Centos7+LVS-DR+keepalived实验(包含sorry-server、日志、及HTTP-GET的健康检测),LVS负载均衡原理,高可用实现KeepAlived原理简介

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2019-7-23

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一、简介

  1、lvs-dr原理请参考原理篇

    LVS负载均衡原理

  2、keepalived原理请参考原理篇

    高可用实现KeepAlived原理简介

  3、基于lvs-dr+keepalived故障切换架构图如下:

   

二、部署

  1、环境

lvs+keepalive+sorr-server+监控检测

web1 lvs+keepalived 192.168.216.51
web2 lvs+keepalived 192.168.216.52
web3 web 192.168.216.53
web4 web 192.168.216.54
client 物理机  

  

  注意:确保每台机器防火墙、selinux关闭,时间同步

  2、准备RS的web服务,这里安装httpd

    web3/web4

    yum install httpd -y 

    web3

    echo “welcome to web3”  >/var/www/html/index.html

    systemctl start httpd 

    systemctl enable httpd

    web4

    echo “welcome to web4”  >/var/www/html/index.html

    systemctl start httpd

    systemctl enable httpd

    互相访问一下,在客户机浏览器上也访问一下

1 [root@web3 ~]# curl 192.168.216.54
2 welcome to web4
3 [root@web3 ~]# 
4 
5 [root@web4 ~]# curl 192.168.216.54
6 welcome to web4
7 [root@web4 ~]# 

    

  

    arp抑制的意义 ,修改的应答级别

      

       arp_ignore 改为1的意义是,响应报文,请求报文从哪个地址进来的,就只能这个接口地址响应

       arp_announce 改为2的意义是通知,不通告不同网段

 

    脚本实现:web3/web4,都运行一下

 1 [root@web3 ~]# cd /arp
 2 [root@web3 arp]# ll 
 3 total 4
 4 -rwxr-xr-x. 1 root root 469 Apr 23 16:04 arp.sh
 5 [root@web3 arp]# cat arp.sh 
 6 #!/bin/bash
 7 case $1 in
 8 start)
 9         echo 1 >/proc/sys/net/ipv4/conf/all/arp_ignore
10         echo 1 >/proc/sys/net/ipv4/conf/lo/arp_ignore
11         echo 2 >/proc/sys/net/ipv4/conf/all/arp_announce
12         echo 2 >/proc/sys/net/ipv4/conf/lo/arp_announce
13         ;;
14 stop)
15         echo 0 >/proc/sys/net/ipv4/conf/all/arp_ignore
16         echo 0 >/proc/sys/net/ipv4/conf/lo/arp_ignore
17         echo 0 >/proc/sys/net/ipv4/conf/all/arp_announce
18         echo 0 >/proc/sys/net/ipv4/conf/lo/arp_announce
19         ;;
20 esac
21 
22 
23 [root@web3 arp]# chmod +x arp.sh 
24 [root@web3 arp]# ./arp.sh 

  4、RS配置VIP接口

    web3/web4 同时配置

    首先几个问题解释一下:

      为什么配置到lo接口

        既然需要rs能够处理目标地址的vip的ip报文,首先需要接收这个包,在lo上配置vip就能够完全接收包并将结果返回client

        配置到其他网卡上,会影响客户端的arp request,影响arp表,从而影响负载均衡

      为什么是rs的掩码是255.255.255.255

        由于rs的vip不对外通信,用做侦首部,所以一定要设置位32位掩码

      

    

 1  ifconfig lo:0 192.168.216.200 netmask 255.255.255.255 broadcast 192.168.216.200 up
 2  route add -host 192.168.216.200 dev lo:0
 3 
 4 [root@web3 arp]# route -n 
 5 Kernel IP routing table
 6 Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
 7 0.0.0.0         192.168.216.2   0.0.0.0         UG    100    0        0 ens33
 8 192.168.122.0   0.0.0.0         255.255.255.0   U     0      0        0 virbr0
 9 192.168.216.0   0.0.0.0         255.255.255.0   U     100    0        0 ens33
10 192.168.216.200 0.0.0.0         255.255.255.255 UH    0      0        0 lo

  5、准备director的ipvsadm

    web1/web2

   yum install ipvsadm -y

1 [root@web2 keepalived]# ipvsadm -C  
2 [root@web2 keepalived]# ipvsadm -A -t 192.168.216.200:80 -s rr
3 [root@web2 keepalived]# ipvsadm -a -t 192.168.216.200:80 -r 192.168.216.53 -g -w 1 
4 [root@web2 keepalived]# ipvsadm -a -t 192.168.216.200:80 -r 192.168.216.54 -g -w 2

