keepalived 安装配置

本文阐述 lvs+keepalived 完全安装以及配置教程

安装linux，可以选择完全安装（自带ip_vs,就不需要安装ipvsadm了）。

配置外网网卡地址 172.16.11.94

将LVS外网IP设成自己的内部IP

ifconfig lo:0 172.16.11.94 netmask 255.255.255.255 broadcast 172.16.11.94 up（不一定需要）

修改内网网卡地址为：

IPV6INIT=no

ONBOOT=yes

USERCTL=no

PEERDNS=yes

TYPE=Ethernet

DEVICE=eth1

BOOTPROTO=static

IPADDR=10.0.0.1

NETMASK=255.255.255.0

GATEWAY=10.0.0.1

创建 /usr/local/bin/ipvsadm.sh

文件内容如下：

#open IP Forwarding

echo 1 > /proc/sys/net/ipv4/ip_forward

# To make the load balancer forward the masquerading packets

iptables -t nat -A POSTROUTING -s 172.16.11.94/24 -d 0.0.0.0/0 -o eth0 -j MASQUERADE

ipvsadm -C

# Choose the Weighted Round Robing

ipvsadm -A -t 172.16.11.94:80 -s wrr

# Set Real Server

ipvsadm -a -t 172.16.11.94:80 -r 10.0.0.2:80 -m -w 2

ipvsadm -a -t 172.16.11.94:80 -r 172.16.10.172:80 -m -w 3

ipvsadm

运行ipvsadm ，/usr/local/bin/ipvsadm.sh

ipvsadm 回车

应该查看到如下显示

IP Virtual Server version 1.2.1 (size=4096)

Prot LocalAddressort Scheduler Flags

-> RemoteAddress: Port Forward Weight ActiveConn InActConn

TCP LVS:80 wlc

-> WEB-2:http Masq 1 0 0

TCP LVS:80 wlc

　　　 -> WEB-1:http Masq 1 0 0

　　　安装keepalived

安装KEEPALIVED

cd /tmp/keepalived-1.1.13.tar.gz

在做./configure之前:

先 ln -s /usr/src/kernels/2.6.11-1.1369_FC4-i686/ /usr/src/linux

(这台机器需安装SRC, LVS)

启动Keepalived (/etc/rc.local)

/usr/local/sbin/keepalived -C -D-f /usr/local/etc/keepalived/keepalived.conf

输出在 /var/log/message

keepalived.conf? (‘{‘前,一定要有个空格.)

以下是keepalived.conf的配置：

! Configuration File for keepalivedglobal_defs {

##报警功能

notification_email {

[email protected]

}

notification_email_from [email protected]

smtp_server 172.16.0.3

smtp_connect_timeout 5

lvs_id LVS_MAIN

}

##lvs功能

virtual_server 172.16.11.94 80 {

delay_loop 6 #(每隔6秒查询realserver状态)

lb_algo wlc #(weighted least connection)

persistence_timeout 1800 #(同一IP的连接30分钟内被分配到同一台realserver)

lb_kind NAT #(Direct Route)

protocol TCP #(用TCP协议检查realserver状态)

real_server 10.0.0.2 80 {

weight 1 #(权重)

HTTP_GET {

url {

path /index.html

digest 72d27a59262916d9841d9f6a37e2d3d9

}

connect_timeout 8

nb_get_retry 6

delay_before_retry 3

}

}

real_server 10.0.0.3 80 {

weight 1

HTTP_GET {

url {

path /test.htm

digest c5261ea29cf58bdebe5c3bf3d09051ac

}

connect_timeout 8

nb_get_retry 6

delay_before_retry 3

}

}

}　　

运行 /usr/local/sbin/keepalived -C -D-f /usr/local/etc/keepalived/keepalived.conf

来启动keepalived，通过 查看系统日志返回的参数，获取real server 的

MD5 编码，替换上面配置文件中的MD5 编码

通过上列配置，应该是没有问题的。

keepalived 正常运行后，原来对ipvsadm的配置已经失效了。

原文地址: http://www.linuxtone.org/thread-651-1-1.html