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LVS负载均衡群集——keepalived+DR模式(实战!

发表于:2025-01-22 作者:千家信息网编辑
千家信息网最后更新 2025年01月22日,keepalived实现原理keepalived采用vrrp热备份协议,实现Linux服务器的多机热备功能vrrp,虚拟路由冗余协议,是针对路由器的一种备份解决方案keepalivd案列讲解keepa
千家信息网最后更新 2025年01月22日LVS负载均衡群集——keepalived+DR模式(实战!

keepalived实现原理

keepalived采用vrrp热备份协议,实现Linux服务器的多机热备功能
vrrp,虚拟路由冗余协议,是针对路由器的一种备份解决方案

keepalivd案列讲解

keepalived可实现多机热备,每个热备组有多台服务器,最常用的就是双机热备
双机热备的故障切换是由虚拟IP地址的漂移来实现,适用于各种应用服务器

DR模式原理

实验环境

CentOS7系统:                 DR1 主: 192.168.100.2                 DR2 备: 192.168.100.20                 虚拟IP:192.168.100.10                 web1:192.168.100.221                 web2:192.168.100.222win10系统:                   client:192.168.100.100

1、分别在四台Linux虚拟机上安装实验所需软件包

DR1主:[root@localhost ~]# yum install ipvsadm keepalived -yDR2从:[root@localhost ~]# yum install ipvsadm keepalived -yweb1:[root@localhost ~]# yum install httpd -yweb2:[root@localhost ~]# yum install httpd -y

2、分别将五台虚拟机的网络模式改为仅主机模式(五台操作相同)

