[!NOTE] I made this primarily for my own needs: I am using it as a single entrypoint for all my side-projects, to make sure everything is working fine. Any monitoring service can use this endpoint to check if everything is ok. For example, when something goes wrong, I am directly pinged via Discord from UptimeRobot.

Ventourne

Introduction

Ventourne is a simple NuxtHub starter template that provides a simple healthcheck page for your needs. Inspired by Levelsio's Podcast with Lex Friedman and based on Allgood by @rameerez.

How it works?

It's a simple healthcheck page: the goal is to check the health of everything you need to keep an eye on.

Just put your healthchecks in server/routes/healthchecks/ and they will be automatically fetched and displayed on {yoururl.com}/healthcheck. You can give this URL {yoururl.com}/healthcheck?ssr to any monitoring service to check if everything is OK.

• (Optional) You can authorize only some users to access the healthchecks.
• (Optional) You can use token authentication to access this page.

It is also explained well here

Fully integrated with NuxtHub

This starter template is leveraging several NuxtHub features:

• 🗄️ NuxtHub Cache (to cache healthchecks results)
• 📦 NuxtHub Database with DrizzleORM (to store users and some healthchecks examples)
• 💻 NuxtHub Browser: You can easily use a Puppeteer instance in your healthchecks 🤯
• 🎨 NuxtUI
• 🔑 Nuxt Auth Utils

It is made to work like this:

1. You write simple checks you often need to make sure everything is working fine with your apps, businesses, etc. Some examples:
   • Check if you earned at least $1 in the last 12 hours on your Stripe account. If not, you probably have some issues.
   • Check you sent at least 1 mail to customers in the last 24 hours; if not, you probably have some issues.
   • Check your database is still working
   • Check your disk space usage is below 90% (if you are using a VPS instead of a Cloudflare worker)
   • Check if your third-party API integrations are responding within acceptable time limits
   • Check if SSL certificates are up to date and not expiring soon
   • Verify if API rate limits are not being exceeded
   • Verify that important scheduled tasks ran successfully (e.g., daily reports, backups)
   • Monitor for broken links on your website (Maybe with NuxtSEO Link Checker?)
   • Check if search functionality is returning relevant results
   • Verify that backups are being created and stored correctly
   • Live integration tests with Puppeteer
   • etc.
2. When you go on the page, it runs all the checks and displays the results. Some healthchecks are cached via Nitro's cache storage, thanks to the NuxtHub cache feature. So it is fully working with Cloudflare Workers KV
3. This /healthcheck?ssr endpoint can be utilized for monitoring your application's health through services like UptimeRobot or Pingdom. These monitoring tools will periodically access your healthcheck page, typically every few minutes, triggering the execution of all your defined health checks each time the page is fetched. If you need authentication, you can give /healthcheck?ssr&ventourne-token=token to the monitoring service.

Setup

Ensure to install the dependencies:

pnpm install

Next, set up a .env file based on the .env.example template. Modify the values as necessary.

Development Server

Launch the development server at http://localhost:3000:

pnpm run dev

To make sure remote cloudflare services are working, you can run:

npx nuxt dev --remote

Production

This application is intended for deployment on Cloudflare. You can effortlessly utilize NuxtHub Admin for a smooth deployment process or use the CLI:

npx nuxthub deploy

You will also need a Nuxt UI Pro License to build the application for production.

Configuration

Simple start

If you don't want to use any authentication, you can set the following environment variable:

NUXT_ENABLE_OAUTH=false

No need to set any other variables.

GitHub auth

You can log in with GitHub and authorize only specific users to access the healthchecks.

For this, you need to set the following environment variables:

NUXT_OAUTH_GITHUB_CLIENT_ID=
NUXT_OAUTH_GITHUB_CLIENT_SECRET=
NUXT_VENTOURNE_GITHUB_USERNAMES=username1,username2,etc # (if empty, every github user can access when authenticated)

Token auth

Or you can use the token authentication system, with a token in query params or in headers.

For this, you need to set the following environment variable:

NUXT_VENTOURNE_TOKEN=use-this-token-in-request-query-params-or-headers-to-bypass-authentication

Improvements

If you don't want to use external monitoring services such as UptimeRobot or Pingdom, we could be able to leverage Cloudflare Cron Triggers in the future to run healthchecks at scheduled times.

Some examples

Here are some examples of healthchecks you can create in server/routes/healthchecks/:

1. Simple GET check

import { defineHealthcheckEventHandler } from '~~/server/utils/healthcheck'

export default defineHealthcheckEventHandler(
  async () => {
    await $fetch('https://www.google.com')
    return true
  },
  {
    description: 'Can ping www.google.com ?',
    maxAge: 1, // cached for 1 second
  },
)

2. Cached Check

import { defineHealthcheckEventHandler } from '~~/server/utils/healthcheck'

export default defineHealthcheckEventHandler(
  async () => {
    return 'Successfully did nothing'
  },
  {
    description: 'cached for 15 seconds',
    maxAge: 15,
  },
)

3. Headless Browser Interaction Check

You can use Puppeteer to perform more complex checks in just a few lines of code.

import { defineHealthcheckEventHandler } from '~~/server/utils/healthcheck'

export default defineHealthcheckEventHandler(
  async () => {
    const { page } = await hubBrowser()
    await page.setViewport({ width: 1920, height: 1080 })
    await page.goto('https://nuxt.com', { waitUntil: 'domcontentloaded' })
    return 'Successfully went to nuxt.com with an headless browser'
  },
  {
    description: 'Can use a browser ? Cached for 10 minutes',
    maxAge: 60 * 10, // cached for 10 minutes
  },
)

The page instance is automatically closed after the response is sent.

4. Intentional Failure Check

To fail, you can throw an error or simply return false.

import { defineHealthcheckEventHandler } from '~~/server/utils/healthcheck'
export default defineHealthcheckEventHandler(
  async () => {
    await $fetch('https://www.google.com/404') // will automatically throw an Error here
    return true
  },
  {
    description: 'Can ping www.google.com/404 ?',
    maxAge: 1,
  },
)

import { defineHealthcheckEventHandler } from '~~/server/utils/healthcheck'
export default defineHealthcheckEventHandler(
  async () => {
    return false
  },
  {
    description: 'Will always fail',
    maxAge: 1,
  },
)

Creating Your Own Healthchecks

To create a new healthcheck:

1. Create a new file in the server/routes/healthchecks/ directory.
2. Use the defineHealthcheckEventHandler function to define your check.
3. Implement your check logic in the first argument function.
4. Provide options including a description and cache duration in the second argument.

Here's a template to get you started:

import { defineHealthcheckEventHandler } from '~~/server/utils/healthcheck'

export default defineHealthcheckEventHandler(
  async () => {
    // Your check logic here
    // Return true if the check passes, or a string message for more detail
    // Throw an error or return false if the check fails
  },
  {
    description: 'Description of your healthcheck',
    maxAge: 60, // Cache duration in seconds
  },
)

Inspirations / Thanks

• Levelsio's Podcast with Lex Friedman
• Allgood
• Gavarnie
• Laravel Health Check

License

MIT License