rate_thresholds.js

import http from "k6/http";
import {check} from "k6";
import { Rate } from "k6/metrics";

export let RequestErrorRate = new Rate("Request errors");

export let options = {
  vus: 50,
  duration: "3s",
  thresholds: {
    "Request errors": ["rate<0.1"]
  }
};

export default function() {
  const checkResult = check(http.get("http://httpbin.org"), {
    "status is 200": (r) => r.status == 200,
    "duration": (r) => r.timings.duration < 2000
  });
  RequestErrorRate.add(!checkResult);
}