CentOS8.2安裝mysql8.0雙主

 systemctl stop firewalld
 systemctl disable firewalld
 setenforce 0
 sed -i 's/^SELINUX=.*/SELINUX=disabled/' /etc/selinux/config

 timedatectl set-timezone Asia/Shanghai

 安裝如下四個包即可：
mysql-community-client-8.0.20-1.el8.x86_64.rpm
mysql-community-common-8.0.20-1.el8.x86_64.rpm
mysql-community-libs-8.0.20-1.el8.x86_64.rpm
mysql-community-server-8.0.20-1.el8.x86_64.rpm

[mysqld]
server-id=54
port=36604
character-set-server=utf8mb4
default-time_zone='+8:00'
lower_case_table_names=1

max_connections=3000
max_connect_errors=100000

default_authentication_plugin=mysql_native_password
datadir=/opt/mysql/data
socket=/opt/mysql/mysql.sock

log-error=/opt/mysql/logs/mysqld.log
pid-file=/opt/mysql/mysqld.pid

binlog_format=ROW
log_bin=/opt/mysql/data/mysql-bin-54.log
binlog_expire_logs_seconds=2592000

long_query_time=1
slow_query_log = 1
slow_query_log_file=/opt/mysql/logs/slow.log

[client]
port=36604
default-character-set=utf8mb4
socket=/opt/mysql/mysql.sock

[mysql]
no-auto-rehash
default-character-set=utf8mb4

第二臺配置：

[mysqld]
server-id=56
port=36604
character-set-server=utf8mb4
default-time_zone='+8:00'
lower_case_table_names=1

max_connections=3000
max_connect_errors=100000

default_authentication_plugin=mysql_native_password
datadir=/opt/mysql/data
socket=/opt/mysql/mysql.sock

log-error=/opt/mysql/logs/mysqld.log
pid-file=/opt/mysql/mysqld.pid

binlog_format=ROW
log_bin=/opt/mysql/data/mysql-bin-56.log
binlog_expire_logs_seconds=2592000

long_query_time=1
slow_query_log = 1
slow_query_log_file=/opt/mysql/logs/slow.log

[client]
port=36604
default-character-set=utf8mb4
socket=/opt/mysql/mysql.sock

[mysql]
no-auto-rehash
default-character-set=utf8mb4

mkdir /opt/mysql/logs
chown mysql.mysql /opt/mysql/logs
touch /opt/mysql/logs/mysqld.log
chown mysql.mysql /opt/mysql/logs/mysqld.log

使用logs/mysqld.log中初始化的臨時密碼登錄mysql -uroot -p，修改本地root密碼，
alter user'root'@'localhost' IDENTIFIED BY 'PWpw!@12'; 

//創建複製用戶
create user 'repl'@'10.110.2.%' identified by 'reple_password';
grant replication slave on *.* to 'repl'@'10.110.2.%';

//在第一臺查看binlog狀態
show master status;

修改第二臺備庫：
mysql> change master to
    -> master_host='10.110.2.71',
    -> master_port=36604,
    -> master_user='repl',
    -> master_password='reple_password',
    -> master_log_file='mysql-bin-71.000002',
    -> master_log_pos=979 ;
mysql>start slave;

show slave status\G; //查看從庫狀態

同樣在第二臺查看binlog狀態，修改第一臺從庫配置：
show master status;
start slave;
show slave status\G;

mysql遠程訪問設置：
CREATE USER 'root'@'10.xx.xx.%' IDENTIFIED BY 'newpasswd';
ALTER USER 'root'@'10.xx.xx.%' IDENTIFIED WITH mysql_native_password BY 'newpasswd';
GRANT ALL PRIVILEGES ON *.* TO 'root'@'10.xx.xx.%' WITH GRANT OPTION;
flush privileges;

status //查看版本