Create MySQL database pod with preloaded data

mysql_pod.yml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: mysql-deployment
  labels:
    app: mysql
spec:
  replicas: 1
  selector:
    matchLabels:
      app: mysql
  template:
    metadata:
      labels:
        app: mysql
    spec:
      containers:
        - name: mysql
          image: mysql:5.7
          ports:
            - containerPort: 3306
          env:
            - name: MYSQL_ROOT_PASSWORD
              valueFrom:
                secretKeyRef:
                  name: mysql-secrets
                  key: ROOT_PASSWORD
          volumeMounts:
            - name: mysql-initdb
              mountPath: /docker-entrypoint-initdb.d
            - mountPath: "/var/lib/mysql"
              subPath: "mysql"
              name: mysql-data
      volumes:
        - name: mysql-initdb
          configMap:
            name: mysql-initdb-config
        - name: mysql-data
          persistentVolumeClaim:
            claimName: mysql-data-disk
---
apiVersion: v1
kind: ConfigMap
metadata:
  name: mysql-initdb-config
data:
  init.sql: |
    CREATE DATABASE IF NOT EXISTS mydata;
    USE mydata;
    CREATE TABLE friends (id INT, name VARCHAR(256), age INT, gender VARCHAR(3));
    INSERT INTO friends VALUES (1, 'Abhijeet', 32, 'm');
    INSERT INTO friends VALUES (2, 'Anjali', 29, 'f');
    INSERT INTO friends VALUES (3, 'Aayush', 27, 'm');
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: mysql-data-disk
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 1Gi