lvs三種工作模式：NAT（地址轉(zhuǎn)換）IP Tunneling（隧道）DR（直接路由）
DR:
1.檢查是否安裝ipvs模塊
# lsmod | grep ip_vs
# yum install -y ipvsadm
1.1 install ipvsadm Download ipvsadm-1.24.tar.gz?? http://www.linuxvirtualserver.org/software/kernel-2.6/ipvsadm-1.24.tar.gz??? //安裝ipvsadm需要安裝gcc包
# tar zxvf ipvsadm-1.24.tar.gz
# ln -s /usr/src/kernels/2.6.18-53.el5-i686 /usr/src/linux
# ls -l /usr/src/
total 16
drwxr-xr-x 3 root root 4096 Jun 24 17:28 kernels
lrwxrwxrwx 1 root root 35 Aug 3 18:35 linux -> /usr/src/kernels/2.6.18-53.el5-i686 ?//*ipvsadm安裝不成功,2.6.18的link指向/usr/src/kernels/2.6.18-398.el5-x86_64根據(jù)實(shí)際情況改動(dòng), kernel.x86_64 kernel-devel.x86_64 kernel-headers.x86_643個(gè)包文件得具備
drwxr-xr-x 7 root root 4096 Jun 24 17:27 redhat
#cd ipvsadm-1.24
[ipvsadm-1.24]# make && make install
2.配置LVS負(fù)載均衡
ipvsadm -C????????????? //清除當(dāng)前所有LVS規(guī)則
ipvsadm --set 30 5 60???????????? //設(shè)置tcp、tcpfin、udp鏈接超時(shí)時(shí)間
ipvsadm -A -t 10.0.0.3:80 -s rr（輪詢） -p 20????????? //添加虛擬服務(wù)（-A），-t指定VIP加端口，-s調(diào)度算法，-p會(huì)話保持
ipvsadm -a -t 10.0.0.3:80 -r 10.0.0.7:80 -g?? //將虛擬服務(wù)關(guān)聯(lián)到真實(shí)服務(wù)上（-a），-g DR模式
3.開啟路由轉(zhuǎn)發(fā)
# vi /etc/sysctl.conf
net.ipv4.ip_forward = 1???????? //此參數(shù)改為1
# sysctl -p?????????????????????????????// 使修改生效
4.安裝keepalived
Download keepalived-1.1.15.tar.gz???? //依賴openssl
http://www.keepalived.org/software/keepalived-1.1.15.tar.gz
# tar zxvf keepalived-1.1.15.tar.gz
# cd keepalived-1.1.15
# ./configure?????????????????????????????????????????? //
……………省略……………………………………
Keepalived configuration
------------------------
?Keepalived version : 1.1.15
Compiler : gcc
Compiler flags : -g -O2
Extra Lib : -lpopt -lssl -lcrypto
Use IPVS Framework : Yes????????? //提示YES，安裝成功???????????????????
IPVS sync daemon support : Yes???? //提示YES，安裝成功
Use VRRP Framework : Yes?????????? //提示YES，安裝成功
Use LinkWatch : No
Use Debug flags : No
……………結(jié)束……………………………………
# make && make install
5.配置keepalived
# vi /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
?????? notification_email {
????????????? xxx@xxx.com????????? //配置郵箱
}
notification_email_from lvs1@xxx.com????? //定義虛擬發(fā)件郵箱名
smtp_server 10.232.xx.xxx???????????????? //配置郵件服務(wù)器
smtp_connect_timeout 60
router_id? LVS_LEVEL
}
vrrp_instance VI_1 {
?????????? state MASTER
???????????interface eth0
?????????? virtual_router_id 90
??????????priority 200
????????? advert_int 1
????????? authentication {
??????????????? auth_type PASS
????????????????auth_pass 1111
??? ?}
???????????virtual_ipaddress {
??????????????????? $VIP/24
?? ?}
?}
?virtual_server $VIP 80{
???????? ?delay_loop 6
??????????lb_algo rr??????????? //指定輪詢模式
????????? lb_kind DR???????? //DR模式
????????? persistence_timeout 50
????????? protocol TCP
???????? real_server 10.23x.1xx.11 80{
??????????????? weight 50
??????????????? TCP_CHECK {
???????????????????????????? connect_timeout 10
???????????????????????????? nb_get_retry 3
???????????????????????????? delay_before_retry 5
????????????????? }
??????? }?
?}
5.1 COPY keepalive to services
cp /usr/local/etc/rc.d/init.d/keepalived /etc/rc.d/init.d/
cp /usr/local/etc/sysconfig/keepalived /etc/sysconfig/
mkdir /etc/keepalived
cp /usr/local/etc/keepalived/keepalived.conf /etc/keepalived/
cp /usr/local/sbin/keepalived /usr/sbin/
這樣就可以用 service keepalived start|stop來管理keepalived
5.2 Set keepalived auto start/stop when SYSTEM start/stop
ln -s /etc/init.d/keepalived /etc/rc0.d/K79keepalived
ln -s /etc/init.d/keepalived /etc/rc1.d/K79keepalived
ln -s /etc/init.d/keepalived /etc/rc2.d/K79keepalived
ln -s /etc/init.d/keepalived /etc/rc3.d/K79keepalived
ln -s /etc/init.d/keepalived /etc/rc4.d/K79keepalived
ln -s /etc/init.d/keepalived /etc/rc6.d/K79keepalived
ln -s /etc/init.d/keepalived /etc/rc5.d/S21keepalived
6.配置realserver
＃vim /etc/sysctl.conf
net.ipv4.ip_forward = 1
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
# ifconfig lo:0 $VIP netmask 255.255.255.255 broadcast $VIP up
# /sbin/route add -host $VIP dev lo:0
7.測(cè)試
# ipvsadm? -Ln
