因工作需要搭建
LVS(VIP: 10.0.32.224) 10.0.32.59LVS-Master 10.0.32.65LVS-Backup 10.0.32.84(LVS-tomcat3) 10.0.32.101(LVS-tomcat4)
1、安裝LVS軟件
1.1.查看是否有IPVS模塊
[root@Master~]# modprobe -l | grepipvs kernel/net/netfilter/ipvs/ip_vs.ko kernel/net/netfilter/ipvs/ip_vs_rr.ko kernel/net/netfilter/ipvs/ip_vs_wrr.ko kernel/net/netfilter/ipvs/ip_vs_lc.ko kernel/net/netfilter/ipvs/ip_vs_wlc.ko kernel/net/netfilter/ipvs/ip_vs_lblc.ko kernel/net/netfilter/ipvs/ip_vs_lblcr.ko kernel/net/netfilter/ipvs/ip_vs_dh.ko kernel/net/netfilter/ipvs/ip_vs_sh.ko kernel/net/netfilter/ipvs/ip_vs_sed.ko kernel/net/netfilter/ipvs/ip_vs_nq.ko kernel/net/netfilter/ipvs/ip_vs_ftp.ko kernel/net/netfilter/ipvs/ip_vs_pe_sip.ko
1.2.安裝IPVS管理工具
[root@Master~]# yum-y install ipvsadm
2、安裝keepalived（分別在LVS-Master和LVS-Backup中）
2.1.安裝keepalived並配置。
[root@Master~]# yum -yinstall keepalived（yum安裝keepalived）
[root@Master~]# vi /etc/keepalived/keepalived.conf
!Configuration File for keepalived
global_defs{
notification_email {
[email protected]
[email protected]
[email protected]
}
[email protected]
smtp_server 192.168.200.1 #設置SMTP Server地址
smtp_connect_timeout 30
router_id LVS_DEVEL
}
vrrp_sync_groupLVS_GV1 {
group {
LVS_qingsuan #寫集羣的名字‘LVS_“名字”’，如：清算平臺服務器
}
}
vrrp_instanceLVS_qingsuan{
state MASTER #指定Keepalived的角色，MASTER爲主，BACKUP爲備
interface eth0 #綁定真實的物理網卡
virtual_router_id 51 #虛擬路由編號，主備要一致
priority 100 #定義優先級，數字越大，優先級越高，主DR必須大於備用DR
advert_int 1 #檢查間隔，默認爲1s
authentication {
auth_type PASS
auth_pass qingsuan
}
virtual_ipaddress {
10.0.32.224 #定義虛擬IP(VIP)爲可多設，每行一個
}
}
virtual_server10.0.32.224443 { #定義對外提供服務的LVS的VIP以及port
delay_loop 6 #設置健康檢查時間，單位是秒
lb_algo wlc #設置負載調度的算法爲wlc
lb_kind DR #設置LVS實現負載的機制，有NAT、TUN、DR三個模式,設DR模式
persistence_timeout 50 #會話保持時間，單位爲秒
protocol TCP #指定轉發協議類型，有TCP和UDP兩種
sorry_server 127.0.0.1 80
real_server 10.0.32.84 443 { #指定real server1的IP地址
weight 1 #配置節點權值，數字越大
TCP_CHECK {
connect_timeout 3 #表示3秒無響應，則超時
tcp_port 443
}
}
real_server10.0.32.101 443 { #指定real server2的IP地址
weight 1 #配置節點權值，數字越大
TCP_CHECK {
connect_timeout 3 #表示3秒無響應，則超時
}
}
}2.2.啓動keepalived、設置keepalived服務自啓動，檢查是否生效。
[root@Master~]# /etc/init.d/keepalived start [root@Master~]# chkconfigkeepalived on
3、在LVS-Backup上安裝LVS、keepalived並配置
3.1.安裝LVS、keepalived
[root@Backup~]# yum-y install ipvsadm [root@Backup~]# yum-y install keepalived
3.2.配置LVS-Backup的keepalived
先從LVS－Master把修改過的keepalived配置文件複製過來。
[root@Mastekeepalived]#scpkeepalived.conf [email protected]:/etc/keepalived/ [root@Backup~]# vi /etc/keepalived/keepalived.conf 只修改state爲BACKUP和priority爲90，MASTER爲主機服務器，BACKUP爲備用服務器。 stateBACKUP priority90
3.3.啓動LVS-Backup的keeplived服務，並檢查是否生效。
[root@Backup~]# /etc/init.d/keepalived start [root@Backup~]# chkconfigkeepalived on
5、配置WEB服務器，即real server節點1和2
由於採用的是DR方式調度，Real_Server會以LVS的VIP來直接回復Client，所以需要在Real_Server的lo上開啓LVS的VIP來與Client建立通信
配置web
[root@web~]# vi /etc/init.d/lvs-server＃編輯腳本放到/etc/init.d/下
#!/bin/bash
#chkconfig: 35 85 15
VIP=10.0.32.223
chmod755 /etc/rc.d/init.d/functions
./etc/rc.d/init.d/functions
case"$1" in
start)
echo " start LVS of REALServer"
/sbin/ifconfig lo:0 $VIP broadcast $VIPnetmask 255.255.255.255 up
/sbin/route add -host $VIP dev lo:0
echo "1">/proc/sys/net/ipv4/conf/lo/arp_ignore
echo "2" >/proc/sys/net/ipv4/conf/lo/arp_announce
echo "1">/proc/sys/net/ipv4/conf/all/arp_ignore
echo "2">/proc/sys/net/ipv4/conf/all/arp_announce
sysctl -p >/dev/null 2>&1
;;
stop)
/sbin/ifconfig lo:0 down
echo "close LVS Directorserver"
echo "0">/proc/sys/net/ipv4/conf/lo/arp_ignore
echo "0">/proc/sys/net/ipv4/conf/lo/arp_announce
echo "0">/proc/sys/net/ipv4/conf/all/arp_ignore
echo "0">/proc/sys/net/ipv4/conf/all/arp_announce
;;
*)
echo"Usage: $0 {start|stop}"
exit 1
esac
[root@web~]# chmod 755 /etc/init.d/lvs-server
[root@web~]# /etc/init.d/lvs-server start