3、分别修改四台Linux虚拟机的IP地址

DR1主:[root@localhost ~]# vim /etc/sysconfig/network-scripts/ifcfg-ens33 TYPE=EthernetPROXY_METHOD=noneBROWSER_ONLY=noBOOTPROTO=static     #dhcp改为staticDEFROUTE=yesIPV4_FAILURE_FATAL=noIPV6INIT=yesIPV6_AUTOCONF=yesIPV6_DEFROUTE=yesIPV6_FAILURE_FATAL=noIPV6_ADDR_GEN_MODE=stable-privacyNAME=ens33UUID=3ceed540-b04c-48d6-a4f7-79951f09ea1dDEVICE=ens33ONBOOT=yesIPADDR=192.168.100.201     #IP地址NETMASK=255.255.255.0     #子网掩码GATEWAY=192.168.100.1     #网关[root@localhost ~]# systemctl restart network     #重启网络服务[root@localhost ~]# ifconfig      #查看网卡信息ens33: flags=4163  mtu 1500        inet 192.168.100.201  netmask 255.255.255.0  broadcast 192.168.100.255     #IP地址配置成功        inet6 fe80::3e1d:31ba:f66a:6f80  prefixlen 64  scopeid 0x20        ether 00:0c:29:95:9b:1b  txqueuelen 1000  (Ethernet)        RX packets 10373  bytes 13584878 (12.9 MiB)        RX errors 0  dropped 0  overruns 0  frame 0        TX packets 4285  bytes 277473 (270.9 KiB)        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
DR2从:[root@localhost ~]# vim /etc/sysconfig/network-scripts/ifcfg-ens33 TYPE=EthernetPROXY_METHOD=noneBROWSER_ONLY=noBOOTPROTO=static     #dhcp改为staticDEFROUTE=yesIPV4_FAILURE_FATAL=noIPV6INIT=yesIPV6_AUTOCONF=yesIPV6_DEFROUTE=yesIPV6_FAILURE_FATAL=noIPV6_ADDR_GEN_MODE=stable-privacyNAME=ens33UUID=3ceed540-b04c-48d6-a4f7-79951f09ea1dDEVICE=ens33ONBOOT=yesIPADDR=192.168.100.202     #IP地址NETMASK=255.255.255.0     #子网掩码GATEWAY=192.168.100.1     #网关[root@localhost ~]# systemctl restart network     #重启网络服务[root@localhost ~]# ifconfig       #查看网卡信息ens33: flags=4163  mtu 1500        inet 192.168.100.202  netmask 255.255.255.0  broadcast 192.168.100.255     #IP地址配置成功        inet6 fe80::3e1d:31ba:f66a:6f80  prefixlen 64  scopeid 0x20        inet6 fe80::2558:848e:ba08:4183  prefixlen 64  scopeid 0x20        ether 00:0c:29:27:1c:3f  txqueuelen 1000  (Ethernet)        RX packets 10470  bytes 13593710 (12.9 MiB)        RX errors 0  dropped 0  overruns 0  frame 0        TX packets 4240  bytes 273794 (267.3 KiB)        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
web1:[root@localhost ~]# vim /etc/sysconfig/network-scripts/ifcfg-ens33TYPE=EthernetPROXY_METHOD=noneBROWSER_ONLY=noBOOTPROTO=static     #dhcp改为staticDEFROUTE=yesIPV4_FAILURE_FATAL=noIPV6INIT=yesIPV6_AUTOCONF=yesIPV6_DEFROUTE=yesIPV6_FAILURE_FATAL=noIPV6_ADDR_GEN_MODE=stable-privacyNAME=ens33UUID=8ecd53ce-afdb-46f8-b7ff-b2f428a3bc8fDEVICE=ens33ONBOOT=yesIPADDR=192.168.100.221     #IP地址NETMASK=255.255.255.0     #子网掩码GATEWAY=192.168.100.1     #网关[root@localhost ~]# systemctl restart network     #重启网络服务[root@localhost ~]# ifconfig       #查看网卡信息ens33: flags=4163  mtu 1500        inet 192.168.100.221  netmask 255.255.255.0  broadcast 192.168.100.255     #IP地址配置成功        inet6 fe80::c776:9d00:618:88f2  prefixlen 64  scopeid 0x20        ether 00:0c:29:eb:34:07  txqueuelen 1000  (Ethernet)        RX packets 11508  bytes 14937643 (14.2 MiB)        RX errors 0  dropped 0  overruns 0  frame 0        TX packets 3932  bytes 254623 (248.6 KiB)        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
web2:[root@localhost ~]# vim /etc/sysconfig/network-scripts/ifcfg-ens33TYPE=EthernetPROXY_METHOD=noneBROWSER_ONLY=noBOOTPROTO=static     #dhcp改为staticDEFROUTE=yesIPV4_FAILURE_FATAL=noIPV6INIT=yesIPV6_AUTOCONF=yesIPV6_DEFROUTE=yesIPV6_FAILURE_FATAL=noIPV6_ADDR_GEN_MODE=stable-privacyNAME=ens33UUID=09073596-a7cf-404c-a098-28c3ff58c44bDEVICE=ens33ONBOOT=yesIPADDR=192.168.100.222     #IP地址NETMASK=255.255.255.0     #子网掩码GATEWAY=192.168.100.1     #网关[root@localhost ~]# systemctl restart network     #重启网络服务[root@localhost ~]# ifconfig       #查看网卡信息ens33: flags=4163  mtu 1500        inet 192.168.100.222  netmask 255.255.255.0  broadcast 192.168.100.255     #IP地址配置成功        inet6 fe80::5134:22f5:842b:5201  prefixlen 64  scopeid 0x20        ether 00:0c:29:0d:f1:75  txqueuelen 1000  (Ethernet)        RX packets 11425  bytes 14931323 (14.2 MiB)        RX errors 0  dropped 0  overruns 0  frame 0        TX packets 4454  bytes 286016 (279.3 KiB)        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

4、修改win10系统的IP地址,并关闭防火墙

DR1主服务器配置

1、配置路由转发功能

[root@localhost ~]# vim /etc/sysctl.confnet.ipv4.ip_forward=1     #配置路由转发功能#proc响应关闭重定向功能net.ipv4.conf.all.send_redirects=0net.ipv4.conf.default.send_redirects=0net.ipv4.conf.ens33.send_redirects=0[root@localhost ~]# sysctl -p     #加载生效net.ipv4.ip_forward = 1net.ipv4.conf.all.send_redirects = 0net.ipv4.conf.default.send_redirects = 0net.ipv4.conf.ens33.send_redirects = 0[root@localhost ~]# 

