LVS-DR模式下（RS检测）ldirectord工具实现部分节点掉点后将请求发往正常设备进行处理

基于前文的LVS-DR集群构建环境

一.下载ldirectord软件

二.将模板文件中的LVS-DR模式相关文件拷贝到/etc/ha.d主配置目录并按实际设备修改

三.配置两台RS匹配规则

四.停止RS1的http服务进行测试

RS1失去工作能力，RS2接替RS1

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基于前文的LVS-DR集群构建环境

一.下载ldirectord软件

[root@localhost ~]# yum install -y ldirectord-4.1.1-3.40.el7.noarch.rpm
[root@localhost ~]# rpm -ql ldirectord
/etc/ha.d   #主配置目录
/etc/ha.d/conf
/etc/ha.d/resource.d
/etc/ha.d/resource.d/ldirectord
/etc/logrotate.d/ldirectord
/etc/rc.d/init.d/ldirectord
/run/ldirectord
/usr/lib/systemd/system/ldirectord.service   #服务管理
/usr/lib/tmpfiles.d/ldirectord.conf
/usr/sbin/ldirectord  #主程序
/usr/share/doc/ldirectord-4.1.1
/usr/share/doc/ldirectord-4.1.1/ldirectord.cf  #配置模板文件
/usr/share/man/man8/ldirectord.8.gz

二.将模板文件中的LVS-DR模式相关文件拷贝到/etc/ha.d主配置目录并按实际设备修改

[root@localhost ha.d]# pwd
/etc/ha.d
[root@localhost ha.d]# vim ldirectord.cf 
checktimeout=3
checkinterval=1
autoreload=yes  #自动重载
logfile="/var/log/ldirectord.log"   #日志存放路径
quiescent=no

virtual=192.168.2.188:80   #VIP地址1
        servicename=Web Site
        comment=Test load balanced web site
        real=192.168.2.191:80 gate 2   #RS地址，gate表示权重1
        real=192.168.2.192:80 gate 3
        service=http  
        scheduler=wrr  #调度算法
        protocol=tcp  
        checktype=negotiate
        checkport=80
        request="index.html"
        receive="Test Page"
        virtualhost=www.x.y.z

三.配置两台RS匹配规则

[root@localhost ha.d]# ipvsadm -Ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  192.168.2.188:80 wrr
[root@localhost ha.d]# ipvsadm -a -t 192.168.2.188:80 -r 192.168.2.191 -g -w 2
[root@localhost ha.d]# ipvsadm -a -t 192.168.2.188:80 -r 192.168.2.192 -g -w 3
[root@localhost ha.d]# ipvsadm
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  localhost.localdomain:http wrr
  -> 192.168.2.191:http           Route   2      0          0         
  -> 192.168.2.192:http           Route   3      0          0         

四.停止RS1的http服务进行测试

RS1失去工作能力，RS2接替RS1

[root@localhost ~]# systemctl stop httpd.service
[root@localhost ~]# for ((i=1;i<=10;i++)); do curl 192.168.2.188:80; done
share192
curl: (7) Failed connect to 192.168.2.188:80; Connection refused
share192
share192
curl: (7) Failed connect to 192.168.2.188:80; Connection refused
share192
curl: (7) Failed connect to 192.168.2.188:80; Connection refused
share192
share192
curl: (7) Failed connect to 192.168.2.188:80; Connection refused
[root@localhost ~]# for ((i=1;i<=10;i++)); do curl 192.168.2.188:80; done
share192
curl: (7) Failed connect to 192.168.2.188:80; Connection refused
share192
share192
curl: (7) Failed connect to 192.168.2.188:80; Connection refused
share192
curl: (7) Failed connect to 192.168.2.188:80; Connection refused
share192
share192
curl: (7) Failed connect to 192.168.2.188:80; Connection refused