Linux企业实战-----mysql共享+主从复制

Table of Contents

不同设备间的mysql共享

nginx+php+phpMyadmin管理mysql

用phpmyadmin管理其他主机的数据库

mysql的主从复制

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不同设备间的mysql共享

将server2中的mysql共享至server3，并在server3启动mysql

server2：

[root@server2 local]# rsync -a mysql server3:/usr/local/
root@server3's password: 
[root@server2 mysql]# scp /etc/my.cnf server3:/etc/
root@server3's password: 
my.cnf           100%  181   166.8KB/s   00:00                                                                                                

server3：

[root@server3 mysql]# groupadd -g 1001 mysql
[root@server3 mysql]# useradd -u 1001 -g 1001 -M -d /usr/local/mysql/ -s /sbin/nologin mysql
[root@server3 mysql]# mkdir -p /data/mysql
[root@server3 mysql]# chown mysql.mysql /data/mysql/

[root@server3 mysql]# vim ~/.bash_profile 
[root@server3 mysql]# source  ~/.bash_profile 
/usr/local/mysql/bin/mysqld
[root@server3 mysql]# mysqld --initialize --user=mysql
2020-08-16T06:03:02.304051Z 0 [System] [MY-013169] [Server] /usr/local/mysql/bin/mysqld (mysqld 8.0.21) initializing of server in progress as process 13713
2020-08-16T06:03:02.320821Z 1 [System] [MY-013576] [InnoDB] InnoDB initialization has started.
2020-08-16T06:03:03.635711Z 1 [System] [MY-013577] [InnoDB] InnoDB initialization has ended.
2020-08-16T06:03:05.111290Z 6 [Note] [MY-010454] [Server] A temporary password is generated for root@localhost: ?sF2fqh9u2ku
[root@server3 mysql]# cd support-files/
[root@server3 support-files]# cp mysql.server /etc/init.d/mysqld
[root@server3 support-files]# /etc/init.d/mysqld start
Starting MySQL.Logging to '/data/mysql/server3.err'.
. SUCCESS! 
[root@server3 support-files]# mysql -p?sF2fqh9u2ku
mysql> alter user root@localhost identified by 'Zxn@@0823';
mysql> ^DBye
[root@server3 support-files]# mysql -pZxn@@0823

 

nginx+php+phpMyadmin管理mysql

server2:
unzip phpMyAdmin-5.0.2-all-languages.zip 
mv phpMyAdmin-5.0.2-all-languages /usr/local/nginx/html/phpmyadmin
cd /usr/local/php/lib/
vim php.ini
systemctl start php-fpm
cd /usr/local/nginx/conf/
vim nginx.conf       
systemctl start nginx

访问172.25.11.2/mysqladmin

登陆后可通过phpmyadmin管理数据库

 

用phpmyadmin管理其他主机的数据库

server2:

[root@server2 phpmyadmin]# cp config.sample.inc.php config.inc.php
[root@server2 phpmyadmin]# vim config.inc.php 

server3:

mysql -pZxn@@0823
mysql> create user root@'172.25.11.%' identified by 'Zxn@@0823';

mysql> grant all on *.* to root@'172.25.11.%';

mysql> flush privileges;

mysql> create user zxn@'172.25.11.%' identified by 'Zxn@@0823';

mysql> create database westos;

mysql> grant all on westos.* to zxn@'172.25.11.%';

在phpadmin中创建表user_tb

 定义表中的数据类型

添加数据 王八蛋 与666

在mysql中查看创建的表

mysql> use westos;

mysql> select * from user_tb;
+-----------+----------+
| nanme     | password |
+-----------+----------+
| 王八蛋    |      666 |
| 王八蛋    |      666 |
+-----------+----------+
2 rows in set (0.00 sec)

 

mysql的主从复制

master设置（server2）：

[root@server2 mysql]# vim /etc/my.cnf
[root@server2 mysql]# /etc/init.d/mysqld restart
Shutting down MySQL. SUCCESS! 
Starting MySQL. SUCCESS! 
[root@server2 mysql]# mysql -pZxn@@0823

mysql> create user 'repl'@'172.25.11.%' identified by 'Zxn@@0823';    创建复制用户

mysql> grant replication slave on *.* to 'repl'@'172.25.11.%';       授予用户权限

mysql> flush privileges;

slave（server3）设置:
mysql -h 172.25.11.2 -u repl -pZxn@@0823  检测复制用户是否创建成功

vim /etc/my.cnf

/etc/init.d/mysqld restart

此时切回server2：
查看matser状态

mysql> show master status;
+------------------+----------+--------------+------------------+-------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000001 |     1200 |              |                  |                   |
+------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)

server3：
配置slave：

mysql -pZxn@@0823

mysql> change master to
    -> master_host='172.25.11.2',
    -> master_user='repl',
    -> master_password='Zxn@@0823',
    -> master_log_file='mysql-bin.000001',
    -> master_log_pos=1200,
    -> get_master_public_key=1;
Query OK, 0 rows affected, 2 warnings (0.02 sec)

mysql> start slave;
Query OK, 0 rows affected (0.01 sec)

mysql> show slave status\G;
#以下两行信息若都显示yes，则证明主从复制成功
             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes

测试主从复制：

在server2中创建一个表

切到server3发现2中新建的表3也可以看到，主从复制成功