SSM Paramter Store caching with Lambda

The setup is inspired by this blogpost.

Steps

1. Create a cdk.context.json file in the root of this project with the regtion (optional).

{
  "region": "us-east-1"
}

2. Run yarn (recommended) or npm install

3. Run yarn deploy to deploy the stack to your specified region. You can add a custom profile name if it is not default. You can learn about creating profiles using the aws-cli here.

4. You can now test the Lambda from the console by creating a test event and notice Lambda use the execution context to cache Paramter Store values.

Useful commands

• yarn build compile typescript to js
• yarn watch watch for changes and compile
• yarn test perform the jest unit tests
• yarn cdk deploy deploy this stack to your default AWS account/region
• yarn cdk diff compare deployed stack with current state
• yarn cdk synth emits the synthesized CloudFormation template