环境设置

1master 1slave

192.168.1.40 master

192.168.1.41 slave1

安装mysql

Yum 安装方式(2个服务器同时装)

rpm -qpl mysql57-community-release-el7-11.noarch.rpm

rpm -ivh mysql57-community-release-el7-11.noarch.rpm

yum -y install mysql-client mysql-server

systemctl enable mysqld

systemctl start mysqld

systemctl status mysqld

grep 'password' /var/log/mysqld.log |head -n 1

mysql 主从构建

MASTER配置文件设置

Master 配置文件中开启bin-log文件，设置server-id，设置完毕重新启动mysql

[root@mysqlcluster1 ~]# vi /etc/my.cnf

[mysqld]

datadir=/var/lib/mysql

socket=/var/lib/mysql/mysql.sock

symbolic-links=0

log-bin=mysql-bin

server-id= 1

[mysql_safe]

log-error=/var/log/mysqld.log

pid-file=/var/run/mysqld/mysqld.pid

server-id：为主服务器A的ID值

log-bin：二进制变更日值

master上添加复制用户

授权同步用户和密码

登录mysql 数据库，新建数据库账号，赋予同步权限

mysql -uroot -p

在主服务器新建一个用户赋予“REPLICATION SLAVE”的权限。你不需要再赋予其它的权限。在下面的命令，把X.X.X.X替换为从服务器的IP。

mysql>CREATE USER 'user'@ 'X.X.X.X' IDENTIFIED BY 'password';

mysql>GRANT REPLICATION SLAVE ON . TO 'user'@'X.X.X.X' IDENTIFIED BY 'password';

执行以下命令锁定数据库以防止写入数据。

mysql>FLUSH TABLES WITH READ LOCK;

mysql> GRANT REPLICATION SLAVE ON . TO 'tongbu'@'%' IDENTIFIED BY 'P@ssw0rd';

设置从库slave

Slave执行change master绑定主库

slave配置文件设置

vi /etc/my.cnf

[mysqld]

datadir=/var/lib/mysql

socket=/var/lib/mysql/mysql.sock

symbolic-links=0

log-bin=mysql-bin

server-id= 2

[mysqld_safe]

log-error=/var/log/mysqld.log

pid-file=/var/run/mysqld/mysqld.pid

执行change master

mysql>CHANGE MASTER TO

MASTER_HOST='X.X.X.X',

MASTER_USER='user',

MASTER_PASSWORD='password',

MASTER_PORT=3306,

MASTER_LOG_FILE='mysql-bin.000001',

MASTER_LOG_POS=98,

MASTER_CONNECT_RETRY=10;

MASTER_HOST:主服务器的IP。

MASTER_USER：配置主服务器时建立的用户名

MASTER_PASSWORD：用户密码

MASTER_PORT：主服务器mysql端口，如果未曾修改，默认即可。

mysql> change master to master_host='192.168.1.51',

-> master_user='tongbu',

-> master_password='P@ssw0rd',

-> master_log_file='mysql-bin.000001',

-> master_log_pos=444;

Query OK, 0 rows affected, 2 warnings (0.01 sec)

change master to master_host='192.168.1.51',master_user='tongbu',master_password='P@ssw0rd',master_log_file='mysql-bin.000002',MASTER_LOG_POS=1084;

启动slave服务

mysql> start slave;

测试

在master数据库服务器创建一个数据库文件

mysql> show slave status\G

mysql> create database mysqltesting charset=utf8;

去从数据库查看

mysql> show databases;

查看文件内容

查看bin-log文件

mysql> show master status;

从库是从bin-log 444之后同步

mysql-bin.000001 文件位置在/var/lib/mysql/

ll /var/lib/mysql

bin-log文件内容

[root@mysqlcluster1 mysql]# mysqlbinlog mysql-bin.000002 |more

Bin-log文件中都是一些执行的步骤

记录了时间段及编号段内的执行的内容

relay-log日志

mysqlbinlog mysqlcluster2-relay-bin.000002 |more

master.info文件

Master.info文件在slave机器上，主要记录了同步账号和密码

cat master.info