  6、sorry-server的配置

    web1/web2-安装web软件

     yum install nginx -y

    web1-

       echo “sorry,under maintanance #####web1” >/usr/share/nginx/html/index.html

    web2 

       echo “sorry,under maintanance #####web2”  >/usr/share/nginx/html/index.html

    web1/web2

      systemctl start nginx

      systemctl enable nginx

    客户端访问web应用是否正常

      后面在keepalived配置文件virtual_server区域添加sorry_server 127.0.0.1 80

  7、配置keepalived,及基于HTTP-GET做监控检测

    web1/web2-安装软件

      yum install keepalived -y 

    web1-master配置

  1 [root@web1 keepalived]# cat keepalived.conf 
  2 ! Configuration File for keepalived
  3 
  4 global_defs {
  5 #   notification_email {
  6 #     acassen@firewall.loc
  7 #     failover@firewall.loc
  8 #     sysadmin@firewall.loc
  9 #   }
 10 #   notification_email_from Alexandre.Cassen@firewall.loc
 11 #   smtp_server 192.168.200.1
 12 #   smtp_connect_timeout 30
 13    router_id LVS_DEVEL
 14 #   vrrp_skip_check_adv_addr
 15 #   vrrp_strict
 16 #   vrrp_garp_interval 0
 17 #   vrrp_gna_interval 0
 18 }
 19 vrrp_script chk_maintanance {
 20 
 21         script "/etc/keepalived/chkdown.sh"
 22         interval 1
 23         weight -20
 24 }
 25 #vrrp_script chk_nginx {
 26 #       script "/etc/keepalived/chknginx.sh"
 27 #       interval 1
 28 #       weight -20
 29 #}
 30 
 31 #VIP1
 32 vrrp_instance VI_1 {
 33     state MASTER
 34     interface ens33
 35     virtual_router_id 50
 36     priority 100
 37     advert_int 1
 38     authentication {
 39         auth_type PASS
 40         auth_pass 1111
 41     }
 42     virtual_ipaddress {
 43         192.168.216.200
 44     }
 45     track_script {
 46         chk_maintanance
 47     }
 48 #    track_script {
 49 #       chk_nginx
 50 #    }
 51 }
 52 #VIP2
 53 #vrrp_instance VI_2 {
 54 #    state BAKCUP
 55 #    interface ens33
 56 #    virtual_router_id 51
 57 #    priority 90
 58 #    advert_int 1
 59 #    authentication {
 60 #        auth_type PASS
 61 #        auth_pass 1111
 62 #    }
 63 #    virtual_ipaddress {
 64 #        192.168.216.210
 65 #    }
 66 #    track_script {
 67 #       chk_maintanance
 68 #    }
 69 #    track_script {
 70 #       chk_nginx
 71 #    }
 72 #}
 73 
 74 virtual_server 192.168.216.200 80{
 75         delay_loop 6                        
 76         lb_algo wrr
 77         lb_kind DR
 78         nat_mask 255.255.0.0
 79         protocol TCP
 80 
 81         real_server 192.168.216.53 80 {                
 82         weight 1
 83         HTTP_GET {                          
 84                 url {
 85                 path /
 86                 status_code 200
 87                   }
 88                 connect_timeout 3
 89                 nb_get_retry 3
 90                 delay_before_retry 3
 91                 }
 92         }
 93 
 94         real_server 192.168.216.54 80 {
 95                 weight 2
 96         HTTP_GET {
 97                 url {
 98                 path /
 99                 status_code 200
100                   }
101                 connect_timeout 3
102                 nb_get_retry 3
103                 delay_before_retry 3
104                 }
105         }
106 }

    web2-backup配置

   