2、配置虚拟网卡

[root@localhost ~]# cd /etc/sysconfig/network-scripts/[root@localhost network-scripts]# cp -p ifcfg-ens33 ifcfg-ens33:0    #复制虚拟网卡的配置文件[root@localhost network-scripts]# vim ifcfg-ens33:0#添加配置文件信息,原有的信息删除DEVICE=ens33:0ONBOOT=yesIPADDR=192.168.100.10NETMASK=255.255.255.0[root@localhost network-scripts]# systemctl restart network     #重启网络服务[root@localhost network-scripts]# ifconfig      #查看网卡信息ens33: flags=4163  mtu 1500        inet 192.168.100.201  netmask 255.255.255.0  broadcast 192.168.100.255        inet6 fe80::3e1d:31ba:f66a:6f80  prefixlen 64  scopeid 0x20        ether 00:0c:29:95:9b:1b  txqueuelen 1000  (Ethernet)        RX packets 11455  bytes 13700437 (13.0 MiB)        RX errors 0  dropped 0  overruns 0  frame 0        TX packets 4713  bytes 330899 (323.1 KiB)        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0ens33:0: flags=4163  mtu 1500        inet 192.168.100.10  netmask 255.255.255.0  broadcast 192.168.100.255     #虚拟网卡配置成功        ether 00:0c:29:95:9b:1b  txqueuelen 1000  (Ethernet)

3、创建脚本便于service管理

[root@localhost network-scripts]# cd /etc/init.d/[root@localhost init.d]# vim dr.sh#!/bin/bashGW=192.168.100.1   #网关VIP=192.168.100.10    #虚拟ipRIP1=192.168.100.221   #真实web1服务器ipRIP2=192.168.100.222   #真实web2服务器ipcase "$1" in        start)                /sbin/ipvsadm --save > /etc/sysconfig/ipvsadm    #保存配置                systemctl start ipvsadm    #启动服务                /sbin/ifconfig ens33:0 $VIP broadcast $VIP netmask 255.255.255.255 broadcast $VIP up                                #设置ens33:0地址,广播地址,子网掩码,并开启                /sbin/route add -host $VIP dev ens33:0   #添加路由网段信息                /sbin/ipvsadm -A -t $VIP:80 -s rr   #指定虚拟服务访问入口,指定轮询算法                /sbin/ipvsadm -a -t $VIP:80 -r $RIP1:80 -g    #指定真实服务器web1,dr模式                /sbin/ipvsadm -a -t $VIP:80 -r $RIP2:80 -g    #指定真实服务器web2,dr模式                echo "ipvsadm starting ---------------------[ok]"                ;;        stop)                /sbin/ipvsadm -C    #清空缓存                systemctl stop ipvsadm    #关闭服务                ifconfig ens33:0 down    #关闭接口                route del $VIP     #删除路由信息                echo "ipvsadm stoped--------------------[ok]"                ;;        status)                if [ ! -e /var/lock/subsys/ipvsadm ];then    #判断文件存在与否决定状态                        echo "ipvsadm stoped--------------"                        exit 1                else                        echo "ipvsadm Runing-----------[ok]"                fi                ;;        *)                echo "Usage: $0 {start|stop|status}"                exit 1        esac        exit 0[root@localhost init.d]# chmod +x dr.sh     #给执行权限[root@localhost init.d]# service dr.sh start     #开启服务ipvsadm starting ---------------------[ok][root@localhost init.d]# systemctl stop firewalld.service     #关闭防火墙[root@localhost init.d]# setenforce 0     #关闭增强型安全功能[root@localhost init.d]# 

