seaweedfs/weed/server/master_server_handlers_admin.go

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package weed_server
import (
"errors"
"fmt"
"math/rand"
"net/http"
"strconv"
"github.com/chrislusf/seaweedfs/weed/glog"
"github.com/chrislusf/seaweedfs/weed/storage"
"github.com/chrislusf/seaweedfs/weed/topology"
"github.com/chrislusf/seaweedfs/weed/util"
)
func (ms *MasterServer) collectionDeleteHandler(w http.ResponseWriter, r *http.Request) {
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collection, ok := ms.Topo.FindCollection(r.FormValue("collection"))
if !ok {
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writeJsonError(w, r, http.StatusBadRequest, fmt.Errorf("collection %s does not exist", r.FormValue("collection")))
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 {
writeJsonError(w, r, http.StatusInternalServerError, err)
return
}
}
ms.Topo.DeleteCollection(r.FormValue("collection"))
}
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, http.StatusOK, m)
}
func (ms *MasterServer) volumeVacuumHandler(w http.ResponseWriter, r *http.Request) {
gcThreshold := r.FormValue("garbageThreshold")
if gcThreshold == "" {
gcThreshold = ms.garbageThreshold
}
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glog.Infoln("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 {
writeJsonError(w, r, http.StatusNotAcceptable, err)
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 {
writeJsonError(w, r, http.StatusNotAcceptable, err)
} else {
writeJsonQuiet(w, r, http.StatusOK, 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, http.StatusOK, 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
}
collection := r.FormValue("collection")
machines := ms.Topo.Lookup(collection, volumeId)
if machines != nil && len(machines) > 0 {
var url string
if r.URL.RawQuery != "" {
url = util.NormalizeUrl(machines[rand.Intn(len(machines))].PublicUrl) + r.URL.Path + "?" + r.URL.RawQuery
} else {
url = util.NormalizeUrl(machines[rand.Intn(len(machines))].PublicUrl) + r.URL.Path
}
http.Redirect(w, r, url, http.StatusMovedPermanently)
} else {
writeJsonError(w, r, http.StatusNotFound, fmt.Errorf("volume id %d or collection %s not found", volumeId, collection))
}
}
func (ms *MasterServer) selfUrl(r *http.Request) string {
if r.Host != "" {
return r.Host
}
return "localhost:" + strconv.Itoa(ms.port)
}
func (ms *MasterServer) submitFromMasterServerHandler(w http.ResponseWriter, r *http.Request) {
if ms.Topo.IsLeader() {
submitForClientHandler(w, r, ms.selfUrl(r))
} else {
masterUrl, err := ms.Topo.Leader()
if err != nil {
writeJsonError(w, r, http.StatusInternalServerError, err)
} else {
submitForClientHandler(w, r, masterUrl)
}
}
}
func (ms *MasterServer) deleteFromMasterServerHandler(w http.ResponseWriter, r *http.Request) {
if ms.Topo.IsLeader() {
deleteForClientHandler(w, r, ms.selfUrl(r))
} 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
}
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preallocate := ms.preallocate
if r.FormValue("preallocate") != "" {
preallocate, err = strconv.ParseInt(r.FormValue("preallocate"), 10, 64)
if err != nil {
return nil, fmt.Errorf("Failed to parse int64 preallocate = %s: %v", r.FormValue("preallocate"), err)
}
}
volumeGrowOption := &topology.VolumeGrowOption{
Collection: r.FormValue("collection"),
ReplicaPlacement: replicaPlacement,
Ttl: ttl,
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Prealloacte: preallocate,
DataCenter: r.FormValue("dataCenter"),
Rack: r.FormValue("rack"),
DataNode: r.FormValue("dataNode"),
}
return volumeGrowOption, nil
}