mysql 5.7 双主+主从配置

• mysql5.7安装及赋权

wget http://repo.mysql.com/mysql57-community-release-el7-8.noarch.rpm
rpm -ivh mysql57-community-release-el7-.noarch.rpm

rm -f mysql57-community-release-el7-.noarch.rpm

yum -y remove mysql-libs.x86_64 

yum install mysql-server -y
service mysqld start
mysql -p$(grep "password" /var/log/mysqld.log|awk '{print $NF}')

SET PASSWORD = PASSWORD('Asd123.com');
ALTER USER 'root'@'localhost' PASSWORD EXPIRE NEVER;
grant all privileges on *.* to root@"%" identified by "Asd123.com";
grant all privileges on *.* to root@"localhost" identified by "Asd123.com";
flush privileges;
quit

service mysqld restart

• 配置文件模板

[client]
default-character-set=utf8

[mysqld]
character-set-server = utf8
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
lower_case_table_names=1
explicit_defaults_for_timestamp=true
read_only=1

server_id = 241
sync_binlog=1
log_bin = mysql-bin
binlog-format = row
log-slave-updates = 1
auto_increment_increment = 2
auto_increment_offset = 2

symbolic-links=0

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

注意：serverid 必须不一样，auto_increment_offset 和auto_increment_increment 做双主需要配置，只做主从不需要。

• 同步配置

mysql -uroot -pAsd123.com

 GRANT REPLICATION SLAVE ON *.* TO 'repl'@'192.%' IDENTIFIED  BY 'Asd123.com';
 flush privileges;

change master to
       master_host = '192.168.1.240',
       master_user = 'repl',
       master_password = 'Asd123.com',
       master_log_file = 'mysql-bin.000005',
       master_log_pos = 154;

change master to
       master_host = '192.168.1.241',
       master_user = 'repl',
       master_password = 'Asd123.com',
       master_log_file = 'mysql-bin.000003',
       master_log_pos = 603;

show slave status\G