355 lines
7.0 KiB
Markdown
355 lines
7.0 KiB
Markdown
> 本文作者：丁辉
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# 部署Mysql主从
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## 基础准备
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创建命名空间
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```bash
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kubectl create ns mysql
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```
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## 开始部署
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### 主节点配置
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1. 编辑 mysql 配置文件
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```bash
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vi my.cnf
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```
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内容如下
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```bash
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[mysqld]
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pid-file = /var/run/mysqld/mysqld.pid
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socket = /var/run/mysqld/mysqld.sock
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datadir = /var/lib/mysql
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secure-file-priv= NULL
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# Disabling symbolic-links is recommended to prevent assorted security risks
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symbolic-links=0
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# 服务端默认utf8编码
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character-set-server=utf8mb4
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# 默认存储引擎
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default-storage-engine=INNODB
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# 主从配置
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log-bin=binlog
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server-id=121
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gtid-mode=on
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enforce-gtid-consistency=on
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log-slave-updates=on
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expire_logs_days=14
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# Compatible with versions before 8.0
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default_authentication_plugin=mysql_native_password
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skip-host-cache
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skip-name-resolve
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[client]
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#设置客户端编码
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default-character-set=utf8mb4
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[mysql]
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# 设置mysql客户端默认编码
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default-character-set=utf8mb4
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# Custom config should go here
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!includedir /etc/mysql/conf.d/
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# Custom config should go here
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!includedir /etc/mysql/conf.d/
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```
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2. 创建 configmap
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```bash
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kubectl create configmap mysql-master-conf --from-file=./my.cnf -n mysql
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```
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3. 编辑 Yaml
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```bash
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vi mysql-master.yaml
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```
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内容如下
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```yaml
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apiVersion: apps/v1
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kind: StatefulSet
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metadata:
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namespace: mysql
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name: mysql-master
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spec:
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replicas: 1
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serviceName: mysql-master-service
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selector:
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matchLabels:
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app: mysql-master
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template:
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metadata:
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labels:
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app: mysql-master
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spec:
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containers:
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- name: mysql-master
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image: mysql:8.0
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env:
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- name: MYSQL_ROOT_PASSWORD
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value: password
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volumeMounts:
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- mountPath: /var/lib/mysql
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name: data
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- name: file
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mountPath: /etc/mysql/my.cnf
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subPath: my.cnf
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ports:
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- containerPort: 3306
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protocol: TCP
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livenessProbe:
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exec:
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command:
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- mysql
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- --user=root
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- --password=password
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- --execute=SELECT 1
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initialDelaySeconds: 10 #启动后等待10秒开始检测
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periodSeconds: 10 #每隔10秒检测一次
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nodeName: #node1
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volumes:
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- name: data
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hostPath:
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path: /opt/mysql/data
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- name: file
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configMap:
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name: mysql-master-conf
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---
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apiVersion: v1
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kind: Service
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metadata:
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namespace: mysql
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name: mysql-master-service
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spec:
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selector:
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app: mysql-master
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ports:
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- port: 3306
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targetPort: 3306
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protocol: TCP
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type: ClusterIP
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```
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4. 部署数据库主
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```bash
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kubectl apply -f mysql-master.yaml
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```
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### 从节点配置
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1. 编辑 mysql 配置文件
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```bash
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vi my.cnf
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```
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内容如下
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```bash
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[mysqld]
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pid-file = /var/run/mysqld/mysqld.pid
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socket = /var/run/mysqld/mysqld.sock
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datadir = /var/lib/mysql
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secure-file-priv= NULL
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# Disabling symbolic-links is recommended to prevent assorted security risks
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symbolic-links=0
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# 服务端默认utf8编码
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character-set-server=utf8mb4
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# 默认存储引擎
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default-storage-engine=INNODB
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# 主从配置
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server-id=122
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gtid-mode=on
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enforce-gtid-consistency=on
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log-slave-updates=on
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expire_logs_days=14
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# Compatible with versions before 8.0
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default_authentication_plugin=mysql_native_password
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skip-host-cache
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skip-name-resolve
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[client]
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#设置客户端编码
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default-character-set=utf8mb4
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[mysql]
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# 设置mysql客户端默认编码
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default-character-set=utf8mb4
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# Custom config should go here
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!includedir /etc/mysql/conf.d/
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# Custom config should go here
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!includedir /etc/mysql/conf.d/
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```
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2. 创建 configmap
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```bash
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kubectl create configmap mysql-slave-conf --from-file=./my.cnf -n mysql
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```
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3. 编辑 Yaml
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```bash
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vi mysql-slave.yaml
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```
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内容如下
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```yaml
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apiVersion: apps/v1
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kind: StatefulSet
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metadata:
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namespace: mysql
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name: mysql-slave
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spec:
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replicas: 1
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serviceName: mysql-slave-service
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selector:
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matchLabels:
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app: mysql-slave
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template:
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metadata:
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labels:
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app: mysql-slave
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spec:
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containers:
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- name: mysql-slave
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image: mysql:8.0
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env:
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- name: MYSQL_ROOT_PASSWORD
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value: password
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volumeMounts:
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- mountPath: /var/lib/mysql
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name: data
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- name: file
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mountPath: /etc/mysql/my.cnf
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subPath: my.cnf
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ports:
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- containerPort: 3306
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protocol: TCP
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livenessProbe:
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exec:
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command:
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- mysql
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- --user=root
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- --password=password
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- --execute=SELECT 1
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initialDelaySeconds: 10 #启动后等待10秒开始检测
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periodSeconds: 10 #每隔10秒检测一次
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nodeName: #node2
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volumes:
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- name: data
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hostPath:
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path: /opt/mysql/data
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- name: file
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configMap:
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name: mysql-slave-conf
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---
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apiVersion: v1
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kind: Service
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metadata:
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namespace: mysql
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name: mysql-slave-service
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spec:
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selector:
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app: mysql-slave
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ports:
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- port: 3306
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targetPort: 3306
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protocol: TCP
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type: ClusterIP
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```
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4. 部署数据库从
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```bash
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kubectl apply -f mysql-slave.yaml
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```
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### 配置主从同步
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1. 登录主节点
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```bash
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kubectl exec -it mysql-master-0 -n mysql bash
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```
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2. 登录数据库
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```bash
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mysql -u root -ppassword
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```
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3. 配置
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```bash
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CREATE USER 'slave'@'%' IDENTIFIED WITH mysql_native_password BY 'slave';
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GRANT REPLICATION SLAVE ON *.* TO 'slave'@'%';
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flush privileges;
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SHOW MASTER STATUS;
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```
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4. 登录从节点
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```bash
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kubectl exec -it mysql-slave-0 -n mysql bash
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```
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5. 登录数据库
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```bash
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mysql -u root -ppassword
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```
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6. 配置
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```bash
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CHANGE MASTER TO
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MASTER_HOST='IP',
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MASTER_USER='slave',
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MASTER_PASSWORD='slave',
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MASTER_PORT=3306,
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MASTER_LOG_FILE='binlog.00000*', #列：binlog.000001
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MASTER_LOG_POS=***; #列：868
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```
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7. 开启主从同步
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```bash
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start slave;
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```
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8. 查看同步状态
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```bash
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show slave status\G;
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```
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> 查看到这两个参数为 Yes 则代表配置成功
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- Slave_IO_Running: Yes
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- Slave_SQL_Running: Yes
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9. 登录主节点，创建数据库
|
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```bash
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create database console;
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create database region;
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```
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> 从节点查看仓库是否已同步
|
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