ySQL 서버 설치

yum install -y mariadb-server

mysql_secure_installation   #MySql ， 
     root 
     
     
     
     root 
     test 
     
     PATH 

systemctl start mariadb

마스터 서버 기반 구축

hostnamectl set-hostname mysql-master
exec bash

MariaDB [(none)]> create database shuaiguoxia ;
Query OK, 1 row affected (0.00 sec)

MariaDB [(none)]> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| shuaiguoxia        |
| test               |
+--------------------+
5 rows in set (0.00 sec)

use shuaiguoxia;
create table blog (name varchar(20),age int,sex varchar(10));

MariaDB [shuaiguoxia]> desc blog;
+-------+-------------+------+-----+---------+-------+
| Field | Type        | Null | Key | Default | Extra |
+-------+-------------+------+-----+---------+-------+
| name  | varchar(20) | YES  |     | NULL    |       |
| age   | int(11)     | YES  |     | NULL    |       |
| sex   | varchar(10) | YES  |     | NULL    |       |
+-------+-------------+------+-----+---------+-------+

insert into blog (name,age,sex) values ("guo",27,"nan");
insert into blog (name,age,sex) values ("wu",33,"nan");
insert into blog (name,age,sex) values ("cai",31,"nv");
insert into blog (name,age,sex) values ("li",19,"nan");
insert into blog (name,age,sex) values ("zhao",18,"nan");
insert into blog (name,age,sex) values ("qian",25,"nv");

주 서버 설정

vim /etc/my.cnf
[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
server-id=10
log-bin=mysql-bin
relay-log=mysql-relay-bin
replicate-wild-ignore-table=mysq.%

mysql -u root -p

use shuaiguoxia;

MariaDB [shuaiguoxia]> lock tables blog read;
Query OK, 0 rows affected (0.00 sec)

mysqldump -u root -p -h 127.0.0.1 --database shuaiguoxia  > /bak.sql
Enter password: 
#  --dabatase 

scp /bak.sql 192.168.1.175:/

mysql -u root -p < /bak.sql

grant replication slave on *.* to 'slave_user'@'192.168.1.%' identified  by '1234'

노드에서 구성

hostnamectl set-hostname slave-master
exec bash

[root@mysql-slave ~]# cat /etc/my.cnf
[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
server-id=21
log-bin=mysql-bin
replicate-wild-ignore-table=mysql.%

#  master ， 
MariaDB [(none)]> show master status;
+------------------+----------+--------------+------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000003 |     2900 |              |                  |
+------------------+----------+--------------+------------------+

#  ， 
mysql -u root -p < /bak.sql

#  master_log_file master_log_pos 

MariaDB [(none)]> change master to \
master_host='192.168.1.46',
master_user='slave_user',
master_password='1234',
master_log_file='mysql-bin.000003',
master_log_pos=2900;

MariaDB [(none)]> start slave;
Query OK, 0 rows affected (0.01 sec)

#  Slave_IO_Running  Slave_SQL_Running yes

MariaDB [(none)]> show slave status\G;
*************************** 1. row ***************************
              Slave_IO_State: Waiting for master to send event
                 Master_Host: 192.168.1.46
                 Master_User: slave_user
                 Master_Port: 3306
               Connect_Retry: 60
             Master_Log_File: mysql-bin.000003
         Read_Master_Log_Pos: 3057
              Relay_Log_File: mariadb-relay-bin.000002
               Relay_Log_Pos: 686
       Relay_Master_Log_File: mysql-bin.000003
            Slave_IO_Running: Yes
           Slave_SQL_Running: Yes
             Replicate_Do_DB: 
         Replicate_Ignore_DB: 
          Replicate_Do_Table: 
      Replicate_Ignore_Table: 
     Replicate_Wild_Do_Table: 
 Replicate_Wild_Ignore_Table: mysql.%
                  Last_Errno: 0
                  Last_Error: 
                Skip_Counter: 0
         Exec_Master_Log_Pos: 3057
             Relay_Log_Space: 982
             Until_Condition: None
              Until_Log_File: 
               Until_Log_Pos: 0
          Master_SSL_Allowed: No
          Master_SSL_CA_File: 
          Master_SSL_CA_Path: 
             Master_SSL_Cert: 
           Master_SSL_Cipher: 
              Master_SSL_Key: 
       Seconds_Behind_Master: 0
Master_SSL_Verify_Server_Cert: No
               Last_IO_Errno: 0
               Last_IO_Error: 
              Last_SQL_Errno: 0
              Last_SQL_Error: 
 Replicate_Ignore_Server_Ids: 
            Master_Server_Id: 10
1 row in set (0.00 sec)

주종 실패의 흔한 원인

노드에서 데이터 가져오기 실패

mysqldump -u root -p -h 127.0.0.1 --database shuaiguoxia  > /bak.sql
Enter password: 
#  --dabatase 

mysql -u root -p < /bak.sql