  1 [root@web2 keepalived]# cat keepalived.conf 
  2 ! Configuration File for keepalived
  3 
  4 global_defs {
  5 #   notification_email {
  6 #     acassen@firewall.loc
  7 #     failover@firewall.loc
  8 #     sysadmin@firewall.loc
  9 #   }
 10 #   notification_email_from Alexandre.Cassen@firewall.loc
 11 #   smtp_server 192.168.200.1
 12 #   smtp_connect_timeout 30
 13    router_id LVS_DEVEL1
 14 #   vrrp_skip_check_adv_addr
 15 #   vrrp_strict
 16  #  vrrp_garp_interval 0
 17   # vrrp_gna_interval 0
 18 }
 19 vrrp_script chk_maintanance {                        #这里是脚本通过实现动态切换在Centos7+nginx+keepalived集群及双主架构案例文章有介绍
 20         script "/etc/keepalived/chkdown.sh”
 21         interval 1
 22         weight -20
 23 }
 24 
 25 vrrp_script chk_nginx {
 26         script "/etc/keepalived/chknginx.sh"
 27         interval 1
 28         weight -20
 29 }
 30 
 31 #VIP1
 32 vrrp_instance VI_1 {
 33     state BACKUP
 34     interface ens33
 35     virtual_router_id 50
 36     priority 90
 37     advert_int 1
 38     authentication {
 39         auth_type PASS
 40         auth_pass 1111
 41     }
 42     virtual_ipaddress {
 43         192.168.216.200
 44     }
 45     track_script {
 46         chk_maintanance
 47     }
 48 #    track_script {
 49 #       chk_nginx
 50 #    }
 51 }
 52 
 53 #VIP2
 54 #vrrp_instance VI_2 {
 55 #    state MASTER
 56 #    interface ens33
 57 #    virtual_router_id 51
 58 #    priority 100
 59 #    advert_int 1
 60 #    authentication {
 61 #        auth_type PASS
 62 #        auth_pass 1111
 63 #    }
 64 #    virtual_ipaddress {
 65 #        192.168.216.210
 66 #    }
 67 #    track_script {
 68 #        chk_maintanance
 69 #   }
 70 #    track_script {
 71 #       chk_nginx
 72 #   }
 73 #}
 74 
 75 virtual_server 192.168.216.200 80{         #vip区域 
 76         delay_loop 6              #延迟轮询时间
 77         lb_algo wrr               #后端算法
 78         lb_kind DR               #调度类型
 79         nat_mask 255.255.0.0         #
 80         protocol TCP              #监控服务协议类型
 81      sorry_server 127.0.0.1 80       #sorry-server
 82         real_server 192.168.216.53 80 {     #真实服务器
 83         weight 1                 #权重
 84         HTTP_GET {                 #健康检测方式 HTTP_GET|SSL_GET|TCP_CHECK|SMTP_CHECK|MISC_CHECK,这里用的HTTP_GET据说效率比TCP_CHECK高
 85                 url {
 86                 path /              #请求rs上的路径
 87                 status_code 200        #状态码检测
 88                   }
 89                 connect_timeout 3        #超时时长
 90                 nb_get_retry 3          #重复次数
91 delay_before_retry 3      #下次重试时间延迟 92 } 93 } 94      95 real_server 192.168.216.54 80 { 96 weight 2 97 HTTP_GET { 98 url { 99 path /                 100 status_code 200 101 } 102 connect_timeout 3 103 nb_get_retry 3 104 delay_before_retry 3 105 } 106 } 107 }

    添加keepalived ,down脚本

[root@web1 keepalived]#  cat chkdown.sh 
#!/bin/bash

[[ -f /etc/keepalived/down ]]&&exit 1 || exit 0

[root@web1 keepalived]# 

 

  8、开启日志功能

    vim /etc/sysconfig/keepalived

    KEEPALIVED_OPTIONS=”-D” 修改成KEEPALIVED_OPTIONS=”-D -d -S 0″

 1 [root@web1 keepalived]# cat /etc/sysconfig/keepalived 
 2 # Options for keepalived. See `keepalived --help' output and keepalived(8) and
 3 # keepalived.conf(5) man pages for a list of all options. Here are the most
 4 # common ones :
 5 #
 6 # --vrrp               -P    Only run with VRRP subsystem.
 7 # --check              -C    Only run with Health-checker subsystem.
 8 # --dont-release-vrrp  -V    Dont remove VRRP VIPs & VROUTEs on daemon stop.
 9 # --dont-release-ipvs  -I    Dont remove IPVS topology on daemon stop.
10 # --dump-conf          -d    Dump the configuration data.
11 # --log-detail         -D    Detailed log messages.
12 # --log-facility       -S    0-7 Set local syslog facility (default=LOG_DAEMON)
13 #
14 
15 KEEPALIVED_OPTIONS="-D -d -S 0"

    开启rsyslog

     vim /etc/rsyslog.conf

      #keepalived -S 0

      local0.*                                                /var/log/keepalived.log

    重启服务

      systemctl restart keepalived

      systemctl start rsyslog

      systemctl enable rsyslog

    

