seaweedfs/go/weed/weed_server/master_server_handlers_admin.go

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package weed_server
import (
"encoding/json"
"errors"
"io/ioutil"
"net/http"
"strconv"
"strings"
proto "code.google.com/p/goprotobuf/proto"
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"github.com/mcqueenorama/weed-fs/go/glog"
"github.com/mcqueenorama/weed-fs/go/operation"
"github.com/mcqueenorama/weed-fs/go/storage"
"github.com/mcqueenorama/weed-fs/go/topology"
"github.com/mcqueenorama/weed-fs/go/util"
)
func (ms *MasterServer) collectionDeleteHandler(w http.ResponseWriter, r *http.Request) {
collection, ok := ms.Topo.GetCollection(r.FormValue("collection"))
if !ok {
writeJsonQuiet(w, r, map[string]interface{}{"error": "collection " + r.FormValue("collection") + "does not exist!"})
return
}
for _, server := range collection.ListVolumeServers() {
_, err := util.Get("http://" + server.Ip + ":" + strconv.Itoa(server.Port) + "/admin/delete_collection?collection=" + r.FormValue("collection"))
if err != nil {
writeJsonQuiet(w, r, map[string]string{"error": err.Error()})
return
}
}
ms.Topo.DeleteCollection(r.FormValue("collection"))
}
func (ms *MasterServer) dirJoinHandler(w http.ResponseWriter, r *http.Request) {
body, err := ioutil.ReadAll(r.Body)
if err != nil {
writeJsonError(w, r, err)
return
}
joinMessage := &operation.JoinMessage{}
if err = proto.Unmarshal(body, joinMessage); err != nil {
writeJsonError(w, r, err)
return
}
if *joinMessage.Ip == "" {
*joinMessage.Ip = r.RemoteAddr[0:strings.Index(r.RemoteAddr, ":")]
}
if glog.V(4) {
if jsonData, jsonError := json.Marshal(joinMessage); jsonError != nil {
glog.V(0).Infoln("json marshaling error: ", jsonError)
writeJsonError(w, r, jsonError)
return
} else {
glog.V(4).Infoln("Proto size", len(body), "json size", len(jsonData), string(jsonData))
}
}
ms.Topo.ProcessJoinMessage(joinMessage)
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writeJsonQuiet(w, r, operation.JoinResult{VolumeSizeLimit: uint64(ms.volumeSizeLimitMB) * 1024 * 1024})
}
func (ms *MasterServer) dirStatusHandler(w http.ResponseWriter, r *http.Request) {
m := make(map[string]interface{})
m["Version"] = util.VERSION
m["Topology"] = ms.Topo.ToMap()
writeJsonQuiet(w, r, m)
}
func (ms *MasterServer) volumeVacuumHandler(w http.ResponseWriter, r *http.Request) {
gcThreshold := r.FormValue("garbageThreshold")
if gcThreshold == "" {
gcThreshold = ms.garbageThreshold
}
debug("garbageThreshold =", gcThreshold)
ms.Topo.Vacuum(gcThreshold)
ms.dirStatusHandler(w, r)
}
func (ms *MasterServer) volumeGrowHandler(w http.ResponseWriter, r *http.Request) {
count := 0
option, err := ms.getVolumeGrowOption(r)
if err != nil {
w.WriteHeader(http.StatusNotAcceptable)
writeJsonQuiet(w, r, map[string]string{"error": err.Error()})
return
}
if err == nil {
if count, err = strconv.Atoi(r.FormValue("count")); err == nil {
if ms.Topo.FreeSpace() < count*option.ReplicaPlacement.GetCopyCount() {
err = errors.New("Only " + strconv.Itoa(ms.Topo.FreeSpace()) + " volumes left! Not enough for " + strconv.Itoa(count*option.ReplicaPlacement.GetCopyCount()))
} else {
count, err = ms.vg.GrowByCountAndType(count, option, ms.Topo)
}
} else {
err = errors.New("parameter count is not found")
}
}
if err != nil {
w.WriteHeader(http.StatusNotAcceptable)
writeJsonQuiet(w, r, map[string]string{"error": err.Error()})
} else {
w.WriteHeader(http.StatusOK)
writeJsonQuiet(w, r, map[string]interface{}{"count": count})
}
}
func (ms *MasterServer) volumeStatusHandler(w http.ResponseWriter, r *http.Request) {
m := make(map[string]interface{})
m["Version"] = util.VERSION
m["Volumes"] = ms.Topo.ToVolumeMap()
writeJsonQuiet(w, r, m)
}
func (ms *MasterServer) 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 := ms.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)
writeJsonQuiet(w, r, map[string]string{"error": "volume id " + volumeId.String() + " not found. "})
}
}
func (ms *MasterServer) submitFromMasterServerHandler(w http.ResponseWriter, r *http.Request) {
if ms.Topo.IsLeader() {
submitForClientHandler(w, r, "localhost:"+strconv.Itoa(ms.port))
} else {
submitForClientHandler(w, r, ms.Topo.RaftServer.Leader())
}
}
func (ms *MasterServer) deleteFromMasterServerHandler(w http.ResponseWriter, r *http.Request) {
if ms.Topo.IsLeader() {
deleteForClientHandler(w, r, "localhost:"+strconv.Itoa(ms.port))
} else {
deleteForClientHandler(w, r, ms.Topo.RaftServer.Leader())
}
}
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func (ms *MasterServer) HasWritableVolume(option *topology.VolumeGrowOption) bool {
vl := ms.Topo.GetVolumeLayout(option.Collection, option.ReplicaPlacement, option.Ttl)
return vl.GetActiveVolumeCount(option) > 0
}
func (ms *MasterServer) getVolumeGrowOption(r *http.Request) (*topology.VolumeGrowOption, error) {
replicationString := r.FormValue("replication")
if replicationString == "" {
replicationString = ms.defaultReplicaPlacement
}
replicaPlacement, err := storage.NewReplicaPlacementFromString(replicationString)
if err != nil {
return nil, err
}
ttl, err := storage.ReadTTL(r.FormValue("ttl"))
if err != nil {
return nil, err
}
volumeGrowOption := &topology.VolumeGrowOption{
Collection: r.FormValue("collection"),
ReplicaPlacement: replicaPlacement,
Ttl: ttl,
DataCenter: r.FormValue("dataCenter"),
Rack: r.FormValue("rack"),
DataNode: r.FormValue("dataNode"),
}
return volumeGrowOption, nil
}