Spring Boot Application as Docker Container Image on AWS EC2
Posted On January 4, 2023 | By Antony Basco 3 Min Read
When we dive in to microservice architecture, we search for many ways to deploy it. Docker tool helps us to deploy multiple microservices / applications as containers. Let’s deep dive in to setting up docker service in AWS EC2 and deploy simple or complex spring boot applications. Assuming that you already have a java application written in spring boot framework, let’s see how to build it as a docker image and deploy as a microservice. We can choose either jar or war packaging to deploy in to docker service, which really doesn’t make any big difference.
Let it be simple straight forward application or a complex algorithm one, just follow the below steps,
1.Create a new file in any IDE with type as File and name it as Docker
3.Just paste the below contents in the Docker file (change application name with your project name)
FROM openjdk:17-jdk-slim
ARG JAR_FILE=./amizhthblog.jar
COPY ${JAR_FILE} amizhthblog.jar
ENTRYPOINT [“java”,”-jar”,” amizhthblog.jar”]
Line 1: JDK to be used
Line 2: The path where the jar is located.
Line 3: Copying the jar file from path in to the container
Line 4: Telling docker what to look for.
4. Build your spring boot application using maven. The docker file is not necessarily to be present inside the application package.
Installing Docker Service in AWS EC2
1.Install Docker
sudo yum install docker
1.Give ec2-user full access over docker service
sudo usermod -a -G docker ec2-user
id ec2-user
newgrp docker
3. Enabling docker service with systemctl which will start the docker service if the server reboot happens
sudo systemctl enable docker.service
4. Start docker service
sudo systemctl start docker.service
5. Check status
sudo systemctl status docker.service
Deploy spring boot container image
1.place your application jar / war file and Docker file under /home/ec2-user/docker (the location can be anything that you wish)
2.run the command
docker build -t amizhthblog .
3.bind the container to respective port and run the service, here we are binding to port 80
docker run -d -e SERVER_PORT=80 -p 80:80 amizhthblog.
4.To check the logs, follow the steps below
a. Run the command
docker ps -a
b. copy the container id which will be like 93053c4902b
c. Run the command
docker logs -f 93053c4902b0
