MySQL高可用性之Keepalived+MySQL（双主热备）

[root@web01 ~]#  setenforce 0
[root@web01 ~]#  systemctl stop firewalld
[root@web02 ~]#  setenforce 0
[root@web02 ~]#  systemctl stop firewalld

[root@web01 ~]#  yum -y install mariadb mariadb-server keepalived
[root@web02 ~]#  yum -y install mariadb mariadb-server keepalived

[root@web01 ~]# vim /etc/my.cnf
[mysqld]
server-id=1  #设置服务器id，为1表示主服务器
log-bin=mysql-bin  #启动MySQ二进制日志系统
auto-increment-increment = 2   #字段变化增量值
auto-increment-offset = 1 #初始字段ID为1
slave-skip-errors = all #忽略所有复制产生的错误
binlog-ignore-db=mysql,information_schema #忽略写入binlog日志的库
:wq #保存退出
[root@web01 ~]# systemctl restart mariadb

[root@web02 ~]# vim /etc/my.cnf
[mysqld]
server-id=2  #设置服务器id，为2表示从服务器
log-bin=mysql-bin  #启动MySQ二进制日志系统
auto-increment-increment = 2   #字段变化增量值
auto-increment-offset = 1 #初始字段ID为1
slave-skip-errors = all #忽略所有复制产生的错误
binlog-ignore-db=mysql,information_schema #忽略写入binlog日志的库
:wq #保存退出
[root@web02 ~]# systemctl restart mariadb

[root@web01 ~]# mysql -u root -p   #输入密码进入mariadb
MariaDB [(none)]> create database test; #创建数据库
MariaDB [(none)]> use test; #进入数据库内
MariaDB [(none)]>CREATE TABLE mybook (name char(15),price int,pages int);  #创建表单
MariaDB [(none)]>INSERT INTO mybook(name,price,pages) VALUES(‘linuxprobe‘, ‘60‘, ‘518‘); #向表单中添加数据
MariaDB [(none)]>SELECT * FROM mybook;  #查看表单中的数据
+------------+-------+-------+
| name       | price | pages |
+------------+-------+-------+
| linuxprobe |    60 |   518 |
+------------+-------+-------+
row in set (0.00 sec)

MariaDB [test]> grant replication slave on *.* to ‘admin‘@‘%‘ identified by ‘123456‘;  #用户名为admin,密码为123456
MariaDB [(none)]> show master status; #记录File和Postion中的数据，等下需要填到从服务器配置里
+------------------+----------+--------------+------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000003 |     1097 | test         | mysql            |
+------------------+----------+--------------+------------------+
row in set (0.00 sec)
MariaDB [(none)]> grant replication slave on *.* to ‘check‘@‘%‘ identified by ‘123456‘;
MariaDB [(none)]> flush  privileges;
MariaDB [(none)]> change master to master_host=‘192.168.11.84‘, master_user=‘check‘, master_password=‘123456‘, master_log_file=‘mysql-bin.000004‘, master_log_pos=245;