ipvs+ldirectord实现高可用ipvs

一、heartbeat准备

    1、接上文

    2、 安装heartbeat-ldirectord组件包

    
[root@node1 heartbeat]# yum localinstall heartbeat-ldirectord-2.1.4-12.el6.x86_64.rpm

3、ldirectord组件简介

    ldirectord依赖于自己的配置文件来生成ipvs的规则,因此,定义LVS集群、添加RS都是在ldirectord的配置文件中指定,而无需手动执行ipvsadm命令。ldirectord对LVS集群的director高可用,并对LVS进群的RS提供健康状态监测,若某节点出现故障,则会把它从集群系统中剔除,并在其回复正常后,将它重新加入集群系统。ldirectord还可以调用ipvsadm命令创建LVS路由表信息,只需要在/etc/ha.d/ldirectord.cf配置文件中指明即可。

    4、基本信息

    wKioL1gxFMuzyeDEAAAo9TfmwgU377.png

二、配置

RS:

1、准备RS脚本
#!/bin/bash
 
vip=192.168.0.17
interface="lo:0"
 
case $1 in
start)
        echo 1 > /proc/sys/net/ipv4/conf/all/arp_ignore
        echo 1 > /proc/sys/net/ipv4/conf/eth0/arp_ignore
        echo 2 > /proc/sys/net/ipv4/conf/all/arp_announce
        echo 2 > /proc/sys/net/ipv4/conf/eth0/arp_announce
        ifconfig $interface $vip broadcast $vip netmask 255.255.255.255 up
        route add -host $vip dev $interface
        ;;
stop)
        echo 0 > /proc/sys/net/ipv4/conf/all/arp_ignore
        echo 0 > /proc/sys/net/ipv4/conf/eth0/arp_ignore
        echo 0 > /proc/sys/net/ipv4/conf/all/arp_announce
        echo 0 > /proc/sys/net/ipv4/conf/eth0/arp_announce
        ifconfig $interface down
        ;;
status)
        if ifconfig lo:0 | grep $vip &> /dev/null; then
                echo "ipvs is running."
        else
                echo "ipvs is stopped."
        fi
        ;;
*)
        echo "please input : `basename $0` {start|stop|status}"
        exit 1
esac
 
[root@node3 ~]# chmod +x rs.sh
 
2、准备httpd
[root@node3 ~]# yum install httpd
[root@node3 ~]# echo "This is RS" > /var/www/html/index.html
[root@node3 ~]# service httpd start
[root@node3 ~]# curl 192.168.0.20
This is RS
[root@node3 ~]# ./rs.sh start

主备Director测试

[root@node1 ~]# ifconfig eth0:0 192.168.0.17 broadcast 192.168.0.17 netmask 255.255.255.255 up
[root@node1 ~]# route add -host 192.168.0.17 dev eth0:0
[root@node1 ~]# ipvsadm -A -t 192.168.0.17:80 -s rr
[root@node1 ~]# ipvsadm -a -t 192.168.0.17:80 -r 192.168.0.20 -g

#del test
[root@node1 ~]# ipvsadm -C
[root@node1 ~]# route del -host 192.168.0.17
[root@node1 ~]# ifconfig eth0:0 down

主Director:node1配置

1、cp样例配置文件
[root@node1 ~]# cd /usr/share/doc/heartbeat-ldirectord-2.1.4/
[root@node1 heartbeat-ldirectord-2.1.4]# cp ldirectord.cf /etc/ha.d
[root@node1 heartbeat-ldirectord-2.1.4]# cd /etc/ha.d
 
2、配置文件
##全局配置
# Global Directives 
##健康状态检测超时时间间隔                            
checktimeout=3 
##每一秒检查一次                            
checkinterval=1
#fallback=127.0.0.1:80
##自动装载配置文件
autoreload=yes
##日志文件
logfile="/var/log/ldirectord.log"
##日志文件级别
#logfile="local0"
##邮件通知警告信息
#emailalert="admin@x.y.z"
##邮件通知间隔1小时
#emailalertfreq=3600
##邮件通知所有的状态信息
#emailalertstatus=all
##是否工作于静默模式
quiescent=yes
 
