Example stateful application on kubernetes: my-stateful-app

my-stateful-app.yaml

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: my-stateful-app-pvc
  labels:
    app: my-stateful-app
spec:
  accessModes:
  - ReadWriteOnce
  resources:
    requests:
      storage: 1Gi

---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: my-stateful-app
  labels:
    app: my-stateful-app
spec:
  replicas: 1
  strategy:
    type: RollingUpdate
  selector:
    matchLabels:
      app: my-stateful-app
  template:
    metadata:
      labels:
        app: my-stateful-app
    spec:
      containers:
      - name: my-stateful-app
        image: busybox
        command: [ "/bin/sh", "-c", "--" ]
        args: [ 'touch /data/file1.txt; while true; do echo "Hellu"; sleep 2; done;' ]
        resources:
          requests:
            memory: 100Mi
          limits:
            memory: 100Mi
        env:
        - name: DUMMY
          value: '1'
        volumeMounts:
        - name: my-stateful-app-vol
          mountPath: /data
      volumes:
      - name: my-stateful-app-vol
        persistentVolumeClaim:
          claimName: my-stateful-app-pvc