Cloudwatch Auto Retention

Cloudwatch Auto Retention is an AWS CDK construct library that will check once a month if you have any Cloudwatch Log Groups in the region it is deployed with a never-expire retention and auto-fix this to one month. This is a cost-optimization as Cloudwatch Logs have a very high storage cost. If you need Cloudwatch logs for longer you should set an automated S3 export (cloudwatch-logs-s3-export is in the works 😚).

Getting started

TypeScript

Installation

NPM

npm install --save cloudwatch-auto-retention

yarn

yarn add cloudwatch-auto-retention

Usage

import * as cdk from '@aws-cdk/core';
import { CloudwatchAutoRetention } from 'cloudwatch-auto-retention';
import { RetentionDays } from 'aws-cdk-lib/aws-logs';
import { Schedule } from 'aws-cdk-lib/aws-events';

const mockApp = new cdk.App();
const stack = new cdk.Stack(mockApp, '');

new CloudwatchAutoRetention(stack, 'cloudwatch-auto-retention');

// With retention set
new CloudwatchAutoRetention(stack, 'cloudwatch-auto-retention', {
    retention: RetentionDays.ONE_MONTH
});

// With schedule for the Lambda function set
new CloudwatchAutoRetention(stack, 'cloudwatch-auto-retention', {
    schedule: Schedule.cron({ minute: '0', hour: '1', day: '1' })
});

Python

Installation

$ pip install cloudwatch-auto-retention

Usage

import aws_cdk.core as cdk
from cdk_cloudwatch_auto_retention import CloudwatchAutoRetention 

app = cdk.App()
stack = cdk.Stack(app, "")

CdkCloudwatchAutoRetention(stack, "cloudwatch-auto-retention")

Overview

A Cloudwatch cron rule will trigger a Lambda that will go over all Cloudwatch Log Groups and check if the retention is never-expire. If so, it will change it to one month default or whatever you set as retention.