linux LVS （keepalived+ipvsadm）负载均衡搭建 一
ipsvadm 配置一：安装配置 LVS+DR+Keepalived
client 访问的地址 VIP 192.168.133.100
负载服务器master真实IP 192.168.133.128
负载服务器backup真实IP 192.168.133.150
负载服务器虚拟IP 192.168.133.100
后端WEB服务器IP 192.168.133.128
后端WEB服务器IP 192.168.133.150
系统：Redhat 5.4 x86 内核：2.6.18-164.el5
1.下载所需要的软件：ipvsadm keepalived
wget http://www.linuxvirtualserver.org/software/kernel-2.6/ipvsadm-1.24.tar.gz 我这里是直接安装的RHEL4.0自带的ipvsadm-1.24-6.i386.rpm
wget http://www.keepalived.org/software/keepalived-1.1.18.tar.gz
2.安装ipvsadm(负载均衡器都要配置master和backup)
从Linux内核版本2.6起，ip_vs code已经被整合进了内核中，因此，只要在编译内核的时候选择了ipvs的功能，您的Linux即能支持LVS。Linux 2.4.23以后的内核版本也整合了ip_vs code，但如 果是更旧的内核版本，您得自己手动将ip_vs code整合进内核原码中，并重新编译内核方可使用lvs。
我使用的RHEL4.0这个版本支持ipvsadm，所以无需更改内核配置rpm -ivh ipvsadm-1.24-6.i386.rpm
然后使用ipvsadm -v
ipvsadm v1.24 2005/12/10 (compiled with popt and IPVS v1.2.1)
则Ipvsadm安装成功
3.安装keepalived负载均衡器都要配置master和backup)以下建议完全参照，否则会有一些问题
tar zxvf keepalived-1.1.18tar.gz
cd keepalived-1.1.18
./configure --prefix=/usr/local/keepalived
make
make install
cp /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/rc.d/init.d/
cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/
mkdir /etc/keepalived
cp /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/
cp /usr/local/keepalived/sbin/keepalived /usr/sbin/
启动keepalived
service keepalived start|stop|restart
4.配置master和backup
A．开启ip_forward 转发功能：
echo 1 >/proc/sys/net/ipv4/ip_forward 默认是0，关闭ip转发；这里需要开启，所以设置值为1
B．配置keepalived.conf 配置文件 （backup 192.168.133.150）
! Configuration File for keepalived
global_defs {
notification_email {
acassen@firewall.loc
failover@firewall.loc
sysadmin@firewall.loc
}
notification_email_from Alexandre.Cassen@firewall.loc
smtp_server 192.168.133.128
smtp_connect_timeout 30
router_id LVS_DEVEL
}
vrrp_instance VI_1 { #配置负载均衡器的 主和备 ，并做相关设置
state BACKUP #备份服务器上将MASTER改为BACKUP
interface eth0 #HA监测网络接口
virtual_router_id 51 #主、备机的virtual_router_id必须相同
priority 100 #主、备机取不同的优先级，主机值较大，备份机值较小
advert_int 1 #VRRP Multicast广播周期秒数
authentication {
auth_type PASS #VRRP认证方式
auth_pass 1111 #VRRP口令字
}
virtual_ipaddress {
192.168.133.100 #(如果有多个VIP，继续换行填写.)
}
}
virtual_server 192.168.133.100 80 { VIP设置
delay_loop 2 #每隔2秒查询realserver状态
lb_algo rr #lvs 算法
lb_kind DR #Direct Route
nat_mask 255.255.255.0
persistence_timeout 50 #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 192.168.133.128 80 { 真实主机1配置
weight 100 #设置后台主机的权重
TCP_CHECK { #TCP协议检查
connect_timeout 3 #
nb_get_retry 3 #
delay_before_retry 3 #
}
}
real_server 192.168.133.150 80{ 真实主机2配置
weight 1 #设置后台主机的权重
TCP_CHECK { #TCP协议检查
connect_timeout 3 #
nb_get_retry 3 #
delay_before_retry 3 #
}
}
}
配置keepalived.conf 配置文件 （master 192.168.133.128）
! Configuration File for keepalived
global_defs {
notification_email {
acassen@firewall.loc
failover@firewall.loc
sysadmin@firewall.loc
}
notification_email_from Alexandre.Cassen@firewall.loc
smtp_server 192.168.133.128
smtp_connect_timeout 30
router_id LVS_DEVEL
}
vrrp_instance VI_1 {
state MASTER
interface eth0
virtual_router_id 51
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.133.100
}
}
virtual_server 192.168.133.100 80 {
delay_loop 2
lb_algo rr
lb_kind DR
nat_mask 255.255.255.0
persistence_timeout 50
protocol TCP
real_server 192.168.133.128 80 {
weight 100
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
real_server 192.168.133.150 80 {
weight 1
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
}
5.配置 VIP: master 配置一下就可以
vim /etc/sysconfig/network-scripts/ifcfg-lo:0
DEVICE=lo:0
IPADDR=192.168.133.100
NETMASK=255.255.255.255
ONBOOT=yes
NAME=loopback
重启网卡，启动keepalived 显示如下成功！
service network restart
service keepalived restart
页:
[1]