookie from ", r.RemoteAddr, "agent", r.UserAgent())
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w.WriteHeader(http.StatusNotFound)
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return
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}
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if n.NameSize > 0 {
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fname := string(n.Name)
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dotIndex := strings.LastIndex(fname, ".")
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if dotIndex > 0 {
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ext = fname[dotIndex:]
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}
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}
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mtype := ""
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if ext != "" {
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mtype = mime.TypeByExtension(ext)
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}
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if n.MimeSize > 0 {
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mtype = string(n.Mime)
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}
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if mtype != "" {
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w.Header().Set("Content-Type", mtype)
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}
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if n.NameSize > 0 {
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w.Header().Set("Content-Disposition", "filename="+fileNameEscaper.Replace(string(n.Name)))
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}
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if ext != ".gz" {
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if n.IsGzipped() {
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if strings.Contains(r.Header.Get("Accept-Encoding"), "gzip") {
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w.Header().Set("Content-Encoding", "gzip")
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} else {
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if n.Data, err = storage.UnGzipData(n.Data); err != nil {
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debug("lookup error:", err, r.URL.Path)
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}
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}
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}
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}
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w.Header().Set("Content-Length", strconv.Itoa(len(n.Data)))
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if isGetMethod {
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if _, e = w.Write(n.Data); e != nil {
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debug("response write error:", e)
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}
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}
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}
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func PostHandler(w http.ResponseWriter, r *http.Request) {
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if e := r.ParseForm(); e != nil {
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debug("form parse error:", e)
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writeJsonQuiet(w, r, e)
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return
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}
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vid, _, _ := parseURLPath(r.URL.Path)
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volumeId, e := storage.NewVolumeId(vid)
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if e != nil {
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debug("NewVolumeId error:", e)
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writeJsonQuiet(w, r, e)
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return
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}
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if e != nil {
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writeJsonQuiet(w, r, e)
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} else {
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needle, filename, ne := storage.NewNeedle(r)
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if ne != nil {
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writeJsonQuiet(w, r, ne)
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} else {
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ret, err := store.Write(volumeId, needle)
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errorStatus := ""
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needToReplicate := !store.HasVolume(volumeId)
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if err != nil {
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errorStatus = "Failed to write to local disk (" + err.Error() + ")"
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} else if ret > 0 {
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needToReplicate = needToReplicate || store.GetVolume(volumeId).NeedToReplicate()
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} else {
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errorStatus = "Failed to write to local disk"
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}
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if !needToReplicate && ret > 0 {
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needToReplicate = store.GetVolume(volumeId).NeedToReplicate()
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}
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if needToReplicate { //send to other replica locations
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if r.FormValue("type") != "standard" {
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if !distributedOperation(volumeId, func(location operation.Location) bool {
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_, err := operation.Upload("http://"+location.Url+r.URL.Path+"?type=standard", filename, bytes.NewReader(needle.Data))
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return err == nil
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}) {
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ret = 0
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errorStatus = "Failed to write to replicas for volume " + volumeId.String()
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}
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}
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}
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m := make(map[string]interface{})
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if errorStatus == "" {
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w.WriteHeader(http.StatusCreated)
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} else {
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if _, e = store.Delete(volumeId, needle); e != nil {
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errorStatus += "\nCannot delete " + strconv.FormatUint(needle.Id, 10) + " from " +
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strconv.FormatUint(uint64(volumeId), 10) + ": " + e.Error()
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} else {
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distributedOperation(volumeId, func(location operation.Location) bool {
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return nil == operation.Delete("http://"+location.Url+r.URL.Path+"?type=standard")
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})
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}
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w.WriteHeader(http.StatusInternalServerError)
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m["error"] = errorStatus
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}
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m["size"] = ret
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writeJsonQuiet(w, r, m)
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}
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}
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}
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func DeleteHandler(w http.ResponseWriter, r *http.Request) {
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n := new(storage.Needle)
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vid, fid, _ := parseURLPath(r.URL.Path)
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volumeId, _ := storage.NewVolumeId(vid)
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n.ParsePath(fid)
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debug("deleting", n)
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cookie := n.Cookie
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count, ok := store.Read(volumeId, n)
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if ok != nil {
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m := make(map[string]uint32)
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m["size"] = 0
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writeJsonQuiet(w, r, m)
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return
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}
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if n.Cookie != cookie {
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log.Println("delete with unmaching cookie from ", r.RemoteAddr, "agent", r.UserAgent())
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return
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}
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n.Size = 0
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ret, err := store.Delete(volumeId, n)
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if err != nil {
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log.Println("delete error:", err)
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return
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}
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needToReplicate := !store.HasVolume(volumeId)
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if !needToReplicate && ret > 0 {
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needToReplicate = store.GetVolume(volumeId).NeedToReplicate()
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}
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if needToReplicate { //send to other replica locations
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if r.FormValue("type") != "standard" {
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if !distributedOperation(volumeId, func(location operation.Location) bool {
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return nil == operation.Delete("http://"+location.Url+r.URL.Path+"?type=standard")
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}) {
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ret = 0
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}
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}
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}
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if ret != 0 {
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w.WriteHeader(http.StatusAccepted)
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} else {
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w.WriteHeader(http.StatusInternalServerError)
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}
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m := make(map[string]uint32)
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m["size"] = uint32(count)
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writeJsonQuiet(w, r, m)
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}
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func parseURLPath(path string) (vid, fid, ext string) {
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sepIndex := strings.LastIndex(path, "/")
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commaIndex := strings.LastIndex(path[sepIndex:], ",")
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if commaIndex <= 0 {
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if "favicon.ico" != path[sepIndex+1:] {
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log.Println("unknown file id", path[sepIndex+1:])
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}
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return
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}
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dotIndex := strings.LastIndex(path[sepIndex:], ".")