##虚拟服务配置
# Sample for an http virtual service
##VIP            
virtual=192.168.0.17:80
##RS gate为dr类型
                real=192.168.0.20:80 gate
        #real=192.168.6.3:80 gate
        #real=192.168.6.6:80 gate
##backserver
        fallback=127.0.0.1:80 gate
##健康状态检查基于http协议
        service=http
##请求的页面
        request=".health.html"
##检查request=“”页面中的字符串是否一致
        receive=""
##对多个虚拟主机进行检查
        virtualhost=some.domain.com.au
##调度类型为rr
        scheduler=rr
##持久连接时长
        #persistent=600
##掩码
        #netmask=255.255.255.255
##基于tcp的检查,集群服务类型
        protocol=tcp
##检查类型为交互式检查
##checktype:connect是传输层检查,ping是网络层检查,negotlate是应用层检查
##当checktype=negotlate时,ldirectord将基于指定的协议与各RS建立连接,完成应用层检查
        checktype=negotia
##检查端口为80
        checkport=80
##请求的页面
        request="index.html"
##请求的字符串检查
        #receive="Test Page"
##对虚拟主机检查
        #virtualhost=
         
         
3、准备web服务,node1作为back server提供sorry server服务
[root@node1 ha.d]# vim /var/www/html/index.html
This is sorry server(node1)
[root@node1 ha.d]# service httpd start
Starting httpd: httpd: Could not reliably determine the server's fully qualified domain name, using 192.168.0.15 for ServerName
                                                           [  OK  ]
[root@node1 ha.d]# curl 192.168.0.15
This is sorry server(node1)
 
4、将配置文件cp给node2
[root@node1 ha.d]# scp ldirectord.cf node2:/etc/ha.d/

备Director:node2配置

[root@node2 ~]# vim /var/www/html/index.html 
This is sorry server(node2)
[root@node2 ~]# service httpd start
Starting httpd: httpd: Could not reliably determine the server's fully qualified domain name, using 192.168.0.16 for ServerName
                                                           [  OK  ]
[root@node2 ~]# curl 192.168.0.16
This is sorry server(node2)

RS准备测试页

[root@node3 ~]# echo "ok"  > /var/www/html/.health.html

启动服务

[root@node1 ~]# service heartbeat start; ssh node2 'service heartbeat start'

gui界面配置资源

1、定义资源组ipvs,定义集群ip资源(vip)

wKioL1gxELCyetcIAADczpHFfEE299.png

2、定义ipvs规则,lsb格式不提供参数,ocf格式的资源代理须提供配置文件

wKiom1gxEa7ieEOfAADaUNvR_Bk213.png

3、启动资源

wKioL1gxEhXSmsReAAEwx1BWtYI866.png

4、验证node2节点

[root@node2 ~]# ipvsadm -L -n
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  192.168.0.17:80 rr
  -> 192.168.0.20:80              Route   1      0          0 
   
[root@node2 ~]# ip add show eth0
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 00:0c:29:15:ea:32 brd ff:ff:ff:ff:ff:ff
    inet 192.168.0.16/24 brd 192.168.0.255 scope global eth0
    inet 192.168.0.17/24 brd 192.168.0.255 scope global secondary eth0
    inet6 fe80::20c:29ff:fe15:ea32/64 scope link 
       valid_lft forever preferred_lft forever

5、验证负载均衡集群效果

wKiom1gxEu3wgWnYAAA-CgSsgsg478.png

6、检测RS下线,director错误页面

[root@node3 ~]# mv /var/www/html/.health.html /var/www/html/a.html
[root@node2 ~]# ipvsadm -L -n
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  192.168.0.17:80 rr
  -> 127.0.0.1:80                 Local   1      0          0         
  -> 192.168.0.20:80              Route   0      0          0
 

wKioL1gxE92TVSjvAABApx6xdqs999.png

原文地址:https://www.cnblogs.com/jym1/p/8073206.html