NFS共享web资源，DNS轮询实现Web负载均衡的小实验

32433221

一、实验规划

二、实现步骤：
        www1主机：
        1、安装LAMP+NFS_DNS:

1	# yum install bind httpd mysql-server php php-mysql nfs-utlis rpcbind

        2、设置httpd：
        3、设置nfs：

1 2	echo "/var/www/html10.1.24.19/16(rw)" >> /etc/exports service start rpcbind && service start nfs

        3、设置mysql：

1 2 3 4 5 6 7 8

mysql> GRANT ALL ON *.* TO 'hill'@'%' IDENTIFIED BY '123456'; Query OK, 0 rows affected (0.00 sec) mysql> GRANT ALL ON *.* TO 'hill'@'localhost' IDENTIFIED BY '123456'; Query OK, 0 rows affected (0.00 sec) mysql> GRANT ALL ON *.* TO 'hill'@'127.0.0.1' IDENTIFIED BY '123456'; Query OK, 0 rows affected (0.00 sec) mysql> FLUSH PRIVILEGES; Query OK, 0 rows affected (0.00 sec)

        4、配置DNS

        添加域

1 2 3 4 5 6 7

[iyunv@localhost named]# tail -14 /etc/named.conf zone "hillboy.com" IN { type master; file "hillboy.zone"; }; include "/etc/named.rfc1912.zones"; include "/etc/named.root.key";

        添加RR：

1 2 3 4 5 6 7 8 9 10 11 12 13

[iyunv@localhost named]# cat /var/named/hillboy.zone $TTL 86400 @INSOAns.hillboy.com.admin.hillboy.com. ( 1015 1H 30M 1W 1D ) @INNSns.hillboy.com. nsINA10.1.24.18 wwwINA10.1.24.18 wwwINA10.1.24.19

        WWW1已经配置完成，下面配置WWW2
        1、搭建LAMP环境，修改httpd的根目录为/var/www/html,并且添加支持index.php
        2、挂载NFS文件系统

1 2 3

[iyunv@localhost html]# mount -t nfs 10.1.24.18:/var/www/html /var/www/html/ [iyunv@localhost html]# ls index.php  pma

        客户机测试：
        1、修改DNS服务器为10.1.24.18

1 2 3

[23:32 root@centos6.8~]# cat /etc/resolv.conf ; generated by /sbin/dhclient-script nameserver 10.1.24.18

        2、访问测试，已经能正常轮询

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

[23:32 root@centos6.8~]# ping www.hillboy.com PING www.hillboy.com (10.1.24.19) 56(84) bytes of data. 64 bytes from 10.1.24.19: icmp_seq=1 ttl=64 time=2.90 ms 64 bytes from 10.1.24.19: icmp_seq=2 ttl=64 time=0.869 ms 64 bytes from 10.1.24.19: icmp_seq=3 ttl=64 time=0.945 ms 64 bytes from 10.1.24.19: icmp_seq=4 ttl=64 time=0.953 ms ^C --- www.hillboy.com ping statistics --- 4 packets transmitted, 4 received, 0% packet loss, time 12032ms rtt min/avg/max/mdev = 0.869/1.416/2.900/0.858 ms [23:32 root@centos6.8~]# ping www.hillboy.com PING www.hillboy.com (10.1.24.18) 56(84) bytes of data. 64 bytes from 10.1.24.18: icmp_seq=1 ttl=64 time=1.27 ms 64 bytes from 10.1.24.18: icmp_seq=2 ttl=64 time=0.492 ms ^C --- www.hillboy.com ping statistics --- 2 packets transmitted, 2 received, 0% packet loss, time 6064ms rtt min/avg/max/mdev = 0.492/0.883/1.275/0.392 ms

        3、测试成功

1 2 3 4 5 6

[23:41 root@centos6.8~]# mtr www.hillboy.com -r HOST: centos6.8                   Loss%   Snt   Last   Avg  Best  Wrst StDev   1. 10.1.24.18                    0.0%    10    0.6   0.5   0.5   0.6   0.0 [23:44 root@centos6.8~]# mtr www.hillboy.com -r HOST: centos6.8                   Loss%   Snt   Last   Avg  Best  Wrst StDev   1. 10.1.24.19                    0.0%    10    1.0   1.0   0.9   1.0   0.0

        这里只用了两台机器实验，还可以规划mysql为一台机器实现共享，web后端资源实现共享，DNS单独一台机器。