haproxy+keepalived构建高可用负载均衡
web1 IP 192.168.0.47web2 IP 192.168.0.48
haproxy_master 192.168.0.200
haproxy_backup 192.168.0.199
VIP 192.168.0.155
http://blog.运维网.com/attachment/201301/171937703.gif
一.安装keepalived
[*]#wget http://www.keepalived.org/software/keepalived-1.1.15.tar.gz
[*]#tar zxvf keepalived-1.1.15.tar.gz
[*]#cd keepalived-1.1.15
[*]#./configure
[*]#make
[*]#make install 将keepalived做成启动脚务 #cp /usr/local/etc/rc.d/init.d/keepalived /etc/rc.d/init.d/
#cp /usr/local/etc/sysconfig/keepalived /etc/sysconfig/
#mkdir /etc/keepalived
#cp /usr/local/etc/keepalived/keepalived.conf /etc/keepalived/
#cp /usr/local/sbin/keepalived /usr/sbin/
配置keepalived.conf
#vim /etc/keepalived/keepalived.conf
[*]print?! Configuration File for keepalived
[*]
[*]global_defs {
[*] notification_email {
[*] gaoming@123.com
[*] }
[*] notification_email_from gaoming@123.com
[*] smtp_server 192.168.200.1
[*] smtp_connect_timeout 30
[*] router_id LVS_DEVEL
[*]}
[*]
[*]vrrp_instance VI_1 {
[*] state MASTER #备用服务器上改为 BACKUP
[*] interface eth0
[*] virtual_router_id 51
[*] priority 100 #备用服务器上改为99
[*] advert_int 1
[*] authentication {
[*] auth_type PASS
[*] auth_pass 1111
[*] }
[*] virtual_ipaddress {
[*] 192.168.0.155/24 dev eth0 scope global
[*] }
[*]}
启动keepalived
service keepalived start
启动之后可以用ip add 查看网卡多了一条192.168.0.155的IP
eth0:mtu 1500 qdisc pfifo_fast qlen 1000
link/ether 00:0c:29:ff:6c:c7 brd ff:ff:ff:ff:ff:ff
inet 192.168.0.200/24 brd 192.168.0.255 scope global eth0
inet 192.168.0.155/24 scope global secondary eth0
inet6 fe80::20c:29ff:feff:6cc7/64 scope link
valid_lft forever preferred_lft forever
说明keepalived启动成功，配置生效
二.安装haproxy
#wget http://haproxy.1wt.eu/download/1.3/src/haproxy-1.3.20.tar.gz
#uname -a
Linux ip1 2.6.18-194.el5 #1 SMP Fri Apr 2 14:58:35 EDT 2010 i686 i686 i386 GNU/Linux
#make TARGET=linux26 prefix=/usr/local/haproxy install
#cd /usr/local/haproxy
配置haproxy
#vim haproxy.conf
[*] view plaincopyprint?global
[*] maxconn5120
[*] chroot /usr/local/haproxy
[*] uid 100
[*] gid 100
[*] daemon
[*] quiet
[*] nbproc 2
[*] pidfile/usr/local/haproxy/haproxy.pid
[*] ########################################################
[*]
[*]defaults
[*] log global
[*] log 127.0.0.1local3
[*] mode http
[*] optionhttplog
[*] optiondontlognull
[*] optionredispatch
[*] retries 3
[*]
[*] maxconn 3000
[*] contimeout 5000
[*] clitimeout 50000
[*] srvtimeout 50000
[*] stats enable
[*] stats uri /admin
[*] stats auth admin:admin
[*] stats realm Haproxy \ statistic
[*] ##########################################################
[*]
[*]frontend www.gaoming.com
[*] bind *:80
[*] default_backend server_pool
[*]backend server_pool
[*] mode http
[*] balance roundrobin
[*] optionforwardfor
[*] optionhttpclose
[*] optionhttpchk GET /index.html
[*] server web1 192.168.0.48:80 check inter 5000 fall 1 rise 2
[*] server web1 192.168.0.47:80 check inter 5000 fall 1 rise 2
haproxy的配置2台机器相同
启动haproxy
#/usr/local/haproxy/sbin/haproxy -f /usr/local/haproxy/haproxy.conf
域名解析到VIP上，用户访问VIP会负载到后端2台WEB上
测试高可用，关掉主haproxy，备用的会接管VIP
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