How to run Dgraph on bare-metal Kubernetes cluster

I am trying to setup Dgraph in HA Cluster but it won't deploy if no volumes are present.

When directly applying the provided config on a bare-metal cluster won't work.

$ kubectl get pod --namespace dgraph
dgraph-alpha-0                      0/1     Pending     0          112s
dgraph-ratel-7459974489-ggnql       1/1     Running     0          112s
dgraph-zero-0                       0/1     Pending     0          112s


$ kubectl describe pod/dgraph-alpha-0 --namespace dgraph
Events:
  Type     Reason            Age        From               Message
  ----     ------            ----       ----               -------
  Warning  FailedScheduling  <unknown>  default-scheduler  error while running "VolumeBinding" filter plugin for pod "dgraph-alpha-0": pod has unbound immediate PersistentVolumeClaims
  Warning  FailedScheduling  <unknown>  default-scheduler  error while running "VolumeBinding" filter plugin for pod "dgraph-alpha-0": pod has unbound immediate PersistentVolumeClaims

Anyone else has this problem? I've been experiencing this issue for several days now and can not find a way around this. How can I have Dgraph use cluster's local storage?

Thanks

Found a working solution myself.

I have to manually create the pv and pvc, then Dgraph can use them during deployment.

Here is the config I used to create the needed storageclass, pv and pvc

---
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: local
  annotations:
    storageclass.kubernetes.io/is-default-class: "true"
provisioner: kubernetes.io/no-provisioner
reclaimPolicy: Delete
volumeBindingMode: WaitForFirstConsumer
---
apiVersion: v1
kind: PersistentVolume
metadata:
  name: datadir-dgraph-dgraph-alpha-0
  labels:
    type: local
spec:
  storageClassName: local
  capacity:
    storage: 8Gi
  accessModes:
    - ReadWriteOnce
  hostPath:
    path: "/mnt/dgraph/alpha-0"
---
apiVersion: v1
kind: PersistentVolume
metadata:
  name: datadir-dgraph-dgraph-alpha-1
  labels:
    type: local
spec:
  storageClassName: local
  capacity:
    storage: 8Gi
  accessModes:
    - ReadWriteOnce
  hostPath:
    path: "/mnt/dgraph/alpha-1"
---
apiVersion: v1
kind: PersistentVolume
metadata:
  name: datadir-dgraph-dgraph-alpha-2
  labels:
    type: local
spec:
  storageClassName: local
  capacity:
    storage: 8Gi
  accessModes:
    - ReadWriteOnce
  hostPath:
    path: "/mnt/dgraph/alpha-2"
---
apiVersion: v1
kind: PersistentVolume
metadata:
  name: datadir-dgraph-dgraph-zero-0
  labels:
    type: local
spec:
  storageClassName: local
  capacity:
    storage: 8Gi
  accessModes:
    - ReadWriteOnce
  hostPath:
    path: "/mnt/dgraph/zero-0"
---
apiVersion: v1
kind: PersistentVolume
metadata:
  name: datadir-dgraph-dgraph-zero-1
  labels:
    type: local
spec:
  storageClassName: local
  capacity:
    storage: 8Gi
  accessModes:
    - ReadWriteOnce
  hostPath:
    path: "/mnt/dgraph/zero-1"
---
apiVersion: v1
kind: PersistentVolume
metadata:
  name: datadir-dgraph-dgraph-zero-2
  labels:
    type: local
spec:
  storageClassName: local
  capacity:
    storage: 8Gi
  accessModes:
    - ReadWriteOnce
  hostPath:
    path: "/mnt/dgraph/zero-2"
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: datadir-dgraph-dgraph-alpha-0
spec:
  storageClassName: local
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 8Gi
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: datadir-dgraph-dgraph-alpha-1
spec:
  storageClassName: local
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 8Gi
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: datadir-dgraph-dgraph-alpha-2
spec:
  storageClassName: local
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 8Gi
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: datadir-dgraph-dgraph-zero-0
spec:
  storageClassName: local
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 8Gi
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: datadir-dgraph-dgraph-zero-1
spec:
  storageClassName: local
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 8Gi
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: datadir-dgraph-dgraph-zero-2
spec:
  storageClassName: local
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 8Gi

When Dgraph is deployed it latches at the pvc

$ kubectl get pvc -n dgraph -o wide
NAME                            STATUS   VOLUME                          CAPACITY   ACCESS MODES   STORAGECLASS   AGE     VOLUMEMODE
datadir-dgraph-dgraph-alpha-0   Bound    datadir-dgraph-dgraph-zero-2    8Gi        RWO            local          6h40m   Filesystem
datadir-dgraph-dgraph-alpha-1   Bound    datadir-dgraph-dgraph-alpha-0   8Gi        RWO            local          6h40m   Filesystem
datadir-dgraph-dgraph-alpha-2   Bound    datadir-dgraph-dgraph-zero-0    8Gi        RWO            local          6h40m   Filesystem
datadir-dgraph-dgraph-zero-0    Bound    datadir-dgraph-dgraph-alpha-1   8Gi        RWO            local          6h40m   Filesystem
datadir-dgraph-dgraph-zero-1    Bound    datadir-dgraph-dgraph-alpha-2   8Gi        RWO            local          6h40m   Filesystem
datadir-dgraph-dgraph-zero-2    Bound    datadir-dgraph-dgraph-zero-1    8Gi        RWO            local          6h40m   Filesystem