实战案例:实现单主模式的Nginx反向代理的高可用
#在两个节点都配置nginx反向代理
[root@ka1-centos8 ~]#vim /etc/nginx/nginx.conf
http {
upstream websrvs {
server 10.0.0.7:80 weight=1;
server 10.0.0.17:80 weight=1;
}
server {
listen 80;
location /{
proxy_pass http://websrvs/;
}
}
}
#在两个节点都配置实现nginx反向代理高可用
[root@ka1-centos8 ~]#cat /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
root@localhost
}
notification_email_from kaadmin@localhost
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id ka1.magedu.org #在另一个节点为ka2.magedu.org
vrrp_mcast_group4 224.0.100.100
}
vrrp_script check_nginx {
script "/etc/keepalived/check_nginx.sh"
#script "/usr/bin/killall -0 nginx"
interval 1
weight -30
fall 3
rise 5
timeout 2
}
vrrp_instance VI_1 {
state MASTER #在另一个节点为BACKUP
interface eth0
virtual_router_id 66
priority 100 #在另一个节点为80
advert_int 1
authentication {
auth_type PASS
auth_pass 123456
}
virtual_ipaddress {
10.0.0.10/24 dev eth0 label eth0:1
}
track_interface {
eth0
}
notify_master "/etc/keepalived/notify.sh master"
notify_backup "/etc/keepalived/notify.sh backup"
notify_fault "/etc/keepalived/notify.sh fault"
track_script {
chk_nginx
}
}
[root@ka1-centos8 ~]# yum install psmisc -y
[root@ka1-centos8 ~]# cat /etc/keepalived/check_nginx.sh
#!/bin/bash
/usr/bin/killall -0 nginx
[root@ka1-centos8 ~]# chmod a+x /etc/keepalived/check_nginx.sh
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