⚛️ 📄 🚀
Deploy Python Lambda functions with container images
You can deploy your Lambda function code as a container image. AWS provides the following resources to help you build a container image for your Python function:
- AWS base images for Lambda
- These base images are preloaded with a language runtime and other components that are required to run the image on Lambda. AWS provides a Dockerfile for each of the base images to help with building your container image.
- Open-source runtime interface clients
- If you use a community or private enterprise base image, add a runtime interface client to the base image to make it compatible with Lambda.
What’s In This Document
- Create Docker image container
- Create
app.pyas lambda handler - Build and push the image to ECR
- Create Lambda container image
- Test the lambda function
🚀 Create Docker image container
1. Create an image from an alternative base image
FROM python:3.8-buster
RUN apt-get update && \
apt-get install -y python3-pip && \
pip3 install awslambdaric
COPY app.py ./
ENTRYPOINT [ "/usr/local/bin/python", "-m", "awslambdaric" ]
CMD ["app.handler"]2. Create an image from AWS base image
FROM amazon/aws-lambda-python:3.8
COPY app.py ./
CMD ["app.handler"]🚀 Create app.py as lambda handler
import sys
def handler(event, context):
return 'Hello from AWS Lambda using Python' + sys.version + '!'🚀 Build and push the image to ECR
aws ecr get-login-password --region ap-southeast-1 | docker login --username AWS --password-stdin 111111111111.dkr.ecr.ap-southeast-1.amazonaws.com
docker build -t pythonlambda .
docker tag pythonlambda:latest 111111111111.dkr.ecr.ap-southeast-1.amazonaws.com/pythonlambda:latest
docker push 111111111111.dkr.ecr.ap-southeast-1.amazonaws.com/pythonlambda:latest🚀 Create Lambda container image
🚀 Test the lambda function
1. Invoke lambda function
- Start container
docker rm -f lambdaimagetest
docker run -d --name lambdaimagetest -it pythonlambda:latest bash
docker exec -it lambdaimagetest bash- Invoke lambda function
⚡ $ aws lambda invoke --function-name python-lambda-image --region ap-southeast-1 outfile
{
"StatusCode": 200,
"ExecutedVersion": $LATEST"
}
⚡ $ cat outfile
"Hello from AWS Lambda using Python3.8.5 (default, Aug 5 2020, 08:22:02) \n[GCC 8.3.0]!"2. Call lambda API from local container
- This should be performed from AWS image base
- Run container
⚡ $ docker run -d --name testapi -p 9000:8080 pythonlambda:latest- Call API
⚡ $ curl -XPOST "http://localhost:9000/2015-03-31/functions/function/invocations" -d '{}'
"Hello from AWS Lambda using Python3.8.6 (default, Dec 16 2020, 01:05:15) \n[GCC 7.3.1 20180712 (Red Hat 7.3.1-11)]!"- Deploy new image
- Invoke lambda function
⚡ $ aws lambda invoke --function-name python-lambda-image --region ap-southeast-1 outfile
{
"StatusCode": 200,
"ExecutedVersion": "$LATEST"
}
⚡ $ cat outfile
"Hello from AWS Lambda using Python3.8.6 (default, Dec 16 2020, 01:05:15) \n[GCC 7.3.1 20180712 (Red Hat 7.3.1-11)]!"Read More
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