实现keepalived双主模型lvs高可用集群的实验总结

下文给大家带来实现keepalived双主模型lvs高可用集群的实验总结，希望能够给大家在实际运用中带来一定的帮助，负载均衡涉及的东西比较多，理论也不多，网上有很多书籍，今天我们就用在行业内累计的经验来做一个解答。

实现keepalived双主模型lvs高可用集群

一、拓扑图

二、环境准备

两台负载均衡调度器，两台web云服务器。

调度器A环境:

VS:一张网卡

DIP:192.168.0.7/24

VIP（主）：192.168.0.200

VIP(备)：192.168.0.201

软件包：yum install -y keepalived ipvsadm nginx(作用：sorry-server服务)

调度器B环境：

VS:一张网卡

DIP:192.168.0.8/24

VIP（主）：192.168.0.201

VIP(备)：192.168.0.200

软件包：yum install -y keepalived ipvsadm nginx(作用：sorry-server服务)

web服务器A环境：

RS1:192.168.0.3

lo:0:192.168.0.200

lo:1:192.168.0.201

软件包：yum install -y httpd

web服务器B环境：

RS1:192.168.0.4

lo:0:192.168.0.200

lo:1:192.168.0.201

软件包：yum install -y httpd

三、配置

调度器A配置

主要操作：ip配置，时间同步、hosts文件更改，修改主机名（确保主从节点能够通信）、keepalived.conf配置文件更改，通知脚本配置(两个脚本)，ipvsadm规则查看

ip配置

[root@node1keepalived]# ip a1: lo:  mtu 65536 qdisc noqueue state UNKNOWN qlen 1    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00    inet 127.0.0.1/8 scope host lo       valid_lft forever preferred_lft forever    inet6 ::1/128 scope host        valid_lft forever preferred_lft forever2: ens33:  mtu 1500 qdisc pfifo_fast state UP qlen 1000    link/ether 00:0c:29:0c:d2:06 brd ff:ff:ff:ff:ff:ff    inet 192.168.0.7/24 brd 192.168.0.255 scope global ens33       valid_lft forever preferred_lft forever    inet 192.168.0.200/24 scope global secondary ens33:1       valid_lft forever preferred_lft forever    inet6 fe80::20c:29ff:fe0c:d206/64 scope link        valid_lft forever preferred_lft forever

时间同步

ntpdate ntp-server-ip #时间服务器的ip

hosts文件

[root@node1 keepalived]# cat /etc/hosts127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4 node1::1         localhost localhost.localdomain localhost6 localhost6.localdomain6 node1192.168.0.8 node2192.168.0.7 node1

主机名修改

hostnamectl set-hostname node1

keepalived.conf配置文件更改

[root@localhost keepalived]# cat keepalived.conf! Configuration File for keepalivedglobal_defs {   notification_email {     root@localhost   }   notification_email_from keepalived@localhost   smtp_server 127.0.0.1    smtp_connect_timeout 10   router_id node1vrrp_mcast_group4 224.0.0.223}vrrp_instance VI_1 {    state MASTER    interface ens33    virtual_router_id 51    priority 110    advert_int 1    authentication {        auth_type PASS        auth_pass JzvnmfkY     }    virtual_ipaddress {        192.168.0.200/24 dev ens33 label ens33:1    }notify_master "/etc/keepalived/notify1.sh master"notify_backup "/etc/keepalived/notify1.sh backup"notify_fault "/etc/keepalived/notify1.sh fault"}virtual_server 192.168.0.200 80 {    delay_loop 3    lb_algo wrr    lb_kind DR    protocol TCP    sorry_server 127.0.0.1 80    real_server 192.168.0.3 80 {        weight 2        HTTP_GET {            url {              path /              status_code 200            }            connect_timeout 3            nb_get_retry 3            delay_before_retry 3        }    }    real_server 192.168.0.4 80 {        weight 1        HTTP_GET {            url {              path /              status_code 200            }            connect_timeout 3            nb_get_retry 3            delay_before_retry 3        }}}vrrp_instance VI_2 {    state BACKUP    interface ens33    virtual_router_id 52    priority 90    advert_int 1    authentication {        auth_type PASS        auth_pass JzvnmfkY     }    virtual_ipaddress {        192.168.0.201/24 dev ens33 label ens33:2    }notify_master "/etc/keepalived/notify2.sh master"notify_backup "/etc/keepalived/notify2.sh backup"notify_fault "/etc/keepalived/notify2.sh fault"}virtual_server 192.168.0.201 80 {    delay_loop 3    lb_algo wrr    lb_kind DR    protocol TCP    sorry_server 127.0.0.1 80    real_server 192.168.0.3 80 {        weight 1        HTTP_GET {            url {              path /              status_code 200            }            connect_timeout 3            nb_get_retry 3            delay_before_retry 3        }    }    real_server 192.168.0.4 80 {        weight 2        HTTP_GET {            url {              path /              status_code 200            }            connect_timeout 3            nb_get_retry 3            delay_before_retry 3        }}}

