Lvs+keepalived+mysql(主从复制)

1、准备环境

操作系统：centos 6.5

2台机器主机名为node53、node54

	Mysql	Lvs	keepalived
node2	Y	Y	Y
node3	Y	Y	Y

2、安装mysql（配置主主复制）

服务器名称	ip	vip
node2	192.168.0.12	192.168.0.200
node3	192.168.0.13	192.168.0.200

2.1、安装数据库

yum install -y mysql

2.2、关闭防火墙

service iptables stop

chkconfig iptables off

2.3、修改root用户名/访问权限

use mysql
delete from user where user='';
grant replication slave on *.* to 'root'@'%' identified by '123456';

2.4、修改/etc/my.cnf

在node2机器上配置如下

[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
user=mysql
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
 
log-bin=mysql-bin
server-id=1
#需要记录二进制日志的数据库，如果有多个库，写多个binlog-do-db，用逗号隔开，测试时发现不能同步？有空在研究
binlog-do-db=amdb
binlog-do-db=hivedb
binlog-do-db=ooziedb
#不需要记录日志的数据库
binlog-ignore-db=mysql
#需要同步的数据库
replicate-do-db=amdb
replicate-do-db=hivedb
replicate-do-db=ooziedb
#不需要同步的库
replicate-ignore-db=mysql,information_schema
#默认值3600s
slave-net-timeout=60
 
#保证slave挂在任何一台master上都会接收到另一个master的写入信息
log-slave-updates
sync_binlog=1
slave-skip-errors=all
auto_increment_offset=1
auto_increment_increment=2
 
[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid

在node3机器上配置如下

[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
user=mysql
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
 
log-bin=mysql-bin
#设置不同的id
server-id=2
#需要记录二进制日志的数据库，如果有多个库，写多个binlog-do-db，用逗号隔开，测试时发现不能同步？有空在研究
binlog-do-db=amdb
binlog-do-db=hivedb
binlog-do-db=ooziedb
#不需要记录日志的数据库
binlog-ignore-db=mysql
#需要同步的数据库
replicate-do-db=amdb
replicate-do-db=hivedb
replicate-do-db=ooziedb
#不需要同步的库
replicate-ignore-db=mysql,information_schema
#默认值3600s
slave-net-timeout=60
 
#保证slave挂在任何一台master上都会接收到另一个master的写入信息
log-slave-updates
sync_binlog=1
slave-skip-errors=all
auto_increment_offset=1
auto_increment_increment=2
 
[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
 
2.5、重启mysql服务

service mysqld restart

2.6、分别在node2、node3上执行

mysql> flush tables with read lock;#防止进入新的数据
Query OK, 0 rows affected (0.00 sec)
mysql> show master status\G;
*************************** 1. row ***************************
            File: mysql-bin.000007
        Position: 438
    Binlog_Do_DB: db_rocky
Binlog_Ignore_DB: mysql
1 row in set (0.00 sec)
 
在node3
 
mysql> flush tables with read lock;
Query OK, 0 rows affected (0.00 sec)
mysql> show master status\G;
*************************** 1. row ***************************
            File: mysql-bin.000008
        Position: 107
    Binlog_Do_DB: db_rocky
Binlog_Ignore_DB: mysql
1 row in set (0.01 sec)
 
2.7、在node2、node3指定同步位置
在node53
mysql> change master to master_host='10.211.55.54',master_user='root',master_password='123456',master_log_file='mysql-bin.000008',master_log_pos=107;
Query OK, 0 rows affected (0.05 sec)
 
在node3
 
mysql> change master to master_host='10.211.55.53',master_user='root',master_password='123456',
    -> master_log_file='mysql-bin.000007',master_log_pos=438;
Query OK, 0 rows affected (0.15 sec)
 
注：master_log_file，master_log_pos由上面主服务器查出的状态值中确定
 
2.8、解锁表
 
mysql> unlock tables;
mysql> start slave;
 
2.9、分别在2台机器查看状态
show slave status\G;
如果显示如下，则正常
  Slave_IO_Running: Yes
  Slave_SQL_Running: Yes
3、Lvs配置
3.1 安装lvs
yum install ipvsadm
3.2 编写启动脚本
 
vim /etc/init.d/realserver.sh
#!/bin/bash
#description: Config realserver lo and apply noarp
  
SNS_VIP=10.211.55.200
/etc/rc.d/init.d/functions
case "$1" in
  
start)
      ifconfig eth0:1 $SNS_VIP/24
      /sbin/route add -host $SNS_VIP dev eth0:1
      echo "vip Start OK"
      ifconfig lo:0 $SNS_VIP netmask 255.255.255.255 broadcast $SNS_VIP
      /sbin/route add -host $SNS_VIP dev lo:0
      echo "1" >/proc/sys/net/ipv4/conf/lo/arp_ignore
      echo "2" >/proc/sys/net/ipv4/conf/lo/arp_announce
      echo "1" >/proc/sys/net/ipv4/conf/all/arp_ignore
      echo "2" >/proc/sys/net/ipv4/conf/all/arp_announce
      sysctl -p >/dev/null 2>&1
      echo "RealServer Start OK"
      ;;
  
stop)
      ifconfig eth0:1 down
      route del $SNS_VIP >/dev/null 2>&1
      echo "vip Stoped"
      ifconfig lo:0 down
      route del $SNS_VIP >/dev/null 2>&1
      echo "0" >/proc/sys/net/ipv4/conf/lo/arp_ignore
      echo "0" >/proc/sys/net/ipv4/conf/lo/arp_announce
      echo "0" >/proc/sys/net/ipv4/conf/all/arp_ignore
      echo "0" >/proc/sys/net/ipv4/conf/all/arp_announce
      echo "RealServer Stoped"
      ;;
  
*)
  
      echo "Usage: $0 {start|stop}"
      exit 1
esac
exit 0
 
配置开机启动
 
 echo "/etc/init.d/realserver.sh start" >> /etc/rc.d/rc.local

4、配置keepalived

4.1、安装keepalived

yum install keepalived

4.2、配置keepalived.conf

vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
  
        notification_email {
             yangyufans@qq.com
        }
        notification_email_from yangyufans@qq.com
        smtp_server smtp.qq.com
        smtp_connect_timeout 30
        router_id LVS1
}
  
vrrp_sync_group test {
        group {
                loadbalance
        }
}
  
vrrp_instance loadbalance {
        state MASTER
        lvs_sync_daemon_inteface eth0
        virtual_router_id 51
        priority 150
        advert_int 1
  
        authentication {
                auth_type PASS
                auth_pass 1111
        }
  
        virtual_ipaddress {
                10.211.55.200 dev eth0 label eth0:1
        }
}
virtual_server 10.211.55.200 3306 {
        delay_loop 6
        lb_algo rr
        lb_kind DR
        persistence_timeout 20
        protocol TCP
        sorry_server 10.211.55.54 3306
        real_server 10.211.55.53 3306 {
                weight 3
                TCP_CHECK {
                        connect_timeout 3
                        nb_get_retry 3
                        delay_before_retry 3
                        connect_port 3306
                }
        }
}