腳本實作VS/DR類型的快速部署

目錄

1、概述

2、director腳本

3、real server腳本

4、總結

1、概述 

    LVS的DR類型是在生産環境中運用比較多的部署類型，後端real server伺服器的上線、下線的配置比較繁瑣，是以可利用bash腳本來完成。本部落格基于http://zhaochj.blog.51cto.com/368705/1650198中“虛拟服務VS/DR類型實作”的部份整理了兩個腳本，一個是在director上執行，一個在各real server上執行的腳本。

[root@HAPROXY scripts]# vim vs_dr
#!/bin/sh
#Program: This script set vs/dr.
#Author: zhaochj
#Date: 2015-05-11
#Version: 1.0
#chkconfig: 235 90 120
# Source function library.
source /etc/init.d/functions
# declare variables
VIP=192.168.0.222
RIP1=192.168.0.201
RIP2=192.168.0.202
PORT=80
RSWEIGHT1=1
RSWEIGHT2=1
# iptables set
iptables -F
iptables -X
iptables -Z
iptables -P INPUT DROP
iptables -P OUTPUT ACCEPT
iptables -P FORWARD ACCEPT
iptables -A INPUT -i lo -j ACCEPT
iptables -A OUTPUT -o lo -j ACCEPT
iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
iptables -A INPUT -i eth+ -p icmp --icmp-type 8 -j ACCEPT
iptables -A INPUT -p tcp --dport 22 -j ACCEPT
iptables -A INPUT -p tcp -d $VIP --dport 80 -j ACCEPT
# set director
case "$1" in
        start)
                echo "1" > /proc/sys/net/ipv4/ip_forward
                ifconfig eth0:0 $VIP netmask 255.255.255.0 up
                ipvsadm -C
                ipvsadm -A -t $VIP:$PORT -s wlc
                ipvsadm -a -t $VIP:$PORT -r $RIP1:$PORT -g -w $RSWEIGHT1
                ipvsadm -a -t $VIP:$PORT -r $RIP2:$PORT -g -w $RSWEIGHT2
                touch /var/lock/subsys/lvs-dr.lock & > /dev/null
                echo "VS/DR is starting"
                ;;
        stop)
                echo "0" > /proc/sys/net/ipv4/ip_forward
                ifconfig eth0:0 down
                ipvsadm -C
                rm /var/lock/subsys/lvs-dr.lock
                echo "VS/DR is stoped"
                ;;
        status)
                [ -e /var/lock/subsys/lvs-dr.lock ] && ipvsadm -L -n || echo "VS/DR is not running"
                ;;
        *)
                echo "Usage $0 {start|stop|status}"
                ;;
esac      

[root@slave scripts]# vim dr_rs
#!/bin/sh
#Program: This script is set VS/DR real server
#Author: zhaochj
#Date: 2015-05-11
#Version: 1.0
#chkconfig: 235 86 130
# Source function library
source /etc/init.d/functions
# declare variables
VIP=192.168.0.222
PORT=80
# iptables set
iptables -F
iptables -X
iptables -Z
iptables -P INPUT DROP
iptables -P OUTPUT ACCEPT
iptables -P FORWARD DROP
iptables -A INPUT -i lo -j ACCEPT
iptables -A OUTPUT -o lo -j ACCEPT
iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
iptables -A INPUT -p icmp --icmp-type 8 -j ACCEPT
iptables -A INPUT -p tcp --dport 22 -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j ACCEPT
# set real server
case "$1" in
        start)
                echo "1" > /proc/sys/net/ipv4/conf/lo/arp_ignore
                echo "1" > /proc/sys/net/ipv4/conf/all/arp_ignore
                echo "2" > /proc/sys/net/ipv4/conf/lo/arp_announce
                echo "2" > /proc/sys/net/ipv4/conf/all/arp_announce
                ifconfig lo:0 $VIP netmask 255.255.255.255 broadcast $VIP up
                route add -host $VIP dev lo:0
                echo "VS/DR real server running"
        ;;
        stop)
                echo "0" > /proc/sys/net/ipv4/conf/lo/arp_ignore
                echo "0" > /proc/sys/net/ipv4/conf/all/arp_ignore
                echo "0" > /proc/sys/net/ipv4/conf/lo/arp_announce
                echo "0" > /proc/sys/net/ipv4/conf/all/arp_announce
                route del -host $VIP
                ifconfig lo:0 down
                echo "VS/DR/real server stoped"
        ;;
        status)
                Lostat=`ifconfig lo:0 | grep $VIP`
                Return=`echo $?`
                [ $Return != "0" ] && echo "VS/DR real server stoped" || echo "VS/DR real server running"
        ;;
        *)
                echo "Usage $0{start|stop|status}"
        ;;
esac