准备工作：

总览

OS: minimal

Real Server

RHEL78RS1

192.168.0.127

Nginx v1.22
Tomcat v8.5.82

RHEL78RS2

192.168.0.122

Nginx v1.22
Tomcat v9.0.68

Keepalived Server

RHEL78Master

192.168.0.129

RHEL78Bak

192.168.0.130

一、Real Server

安装前准备:

config ARP

ifconfig:

$sudo yum install net-tools

Service

#vi /etc/init.d/realserver

/etc/init.d/realserver:

#!/bin/bash

SNS_VIP=192.168.0.220

case "$1" in
start)
       ifconfig lo:0 $SNS_VIP netmask 255.255.255.255 broadcast $SNS_VIP
       /sbin/route add -host $SNS_VIP dev lo:0
       echo "1" >/proc/sys/net/ipv4/conf/lo/arp_ignore
       echo "2" >/proc/sys/net/ipv4/conf/lo/arp_announce
       echo "1" >/proc/sys/net/ipv4/conf/all/arp_ignore
       echo "2" >/proc/sys/net/ipv4/conf/all/arp_announce
       sysctl -p >/dev/null 2>&1
       echo "RealServer Start OK"
       ;;
stop)
       ifconfig lo:0 down
       route del $SNS_VIP >/dev/null 2>&1
       echo "0" >/proc/sys/net/ipv4/conf/lo/arp_ignore
       echo "0" >/proc/sys/net/ipv4/conf/lo/arp_announce
       echo "0" >/proc/sys/net/ipv4/conf/all/arp_ignore
       echo "0" >/proc/sys/net/ipv4/conf/all/arp_announce
       echo "RealServer Stoped"
       ;;
*)
       echo "Usage: $0 {start|stop}"
       exit 1
esac
exit 0

exec

$sudo chmod 755 /etc/init.d/realserver
$sudo service realserver start

tomcat

/usr/local/tomcat/bin/startup.sh

nginx

sudo /usr/sbin/nginx

二、Keepalived Server

#systemctl start keepalived

see state

virtual IP show:

#ip addr show

see IP Virtual Server:

#ipvsadm -Ln
```bash
see log:
```bash
#journalctl -u keepalived

Version differences

v1 VS v2

nb_get_retry - v2

nb_get_retry is a deprecated keyword that was only used for SSL_GET and HTTP_GET checkers.
The keyword that should be used, and it applies to all relevant checkers, is retry.

三、运行效果

打开网址时: tomcat 8.5.82

刷新后: tomcat 9.0.67

Menu

架设Real Server和Keepalived Server

总览