Chapter 8. Running a SpringBoot business application on Red Hat OpenShift Container Platform

Procedure

1. Outside the business application project directories, create an ocp-image directory with the following subdirectories:

   ocp-image
   |--/root
     |--/opt
       |-- /spring-service

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2. Copy the single JAR file for your business application into the root/opt/spring-service subdirectory. For example:

   cd ../business-application-service
   cp target/business-application-service-1.0-SNAPSHOT.jar ../ocp-image/root/opt/spring-service/

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3. In the ocp-image directory, create a Dockerfile file with the following content:

   FROM registry.access.redhat.com/ubi8/openjdk-11:latest
   COPY root /
   EXPOSE 8090
   WORKDIR /opt/spring-service/
   CMD ["sh","-c", "java ${JAVA_OPTIONS} -Dorg.kie.server.mode=PRODUCTION -jar /opt/spring-service/<FILENAME>.jar"]

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   Replace <FILENAME>.jar with the name of the single JAR file for your business application.

4. To build the initial image and deploy it in your Red Hat OpenShift Container Platform environment, complete the following steps:

   1. To build the image, run the following commands in the ocp-image directory:

      oc new-build --binary --strategy=docker --name openshift-kie-springboot
      oc start-build openshift-kie-springboot --from-dir=. --follow

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      Optional: replace openshift-kie-springboot with a custom application name in these commands and all subsequent commands.

   2. To deploy the image in the Red Hat OpenShift Container Platform environment, run the following command:

      oc new-app openshift-kie-springboot

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   3. Optional: To expose the route for the image, run the following command:

      oc expose service/openshift-kie-springboot --port=8090

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5. If you already built and deployed the image and need to update it, for example if you built the JAR file for a new version of Red Hat Decision Manager or of Spring Boot, run the following command in the ocp-image directory:

   oc start-build openshift-kie-springboot --from-dir=. --follow

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