deploy statefulset on kubernetes with local pv: 2 node(s) had volume node affinity conflict

Background: kubernets cluster: 1.18 3 nodes:

• host_master
• host_node1
• host_node2

master with taint: node-role.kubernetes.io/master:Noschedule

My case:

create dir on node1: /data/oss0; /data/oss1; create dir on node2: /data/oss2; /data/oss3;

create pv/pvc with local volume

# define local pv/pvc
apiVersion: v1
kind: PersistentVolume
metadata:
  name: local-oss-0
  labels:
    pvname: local-oss-0
spec:
  capacity:
    storage: 50Gi
  volumeMode: Filesystem
  accessModes:
    - ReadWriteOnce
  persistentVolumeReclaimPolicy: Retain
  storageClassName: local-oss
  local:
    path: /data/oss0
  nodeAffinity:
    required:
      nodeSelectorTerms:
        - matchExpressions:
            - key: kubernetes.io/hostname
              operator: In
              values:
                - host_node1
---
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: local-oss-minio-test-0
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 50Gi
  storageClassName: local-oss
  selector:
    matchLabels:
      pvname: local-oss-0
---
apiVersion: v1
kind: PersistentVolume
metadata:
  name: local-oss-1
  labels:
    pvname: local-oss-1
spec:
  capacity:
    storage: 50Gi
  volumeMode: Filesystem
  accessModes:
    - ReadWriteOnce
  persistentVolumeReclaimPolicy: Retain
  storageClassName: local-oss
  local:
    path: /data/oss1
  nodeAffinity:
    required:
      nodeSelectorTerms:
        - matchExpressions:
            - key: kubernetes.io/hostname
              operator: In
              values:
                - host_node1
---
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: local-oss-minio-test-1
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 50Gi
  storageClassName: local-oss
  selector:
    matchLabels:
      pvname: local-oss-1
---
apiVersion: v1
kind: PersistentVolume
metadata:
  name: local-oss-2
  labels:
    pvname: local-oss-2
spec:
  capacity:
    storage: 50Gi
  volumeMode: Filesystem
  accessModes:
    - ReadWriteOnce
  persistentVolumeReclaimPolicy: Retain
  storageClassName: local-oss
  local:
    path: /data/oss2
  nodeAffinity:
    required:
      nodeSelectorTerms:
        - matchExpressions:
            - key: kubernetes.io/hostname
              operator: In
              values:
                - host_node2
---
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: local-oss-minio-test-2
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 50Gi
  storageClassName: local-oss
  selector:
    matchLabels:
      pvname: local-oss-2
---
apiVersion: v1
kind: PersistentVolume
metadata:
  name: local-oss-3
  labels:
    pvname: local-oss-3
spec:
  capacity:
    storage: 50Gi
  volumeMode: Filesystem
  accessModes:
    - ReadWriteOnce
  persistentVolumeReclaimPolicy: Retain
  storageClassName: local-oss
  local:
    path: /data/oss3
  nodeAffinity:
    required:
      nodeSelectorTerms:
        - matchExpressions:
            - key: kubernetes.io/hostname
              operator: In
              values:
                - host_node2
---
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: local-oss-minio-test-3
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 50Gi
  storageClassName: local-oss
  selector:
    matchLabels:
      pvname: local-oss-3

As U see, create 4 pvcs, that's name match the statefulSet dynamic pvc, pvcname-{container-name}-{ordinal}

when apply a statefulSet with 4 replicates got error: Warning FailedScheduling 82s (x7 over 8m37s) default-scheduler 0/3 nodes are available: 1 node(s) had taint {node-role.kubernetes.io/master: }, that the pod didn't tolerate, 2 node(s) had volume node affinity conflict.

Some body can help me know, why?

2 nodes can not carry 4 replicates StatefulSet? or just local pvc cannot use it as that?

I found the problem: nodeAffinity config conflict. The hostname in linux with a capital letter , but in Kubernetes is lowercase.