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master can redirect GET/DELETE/POST requests to volume servers. So

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clients does not always need to remember the volume server locations.
This is good for low~medium sized web site traffic.
This commit is contained in:
Chris Lu 2013-01-04 01:02:52 -08:00
parent e9eb8949ba
commit 8fb8ebdf14
3 changed files with 25 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
weed-fs/src/cmd/weed/master.go
View File

@ -54,7 +54,7 @@ func dirLookupHandler(w http.ResponseWriter, r *http.Request) {
machines := topo.Lookup(volumeId)
if machines != nil {
ret := []map[string]string{}
for _, dn := range *machines {
for _, dn := range machines {
ret = append(ret, map[string]string{"url": dn.Url(), "publicUrl": dn.PublicUrl})
}
writeJson(w, r, map[string]interface{}{"locations": ret})
@ -178,6 +178,22 @@ func volumeStatusHandler(w http.ResponseWriter, r *http.Request) {
writeJson(w, r, m)
}
func redirectHandler(w http.ResponseWriter, r *http.Request) {
vid, _, _ := parseURLPath(r.URL.Path)
volumeId, err := storage.NewVolumeId(vid)
if err != nil {
debug("parsing error:", err, r.URL.Path)
return
}
machines := topo.Lookup(volumeId)
if machines != nil && len(machines) > 0 {
http.Redirect(w, r, "http://"+machines[0].PublicUrl+r.URL.Path, http.StatusMovedPermanently)
} else {
w.WriteHeader(http.StatusNotFound)
writeJson(w, r, map[string]string{"error": "volume id " + volumeId.String() + " not found. "})
}
}
func runMaster(cmd *Command, args []string) bool {
if *mMaxCpu < 1 {
*mMaxCpu = runtime.NumCPU()
@ -192,6 +208,7 @@ func runMaster(cmd *Command, args []string) bool {
http.HandleFunc("/dir/status", dirStatusHandler)
http.HandleFunc("/vol/grow", volumeGrowHandler)
http.HandleFunc("/vol/status", volumeStatusHandler)
http.HandleFunc("/", redirectHandler)
topo.StartRefreshWritableVolumes(*garbageThreshold)

2
weed-fs/src/pkg/topology/topology.go
View File

@ -57,7 +57,7 @@ func (t *Topology) loadConfiguration(configurationFile string) error {
return e
}
func (t *Topology) Lookup(vid storage.VolumeId) *[]*DataNode {
func (t *Topology) Lookup(vid storage.VolumeId) []*DataNode {
for _, vl := range t.replicaType2VolumeLayout {
if vl != nil {
if list := vl.Lookup(vid); list != nil {

4
weed-fs/src/pkg/topology/volume_layout.go
View File

@ -42,8 +42,8 @@ func (vl *VolumeLayout) isWritable(v *storage.VolumeInfo) bool{
return uint64(v.Size) < vl.volumeSizeLimit && v.Version == storage.CurrentVersion
}
func (vl *VolumeLayout) Lookup(vid storage.VolumeId) *[]*DataNode {
return &vl.vid2location[vid].list
func (vl *VolumeLayout) Lookup(vid storage.VolumeId) []*DataNode {
return vl.vid2location[vid].list
}
func (vl *VolumeLayout) PickForWrite(count int) (*storage.VolumeId, int, *VolumeLocationList, error) {