Kubernetes（k8s）是一個流行的容器平臺，可用于管理容器化應用程序。在大型應用程序中，需要使用數據庫存儲和管理數據。MySQL是最常用的關系數據庫管理系統之一。本文將介紹如何在Kubernetes中部署MySQL集群。

步驟如下：

第一步：創建MySQL StatefulSet。

apiVersion: apps/v1
kind: StatefulSet
metadata:
name: mysql
labels:
app: mysql
spec:
selector:
matchLabels:
app: mysql
serviceName: mysql
replicas: 3
template:
metadata:
labels:
app: mysql
spec:
containers:
- name: mysql
image: mysql:5.7
env:
- name: MYSQL_ROOT_PASSWORD
value: "password"
ports:
- containerPort: 3306
name: mysql
volumeMounts:
- name: mysql-persistent-storage
mountPath: /var/lib/mysql
volumes:
- name: mysql-persistent-storage
persistentVolumeClaim:
claimName: mysql-pv-claim

第二步：創建MySQL服務（Service）。

apiVersion: v1
kind: Service
metadata:
name: mysql
labels:
app: mysql
spec:
ports:
- port: 3306
name: mysql
clusterIP: None
selector:
app: mysql

第三步：為MySQL添加持久化存儲。

kind: PersistentVolumeClaim
apiVersion: v1
metadata:
name: mysql-pv-claim
spec:
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 10Gi
storageClassName: standard

第四步：創建MySQL配置。

apiVersion: v1
kind: ConfigMap
metadata:
name: mysql
labels:
app: mysql
data:
my.cnf: |-
[mysqld]
server-id=1
log-bin=mysql-bin
binlog-format=ROW

第五步：在集群中運行MySQL的備份。

apiVersion: batch/v1beta1
kind: CronJob
metadata:
name: mysql-backup
spec:
schedule: "0 12 * * *"
jobTemplate:
spec:
template:
spec:
containers:
- name: mysql-backup
image: mysql:5.7
command: ["/bin/sh", "-c"]
args:
- mysqldump --opt -h mysql -u root -ppassword >/mnt/backup/mysql-$(date +%Y%m%d%H%M%S).sql
volumeMounts:
- name: backup-storage
mountPath: /mnt/backup
restartPolicy: OnFailure
volumes:
- name: backup-storage
persistentVolumeClaim:
claimName: mysql-backup-pv-claim
successfulJobsHistoryLimit: 3
failedJobsHistoryLimit: 3

以上就是在Kubernetes中部署MySQL集群的全部步驟，您可以根據業務需求適當調整。