通知脚本配置

脚本1

[root@node1 keepalived]# cat notify1.sh #!/bin/bash#description: An example of notify script#vip=192.168.0.200contact='root@localhost'notify(){local mailsubject="$(hostname) to be $1:$vip floating"local mailbody="$(date +'%F %T'):vrrp1 transition,$(hostname) changed to be $1"echo "$mailbody" | mail -s "$mailsubject" $contact}case $1 inmaster)notify master;;backup)notify backup;;fault)notify fault;;*)echo "Usage:$(basename $0) {master|backup|fault}"exit 1;;esac

脚本2

[root@node1 keepalived]# cat notify2.sh #!/bin/bash#description: An example of notify script#vip=192.168.0.201contact='root@localhost'notify(){local mailsubject="$(hostname) to be $1:$vip floating"local mailbody="$(date +'%F %T'):vrrp2 transition,$(hostname) changed to be $1"echo "$mailbody" | mail -s "$mailsubject" $contact}case $1 inmaster)notify master;;backup)notify backup;;fault)notify fault;;*)echo "Usage:$(basename $0) {master|backup|fault}"exit 1;;esac

ipvsadm规则查看

[root@node1 keepalived]# ipvsadm -lnIP Virtual Server version 1.2.1 (size=4096)Prot LocalAddress:Port Scheduler Flags  -> RemoteAddress:Port           Forward Weight ActiveConn InActConnTCP  192.168.0.200:80 wrr  -> 192.168.0.3:80               Route   2      0          0           -> 192.168.0.4:80               Route   1      0          0         TCP  192.168.0.201:80 wrr  -> 192.168.0.3:80               Route   1      0          0           -> 192.168.0.4:80               Route   2      0          0

调度器B配置

主要操作：ip配置，时间同步、hosts文件更改，修改主机名（确保主从节点能够通信）、keepalived.conf配置文件更改，通知脚本配置(两个脚本)，ipvsadm规则查看

ip配置

[root@node2 keepalived]# ip a1: lo:  mtu 65536 qdisc noqueue state UNKNOWN qlen 1    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00    inet 127.0.0.1/8 scope host lo       valid_lft forever preferred_lft forever    inet6 ::1/128 scope host        valid_lft forever preferred_lft forever2: ens33:  mtu 1500 qdisc pfifo_fast state UP qlen 1000    link/ether 00:0c:29:3f:e3:9e brd ff:ff:ff:ff:ff:ff    inet 192.168.0.8/24 brd 192.168.0.255 scope global ens33       valid_lft forever preferred_lft forever    inet 192.168.0.201/24 scope global secondary ens33:2       valid_lft forever preferred_lft forever    inet6 fe80::20c:29ff:fe3f:e39e/64 scope link        valid_lft forever preferred_lft forever

