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|
package http
import (
"strconv"
"github.com/prometheus/client_golang/prometheus"
handler "github.com/spiral/roadrunner/v2/pkg/worker_handler"
)
func (p *Plugin) MetricsCollector() []prometheus.Collector {
// p - implements Exporter interface (workers)
// other - request duration and count
return []prometheus.Collector{p, p.requestsExporter.requestDuration, p.requestsExporter.requestCounter}
}
func (p *Plugin) metricsCallback(event interface{}) {
switch e := event.(type) {
case handler.ResponseEvent:
p.requestsExporter.requestCounter.With(prometheus.Labels{
"status": strconv.Itoa(e.Response.Status),
}).Inc()
p.requestsExporter.requestDuration.With(prometheus.Labels{
"status": strconv.Itoa(e.Response.Status),
}).Observe(e.Elapsed().Seconds())
case handler.ErrorEvent:
p.requestsExporter.requestCounter.With(prometheus.Labels{
"status": "500",
}).Inc()
p.requestsExporter.requestDuration.With(prometheus.Labels{
"status": "500",
}).Observe(e.Elapsed().Seconds())
}
}
type workersExporter struct {
wm *prometheus.Desc
workersMemory uint64
}
func newWorkersExporter() *workersExporter {
return &workersExporter{
wm: prometheus.NewDesc("rr_http_workers_memory_bytes", "Memory usage by HTTP workers.", nil, nil),
workersMemory: 0,
}
}
func (p *Plugin) Describe(d chan<- *prometheus.Desc) {
// send description
d <- p.workersExporter.wm
}
func (p *Plugin) Collect(ch chan<- prometheus.Metric) {
// get the copy of the processes
workers := p.Workers()
// cumulative RSS memory in bytes
var cum uint64
// collect the memory
for i := 0; i < len(workers); i++ {
cum += workers[i].MemoryUsage
}
// send the values to the prometheus
ch <- prometheus.MustNewConstMetric(p.workersExporter.wm, prometheus.GaugeValue, float64(cum))
}
type requestsExporter struct {
requestCounter *prometheus.CounterVec
requestDuration *prometheus.HistogramVec
}
func newRequestsExporter() *requestsExporter {
return &requestsExporter{
requestCounter: prometheus.NewCounterVec(
prometheus.CounterOpts{
Name: "rr_http_request_total",
Help: "Total number of handled http requests after server restart.",
},
[]string{"status"},
),
requestDuration: prometheus.NewHistogramVec(
prometheus.HistogramOpts{
Name: "rr_http_request_duration_seconds",
Help: "HTTP request duration.",
},
[]string{"status"},
),
}
}
|
