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+Haproxy192.168.40.144keepalived+Haproxy192.168.40.135vip: 192.168.40.100
web01: 192.168.40.144:80web02: 192.168.40.135:80
[*]操作
1.安装Keepalived
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# cd /usr/local/src/;wget
# tar zxvf keepalived-1.2.15.tar.gz
# ./configure --prefix=/usr/local/keepalived-1.2.15
.....
configure: error:
!!! OpenSSL is not properly installed on your system. !!!
!!! Can not include OpenSSL headers files. !!!
# yum -y install openssl-devel
# ./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
# make && make install
# cp /usr/local/keepalived-1.2.15/etc/rc.d/init.d/keepalived /etc/init.d/keepalived
# cp /usr/local/keepalived-1.2.15/sbin/keepalived /usr/sbin/
# cp /usr/local/keepalived-1.2.15/etc/sysconfig/keepalived /etc/sysconfig/
# mkdir -v /etc/keepalived
mkdir: created directory `/etc/keepalived'
# cp /usr/local/keepalived-1.2.15/etc/keepalived/keepalived.conf /etc/keepalived/
# chmod a+x /etc/init.d/keepalived
# chkconfig --add /etc/init.d/keepalived
# 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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wget http://haproxy.1wt.eu/download/1.4/src/haproxy-1.4.24.tar.gz
# tar zxvf haproxy-1.4.24.tar.gz
# make TARGET=linux26 ARCH=x84_64 PREFIX=/usr/local/haproxy-1.4.24
# make install PREFIX=/usr/local/haproxy-1.4.24
# mkdir /etc/haproxy
# cp examples/haproxy.cfg /etc/haproxy/
# cp examples/haproxy.init /etc/init.d/haproxy
# ln -svf /usr/local/haproxy-1.4.24/sbin/haproxy /usr/sbin/haproxy
`/usr/sbin/haproxy' -> `/usr/local/haproxy-1.4.24/sbin/haproxy'
# chmod a+x /etc/init.d/haproxy
# chkconfig --add haproxy
# chkconfig haproxy on
# chkconfig --list haproxy
haproxy 0:off 1:off 2:on 3:on 4:on 5:on 6:off
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