LVS+keepalived+nginx+tomcat部署实现
拓扑如下所示
# 节点分布情况
LVS-dr-master
eth0: 192.168.146.141
LVS-dr-slave
eth0: 192.168.146.142
nginx1:
eth0: 192.168.146.139
nginx2:
eth0: 192.168.146.140
tomcat1:
eth0: 192.168.146.138 启用了4个tomcat
VIP: 192.168.146.200
# 具体配置
### lvs master
### 1、安装ipvsadm、keepalived
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yum install -y keepalived ipvsadm |
### 2、使用keepalived来管理lvs
脚本：
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global_defs{router_id master_210} vrrp_instance aiyou {state MASTERinterface eth0virtual_router_id 100 #这个数值 master和slave必须统一priority 151 #这个数值决定哪台服务器是master advert_int 1authentication { auth_type PASS auth_pass 123456 }virtual_ipaddress { 192.168.146.200 }}virtual_server 192.168.146.200 80 { delay_loop 6 lb_algo wrr lb_kind DR# persistence_timeout 50 protocol TCPreal_server 192.168.146.139 80 { weight 1 TCP_CHECK { connect_timeout 3 nb_get_retry 3 delay_before_retry 3 connect_port 80 } }real_server 192.168.146.140 80 { weight 1 TCP_CHECK { connect_timeout 3 nb_get_retry 3 delay_before_retry 3 connect_port 80 } }} |
### lvs slave
### 1、安装ipvsadm、keepalived
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yum install -y keepalived ipvsadm |
### 2、使用keepalived来管理lvs
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global_defs{router_id slave_211} vrrp_instance aiyou {state MASTERinterface eth0virtual_router_id 100 #这个数值 master和slave必须统一priority 150 #这个数值决定哪台服务器是master 这里我们比master数值低，所以角色是backup，advert_int 1authentication { auth_type PASS auth_pass 123456 }virtual_ipaddress { 192.168.146.200 }}virtual_server 192.168.146.200 80 { delay_loop 6 lb_algo wrr lb_kind DR# persistence_timeout 50 protocol TCPreal_server 192.168.146.139 80 { weight 1 TCP_CHECK { connect_timeout 3 nb_get_retry 3 delay_before_retry 3 connect_port 80 } }real_server 192.168.146.140 80 { weight 1 TCP_CHECK { connect_timeout 3 nb_get_retry 3 delay_before_retry 3 connect_port 80 } }} |
### nginx1
### nginx上要跑个脚本
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#!/bin/bash # # Script to start LVS DR real server. # description: LVS DR real server # . /etc/rc.d/init.d/functionsVIP=192.168.146.200 #这里根据需要改成自己的VIP地址host=`/bin/hostname`case "$1" in start) # Start LVS-DR real server on this machine. /sbin/ifconfig lo down /sbin/ifconfig lo up 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 /sbin/ifconfig lo:0 $VIP broadcast $VIP netmask 255.255.255.255 up /sbin/route add -host $VIP dev lo:0;; stop) # Stop LVS-DR real server loopback device(s). /sbin/ifconfig lo:0 down 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;; status) # Status of LVS-DR real server. islothere=`/sbin/ifconfig lo:0 | grep $VIP` isrothere=`netstat -rn | grep "lo:0" | grep $VIP` if [ ! "$islothere" -o ! "isrothere" ];then # Either the route or the lo:0 device # not found. echo "LVS-DR real server Stopped." else echo "LVS-DR real server Running." fi ;; *) # Invalid entry. echo "$0: Usage: $0 {start|status|stop}" exit 1 ;; esac |
### nginx2
### nginx上要跑个脚本
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#!/bin/bash # # Script to start LVS DR real server. # description: LVS DR real server # . /etc/rc.d/init.d/functionsVIP=192.168.146.200 #这里根据需要改成自己的VIP地址host=`/bin/hostname`case "$1" in start) # Start LVS-DR real server on this machine. /sbin/ifconfig lo down /sbin/ifconfig lo up 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 /sbin/ifconfig lo:0 $VIP broadcast $VIP netmask 255.255.255.255 up /sbin/route add -host $VIP dev lo:0;; stop) # Stop LVS-DR real server loopback device(s). /sbin/ifconfig lo:0 down 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;; status) # Status of LVS-DR real server. islothere=`/sbin/ifconfig lo:0 | grep $VIP` isrothere=`netstat -rn | grep "lo:0" | grep $VIP` if [ ! "$islothere" -o ! "isrothere" ];then # Either the route or the lo:0 device # not found. echo "LVS-DR real server Stopped." else echo "LVS-DR real server Running." fi ;; *) # Invalid entry. echo "$0: Usage: $0 {start|status|stop}" exit 1 ;; esac |
### 后端tomcat安装省略
采用一机多实例模式（非多虚拟主机）
### 测试
### master上验证
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[root@lvs1 ~]# ipvsadm -lnIP Virtual Server version 1.2.1 (size=4096)Prot LocalAddress:Port Scheduler Flags -> RemoteAddress:Port Forward Weight ActiveConn InActConnTCP 192.168.146.200:80 wrr -> 192.168.146.139:80 Route 1 0 0 -> 192.168.146.140:80 Route 1 0 0 [root@lvs1 ~]# |
### slave上验证
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[root@lvs2 ~]# ipvsadm -lnIP Virtual Server version 1.2.1 (size=4096)Prot LocalAddress:Port Scheduler Flags -> RemoteAddress:Port Forward Weight ActiveConn InActConnTCP 192.168.146.200:80 wrr -> 192.168.146.139:80 Route 1 0 0 -> 192.168.146.140:80 Route 1 0 0 [root@lvs2 ~]# |
参考文章：
http://www.5ilinux.com/2014/05/lvs_keepalived_nginx_tomcat.html
http://lovelace.blog.51cto.com/1028430/1550188
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