时间同步

ntpdate ntp-server-ip

hosts文件更改

[root@node2 keepalived]# cat /etc/hosts127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4 node2::1         localhost localhost.localdomain localhost6 localhost6.localdomain6 node2192.168.0.7 node1192.168.0.8 node2

主机名修改

hostnamectl set-hostname node2

keepalived.conf配置文件更改

[root@localhost keepalived]# cat keepalived.conf ! Configuration File for keepalivedglobal_defs {   notification_email {     root@localhost   }   notification_email_from keepalived@localhost   smtp_server 127.0.0.1    smtp_connect_timeout 10   router_id node2vrrp_mcast_group4 224.0.0.223}vrrp_instance VI_1 {    state BACKUP    interface ens33    virtual_router_id 51    priority 100    advert_int 1    authentication {        auth_type PASS        auth_pass JzvnmfkY     }    virtual_ipaddress {        192.168.0.200/24 dev ens33 label ens33:1    }        notify_master "/etc/keepalived/notify1.sh master"        notify_backup "/etc/keepalived/notify1.sh backup"        notify_fault "/etc/keepalived/notify1.sh fault"}virtual_server 192.168.0.200 80 {    delay_loop 3    lb_algo wrr    lb_kind DR    protocol TCPsorry_server 127.0.0.1 80    real_server 192.168.0.3 80 {        weight 2        HTTP_GET {            url {              path /              status_code 200            }            connect_timeout 3            nb_get_retry 3            delay_before_retry 3        }    }    real_server 192.168.0.4 80 {        weight 1        HTTP_GET {            url {              path /              status_code 200            }            connect_timeout 3            nb_get_retry 3            delay_before_retry 3        }}}vrrp_instance VI_2 {    state MASTER    interface ens33    virtual_router_id 52    priority 100    advert_int 1    authentication {        auth_type PASS        auth_pass JzvnmfkY    }    virtual_ipaddress {        192.168.0.201/24 dev ens33 label ens33:2    }        notify_master "/etc/keepalived/notify2.sh master"        notify_backup "/etc/keepalived/notify2.sh backup"        notify_fault "/etc/keepalived/notify2.sh fault"}virtual_server 192.168.0.201 80 {    delay_loop 3    lb_algo wrr    lb_kind DR    protocol TCPsorry_server 127.0.0.1 80    real_server 192.168.0.3 80 {        weight 1        HTTP_GET {            url {              path /              status_code 200            }              status_code 200            }            connect_timeout 3            nb_get_retry 3            delay_before_retry 3        }    }    real_server 192.168.0.4 80 {        weight 2        HTTP_GET {            url {              path /              status_code 200            }            connect_timeout 3            nb_get_retry 3            delay_before_retry 3        }}}

通知脚本配置(同调度器A的脚本一致)

脚本1

[root@node2 keepalived]# cat notify1.sh #!/bin/bash#description: An example of notify script#vip=192.168.0.200contact='root@localhost'notify(){local mailsubject="$(hostname) to be $1:$vip floating"local mailbody="$(date +'%F %T'):vrrp1 transition,$(hostname) changed to be $1"echo "$mailbody" | mail -s "$mailsubject" $contact}case $1 inmaster)notify master;;backup)notify backup;;fault)notify fault;;*)echo "Usage:$(basename $0) {master|backup|fault}"exit 1;;esac

