k8s集群部署mysql高可用
时间: 2023-11-07 11:02:20 浏览: 172
k8s集群部署mysql高可用的方法可以通过以下步骤进行实现:
1. 首先,确保已经安装好StorageClass,可以参考文章中的指南进行安装。
2. 下载并准备mysql镜像:
```
docker pull mysql:5.7
docker save -o mysql-5.7.tar mysql:5.7
```
3. 创建ConfigMap,用于存储mysql的配置信息,包括master和slave的配置。可以使用以下yaml文件创建ConfigMap:
```
apiVersion: v1
kind: ConfigMap
metadata:
name: mysql-cluster
namespace: mysql
labels:
app: mysql-cluster
data:
master.cnf: |
# Apply this config only on the master.
[mysqld]
log-bin
log_bin_trust_function_creators=1
lower_case_table_names=1
slave.cnf: |
# Apply this config only on slaves.
[mysqld]
super-read-only
log_bin_trust_function_creators=1
```
使用以下命令创建ConfigMap:
```
kubectl apply -f mysql-configmap.yaml
```
4. 创建PersistentVolumeClaim(PVC),用于存储mysql的数据。可以使用以下yaml文件创建PVC:
```
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: mysql-data
namespace: mysql
labels:
app: mysql-cluster
spec:
storageClassName: <your-storage-class>
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 10Gi
```
使用以下命令创建PVC:
```
kubectl apply -f mysql-pvc.yaml
```
5. 创建Service,用于暴露mysql服务。可以使用以下yaml文件创建Service:
```
apiVersion: v1
kind: Service
metadata:
name: mysql
namespace: mysql
labels:
app: mysql-cluster
spec:
selector:
app: mysql-cluster
ports:
- name: mysql
port: 3306
targetPort: 3306
```
使用以下命令创建Service:
```
kubectl apply -f mysql-service.yaml
```
6. 创建StatefulSet,用于管理mysql的Pod。可以使用以下yaml文件创建StatefulSet:
```
apiVersion: apps/v1
kind: StatefulSet
metadata:
name: mysql
namespace: mysql
labels:
app: mysql-cluster
spec:
serviceName: mysql
replicas: 3
selector:
matchLabels:
app: mysql-cluster
template:
metadata:
labels:
app: mysql-cluster
spec:
containers:
- name: mysql
image: mysql:5.7
env:
- name: MYSQL_ROOT_PASSWORD
valueFrom:
secretKeyRef:
name: mysql-secret
key: root-password
ports:
- containerPort: 3306
volumeMounts:
- name: mysql-data
mountPath: /var/lib/mysql
subPath: mysql-data
- name: mysql-config
mountPath: /etc/mysql/conf.d
readinessProbe:
exec:
command:
- "/bin/sh"
- "-c"
- "mysqladmin ping -h 127.0.0.1 -u root -p$MYSQL_ROOT_PASSWORD"
livenessProbe:
exec:
command:
- "/bin/sh"
- "-c"
- "mysqladmin ping -h 127.0.0.1 -u root -p$MYSQL_ROOT_PASSWORD"
volumeClaimTemplates:
- metadata:
name: mysql-data
labels:
app: mysql-cluster
spec:
storageClassName: <your-storage-class>
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 10Gi
```
使用以下命令创建StatefulSet:
```
kubectl apply -f mysql-statefulset.yaml
```
通过以上步骤,可以在k8s集群中部署mysql高可用。
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