【在CentOS下安装haproxy】
sudo yum install haproxy
编辑配置文件 vim /etc/haproxy/haproxy.cfg
#---------------------------------------------------------------------
# Example configuration for a possible web application. See the
# full configuration options online.
#
# http://haproxy.1wt.eu/download/1.4/doc/configuration.txt
#
#---------------------------------------------------------------------
#---------------------------------------------------------------------
# Global settings
#---------------------------------------------------------------------
global
# to have these messages end up in /var/log/haproxy.log you will
# need to:
#
# 1) configure syslog to accept network log events. This is done
# by adding the '-r' option to the SYSLOGD_OPTIONS in
# /etc/sysconfig/syslog
#
# 2) configure local2 events to go to the /var/log/haproxy.log
# file. A line like the following can be added to
# /etc/sysconfig/syslog
#
# local2.* /var/log/haproxy.log
#
log 127.0.0.1 local2
chroot /var/lib/haproxy
pidfile /var/run/haproxy.pid
maxconn 4000
user haproxy
group haproxy
daemon
# turn on stats unix socket
stats socket /var/lib/haproxy/stats
#---------------------------------------------------------------------
# common defaults that all the 'listen' and 'backend' sections will
# use if not designated in their block
#---------------------------------------------------------------------
defaults
mode http
log global
option httplog
option dontlognull
option http-server-close
option forwardfor except 127.0.0.0/8
option redispatch
retries 3
timeout http-request 10s
timeout queue 1m
timeout connect 10s
timeout client 1m
timeout server 1m
timeout http-keep-alive 10s
timeout check 10s
maxconn 3000
#---------------------------------------------------------------------
# main frontend which proxys to the backends 前端端口5000,规则url路径,静态文件名
#---------------------------------------------------------------------
frontend main *:5000
acl url_static path_beg -i /static /images /javascript /stylesheets
acl url_static path_end -i .jpg .gif .png .css .js
use_backend static if url_static
default_backend app
#---------------------------------------------------------------------
# static backend for serving up images, stylesheets and such 后端静态文件服务器
#---------------------------------------------------------------------
backend static
balance roundrobin
server static 192.168.0.27:80 check
#---------------------------------------------------------------------
# round robin balancing between the various backends 后端动态文件服务器
#---------------------------------------------------------------------
backend app
balance roundrobin
server app1 192.168.0.27:80 check
server app2 192.168.0.28:80 check
sudo service haproxy restart
【在CentOS下安装apache】
CentOS的软件管理程序是yum
首先还是安装Apache。
sudo yum install httpd
与openSUSE类似，安装完需要自己手动配置服务自启动。
sudo chkconfig --levels 235 httpd on
然后立即启动Apache服务。
sudo /etc/init.d/httpd start
现在再用浏览器访问服务器地址就可以正常访问Http服务器了。
