---
apiVersion: apps/v1
kind: StatefulSet
metadata:
    labels: {app: my-app}
    name: my-app
    namespace: my-namespace
spec:
    selector: {matchLabels: {app: my-app}}
    replicas: 3
    serviceName: my-app
    template:
        metadata: {labels: {app: my-app}}
        spec:
            containers:
              - name: my-app
                image: nginx
                volumeMounts:
                  - {name: my-app-data, mountPath: "/usr/share/nginx/html"}
    volumeClaimTemplates:
      - metadata: {name: my-app-data}
        spec:
            selector: {matchLabels: {app: my-app}}
            resources: {requests: {storage: 1Gi}}
            accessModes: [ReadWriteOnce]