forked from tikv/pd
-
Notifications
You must be signed in to change notification settings - Fork 0
/
metricutil.go
88 lines (74 loc) · 2.27 KB
/
metricutil.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
// Copyright 2016 PingCAP, Inc.
//
// 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,
// See the License for the specific language governing permissions and
// limitations under the License.
package metricutil
import (
"time"
"unicode"
log "github.com/pingcap/log"
"github.com/pingcap/pd/pkg/typeutil"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/push"
"go.uber.org/zap"
)
const zeroDuration = time.Duration(0)
// MetricConfig is the metric configuration.
type MetricConfig struct {
PushJob string `toml:"job" json:"job"`
PushAddress string `toml:"address" json:"address"`
PushInterval typeutil.Duration `toml:"interval" json:"interval"`
}
func runesHasLowerNeighborAt(runes []rune, idx int) bool {
if idx > 0 && unicode.IsLower(runes[idx-1]) {
return true
}
if idx+1 < len(runes) && unicode.IsLower(runes[idx+1]) {
return true
}
return false
}
func camelCaseToSnakeCase(str string) string {
runes := []rune(str)
length := len(runes)
var ret []rune
for i := 0; i < length; i++ {
if i > 0 && unicode.IsUpper(runes[i]) && runesHasLowerNeighborAt(runes, i) {
ret = append(ret, '_')
}
ret = append(ret, unicode.ToLower(runes[i]))
}
return string(ret)
}
// prometheusPushClient pushs metrics to Prometheus Pushgateway.
func prometheusPushClient(job, addr string, interval time.Duration) {
for {
err := push.FromGatherer(
job, push.HostnameGroupingKey(),
addr,
prometheus.DefaultGatherer,
)
if err != nil {
log.Error("could not push metrics to Prometheus Pushgateway", zap.Error(err))
}
time.Sleep(interval)
}
}
// Push metircs in background.
func Push(cfg *MetricConfig) {
if cfg.PushInterval.Duration == zeroDuration || len(cfg.PushAddress) == 0 {
log.Info("disable Prometheus push client")
return
}
log.Info("start Prometheus push client")
interval := cfg.PushInterval.Duration
go prometheusPushClient(cfg.PushJob, cfg.PushAddress, interval)
}