Prerequisite

Before we can start building the application, we need to have an OpenShift free account and client tools installed.

Step 1: Create DIY application

To create an application using client tools, type the following command:

rhc app create backend diy-0.1

This command creates an application backend using DIY cartridge and clones the repository to backend directory.

Step 2: Add MYSQL cartridge to application

The application we are creating will use MYSQL database, hence we need to add appropriate cartridge to the application:

rhc cartridge add mysql-5.5 -a backend

After creating the cartridge, it is possible to check its status with the following command:

rhc cartridge status mysql-5.5 --app backend

Step 3: Delete Template Application Source code

OpenShift creates a template project that can be freely removed:

git rm -rf .openshift README.md diy misc

Commit the changes:

git commit -am "Removed template application source code"

Step 4: Pull Source code from GitHub or Local machine repository

git remote add upstream https://github.com/Java-SpringBoot/openshift-springboot-mysql-diy.git
git pull -s recursive -X theirs upstream master --allow-unrelated-histories

Optional :Local machine repository

git clone <git_url> <directory to create>
git add .
git commit -m "A checkin to my application"
git update-index --chmod=+x .openshift/action_hooks/deploy
git commit -m "A checkin to my application"

Step 5: Push changes

The basic template is ready to be pushed:

git push

The initial deployment (build and application startup) will take some time (up to several minutes). Subsequent deployments are a bit faster, although starting Spring Boot application may take even more than 2 minutes on small Gear:

Tomcat started on port(s): 8080/http
Started Application in 125.511 seconds

You can now browse to: http://backend-.rhcloud.com/manage/health and you should see:

{
	"status": "UP",
	"database": "MYSQL",
	"hello": 1
}

You can then browse to "/" to see the API root resource.