實驗環境 三臺虛擬機 一主兩從mysql
主: 192.168.200.111sql
從1: 192.168.200.112數據庫
從2: 192.168.200.113vim
[root@localhost ~]# iptables -F
[root@localhost ~]# systemctl stop firewalld
[root@localhost ~]# setenforce 0服務器
創建三臺服務器時間同步環境,在主服務器上安裝配置NTP時間同步服務器ide
[root@localhost ~]# yum -y install ntp測試
[root@localhost ~]# vim /etc/ntp.conf spa
末行添加rest
server 127.127.1.0日誌
fudge 127.127.1.0 startum 8
[root@localhost ~]# systemctl restart ntpd
在兩臺從服務器上同步時間
[root@localhost ~]# yum -y install ntpdate
[root@localhost ~]# ntpdate 192.168.200.111
15 Oct 12:02:12 ntpdate[10406]: adjust time server 192.168.200.111 offset 0.008413 sec
slave2服務器與slave1服務器相同
在全部的服務器上操做安裝mariadb和mariadb-server
[root@localhost ~]# yum -y install mariadb mariadb-server
配置MySQL Master主服務器
[root@localhost mysql]# vim /etc/my.cnf
[mysqld]
server-id=1 //三臺不要相同
log-bin=mysql-bin
log-slave-updates=true //手動添加,開啓從日誌
[root@localhost ~]# systemctl restart mariadb
給從服務器受權
[root@localhost ~]# mysql -uroot -p123456
MariaDB [(none)]> grant replication slave on *.* to 'root'@'192.168.200.%' identified by '123456';
Query OK, 0 rows affected (0.00 sec)
MariaDB [(none)]> flush privileges;
Query OK, 0 rows affected (0.00 sec)
MariaDB [(none)]> show master status;
+------------------+----------+--------------+------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000010 | 474 | | | //數據後面要用到
+------------------+----------+--------------+------------------+
1 row in set (0.00 sec)
備份以前主服務器有數據須要先傳給從服務器,沒有就忽略。
主:mysqldump -uroot -all-databases > /root/alldbacup.sql
scp傳給從服務器
從:mysql -uroot -p < /root/alldbacup.sql
配置從服務器
[root@localhost ~]# vim /etc/my.cnf
[mysqld]
server-id=2 //id號不能相同
relay-log=relay-log-bin //開啓中繼日誌
relay-log-index=slave-relay-bin.index
[root@localhost ~]# systemctl restart mariadb
[root@localhost ~]# mysql -uroot -p123456
MariaDB [(none)]> stop slave; //把本身從的角色功能先停掉
Query OK, 0 rows affected, 1 warning (0.01 sec)
MariaDB [(none)]> change master to -> master_host='192.168.200.111',-> master_user='root',-> master_password='123456',-> master_log_file='mysql-bin.000010',-> master_log_pos=474;
Query OK, 0 rows affected (0.01 sec)
MariaDB [(none)]> start slave;
Query OK, 0 rows affected (0.01 sec)
參數說明:
CHANGE MASTER TO
MASTER_HOST='master_host_name', //主服務器的IP地址
MASTER_USER='replication_user_name', //主服務器受權的用戶
MASTER_PASSWORD='replication_password', //主服務器受權的密碼
MASTER_LOG_FILE='recorded_log_file_name', //主服務器二進制日誌的文件名
MASTER_LOG_POS=recorded_log_position; //日誌文件的開始位置
MariaDB [(none)]> show slave status \G;
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.200.111
Master_User: root
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000010
Read_Master_Log_Pos: 474
Relay_Log_File: relay-log-bin.000002
Relay_Log_Pos: 529
Relay_Master_Log_File: mysql-bin.000010
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
........................................
經過查看slave狀態,確保Slave_IO_Running: Yes Slave_SQL_Running: Yes
slave2配置相同
測試:
在主服務器建立數據庫,在從服務器查看是否同步
主:
MariaDB [(none)]> create database db_test;
Query OK, 1 row affected (0.00 sec)
MariaDB [(none)]> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| db_test |
| mysql |
| performance_schema |
| test |
+--------------------+
5 rows in set (0.00 sec)
從:
MariaDB [(none)]> show databases;+--------------------+| Database |+--------------------+| information_schema || db_test || mysql || performance_schema || test |+--------------------+5 rows in set (0.00 sec)