Deploying a Spring Boot application to AWS Fargate

Deploying a Spring Boot application to AWS Fargate involves the following steps:

1. Prerequisites

  • AWS Account: Ensure you have an active AWS account.
  • Docker Installed: Your Spring Boot application should be containerized using Docker.
  • AWS CLI: Install and configure the AWS CLI with the required permissions.
  • ECS CLI or AWS Management Console: To deploy and manage your services on ECS.


2. Prepare Your Spring Boot Application

1. Build the JAR: Use Maven or Gradle to build the application:

./mvnw package

The JAR file will be in the target/ directory.


2. Create a Dockerfile: Create a Dockerfile in your project's root:

FROM openjdk:17-jdk-slim
ARG JAR_FILE=target/my-app.jar
COPY ${JAR_FILE} app.jar
ENTRYPOINT ["java", "-jar", "/app.jar"]


3. Build and Test Docker Image:

docker build -t my-spring-boot-app .
docker run -p 8080:8080 my-spring-boot-app

Verify the application is running on localhost:8080.


3. Push Docker Image to AWS ECR

1. Create an ECR Repository:

aws ecr create-repository --repository-name my-spring-boot-app


2. Authenticate Docker to AWS ECR:

aws ecr get-login-password --region <region> | docker login --username AWS --password-stdin <account_id>.dkr.ecr.<region>.amazonaws.com


3. Tag and Push the Image:

docker tag my-spring-boot-app:latest <account_id>.dkr.ecr.<region>.amazonaws.com/my-spring-boot-app:latest
docker push <account_id>.dkr.ecr.<region>.amazonaws.com/my-spring-boot-app:latest


4. Configure AWS Fargate

1. Create a Task Definition:

  • Use the AWS Management Console or AWS CLI to define your task.
  • Specify:

           1. Task family name.

           2. Container details (e.g., ECR image URL, memory, and CPU requirements).

           3. Networking configurations.


2. Set Up ECS Cluster:

aws ecs create-cluster --cluster-name my-spring-boot-cluster


3. Deploy the Service:

  • Create a service in your ECS cluster using the task definition.
  • Specify Fargate as the launch type.

5. Configure Networking and Load Balancer

1. VPC and Subnets: Ensure your cluster runs in a VPC with proper subnets (public/private based on use case).

2. Create an Application Load Balancer:

  • Attach to your ECS service.
  • Configure health checks and listener rules.

6. Deploy and Verify

  • Once deployed, ECS will pull your Docker image from ECR and run it on Fargate.
  • Access the application via the Load Balancer's DNS.


7. Automate with CI/CD (Optional)

Use AWS CodePipeline or a third-party CI/CD tool to automate build, test, and deployment steps. 

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