haproxy负载均衡166.110.110.100
后端服务器1 166.110.110.1
后端服务器2 166.110.110.2
--------------------------------------------------centos 7 处理----------------------------------------------------
关闭SELinux
vi /etc/selinux/config
#SELINUX=enforcing #注释掉
#SELINUXTYPE=targeted #注释掉
SELINUX=disabled #增加
:wq! #保存退出
setenforce 0 #使配置立即生效
关闭centos 7的防火墙(仅在测试的时候)
systemctl stop firewalld.service
systemctl disable firewalld.service
--------------------------------------------------haproxy安装----------------------------------------------------
yum install wget gcc -y && wget -c --no-check-certificate https://src.fedoraproject.org/repo/pkgs/haproxy/haproxy-1.8.12.tar.gz && tar -xvf haproxy-1.8.12.tar.gz && cd haproxy-1.8.12
groupadd haproxy #添加haproxy组
useradd -g haproxy haproxy -s /bin/false #创建nginx运行账户haproxy并加入到haproxy组，不允许haproxy
--------------------------------------------------haproxy配置----------------------------------------------------
vi /etc/haproxy/haproxy.cfg
修改为以下配置
#---------------------------------------------------------------------
# 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
#---------------------------------------------------------------------
listen admin_stats
bind 127.0.0.1:1080 #监听端口
mode http #http的7层模式
option httplog #采用http日志格式
#log 127.0.0.1 local0 err
maxconn 10
stats refresh 30s #统计页面自动刷新时间
stats uri /stats #统计页面url
stats realm Proxy Haproxy #统计页面密码框上提示文本
stats auth admin:admin #统计页面用户名和密码设置
stats hide-version #隐藏统计页面上HAProxy的版本信息
listen test1
bind 0.0.0.0:80
mode tcp
balance leastconn
#maxconn 40000
#log 127.0.0.1 local0 debug
server s1 166.110.110.1:80
server s2 166.110.110.2:80
------------------------------------------------------------------------------------------------------
centos7下haproxy启动停止重启重载状态等控制命令
systemctl (start, stop, restart, try-restart, reload, force-reload, status) haproxy.service
haproxy web监控信息166.110.110.100为haproxy安装所在服务器IP
http://166.110.110.100:1080/status
-----------------------------后端安装lighttpd 作为测试用----------------------------------------------
systemctl stop firewalld.service
systemctl disable firewalld.service
关闭SELinux
vi /etc/selinux/config
将SELINUX=enforcing改为SELINUX=disabled
安装
yum install -y epel-release gcc gcc-c++ autoconf automake zlib zlib-devel pcre-devel zip unzip libtool bzip2-* && yum install -y lighttpd && systemctl enable lighttpd
编辑配置文件关闭ipv6
vi /etc/lighttpd/lighttpd.conf
注释掉ipv6
启动服务器
systemctl restart lighttpd.service
默认目录及首页
/var/www/lighttpd/index.html
对两个index.html进行修改进行区别
后端第一个服务器
echo "<h1>this is upstream server 1" >> /var/www/lighttpd/index.html
后端第二个服务器
echo "<h1>this is upstream server 2" >> /var/www/lighttpd/index.html
访问haproxy所在服务器IP或者解析的域名刷新试试
-----------------------------Haproxy 负载均衡的8种算法----------------------------------------
balance roundrobin # 轮询，软负载均衡基本都具备这种算法
balance static-rr # 根据权重，建议使用
balance leastconn # 最少连接者先处理，建议使用
balance source # 根据请求源IP，建议使用
balance uri # 根据请求的URI
balance url_param，# 根据请求的URl参数'balance url_param' requires an URL parameter name
balance hdr(name) # 根据HTTP请求头来锁定每一次HTTP请求
balance rdp-cookie(name) # 根据据cookie(name)来锁定并哈希每一次TCP请求