脚本2

[root@node2 keepalived]# cat notify2.sh #!/bin/bash#description: An example of notify script#vip=192.168.0.201contact='root@localhost'notify(){local mailsubject="$(hostname) to be $1:$vip floating"local mailbody="$(date +'%F %T'):vrrp2 transition,$(hostname) changed to be $1"echo "$mailbody" | mail -s "$mailsubject" $contact}case $1 inmaster)notify master;;backup)notify backup;;fault)notify fault;;*)echo "Usage:$(basename $0) {master|backup|fault}"exit 1;;esac

web服务器A配置

ip配置

1: lo:  mtu 65536 qdisc noqueue state UNKNOWN qlen 1    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00    inet 127.0.0.1/8 scope host lo       valid_lft forever preferred_lft forever    inet 192.168.0.201/32 brd 192.168.0.201 scope global lo:1       valid_lft forever preferred_lft forever    inet 192.168.0.200/32 brd 192.168.0.200 scope global lo:0       valid_lft forever preferred_lft forever    inet6 ::1/128 scope host        valid_lft forever preferred_lft forever2: ens33:  mtu 1500 qdisc pfifo_fast state UP qlen 1000    link/ether 00:0c:29:ab:50:14 brd ff:ff:ff:ff:ff:ff    inet 192.168.0.4/24 brd 192.168.0.255 scope global ens33       valid_lft forever preferred_lft forever    inet6 fe80::20c:29ff:feab:5014/64 scope link        valid_lft forever preferred_lft forever

lvs-dr-预配置脚本

脚本1

[root@localhost ~]# cat vip200-setrs.sh #!/bin/bash#vip=192.168.0.200mask='255.255.255.255'case $1 instart)echo 1 > /proc/sys/net/ipv4/conf/all/arp_ignoreecho 1 > /proc/sys/net/ipv4/conf/lo/arp_ignoreecho 2 > /proc/sys/net/ipv4/conf/all/arp_announceecho 2 > /proc/sys/net/ipv4/conf/lo/arp_announceifconfig lo:0 $vip netmask $mask broadcast $vip uproute add -host $vip dev lo:0;;stop)ifconfig lo:0 downecho 0 > /proc/sys/net/ipv4/conf/all/arp_ignoreecho 0 > /proc/sys/net/ipv4/conf/lo/arp_ignoreecho 0 > /proc/sys/net/ipv4/conf/all/arp_announceecho 0 > /proc/sys/net/ipv4/conf/lo/arp_announce;;*) echo "Usage $(basename $0) start|stop"exit 1;;esac

脚本2

[root@localhost ~]# cat vip201-setrs.sh #!/bin/bash#vip=192.168.0.201mask='255.255.255.255'case $1 instart)echo 1 > /proc/sys/net/ipv4/conf/all/arp_ignoreecho 1 > /proc/sys/net/ipv4/conf/lo/arp_ignoreecho 2 > /proc/sys/net/ipv4/conf/all/arp_announceecho 2 > /proc/sys/net/ipv4/conf/lo/arp_announceifconfig lo:1 $vip netmask $mask broadcast $vip uproute add -host $vip dev lo:1;;stop)ifconfig lo:1 downecho 0 > /proc/sys/net/ipv4/conf/all/arp_ignoreecho 0 > /proc/sys/net/ipv4/conf/lo/arp_ignoreecho 0 > /proc/sys/net/ipv4/conf/all/arp_announceecho 0 > /proc/sys/net/ipv4/conf/lo/arp_announce;;*) echo "Usage $(basename $0) start|stop"exit 1;;esac

web服务器B配置

ip配置

[root@localhost ~]# ip a1: lo:  mtu 65536 qdisc noqueue state UNKNOWN qlen 1    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00    inet 127.0.0.1/8 scope host lo       valid_lft forever preferred_lft forever    inet 192.168.0.201/32 brd 192.168.0.201 scope global lo:1       valid_lft forever preferred_lft forever    inet 192.168.0.200/32 brd 192.168.0.200 scope global lo:0       valid_lft forever preferred_lft forever    inet6 ::1/128 scope host        valid_lft forever preferred_lft forever2: ens33:  mtu 1500 qdisc pfifo_fast state UP qlen 1000    link/ether 00:0c:29:ab:50:14 brd ff:ff:ff:ff:ff:ff    inet 192.168.0.4/24 brd 192.168.0.255 scope global ens33       valid_lft forever preferred_lft forever    inet6 fe80::20c:29ff:feab:5014/64 scope link        valid_lft forever preferred_lft forever

