haproxy服务配置
环境说明-两台服务器：server1: 192.168.10.71
server2: 192.168.10.72
server1配置HAProxy，server2配置lamp并搭建WordPress博客，php测试页为test.php
配置haproxy
yum install haproxy
haproxy -v
HA-Proxy version 1.5.18 2016/05/10
haproxy -vv//显示详细信息
haproxy -h
配置rsyslog
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vi /etc/rsyslog.conf
$ModLoad imudp
$UDPServerRun 514
local2.* /var/log/haproxy.log
systemctl restart rsyslog
配置haproxy
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vi /etc/haproxy/haproxy.cfg
frontend web *:80
default_backend myweb
backend myweb
balance roundrobin
server web1 192.168.10.72 check
检查配置
haproxy -c -f /etc/haproxy/haproxy.cfg
启动服务
systemctl start haproxy
查看日志信息
more /var/log/haproxy.log
测试代理访问：
http://192.168.10.71
curl 127.0.0.1/test.php//访问后端lamp的测试页
lamp-wp-test-php-10.72
新增一台httpd服务器server3-10.73，创建一个测试页
echo "lamp-wp-test-php-10.73" > /var/www/html/test.php
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修改haproxy配置，实现负载均衡
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vi /etc/haproxy/haproxy.cfg
frontend web *:80
default_backend myweb
backend myweb
balance roundrobin
server web1 192.168.10.72:80 check
server web2 192.168.10.73:80 check
访问测试，可以实现轮询
for i in {1..10};do curl 192.168.10.71/test.php;done
more /var/log/haproxy.log
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一致性hash算法配置：
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backend myweb
balance uri
server web1 192.168.10.72:80 check
server web2 192.168.10.73:80 check
hash-typeconsistent
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配置压缩
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compression algo gzip
compression type text/html text/plain application/xml
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定义sorry server配置：
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server web2 192.168.10.71:80 check backup
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配置状态检测和管理页面
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vi /etc/haproxy/haproxy.cfg增加如下配置段
listen stats
bind :8888
stats enable
stats url /myproxy?stats
stats realm HAPorxy\ Stats\ Page
stats auth admin:admin
stats admin if TRUE
stats refresh 3
acl allowip src 192.168.10.72
block if !allowip//只允许上面定义的IP访问
errorloc 403 http://192.168.10.72/errorip.html
10.72上定义错误页面：
echo "sorry you can't see it" > /var/www/html/errorip.html
10.72访问：
http://192.168.10.71/haproxy?stats
10.73上测试显示403错误页面：
elinks http://192.168.10.71:8888/myproxy?stats
sorry you can't see it
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tcp的负载均衡，实现ssh代理
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vi /etc/haproxy/haproxy.cfg//需要更改mode模式为tcp
defaults
mode tcp
option tcplog
listen ssh
mode tcp
bind *:2222
balance leastconn
server ssh1 192.168.10.72:22 check
server ssh2 192.168.10.73:22 check
测试：
haproxy -c -f /etc/haproxy/haproxy.cfg
systemctl restart haproxy
ssh 192.168.10.71 -p 2222
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haproxy实现动静分离代理
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vi /etc/haproxy/haproxy.cfg
frontend web *:80
acl static path_end .jpg .png .txt
acl static path_begin /images /css /imgs
use_backend imgsrv if staic//如果是匹配上面定义的static-acl则代理到imgsrv服务器组
default_backend myweb//默认访问的是myweb服务器组
backend myweb
balance roundrobin
server web1 192.168.10.72:80 check
server web2 192.168.10.73:80 check
backend imgsrv
balance roundrobin
server web1 192.168.10.72:8080 check
server web2 192.168.10.73:8080 check
测试访问：
http://192.168.10.71/messages.txt
http://192.168.10.71/test.php
页:
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