Os erros no banco de dados não sumiram

Boa noite, eu fiz o último passo a passo do capítulo 4, mas ao rodar a aplicação os erros no banco permaneceram, não sei se eu errei algo nos arquivos.

Warning: mysqli_connect(): Server sent charset (255) unknown to the client. Please, report to the developers in /var/www/html/conecta.php on line 4

Warning: mysqli_connect(): (HY000/2054): Server sent charset unknown to the client. Please, report to the developers in /var/www/html/conecta.php on line 4

Warning: mysqli_query() expects parameter 1 to be mysqli, boolean given in /var/www/html/banco-categoria.php on line 7

Warning: mysqli_fetch_assoc() expects parameter 1 to be mysqli_result, null given in /var/www/html/banco-categoria.php on line 8

pod-banco.yaml:

apiVersion: v1
kind: Pod
metadata:
  name: mysql
spec:
  containers:
    - name: container-mysql
      image: mysql
      ports:
        - containerPort: 3306
      env:
        - name: MYSQL_DATABASE
          value: "loja"
        - name: MYSQL_USER
          value: "root"
        - name: MYSQL_ALLOW_EMPTY_PASSWORD
          value: "1"

statefulset.yaml:

apiVersion: apps/v1beta1
kind: StatefulSet
metadata:
  name: statefulset-mysql
spec:
  serviceName: db
  template:
    metadata:
      labels:
       name: mysql
    spec:
      containers:
        - name: container-mysql
          image: mysql
          ports:
            - containerPort: 3306
          env:
            - name: MYSQL_DATABASE
              value: "loja"
            - name: MYSQL_USER
              value: "root"
            - name: MYSQL_ALLOW_EMPTY_PASSWORD
              value: "1"
          volumeMounts:
            - name: volume-mysql
              mountPath: /var/lib/mysql
      volumes:
       - name: volume-mysql
         persistentVolumeClaim:
           claimName: configuracao-mysql

servico-banco.yaml:

apiVersion: v1
kind: Service
metadata:
  name: db
spec:
  type: ClusterIP
  ports:
    - port: 3306
  selector:
    name: mysql

permissoes.yaml:

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: configuracao-mysql
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 3Gi

Obrigado.