https://github.com/serkan-ozal/leanser

AWS Lambda Cleaner - Cleanup resources on AWS Lambda container shutdown (timeout and/or spin-down)
https://github.com/serkan-ozal/leanser

Last synced: about 2 months ago
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AWS Lambda Cleaner - Cleanup resources on AWS Lambda container shutdown (timeout and/or spin-down)

• Host: GitHub
• URL: https://github.com/serkan-ozal/leanser
• Owner: serkan-ozal
• License: mit
• Created: 2022-09-30T12:59:48.000Z (almost 2 years ago)
• Default Branch: master
• Last Pushed: 2022-09-30T16:02:58.000Z (almost 2 years ago)
• Last Synced: 2024-07-28T09:11:39.074Z (about 2 months ago)
• Language: JavaScript
• Size: 51.8 KB
• Stars: 20
• Watchers: 4
• Forks: 2
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md
  • License: LICENSE

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README

        
# leanser

![build Status](https://github.com/serkan-ozal/leanser/actions/workflows/build.yml/badge.svg)

![npm version](https://badge.fury.io/js/leanser.svg)

![license](https://img.shields.io/badge/license-MIT-blue)

AWS Lambda Cleaner - Cleanup resources on AWS Lambda container shutdown (timeout and/or spin-down).

> :warning: You have `500 milliseconds` to complete all of your callbacks before function shutdown.

## Installation

You can add `leanser` package into your AWS Lambda function either by NPM package or by AWS Lambda layer as shown below:

### By NPM package

To install the middleware, you can use NPM:

```

npm install --save leanser

```

### By AWS Lambda Layer

You can also add `leanser` as layer into your AWS Lambda function.

```

arn:aws:lambda:${region}:273094347961:layer:leanser:${layer-version}

```

**Latest layer version:** ![leanser](https://api.globadge.com/v1/badgen/aws/lambda/layer/latest-version/us-east-1/273094347961/leanser) (badge powered by [Globadge serverless](https://www.globadge.com/badges/serverless))

**Note:** In the ARN above, you need to replace `${region}` with the actual AWS region you deployed your AWS Lambda function. 

## Usage

```javascript

const { register } = require('leanser');

async function myCleaner() {

    // Run your custom cleanup logic (close connections, etc ...)  

};

async function myAnotherCleaner() {

    // Run your another custom cleanup logic (close connections, etc ...)  

};

register(myCleaner, myAnotherCleaner);

exports.handler = async function(event, context) {

    // Do something meaningful

    return {

        statusCode: 200,

    }

};

```

## Configuration

* **Optionally**, you can disable/enable cleaner.

    - **By environment variable:**

      Set `LEANSER_ENABLE` environment variable to `false` to disable cleaner or to `true` (which is default) to enable cleaner back.

  ```

  LEANSER_ENABLE=false

  ```  

## Contributing

Everyone is very welcome to contribute to this repository.

Feel free to [raise issues](https://github.com/serkan-ozal/leanser/issues)

or to [submit Pull Requests](https://github.com/serkan-ozal/leanser/pulls).

## License

Licensed under [MIT License](LICENSE).