프로메테우스 모니터링

출처

https://ichi.pro/ko/prometheus-mich-grafanaleul-sayonghan-node-js-aepeullikeisyeon-moniteoling-194123578535907

 

const http = require('http') const url = require('url') const client = require('prom-client') // Create a Registry which registers the metrics const register = new client.Registry() // Add a default label which is added to all metrics register.setDefaultLabels({   app: 'example-nodejs-app' }) // Enable the collection of default metrics client.collectDefaultMetrics({ register }) // Create a histogram metric const httpRequestDurationMicroseconds = new client.Histogram({   name: 'http_request_duration_seconds',   help: 'Duration of HTTP requests in microseconds',   labelNames: ['method', 'route', 'code'],   buckets: [0.1, 0.3, 0.5, 0.7, 1, 3, 5, 7, 10] }) // Register the histogram register.registerMetric(httpRequestDurationMicroseconds) // Define the HTTP server const server = http.createServer(async (req, res) => {     // Start the timer   const end = httpRequestDurationMicroseconds.startTimer() // Retrieve route from request object   const route = url.parse(req.url).pathname if (route === '/metrics') {     // Return all metrics the Prometheus exposition format     res.setHeader('Content-Type', register.contentType)     res.end(register.metrics())   } // End timer and add labels   end({ route, code: res.statusCode, method: req.method }) }) // Start the HTTP server which exposes the metrics on http://localhost:8080/metrics server.listen(8080)

nodejs server.js

 

프로메테우스 설치 

#apt install prometheus

#cd /etc/prometheus

#vi prometheus.yml

global:   scrape_interval: 5s scrape_configs:   - job_name: "example-nodejs-app"     static_configs:       - targets: ["localhost:8080"]

#service prometheus restart

 

prometheus_http_request_duration_seconds_bucket

프로메테우스 실행 완료  

 

Grafana

#cd /etc/prometheus

#vi datasources.ym

apiVersion: 1 datasources:   - name: Prometheus     type: prometheus     access: proxy     orgId: 1     url: http://docker.for.mac.host.internal:9090     basicAuth: false     isDefault: true     editable: true

 

docker run --rm -p 3000:3000 \   -e GF_AUTH_DISABLE_LOGIN_FORM=true \   -e GF_AUTH_ANONYMOUS_ENABLED=true \   -e GF_AUTH_ANONYMOUS_ORG_ROLE=Admin \   -v `pwd`/datasources.yml://etc/prometheus \   grafana/grafana-enterprise:8.3.6-ubuntu