Thomas Step

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How To Clean CDK Assets

I recently started looking into my AWS bill more closely and I realized that I am paying for a lot more S3 storage than I thought I should be. Upon further investigation, it seems that the CDK stores a TON of assets in an S3 bucket but it never gets rid of the old things that are not being used anymore. This lead me into a search for how to determine which assets are valid to be cleaned up.

I stumbled across a CDK construct (kind of funny) that does exactly this. Judging by all the GitHub issues, I am not the first person to be upset about this. After deploying the construct I can say that it works and it’s saving me money. Thanks internet. My repo where I “implemented” this is here.

If you don’t want to follow links I guess I’ll explain it. You will need to create a new CDK app (cdk init app --language typescript), paste the following in the stack file created in the lib/ folder, and then run cdk deploy --all.

import * as cdk from 'aws-cdk-lib';
import { Schedule } from 'aws-cdk-lib/aws-events';
import { Construct } from 'constructs';
import { ToolkitCleaner } from 'cloudstructs/lib/toolkit-cleaner';

export class CdkS3CleanerStack extends cdk.Stack {
  constructor(scope: Construct, id: string, props?: cdk.StackProps) {
    super(scope, id, props);
    new ToolkitCleaner(this, 'ToolkitCleaner', {
      retainAssetsNewerThan: cdk.Duration.days(7),
      schedule: Schedule.rate(cdk.Duration.days(30)),
Categories: aws