Master开启log-bin二进制日志功能,并建立slave账号,同时将数据备份传送到Slave的备份文件
中,Master产生的新数据会导入到log-bin中,同时Master会开启lo线程,Slave也会开启lo线程以及
relay-bin中继日志功能,Slave中的lo线程与Master的lo线程连接使得Master监控Log-bin中的数据,
一旦数据有所变更则Slave将变更的数据复制到relary-bin中,Slave开启SQL将变更的数据导入到备
份文件中,此时Slave中的备份中有Master的老数据以及变更的数据,一旦Master出现问题,可以将
Slave的备份数据恢复到Master。
设备:
master:192.168.200.125
slave1:192.168.200.124
slave2:192.168.200.111
Master主操作:
关闭防火墙:
[root@localhost ~]# systemctl stop firewalld
[root@localhost ~]# iptables -F
[root@localhost ~]# setenforce 0
安装mariadbb:
[root@localhost ~]# yum install mariadb mariadb-server -y #此处安装了mariadb数据库系统
安装ntp时间同步软件:主要为了让主服务器和从服务器之间时间一致。那么从服务器中继日志和主的二进制日志数据一致
[root@localhost ~]# yum install ntp -y
[root@localhost ~]# vim /etc/ntp.conf
在末尾加入如下两行:主要让自己变成ntp的服务端使得从服务器能获取主服务器的时间
server 127.127.1.0 fudge 127.127.1.0 stratum 8
启动NTP服务:
[root@localhost ~]# systemctl start ntpd
[root@localhost ~]# systemctl enable ntpd
配置主配置文件开启二进制日志:
[root@localhost ~]# vim /etc/my.cnf
[mysqld]
server-id=1 #server的id号 log-bin=mysql-binlog #前缀 log-slave-updates=true #允许从对log_bin进行更新
重启服务器:
[root@localhost ~]# systemctl restart mariadb
[root@localhost ~]# netstat -anpt | grep 3306
tcp 0 0 0.0.0.0:3306 0.0.0.0:* LISTEN
创建Replication用户:
[root@localhost ~]# mysql -uroot -p123123
MariaDB [(none)]> grant replication slave on *.* to 'myslave'@'192.168.200.%' identified by '123123'; #允许192.168.200.网段的myslave连接数据库连接密码为123123
Query OK, 0 rows affected (0.00 sec)
MariaDB [(none)]> flush privileges;;
Query OK, 0 rows affected (0.00 sec)
ERROR: No query specified
MariaDB [(none)]> show master status; #获取masterDB的相关信息
+---------------------+----------+--------------+------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+---------------------+----------+--------------+------------------+
| mysql-binlog.000001 | 479 | | |
+---------------------+----------+--------------+------------------+
1 row in set (0.00 sec)
考虑问题有没有之前留下的老数据:备份master原有所有数据到两台slave上
[root@localhost ~]# mysqldump -uroot -p123123 --all-databases > /root/alldbbackup.sql
[root@localhost ~]# scp /root/alldbbackup.sql [email protected]:/root/
[root@localhost ~]# scp /root/alldbbackup.sql [email protected]:/root/
主服务器创建一个新的数据库用以给从数据库测试同步情况:
MariaDB [mysql]> create database liuxiang;
Query OK, 1 row affected (0.00 sec)
MariaDB [mysql]> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| liuxiang |
| mysql |
| performance_schema |
+--------------------+
4 rows in set (0.00 sec)
Slave1和Slave2操作:两台从服务器操作一致
关闭防火墙:
[root@localhost ~]# systemctl stop firewalld
[root@localhost ~]# iptables -F
[root@localhost ~]# setenforce 0
安装mariadbb:
[root@localhost ~]# yum install mariadb mariadb-server -y
安装ntpdate:
[root@localhost ~]# yum install ntpdate -y
在两个salve节点上配置与Master进行时间同步:
[root@localhost ~]# ntpdate 192.168.200.125
15 Oct 14:15:10 ntpdate[11932]: adjust time server 192.168.200.125 offset -0.018919 sec
做周期计划:
[root@localhost ~]# crontab -l
* */5 * * * /usr/sbin/ntpdate pool.ntp.org > /dev/null 2>&1 #pool.ntp.org是互联网上的时间同步器
导入master原数据脚本到mysql库中:
[root@localhost ~]# mysql -uroot -p123123 < /root/alldbbackup.sql
测试连接主数据库运行测试:连接成功配置正确
[root@localhost ~]# mysql -u myslave -p123123 -h 192.168.200.125
修改配置文件开启中继日志:
[root@localhost ~]# vim /etc/my.cnf
[mysqld] server-id=2 #slave2从服务器此处改为3 relay-log=relay-log-bin #前缀 relay-log-index=slave-relay-bin.index #索引文件
重启mariadb服务:
[root@localhost ~]# systemctl restart mariadb
启动从库,运行从库数据同步:
[root@localhost ~]# mysql -uroot -p12
MariaDB [(none)]> stop slave; #停掉自己从的数据库角色
Query OK, 0 rows affected, 1 warning (0.09 sec)
MariaDB [(none)]> CHANGE MASTER TO
-> MASTER_HOST='192.168.200.125',
-> MASTER_USER='myslave',
-> MASTER_PASSWORD='123123',
-> MASTER_LOG_FILE='mysql-binlog.000001', #masterDB的相关信息
-> MASTER_LOG_POS=721; #masterDB的相关信息
Query OK, 0 rows affected (0.10 sec)
MariaDB [(none)]> start slave; #开启自己从的数据库角色
Query OK, 0 rows affected (0.00 sec)
MariaDB [(none)]> show slave status\G;
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.200.125
Master_User: myslave
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-binlog.000001
Read_Master_Log_Pos: 721
Relay_Log_File: relay-log-bin.000002
Relay_Log_Pos: 532
Relay_Master_Log_File: mysql-binlog.000001
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:
Last_Errno: 0
Last_Error:
Skip_Counter: 0
Exec_Master_Log_Pos: 721
Relay_Log_Space: 824
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 #报错编号
Last_IO_Error: #报错位置
Last_SQL_Errno: 0
Last_SQL_Error:
Replicate_Ignore_Server_Ids:
Master_Server_Id: 1
1 row in set (0.00 sec)
ERROR: No query specified
从测试与主数据库同步情况:
MariaDB [(none)]> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| auth |
| client |
| liuxiang |
| mydb |
| mysql |
| performance_schema |
| shuifei |
| test |
| var |
| yg |
+--------------------+
11 rows in set (0.00 sec)