mysql主从-优快云博客

本文链接：https://blog.youkuaiyun.com/qq_39122260/article/details/123043427

安装

#添加mysql系统用户
groupadd mysql
useradd -r -g mysql mysql
tar -xvf mysql-5.7.22-linux-glibc2.12-x86_64.tar.gz -C /usr/local/
cd /usr/local/
mv mysql-5.7.22-linux-glibc2.12-x86_64/ mysql-5.7.22

编辑配置文件

cd /usr/local/mysql-5.7.22/
vim /etc/my.cnf
[mysqld]
socket=/tmp/mysql.sock
# 设置mysql的安装目录
basedir=/usr/local/mysql-5.7.22
# 设置mysql数据库的数据的存放目录 
datadir=/usr/local/mysql-5.7.22/data
# 允许最大连接数
max_connections=5000
# 服务端使用的字符集默认为8比特编码的latin1字符集
character-set-server=utf8mb4
collation-server=utf8mb4_unicode_ci
init_connect='SET collation_connection = utf8mb4_unicode_ci'
lower_case_table_names=1
# 创建新表时将使用的默认存储引擎
default-storage-engine=INNODB
#max_allowed_packet=256M
default-authentication-plugin=mysql_native_password
symbolic-links=0
default-time-zone='+08:00'
[mysqld_safe]
log-error=/var/log/mysql-5.7.22/mysql.log
pid-file=/var/run/mysql-5.7.22/mysql.pid
!includedir /etc/my.cnf.d

创建对应文件目录

mkdir /usr/local/mysql-5.7.22/data
mkdir /var/log/mysql-5.7.22
mkdir /var/run/mysql-5.7.22
touch /var/log/mysql-5.7.22/mysql.log
chown -R mysql:mysql /usr/local/mysql-5.7.22/data/
chown -R mysql:mysql /var/log/mysql-5.7.22/
chown -R mysql:mysql /var/run/mysql-5.7.22/

初始化

./bin/mysqld --initialize --user=mysql --lower-case-table-names=1  					--basedir=/usr/local/mysql-5.7.22/ --datadir=/usr/local/mysql-5.7.22/data/

启动

#加入linux服务
cp support-files/mysql.server /etc/init.d/mysqld
chkconfig add mysqld
service mysqld start

或者
vim /etc/systemd/system/mysqld.service
[Unit]
Description=MySQL Server
Documentation=man:mysqld(8)
Documentation=http://dev.mysql.com/doc/refman/en/using-systemd.html
After=network.target
After=syslog.target
[Install]
WantedBy=multi-user.target
[Service]
User=mysql
Group=mysql
ExecStart=/data/mysql-5.7.22/bin/mysqld --defaults-file=/etc/my.cnf
LimitNOFILE = 5000


systemctl daemon-reload
systemctl  start mysqld
systemctl  enable mysqld

添加mysql命令

vim /root/.bash_profile
PATH=$PATH:$HOME/bin:/usr/local/mysql-5.7.22/bin
source  /root/.bash_profile
ln -s /var/lib/mysql/mysql.sock /tmp/

初始化密码

mysql -uroot -p'O)PiBLw0=af#'
alter user root@'localhost' identified by 'mtxx87668438QAZ123!@#';
GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY '123qqq...A' 				WITH GRANT OPTION;

一主一从
主

修改配置文件

vim /etc/my.cnf
server-id=15
#启用半同步复制
plugin-load="rpl_semi_sync_master=semisync_master.so;rpl_semi_sync_slave=semisync_slave.so"
rpl-semi-sync-master-enabled = 1
rpl-semi-sync-slave-enabled = 1
#开启 Binlog 并写明存放日志的位置
log_bin=/usr/local/mysql-5.7.22/binlog/master1
#日志保留时间
expire_logs_days=10
#日志模式为混合模式
binlog_format=MIXED


mkdir -p /usr/local/mysql-5.7.22/binlog
chown -R mysql:mysql  /usr/local/mysql-5.7.22/binlog
service mysqld restart

创建：同步数据连接用户、管理主机连接数据库的用户

grant replication slave on *.* to repluser@'%' identified by '123qqq...A';
flush privileges;

查看日志信息:
```
show master status; 
```

从

修改配置文件

vim /etc/my.cnf
server-id=16
#启用半同步复制
plugin-load="rpl_semi_sync_master=semisync_master.so;rpl_semi_sync_slave=semisync_slave.so"
rpl-semi-sync-master-enabled = 1
rpl-semi-sync-slave-enabled = 1
#开启 Binlog 并写明存放日志的位置
log_bin=/usr/local/mysql-5.7.22/binlog/master1
#日志保留时间
expire_logs_days=10
#日志模式为混合模式
binlog_format=MIXED



mkdir -p /usr/local/mysql-5.7.22/binlog
chown -R mysql:mysql /usr/local/mysql-5.7.22/binlog
service mysqld restart

创建：同步数据连接用户、管理主机连接数据库的用户

grant replication slave on *.* to repluser@'%' identified by '123qqq...A';
flush privileges;

指定主服务器信息:

change master to
master_host="10.129.18.160",
master_user="repluser",
master_password="mtxx87668438QAZ123!@#",
master_log_file="mysql-bin.000269",
master_log_pos=717710130;