/
sentinels.go
186 lines (158 loc) · 6.42 KB
/
sentinels.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
package exporter
import (
"regexp"
"strconv"
"strings"
"github.com/gomodule/redigo/redis"
"github.com/prometheus/client_golang/prometheus"
log "github.com/sirupsen/logrus"
)
func (e *Exporter) handleMetricsSentinel(ch chan<- prometheus.Metric, fieldKey string, fieldValue string) bool {
switch fieldKey {
case "sentinel_masters", "sentinel_tilt", "sentinel_running_scripts", "sentinel_scripts_queue_length", "sentinel_simulate_failure_flags":
val, _ := strconv.Atoi(fieldValue)
e.registerConstMetricGauge(ch, fieldKey, float64(val))
return true
}
if masterName, masterStatus, masterAddress, masterSlaves, masterSentinels, ok := parseSentinelMasterString(fieldKey, fieldValue); ok {
masterStatusNum := 0.0
if masterStatus == "ok" {
masterStatusNum = 1
}
e.registerConstMetricGauge(ch, "sentinel_master_status", masterStatusNum, masterName, masterAddress, masterStatus)
e.registerConstMetricGauge(ch, "sentinel_master_slaves", masterSlaves, masterName, masterAddress)
e.registerConstMetricGauge(ch, "sentinel_master_sentinels", masterSentinels, masterName, masterAddress)
return true
}
return false
}
func (e *Exporter) extractSentinelMetrics(ch chan<- prometheus.Metric, c redis.Conn) {
masterDetails, err := redis.Values(doRedisCmd(c, "SENTINEL", "MASTERS"))
if err != nil {
log.Debugf("Error getting sentinel master details %s:", err)
return
}
log.Debugf("Sentinel master details: %#v", masterDetails)
for _, masterDetail := range masterDetails {
masterDetailMap, err := redis.StringMap(masterDetail, nil)
if err != nil {
log.Debugf("Error getting masterDetailmap from masterDetail: %s, err: %s", masterDetail, err)
continue
}
masterName, ok := masterDetailMap["name"]
if !ok {
continue
}
masterIp, ok := masterDetailMap["ip"]
if !ok {
continue
}
masterPort, ok := masterDetailMap["port"]
if !ok {
continue
}
masterAddr := masterIp + ":" + masterPort
masterCkquorumMsg, err := redis.String(doRedisCmd(c, "SENTINEL", "CKQUORUM", masterName))
log.Debugf("Sentinel ckquorum status for master %s: %s %s", masterName, masterCkquorumMsg, err)
masterCkquorumStatus := 1
if err != nil {
masterCkquorumStatus = 0
masterCkquorumMsg = err.Error()
}
e.registerConstMetricGauge(ch, "sentinel_master_ckquorum_status", float64(masterCkquorumStatus), masterName, masterCkquorumMsg)
masterCkquorum, _ := strconv.ParseFloat(masterDetailMap["ckquorum"], 64)
masterFailoverTimeout, _ := strconv.ParseFloat(masterDetailMap["failover-timeout"], 64)
masterParallelSyncs, _ := strconv.ParseFloat(masterDetailMap["parallel-syncs"], 64)
masterDownAfterMs, _ := strconv.ParseFloat(masterDetailMap["down-after-milliseconds"], 64)
e.registerConstMetricGauge(ch, "sentinel_master_setting_ckquorum", masterCkquorum, masterName, masterAddr)
e.registerConstMetricGauge(ch, "sentinel_master_setting_failover_timeout", masterFailoverTimeout, masterName, masterAddr)
e.registerConstMetricGauge(ch, "sentinel_master_setting_parallel_syncs", masterParallelSyncs, masterName, masterAddr)
e.registerConstMetricGauge(ch, "sentinel_master_setting_down_after_milliseconds", masterDownAfterMs, masterName, masterAddr)
sentinelDetails, _ := redis.Values(doRedisCmd(c, "SENTINEL", "SENTINELS", masterName))
log.Debugf("Sentinel details for master %s: %s", masterName, sentinelDetails)
e.processSentinelSentinels(ch, sentinelDetails, masterName, masterAddr)
slaveDetails, _ := redis.Values(doRedisCmd(c, "SENTINEL", "SLAVES", masterName))
log.Debugf("Slave details for master %s: %s", masterName, slaveDetails)
e.processSentinelSlaves(ch, slaveDetails, masterName, masterAddr)
}
}
func (e *Exporter) processSentinelSentinels(ch chan<- prometheus.Metric, sentinelDetails []interface{}, labels ...string) {
// If we are here then this master is in ok state
masterOkSentinels := 1
for _, sentinelDetail := range sentinelDetails {
sentinelDetailMap, err := redis.StringMap(sentinelDetail, nil)
if err != nil {
log.Debugf("Error getting sentinelDetailMap from sentinelDetail: %s, err: %s", sentinelDetail, err)
continue
}
sentinelFlags, ok := sentinelDetailMap["flags"]
if !ok {
continue
}
if strings.Contains(sentinelFlags, "o_down") {
continue
}
if strings.Contains(sentinelFlags, "s_down") {
continue
}
masterOkSentinels = masterOkSentinels + 1
}
e.registerConstMetricGauge(ch, "sentinel_master_ok_sentinels", float64(masterOkSentinels), labels...)
}
func (e *Exporter) processSentinelSlaves(ch chan<- prometheus.Metric, slaveDetails []interface{}, labels ...string) {
masterOkSlaves := 0
for _, slaveDetail := range slaveDetails {
slaveDetailMap, err := redis.StringMap(slaveDetail, nil)
if err != nil {
log.Debugf("Error getting slavedetailMap from slaveDetail: %s, err: %s", slaveDetail, err)
continue
}
slaveFlags, ok := slaveDetailMap["flags"]
if !ok {
continue
}
if strings.Contains(slaveFlags, "o_down") {
continue
}
if strings.Contains(slaveFlags, "s_down") {
continue
}
masterOkSlaves = masterOkSlaves + 1
}
e.registerConstMetricGauge(ch, "sentinel_master_ok_slaves", float64(masterOkSlaves), labels...)
}
/*
valid examples:
master0:name=user03,status=sdown,address=192.169.2.52:6381,slaves=1,sentinels=5
master1:name=user02,status=ok,address=192.169.2.54:6380,slaves=1,sentinels=5
*/
func parseSentinelMasterString(master string, masterInfo string) (masterName string, masterStatus string, masterAddr string, masterSlaves float64, masterSentinels float64, ok bool) {
ok = false
if matched, _ := regexp.MatchString(`^master\d+`, master); !matched {
return
}
matchedMasterInfo := make(map[string]string)
for _, kvPart := range strings.Split(masterInfo, ",") {
x := strings.Split(kvPart, "=")
if len(x) != 2 {
log.Errorf("Invalid format for sentinel's master string, got: %s", kvPart)
continue
}
matchedMasterInfo[x[0]] = x[1]
}
masterName = matchedMasterInfo["name"]
masterStatus = matchedMasterInfo["status"]
masterAddr = matchedMasterInfo["address"]
masterSlaves, err := strconv.ParseFloat(matchedMasterInfo["slaves"], 64)
if err != nil {
log.Debugf("parseSentinelMasterString(): couldn't parse slaves value, got: %s, err: %s", matchedMasterInfo["slaves"], err)
return
}
masterSentinels, err = strconv.ParseFloat(matchedMasterInfo["sentinels"], 64)
if err != nil {
log.Debugf("parseSentinelMasterString(): couldn't parse sentinels value, got: %s, err: %s", matchedMasterInfo["sentinels"], err)
return
}
ok = true
return
}