LVS小试
1.LVS/NAT原理：
Java代码
[*]客户端—>LVS外网IP（VIP）—>RS服务器（处理请求后通过网关返回结果）—>LVS的LB地址—>客户端
配置LVS/NAT模式时外网IP不要和LoadBalance（LB）的IP同一网段（使用VMWare时两个网卡不要设置同一网段，可以一个是NAT一个是HOST）
Java代码
[*]LVS外网IP：192.168.142.131
[*]LVS_LB的IP：192.168.254.128
[*]RS_1：192.168.254.129 GW 192.168.254.128
[*]RS_2：192.168.254.130 GW 192.168.254.128
配置LVS：
Java代码
[*]iptables -F
[*]echo "1">/proc/sys/net/ipv4/ip_forward
[*]ipvsadm -C
[*]ipvsadm -A -t 192.168.142.131:80 -s rr
[*]ipvsadm -a -t 192.168.142.131:80 -r 192.168.254.129 -m -w 1
[*]ipvsadm -a -t 192.168.142.131:80 -r 192.168.254.130 -m -w 1
LVS的网卡信息大约如下：
Java代码
[*]eth0 Link encap:EthernetHWaddr 00:0C:29:76:38:6B
[*] inet addr:192.168.142.131Bcast:192.168.142.255Mask:255.255.255.0
[*] ......
[*]
[*]eth1 Link encap:EthernetHWaddr 00:0C:29:76:38:75
[*] inet addr:192.168.254.128Bcast:192.168.254.255Mask:255.255.255.0
[*] ......
配置RS，其实RS的配置就只需要设置网关：
RS_1：
Java代码
[*]vi /etc/sysconfig/network-scripts/ifcfg-eth0
[*] DEVICE=eth0
[*] BOOTPROTO=static
[*] ONBOOT=yes
[*] HWADDR=00:0c:29:3d:fe:c5
[*] IPADDR=192.168.254.129
[*] NETMASK=255.255.255.0
[*] GATEWAY=192.168.254.128
[*]service network restart
[*]cd /var/www/html/
[*]echo "129">index.html
[*]apachectl start
[*]iptables -F
RS_2：
Java代码
[*]vi /etc/sysconfig/network-scripts/ifcfg-eth0
[*] DEVICE=eth0
[*] BOOTPROTO=static
[*] ONBOOT=yes
[*] HWADDR=00:0c:29:3d:fe:c5
[*] IPADDR=192.168.254.130
[*] NETMASK=255.255.255.0
[*] GATEWAY=192.168.254.128
[*]service network restart
[*]cd /var/www/html/
[*]echo "130">index.html
[*]apachectl start
[*]iptables -F
2.LVS/DR
原理：
Java代码
[*]客户端—>LVS的VIP—>RS服务器（处理请求后直接返回结果给客户端）—>客户端
LVS端的网卡需要有一个IP地址段与RS同一网段
Java代码
[*]LVS的IP：192.168.254.128
[*]LVS的VIP：192.168.254.100
[*]RS_1的IP：192.168.254.129
[*]RS_1的VIP（lo:0）：192.168.254.100
[*]RS_2的IP：192.168.254.130
[*]RS_2的VIP（lo:0）：192.168.254.100
配置LVS：
Java代码
[*]vi /etc/sysctl.conf
[*] # Controls IP packet forwarding
[*] net.ipv4.ip_forward = 1
[*] net.ipv4.conf.all.send_redirects = 1
[*] net.ipv4.conf.default.send_redirects = 1
[*] net.ipv4.conf.eth1.send_redirects = 1
[*]sysctl -p
[*]ifconfig eth1:0 192.168.254.100 netmask 255.255.255.255 broadcast 192.168.254.100 up
[*]route add -host 192.168.254.100 dev eth1:0
[*]ipvsadm -C
[*]ipvsadm -A -t 192.168.254.100:80 -s rr
[*]ipvsadm -a -t 192.168.254.100:80 -r 192.168.254.129 -g -w 1
[*]ipvsadm -a -t 192.168.254.100:80 -r 192.168.254.130 -g -w 1
[*]iptables -F
配置RS_1：
Java代码
[*] vi /etc/sysctl.conf
[*] # Controls IP packet forwarding
[*] net.ipv4.ip_forward = 0
[*] net.ipv4.conf.lo.arp_ignore = 1
[*] net.ipv4.conf.lo.arp_announce = 2
[*] net.ipv4.conf.all.arp_ignore = 1
[*] net.ipv4.conf.all.arp_announce = 2
[*]sysctl -p
[*]ifconfig lo:0 192.168.254.100 netmask 255.255.255.255 broadcast 192.168.254.100 up
[*]route add -host 192.168.254.100 dev lo:0
[*]cd /var/www/html/
[*]echo "129">index.html
[*]apachectl start
[*] iptables -F
配置RS_2：
Java代码
[*]vi /etc/sysctl.conf
[*] # Controls IP packet forwarding
[*] net.ipv4.ip_forward = 0
[*] net.ipv4.conf.lo.arp_ignore = 1
[*] net.ipv4.conf.lo.arp_announce = 2
[*] net.ipv4.conf.all.arp_ignore = 1
[*] net.ipv4.conf.all.arp_announce = 2
[*]sysctl -p
[*]ifconfig lo:0 192.168.254.100 netmask 255.255.255.255 broadcast 192.168.254.100 up
[*]route add -host 192.168.254.100 dev lo:0
[*]cd /var/www/html/
[*]echo "130">index.html
[*]apachectl start
[*]iptables -F
3.LVS/TUN
原理：
Java代码
[*]客户端—>LVS的VIP（通过IP Tunneling）—>RS服务器（处理请求后直接返回结果给客户端）—>客户端
RS服务器需要与外网直接通信
Java代码
[*]LVS的IP：192.168.254.128
[*]LVS的VIP：192.168.254.100
[*]RS_1的IP：192.168.254.129
[*]RS_1的TUN IP（tunl0）：192.168.254.100
[*]RS_2的IP：192.168.254.129
[*]RS_2的TUN IP（tunl0）：192.168.254.100
配置LVS：
Java代码
[*]iptables -F
[*]echo "0">/proc/sys/net/ipv4/ip_forward
[*]ifconfig eth1:0 192.168.254.100 netmask 255.255.255.255 broadcast 192.168.254.100 up
[*]route add -host 192.168.254.100 dev eth1:0
[*]ipvsadm -C
[*]ipvsadm -A -t 192.168.254.100:80 -s rr
[*]ipvsadm -a -t 192.168.254.100:80 -r 192.168.254.129 -i -w 1
[*]ipvsadm -a -t 192.168.254.100:80 -r 192.168.254.130 -i -w 1
配置RS_1：
Java代码
[*]iptables -F
[*]ifconfig tunl0 192.168.254.100 netmask 255.255.255.255 broadcast 192.168.254.100 up
[*]route add -host 192.168.254.100 dev tunl0
[*]cd /var/www/html/
[*]echo "129">index.html
[*]apachectl start
配置RS_2：
Java代码
[*]iptables -F
[*]ifconfig tunl0 192.168.254.100 netmask 255.255.255.255 broadcast 192.168.254.100 up
[*]route add -host 192.168.254.100 dev tunl0
[*]cd /var/www/html/
[*]echo "130">index.html
[*]apachectl start
页:
[1]