keepalived安装笔记(非原创)
1、先安装kernel和openssl组件。注意安装kernel后要创建软连接#kernel-devel
yum install kernel-devel
#openssl-devel
yum install openssl-devel
#create slink from kernels
ln -sv /usr/src/kernels/2.6.18-194.el5-i686/ /usr/src/linux
2、在每台服务器上安装keepalived-1.2.1
#keepalived-1.2.1.tar.gz
wget http://www.keepalived.org/software/keepalived-1.2.1.tar.gz
tar –zxvf keepalived-1.2.1.tar.gz
cd keepalived-1.2.1
./configure
#check configure. You must see that:
# Use IPVS Framework : Yes
# PVS sync daemon support : Yes
# Use VRRP Framework : Yes
make
make install
cp /usr/local/etc/sysconfig/keepalived /etc/sysconfig/keepalived
cp /usr/local/sbin/keepalived /usr/sbin/keepalived
cp /usr/local/etc/rc.d/init.d/keepalived /etc/init.d/keepalived
#keepalived.conf
mkdir /etc/keepalived
#keepalived.conf default configure
cp /usr/local/etc/keepalived/samples/keepalived.conf.virtualhost /etc/keepalived/keepalived.conf
3、编辑/etc/keepalived/keepalived.conf
注意一下配置
virtual_ipaddress ，虚拟IP列表
virtual_server，虚拟主机
real_server，真实主机
lb_algo，负载均衡算法
state，主机状态，MASTER是主，BACKUP是从
#vim /etc/keepalived/keepalived.conf
global_defs {
notification_email {
xxx@yyy.cn
}
notification_email_from{
xxx@yyy.cn
}
smtp_server 127.0.0.1
#smtp_connect_timeout 30
router_id LVS_DEVEL
}
vrrp_instance VI_1 {
state MASTER #121 set MASTER, 122 & 123 set BACKUP.
interface eth0
virtual_router_id 51
priority 100
advert_int 1
authentication {
auth_type mongo
auth_pass 1111
}
virtual_ipaddress {
172.17.0.124
}
}
virtual_server 172.17.0.124 30000 {
delay_loop 6
lb_algo wrr #wrr or wlc
lb_kind DR
persistence_timeout 60
protocol TCP
#virtualhost www.firewall.loc # The VirtualHost string to use
# in the GET query.
real_server 172.17.0.121 30000 {
weight 5
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_port 30000
}
}
real_server 172.17.0.122 30000 {
weight 4
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_port 30000
}
}
real_server 172.17.0.123 30000 {
weight 4
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_port 30000
}
}
}
4、启动keepalived服务：/sbin/service keepalived start
可以查看日志 tail /var/log/message
5、狗日的ipvsadm运行不稳定，时常挂，我就不写了
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