nginx+keepalived双主负载均衡
环境请看 〉〉Nginx+keepalived主备切换_2主要区别如下：
//蓝色与红色仔细观察
192.168.10.1主服务器的keepalived配置
! Configuration File for keepalived
global_defs {
notification_email {
Xxx@qq.com
}
notification_email_from Keepalived@chtopnet.com
smtp_server 127.0.0.1
smtp_connect_timeout 30
}
vrrp_script chk_http_port {
script "/etc/keepalived/chk_nginx_pid.sh"
interval 2
weight 2
}
vrrp_instance VI_1 {
state MASTER
interface eth0
virtual_router_id 51 //VI_2 为 52
priority 100 //备用是99
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
track_script {
chk_http_port
}
virtual_ipaddress {
192.168.10.6 //VIP 1
}
}
vrrp_instance VI_2 {
state BACKUP
interface eth0
virtual_router_id 52 // VI_1 是51
priority 99 //主是100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
track_script {
chk_http_port
}
virtual_ipaddress {
192.168.10.5 //VIP 2
}
}
192.168.10.2主服务器的keepalived配置
! Configuration File for keepalived
global_defs {
notification_email {
Xxx@qq.com
}
notification_email_from Keepalived@chtopnet.com
smtp_server 127.0.0.1
smtp_connect_timeout 30
}
vrrp_script chk_http_port {
script "/etc/keepalived/chk_nginx_pid.sh"
interval 2
weight 2
}
vrrp_instance VI_1 {
state BACKUP
interface eth3
virtual_router_id 51
priority 99
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
track_script {
chk_http_port
}
virtual_ipaddress {
192.168.10.6
}
}
vrrp_instance VI_2 {
state MASTER
interface eth3
virtual_router_id 52
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
track_script {
chk_http_port
}
virtual_ipaddress {
192.168.10.5
}
}
测试
停止192.168.10.1的nginx服务 访问http://192.168.10.5 与http://192.168.10.6 刷新也正常
启动192.168.10.1的nginx服务与keepalived服务（因为脚本写为nginx服务停止了，keepalived也停止）
停止192.168.10.4的nginx服务 访问http://192.168.10.5 与http://192.168.10.6 刷新也正常
查看ip a
会发现停掉10.4之后10.1eth0 会出现192.168.10.5与192.168.10.6
http://blog.运维网.com/e/u261/themes/default/images/spacer.gif
同理如此停掉10.1之后10.4eth3也会出现如图
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