update

mysql/Demo/TwoMasterNodes/README.md

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+# 部署 MySQL 两节点互为主从+高可用
+
+- 在每台服务器上执行如下操作
+- 按实际环境修改
+    - docker-compose.yml
+    - keepalived/conf/keepalived.conf
+    - mysql/my.cnf
+
+- 创建目录
+    ```
+    grep '\<source:' docker-compose.yml | cut -d: -f2 | xargs mkdir -p
+    ```
+
+- 启动
+    ```
+    docker-compose up -d
+    ```
+
+- 查看日志，直至出现 "MySQL is ready for connections."
+    ```
+    docker-compose logs mysql
+    ```
+
+- 配置 mysql 互相同步
+    ```
+    # 进入mysql终端
+    docker exec -ti mysql mysql
+
+    # 设置同步源
+    CHANGE REPLICATION SOURCE TO 
+        SOURCE_HOST = '对方 host',
+        SOURCE_PORT = 3306,
+        SOURCE_USER = 'replicator',
+        SOURCE_PASSWORD = 'China_19$(10)!',
+        SOURCE_AUTO_POSITION = 1;
+
+    # 启动同步
+    START REPLICA;
+
+    # 查看同步状态
+    SHOW REPLICA STATUS\G
+    # 如果输出Replica_IO_Running: Yes和Replica_SQL_Running: Yes，则同步正常
+
+    # 退出 mysql
+    quit
+    ```
+
+- 在其中一台 mysql 服务器上导入初始数据
+

mysql/Demo/TwoMasterNodes/docker-compose.yml

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+version: "3.7"
+  
+services:
+  keepalived:
+    image: harbor.colben.cn/general/keepalived
+    container_name: keepalived
+    restart: "on-failure"
+    stop_grace_period: 1m
+    privileged: true
+    network_mode: host
+    volumes:
+    - type: bind
+      source: ./keepalived/conf
+      target: /etc/keepalived
+    - type: bind
+      source: ./keepalived/log
+      target: /var/log/keepalived
+
+  mysql:
+    image: harbor.colben.cn/general/mysql:8
+    container_name: mysql
+    restart: "on-failure"
+    stop_grace_period: 5m
+    privileged: true
+    network_mode: host
+    volumes:
+    - type: bind
+      source: ./mysql/my.cnf
+      target: /etc/my.cnf
+    - type: bind
+      source: ./mysql/binlog
+      target: /var/lib/mysql-bin
+    - type: bind
+      source: ./mysql/db
+      target: /var/lib/mysql
+    - type: bind
+      source: ./mysql/log
+      target: /var/log/mysql
+

mysql/Demo/TwoMasterNodes/keepalived/conf/keepalived.conf

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+global_defs {
+    router_id mysql1 # 在另一台服务器中，这里配置 mysql2
+    script_user root
+    enable_script_security
+}
+
+vrrp_script chk_mysql {
+    script "/sbin/ss -lnt | grep -q ':3306\>'"
+    interval 10
+    weight 0
+    fall 2
+    rise 2
+}
+
+vrrp_instance VI_1 {
+    state BACKUP
+    virtual_router_id 13
+    priority 150 # 在另一台服务器中，这里配置100
+    advert_int 2
+    nopreempt
+    interface eth0 # 这里的 eth0 是服务器的网卡名
+    track_script {
+        chk_mysql
+    }
+    authentication {
+        auth_type PASS
+        auth_pass El_en_mysql_1234
+    }
+    virtual_ipaddress {
+        虚拟IP/掩码 dev eth0 # 这里的eth0是服务器的网卡名
+    }
+}
+

mysql/Demo/TwoMasterNodes/mysql/log/init_sql/0.elcs-encrypt-user.sql

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+CREATE USER replicator@'%' IDENTIFIED BY 'China_19$(10)!';
+GRANT REPLICATION SLAVE ON *.* TO replicator@'%';
+FLUSH PRIVILEGES;
+

mysql/Demo/TwoMasterNodes/mysql/my.cnf

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+[mysqld]
+mysqlx = OFF
+skip-name-resolve = 1
+max-user-connections = 600
+
+## this should be less than 80% of total memory
+innodb-buffer-pool-size = xxxxG
+
+## this should be half of "innodb-buffer-pool-size"
+innodb-buffer-pool-instances = xxxx
+
+# binlog
+## this should be an unsigned tinyint and different with the other mysql server.
+server-id = xxxx
+log-bin = /var/lib/mysql-bin/master
+binlog-format = ROW
+binlog-expire-logs-seconds = 172800
+gtid-mode = ON
+enforce-gtid-consistency = TRUE
+
+# replication
+replicate-wild-ignore-table = information_schema.%
+replicate-wild-ignore-table = mysql.%
+replicate-wild-ignore-table = performance_schema.%
+replicate-wild-ignore-table = sys.%
+slave-parallel-workers = 2
+log-slave-updates = FALSE
+relay-log = /var/lib/mysql-bin/slave
+relay-log-recovery = TRUE
+