Openshift is the RedHat public (and enterprise) PaaS solution.
Like Heroku, it works by running scripts triggered by git commits, so you can script
the launching of a Spring Boot application in pretty much any way you like as long as the
Java runtime is available (which is a standard feature you can ask for at Openshift).
To do this you can use the
DIY Cartridge and hooks in your
repository under .openshift/action_scripts:
The basic model is to:
pre_build hook
(Java and Maven are installed by default, Gradle is not)
Use a build hook to build your jar (using Maven or Gradle), e.g.
#!/bin/bash cd $OPENSHIFT_REPO_DIR mvn package -s .openshift/settings.xml -DskipTests=true
Add a start hook that calls java -jar …
#!/bin/bash
cd $OPENSHIFT_REPO_DIR
nohup java -jar target/*.jar --server.port=${OPENSHIFT_DIY_PORT} --server.address=${OPENSHIFT_DIY_IP} &
Use a stop hook (since the start is supposed to return cleanly), e.g.
#!/bin/bash
source $OPENSHIFT_CARTRIDGE_SDK_BASH
PID=$(ps -ef | grep java.*\.jar | grep -v grep | awk '{ print $2 }')
if [ -z "$PID" ]
then
client_result "Application is already stopped"
else
kill $PID
fi
Embed service bindings from environment variables provided by the platform
in your application.properties, e.g.
spring.datasource.url: jdbc:mysql://${OPENSHIFT_MYSQL_DB_HOST}:${OPENSHIFT_MYSQL_DB_PORT}/${OPENSHIFT_APP_NAME}
spring.datasource.username: ${OPENSHIFT_MYSQL_DB_USERNAME}
spring.datasource.password: ${OPENSHIFT_MYSQL_DB_PASSWORD}
There’s a blog on running Gradle in Openshift on their website that will get you started with a gradle build to run the app. A bug in Gradle currently prevents you from using Gradle newer than 1.6.