lincolnDalgado.com

Step-by-Step Guide to Deploy Java Applications to Redhat Openshift(Kubernetes)

1. Register for a RedHat Developer Sandbox

https://developers.redhat.com/developer-sandbox

2. Login to your RedHat Developer Sandbox

https://developers.redhat.com/developer-sandbox/get-started

3. Install "oc" command line utility (RedHat's version of kubectl)

Instructions are here

4. Test "oc" command line utility

oc status

5. Copy the "oc login" command from the UI and run it on the console

6. Clone The Simple Java Application from GitHub

git clone git@github.com:dalgado-aws/first-openshift-java.git

7. Change into Application Directory

cd first-openshift-java

8. Create an "Image Stream" to refer to your Images

oc create is my-java-image-stream

9. Create a "Build Config" to convert your Java Source Code to an Image

oc apply -f manifests/oc_1_bc.yaml

10. Start the Build to create an Image

oc start-build build-my-java --from-dir=. --follow

11. Deploy the Image

export OPENSHIFT_NAMESPACE=$(oc config view --minify -o 'jsonpath={..namespace}') oc process -f manifests/oc_2_dc.yaml -p OPENSHIFT_NAMESPACE=$OPENSHIFT_NAMESPACE |oc create -f -

12. Create the Service to access the application from within Openshift

oc apply -f manifests/oc_3_service.yaml

13. Create the Route to access the application from the Internet

oc process -f manifests/oc_4_route.yaml -p OPENSHIFT_NAMESPACE=$OPENSHIFT_NAMESPACE |oc create -f -

14. Access the Application