Explore ways to run Serverless application on AWS Lambda with Java 21 based Docker Container Image

Architecture

Project Description

The code example include storing and retrieving product from the Amazon DynamoDB. I put Amazon API Gateway in front of my Lambdas.

Installation and deployment

Install Java Coretto 21 (https://docs.aws.amazon.com/corretto/latest/corretto-21-ug/amazon-linux-install.html

sudo yum install java-21-amazon-corretto

Install Maven

sudo yum install -y maven

or ..

wget https://mirrors.estointernet.in/apache/maven/maven-3/3.8.5/binaries/apache-maven-3.8.5-bin.tar.gz
tar -xvf apache-maven-3.8.5-bin.tar.gz
sudo mv apache-maven-3.8.5 /opt/

M2_HOME='/opt/apache-maven-3.8.5'
PATH="$M2_HOME/bin:$PATH"
export PATH

Clone git repository locally
git clone https://github.com/Vadym79/AWSLambdaJavaDockerImage.git

1) For aws-pure-lambda-java21-docker-image project with public.ecr.aws/lambda/java:21 base image  

Compile and package the Java application with Maven from the root (where pom.xml is located) of the project
mvn compile dependency:copy-dependencies -DincludeScope=runtime

docker build --no-cache -t aws-pure-lambda-java21-custom-docker-image:v1 .
docker save aws-pure-lambda-java21-custom-docker-image > aws-pure-lambda-java21-custom-docker-image

aws ecr get-login-password --region eu-central-1 | docker login --username AWS --password-stdin {aws_account_id}.dkr.ecr.eu-central-1.amazonaws.com  

aws ecr create-repository --repository-name aws-pure-lambda-java21-custom-docker-image --image-scanning-configuration scanOnPush=true --region eu-central-1  

docker tag aws-pure-lambda-java21-custom-docker-image:v1 {aws_account_id}.dkr.ecr.eu-central-1.amazonaws.com/aws-pure-lambda-java21-custom-docker-image:v1

docker push {aws_account_id}.dkr.ecr.eu-central-1.amazonaws.com/aws-pure-lambda-java21-custom-docker-image:v1 
2) For aws-pure-lambda-java21-docker-image-alpine-linux project with amazoncorretto:21-alpine base image  

Project don't need to be compiled (happens during Docker build)

docker build --no-cache -t aws-pure-lambda-java21-custom-docker-image-alpine:v1 .
docker save aws-pure-lambda-java21-custom-docker-image-alpine > aws-pure-lambda-java21-custom-docker-image-alpine

aws ecr get-login-password --region eu-central-1 | docker login --username AWS --password-stdin {aws_account_id}.dkr.ecr.eu-central-1.amazonaws.com  

aws ecr create-repository --repository-name aws-pure-lambda-java21-custom-docker-image-alpine --image-scanning-configuration scanOnPush=true --region eu-central-1  

docker tag aws-pure-lambda-java21-custom-docker-image-alpine:v1 {aws_account_id}.dkr.ecr.eu-central-1.amazonaws.com/aws-pure-lambda-java21-custom-docker-image-alpine:v1

docker push {aws_account_id}.dkr.ecr.eu-central-1.amazonaws.com/aws-pure-lambda-java21-custom-docker-image-alpine:v1 

3) For aws-spring-boot-3.2-java21-custom-docker-image project with public.ecr.aws/lambda/java:21 base image  

mvn compile dependency:copy-dependencies -DincludeScope=runtime
docker build --no-cache -t aws-spring-boot-3.2-java21-custom-docker-image:v1 .

aws ecr create-repository --repository-name aws-spring-boot-3.2-java21-custom-docker-image --image-scanning-configuration scanOnPush=true --region eu-central-1  

docker tag aws-spring-boot-3.2-java21-custom-docker-image:v1 {aws_account_id}.dkr.ecr.eu-central-1.amazonaws.com/aws-spring-boot-3.2-java21-custom-docker-image:v1

docker push {aws_account_id}.dkr.ecr.eu-central-1.amazonaws.com/aws-spring-boot-3.2-java21-custom-docker-image:v1 


Deploy your application with AWS SAM
sam deploy -g  

Further Readings

You can read my article series "AWS Lambda SnapStart" on https://dev.to/vkazulkin/measuring-java-11-lambda-cold-starts-with-snapstart-part-1-first-impressions-30a4