Docker Compose Made Easy: Spring Boot Banking App in No Time!

Prerequisite:

• It is recommended to read this blog before proceeding with the current one: Banking App and then Docker Image Push Publicly .

• I have added this project on my: GitHub Repo you can fork this project.

Steps to Dockerize a Spring Boot Banking App:

1. Create a docker-compose.yml file

version: "3.8"

services:
  mysql:
    container_name: mysql
    image: mysql:latest
    ports:
      - 3306:3306
    environment:
      MYSQL_ROOT_PASSWORD: Test@123
      MYSQL_DATABASE: BankDB
    networks:
      - bankapp
    volumes:
      - mysql-data:/var/lib/mysql
    healthcheck:
      test: ["CMD","mysqladmin","ping","-h","localhost","-uroot","-pTest@123"]
      interval: 10s
      timeout: 5s
      retries: 5
      start_period: 60s
    restart: always

  bankapp:
    container_name: bankapp
    image: chetan0103/springboot-bankapp:latest
    ports:
      - 8080:8080
    environment:
      SPRING_DATASOURCE_USERNAME: root
      SPRING_DATASOURCE_URL: "jdbc:mysql://mysql:3306/BankDB?useSSL=false&allowPublicKeyRetrieval=true&serverTimezone=UTC"
      SPRING_DATASOURCE_PASSWORD: Test@123
    networks:
      - bankapp
    depends_on:
      - mysql
    restart: always

volumes:
  mysql-data:

networks:
  bankapp:

(This concept involves deleting all the images.)

#To list all the images
docker images -aq 

#Forcefully delete all the image id's
docker rmi -f $(docker images -aq)
#List images and you can see no images
docker images

2. To install Docker Compose on your virtual machine, follow these steps:

sudo apt-get install docker-compose-v2

3. Now, execute Docker Compose to run the application, and the image of the Spring Boot app will be pulled from Docker Hub.

docker compose up -d
#-d is use our docker compose to run in the background

4. You can now copy the public IP from your EC2 instance and paste it into your browser, using port 8080. This will allow you to see your application running.

Register a new user, and then you can access all the features.

Even if we stop our container, our data will remain saved because we have added a volume in our configuration.

5. Now, we can access MySQL to check if our data is stored in the volume.

docker exec -it "container_id" bash

#Run docker ps to get container id for particular container

• To log in to MySQL, follow these steps:

mysql -u root -p

#It will ask password (Password which you use to create MySQL-> Test@123)

• To perform tasks within the MySQL container, follow these steps:

use BankDB;

show tables;

select * from account;

select * from transaction;

This guide explains how to Dockerize a Spring Boot Banking App using Docker Compose in a few simple steps.

Happy Learning :)

Chetan Mohod

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