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这篇文章主要介绍“怎么安装 Mysql 双机热备”，在日常操作中，相信很多人在怎么安装 Mysql 双机热备问题上存在疑惑，丸趣 TV 小编查阅了各式资料，整理出简单好用的操作方法，希望对大家解答”怎么安装 Mysql 双机热备”的疑惑有所帮助！接下来，请跟着丸趣 TV 小编一起来学习吧！
一、安装 mysql
#tar -xf mysql-5.7.18-1.el6.x86_64.rpm-bundle.tar
#yum localinstall *.rpm1.1 修改 mysql 配置
# For advice on how to change settings please see
# http://dev.mysql.com/doc/refman/5.7/en/server-configuration-defaults.html
[mysqld]
# Remove leading # and set to the amount of RAM for the most important data
# cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%.
# innodb_buffer_pool_size = 128M
# Remove leading # to turn on a very important data integrity option: logging
# changes to the binary log between backups.
# log_bin
# Remove leading # to set options mainly useful for reporting servers.
# The server defaults are faster for transactions and fast SELECTs.
# Adjust sizes as needed, experiment to find the optimal values.
# join_buffer_size = 128M
# sort_buffer_size = 2M
# read_rnd_buffer_size = 2M
datadir=/data/mysql
socket=/var/lib/mysql/mysql.sock
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
explicit_defaults_for_timestamp=true
tmpdir=/tmp
[client]
default-character-set=utf8mb4
[mysqld]
character_set_server=utf8mb41.2 权限修改
[root@172 ~]# chown -R mysql:mysql /data
[root@172 ~]# chmod 777 -R /data/
[root@172 ~]# chmod -R 777 /tmp1.3 启动 mysql 服务
[root@172 ~]# service mysqld restart
Stopping mysqld: [FAILED]
Initializing MySQL database: [ OK ]
Installing validate password plugin: [ OK ]
Starting mysqld: [ OK ]1.4 查看 temp 密码
more /var/log/mysqld.log |grep temporary1.5 修改 root 密码 db1
ALTER USER root @ localhost IDENTIFIED BY *****
flush privileges;
exit;db2
ALTER USER root @ localhost IDENTIFIED BY *****
flush privileges;
exit;二、配置主从同步 master1172.28.8.187master2172.28.8.1882.1 配置 master1 给 master2 登录的密码
Master1
create user repl identified by *****
GRANT REPLICATION SLAVE ON *.* TO repl @ 172.28.8.188 IDENTIFIED BY *****
FLUSH PRIVILEGES;
mysql create database mydb default charset utf8;在 172.28.8.188 测试 repuser 是否能登录 172.28.8.187 上的数据库
mysql -urepl -p -h272.28.8.1872.1.1 Master1 配置 my.cnf
# For advice on how to change settings please see
# http://dev.mysql.com/doc/refman/5.7/en/server-configuration-defaults.html
[mysqld]
