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member.go
100 lines (82 loc) · 2.45 KB
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member.go
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/*
* Copyright (c) 2017, The Easegress Authors
* All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package api
import (
"fmt"
"net/http"
"sort"
"github.com/go-chi/chi/v5"
"github.com/megaease/easegress/v2/pkg/cluster"
"github.com/megaease/easegress/v2/pkg/util/codectool"
)
func (s *Server) memberAPIEntries() []*Entry {
return []*Entry{
{
Path: "/status/members",
Method: "GET",
Handler: s.listMembers,
},
{
Path: "/status/members/{member}",
Method: "DELETE",
Handler: s.purgeMember,
},
}
}
type (
// ListMembersResp is the response of list member.
ListMembersResp []cluster.MemberStatus
)
func (r ListMembersResp) Len() int { return len(r) }
func (r ListMembersResp) Less(i, j int) bool { return r[i].Options.Name < r[j].Options.Name }
func (r ListMembersResp) Swap(i, j int) { r[i], r[j] = r[j], r[i] }
// These methods which operate with cluster guarantee atomicity.
func (s *Server) listMembers(w http.ResponseWriter, r *http.Request) {
kv, err := s.cluster.GetPrefix(s.cluster.Layout().StatusMemberPrefix())
if err != nil {
ClusterPanic(err)
}
resp := make(ListMembersResp, 0)
for _, v := range kv {
memberStatus := cluster.MemberStatus{}
err := codectool.Unmarshal([]byte(v), &memberStatus)
if err != nil {
panic(fmt.Errorf("unmarshal %s to member status failed: %v", v, err))
}
resp = append(resp, memberStatus)
}
sort.Sort(resp)
buff, err := codectool.MarshalJSON(resp)
if err != nil {
panic(fmt.Errorf("marshal %#v to json failed: %v", resp, err))
}
w.Write(buff)
}
func (s *Server) purgeMember(w http.ResponseWriter, r *http.Request) {
memberName := chi.URLParam(r, "member")
s.Lock()
defer s.Unlock()
leaseStr, err := s.cluster.Get(s.cluster.Layout().OtherLease(memberName))
if err != nil {
ClusterPanic(err)
}
if leaseStr == nil {
HandleAPIError(w, r, http.StatusNotFound, fmt.Errorf("not found"))
return
}
s._purgeMember(memberName)
}