-
Notifications
You must be signed in to change notification settings - Fork 805
/
chaos-dashboard.go
68 lines (55 loc) · 2.21 KB
/
chaos-dashboard.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
// Copyright 2021 Chaos Mesh Authors.
//
// 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 metrics
import (
"strconv"
"time"
"github.com/gin-gonic/gin"
"github.com/prometheus/client_golang/prometheus"
)
const chaosDashboardSubsystem = "chaos_dashboard"
// ChaosDashboardMetricsCollector implements prometheus.Collector interface
type ChaosDashboardMetricsCollector struct {
httpRequestDuration *prometheus.HistogramVec
}
// NewChaosDashboardMetricsCollector initializes metrics and collector
func NewChaosDashboardMetricsCollector(engine *gin.Engine, registry *prometheus.Registry) *ChaosDashboardMetricsCollector {
collector := &ChaosDashboardMetricsCollector{
httpRequestDuration: prometheus.NewHistogramVec(prometheus.HistogramOpts{
Subsystem: chaosDashboardSubsystem,
Name: "http_request_duration_seconds",
Help: "Time histogram for each HTTP query",
}, []string{"path", "method", "status"}),
}
engine.Use(collector.ginMetricsCollector())
registry.MustRegister(collector)
return collector
}
// Describe implements the prometheus.Collector interface.
func (collector *ChaosDashboardMetricsCollector) Describe(ch chan<- *prometheus.Desc) {
collector.httpRequestDuration.Describe(ch)
}
// Collect implements the prometheus.Collector interface.
func (collector *ChaosDashboardMetricsCollector) Collect(ch chan<- prometheus.Metric) {
collector.httpRequestDuration.Collect(ch)
}
func (collector *ChaosDashboardMetricsCollector) ginMetricsCollector() gin.HandlerFunc {
return func(ctx *gin.Context) {
begin := time.Now()
ctx.Next()
collector.httpRequestDuration.WithLabelValues(ctx.FullPath(), ctx.Request.Method, strconv.Itoa(ctx.Writer.Status())).
Observe(time.Since(begin).Seconds())
}
}