nginx+keepalived构建高可用服务
2024-10-21 14:37:55
1.整体环境规划
虚拟IP：10.0.4.248
主Nginx：10.0.4.249
备用Nginx：10.0.4.250
2.keepalived安装
#cd /usr/local/src
#wget http://www.keepalived.org/software/keepalived-1.2.22.tar.gz
#./configure --prefix=/usr/local/keepalived
#make & make install
3.master服务keepalived.conf配置
! Configuration File for keepalived
global_defs {
router_id edu-proxy-
}
vrrp_script chk_nginx {
script "/etc/keepalived/nginx_check.sh"
interval
weight -
}
vrrp_instance VI_1 {
state MASTER
interface eth0
virtual_router_id
mcast_src_ip 10.0.4.249
priority
nopreempt
advert_int
authentication {
auth_type PASS
auth_pass
}
track_script {
chk_nginx
}
virtual_ipaddress {
10.0.4.248
}
}
4.backerup服务keepalived.conf配置
! Configuration File for keepalived
global_defs {
router_id edu-proxy-
}
vrrp_script chk_nginx {
script "/etc/keepalived/nginx_check.sh"
interval
weight -
}
vrrp_instance VI_1 {
state BACKUP
interface eth0
virtual_router_id
mcast_src_ip 10.0.4.250
priority
advert_int
authentication {
auth_type PASS
auth_pass
}
track_script {
chk_nginx
}
virtual_ipaddress {
10.0.4.248
}
}
5.nginx_check.sh脚本编写
#!/bin/bash A=`ps -C nginx –no-header |wc -l` if [ $A -eq ];then /usr/local/openrestry/nginx/sbin/nginx //Nginx安装路径 sleep if [ `ps -C nginx --no-header |wc -l` -eq ];then killall keepalived fi fi
6.启动keepalived
主
/usr/local/keepalived/sbin/keepalived [root@localhost sbin]# ip addr : lo: <LOOPBACK,UP,LOWER_UP> mtu qdisc noqueue state UNKNOWN link/loopback ::::: brd ::::: inet 127.0.0.1/ scope host lo inet6 ::/ scope host valid_lft forever preferred_lft forever : eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu qdisc pfifo_fast state UP qlen link/ether :0c::c6:9b: brd ff:ff:ff:ff:ff:ff inet 10.0.4.249/ brd 10.0.4.255 scope global eth0 inet 10.0.4.248/ scope global eth0 inet6 fe80::20c:29ff:fec6:9b91/ scope link valid_lft forever preferred_lft forever
备用
[root@localhost keepalived]# ip addr : lo: <LOOPBACK,UP,LOWER_UP> mtu qdisc noqueue state UNKNOWN link/loopback ::::: brd ::::: inet 127.0.0.1/ scope host lo inet6 ::/ scope host valid_lft forever preferred_lft forever : eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu qdisc pfifo_fast state UP qlen link/ether :0c:::6c: brd ff:ff:ff:ff:ff:ff inet 10.0.4.250/ brd 10.0.4.255 scope global eth0 inet 10.0.4.248/ scope global eth0 inet6 fe80::20c:29ff:fe75:6c82/ scope link valid_lft forever preferred_lft forever
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