-
Notifications
You must be signed in to change notification settings - Fork 250
/
cmd.go
194 lines (171 loc) · 5.22 KB
/
cmd.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
/*
* 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 healthcheck
import (
"bytes"
"fmt"
"strings"
"time"
"github.com/Tencent/bk-bcs/bcs-mesos/bcs-container-executor/logs"
dockerclient "github.com/fsouza/go-dockerclient"
"golang.org/x/net/context"
)
//NewCommandChecker create http checker
func NewCommandChecker(cmd string, endpoint string, mechanism *TimeMechanism) (Checker, error) {
if mechanism.IntervalSeconds <= mechanism.TimeoutSeconds {
return nil, fmt.Errorf("Interval Seconds must larger than Timeout Seconds")
}
cxt, cancel := context.WithCancel(context.Background())
checker := &CommandChecker{
CheckerStat: CheckerStat{
Failures: 0,
Ticks: 0,
ConsecutiveFailures: 0,
Healthy: true,
},
cmd: cmd,
endpoint: endpoint,
isPause: false,
cxt: cxt,
canceler: cancel,
mechanism: mechanism,
}
client, err := dockerclient.NewClient(endpoint)
if err != nil {
return nil, err
}
checker.client = client
return checker, nil
}
//CommandChecker check for http protocol health check
type CommandChecker struct {
CheckerStat
containerId string //container id
cmd string //command value
endpoint string //docker.sock
client *dockerclient.Client
isPause bool //pause checker
cxt context.Context //context to control exit
canceler context.CancelFunc //canceler
mechanism *TimeMechanism //time config for checker
}
func (check *CommandChecker) IsStarting() bool {
return check.Started
}
//SetHost setting container_id
func (check *CommandChecker) SetHost(containerid string) {
check.containerId = containerid
}
//Start start checker
func (check *CommandChecker) Start() {
check.Started = true
check.StartPoint = time.Now()
time.Sleep(time.Duration(int64(check.mechanism.GracePeriodSeconds)) * time.Second)
check.check()
tick := time.NewTicker(time.Duration(int64(check.mechanism.IntervalSeconds)) * time.Second)
defer tick.Stop()
for {
select {
case <-check.cxt.Done():
logs.Infof("CommandChecker container %s command %s ask to exit", check.containerId, check.cmd)
return
case check.LastCheck = <-tick.C:
if check.isPause {
continue
}
check.check()
}
}
}
func (check *CommandChecker) check() {
check.Ticks++
healthy := check.ReCheck()
//notGrace := int(check.LastCheck.Unix()-check.StartPoint.Unix()) > check.mechanism.GracePeriodSeconds
//if !healthy && notGrace {
if !healthy {
check.LastFailure = check.LastCheck
check.ConsecutiveFailures++
check.Healthy = false
logs.Infof("CommandChecker container %s command %s become **Unhealthy**", check.containerId, check.cmd)
} else {
check.Healthy = true
check.ConsecutiveFailures = 0
}
}
//Stop stop checker
func (check *CommandChecker) Stop() {
check.canceler()
}
//ReCheck ask checker to check
func (check *CommandChecker) ReCheck() bool {
cmds := strings.Split(strings.TrimSpace(check.cmd), " ")
//create exec with command
createOpt := dockerclient.CreateExecOptions{
AttachStdin: true,
AttachStdout: true,
AttachStderr: true,
Tty: false,
Cmd: cmds,
Container: check.containerId,
}
logs.Infof("create command healthcheck(%v)", cmds)
exeInst, err := check.client.CreateExec(createOpt)
if err != nil {
logs.Errorf("CommandChecker CreateExec container %s command %s error %s",
check.containerId, check.cmd, err.Error())
return false
}
//start exec
var outBuf bytes.Buffer
var errBuf bytes.Buffer
startOpt := dockerclient.StartExecOptions{
OutputStream: &outBuf,
ErrorStream: &errBuf,
}
err = check.client.StartExec(exeInst.ID, startOpt)
if err != nil {
logs.Errorf("CommandChecker StartExec container %s command %s error %s",
check.containerId, check.cmd, err.Error())
return false
}
ins, err := check.client.InspectExec(exeInst.ID)
if err != nil {
logs.Errorf("CommandChecker InspectExec container %s command %s error %s",
check.containerId, check.cmd, err.Error())
return false
}
if ins.ExitCode == 0 {
return true
}
logs.Errorf("CommandChecker exec container %s command %s failed: stdout(%s), stderr(%s)",
check.containerId, check.cmd, string(outBuf.Bytes()), string(errBuf.Bytes()))
return false
}
//Pause pause check
func (check *CommandChecker) Pause() error {
check.isPause = true
return nil
}
//Resume arouse checker
func (check *CommandChecker) Resume() error {
check.isPause = false
return nil
}
//Name get check name
func (check *CommandChecker) Name() string {
return CommandHealthcheck
}
//Relation checker relative to container
func (check *CommandChecker) Relation() string {
return check.containerId
}