Kubernetes是一個廣泛使用的容器編排系統，可以自動化容器應用程序的部署、擴展和管理。Kubernetes的Ingress是一種API對象，用于管理對Kubernetes集群內服務的外部訪問，實現了負載均衡、SSL終止和基于名稱的虛擬托管。可以使用Kubernetes的Ingress代理MySQL，實現在Kubernetes集群外部訪問MySQL的功能。

要使用Kubernetes的Ingress代理MySQL，需要使用MySQL的代理工具，比如MaxScale。MaxScale是一個Kubernetes原生的代理工具，可以實現多端口前置代理、MySQL負載均衡和故障切換、MySQL安全和監控等功能，而且可以無縫整合到Kubernetes集群中。

apiVersion: v1
kind: Secret
metadata:
name: maxscale-secrets
type: Opaque
data:
admin-user: YWRtaW4= #base64編碼的用戶名
admin-pass: cGFzc3dvcmQ= #base64編碼的密碼
---
apiVersion: v1
kind: ConfigMap
metadata:
name: maxscale-config
data:
maxscale.cnf: |
[maxscale]
log_info=1
[CLI]
user=admin
passwd=password
[server1]
type=server
address=10.0.0.1
port=3306
protocol=MariaDBBackend
[server2]
type=server
address=10.0.0.2
port=3306
protocol=MariaDBBackend
[Galera-Listener]
type=listener
service_type=readwritesplit
protocol=MariaDBClient
port=3306
routers=slaves
user=admin
passwd=password
max_slave_connections=100%
[slaves]
type=service
router=readconnroute
servers=server1,server2
user=admin
passwd=password
[Galera-Monitor]
type=monitor
module=galeramon
servers=server1,server2
user=monitor
passwd=password
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: maxscale-deployment
spec:
replicas: 1
selector:
matchLabels:
app: maxscale
template:
metadata:
labels:
app: maxscale
spec:
containers:
- name: maxscale
image: mariadb/maxscale:2.5.11
command: ["/usr/bin/maxscale", "-d"]
ports:
- containerPort: 4006
name: admin
- containerPort: 3306
name: mysql
volumeMounts:
- name: maxscale-config
mountPath: /etc/maxscale.cnf
subPath: maxscale.cnf
readOnly: true
- name: maxscale-secrets
mountPath: /run/secrets/
readOnly: true
volumes:
- name: maxscale-config
configMap:
name: maxscale-config
- name: maxscale-secrets
secret:
secretName: maxscale-secrets
---
apiVersion: v1
kind: Service
metadata:
name: maxscale-service
annotations:
service.beta.kubernetes.io/aws-load-balancer-backend-protocol: tcp
service.beta.kubernetes.io/aws-load-balancer-ssl-ports: "443"
service.beta.kubernetes.io/aws-load-balancer-ssl-cert: arn:aws:acm:us-west-2:123456789012:certificate/12345678-abcd-1234-abcd-1234567890ab
spec:
type: LoadBalancer
selector:
app: maxscale
ports:
- name: admin
port: 4006
targetPort: 4006
- name: mysql
port: 3306
targetPort: 3306

以上是代理MySQL的MaxScale的Kubernetes的Ingress的YAML文件示例。其中，包括了Secret、 ConfigMap、Deployment和Service等四個Kubernetes的對象。Secret用于保存MaxScale的管理用戶的用戶名和密碼，可以使用kubectl create secret命令創建。ConfigMap用于保存MaxScale的配置文件maxscale.cnf，可以使用kubectl create configmap命令創建。Deployment用于定義MaxScale的Pod的副本數量、容器鏡像、命令、端口和掛載的卷等信息，可以使用kubectl create deployment命令創建。Service用于定義MaxScale的端口、協議、負載均衡方式和外部訪問的入口等信息，可以使用kubectl create service命令創建。