Hi I am playing around with Kubernetes secrets. My deployment file is :

---
apiVersion: v1
kind: Secret
metadata:
  name: my-secrets
  labels:
    app: my-app
data:
  username: dXNlcm5hbWU=
  password: cGFzc3dvcmQ=

I am able to create secrets and I am mounting them in my deployments as below:

---
apiVersion: v1
kind: Service
metadata:
  name: my-service
spec:
  selector:
    app: my-service
  ports:
  - protocol: TCP
    port: 80
    targetPort: 8080
  type: NodePort

---

apiVersion: apps/v1
kind: Deployment
metadata:
  name: spring-service
  labels:
    app: spring-service
spec:
  replicas: 1
  selector:
    matchLabels:
      app: spring-service
  template:
    metadata:
      labels:
        app: spring-service
    spec:
      containers:
      - name: spring-service
        image: my-image:tag
        imagePullPolicy: Always
        ports:
        - containerPort: 8080
        volumeMounts:
        - name: my-secret-vol
          mountPath: "/app/secrets/my-secret"
          readOnly: true            
      volumes:
      - name: my-secret-vol
        secret:
          secretName: my-secrets

My question is how can I access username and password I created in secret in spring-boot app?

I have tried loading in with ${my-secrets.username} and ${username}, but it fails to find values.

I also tried adding secrets as enviroment variables as below in deployment.yml:

env:
- name: username
  valueFrom:
    secretKeyRef:
      name: my-secrets
      key: username
- name: password
  valueFrom:
    secretKeyRef:
      name: my-secrets
      key: password

In this case, values are loaded from secrets and when I change values of secrets in minikube dashboard, it does not reflect the changes.

Please help me to understand how this works.

I am using minikube and docker as containers