/
rdiscover.go
200 lines (174 loc) · 5.5 KB
/
rdiscover.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
/*
* Tencent is pleased to support the open source community by making Blueking Container Service available.
* Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
* Licensed under the MIT License (the "License"); you may not use this file except
* in compliance with the License. You may obtain a copy of the License at
* http://opensource.org/licenses/MIT
* 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 rdiscover
import (
"encoding/json"
"fmt"
"github.com/Tencent/bk-bcs/bcs-common/common/RegisterDiscover"
"github.com/Tencent/bk-bcs/bcs-common/common/types"
"github.com/Tencent/bk-bcs/bcs-common/common/version"
"net"
"os"
"sync"
"time"
"github.com/Tencent/bk-bcs/bcs-common/common/blog"
"golang.org/x/net/context"
)
var (
_, classA, _ = net.ParseCIDR("10.0.0.0/8")
_, classA2, _ = net.ParseCIDR("9.0.0.0/8")
_, classAa, _ = net.ParseCIDR("100.64.0.0/10")
_, classB, _ = net.ParseCIDR("172.16.0.0/12")
_, classC, _ = net.ParseCIDR("192.168.0.0/16")
)
//RDiscover register and discover
type RDiscover struct {
isMaster bool
zkSubPath string
rd *RegisterDiscover.RegDiscover
clusterid string
proxy string
address string
metricPort uint
rootCxt context.Context
cancel context.CancelFunc
bcsLBServs []*types.LoadBalanceInfo
bcsLBLock sync.RWMutex
}
//NewRDiscover new a register discover object to register zookeeper
func NewRDiscover(zkserv, subPath, clusterid, proxy, address string, metricPort uint) *RDiscover {
return &RDiscover{
zkSubPath: subPath,
rd: RegisterDiscover.NewRegDiscoverEx(zkserv, 10*time.Second),
clusterid: clusterid,
proxy: proxy,
address: address,
metricPort: metricPort,
}
}
//Start the register and discover
func (r *RDiscover) Start() error {
//create root context
r.rootCxt, r.cancel = context.WithCancel(context.Background())
//start regdiscover
if err := r.rd.Start(); err != nil {
blog.Errorf("fail to start register and discover serv. err:%s", err.Error())
return err
}
//register loadbalance to bcs zk
if err := r.registerLoadBalance(); err != nil {
blog.Errorf("fail to register err:%s", err.Error())
return err
}
var bcsLoadbalanceEvent <-chan *RegisterDiscover.DiscoverEvent
bcsLBPath := types.BCS_SERV_BASEPATH + "/" + types.BCS_MODULE_LOADBALANCE + "/" + r.zkSubPath
bcsLoadbalanceEvent, err := r.rd.DiscoverService(bcsLBPath)
if err != nil {
blog.Errorf("fail to register discover for bcs loadbalance. err:%s", err.Error())
return err
}
blog.Infof("register bcs lb path %s discover success", bcsLBPath)
//here: discover other bcs services
go r.CheckMasterStatus()
for {
select {
case bcsLBEnv := <-bcsLoadbalanceEvent:
err = r.discoverBCSLBServ(bcsLBEnv.Server)
if err != nil {
blog.Warnf("discover bcs lb %v, err %s", bcsLBEnv.Server, err.Error())
}
case <-r.rootCxt.Done():
blog.Warn("register and discover serv done")
return nil
}
}
}
//Stop the register and discover
func (r *RDiscover) Stop() error {
r.cancel()
if err := r.rd.Stop(); err != nil {
return fmt.Errorf("register discover stop failed, err %s", err.Error())
}
return nil
}
//CheckMasterStatus timer to check master status
func (r *RDiscover) CheckMasterStatus() {
for {
r.bcsLBLock.Lock()
if len(r.bcsLBServs) > 0 {
if r.bcsLBServs[0].IP == r.address {
if !r.isMaster {
blog.Infof("#######Status chanaged, Self node become Master#############")
}
r.isMaster = true
} else {
r.isMaster = false
}
}
r.bcsLBLock.Unlock()
time.Sleep(5 * time.Second)
}
}
//IsMaster return a bool to indicate whether i am a master
func (r *RDiscover) IsMaster() bool {
return r.isMaster
}
//GetBCSLBServList get bcs lb as awselb/awsclb target
func (r *RDiscover) GetBCSLBServList() []types.LoadBalanceInfo {
r.bcsLBLock.Lock()
defer r.bcsLBLock.Unlock()
var rst []types.LoadBalanceInfo
for _, value := range r.bcsLBServs {
rst = append(rst, *value)
}
return rst
}
func (r *RDiscover) discoverBCSLBServ(servInfos []string) error {
blog.Debug(fmt.Sprintf("discover loadbalance(%v)", servInfos))
lbs := []*types.LoadBalanceInfo{}
for _, serv := range servInfos {
lb := new(types.LoadBalanceInfo)
if err := json.Unmarshal([]byte(serv), lb); err != nil {
blog.Warn("fail to do json unmarshal(%s), err:%s", serv, err.Error())
continue
}
lbs = append(lbs, lb)
}
r.bcsLBLock.Lock()
defer r.bcsLBLock.Unlock()
r.bcsLBServs = lbs
return nil
}
func (r *RDiscover) registerLoadBalance() error {
lbInfo := new(types.LoadBalanceInfo)
//need to judge getInnerIP() succeed or not, because must go ahead
lbInfo.IP = r.address
//metric port, let healthz check
lbInfo.Port = r.metricPort
lbInfo.MetricPort = r.metricPort
//include http must, may be include tcp ,https also
lbInfo.Scheme = "http"
lbInfo.Version = version.GetVersion()
lbInfo.Pid = os.Getpid()
lbInfo.Cluster = r.clusterid
data, err := json.Marshal(lbInfo)
if err != nil {
blog.Errorf("fail to marshal loadbalance info to json. err:%s", err.Error())
return err
}
path := r.getLBZookeeperParentPath() + "/" + lbInfo.IP
return r.rd.RegisterAndWatchService(path, data)
}
func (r *RDiscover) getLBZookeeperParentPath() string {
return types.BCS_SERV_BASEPATH + "/" + types.BCS_MODULE_LOADBALANCE + "/" + r.zkSubPath
}