# Remove leading # and set to the amount of RAM for the most important data
# cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%.
# innodb_buffer_pool_size = 128M
# Remove leading # to turn on a very important data integrity option: logging
# changes to the binary log between backups.
# log_bin
# Remove leading # to set options mainly useful for reporting servers.
# The server defaults are faster for transactions and fast SELECTs.
# Adjust sizes as needed, experiment to find the optimal values.
# join_buffer_size = 128M
# sort_buffer_size = 2M
# read_rnd_buffer_size = 2M
datadir=/data/mysql
socket=/var/lib/mysql/mysql.sock
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
explicit_defaults_for_timestamp=true
tmpdir=/tmp
character_set_server=utf8mb4
server-id=177
log-bin=/var/log/mysql/mysql-bin.log
read-only=0
binlog-ignore-db=mysql
binlog-ignore-db=information_schema
expire_logs_days= 365
auto-increment-increment = 2
auto-increment-offset = 1
[client]
default-character-set=utf8mb42.2 Master2 配置 my.cnf
# 除 server-id 外，其他与 master1 保持一致 2.2.1 Master2 给 Master1 创建账号密码并授权
create user repl identified by *****
GRANT REPLICATION SLAVE ON *.* TO repl @ 172.28.8.187 IDENTIFIED BY *****
FLUSH PRIVILEGES;2.3 查看 Master 同步状态
master1
mysql show master status;
+------------------+----------+--------------+--------------------------+-------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+--------------------------+-------------------+
| mysql-bin.000001 | 154 | mydb | mysql,information_schema | |
+------------------+----------+--------------+--------------------------+-------------------+
1 row in set (0.00 sec)master2
mysql show master status;
+------------------+----------+--------------+--------------------------+-------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+--------------------------+-------------------+
| mysql-bin.000001 | 154 | mydb | mysql,information_schema | |
+------------------+----------+--------------+--------------------------+-------------------+
1 row in set (0.00 sec)设置 master1 从 master2 同步
mysql CHANGE MASTER TO MASTER_HOST= 172.28.8.188 ,MASTER_PORT=3306,MASTER_USER= repl ,MASTER_PASSWORD= b4l:GGtG3s0* ,MASTER_LOG_FILE= mysql-bin.000002 ,MASTER_LOG_POS=860;
mysql SHOW SLAVE STATUS\G
mysql START SLAVE;
mysql SHOW SLAVE STATUS\G设置 master2 从 master1 同步
mysql CHANGE MASTER TO MASTER_HOST= 172.28.8.187 ,MASTER_PORT=3306,MASTER_USER= repl ,MASTER_PASSWORD= 2S1*8pr+BzqH^8T` ,MASTER_LOG_FILE= mysql-bin.000003 ,MASTER_LOG_POS=1497;
mysql SHOW SLAVE STATUS\G
mysql START SLAVE;
mysql SHOW SLAVE STATUS\G如出现以下两项，则说明配置成功！
Slave_IO_Running: Yes
Slave_SQL_Running: Yes3. 双主同步测试
进入 master1 mysql 数据库
mysql create database crm;
Query OK, 1 row affected (0.00 sec)
mysql use crm;
Database changed
mysql create table employee(id int auto_increment,name varchar(10),primary key(id));
Query OK, 0 rows affected (0.00 sec)
mysql insert into employee(name) values( a
Query OK, 1 row affected (0.00 sec)
mysql insert into employee(name) values( b
Query OK, 1 row affected (0.00 sec)
mysql insert into employee(name) values( c
Query OK, 1 row affected (0.06 sec)
mysql select * from employee;
+----+------+
| id | name |
+----+------+
| 1 | a |
| 3 | b |
| 5 | c |
+----+------+
3 rows in set (0.00 sec)进入 master2，查看是否有 crm 这个数据库和 employee 表。
mysql show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| crm |
| mysql |
| performance_schema |
+--------------------+
4 rows in set (0.00 sec)
mysql use crm;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Database changed
mysql show tables;
+---------------+
| Tables_in_crm |
+---------------+
| employee |
+---------------+
1 row in set (0.00 sec)
mysql select * from employee;
+----+------+
| id | name |
+----+------+
| 1 | a |
| 3 | b |
| 5 | c |
+----+------+
3 rows in set (0.00 sec)
mysql insert into employee(name) values( d
Query OK, 1 row affected (0.00 sec)
mysql select * from employee;
+----+------+
| id | name |
+----+------+
| 1 | a |
| 3 | b |
| 5 | c |
| 7 | d |
+----+------+
4 rows in set (0.00 sec)在 master1 的中查看是否有刚刚在 master2 中插入的数据。
mysql select * from employee;
+----+------+
| id | name |
+----+------+
| 1 | a |
| 3 | b |
| 5 | c |
| 7 | d |
+----+------+
4 rows in set (0.00 sec)到此，关于“怎么安装 Mysql 双机热备”的学习就结束了，希望能够解决大家的疑惑。理论与实践的搭配能更好的帮助大家学习，快去试试吧！若想继续学习更多相关知识，请继续关注丸趣 TV 网站，丸趣 TV 小编会继续努力为大家带来更多实用的文章！
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