作者:split_two
环境四台机器都是redhat4.8(64位)版本:
ip地址 用处
192.168.5.55 master
192.168.2.73 backup
192.168.5.54 负载a
192.168.5.57 负载b
192.168.2.100 vip
1、master上安装haproxy
wget http://haproxy.1wt.eu/download/1.3/src/haproxy-1.3.20.tar.gz /root
解压到当前目录
tar zxvf haproxy-1.3.20.tar.gz
进到此目录
cd haproxy-1.3.20
编译及安装,安装到/usr/local目录,但是安装完此目录下没有haproxy文件夹,我也很奇怪!
make target=linux26 prefix=/usr/local/haproxy install
但是出来的结果会提示如下信息
install -d /usr/local/sbin
install haproxy /usr/local/sbin
install -d /usr/local/share/man/man1
install -m 644 doc/haproxy.1 /usr/local/share/man/man1
install -d /usr/local/doc/haproxy
for x in configuration architecture haproxy-en haproxy-fr; do \
install -m 644 doc/$x.txt /usr/local/doc/haproxy ; \
done
提示你启动haproxy在sbin目录,其余的在doc目录
进入到haproxy目录
cd /usr/local/doc/haproxy
新建一个haproxy主配置文件
vi haproxy.cfg
global
log 127.0.0.1 local0
maxconn 4096
chroot /usr/local/doc/haproxy
uid 501
gid 501
daemon
nbproc 1
pidfile /usr/local/doc/haproxy/haproxy.pid
defaults
log 127.0.0.1 local3
mode http
option httplog
option httpclose
option dontlognull
option forwardfor
option redispatch
retries 2
maxconn 2000
balance roundrobin
stats uri /haproxy-status 查看状态
stats hide-version 隐藏haproxy版本
stats realm gemini\ haproxy 查看状态需要口令
stats auth admin:admin 用户名和密码
contimeout 5000
clitimeout 50000
srvtimeout 50000
listen web_proxy 192.168.2.100:80
server web1 192.168.5.54:8080 cookie app1inst1 check inter 2000 rise 2 fall 5
server web2 192.168.5.57:8080 cookie app1inst2 check inter 2000 rise 2 fall 5
2、master安装keepalived
tar zxvf keepalived-1.1.15.tar.gz
vi /usr/src/kernels/2.6.9-89.el-smp-x86_64/include/linux/types.h
将如下两行注释掉,否则编译会出错,跟我这个版本的系统有关系,你的也许不要!
/*
typedef __u16 __bitwise __sum16;
typedef __u32 __bitwise __wsum;
*/
cd keepalived-1.1.15
./configure
make
make install
将keepalived作为系统服务启动
cp /usr/local/etc/rc.d/init.d/keepalived /etc/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/
vi /etc/keepalived/keepalived.conf内容如下:
! configuration file for keepalived
global_defs {
router_id lva_devel
}
vrrp_script chk_http_port {
script "/root/check_haproxy.sh"
interval 2
weight 2
}
vrrp_instance vi_1 {
state master
interface eth0
virtual_router_id 51
priority 100
advert_int 1
authentication {
auth_type pass
auth_pass 1111
}
track_script {
chk_http_port
}
virtual_ipaddress {
192.168.2.100
}
}
上面调用了一个脚本check_haproxy.sh,内容如下:
#!/bin/bash
a=`ps -c haproxy --no-header | wc -l`
if [ $a -eq 0 ];then
/usr/local/sbin/haproxy -f /usr/local/doc/haproxy/haproxy.cfg
echo "haproxy start"
sleep 3
if [ `ps -c haproxy --no-header | wc -l` -eq 0 ];then
/etc/init.d/keepalived stop
echo "keepalived stop"
fi
fi
3、backup上安装haproxy,步骤就不详细介绍,和master上面一样的。
haproxy.conf内容如下
global
log 127.0.0.1 local0
maxconn 4096
chroot /usr/local/doc/haproxy
uid 501
gid 501
daemon
nbproc 1
pidfile /usr/local/doc/haproxy/haproxy.pid
defaults
log 127.0.0.1 local3
mode http
option httplog
option httpclose
option dontlognull
option forwardfor
option redispatch
retries 2
maxconn 2000
balance roundrobin
stats uri /haproxy-status
stats hide-version
stats realm gemini\ haproxy
stats auth admin:admin
contimeout 5000
clitimeout 50000
srvtimeout 50000
listen web_proxy 192.168.2.100:80
server web1 192.168.5.54:8080 cookie app1inst1 check inter 2000 rise 2 fall 5
server web2 192.168.5.57:8080 cookie app1inst2 check inter 2000 rise 2 fall 5
4、backup上安装keepalived,步骤也不多介绍,keepalived.conf文件内容就两处有变化,红色字体标出
! configuration file for keepalived
global_defs {
router_id lva_devel
}
vrrp_script chk_http_port {
script "/root/check_haproxy.sh"
interval 2
weight 2
}
vrrp_instance vi_1 {
state backup
interface eth0
virtual_router_id 51
priority 99
advert_int 1
authentication {
auth_type pass
auth_pass 1111
}
track_script {
chk_http_port
}
virtual_ipaddress {
192.168.2.100
}
}
调用脚本check_haproxy.sh内容:
#!/bin/bash
a=`ip a | grep 192.168.2.100 | wc -l`
b=`ps -ef | grep haproxy | grep -v grep | awk '{print $2}'`
if [ $a -gt 0 ];then
/usr/local/sbin/haproxy -f /usr/local/doc/haproxy/haproxy.cfg
else
kill -9 $b
fi
5、两台负载机器我就不多介绍了,用的是系统自带的apache
登录192.168.5.54上操作:
echo 'this is 192.168.5.54!' > /var/www/html/index.html
修改/etc/httpd/conf/httpd.conf文件的监听端口为8080
sed -i 's/listen 80/listen 8080/g' /etc/httpd/conf/httpd.conf
/etc/init.d/httpd start
登录192.168.5.57上操作:
echo 'hello,this is 192.168.5.57!' > /var/www/html/index.html
修改/etc/httpd/conf/httpd.conf文件的监听端口为8080
sed -i 's/listen 80/listen 8080/g' /etc/httpd/conf/httpd.conf
/etc/init.d/httpd start
6、测试步骤
启动master上的keepalived服务,再启动backup上的keepalived服务。
确定master上是否有192.168.2.100地址,用ip a查看即可!
然后手动杀掉master上的haproxy进程,看看是否能马上恢复进程?
停止master上的keepalived服务,确认backup是否接管vip地址?
最后再启动master上的keepalived服务,再确认master是否再接管vip地址?
总结:我这测试都没问题,如果有问题请给我留言!
原文: