MySQL 是一個開源的關系型數據庫管理系統，廣泛應用于web應用程序領域。在Kubernetes中使用MySQL可以讓數據庫部署更加便捷和可靠。

在Kubernetes中部署MySQL有兩種方式：

1. 使用外部數據庫

apiVersion: v1
kind: Service
metadata:
name: db
spec:
selector:
app: mysql
ports:
- protocol: TCP
port: 3306
targetPort: 3306
clusterIP: None
apiVersion: apps/v1
kind: Deployment
metadata:
name: db
spec:
selector:
matchLabels:
app: mysql
strategy:
type: Recreate
template:
metadata:
labels:
app: mysql
spec:
containers:
- name: mysql
image: mysql:5.7
env:
- name: MYSQL_ROOT_PASSWORD
valueFrom:
secretKeyRef:
name: mysql-password
key: password
ports:
- containerPort: 3306
name: mysql
volumeMounts:
- name: mysql-persistent-storage
mountPath: /var/lib/mysql

2. 使用Kubernetes Operator

apiVersion: "mysqlpress.percona.com/v1"
kind: PerconaServerMySQL
metadata:
name: example-psmdb
namespace: default
spec:
secretName: example-psmdb-secret
size: 3
persistence:
storageClassName: "standard"
accessModes: ["ReadWriteOnce"]
size: "10Gi"
pxc:
image: percona/percona-xtradb-cluster
version: "5.7"
resources:
requests:
cpu: 250m
memory: 256Mi
resourcesLimiter:
enabled: false
proxysql:
image: percona/proxysql:2.0.10
resources:
requests:
cpu: 250m
memory: 256Mi
config:
admin_variables:
admin_credentials: "admin:password"
mysql_variables:
threads: "4"
backup:
image: percona/percona-xtrabackup
resources:
requests:
cpu: 250m
memory: 256Mi

總之，在Kubernetes中部署MySQL有多種方法和組件可供選擇，具體使用應根據實際需求和情況而定。