三、验证   

  1、验证keepalived

    web1上

      touch down

      ip a     #查看vip 消失

      rm -rf down

      ip a  #vip自动跳回    

 1 [root@web1 keepalived]# touch down
 2 [root@web1 keepalived]# ll 
 3 total 20
 4 -rwxr-xr-x 1 root root   62 Apr 19 12:45 chkdown.sh
 5 -rwxr-xr-x 1 root root  151 Apr 22 19:04 chkmysql.sh
 6 -rwxr-xr-x 1 root root  127 Apr 22 14:50 chknginx.sh
 7 -rw-r--r-- 1 root root    0 Apr 24 17:31 down
 8 -rw-r--r-- 1 root root 1877 Apr 24 17:08 keepalived.conf
 9 -rw-r--r-- 1 root root  494 Apr 19 12:09 notify.sh
10 [root@web1 keepalived]# ip a 
11 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1
12     link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
13     inet 127.0.0.1/8 scope host lo
14        valid_lft forever preferred_lft forever
15     inet6 ::1/128 scope host 
16        valid_lft forever preferred_lft forever
17 2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
18     link/ether 00:0c:29:1c:8b:39 brd ff:ff:ff:ff:ff:ff
19     inet 192.168.216.51/24 brd 192.168.216.255 scope global ens33
20        valid_lft forever preferred_lft forever
21     inet6 fe80::3409:e73d:1ef:2e1/64 scope link 
22        valid_lft forever preferred_lft forever
23 3: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN qlen 1000
24     link/ether 52:54:00:23:a5:7c brd ff:ff:ff:ff:ff:ff
25     inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
26        valid_lft forever preferred_lft forever
27 4: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast master virbr0 state DOWN qlen 1000
28     link/ether 52:54:00:23:a5:7c brd ff:ff:ff:ff:ff:ff
29 [root@web1 keepalived]# rm -rf downn
30 [root@web1 keepalived]# rm -rf down
31 [root@web1 keepalived]# ip a
32 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1
33     link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
34     inet 127.0.0.1/8 scope host lo
35        valid_lft forever preferred_lft forever
36     inet6 ::1/128 scope host 
37        valid_lft forever preferred_lft forever
38 2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
39     link/ether 00:0c:29:1c:8b:39 brd ff:ff:ff:ff:ff:ff
40     inet 192.168.216.51/24 brd 192.168.216.255 scope global ens33
41        valid_lft forever preferred_lft forever
42     inet6 fe80::3409:e73d:1ef:2e1/64 scope link 
43        valid_lft forever preferred_lft forever
44 3: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN qlen 1000
45     link/ether 52:54:00:23:a5:7c brd ff:ff:ff:ff:ff:ff
46     inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
47        valid_lft forever preferred_lft forever
48 4: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast master virbr0 state DOWN qlen 1000
49     link/ether 52:54:00:23:a5:7c brd ff:ff:ff:ff:ff:ff
50 [root@web1 keepalived]# ip a
51 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1
52     link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
53     inet 127.0.0.1/8 scope host lo
54        valid_lft forever preferred_lft forever
55     inet6 ::1/128 scope host 
56        valid_lft forever preferred_lft forever
57 2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
58     link/ether 00:0c:29:1c:8b:39 brd ff:ff:ff:ff:ff:ff
59     inet 192.168.216.51/24 brd 192.168.216.255 scope global ens33
60        valid_lft forever preferred_lft forever
61     inet 192.168.216.200/32 scope global ens33                            #vip自动跳回
62        valid_lft forever preferred_lft forever
63     inet6 fe80::3409:e73d:1ef:2e1/64 scope link 
64        valid_lft forever preferred_lft forever
65 3: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN qlen 1000
66     link/ether 52:54:00:23:a5:7c brd ff:ff:ff:ff:ff:ff
67     inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
68        valid_lft forever preferred_lft forever
69 4: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast master virbr0 state DOWN qlen 1000
70     link/ether 52:54:00:23:a5:7c brd ff:ff:ff:ff:ff:ff
71 [root@web1 keepalived]# 

  2、验证健康检测

    1)、首先检查一下ipvsadm,并访问

1 [root@web1 keepalived]# ipvsadm -L -n
2 IP Virtual Server version 1.2.1 (size=4096)
3 Prot LocalAddress:Port Scheduler Flags
4   -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
5 TCP  192.168.216.200:80 wrr
6   -> 192.168.216.53:80            Route   1      0          0         
7   -> 192.168.216.54:80            Route   2      0          0         
8 [root@web1 keepalived]# 

        正常状态

  

