LVS实现DR（nginx）
1、架构图
2、RS配置httpd、php示例
[root@node02 ~]# yum install -y httpd php php-mysql
[root@node02 ~]# vim /var/www/html/phpinfo.php
RS1
phpinfo();
?>
[root@node02 ~]# vim /var/www/html/test1.html
RS1,192.168.32.128
[root@node02 ~]# vim setparam.sh
#!/bin/bash
case $1 in
start)
echo 1 > /proc/sys/net/ipv4/conf/all/arp_ignore
echo 1 > /proc/sys/net/ipv4/conf/lo/arp_ignore
echo 2 > /proc/sys/net/ipv4/conf/all/arp_announce
echo 2 > /proc/sys/net/ipv4/conf/lo/arp_announce
ifconfig $iface $vip netmask broadcast $vip up
route add -host $vip dev $iface
;;
stop)
ifconfig $iface down
echo 0 > /proc/sys/net/ipv4/conf/all/arp_ignore
echo 0 > /proc/sys/net/ipv4/conf/lo/arp_ignore
echo 0 > /proc/sys/net/ipv4/conf/all/arp_announce
echo 0 > /proc/sys/net/ipv4/conf/lo/arp_announce
;;
*)
echo "Usage: $(basename $0) start|stop"
exit 1
;;
esac
[root@node02 ~]#
[root@node02 ~]#
[root@node02 ~]# chmod +x setparam.sh
[root@node02 ~]# ls
anaconda-ks.cfg setparam.sh
[root@node02 ~]# bash -n setparam.sh
[root@node02 ~]# bash -x setparam.sh start
+ case $1 in
+ echo 1
+ echo 1
+ echo 2
+ echo 2
[root@node02 ~]# ifconfig lo:0 192.168.32.188 netmask 255.255.255.255 broadcast 192.168.32.188 up
[root@node02 ~]# route add -host 192.168.32.188 dev lo:0
[root@node02 ~]# ss -tnl
State Recv-Q Send-Q Local Address:Port
LISTEN 0 128 *:111
LISTEN 0 128 *:22
LISTEN 0 100 127.0.0.1:25
LISTEN 0 128 :::111
LISTEN 0 128 :::80
LISTEN 0 128 :::22
LISTEN 0 100 ::1:25
node03一样配置
改进RS脚本
[root@node02 ~]# more setparam.sh
#!/bin/bash
#
vip='192.168.32.188'
mask='255.255.255.255'
iface='lo:0'
case $1 in
start)
echo 1 > /proc/sys/net/ipv4/conf/all/arp_ignore
echo 1 > /proc/sys/net/ipv4/conf/lo/arp_ignore
echo 2 > /proc/sys/net/ipv4/conf/all/arp_announce
echo 2 > /proc/sys/net/ipv4/conf/lo/arp_announce
ifconfig $iface $vip netmask broadcast $vip up
route add -host $vip dev $iface
;;
stop)
ifconfig $iface down
echo 0 > /proc/sys/net/ipv4/conf/all/arp_ignore
echo 0 > /proc/sys/net/ipv4/conf/lo/arp_ignore
echo 0 > /proc/sys/net/ipv4/conf/all/arp_announce
echo 0 > /proc/sys/net/ipv4/conf/lo/arp_announce
;;
*)
echo "Usage: $(basename $0) start|stop"
exit 1
;;
esac
3、VS配置
[root@node01 ~]# ifconfig ens33:0 192.168.32.188 netmask 255.255.255.255 broadcast 192.168.32.188 up
[root@node01 ~]# yum install -y ipvsadm
[root@node01 ~]# ipvsadm -A -t 192.168.32.188:80 -s rr
[root@node01 ~]# ipvsadm -ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 192.168.32.188:80 rr
[root@node01 ~]# ipvsadm -a -t 192.168.32.188:80 -r 192.168.32.128 -g
[root@node01 ~]# ipvsadm -a -t 192.168.32.188:80 -r 192.168.32.131 -g
[root@node01 ~]# ipvsadm -ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 192.168.32.188:80 rr
-> 192.168.32.128:80 Route 1 0 0
-> 192.168.32.131:80 Route 1 0 0
VS的配置脚本：
#!/bin/bash
#
vip='192.168.32.188'
iface='ens33:0'
mask='255.255.255.255'
port='80'
rs1='192.168.32.128'
rs2='192.168.32.131'
scheduler='wrr'
type='-g'
case $1 in
start)
ifconfig $iface $vip netmask $mask broadcast $vip up
iptables -F
ipvsadm -A -t ${vip}:${port} -s $scheduler
ipvsadm -a -t ${vip}:${port} -r ${rs1} $type -w 1
ipvsadm -a -t ${vip}:${port} -r ${rs2} $type -w 1
;;
stop)
ipvsadm -C
ifconfig $iface down
;;
*)
echo "Usage $(basename $0) start|stop"
exit 1
;;
esac
4、验证
[40796.DESKTOP-Q4O3FV5] ➤ for i in {1..20}; do curl http://192.168.32.188/test1.html;done