在centos7上配置mariadb主从数据库 2019-05-11

准备两台centos7:node1、node2

关闭防火墙:


[root@node1~]# systemctl stop firewalld

[root@node1~]# iptables -F

[root@node1 ~]# iptables -X

[root@node1 ~]# iptables -Z

[root@node1 ~]# /usr/sbin/iptables-save

[root@node1 ~]# setenforce 0

配置yum源:(这里用的是CentOS-7-x86_64-DVD-1511.iso)

[root@node1 ~]# cat /etc/yum.repos.d/centos.repo

[centos]

name=centos

baseurl=ftp://192.168.100.10/centos

gpgcheck=0

enabled=1

安装数据库:

[root@node1 ~]# yum -y install mariadb-server

修改配置文件:

node1:

[root@node1 ~]# cat /etc/my.cnf

在[mysqld]下添加:

server_id=1

log-bin=mysql-bin

node2:

[root@node2 ~]# cat /etc/my.cnf

在[mysqld]下添加:

server_id=2

启动数据库:

node1:

[root@node1 ~]# systemctl start mariadb

使用mysql命令直接登录

查看主节点二进制日志文件名称和位置:

MariaDB [(none)]> show master status;

+------------------+----------+--------------+------------------+

| File            | Position | Binlog_Do_DB | Binlog_Ignore_DB |

+------------------+----------+--------------+------------------+

| mysql-bin.000004 |      336 |              |                  |

+------------------+----------+--------------+------------------+

1 row in set (0.00 sec)

创建在从节点登录的用户:

MariaDB [(none)]> grant replication slave on *.* to "user"@"192.168.200.107" identified by "000000";

Query OK, 0 rows affected (0.00 sec)(192.168.20.107为从节点IP)

node2:

[root@node2~]# systemctl start mariadb

连接主库:

MariaDB [(none)]> change master to master_host='192.168.200.106',master_user='user',master_password='000000',master_port=3306,master_log_file='mysql-bin.000004',master_log_pos=336,master_connect_retry=10;

启动从节点服务:

MariaDB [(none)]> slave start;

Query OK, 0 rows affected, 1 warning (0.00 sec)

查看状态:

MariaDB [(none)]> show slave status\G;

*************************** 1. row ***************************

              Slave_IO_State: Waiting for master to send event

                  Master_Host: 192.168.200.106

                  Master_User: user

                  Master_Port: 3306

                Connect_Retry: 10

              Master_Log_File: mysql-bin.000004

          Read_Master_Log_Pos: 492

              Relay_Log_File: mariadb-relay-bin.000003

                Relay_Log_Pos: 776

        Relay_Master_Log_File: mysql-bin.000004

            Slave_IO_Running: Yes

            Slave_SQL_Running: Yes

(成功后Slave_IO_Running: Yes、Slave_SQL_Running: Yes这两项会是yes)

之后在node1上对数据库的编辑会同步到从数据库node2。

附:

master_host='主库地址'

master_user='',master_password=''用来登录主库的账号

master_port=主库端口号

master_log_file='主库二进制日志文件'

master_log_pos=日志位置

master_connect_retry=连接重试次数
    原文作者:黄昏水自流
    原文地址: https://www.jianshu.com/p/e68e95affcb6
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