Centos7下使用Harpoxy负载均衡Apache
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HAProxy是一个免费的,快速和可靠的解决方案提供高可用性、负载均衡,并为TCP代理和基于http的应用程序。特别适合高流量网站和高并发网站。什么是HAProxy
操作系统:Centos 7 主机分布:1 haproxy server, 3 client IP & Hostname :环境说明
192.168.0.50 server.rootworld.in 192.168.0.51 web1.rootworld.in 192.168.0.52 web2.rootworld.in 192.168.0.53 web3.rootworld.in1、在客户端机器上安装web服务器 WEB1
[root@web1 ~]# yum install httpd -y [root@web1 ~]# systemctl enable httpd.service [root@web1 ~]# systemctl start httpd.serviceWEB2
[root@web2 ~]# yum install httpd -y [root@web2 ~]# systemctl enable httpd.service [root@web2 ~]# systemctl start httpd.serviceWEB3
[root@web3 ~]# yum install httpd -y [root@web3 ~]# systemctl enable httpd.service [root@web3 ~]# systemctl start httpd.service2、检查您的web服务器工作正常。 3、安装HAProxy Server.
[root@server ~]# yum install haproxy openssl-devel -y
4、配置HAPorxy的主配置文件/etc/haproxy/haproxy.cfg,修改log日志位置
[root@server ~]# vim /etc/haproxy/haproxy.cfg
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5、配置启动UDP syslog reception 在/etc/rsyslog.conf配置文件中,并且把Haproxy日志单独放到/var/log目录下。
[root@server ~]# vim /etc/rsyslog.conf
$ModLoad imudp
$UDPServerRun 514
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6、在/etc/rsyslog.d/目录下配置haproxy.conf文件配置单独的log文件
[root@server ~]# vim /etc/rsyslog.d/haproxy.conf
local2.* /var/log/haproxy.log
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7、重启syslog服务,更新配置
[root@server ~]# service rsyslog restart
8、按照需求配置/etc/haproxy/haproxy.cfg文件
[root@server ~]# vim /etc/haproxy/haproxy.cfg
9、为均衡器在/etc/haproxy/haproxy.cfg配置前端和后端
# Configuration for HTTP site listen server 192.168.0.50:80 bind *:80 default_backend LBbackend backend LBbackend mode http server web1 192.168.0.51:80 check server web1 192.168.0.52:80 check server web1 192.168.0.53:80 check stats enable stats hide-version stats uri /stats stats realm Haproxy\ Statistics stats auth admin:redhat balance roundrobin option httpchk option httpclose option forwardfor cookie LB insert[attach]1489[/attach] 10、重启HAProxy服务并启用
[root@server ~]# systemctl enable haproxy.service [root@server ~]# systemctl restart haproxy.service [root@server ~]# systemctl status haproxy.service[attach]1490[/attach] 11、验证HAProxy负载均衡器
http://192.168.0.50/[attach]1493[/attach] [attach]1491[/attach] [attach]1492[/attach] 12、打开HAProxy监控服务面板
http://192.168.0.50/stats[attach]1494[/attach]
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● haproxy.service - HAProxy Load Balancer
Loaded: loaded (/usr/lib/systemd/system/haproxy.service; disabled; vendor preset: disabled)
Active: failed (Result: exit-code) since Thu 2018-03-15 14:42:05 EDT; 2s ago
Process: 1388 ExecStart=/usr/sbin/haproxy-systemd-wrapper -f /etc/haproxy/haproxy.cfg -p /run/haproxy.pid $OPTIONS (code=exited, status=1/FAILURE)
Main PID: 1388 (code=exited, status=1/FAILURE)
● haproxy.service - HAProxy Load Balancer
Loaded: loaded (/usr/lib/systemd/system/haproxy.service; disabled; vendor preset: disabled)
Active: failed (Result: exit-code) since Thu 2018-03-15 15:17:27 EDT; 4min 57s ago
Process: 1758 ExecStart=/usr/sbin/haproxy-systemd-wrapper -f /etc/haproxy/haproxy.cfg -p /run/haproxy.pid $OPTIONS (code=exited, status=1/FAILURE)
Main PID: 1758 (code=exited, status=1/FAILURE)
Mar 15 15:17:27 server systemd[1]: Started HAProxy Load Balancer.
Mar 15 15:17:27 server systemd[1]: Starting HAProxy Load Balancer...
Mar 15 15:17:27 server haproxy-systemd-wrapper[1758]: haproxy-systemd-wrapper: executing /usr/sbin/haproxy -f /et... -Ds
Mar 15 15:17:27 server haproxy-systemd-wrapper[1758]: [ALERT] 073/151727 (1759) : Proxy 'main': unable to find re...pp'.
Mar 15 15:17:27 server haproxy-systemd-wrapper[1758]: [WARNING] 073/151727 (1759) : parsing [/etc/haproxy/haproxy...ded.
Mar 15 15:17:27 server haproxy-systemd-wrapper[1758]: [ALERT] 073/151727 (1759) : Fatal errors found in configuration.
Mar 15 15:17:27 server systemd[1]: haproxy.service: main process exited, code=exited, status=1/FAILURE
Mar 15 15:17:27 server haproxy-systemd-wrapper[1758]: haproxy-systemd-wrapper: exit, haproxy RC=1
Mar 15 15:17:27 server systemd[1]: Unit haproxy.service entered failed state.
Mar 15 15:17:27 server systemd[1]: haproxy.service failed.
Hint: Some lines were ellipsized, use -l to show in full.
完整的配置文件:
#---------------------------------------------------------------------
# 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 192.168.2.135/8
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
#---------------------------------------------------------------------
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
#---------------------------------------------------------------------
backend static
balance roundrobin
server static 127.0.0.1:4331 check
#---------------------------------------------------------------------
# round robin balancing between the various backends
#---------------------------------------------------------------------
listen server 192.168.134.135:80
bind *:80
default_backend LBbackend
backend LBbackend
mode http
server web1 192.168.2.134:80 check
server web2 192.168.2.133:80 check
stats enable
stats hide-version
stats uri /stats
stats realm Haproxy\ Statistics
stats auth admin:redhat
balance roundrobin
option httpchk
option httpclose
option forwardfor
cookie LB insert