第10天 LVS及双机KEEPALIVED
1.yum install ipvsadm或www.linuxvirtualserver.org下载
2.工作模式：NAT｜TUN｜DR；调度算法：rr,wrr,lc,wlc
3.
DR
ipvsadm -A -t 192.168.8.100:80 -s rr
ipvsadm -A -t 192.168.8.200:80 -s rr -p 60
ipvsadm -a -t 192.168.8.200:80 -r 192.168.8.11:80 -g -w 100
ipvsadm -a -t 192.168.8.200:80 -r 192.168.8.12:80 -g -w 100
ipvsadm -a -t 192.168.8.200:80 -r 192.168.8.13:80 -g -w 100
ipvsadm -d -t 192.168.8.200:80 -r 192.168.8.14:80
写入配置文件 cat /etc/sysconfig/ipvsadm
-A -t 192.168.8.100:80 -s rr
-A -t 192.168.8.200:80 -s rr -p 60
-a -t 192.168.8.200:80 -r 192.168.8.11:80 -g -w 100
-a -t 192.168.8.200:80 -r 192.168.8.12:80 -g -w 100
-a -t 192.168.8.200:80 -r 192.168.8.13:80 -g -w 100
NAT
ip_forward=1
iptables -t nat -A POSTROUTING -s 1.1.1.0/24 -o eth0 -j SNAT --to-source 2.2.2.2
ipvsadm -A -t 192.168.8.150:80 -s rr
ipvsadm -a -t 192.168.8.150:80 -r 172.20.20.20:80 -m -w 20
ipvsadm -a -t 192.168.8.150:80 -r 172.20.20.21:80 -m -w 20
ipvsadm -a -t 192.168.8.150:80 -r 172.20.20.22:80 -m -w 20
4.DR模式，都要关闭VIP共用问题，避免arp解析异常，关闭重定向参数响应
sysctl -w net.ipv4.conf.all.send_redirects=0
sysctl -w net.ipv4.conf.default.send_redirects=0
sysctl -w net.ipv4.conf.em1.send_redirects=0
5.WEB节点REALSERVER服务器
ifconfig lo:0 192.168.8.200 netmask 255.255.255.255
route add -host 192.168.8.200 dev lo:0
sysctl -w net.ipv4.conf.all.arp_ignore=1
sysctl -w net.ipv4.conf.all.arp_announce=2
sysctl -w net.ipv4.conf.default.arp_ignore=1
sysctl -w net.ipv4.conf.default.arp_announce=2
sysctl -w net.ipv4.conf.lo.arp_ignore=1
sysctl -w net.ipv4.conf.lo.arp_announce=2
6. KEEPALVED及LVS双机配置
yum install kernel-devel openssl-devel popt-devel
yum install keepalived或www.keepalived.org
7.
! Configuration File for keepalived
global_defs {
notification_email {
}
notification_email_from [email protected]
smtp_server 192.168.200.1
smtp_connect_timeout 30
router_id webrb1
}
vrrp_instance VI_rb1 {
state MASTER
interface em1
virtual_router_id 51
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 11112222
}
virtual_ipaddress {
192.168.8.100
192.168.8.200
}
}
8.
! Configuration File for keepalived
global_defs {
notification_email {
}
notification_email_from [email protected]
smtp_server 192.168.200.1
smtp_connect_timeout 30
router_id webrb2
}
vrrp_instance VI_rb1 {
state BACKUP
interface em1
virtual_router_id 51
priority 90
advert_int 1
authentication {
auth_type PASS
auth_pass 11112222
}
virtual_ipaddress {
192.168.8.100
192.168.8.200
}
}
9.
分别启动服务
service keepalived restart
10.查看IP效果
第1台: em1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000
link/ether 90:b1:1c:11:98:ef brd ff:ff:ff:ff:ff:ff
inet 172.22.2.180/24 brd 172.22.2.255 scope global em1
inet 192.168.8.100/32 scope global em1
inet 192.168.8.200/32 scope global em1
inet6 fe80::92b1:1cff:fe11:98ef/64 scope link
valid_lft forever preferred_lft forever
第2台：
em1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000
link/ether 90:b1:1c:0e:97:1a brd ff:ff:ff:ff:ff:ff
inet 172.22.2.181/24 brd 172.22.2.255 scope global em1
inet6 fe80::92b1:1cff:fe0e:971a/64 scope link
valid_lft forever preferred_lft forever
Aug 27 13:11:22 cecgw-zs-cdb01 Keepalived[641]: Stopping Keepalived v1.2.7 (02/21,2013)
Aug 27 13:11:22 cecgw-zs-cdb01 Keepalived_vrrp[643]: VRRP_Instance(VI_rb1) sending 0 priority
Aug 27 13:11:22 cecgw-zs-cdb01 Keepalived_vrrp[643]: VRRP_Instance(VI_rb1) removing protocol VIPs.
