ipsvadm 配置一：安装配置 LVS+DR+Keepalivedclient 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.el51.下载所需要的软件：ipvsadm keepalivedwget 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.rpmwget http://www.keepalived.org/software/keepalived-1.1.18.tar.gz2.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.gzcd keepalived-1.1.18./configure –prefix=/usr/local/keepalivedmake make installcp /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/keepalivedcp /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/cp /usr/local/keepalived/sbin/keepalived /usr/sbin/启动keepalivedservice keepalived start|stop|restart
4.配置master和backupA．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1B．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 keepalivedglobal_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:0DEVICE=lo:0IPADDR=192.168.133.100NETMASK=255.255.255.255ONBOOT=yesNAME=loopback重启网卡，启动keepalived 显示如下成功！ service network restart service keepalived restart
当爱丽思丢失了通往仙境的钥匙，
