mirror of https://github.com/k3s-io/k3s
100 lines
3.0 KiB
Go
100 lines
3.0 KiB
Go
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// Copyright 2015 The etcd Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package v2http
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import (
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"strconv"
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"time"
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"net/http"
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"go.etcd.io/etcd/etcdserver/api/v2error"
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"go.etcd.io/etcd/etcdserver/api/v2http/httptypes"
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"go.etcd.io/etcd/etcdserver/etcdserverpb"
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"github.com/prometheus/client_golang/prometheus"
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)
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var (
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incomingEvents = prometheus.NewCounterVec(
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prometheus.CounterOpts{
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Namespace: "etcd",
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Subsystem: "http",
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Name: "received_total",
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Help: "Counter of requests received into the system (successfully parsed and authd).",
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}, []string{"method"})
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failedEvents = prometheus.NewCounterVec(
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prometheus.CounterOpts{
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Namespace: "etcd",
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Subsystem: "http",
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Name: "failed_total",
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Help: "Counter of handle failures of requests (non-watches), by method (GET/PUT etc.) and code (400, 500 etc.).",
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}, []string{"method", "code"})
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successfulEventsHandlingSec = prometheus.NewHistogramVec(
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prometheus.HistogramOpts{
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Namespace: "etcd",
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Subsystem: "http",
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Name: "successful_duration_seconds",
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Help: "Bucketed histogram of processing time (s) of successfully handled requests (non-watches), by method (GET/PUT etc.).",
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// lowest bucket start of upper bound 0.0005 sec (0.5 ms) with factor 2
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// highest bucket start of 0.0005 sec * 2^12 == 2.048 sec
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Buckets: prometheus.ExponentialBuckets(0.0005, 2, 13),
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}, []string{"method"})
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)
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func init() {
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prometheus.MustRegister(incomingEvents)
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prometheus.MustRegister(failedEvents)
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prometheus.MustRegister(successfulEventsHandlingSec)
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}
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func reportRequestReceived(request etcdserverpb.Request) {
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incomingEvents.WithLabelValues(methodFromRequest(request)).Inc()
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}
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func reportRequestCompleted(request etcdserverpb.Request, startTime time.Time) {
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method := methodFromRequest(request)
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successfulEventsHandlingSec.WithLabelValues(method).Observe(time.Since(startTime).Seconds())
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}
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func reportRequestFailed(request etcdserverpb.Request, err error) {
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method := methodFromRequest(request)
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failedEvents.WithLabelValues(method, strconv.Itoa(codeFromError(err))).Inc()
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}
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func methodFromRequest(request etcdserverpb.Request) string {
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if request.Method == "GET" && request.Quorum {
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return "QGET"
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}
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return request.Method
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}
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func codeFromError(err error) int {
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if err == nil {
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return http.StatusInternalServerError
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}
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switch e := err.(type) {
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case *v2error.Error:
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return e.StatusCode()
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case *httptypes.HTTPError:
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return e.Code
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default:
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return http.StatusInternalServerError
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}
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}
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