keepalived双主模型实现高可用ipvs的简单案例
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案例拓扑图
说明：
主机操作系统为：CentOS-6.5-x86_64
准备工作
安装keepalived和ipvsadm
在IP地址为10.170.2.60和10.170.2.61两台主机上安装keepalived和ipvsadm
# yum -y install keepalived # yum -y install ipvsadm
安装httpd
在IP地址为10.170.2.101和10.170.2.102两台主机上安装httpd
默认情况下，系统已经安装了httpd服务
配置keepalived1
# cd /etc/keepalived/ # cp keepalived.conf keepalived.conf.bak
[root@kha1 keepalived]# vim keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
[email protected]
[email protected]
[email protected]
}
notification_email_from [email protected]
smtp_server 192.168.200.1
smtp_connect_timeout 30
router_id LVS_DEVEL
}
vrrp_instance VI_1 {
state BACKUP
interface eth0
virtual_router_id 15
priority 99
advert_int 1
authentication {
auth_type PASS
auth_pass 111111
}
virtual_ipaddress {
10.170.2.100
}
}
vrrp_instance VI_2 {
state MASTER
interface eth0
virtual_router_id 115
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 222222
}
virtual_ipaddress {
10.170.2.200
}
}
virtual_server 10.170.2.100 80 {
delay_loop 6
lb_algo rr
lb_kind DR
nat_mask 255.255.252.0
persistence_timeout 0
protocol TCP
real_server 10.170.2.101 80 {
weight 1
HTTP_GET {
url {
path /
status_code 200
}
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
real_server 10.170.2.102 80 {
weight 1
HTTP_GET {
url {
path /
status_code 200
}
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
}
virtual_server 10.170.2.200 80 {
delay_loop 6
lb_algo rr
lb_kind DR
nat_mask 255.255.252.0
persistence_timeout 0
protocol TCP
real_server 10.170.2.101 80 {
weight 1
HTTP_GET {
url {
path /
status_code 200
}
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
real_server 10.170.2.102 80 {
weight 1
HTTP_GET {
url {
path /
status_code 200
}
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
}
配置keepalived2
# cd /etc/keepalived/ # cp keepalived.conf keepalived.conf.bak
[root@kha1 keepalived]# vim keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
[email protected]
[email protected]
[email protected]
}
notification_email_from [email protected]
smtp_server 192.168.200.1
smtp_connect_timeout 30
router_id LVS_DEVEL
}
vrrp_instance VI_1 {
state MASTER
interface eth0
virtual_router_id 15
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 111111
}
virtual_ipaddress {
10.170.2.100
}
}
vrrp_instance VI_2 {
state BACKUP
interface eth0
virtual_router_id 115
priority 99
advert_int 1
authentication {
auth_type PASS
auth_pass 222222
}
virtual_ipaddress {
10.170.2.200
}
}
virtual_server 10.170.2.100 80 {
delay_loop 6
lb_algo rr
lb_kind DR
nat_mask 255.255.252.0
persistence_timeout 0
protocol TCP
real_server 10.170.2.101 80 {
weight 1
HTTP_GET {
url {
path /
status_code 200
}
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
real_server 10.170.2.102 80 {
weight 1
HTTP_GET {
url {
path /
status_code 200
}
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
}
virtual_server 10.170.2.200 80 {
delay_loop 6
lb_algo rr
lb_kind DR
nat_mask 255.255.252.0
persistence_timeout 0
protocol TCP
real_server 10.170.2.101 80 {
weight 1
HTTP_GET {
url {
path /
status_code 200
}
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
real_server 10.170.2.102 80 {
weight 1
HTTP_GET {
url {
path /
status_code 200
}
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
}
配置web1
