| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 ( |
| "strings" |
| |
| "github.com/prometheus/client_golang/prometheus" |
| ) |
| |
| type performanceMetrics struct { |
| Latencies *prometheus.HistogramVec |
| HTTPCodes *prometheus.CounterVec |
| Payload *prometheus.CounterVec |
| HTTPServerPanics *prometheus.CounterVec |
| } |
| |
| var _metrics *performanceMetrics |
| |
| const ( |
| _namespace = "kvrocks" |
| _subsystem = "controller" |
| ) |
| |
| // NewHistogramHelper was used to fast create and register prometheus histogram metric |
| func NewHistogramHelper(ns, subsystem, name string, buckets []float64, labels ...string) *prometheus.HistogramVec { |
| ns = strings.ReplaceAll(ns, "-", "_") |
| subsystem = strings.ReplaceAll(subsystem, "-", "_") |
| name = strings.ReplaceAll(name, "-", "_") |
| opts := prometheus.HistogramOpts{} |
| opts.Namespace = ns |
| opts.Subsystem = subsystem |
| opts.Name = name |
| opts.Help = name |
| opts.Buckets = buckets |
| histogram := prometheus.NewHistogramVec(opts, labels) |
| prometheus.MustRegister(histogram) |
| return histogram |
| } |
| |
| // NewCounterHelper was used to fast create and register prometheus counter metric |
| func NewCounterHelper(ns, subsystem, name string, labels ...string) *prometheus.CounterVec { |
| ns = strings.ReplaceAll(ns, "-", "_") |
| subsystem = strings.ReplaceAll(subsystem, "-", "_") |
| opts := prometheus.CounterOpts{} |
| opts.Namespace = ns |
| opts.Subsystem = subsystem |
| opts.Name = name |
| opts.Help = name |
| counters := prometheus.NewCounterVec(opts, labels) |
| prometheus.MustRegister(counters) |
| return counters |
| } |
| |
| func setupMetrics() { |
| labels := []string{"host", "uri", "method", "code"} |
| buckets := prometheus.ExponentialBuckets(1, 2, 16) |
| newHistogram := func(name string, labels ...string) *prometheus.HistogramVec { |
| return NewHistogramHelper(_namespace, _subsystem, name, buckets, labels...) |
| } |
| newCounter := func(name string, labels ...string) *prometheus.CounterVec { |
| return NewCounterHelper(_namespace, _subsystem, name, labels...) |
| } |
| _metrics = &performanceMetrics{ |
| Latencies: newHistogram("request_latency", labels...), |
| HTTPCodes: newCounter("http_code", labels...), |
| Payload: newCounter("http_payload", labels...), |
| } |
| } |
| |
| func Get() *performanceMetrics { |
| return _metrics |
| } |
| |
| func init() { |
| setupMetrics() |
| } |