This is a brief example how to define a Lambda function with bash using Amazon Linux 2 based Custom Runtime and Container Image Support (relesed in re:Invent 2020).

See the blog post for more information: aripalo.com/blog/2020/aws-lambda-container-image-support/

I have implemented the instructions in bash. This makes it much easier to see the process flow. Also it may serve as a decent foundation for a more advanced pipeline (it implements a rudimentary local/staging/production)

Modify the ENV-vars in pipeline.sh

pipeline.sh build staging

• Builds build local docker image.
• Tests the container image by spinning up an instance, sending a CURL request, then destroying the instance.

You can CTRL+c at the prompt and docker exec -it ${container_id} /bin/sh to get into the box if you like.

pipeline.sh deploy staging

• Creates a repo if it doesn't exist
• Logs into AWS ECR Docker repository
• Tags Docker Image (specific format, so AWS Lambda can find it)
• Pushes image to remote
• Tests
  • If there is a running lambda function with this name, delete it.
  • Create lambda function
  • test against endpoint, printing response

(Very briefly, again see the blog post for more.)

cd src

docker build -t lambda-container-demo .
docker run -p 9000:8080 lambda-container-demo:latest

In another terminal call:

curl -XPOST \
"http://localhost:9000/2015-03-31/functions/function/invocations" \
-d 'Hello from Container Lambda!'

cd src

# Build the image
docker build -t lambda-container-demo .

# Create repository
aws ecr create-repository --repository-name lambda-container-demo --image-scanning-configuration scanOnPush=true

# Tag it
docker tag lambda-container-demo:latest 123412341234.dkr.ecr.eu-west-1.amazonaws.com/lambda-container-demo:latest

# Login
aws --region eu-west-1 ecr get-login-password | docker login --username AWS --password-stdin 123412341234.dkr.ecr.eu-west-1.amazonaws.com

# Push the image
docker push 123412341234.dkr.ecr.eu-west-1.amazonaws.com/lambda-container-demo:latest

Then either manually create the Lambda function or use the fresh from the oven CDK deployment.