docker-gitlab-spring-boot-boilerplate

Assumed that readers have preliminary knowledge of docker, docker-compose, gitlab, CI/CD and network.

• Network along with docker is very important.
• Should know how docker network works.
• It uses many container images from docker hub to achieve the goal that spring boot app can be deployed in docker container and be secured.
• Maybe a lot of things were skipped such as port-forwarding, setting ssh, etc..

Steps

First, install docker and docker-compose on your server

• Skipped.

Second, put docker-compose.yml from this repository on your preferred location.

• I used ~/docker-compose as the location.
• cd ~
• mkdir docker-compose
• cd docker-compose
• vim docker-compose.yml

Third, create docker network for explicitly internal usage.

• docker network create nginx-net

4th, Start docker containers along with predefined docker-compose.yml

• docker-compose up -d
• Or using zsh with docker-compose plugin, dco up -d

5th, Set up docker registry embedded in gitlab-ce container.

• Maybe already settled in docker-compose.yml

6th, register gitlab-runner for gitlab-CI

• docker exec -it gitlab-runner bash
• Execute gitlab-runner register and complete following prompts.
• Press Ctrl + p + q in order to exit from container shell safely.

7th, Develop spring-boot app and set up gitlab-CI

• Put Dockerfile and .gitlab-ci.yml on the root directory of spring boot project.

Finally, gitlab-CI may be triggered on push to the repository.