Aug 27 13:11:22 cecgw-zs-cdb01 avahi-daemon[9028]: Withdrawing address record for 192.168.8.100 on em1.
Aug 27 13:11:22 cecgw-zs-cdb01 avahi-daemon[9028]: Withdrawing address record for 192.168.8.200 on em1.
Aug 27 13:11:24 cecgw-zs-cdb02 Keepalived_vrrp[30334]: VRRP_Instance(VI_rb1) Entering MASTER STATE
Aug 27 13:11:24 cecgw-zs-cdb02 Keepalived_vrrp[30334]: VRRP_Instance(VI_rb1) setting protocol VIPs.
Aug 27 13:11:24 cecgw-zs-cdb02 Keepalived_vrrp[30334]: VRRP_Instance(VI_rb1) Sending gratuitous ARPs on em1 for 192.168.8.100
Aug 27 13:11:24 cecgw-zs-cdb02 Keepalived_vrrp[30334]: VRRP_Instance(VI_rb1) Sending gratuitous ARPs on em1 for 192.168.8.200
Aug 27 13:11:24 cecgw-zs-cdb02 avahi-daemon[1806]: Registering new address record for 192.168.8.100 on em1.IPv4.
Aug 27 13:11:24 cecgw-zs-cdb02 avahi-daemon[1806]: Registering new address record for 192.168.8.200 on em1.IPv4.
Aug 27 13:11:24 cecgw-zs-cdb02 Keepalived_healthcheckers[30333]: Netlink reflector reports IP 192.168.8.100 added
Aug 27 13:11:24 cecgw-zs-cdb02 Keepalived_healthcheckers[30333]: Netlink reflector reports IP 192.168.8.200 added
Aug 27 13:11:29 cecgw-zs-cdb02 Keepalived_vrrp[30334]: VRRP_Instance(VI_rb1) Sending gratuitous ARPs on em1 for 192.168.8.100
Aug 27 13:11:29 cecgw-zs-cdb02 Keepalived_vrrp[30334]: VRRP_Instance(VI_rb1) Sending gratuitous ARPs on em1 for 192.168.8.200
11.KEEPALIVED配置LVS
去除/etc/sysconfig/ipvsadm
vi /etc/keepalived/keepalived.conf
主
! Configuration File for keepalived
global_defs {
notification_email {
}
notification_email_from [email protected]
smtp_server 192.168.200.1
smtp_connect_timeout 30
router_id webrb1
}
vrrp_instance VI_rb1 {
state MASTER
interface em1
virtual_router_id 51
priority 100
advert_int 10
authentication {
auth_type PASS
auth_pass 11112222
}
virtual_ipaddress {
192.168.8.100
192.168.8.200/24
}
virtual_server 192.168.8.200 80 {
delay_loop 2
lb_algo wrr
lb_kind DR
persistence_timeout 60
protocol TCP
real_server 192.168.8.11 80 {
weight 100
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
}
}
real_server 192.168.8.12 80 {
weight 100
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
}
}
real_server 192.168.8.13 80 {
weight 100
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
}
}
}
备
! Configuration File for keepalived
global_defs {
notification_email {
}
notification_email_from [email protected]
smtp_server 192.168.200.1
smtp_connect_timeout 30
router_id webrb2
}
vrrp_instance VI_rb1 {
state BACKUP
interface em1
virtual_router_id 51
priority 90
advert_int 10
authentication {
auth_type PASS
auth_pass 11112222
}
virtual_ipaddress {
192.168.8.100
192.168.8.200
}
}
virtual_server 192.168.8.200 80 {
delay_loop 2
lb_algo wrr
lb_kind DR
persistence_timeout 60
protocol TCP
real_server 192.168.8.11 80 {
weight 100
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
}
}
real_server 192.168.8.12 80 {
weight 100
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
}
}
real_server 192.168.8.13 80 {
weight 100
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
}
}
}
下面下载完整KEEPALIED+LVS操作步骤资料
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