4、配置DR1服务器keepalived部署

[root@localhost ~]# cd /etc/keepalived/[root@localhost keepalived]# lskeepalived.conf[root@localhost keepalived]# vim keepalived.conf smtp_server 127.0.0.1           #指向本地router_id LVS_01   #指定名称,备份服务器不同名称vrrp_instance VI_1 {    state MASTER         #主服务器,备份服务器是BACKUP    interface ens33    virtual_router_id 10     #组号相同    priority 100      #优先级,主服务器优先级应大于备份服务器    advert_int 1    authentication {        auth_type PASS    #验证类型        auth_pass 1111     #验证密码    }    virtual_ipaddress {        192.168.100.10     #虚拟IP地址    }}virtual_server 192.168.100.10 80 {     #虚拟服务器    delay_loop 6    lb_algo rr    lb_kind DR    persistence_timeout 50    protocol TCP   real_server 192.168.100.221 80 {     #真实服务器        weight 1        TCP_CHECK {            connect_port 80        #连接端口            connect_timeout 3    #连接超时            nb_get_retry 3            delay_before_retry 3        }    }    real_server 192.168.100.222 80 {     #真实服务器        weight 1        TCP_CHECK {            connect_port 80        #连接端口            connect_timeout 3    #连接超时            nb_get_retry 3            delay_before_retry 3        }    }}[root@localhost keepalived]# systemctl start keepalived.service     #开启服务[root@localhost keepalived]# 

DR2从服务器配置

1、配置路由转发功能

[root@localhost ~]# vim /etc/sysctl.confnet.ipv4.ip_forward=1     #配置路由转发功能#proc响应关闭重定向功能net.ipv4.conf.all.send_redirects=0net.ipv4.conf.default.send_redirects=0net.ipv4.conf.ens33.send_redirects=0[root@localhost ~]# sysctl -p     #加载生效net.ipv4.ip_forward = 1net.ipv4.conf.all.send_redirects = 0net.ipv4.conf.default.send_redirects = 0net.ipv4.conf.ens33.send_redirects = 0[root@localhost ~]# 

2、配置虚拟网卡

[root@localhost ~]# cd /etc/sysconfig/network-scripts/[root@localhost network-scripts]# cp -p ifcfg-ens33 ifcfg-ens33:0    #复制虚拟网卡的配置文件[root@localhost network-scripts]# vim ifcfg-ens33:0#添加配置文件信息,原有的信息删除DEVICE=ens33:0ONBOOT=yesIPADDR=192.168.100.10NETMASK=255.255.255.0[root@localhost network-scripts]# systemctl restart network     #重启网络服务[root@localhost network-scripts]# ifconfig      #查看网卡信息ens33: flags=4163  mtu 1500        inet 192.168.100.202  netmask 255.255.255.0  broadcast 192.168.100.255        inet6 fe80::3e1d:31ba:f66a:6f80  prefixlen 64  scopeid 0x20        inet6 fe80::2558:848e:ba08:4183  prefixlen 64  scopeid 0x20        ether 00:0c:29:27:1c:3f  txqueuelen 1000  (Ethernet)        RX packets 15720  bytes 14706442 (14.0 MiB)        RX errors 0  dropped 0  overruns 0  frame 0        TX packets 6289  bytes 1113172 (1.0 MiB)        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0ens33:0: flags=4163  mtu 1500        inet 192.168.100.10  netmask 255.255.255.0  broadcast 192.168.100.255     #虚拟网卡配置成功        ether 00:0c:29:27:1c:3f  txqueuelen 1000  (Ethernet)

