OpenTelemetry Test App

This is a small Next.js app used for testing and demoing the Checkly OpenTelemetry integration. It randomly throws errors, so we can get some traces quickly. Have a look at the app/page.tsx file to see how it does this. This demo repo already comes with the necessary instrumentation code. You can find it in instrumentation.ts.

Deploying and Sending traces

1. Deploy this app to a personal / Hobby Vercel by clicking the button below.

2. Enable OTel and create an OTel API key in the Checkly app as per our own docs.

3. Add the following environment variables to your Vercel project settings. also as per the docs.

   • OTEL_EXPORTER_OTLP_HEADERS="authorization=<otel-api-key>"
   • OTEL_EXPORTER_OTLP_ENDPOINT=https://otel.eu-west-1.checklyhq.com

   You might need to redeploy your Vercel deployment after adding these environment variables.

4. Create a check targeting the Vercel deployment URL. A check is provided in the __checks__ folder, just tweak the URL:

   import { test, expect } from '@playwright/test'
     test('Custom Browser Check', async ({ page }) => {
     const response = await page.goto('MY_VERCEL_DEPLOYMENT_URL') // <- Change this
     expect(response?.status()).toBeLessThan(400)
   })

   Run the regular npx checkly test and npx checkly deploy to create and deploy the check.

5. Now, with each check run, you should see traces in your Checkly account as part of the check result. This works for test sessions, monitoring checks and adhoc results in the editor.

Development

First, run the development server:

npm run dev
# or
yarn dev
# or
pnpm dev
# or
bun dev

Open http://localhost:3000 with your browser to see the result. You can start editing the page by modifying app/page.tsx. The page auto-updates as you edit the file.