Nginx-VIP

目录

• 通过切换VIP实现简单的高可用
  • 1. 测试环境
  • 2. 运行脚本
  • 3. 测试

通过切换VIP实现简单的高可用

我的环境是Centos7.4!两台Nginx,都配置了VIP.(192.168.32.139|192.168.32.140)

1. 测试环境

[root@server ~]# curl 192.168.32.139
v1.hyiqie.com Welcome to nginx!
[root@server ~]# curl 192.168.32.140
v2.hyiqie.com Welcome to nginx!
[root@server ~]# ping 192.168.32.35 -c 2
PING 192.168.32.35 (192.168.32.35) 56(84) bytes of data.
64 bytes from 192.168.32.35: icmp_seq=1 ttl=64 time=0.010 ms
64 bytes from 192.168.32.35: icmp_seq=2 ttl=64 time=0.020 ms

--- 192.168.32.35 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 999ms
rtt min/avg/max/mdev = 0.010/0.015/0.020/0.005 ms

2. 运行脚本

[root@server scripts]# vim auto_switch_vip.sh 
#!/bin/bash
while true;do
 nginx_online=`ps -ef|grep nginx|grep -v grep|wc -l`
  if [ $nginx_online -eq 0 ];then
   ifdown ens33:1
  else
   ping -c 2 192.168.32.35 >/dev/null 2>&1

   if [ $? -ne 0 ];then
cat>/etc/sysconfig/network-scripts/ifcfg-ens33:1<<hyiqie
TYPE="Ethernet"
BOOTPROTO="static"
IPADDR=192.168.32.35
NETMASK=255.255.255.0
NAME=ens33:1
DEVICE="ens33:1"
ONBOOT="yes"
hyiqie
   ifup ens33:1

   fi

  fi
 sleep 1
done

[root@server scripts]# bash auto_switch_vip.sh 

3. 测试

[root@server scripts]# ifconfig |grep ens33:1
ens33:1: flags=4163 UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
[root@server scripts]# curl 192.168.32.35
v1.hyiqie.com Welcome to nginx!
现在vip在server端,我将server端的Nginx关闭.
[root@server scripts]# /usr/local/nginx/sbin/nginx -s stop
[root@client network-scripts]# ifconfig |grep ens33:1
ens33:1: flags=4163 UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
[root@server scripts]# curl 192.168.32.35
v2.hyiqie.com Welcome to nginx!
现在vip在client端了.