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vid = path[sepIndex+1 : commaIndex]
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fid = path[commaIndex+1:]
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ext = ""
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if dotIndex > 0 {
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fid = path[commaIndex+1 : dotIndex]
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ext = path[dotIndex:]
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}
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return
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}
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func distributedOperation(volumeId storage.VolumeId, op func(location operation.Location) bool) bool {
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if lookupResult, lookupErr := operation.Lookup(*masterNode, volumeId); lookupErr == nil {
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length := 0
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selfUrl := (*ip + ":" + strconv.Itoa(*vport))
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results := make(chan bool)
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for _, location := range lookupResult.Locations {
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if location.Url != selfUrl {
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length++
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go func(location operation.Location, results chan bool) {
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results <- op(location)
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}(location, results)
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}
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}
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ret := true
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for i := 0; i < length; i++ {
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ret = ret && <-results
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}
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return ret
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} else {
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log.Println("Failed to lookup for", volumeId, lookupErr.Error())
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}
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return false
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}
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func runVolume(cmd *Command, args []string) bool {
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if *vMaxCpu < 1 {
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*vMaxCpu = runtime.NumCPU()
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}
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runtime.GOMAXPROCS(*vMaxCpu)
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fileInfo, err := os.Stat(*volumeFolder)
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if err != nil {
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log.Fatalf("No Existing Folder:%s", *volumeFolder)
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}
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if !fileInfo.IsDir() {
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log.Fatalf("Volume Folder should not be a file:%s", *volumeFolder)
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}
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perm := fileInfo.Mode().Perm()
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log.Println("Volume Folder permission:", perm)
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if *publicUrl == "" {
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*publicUrl = *ip + ":" + strconv.Itoa(*vport)
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}
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store = storage.NewStore(*vport, *ip, *publicUrl, *volumeFolder, *maxVolumeCount)
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defer store.Close()
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http.HandleFunc("/", storeHandler)
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http.HandleFunc("/status", statusHandler)
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http.HandleFunc("/admin/assign_volume", assignVolumeHandler)
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http.HandleFunc("/admin/vacuum_volume_check", vacuumVolumeCheckHandler)
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http.HandleFunc("/admin/vacuum_volume_compact", vacuumVolumeCompactHandler)
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http.HandleFunc("/admin/vacuum_volume_commit", vacuumVolumeCommitHandler)
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go func() {
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connected := true
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store.SetMaster(*masterNode)
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for {
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err := store.Join()
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if err == nil {
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if !connected {
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connected = true
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log.Println("Reconnected with master")
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}
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} else {
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if connected {
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connected = false
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}
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}
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time.Sleep(time.Duration(float32(*vpulse*1e3)*(1+rand.Float32())) * time.Millisecond)
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}
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}()
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log.Println("store joined at", *masterNode)
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log.Println("Start Weed volume server", VERSION, "at http://"+*ip+":"+strconv.Itoa(*vport))
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srv := &http.Server{
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Addr: ":" + strconv.Itoa(*vport),
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Handler: http.DefaultServeMux,
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ReadTimeout: (time.Duration(*vReadTimeout) * time.Second),
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}
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e := srv.ListenAndServe()
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if e != nil {
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log.Fatalf("Fail to start:%s", e.Error())
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}
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return true
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}
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