3、创建脚本便于service管理

[root@localhost network-scripts]# cd /etc/init.d/[root@localhost init.d]# vim dr.sh#!/bin/bashGW=192.168.100.1   #网关VIP=192.168.100.10    #虚拟ipRIP1=192.168.100.221   #真实web1服务器ipRIP2=192.168.100.222   #真实web2服务器ipcase "$1" in        start)                /sbin/ipvsadm --save > /etc/sysconfig/ipvsadm    #保存配置                systemctl start ipvsadm    #启动服务                /sbin/ifconfig ens33:0 $VIP broadcast $VIP netmask 255.255.255.255 broadcast $VIP up                                #设置ens33:0地址,广播地址,子网掩码,并开启                /sbin/route add -host $VIP dev ens33:0   #添加路由网段信息                /sbin/ipvsadm -A -t $VIP:80 -s rr   #指定虚拟服务访问入口,指定轮询算法                /sbin/ipvsadm -a -t $VIP:80 -r $RIP1:80 -g    #指定真实服务器web1,dr模式                /sbin/ipvsadm -a -t $VIP:80 -r $RIP2:80 -g    #指定真实服务器web2,dr模式                echo "ipvsadm starting ---------------------[ok]"                ;;        stop)                /sbin/ipvsadm -C    #清空缓存                systemctl stop ipvsadm    #关闭服务                ifconfig ens33:0 down    #关闭接口                route del $VIP     #删除路由信息                echo "ipvsadm stoped--------------------[ok]"                ;;        status)                if [ ! -e /var/lock/subsys/ipvsadm ];then    #判断文件存在与否决定状态                        echo "ipvsadm stoped--------------"                        exit 1                else                        echo "ipvsadm Runing-----------[ok]"                fi                ;;        *)                echo "Usage: $0 {start|stop|status}"                exit 1        esac        exit 0[root@localhost init.d]# chmod +x dr.sh     #给执行权限[root@localhost init.d]# service dr.sh start     #开启服务ipvsadm starting ---------------------[ok][root@localhost init.d]# systemctl stop firewalld.service     #关闭防火墙[root@localhost init.d]# setenforce 0     #关闭增强型安全功能[root@localhost init.d]# 

4、配置DR1服务器keepalived部署

[root@localhost ~]# cd /etc/keepalived/[root@localhost keepalived]# lskeepalived.conf[root@localhost keepalived]# vim keepalived.conf smtp_server 127.0.0.1           #指向本地router_id LVS_02   #指定名称,备份服务器不同名称vrrp_instance VI_1 {    state BACKUP         #备份服务器BACKUP,主服务器是MASTER    interface ens33    virtual_router_id 10     #组号相同    priority 90      #优先级,备份服务器应小于主服务器优先级    advert_int 1    authentication {        auth_type PASS    #验证类型        auth_pass 1111     #验证密码    }    virtual_ipaddress {        192.168.100.10     #虚拟IP地址    }}virtual_server 192.168.100.10 80 {     #虚拟服务器    delay_loop 6    lb_algo rr    lb_kind DR    persistence_timeout 50    protocol TCP   real_server 192.168.100.221 80 {     #真实服务器        weight 1        TCP_CHECK {            connect_port 80        #连接端口            connect_timeout 3    #连接超时            nb_get_retry 3            delay_before_retry 3        }    }    real_server 192.168.100.222 80 {     #真实服务器        weight 1        TCP_CHECK {            connect_port 80        #连接端口            connect_timeout 3    #连接超时            nb_get_retry 3            delay_before_retry 3        }    }}[root@localhost keepalived]# systemctl start keepalived.service     #开启服务[root@localhost keepalived]# 

配置web1服务器

1、开启并配置httpd服务

[root@localhost ~]# systemctl stop firewalld.service    #关闭防火墙[root@localhost ~]# setenforce 0   #关闭增强型安全功能[root@localhost ~]# systemctl start httpd.service      #开启httpd服务[root@localhost ~]# cd /var/www/html/[root@localhost html]# echo "this is abc web" > index.html    #创建网站页面[root@localhost html]# 

2、修改回环网卡的虚拟网卡

[root@localhost html]# cd /etc/sysconfig/network-scripts/[root@localhost network-scripts]# cp ifcfg-lo ifcfg-lo:0    #复制回环网卡配置文件[root@localhost network-scripts]# vim ifcfg-lo:0#添加配置文件信息,原有的信息删除DEVICE=lo:0IPADDR=192.168.100.10NETMASK=255.255.255.0ONBOOT=yes

