二、Load Balancer2(LVS-Slave)配置(RHEL6)
1) 设置网卡IP地址
[root@localhost ~]# vim /etc/sysconfig/network-scripts/ifcfg-eth0
# Advanced Micro Devices [AMD] 79c970 [PCnet32 LANCE]
DEVICE=eth0
BOOTPROTO=static
HWADDR=00:0C:29:AB:B0:02
ONBOOT=yes
IPADDR=192.168.1.197
NETMASK=255.255.255.0
GATEWAY=192.168.1.1
2)安装支持软件
[root@localhost ~]# mount /dev/cdrom /media/
mount: block device /dev/sr0 is write-protected, mounting read-only
[root@localhost media]# vim /etc/yum.repos.d/rhel-source.repo
[rhel-source]
name=Red Hat Enterprise Linux $releasever - $basearch - Source
baseurl=file:///media/Server
enabled=1
gpgcheck=0
[root@localhost media]# yum -y install kernel-devel openssl-devel popt-devel ipvsadm
3) 安装keepalived所需软件
[root@localhost ~]# tar zxf keepalived-1.2.2.tar.gz
[root@localhost ~]# cd keepalived-1.2.2
[root@localhost keepalived-1.2.2]# ./configure --prefix=/ --with-kernel-dir=/usr/src/kernels/2.6.18-194.el5-i686 ;make ;make install //此内核是RHEL6上的,若使用其它RHEL版本则会报错
4)使用keepalived服务
[root@localhost ~]# ls -l /etc/init.d/keepalived
-rwxr-xr-x. 1 root root 1288 5月 10 14:27 /etc/init.d/keepalived
[root@localhost ~]# chkconfig --add keepalived
[root@localhost ~]# chkconfig keepalived
5)配置/etc/keepalived/keepalived.conf主配置文档,将LVS-Master上的配置文件拷过来修改如下三个参数即可
[root@localhost keepalived]# scp keepalived.conf root@192.168.1.197:/etc/keepalived/此步骤在LVS-Master上做,向197辅助服务器拷贝 //
[root@localhost ~]# cd /etc/keepalived/ //回到LVS-Slave上编辑
[root@localhost keepalived]# cp keepalived.conf keepalived.conf.bak
[root@localhost keepalived]# vi keepalived.conf
global_defs {
router_id LVS_DEVEL_2 //本路由器(服务器)的名称
}
vrrp_instance VI_1 { //定义vrrp热备实例
state SLAVE //热本状态,MASTER表示主服务器
interface eth0 //承载vip的物理端口
virtual_router_id 51 //虚拟路由器的ID号,每个热备组保持一致
priority 100 //优先级,数值越大优先级越高,这里应该主服务器高于辅助的
advert_int 1 //通告间隔秒数(心跳频率)
authentication { //认证信息,每个热备组保持一致
auth_type PASS //认证类型
auth_pass 1111 //认证密码
}
virtual_ipaddress { //指定漂移地址(vip),可以有多个
192.168.1.198
}
}
virtual_server 192.168.1.198 80 { //虚拟服务器地址(vip)、端口
delay_loop 6 //健康检查间隔时间
lb_algo rr //轮询(rr)调度算法
lb_kind DR //直接路由模式(DR)
protocol TCP //应用服务采用的模式是TCP模式
real_server 192.168.1.191 80 { //第一个Web节点的地址、端口
weight 1 //节点的权重
TCP-CHECK { //健康检查方式
connect_timeout 3 //连接超时(秒)
nb_get_retry 3 //重试次数
delay_before_retry 3 //重试间隔(秒)
connect_port 80 //检查的目标端口
}
}
real_server 192.168.1.192 80 { //第二个Web节点
weight 1
TCP-CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
}
6)重新启动keepalived服务
[root@localhost keepalived]# service keepalived restart
停止 keepalived: [失败]
正在启动 keepalived: [确定]
[root@localhost keepalived]#ip add show dev eth0