  2)、web3 停止httpd测试健康检测

    systemctl stop httpd

    web1上查看,ipvs策略已经剔除web3 ,日志文件也显示Removing service

1 [root@web1 keepalived]# ipvsadm -L -n 
2 IP Virtual Server version 1.2.1 (size=4096)
3 Prot LocalAddress:Port Scheduler Flags
4   -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
5 TCP  192.168.216.200:80 wrr
6   -> 192.168.216.54:80            Route   2      0          2        
 1 [root@web1 keepalived]# cat /var/log/keepalived.log  |tail -10
 2 Apr 24 17:32:08 web1 Keepalived_vrrp[50391]: Sending gratuitous ARP on ens33 for 192.168.216.200
 3 Apr 24 17:32:08 web1 Keepalived_vrrp[50391]: Sending gratuitous ARP on ens33 for 192.168.216.200
 4 Apr 24 17:32:08 web1 Keepalived_vrrp[50391]: Sending gratuitous ARP on ens33 for 192.168.216.200
 5 Apr 24 17:32:08 web1 Keepalived_vrrp[50391]: Sending gratuitous ARP on ens33 for 192.168.216.200
 6 Apr 24 17:40:34 web1 Keepalived_healthcheckers[50390]: Error connecting server [192.168.216.53]:80.
 7 Apr 24 17:40:37 web1 Keepalived_healthcheckers[50390]: Error connecting server [192.168.216.53]:80.
 8 Apr 24 17:40:40 web1 Keepalived_healthcheckers[50390]: Error connecting server [192.168.216.53]:80.
 9 Apr 24 17:40:43 web1 Keepalived_healthcheckers[50390]: Error connecting server [192.168.216.53]:80.
10 Apr 24 17:40:43 web1 Keepalived_healthcheckers[50390]: Check on service [192.168.216.53]:80 failed after 3 retry.
11 Apr 24 17:40:43 web1 Keepalived_healthcheckers[50390]: Removing service [192.168.216.53]:80 from VS [192.168.216.200]:80
12 [root@web1 keepalived]# 

      恢复web3的httpd

        systemctl start httpd

      web1上查看已经添加到负载均衡上,日志文件显示HTTP status code success 和adding service to VS

 1 [root@web1 keepalived]# ipvsadm -L -n               
 2 IP Virtual Server version 1.2.1 (size=4096)
 3 Prot LocalAddress:Port Scheduler Flags
 4   -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
 5 TCP  192.168.216.200:80 wrr
 6   -> 192.168.216.53:80            Route   1      0          0         
 7   -> 192.168.216.54:80            Route   2      0          0         
 8 [root@web1 keepalived]# cat /var/log/keepalived.log  |tail -10
 9 Apr 24 17:32:08 web1 Keepalived_vrrp[50391]: Sending gratuitous ARP on ens33 for 192.168.216.200
10 Apr 24 17:40:34 web1 Keepalived_healthcheckers[50390]: Error connecting server [192.168.216.53]:80.
11 Apr 24 17:40:37 web1 Keepalived_healthcheckers[50390]: Error connecting server [192.168.216.53]:80.
12 Apr 24 17:40:40 web1 Keepalived_healthcheckers[50390]: Error connecting server [192.168.216.53]:80.
13 Apr 24 17:40:43 web1 Keepalived_healthcheckers[50390]: Error connecting server [192.168.216.53]:80.
14 Apr 24 17:40:43 web1 Keepalived_healthcheckers[50390]: Check on service [192.168.216.53]:80 failed after 3 retry.
15 Apr 24 17:40:43 web1 Keepalived_healthcheckers[50390]: Removing service [192.168.216.53]:80 from VS [192.168.216.200]:80
16 Apr 24 17:44:37 web1 Keepalived_healthcheckers[50390]: HTTP status code success to [192.168.216.53]:80 url(1).
17 Apr 24 17:44:37 web1 Keepalived_healthcheckers[50390]: Remote Web server [192.168.216.53]:80 succeed on service.
18 Apr 24 17:44:37 web1 Keepalived_healthcheckers[50390]: Adding service [192.168.216.53]:80 to VS [192.168.216.200]:80
19 [root@web1 keepalived]# 

    

  3、验证sorry-server

    web3/web4

      systemctl stop httpd

    web1上查看

     

