Running k6 script for load tests returns an error

Question

I'm first time user of k6 and I've already manage to get an error when running the script:

"Request Failed [33merror[0m="Get https:///: stopped after 0 redirects"

Script k6.js:

import http from "k6/http";
import { sleep } from "k6";

export let options = {
 stages: [
    { duration: "30s", target: 20 },
    { duration: "1m30s", target: 10  },
    { duration: "20s", target: 0 },
  ]
};

export default function() {
  let res = http.get("https://<our_page_URL>/");
  check(res, {
    "status code MUST be 200": (res) => res.status == 200,
  }) || fail("status code was *not* 200");
  sleep(1);
}

Why do I get this error and what is the solution?

Answer 1

You have to set up the maxRedirects option; maxRedirects is the maximum number of HTTP redirects that k6 will follow before giving up on a request and erroring out with ("Get $PATH stopped after $MAX_REDIRECT_VALUE redirects")

You can pass the option as CLI argument or script options. More about this option at https://docs.k6.io/docs/options

export let options = {
    // Max redirects to follow (default is 10)
    maxRedirects: 10
};

The default is 10, so there is likely a bug skipping the default value being assigned.

This is a redirect example to test how it works.

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

export let options = {
    // Max redirects to follow (default is 10)
    maxRedirects: 5
};

export default function() {
    // If redirecting more than options.maxRedirects times, the last response will be returned
    let res = http.get("https://httpbin.org/redirect/6");
    check(res, {
        "is status 302": (r) => r.status === 302
    });

    // The number of redirects to follow can be controlled on a per-request level as well
    res = http.get("https://httpbin.org/redirect/1", {redirects: 1});
    console.log(res.status);
    check(res, {
        "is status 200": (r) => r.status === 200,
        "url is correct": (r) => r.url === "https://httpbin.org/get"
    });
}