haproxy+keepalived+nginx(源码)

• 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

[[email protected] ~]# cd /usr/local/src/;wget 
[[email protected] src]# tar zxvf keepalived-1.2.15.tar.gz 
[[email protected] 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.            !!!
[[email protected] keepalived-1.2.15]# yum -y install openssl-devel  
[[email protected] 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
[[email protected] keepalived-1.2.15]# make && make install
[[email protected] ~]# cp /usr/local/keepalived-1.2.15/etc/rc.d/init.d/keepalived /etc/init.d/keepalived
[[email protected] ~]# cp /usr/local/keepalived-1.2.15/sbin/keepalived /usr/sbin/
[[email protected] ~]# cp /usr/local/keepalived-1.2.15/etc/sysconfig/keepalived /etc/sysconfig/
[[email protected] ~]# mkdir -v /etc/keepalived
mkdir: created directory `/etc/keepalived‘
[[email protected] ~]# cp /usr/local/keepalived-1.2.15/etc/keepalived/keepalived.conf /etc/keepalived/
[[email protected] ~]# chmod a+x /etc/init.d/keepalived 
[[email protected] ~]# chkconfig --add /etc/init.d/keepalived 
[[email protected] ~]# cat /etc/keepalived/keepalived.conf 
! Configuration File for keepalived

global_defs {
   notification_email {
     [email protected]
   }
   notification_email_from [email protected]
   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

[[email protected] src]wget http://haproxy.1wt.eu/download/1.4/src/haproxy-1.4.24.tar.gz
[[email protected] src]# tar zxvf haproxy-1.4.24.tar.gz
[[email protected] haproxy-1.4.24]# make TARGET=linux26 ARCH=x84_64 PREFIX=/usr/local/haproxy-1.4.24
[[email protected] haproxy-1.4.24]# make install PREFIX=/usr/local/haproxy-1.4.24
[[email protected] haproxy-1.4.24]# mkdir /etc/haproxy
[[email protected] haproxy-1.4.24]# cp examples/haproxy.cfg /etc/haproxy/
[[email protected] haproxy-1.4.24]# cp examples/haproxy.init /etc/init.d/haproxy
[[email protected] 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‘
[[email protected] haproxy-1.4.24]# chmod a+x /etc/init.d/haproxy 
[[email protected] haproxy-1.4.24]# chkconfig --add haproxy
[[email protected] haproxy-1.4.24]# chkconfig haproxy on
[[email protected] haproxy-1.4.24]# chkconfig --list haproxy
haproxy            0:off    1:off    2:on    3:on    4:on    5:on    6:off

http://pynliu.blog.51cto.com/5027391/1619400

http://bbotte.blog.51cto.com/6205307/1606877

http://siriusz.blog.51cto.com/8150455/1368188