本文主要是介绍prom-client使用，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
prom-client
metric.ts
import {Counter,Histogram,Gauge,Summary,Pushgateway,Registry,
} from 'prom-client';type MetricData = {name: string;labels: Record<string, string>;labelNames: string[];type: string;help: string;value?: number;buckets?: number[];percentiles?: number[];
};export enum MetricType {CounterType = 'counter',HistogramType = 'histogram',GaugeType = 'gauge',SummaryType = 'summary',
}const register = new Registry();// 上报到平台
export async function pushGateway() {try {const gateway = new Pushgateway('https://xxx',[],register);const { resp, body } = await gateway.push({ jobName: 'pipeline test' });console.log(`push gateway successfully, status code is ${(resp as any).statusCode}, body is ${body}`);} catch (err) {console.log('push gateway failed:', err);}
}// 创建指标类别
function createCounter(metricData: MetricData) {const { name, help, labelNames } = metricData;let counter = register.getSingleMetric(name) as Counter<string>;if (!counter) {counter = new Counter({name,help,labelNames,registers: [register],});}return counter;
}function createHistogram(metricData: MetricData) {const { name, help, labelNames, buckets } = metricData;let histogram = register.getSingleMetric(name) as Histogram<string>;if (!histogram) {histogram = new Histogram({name,help,labelNames,buckets,registers: [register],});}return histogram;
}function createSummary(metricData: MetricData) {const { name, help, labelNames, percentiles } = metricData;let summary = register.getSingleMetric(name) as Summary<string>;if (!summary) {summary = new Summary({name,help,labelNames,percentiles,registers: [register],});}return summary;
}function createGauge(metricData: MetricData) {const { name, help, labelNames } = metricData;let gauge = register.getSingleMetric(name) as Gauge<string>;if (!gauge) {gauge = new Gauge({name,help,labelNames,registers: [register],});}return gauge;
}export function handleMetric(metricData: MetricData) {const { type: metricType, value, labels } = metricData;const newValue = value || 1;if (metricType === MetricType.CounterType) {const counter = createCounter(metricData);register.registerMetric(counter);counter.inc(labels, newValue);} else if (metricType === MetricType.HistogramType) {const histogram = createHistogram(metricData);register.registerMetric(histogram);histogram.observe(labels, newValue);} else if (metricType === MetricType.SummaryType) {const summary = createSummary(metricData);register.registerMetric(summary);summary.observe(labels, newValue);} else if (metricType === MetricType.GaugeType) {const gauge = createGauge(metricData);register.registerMetric(gauge);gauge.set(labels, newValue);}
}
使用：
async function collectMetrics(name: string) {try {// 先获取指标原始数据// 比如需要掉接口拉取// await getList()...const labels = {labels: {name,env},labelNames: ['name','env',],};const counterMetric = {name: 'pipeline_run_total',help: 'pipeline run total',type: MetricType.CounterType,...labels,};const histogramMetric = {name: 'pipeline_run_duration',help: 'pipeline run finished',value: duration,buckets: [30000, 60000, 75000, 90000, 105000, 120000, 135000, 150000, 165000,180000, 195000, 210000, 225000, 240000, 270000, 300000, 330000,360000,],type: MetricType.HistogramType,...labels,};// 处理指标[counterMetric, histogramMetric].forEach((metric) =>handleMetric(metric));}} catch (err) {// err}
}(async () => {// collect metricsconst testNames=['test1','test2']await Promise.all(testNames.map((name) => collectMetrics(name)));// export to metric storeawait pushGateway();
})().catch((e) => console.log(e.message || e))
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