lvs-dr-预设脚本

脚本内容同web服务A相同，拷贝过去即可

vip200-setrs.sh vip201-setrs.sh

客户端测试

ip配置

[root@localhost ~]# ip a

1: lo:  mtu 65536 qdisc noqueue state UNKNOWN qlen 1    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00    inet 127.0.0.1/8 scope host lo       valid_lft forever preferred_lft forever    inet6 ::1/128 scope host        valid_lft forever preferred_lft forever2: ens33:  mtu 1500 qdisc pfifo_fast state UP qlen 1000    link/ether 00:0c:29:d0:37:77 brd ff:ff:ff:ff:ff:ff    inet 192.168.0.14/24 brd 192.168.0.255 scope global ens33       valid_lft forever preferred_lft forever    inet6 fe80::20c:29ff:fed0:3777/64 scope link        valid_lft forever preferred_lft forever

curl测试

 [root@localhost ~]# for i in {1..10};do curl http://192.168.0.200;donebackend server1backend server1backend server2backend server1backend server1backend server2backend server1backend server1backend server2backend server1[root@localhost ~]# for i in {1..10};do curl http://192.168.0.201;donebackend server1backend server2backend server2backend server1backend server2backend server2backend server1backend server2backend server2backend server1

四、健康状态查看以及故障排查参考方式

方式1：查看keepalived的切换过程

systemctl status keepalived

方式2：mail命令查看邮件

方式3：查看web服务器日志

tail /var/log/httpd/access_log

tail /var/log/httpd/error_log

五、模拟故障

1.模拟调度器B故障

调度器B上操作

停止keepalived服务

systemctl stop keepalived[root@node2 keepalived]# systemctl status keepalived #分析以下信息，VIP2已移除Jul 02 10:18:53 node2 systemd[1]: Stopping LVS and VRRP High Availability Monitor...Jul 02 10:18:53 node2 Keepalived_vrrp[50773]: VRRP_Instance(VI_2) sending 0 priorityJul 02 10:18:53 node2 Keepalived_vrrp[50773]: VRRP_Instance(VI_2) removing protocol VIPs.Jul 02 10:18:53 node2 systemd[1]: Stopped LVS and VRRP High Availability Monitor.

查看ip

[root@node2 keepalived]# ip a           #VIP2移除1: lo:  mtu 65536 qdisc noqueue state UNKNOWN qlen 1    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00    inet 127.0.0.1/8 scope host lo       valid_lft forever preferred_lft forever    inet6 ::1/128 scope host        valid_lft forever preferred_lft forever2: ens33:  mtu 1500 qdisc pfifo_fast state UP qlen 1000    link/ether 00:0c:29:3f:e3:9e brd ff:ff:ff:ff:ff:ff    inet 192.168.0.8/24 brd 192.168.0.255 scope global ens33       valid_lft forever preferred_lft forever    inet6 fe80::20c:29ff:fe3f:e39e/64 scope link        valid_lft forever preferred_lft forever

