So i am struggling to read a xml file from kubernetes. I am running an open liberty server and a maven packaged war application. what do i need to change from my Java code so i can read file from kubernetes.

The issue here is that the code reads pdp.xml from the resources folder inside the war file, not externally in a kubernetes volume.

My configMap looks like this

kind: ConfigMap
apiVersion: v1
metadata:
  name: testing-config
data:
  pdp.xml: |
   <pdp    xmlns="http://authzforce.github.io/core/xmlns/pdp/7"
           xmlns:att="za.co.some.data"
           xmlns:xacml="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17"
           version="7.1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
   </pdp>

Here's the yaml file with volumes

apiVersion: apps/v1
kind: Deployment
metadata:
  name: testing-app
  labels:
    app: testing-app
spec:
  replicas: 1
  selector:
    matchLabels:
      app: testing-app
  template:
    metadata:
      labels:
        app: testing-app
    spec:
      containers:
      - name: testing-app
        image: testing-app:1.0.24-SNAPSHOT
        imagePullPolicy: Always
        volumeMounts:
        - name: testing-app-volume
          mountPath: /config/pdp.xml
          subPath: pdp.xml
          readOnly: true
      volumes:
      - name: testing-app-volume
        configMap:
          name: testing-app-config
      restartPolicy: Always

I don't really know Java that well but here's how i'm reading the file.

Resource resource = new ClassPathResource("pdp.xml");
InputStream cfgFile = null;
byte[] buffer = null;
try {
  cfgFile = resource.getInputStream();
  buffer = new byte[cfgFile.available()];
} catch (IOException e) {
  log.error(ERROR_MESSAGE);
  throw new IllegalStateException(ERROR_MESSAGE);
}

this is the folder structure inside the container