Wordpress in Kubernetes K3s on Raspberry Pi

mariadb.yml

# This manifest assumes 'wordpress' namespace is already present:
#
#   kubectl create namespace wordpress
#
# Apply the manifest with:
#
#   kubectl apply -f mariadb.yml
---
apiVersion: v1
kind: Secret
metadata:
  name: mariadb-pass
  namespace: wordpress
  labels:
    app: wordpress
data:
  # This value is base64-encoded. Do not use this password in production!
  password: MjJzaXl3dVpBNFdmeHNZcg==

---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: mariadb-pv-claim
  namespace: wordpress
  labels:
    app: wordpress
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 1Gi

---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: wordpress-mariadb
  namespace: wordpress
  labels:
    app: wordpress
spec:
  selector:
    matchLabels:
      app: wordpress
      tier: mariadb
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        app: wordpress
        tier: mariadb
    spec:
      containers:
        - image: tobi312/rpi-mariadb:10.3
          name: mariadb
          env:
            - name: MYSQL_ROOT_PASSWORD
              valueFrom:
                secretKeyRef:
                  name: mariadb-pass
                  key: password
          ports:
            - containerPort: 3306
              name: mariadb
          volumeMounts:
            - name: mariadb-persistent-storage
              mountPath: /var/lib/mysql
          resources:
            limits:
              cpu: '1'
              memory: '512Mi'
            requests:
              cpu: '500m'
              memory: '256Mi'
      volumes:
        - name: mariadb-persistent-storage
          persistentVolumeClaim:
            claimName: mariadb-pv-claim

---
apiVersion: v1
kind: Service
metadata:
  name: wordpress-mariadb
  namespace: wordpress
  labels:
    app: wordpress
spec:
  ports:
    - port: 3306
  selector:
    app: wordpress
    tier: mariadb
  clusterIP: None

wordpress.yml

# This manifest assumes 'wordpress' namespace is already present:
#
#   kubectl create namespace wordpress
#
# Apply the manifest with:
#
#   kubectl apply -f wordpress.yml
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: wp-pv-claim
  namespace: wordpress
  labels:
    app: wordpress
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 1Gi

---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: wordpress
  namespace: wordpress
  labels:
    app: wordpress
spec:
  selector:
    matchLabels:
      app: wordpress
      tier: frontend
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        app: wordpress
        tier: frontend
    spec:
      containers:
        - image: wordpress:5.4-apache
          name: wordpress
          env:
            - name: WORDPRESS_DB_HOST
              value: wordpress-mariadb
            - name: WORDPRESS_DB_PASSWORD
              valueFrom:
                secretKeyRef:
                  name: mariadb-pass
                  key: password
          ports:
            - containerPort: 80
              name: wordpress
          volumeMounts:
            - name: wordpress-persistent-storage
              mountPath: /var/www/html
          resources:
            limits:
              cpu: '1'
              memory: '512Mi'
            requests:
              cpu: '500m'
              memory: '256Mi'
      volumes:
        - name: wordpress-persistent-storage
          persistentVolumeClaim:
            claimName: wp-pv-claim

---
apiVersion: v1
kind: Service
metadata:
  name: wordpress
  namespace: wordpress
  labels:
    app: wordpress
spec:
  ports:
    - port: 80
  selector:
    app: wordpress
    tier: frontend
  type: NodePort

---
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: wordpress
  namespace: wordpress
spec:
  rules:
    - host: wordpress.10.0.100.99.nip.io
      http:
        paths:
          - path: /
            backend:
              serviceName: wordpress
              servicePort: 80

i have this error and im not able to access the setup page im new to this and need help

error: resource mapping not found for name: "wordpress" namespace: "wordpress" from "matt-blog/wordpress.yml": no matches for kind "Ingress" in version "extensions/v1beta1"
ensure CRDs are installed first