调度器A操作

[root@node1 keepalived]# systemctl status keepalived #分析以下信息，可知VIP漂移到调度A● keepalived.service - LVS and VRRP High Availability Monitor   Loaded: loaded (/usr/lib/systemd/system/keepalived.service; enabled; vendor preset: disabled)   Active: active (running) since Sun 2017-07-02 10:07:36 CST; 17min ago  Process: 20019 ExecStart=/usr/sbin/keepalived $KEEPALIVED_OPTIONS (code=exited, status=0/SUCCESS) Main PID: 20020 (keepalived)   CGroup: /system.slice/keepalived.service           ├─20020 /usr/sbin/keepalived -D           ├─20021 /usr/sbin/keepalived -D           └─20022 /usr/sbin/keepalived -DJul 02 10:07:37 node1 Keepalived_vrrp[20022]: Opening script file /etc/keepalived/notify1.shJul 02 10:07:37 node1 Keepalived_healthcheckers[20021]: Netlink reflector reports IP 192.168.0.200 addedJul 02 10:07:42 node1 Keepalived_vrrp[20022]: VRRP_Instance(VI_1) Sending gratuitous ARPs on ens33 for 192.168.0.200Jul 02 10:18:54 node1 Keepalived_vrrp[20022]: VRRP_Instance(VI_2) Transition to MASTER STATEJul 02 10:18:55 node1 Keepalived_vrrp[20022]: VRRP_Instance(VI_2) Entering MASTER STATEJul 02 10:18:55 node1 Keepalived_vrrp[20022]: VRRP_Instance(VI_2) setting protocol VIPs.Jul 02 10:18:55 node1 Keepalived_vrrp[20022]: VRRP_Instance(VI_2) Sending gratuitous ARPs on ens33 for 192.168.0.201Jul 02 10:18:55 node1 Keepalived_vrrp[20022]: Opening script file /etc/keepalived/notify2.shJul 02 10:18:55 node1 Keepalived_healthcheckers[20021]: Netlink reflector reports IP 192.168.0.201 addedJul 02 10:19:00 node1 Keepalived_vrrp[20022]: VRRP_Instance(VI_2) Sending gratuitous ARPs on ens33 for 192.168.0.201

查看邮件

[root@node1 keepalived]# mail        #node1成为VIP192.168.0.201的主节点Heirloom Mail version 12.5 7/5/10.  Type ? for help."/var/spool/mail/root": 1 message>   1 root                  Sun Jul  2 10:18  19/702   "node1 to be master:192.168.0.201 floating"& 1  Message  1:From root@node1.localdomain  Sun Jul  2 10:18:55 2017Return-Path: X-Original-To: root@localhostDelivered-To: root@localhost.localdomainDate: Sun, 02 Jul 2017 10:18:55 +0800To: root@localhost.localdomainSubject: node1 to be master:192.168.0.201 floatingUser-Agent: Heirloom mailx 12.5 7/5/10Content-Type: text/plain; charset=us-asciiFrom: root@node1.localdomain (root)Status: RO2017-07-02 10:18:55:vrrp2 transition,node1 changed to be master

2.模拟web服务器A故障(RS1)

webA上操作

[root@localhost ~]# systemctl stop httpd

调度器A上操作

查看邮件

[root@node1 keepalived]# mail #分析以下信息，可知RS1宕机Heirloom Mail version 12.5 7/5/10.  Type ? for help."/var/spool/mail/root": 4 messages 2 new    1 root                  Sun Jul  2 10:18  19/702   "node1 to be master:192.168.0.201 floating"    2 root                  Sun Jul  2 10:28  19/702   "node1 to be backup:192.168.0.201 floating">N  3 keepalived@localhost  Sun Jul  2 10:28  17/642   "[node1] Realserver [192.168.0.3]:80 - DOWN" N  4 keepalived@localhost  Sun Jul  2 10:28  17/642   "[node1] Realserver [192.168.0.3]:80 - DOWN"

客户端请求查看

[root@localhost ~]# curl http://192.168.0.200 #只能访问到RS2backend server2

调度器B上操作

[root@node2 keepalived]# mail #分析以下信息，可知RS1宕机Heirloom Mail version 12.5 7/5/10.  Type ? for help."/var/spool/mail/root": 4 messages 2 new    1 root                  Sun Jul  2 10:28  19/702   "node2 to be backup:192.168.0.200 floating"    2 root                  Sun Jul  2 10:28  19/702   "node2 to be master:192.168.0.201 floating">N  3 keepalived@localhost  Sun Jul  2 10:28  17/642   "[node2] Realserver [192.168.0.3]:80 - DOWN" N  4 keepalived@localhost  Sun Jul  2 10:28  17/642   "[node2] Realserver [192.168.0.3]:80 - DOWN"

