k6_script.js

import http from "k6/http";
import { check } from "k6";
import { Trend, Rate, Counter, Gauge } from "k6/metrics";

export let TrendRTT = new Trend("RTT");
export let RateContentOK = new Rate("ContentOK");
export let TrackRate = new Rate("TrackRate");
export let GaugeContentSize = new Gauge("ContentSize");
export let GaugeResponseTime = new Gauge("ResponseTime");
export let CounterErrors = new Counter("Errors");
export let CounterRequests = new Counter("Requests");
export let maxResponseTime = 0.0;

export let options = {
  // Add VU ramping option, total test length is 3m
  stages: [
    // Ramp up from 1 VU to 25 VUs for 1 minute
    { target: 25, duration: "30s" },

    // Stay constant at 25 VUs for 1 minute
    { target: 25, duration: "10s" },

    // Ramp down from 25 VUs to 0 VUs for 1 minute
    { target: 0, duration: "30s" }
  ],
  thresholds: {
    RTT: ["p(99)<300", "p(70)<250", "avg<200", "med<150", "min<100"],
    ContentOK: ["rate>0.95"],
    ContentSize: ["value<4000"],
    Errors: ["count<100"]
  },
  maxRedirects: 0
};

export default function() {
  let res = http.get("https://www.myapp.test/");
  TrendRTT.add(res.timings.looking_up + res.timings.connecting);
  RateContentOK.add(res.status == 200);
  GaugeContentSize.add(res.body.length);
  CounterErrors.add(!res.status == 200);
  CounterRequests.add(1);

  maxResponseTime = Math.max(maxResponseTime, res.timings.duration);
  GaugeResponseTime.add(maxResponseTime);

  let passed = check(res, { "status is 200": r => r.status === 200 });
  TrackRate.add(passed);
}