mysql数据库双机热备份实现

主服务器master：192.168.111.136
从服务器slave：192.168.111.137
MySQL 用户：replicate
MySQL 用户密码：root

service iptables stop

# 解压mysql安装包，主从服务器mysql版本保持一致
cd /home
tar -xvf MySQL.rpm-bundle.tar
# 安装数据库
rpm -ivh MySQL-*rpm --nodeps --force 

service mysql start
# 首次登录不需要密码，直接enter
mysql -uroot -p

# 授权root并修改密码为root
grant  all privileges on  *.* to 'root'@'localhost' identified by 'root';
# 仅修改密码：alter user 'root'@'localhost' indentified by 'root';
flush privileges;

cd /etc/sysconfig/network-scripts/
cat ifcfg-eth0
# 如下内容
DEVICE=eth0
HWADDR=00:0C:29:6D:7A:FD
TYPE=Ethernet
UUID=859d5289-7bf4-423f-aad4-dd2f4a0becbb
ONBOOT=no
NM_CONTROLLED=yes
BOOTPROTO=dhcp
vi ifcfg-eth0
# 改成
DEVICE=eth0
HWADDR=00:0C:29:6D:7A:FD
TYPE=Ethernet
UUID=859d5289-7bf4-423f-aad4-dd2f4a0becbb
ONBOOT=yes
NM_CONTROLLED=yes
BOOTPROTO=static
IPADDR=192.168.111.137
NETMASK=255.255.255.0
GATEWAY=192.168.111.1
DNS1=8.8.8.8
DNS2=8.8.4.4
# 重启网络
sudo systemctl restart network

# 主服务器创建用户
grant replication slave on *.* to  'replicate'@'192.168.111.137' identified by  'root';
flush privileges;

# 在从服务器192.168.111.137 上测试
mysql -h192.168.111.136 -ureplicate -proot;

vi /etc/my.cnf
# 添加如下内容
[mysqld]
server-id=1
log-bin=mysql-bin
binlog-do-db=test
binlog-ignore-db=mysql

service mysql restart

# 进入mysql服务
mysql -uroot -proot
# 刷新表的读取锁
flush tables with read lock;
# 查看主服务器的状态
show master status\G;
# 解锁表
unlock tables;

vi /etc/my.cnf
# 添加如下内容
[mysqld]
server-id=2
log-bin=mysql-bin
replicate-do-db=test
replicate-ignore-db = mysql,information_schema,performance_schema

service mysql restart

# 先停止slave服务线程
stop slave;
# 指定同步位置
change master to master_host='192.168.111.136',
master_user='replicate',
master_password='root',
master_log_file='mysql-bin.000001',
master_log_pos=107;
# master_host 主服务ip
# master_user 同步用户
# master_log_file File日志编号
# master_log_pos Position位置
# 刷新权限
flush privileges;

show slave status\G;
# Slave_IO_Running: Yes
# Slave_SQL_Running: Yes
# 表示设置成功

use test;
create table tb_mobile(mobile varchar(20), time timestamp default now())
insert into tb_mobile (mobile) values('13456789898');

use test;
select * from tb_mobile;

服务器 A：192.168.111.136
服务器 B：192.168.111.137
MySQL 用户：replicate
MySQL 用户密码：root

vi /etc/my.cnf
# 如下配置
[mysqld]
server-id=1
log-bin=mysql-bin
binlog-do-db=test
binlog-ignore-db=mysql,information_schema,performance_schema
# 添加以下配置以启用复制过滤器
replicate-do-db=test
replicate-ignore-db=mysql,information_schema,performance_schema

create user 'replicate'@'%' identified by 'root';
grant replication slave on *.* to 'replicate'@'%';
flush privileges;
# %代表任何主机

show master status;

vi /etc/my.cnf
# 如下配置
[mysqld]
server-id=2
log-bin=mysql-bin
binlog-do-db=test
binlog-ignore-db=mysql,information_schema,performance_schema
# 添加以下配置以启用复制过滤器
replicate-do-db=test
replicate-ignore-db=mysql,information_schema,performance_schema

create user 'replicate'@'%' identified by 'root';
grant replication slave on *.* to 'replicate'@'%';
flush privileges;

show master status;

change master to
master_host='192.168.111.137',
master_user='replicate',
master_password='root',
master_log_file='mysql-bin.000001',  -- 使用服务器 b 上实际的日志文件名
master_log_pos=107;  -- 使用服务器 b 上实际的日志位置

start slave;

change master to
master_host='192.168.111.136',
master_user='replicate',
master_password='root',
master_log_file='mysql-bin.000001',  -- 使用服务器 a 上实际的日志文件名
master_log_pos=107;  -- 使用服务器 a 上实际的日志位置

start slave;

show slave status\G;

use test;
insert into tb_mobile (mobile) values('13456789898');
select * from tb_mobile;