[root@centos181001 ~]# cat /etc/centos-release
CentOS Linux release 7.6.1810 (Core)
MariaDB [(none)]> status
--------------
mysql Ver 15.1 Distrib 5.5.60-MariaDB, for Linux (x86_64) using readline 5.1
节点1:11.11.11.61
节点2:11.11.11.62
setenforce 0
sed -i -r "/^SELINUX=/c SELINUX=disabled" /etc/selinux/config
which systemctl && systemctl stop firewalld
which systemctl && systemctl disable firewalld
which systemctl && systemctl stop iptables || service iptables stop
which systemctl && systemctl disable iptables || chkconfig iptables off
# 1.安装
yum install mariadb mariadb-server mariadb-libs mariadb-devel -y
# 2.启动MariaDB并设置开机自动启动
systemctl start mariadb
systemctl status mariadb
systemctl enable mariadb
# 3.初始化数据库
mysql_secure_installation
Enter current password for root (enter for none): # 输入密码,默认为空
Set root password? [Y/n] y # 是否设置root密码
Remove anonymous users? [Y/n] y # 是否移除anonymous用户
Disallow root login remotely? [Y/n] n # 是否禁止远程登录
Remove test database and access to it? [Y/n] y # 是否移除默认的演示数据库
Reload privilege tables now? [Y/n] y # 是否重新加载权限表?
注意根据节点1和节点2分别修改auto_increment_offset
vi /etc/my.cnf.d/server.cnf
#任意自然数n,只要保证两台MySQL主机不重复就可以了。
server-id=11
#开启二进制日志
log-bin=mysql-bin
# 步进值auto_imcrement。一般有n台主MySQL就填n
auto_increment_increment=2
#起始值。一般填第n台主MySQL。
auto_increment_offset=1
# auto_increment_offset=2
#忽略mysql库
binlog-ignore=mysql
#忽略information_schema库
binlog-ignore=information_schema
#要同步的数据库,默认所有库
replicate-do-db=test
systemctl restart mariadb
节点1:
mysql -uroot -pxiaoliu
grant replication slave, replication client on *.* to 'admin'@'11.11.11.62' identified by 'xiaoliu';
flush privileges;
节点2:
mysql -uroot -pxiaoliu
grant replication slave, replication client on *.* to 'admin'@'11.11.11.61' identified by 'xiaoliu';
flush privileges;
mysql -uroot -pxiaoliu
create database test;
commit;
mysql -uroot -pxiaoliu
show master status;
节点1:(填入对方服务器的日志文件和Position)
change master to master_host='11.11.11.62',
master_user='admin',
master_password='xiaoliu',
master_port=3306,
master_log_file='mysql-bin.000001',
master_log_pos=592,
master_connect_retry=30;
节点2:(填入对方服务器的日志文件和Position)
change master to master_host='11.11.11.61',
master_user='admin',
master_password='xiaoliu',
master_port=3306,
master_log_file='mysql-bin.000001',
master_log_pos=592,
master_connect_retry=30;
# 1.查看同步状态
show slave status\G;
# 可看到Slave_IO_State为空
# Slave_IO_Runngin和Slave_SQL_Running是No
# 表示Slave还是没有开始复制过程。
# 2.开启主从同步
start slave;
# 3.再次查看状态
show slave status\G;
# 主要查看以下3个状态
Slave_IO_State: Waiting for master to send event
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
# 4.可以分别在主从节点查看I/O线程创建的连接
show processlist\G;
节点1执行以下操作,登录节点2查看是否有同步过来:
use test;
create table linux(username varchar(15) not null,password varchar(15) not null);
insert into linux values ('XiaoMing', 'xiaoliu');
commit;
节点2执行以下操作,登录节点1查看是否有同步过来
use test;
insert into linux values ('aaabbb', '123456');
commit;