Multiple Volume mounts with Kubernetes: one works, one doesn't

The Kubernetes documentation states:

Volumes can not mount onto other volumes or have hard links to other volumes

I had the same issue and in my case the problem was that both volume mounts had overlapping mountPaths, i.e. both started with /var/.

They mounted without issues after fixing that.

I do not see any direct problem for which such behavior as explained above has occurred! But what I can rather ask you to try is to use a "Deployment" instead of a "Pod" as suggested by many here, especially when using PVs and PVCs. Deployment takes care of many things to maintain the "Desired State". I have attached my code below for your reference which works and both the volumes are persistent even after deleting/terminating/restarting as this is managed by the Deployment's desired state.

Two difference which you would find in my code from yours are:

1. I have a deployment object instead of pod
2. I am using GlusterFs for my volume.

Deployment yml.

apiVersion: extensions/v1beta1kind: Deploymentmetadata:  name: nginx  namespace: platform  labels:    component: nginxspec:  replicas: 2  strategy:    type: RollingUpdate    rollingUpdate:      maxSurge: 1      maxUnavailable: 1  template:    metadata:      labels:        component: nginx    spec:      nodeSelector:        role: app-1      containers:        - name: nginx          image: vip-intOAM:5001/nginx:1.15.3          imagePullPolicy: IfNotPresent          volumeMounts:          - mountPath: "/etc/nginx/conf.d/"            name: nginx-confd          - mountPath: "/var/www/"            name: nginx-web-content      volumes:      - name: nginx-confd        persistentVolumeClaim:          claimName: glusterfsvol-nginx-confd-pvc      - name: nginx-web-content        persistentVolumeClaim:          claimName: glusterfsvol-nginx-web-content-pvc

One of my PV

apiVersion: v1kind: PersistentVolumemetadata:  name: glusterfsvol-nginx-confd-pvspec:  capacity:    storage: 1Gi  accessModes:    - ReadWriteOnce  glusterfs:    endpoints: gluster-cluster    path: nginx-confd    readOnly: false  persistentVolumeReclaimPolicy: Retain  claimRef:    name: glusterfsvol-nginx-confd-pvc    namespace: platform

PVC for the above

kind: PersistentVolumeClaimapiVersion: v1metadata:  name: glusterfsvol-nginx-confd-pvc  namespace: platformspec:  accessModes:    - ReadWriteOnce  resources:    requests:      storage: 1Gi