CentOS6.4环境下布署LVS+keepalived笔记
环境：1.CentOS 6.4
2.ipvsadm 1.2.4
3.keepalived 1.1.17
在安装之前需要做些准备公司，查看kernel-devel是否安装.之前由于这个没有装，导致keepalived没有与内核结合，在ipvsadm -ln 就无法看到lvs信息。
安装步骤：
#wget http://www.linuxvirtualserver.org/software/kernel-2.6/ipvsadm-1.24.tar.gz
#wget http://www.keepalived.org/software/keepalived-1.1.17.tar.gz
#ln -s /usr/src/kernels/2.6.18-194.el5-x86_64/ /usr/src/linux
# tar -zxvf ipvsadm-1.24.tar.gz
# cd ipvsadm-1.24
# make;make install
# cd ..
# tar -zxvf keepalived-1.1.17.tar.gz
# cd keepalived-1.1.17
# ./configure
configure: error:
!!! OpenSSL is not properly installed on your system. !!!
!!! Can not include OpenSSL headers files.
解决办法：
# yum -y install openssl-devel
# ./configure
# make;make install
编译的时候出现这个提示，说明keepalived和内核结合了，如果不是这样的，需要加上这个参数./configure --with-kernel-
dir=/kernel/path
Keepalived configuration
------------------------
Keepalived version : 1.1.17
Compiler : gcc
Compiler flags : -g -O2
Extra Lib : -lpopt -lssl -lcrypto
Use IPVS Framework : Yes
IPVS sync daemon support : Yes
Use VRRP Framework : Yes
Use LinkWatch : No
Use Debug flags : No
安装完之后keepalived的配置：
#cp /usr/local/etc/rc.d/init.d/keepalived /etc/rc.d/init.d/
#cp /usr/local/etc/sysconfig/keepalived /etc/sysconfig/
#mkdir /etc/keepalived
#cp /usr/local/sbin/keepalived /usr/sbin/
#vi /etc/keepalived/keepalived.conf
!Configuration File for keepalived
#lvs出故障报警。
global_defs {
notification_email {
sa@fminutes.com
}
notification_email_from defage@163.com
smtp_server smtp.163.com
smtp_connect_timeout 30
router_id LVS_DEVEL
}
vrrp_instance VI_1 {
state MASTER #备份服务器上将MASTER改为BACKUP
nopreempt
interface eth0
virtual_router_id 51
priority 100 # 备份服务上将100改为99
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.0.104
#(如果有多个VIP，继续换行填写.)
}
}
virtual_server 192.168.0.104 80 {
delay_loop 6 #(每隔10秒查询realserver状态)
lb_algo wrr #(lvs 算法)
lb_kind DR #(Direct Route)
persistence_timeout 30 #(同一IP的连接60秒内被分配到同一台realserver)
protocol TCP #(用TCP协议检查realserver状态)
real_server 192.168.2.137 80 {
weight 8 #(权重)
TCP_CHECK {
connect_timeout 10 #(10秒无响应超时)
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
}
如果需要添加vip或者更改lvs信息，只需要编辑/etc/keepalived/keepalived.conf即可。
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