How to debug java apps on Openshift/Kubernetes
Envirorment variable/Config Maps
Add these evironmment variables to config maps in deployment template.
JAVA_DEBUG: trueJAVA_DEBUG_PORT: 9009
NOTE
If the JAVA_DEBUG variable is set to true and no value is provided for the JAVA_DEBUG_PORT variable, JAVA_DEBUG_PORT is set to 5005 by default.
Connect Local Debugging Port to a Port on the Pod
Get the name of the pod running the application.
oc get pods
Use the OpenShift / Kubernetes port forwarding feature to listen on a local port and forward to a port on the OpenShift pod.
oc port-forward <name-of-pod> 5005:9009
Intellij Remote debugging
Open the same code base.
Run > Edit Configuration > Add New Configuration > select “Remote” from the list.
give any sutiable name to the config
HOST: localhostPort: 5005
Run the config.
You can now set break pointings on the code and debug application.