haproxy+keepalived+nginx(源码)

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• 软件介绍
  
  
  

HAProxy提供高可用性、负载均衡以及基于TCP和HTTP应用的代理，支持虚拟主机，它是免费、快速并且可靠的一种解决方案，适用于那些负载特大的web站点，这些站点通常又需要会话保持或七层处理。HAProxy运行在当前的硬件上，完全可以支持数以万计的并发连接。并且它的运行模式使得它可以很简单安全的整合进您当前的架构中，同时可以保护你的web服务器不被暴露到网络上。

keepalived可提供vrrp以及health-check功能，可以只用它提供双机浮动的vip（vrrp虚拟路由功能），这样可以简单实现一个双机热备高可用功能，类似于layer3, 4 & 5交换机制的软件，也就是我们平时说的第3层、第4层和第5层交换，作用是检测web服务器的状态，如果有一台web服务器死机，或工作出现故障，Keepalived将检测到，并将有故障的web服务器从系统中剔除，当web服务器工作正常后Keepalived自动将web服务器加入到服务器群中，这些工作全部自动完成，不需要人工干涉，需要人工做的只是修复故障的web服务器

• 实验环境
  
  

keepalived+Haproxy  192.168.40.144

keepalived+Haproxy  192.168.40.135

vip:   192.168.40.100

web01: 192.168.40.144:80

web02: 192.168.40.135:80

• 操作
  
  

1.安装Keepalived

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[iyunv@server01 ~]# cd /usr/local/src/;wget [iyunv@server01 src]# tar zxvf keepalived-1.2.15.tar.gz [iyunv@server01 keepalived-1.2.15]# ./configure --prefix=/usr/local/keepalived-1.2.15 ..... configure: error:   !!! OpenSSL is not properly installed on your system. !!!   !!! Can not include OpenSSL headers files.            !!! [iyunv@server01 keepalived-1.2.15]# yum -y install openssl-devel   [iyunv@server01 keepalived-1.2.15]# ./configure --prefix=/usr/local/keepalived-1.2.15 ....编译安装成功 Keepalived configuration ------------------------ Keepalived version       : 1.2.15 Compiler                 : gcc Compiler flags           : -g -O2 Extra Lib                : -lssl -lcrypto -lcrypt Use IPVS Framework       : Yes IPVS sync daemon support : Yes IPVS use libnl           : No fwmark socket support    : Yes Use VRRP Framework       : Yes Use VRRP VMAC            : Yes SNMP support             : No SHA1 support             : No Use Debug flags          : No [iyunv@server01 keepalived-1.2.15]# make && make install [iyunv@server01 ~]# cp /usr/local/keepalived-1.2.15/etc/rc.d/init.d/keepalived /etc/init.d/keepalived [iyunv@server01 ~]# cp /usr/local/keepalived-1.2.15/sbin/keepalived /usr/sbin/ [iyunv@server01 ~]# cp /usr/local/keepalived-1.2.15/etc/sysconfig/keepalived /etc/sysconfig/ [iyunv@server01 ~]# mkdir -v /etc/keepalived mkdir: created directory `/etc/keepalived' [iyunv@server01 ~]# cp /usr/local/keepalived-1.2.15/etc/keepalived/keepalived.conf /etc/keepalived/ [iyunv@server01 ~]# chmod a+x /etc/init.d/keepalived [iyunv@server01 ~]# chkconfig --add /etc/init.d/keepalived [iyunv@server01 ~]# cat /etc/keepalived/keepalived.conf ! Configuration File for keepalived global_defs {    notification_email {      kaibintest@126.com    }    notification_email_from keepalived@test.com    smtp_server 192.168.40.144    smtp_connect_timeout 30    router_id HAPROXY_MASTER } vrrp_script chk_haproxy {                                                  script "/usr/local/keepalived-1.2.15/check_haproxy.sh"                 interval 2                                                         weight 2                                                     } vrrp_instance VI_1 {     state MASTER     interface eth0     virtual_router_id 51     priority 101     advert_int 1     authentication {         auth_type PASS         auth_pass 1111     } track_script {                                                              chk_haproxy         }     virtual_ipaddress {         192.168.40.100     } }

2.安装Haproxy

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[iyunv@centos-node1 src]wget http://haproxy.1wt.eu/download/1.4/src/haproxy-1.4.24.tar.gz [iyunv@server01 src]# tar zxvf haproxy-1.4.24.tar.gz [iyunv@server01 haproxy-1.4.24]# make TARGET=linux26 ARCH=x84_64 PREFIX=/usr/local/haproxy-1.4.24 [iyunv@server01 haproxy-1.4.24]# make install PREFIX=/usr/local/haproxy-1.4.24 [iyunv@server01 haproxy-1.4.24]# mkdir /etc/haproxy [iyunv@server01 haproxy-1.4.24]# cp examples/haproxy.cfg /etc/haproxy/ [iyunv@server01 haproxy-1.4.24]# cp examples/haproxy.init /etc/init.d/haproxy [iyunv@server01 haproxy-1.4.24]# ln -svf /usr/local/haproxy-1.4.24/sbin/haproxy /usr/sbin/haproxy `/usr/sbin/haproxy' -> `/usr/local/haproxy-1.4.24/sbin/haproxy' [iyunv@server01 haproxy-1.4.24]# chmod a+x /etc/init.d/haproxy [iyunv@server01 haproxy-1.4.24]# chkconfig --add haproxy [iyunv@server01 haproxy-1.4.24]# chkconfig haproxy on [iyunv@server01 haproxy-1.4.24]# chkconfig --list haproxy haproxy            0:off    1:off    2:on    3:on    4:on    5:on    6:off