Spring Boot in Docker

Process

1. build jar file
2. build docker image
3. test image locally
4. login and push to https://hub.docker.com
5. make EC2 instance
6. install docker and start docker daemon
7. run docker image

• Dockerfile

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FROM openjdk:11-jre-slim-buster
ARG JAR_FILE=build/libs/*.jar
COPY ${JAR_FILE} app.jar
ENTRYPOINT ["java","-jar","/app.jar"]

Command

1. build jar file

• gradle build

2. build docker image

• docker build -t kenu/sb-demo
  • kenu: hub.docker.com account
  • sb-demo: image file name

3. test image locally

• docker run -p 8100:8080

4. login and push to https://hub.docker.com

• docker login
• docker push kenu/sb-demo

5. make EC2 instance
6. install docker and start docker daemon

• sudo dnf install docker -y
• sudo systemctl start docker
• sudo usermod -a -G docker ec2-user
• re login

7. run docker image

• docker run -p 8080:8080 kenu/sb-demo
• docker run -d -p 8080:8080 kenu/sb-demo

8. stop docker image

• docker ps
• docker stop `docker ps -q`

With Jenkins

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docker stop `docker ps -q`
docker rmi kenu/sb-demo -f
docker run -d -p 8080:8080 kenu/sb-demo

ref

• https://spring.io/guides/gs/spring-boot-docker/