【概述】
keepalive是一种高可用反向代理的工具。它最早就是为vrrp存在的。所以它最通用的功能是做vrrp的负载均衡使用的。一般常见的模型主要是单主或多主模型。其区别就是在配置文件的Vrrp定义中，多定义几个主备和优先级。
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【单主模式配置】
【主】
yum install keepalived
vim /etc/keepalived/keepalived.conf
global_defs {
//全局定义notification_email {
//邮件通知acassen@firewall.loc
failover@firewall.loc
sysadmin@firewall.loc
}
notification_email_from Alexandre.Cassen@firewall.loc
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 10
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass londey
}
virtual_ipaddress {
172.16.35.100
}
}
【备】
yum install keepalived
vim /etc/keepalived/keepalived.conf
global_defs {
notification_email {
acassen@firewall.loc
failover@firewall.loc
sysadmin@firewall.loc
}
notification_email_from Alexandre.Cassen@firewall.loc
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 10
priority 95
advert_int 1
authentication {
auth_type PASS
auth_pass londey
}
virtual_ipaddress {
172.16.35.100
}
}
【启】
service keepalived start
【测】
tail -f /var/log/messages
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【双主模式配置】
【主】
yum install keepalived
vim /etc/keepalived/keepalived.conf
global_defs {
notification_email {
acassen@firewall.loc
failover@firewall.loc
sysadmin@firewall.loc
}
notification_email_from Alexandre.Cassen@firewall.loc
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 10
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass londey
}
virtual_ipaddress {
172.16.35.100
}
vrrp_instance VI_2 {
state BACKUP
interface eth0
virtual_router_id 20
priority 95
advert_int 1
authentication {
auth_type PASS
auth_pass liaria
}
virtual_ipaddress {
172.16.35.200
}
}
【备】
yum install keepalived
vim /etc/keepalived/keepalived.conf
global_defs {
notification_email {
acassen@firewall.loc
failover@firewall.loc
sysadmin@firewall.loc
}
notification_email_from Alexandre.Cassen@firewall.loc
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 10
priority 95
advert_int 1
authentication {
auth_type PASS
auth_pass londey
}
virtual_ipaddress {
172.16.35.100
}
vrrp_instance VI_2 {
state MASTER
interface eth0
virtual_router_id 10
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass liaria
}
virtual_ipaddress {
172.16.35.200
}
}
【启】
service keepalived start
【测】
tail -f /var/log/messages