3、添加脚本便于service管理

[root@localhost network-scripts]# cd /etc/init.d/[root@localhost init.d]# vim web.sh#!/bin/bashVIP=192.168.100.10        case "$1" in        start)                ifconfig lo:0 $VIP netmask 255.255.255.255 broadcast $VIP                /sbin/route add -host $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/lo/arp_ignore        echo "2" > /proc/sys/net/ipv4/conf/lo/arp_announce        sysctl -p > /dev/null 2>&1        echo "RealServer Start OK "        ;;        stop)                ifconfig lo:0 down                route del $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[root@localhost init.d]# chmod +x web.sh     #添加执行权限[root@localhost init.d]# service web.sh start       #开启服务RealServer Start OK [root@localhost init.d]# ifup lo:0    #开启网卡[root@localhost init.d]#ifconfig     #查看网卡信息ens33: flags=4163  mtu 1500        inet 192.168.100.221  netmask 255.255.255.0  broadcast 192.168.100.255        inet6 fe80::c776:9d00:618:88f2  prefixlen 64  scopeid 0x20        ether 00:0c:29:eb:34:07  txqueuelen 1000  (Ethernet)        RX packets 13293  bytes 15122368 (14.4 MiB)        RX errors 0  dropped 0  overruns 0  frame 0        TX packets 4692  bytes 360484 (352.0 KiB)        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0lo:0: flags=73  mtu 65536        inet 192.168.100.10  netmask 255.255.255.255        loop  txqueuelen 1  (Local Loopback)

配置web2服务器

1、开启并配置httpd服务

[root@localhost ~]# systemctl stop firewalld.service    #关闭防火墙[root@localhost ~]# setenforce 0   #关闭增强型安全功能[root@localhost ~]# systemctl start httpd.service      #开启httpd服务[root@localhost ~]# cd /var/www/html/[root@localhost html]# echo "this is xyz web" > index.html    #创建网站页面[root@localhost html]# 

2、修改回环网卡的虚拟网卡

[root@localhost html]# cd /etc/sysconfig/network-scripts/[root@localhost network-scripts]# cp ifcfg-lo ifcfg-lo:0    #复制回环网卡配置文件[root@localhost network-scripts]# vim ifcfg-lo:0#添加配置文件信息,原有的信息删除DEVICE=lo:0IPADDR=192.168.100.10NETMASK=255.255.255.0ONBOOT=yes

3、添加脚本便于service管理

[root@localhost network-scripts]# cd /etc/init.d/[root@localhost init.d]# vim web.sh#!/bin/bashVIP=192.168.100.10        case "$1" in        start)                ifconfig lo:0 $VIP netmask 255.255.255.255 broadcast $VIP                /sbin/route add -host $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/lo/arp_ignore        echo "2" > /proc/sys/net/ipv4/conf/lo/arp_announce        sysctl -p > /dev/null 2>&1        echo "RealServer Start OK "        ;;        stop)                ifconfig lo:0 down                route del $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[root@localhost init.d]# chmod +x web.sh     #添加执行权限[root@localhost init.d]# service web.sh start       #开启服务RealServer Start OK [root@localhost init.d]# ifup lo:0    #开启网卡[root@localhost init.d]#ifconfig     #查看网卡信息ens33: flags=4163  mtu 1500        inet 192.168.100.222  netmask 255.255.255.0  broadcast 192.168.100.255        inet6 fe80::5134:22f5:842b:5201  prefixlen 64  scopeid 0x20        ether 00:0c:29:0d:f1:75  txqueuelen 1000  (Ethernet)        RX packets 16771  bytes 15510870 (14.7 MiB)        RX errors 0  dropped 0  overruns 0  frame 0        TX packets 7516  bytes 783039 (764.6 KiB)        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0lo:0: flags=73  mtu 65536        inet 192.168.100.10  netmask 255.255.255.255        loop  txqueuelen 1  (Local Loopback)

测试群集是否搭建成功

1、用win10测试主机访问虚拟IP地址:192.168.100.10

再次刷新页面,可以测试轮询机制

2、模拟DR1主服务器故障,然后再次用win10测试主机访问虚拟IP地址:192.168.100.10

[root@localhost keepalived]# ifdown ens33:0#在DR1主服务器上,关闭虚拟网卡,模拟故障

再次刷新页面,可以测试轮询机制

测试成功!!!

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