# echo 1 > /proc/sys/net/ipv4/conf/all/arp_ignore # echo 1 > /proc/sys/net/ipv4/conf/eth0/arp_ignore # echo 2 > /proc/sys/net/ipv4/conf/eth0/arp_announce # echo 2 > /proc/sys/net/ipv4/conf/all/arp_announce # ifconfig lo:0 10.170.2.100 netmask 255.255.255.255 broadcast 10.170.2.100 up # route add -host 10.170.2.100 dev lo:0 # ifconfig lo:1 10.170.2.200 netmask 255.255.255.255 broadcast 10.170.2.200 up # route add -host 10.170.2.200 dev lo:1
编辑测试页面
# vim /var/www/html/index.html 内容为：<h1>www1.muluhe.com</h1>
启动httpd服务
# /etc/init.d/httpd start
配置web2
# echo 1 > /proc/sys/net/ipv4/conf/all/arp_ignore # echo 1 > /proc/sys/net/ipv4/conf/eth0/arp_ignore # echo 2 > /proc/sys/net/ipv4/conf/eth0/arp_announce # echo 2 > /proc/sys/net/ipv4/conf/all/arp_announce # ifconfig lo:0 10.170.2.100 netmask 255.255.255.255 broadcast 10.170.2.100 up # route add -host 10.170.2.100 dev lo:0 # ifconfig lo:1 10.170.2.200 netmask 255.255.255.255 broadcast 10.170.2.200 up # route add -host 10.170.2.200 dev lo:1
编辑测试页面
# vim /var/www/html/index.html 内容为：<h1>www2.muluhe.com</h1>
启动httpd服务
# /etc/init.d/httpd start
启动keepalived服务并进行测试
启动keepalived1和keepalived2两台主机的keepalived服务
# /etc/init.d/keepalived start
打开浏览器，键入10.170.2.100，并刷新几下，然后在两台keepalived主机上进行测试
可分别得到如下结果
[root@kha1 keepalived]# ipvsadm -L -n IP Virtual Server version 1.2.1 (size=4096) Prot LocalAddress:Port Scheduler Flags -> RemoteAddress:Port Forward Weight ActiveConn InActConn TCP 10.170.2.100:80 rr -> 10.170.2.101:80 Route 1 0 7 -> 10.170.2.102:80 Route 1 1 7 TCP 10.170.2.200:80 rr -> 10.170.2.101:80 Route 1 0 0 -> 10.170.2.102:80 Route 1 0 0
[root@kha2 keepalived]# ipvsadm -L -n IP Virtual Server version 1.2.1 (size=4096) Prot LocalAddress:Port Scheduler Flags -> RemoteAddress:Port Forward Weight ActiveConn InActConn TCP 10.170.2.100:80 rr -> 10.170.2.101:80 Route 1 0 0 -> 10.170.2.102:80 Route 1 0 0 TCP 10.170.2.200:80 rr -> 10.170.2.101:80 Route 1 0 0 -> 10.170.2.102:80 Route 1 0 0
打开浏览器，键入10.170.2.200，并刷新几下，然后在两台keepalived主机上进行测试
可分别得到如下结果
[root@kha1 keepalived]# ipvsadm -L -n IP Virtual Server version 1.2.1 (size=4096) Prot LocalAddress:Port Scheduler Flags -> RemoteAddress:Port Forward Weight ActiveConn InActConn TCP 10.170.2.100:80 rr -> 10.170.2.101:80 Route 1 0 0 -> 10.170.2.102:80 Route 1 0 0 TCP 10.170.2.200:80 rr -> 10.170.2.101:80 Route 1 0 0 -> 10.170.2.102:80 Route 1 0 0
[root@kha2 keepalived]# ipvsadm -L -n IP Virtual Server version 1.2.1 (size=4096) Prot LocalAddress:Port Scheduler Flags -> RemoteAddress:Port Forward Weight ActiveConn InActConn TCP 10.170.2.100:80 rr -> 10.170.2.101:80 Route 1 0 0 -> 10.170.2.102:80 Route 1 0 0 TCP 10.170.2.200:80 rr -> 10.170.2.101:80 Route 1 0 7 -> 10.170.2.102:80 Route 1 1 7
停止keepalived1主机的keepalived服务，打开浏览器，分别键入10.170.2.100和10.170.2.200并刷新几下，然后在两台keepalived主机上进行测试
可分别得到如下结果
[root@kha1 keepalived]# ipvsadm -L -n IP Virtual Server version 1.2.1 (size=4096) Prot LocalAddress:Port Scheduler Flags -> RemoteAddress:Port Forward Weight ActiveConn InActConn
[root@kha2 keepalived]# ipvsadm -L -n IP Virtual Server version 1.2.1 (size=4096) Prot LocalAddress:Port Scheduler Flags -> RemoteAddress:Port Forward Weight ActiveConn InActConn TCP 10.170.2.100:80 rr -> 10.170.2.101:80 Route 1 0 5 -> 10.170.2.102:80 Route 1 0 6 TCP 10.170.2.200:80 rr -> 10.170.2.101:80 Route 1 0 6 -> 10.170.2.102:80 Route 1 0 5