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https://github.com/gkampitakis/fastify-custom-healthcheck
Fastify plugin to add health route in your server that asserts custom functions
https://github.com/gkampitakis/fastify-custom-healthcheck
fastify fastify-plugin healthcheck npm-package
Last synced: 3 months ago
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Fastify plugin to add health route in your server that asserts custom functions
- Host: GitHub
- URL: https://github.com/gkampitakis/fastify-custom-healthcheck
- Owner: gkampitakis
- License: mit
- Created: 2020-07-29T06:12:22.000Z (over 4 years ago)
- Default Branch: master
- Last Pushed: 2023-06-05T10:57:17.000Z (over 1 year ago)
- Last Synced: 2024-10-10T22:02:10.111Z (3 months ago)
- Topics: fastify, fastify-plugin, healthcheck, npm-package
- Language: JavaScript
- Homepage: https://www.npmjs.com/package/fastify-custom-healthcheck
- Size: 54.7 KB
- Stars: 16
- Watchers: 3
- Forks: 4
- Open Issues: 4
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# Fastify Custom Healthcheck
[](https://github.com/standard/semistandard)
[](https://travis-ci.com/gkampitakis/fastify-custom-healthcheck)
`fastify-custom-healthcheck` is a plugin for creating a health route with custom evaluations.
## Install
```bash
npm i fastify-custom-healthcheck
```
## Usage
Require the module and just register it as any other fastify plugin. From `fastify-custom-healthcheck` on decorator is going to be added to your server for adding custom health checks.
```javascript
const fastify = require('fastify')();
const customHealthCheck = require('fastify-custom-healthCheck');
fastify.register(customHealthCheck, options).then(() => {
fastify.addHealthCheck('metric', () => {
return new Promise((resolve) => setTimeout(resolve, 5000));
});
});
fastify.listen(3000);
```
## API
### register plugin
```javascript
fastify.register(customHealthCheck, {
path: '/health/check', // default health
info: {}, // custom information object
});
```
### register options
- `path`: path where you can reach health check route.
- default value: `'/health'`.
- `info`: object where you can define custom information you would like to include in healthcheck response object.
- exposeFailure: Flag that enables additional information to be presented in health check object when a check fails.
- default value: `false`
- schema: If set to true, default schema is used for the route definition, if to false - no schema. If object is passed, it will be used as a schema. This can be used to enable support for custom type providers, e. g. zod or typebox.
- default value: `true`
### Decorator
After registering plugin you can use the decorator for adding custom health checks.
```javascript
fastify.addHealthCheck(label, () => {}, { value: true });
```
### decorator options
- value: If you add on `addHealthCheck` a value, when computing health check an equality check happens between evaluation and the value returned by the health check function. If the values are different health check fails.
## Example response
```json
{
"healthChecks": {
"mongo": {
"status": "FAIL",
"reason": "MongoNetworkError: failed to connect to server [localhost:27017] on first connect [Error: connect ECONNREFUSED 127.0.0.1:27017\n at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1144:16) {\n name: 'MongoNetworkError'\n}]"
},
"kafka": "HEALTHY",
"redis": "HEALTHY"
},
"stats": {
"creationTime": "2020-08-04T19:16:29.766Z",
"uptime": 0.303361107,
"memory": {
"rss": 50102272,
"heapTotal": 29270016,
"heapUsed": 16499104,
"external": 20754444,
"arrayBuffers": 19273278
}
},
"info": {
"example": "Response",
}
}
```
## Acknowledgements
This module is inspired by [server-health](https://www.npmjs.com/package/server-health) and the need of having this functionality in fastify.
### Example
You can also check an [example](./example) usage.
### Issues
For any [issues](https://github.com/gkampitakis/fastify-custom-healthcheck/issues).
## License
MIT License