Add persistent volume in Kubernetes StatefulSet on Minikube

If you use volumeClaimTemplates in StatefulSet k8s will do dynamic provisioning & create one PVC and corresponding PV for each pod, so each one of them gets their own storage.

What you want is to create one PV & one PVC and use it in all replicas of Statefulset.

Below is example on Kubernetes 1.10 how you can do it, where /var/www/html will be shared by all three Pods, just change /directory/on/host to some local directory on your machine. Also I ran this example on minikube v0.26.0

Ofcourse below is just an example to illustrate the idea, but in a real example processes in Pod should be aware of syncronizing access to shared storage.

kind: StorageClassapiVersion: storage.k8s.io/v1metadata:  name: local-storageprovisioner: kubernetes.io/no-provisionervolumeBindingMode: WaitForFirstConsumer---apiVersion: v1kind: PersistentVolumemetadata:  name: example-pvspec:  capacity:    storage: 100Gi  # volumeMode field requires BlockVolume Alpha feature gate to be enabled.  volumeMode: Filesystem  accessModes:    - ReadWriteOnce  persistentVolumeReclaimPolicy: Delete  storageClassName: local-storage  local:    path: /directory/on/host  nodeAffinity:    required:      nodeSelectorTerms:        - matchExpressions:            - key: kubernetes.io/hostname              operator: In              values:                - minikube ---kind: PersistentVolumeClaimapiVersion: v1metadata:  name: example-local-claimspec:  accessModes:    - ReadWriteOnce  resources:    requests:      storage: 5Gi  storageClassName: local-storage---apiVersion: "apps/v1beta1"kind: StatefulSetmetadata:  name: nginxspec:  serviceName: nginx  replicas: 3  template:    metadata:      labels:        app: nginx    spec:      containers:        - name: nginx-container           image: "nginx:1.12.2"          imagePullPolicy: "IfNotPresent"          volumeMounts:             - name: localvolume              mountPath: /var/www/html      volumes:        - name: localvolume          persistentVolumeClaim:            claimName: example-local-claim