nginx + keepalive 实现HA

 

keepalived+nginx实现 HA与负载均衡中keepalived负责实现HA功能，控制VIP(虚拟网络地址)转移功能，nginx实现对realserver七层负载均衡功能，nginx提供代理服务和cache功能，DNS服务可以负责前段VIP的负载均衡。

keepalived的配置
192.168.200.1 keepalived配置
! Configuration File for keepalived

global_defs {
notification_email {
[email protected]
}
notification_email_from [email protected]
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id LVS_TEST_YDQ
}

vrrp_instance VI_1 {
state MASTER
interface eth0
virtual_router_id 61
priority 150
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.200.101/24 dev eth0 label eth0:0
}
}

vrrp_instance VI_2 {
state BACKUP
interface eth0
virtual_router_id 62
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 2222
}
virtual_ipaddress {
192.168.200.102/24 dev eth0 label eth0:1
}
}

vrrp_instance VI_3 {
state BACKUP
interface eth0
virtual_router_id 63
priority 50
advert_int 1
authentication {
auth_type PASS
auth_pass 3333
}
virtual_ipaddress {
192.168.200.103/24 dev eth0 label eth0:1
}
}