 1 [root@web1 keepalived]# cat /var/log/keepalived.log  |tail -10
 2 Apr 24 17:40:43 web1 Keepalived_healthcheckers[50390]: Error connecting server [192.168.216.53]:80.
 3 Apr 24 17:40:43 web1 Keepalived_healthcheckers[50390]: Check on service [192.168.216.53]:80 failed after 3 retry.
 4 Apr 24 17:40:43 web1 Keepalived_healthcheckers[50390]: Removing service [192.168.216.53]:80 from VS [192.168.216.200]:80
 5 Apr 24 17:44:37 web1 Keepalived_healthcheckers[50390]: HTTP status code success to [192.168.216.53]:80 url(1).
 6 Apr 24 17:44:37 web1 Keepalived_healthcheckers[50390]: Remote Web server [192.168.216.53]:80 succeed on service.
 7 Apr 24 17:44:37 web1 Keepalived_healthcheckers[50390]: Adding service [192.168.216.53]:80 to VS [192.168.216.200]:80
 8 Apr 24 17:47:31 web1 Keepalived_healthcheckers[50390]: Error connecting server [192.168.216.53]:80.
 9 Apr 24 17:47:34 web1 Keepalived_healthcheckers[50390]: Error connecting server [192.168.216.53]:80.
10 Apr 24 17:47:37 web1 Keepalived_healthcheckers[50390]: Error connecting server [192.168.216.53]:80.
11 Apr 24 17:47:37 web1 Keepalived_healthcheckers[50390]: Error connecting server [192.168.216.54]:80.
12 [root@web1 keepalived]# cat /var/log/keepalived.log  |tail -10
13 Apr 24 17:44:37 web1 Keepalived_healthcheckers[50390]: Adding service [192.168.216.53]:80 to VS [192.168.216.200]:80
14 Apr 24 17:47:31 web1 Keepalived_healthcheckers[50390]: Error connecting server [192.168.216.53]:80.
15 Apr 24 17:47:34 web1 Keepalived_healthcheckers[50390]: Error connecting server [192.168.216.53]:80.
16 Apr 24 17:47:37 web1 Keepalived_healthcheckers[50390]: Error connecting server [192.168.216.53]:80.
17 Apr 24 17:47:37 web1 Keepalived_healthcheckers[50390]: Error connecting server [192.168.216.54]:80.
18 Apr 24 17:47:40 web1 Keepalived_healthcheckers[50390]: Error connecting server [192.168.216.53]:80.
19 Apr 24 17:47:40 web1 Keepalived_healthcheckers[50390]: Check on service [192.168.216.53]:80 failed after 3 retry.
20 Apr 24 17:47:40 web1 Keepalived_healthcheckers[50390]: Removing service [192.168.216.53]:80 from VS [192.168.216.200]:80
21 Apr 24 17:47:40 web1 Keepalived_healthcheckers[50390]: Error connecting server [192.168.216.54]:80.
22 Apr 24 17:47:43 web1 Keepalived_healthcheckers[50390]: Error connecting server [192.168.216.54]:80.
23 [root@web1 keepalived]# cat /var/log/keepalived.log  |tail -10
24 Apr 24 17:47:40 web1 Keepalived_healthcheckers[50390]: Check on service [192.168.216.53]:80 failed after 3 retry.
25 Apr 24 17:47:40 web1 Keepalived_healthcheckers[50390]: Removing service [192.168.216.53]:80 from VS [192.168.216.200]:80
26 Apr 24 17:47:40 web1 Keepalived_healthcheckers[50390]: Error connecting server [192.168.216.54]:80.
27 Apr 24 17:47:43 web1 Keepalived_healthcheckers[50390]: Error connecting server [192.168.216.54]:80.
28 Apr 24 17:47:46 web1 Keepalived_healthcheckers[50390]: Error connecting server [192.168.216.54]:80.
29 Apr 24 17:47:46 web1 Keepalived_healthcheckers[50390]: Check on service [192.168.216.54]:80 failed after 3 retry.
30 Apr 24 17:47:46 web1 Keepalived_healthcheckers[50390]: Removing service [192.168.216.54]:80 from VS [192.168.216.200]:80
31 Apr 24 17:47:46 web1 Keepalived_healthcheckers[50390]: Lost quorum 1-0=1 > 0 for VS [192.168.216.200]:80
32 Apr 24 17:47:46 web1 Keepalived_healthcheckers[50390]: Adding sorry server [127.0.0.1]:80 to VS [192.168.216.200]:80
33 Apr 24 17:47:46 web1 Keepalived_healthcheckers[50390]: Removing alive servers from the pool for VS [192.168.216.200]:80

    日志显示,Adding sorry server

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作者:乐章