3.模拟web服务双机故障

RS1和RS2停止web服务

调度器A上操作

查看邮件 #分析以下信息，可知双机宕机

    [root@node1 keepalived]# mailHeirloom Mail version 12.5 7/5/10.  Type ? for help."/var/spool/mail/root": 6 messages 2 new    1 root                  Sun Jul  2 10:18  19/702   "node1 to be master:192.168.0.201 floating"    2 root                  Sun Jul  2 10:28  19/702   "node1 to be backup:192.168.0.201 floating"    3 keepalived@localhost  Sun Jul  2 10:28  18/653   "[node1] Realserver [192.168.0.3]:80 - DOWN"    4 keepalived@localhost  Sun Jul  2 10:28  18/653   "[node1] Realserver [192.168.0.3]:80 - DOWN">N  5 keepalived@localhost  Sun Jul  2 10:36  17/642   "[node1] Realserver [192.168.0.4]:80 - DOWN" N  6 keepalived@localhost  Sun Jul  2 10:36  17/642   "[node1] Realserver [192.168.0.4]:80 - DOWN"

查看keepalived状态

[root@node1 keepalived]# systemctl status keepalived    #分析以下信息，双机宕机，启动sorry服务器  ● keepalived.service - LVS and VRRP High Availability Monitor   Loaded: loaded (/usr/lib/systemd/system/keepalived.service; enabled; vendor preset: disabled)   Active: active (running) since Sun 2017-07-02 10:07:36 CST; 30min ago  Process: 20019 ExecStart=/usr/sbin/keepalived $KEEPALIVED_OPTIONS (code=exited, status=0/SUCCESS) Main PID: 20020 (keepalived)   CGroup: /system.slice/keepalived.service           ├─20020 /usr/sbin/keepalived -D           ├─20021 /usr/sbin/keepalived -D           └─20022 /usr/sbin/keepalived -DJul 02 10:36:31 node1 Keepalived_healthcheckers[20021]: Removing alive servers from the pool for VS [192.168.0.200]:80Jul 02 10:36:31 node1 Keepalived_healthcheckers[20021]: Remote SMTP server [127.0.0.1]:25 connected.Jul 02 10:36:31 node1 Keepalived_healthcheckers[20021]: SMTP alert successfully sent.Jul 02 10:36:32 node1 Keepalived_healthcheckers[20021]: Error connecting server [192.168.0.4]:80.Jul 02 10:36:32 node1 Keepalived_healthcheckers[20021]: Removing service [192.168.0.4]:80 from VS [192.168.0.201]:80Jul 02 10:36:32 node1 Keepalived_healthcheckers[20021]: Lost quorum 1-0=1 > 0 for VS [192.168.0.201]:80Jul 02 10:36:32 node1 Keepalived_healthcheckers[20021]: Adding sorry server [127.0.0.1]:80 to VS [192.168.0.201]:80Jul 02 10:36:32 node1 Keepalived_healthcheckers[20021]: Removing alive servers from the pool for VS [192.168.0.201]:80Jul 02 10:36:32 node1 Keepalived_healthcheckers[20021]: Remote SMTP server [127.0.0.1]:25 connected.Jul 02 10:36:32 node1 Keepalived_healthcheckers[20021]: SMTP alert successfully sent.

客户端请求

[root@localhost ~]# curl http://192.168.0.201        #请求至sorry服务器的web页面sorry server[root@localhost ~]# curl http://192.168.0.200sorry server

看了以上关于实现keepalived双主模型lvs高可用集群的实验总结，如果大家还有什么地方需要了解的可以在行业资讯里查找自己感兴趣的或者找我们的专业技术工程师解答的，技术工程师在行业内拥有十几年的经验了。