keepalive简单实验（一）

编程语言 2018-11-18 01:44:11 阅读次数: 0
版权声明：如需转载，请注明作者及出处 https://blog.csdn.net/qq_33317586/article/details/84178293

环境：centos7

node1:192.168.183.175

node2:192.168.183.176

前提：

1.node1与node2关闭selinux

2.node1与node2关闭firewall

3.node1和node2通过hosts互相解析对方IP

4.node1与node2可以互相通信（互相添加公钥）

5.配置好yum源

6.时间同步

一、安装keepalived

[root@node1 ~]# yum install -y keepalived
[root@node1 ~]# ssh node2 "yum install -y keepalived"

二、修改配置文件

node1

[root@node1 keepalived]# cat keepalived.conf | grep -v "#"
! Configuration File for keepalived

global_defs {
   notification_email {
    root@localhost 
   }
   notification_email_from kaadmin@localhost
   smtp_server 127.0.0.1
   smtp_connect_timeout 30
   router_id LVS_DEVEL
}

vrrp_instance VI_1 {
    state MASTER
    interface ens33
    virtual_router_id 51
    priority 100
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass reJggig
    }
    virtual_ipaddress {
       192.168.183.177 
    }
}

node2

[root@node2 keepalived]# cat keepalived.conf | grep -v "#"
! Configuration File for keepalived

global_defs {
   notification_email {
    root@localhost 
   }
   notification_email_from kaadmin@localhost
   smtp_server 127.0.0.1
   smtp_connect_timeout 30
   router_id node2
}

vrrp_instance VI_1 {
    state BACKUP
    interface ens33
    virtual_router_id 51
    priority 99
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass reJggig
    }
    virtual_ipaddress {
       192.168.183.177 
    }
}

三、启动keepalived

[root@node1 keepalived]# systemctl start keepalived.service
[root@node1 keepalived]# ssh node2 'systemctl start keepalived.service'

四、查看node1与node2的keepalived状态

[root@node1 keepalived]# systemctl status keepalived.service 
● keepalived.service - LVS and VRRP High Availability Monitor
   Loaded: loaded (/usr/lib/systemd/system/keepalived.service; disabled; vendor preset: disabled)
   Active: active (running) since 六 2018-11-17 15:01:08 CST; 2min 34s ago
  Process: 10708 ExecStart=/usr/sbin/keepalived $KEEPALIVED_OPTIONS (code=exited, status=0/SUCCESS)
 Main PID: 10709 (keepalived)
   CGroup: /system.slice/keepalived.service
           ├─10709 /usr/sbin/keepalived -D
           ├─10710 /usr/sbin/keepalived -D
           └─10711 /usr/sbin/keepalived -D

11月 17 15:01:10 node1 Keepalived_vrrp[10711]: Sending gratuitous ARP on ens33 for 192.168.183.177
11月 17 15:01:10 node1 Keepalived_vrrp[10711]: Sending gratuitous ARP on ens33 for 192.168.183.177
11月 17 15:01:10 node1 Keepalived_vrrp[10711]: Sending gratuitous ARP on ens33 for 192.168.183.177
11月 17 15:01:10 node1 Keepalived_vrrp[10711]: Sending gratuitous ARP on ens33 for 192.168.183.177
11月 17 15:01:15 node1 Keepalived_vrrp[10711]: Sending gratuitous ARP on ens33 for 192.168.183.177
11月 17 15:01:15 node1 Keepalived_vrrp[10711]: VRRP_Instance(VI_1) Sending/queueing gratuitous ARPs on ens33 for 192.168.183.177
11月 17 15:01:15 node1 Keepalived_vrrp[10711]: Sending gratuitous ARP on ens33 for 192.168.183.177
11月 17 15:01:15 node1 Keepalived_vrrp[10711]: Sending gratuitous ARP on ens33 for 192.168.183.177
11月 17 15:01:15 node1 Keepalived_vrrp[10711]: Sending gratuitous ARP on ens33 for 192.168.183.177
11月 17 15:01:15 node1 Keepalived_vrrp[10711]: Sending gratuitous ARP on ens33 for 192.168.183.177
[root@node1 keepalived]# ssh node2 'systemctl status keepalived.service'
● keepalived.service - LVS and VRRP High Availability Monitor
   Loaded: loaded (/usr/lib/systemd/system/keepalived.service; disabled; vendor preset: disabled)
   Active: active (running) since 六 2018-11-17 15:01:40 CST; 2min 6s ago
  Process: 10648 ExecStart=/usr/sbin/keepalived $KEEPALIVED_OPTIONS (code=exited, status=0/SUCCESS)
 Main PID: 10649 (keepalived)
   CGroup: /system.slice/keepalived.service
           ├─10649 /usr/sbin/keepalived -D
           ├─10650 /usr/sbin/keepalived -D
           └─10651 /usr/sbin/keepalived -D

11月 17 15:01:40 node2 Keepalived_healthcheckers[10650]: Initializing ipvs
11月 17 15:01:40 node2 Keepalived_vrrp[10651]: Registering Kernel netlink reflector
11月 17 15:01:40 node2 Keepalived_vrrp[10651]: Registering Kernel netlink command channel
11月 17 15:01:40 node2 Keepalived_vrrp[10651]: Registering gratuitous ARP shared channel
11月 17 15:01:40 node2 Keepalived_vrrp[10651]: Opening file '/etc/keepalived/keepalived.conf'.
11月 17 15:01:40 node2 Keepalived_vrrp[10651]: VRRP_Instance(VI_1) removing protocol VIPs.
11月 17 15:01:40 node2 Keepalived_vrrp[10651]: Using LinkWatch kernel netlink reflector...
11月 17 15:01:40 node2 Keepalived_vrrp[10651]: VRRP_Instance(VI_1) Entering BACKUP STATE
11月 17 15:01:40 node2 Keepalived_vrrp[10651]: VRRP sockpool: [ifindex(2), proto(112), unicast(0), fd(10,11)]
11月 17 15:01:40 node2 Keepalived_healthcheckers[10650]: Opening file '/etc/keepalived/keepalived.conf'.
[root@node1 keepalived]#

五、查看node1和node2的IP情况

[root@node1 keepalived]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    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 forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:0c:29:7d:cb:f8 brd ff:ff:ff:ff:ff:ff
    inet 192.168.183.175/24 brd 192.168.183.255 scope global noprefixroute ens33
       valid_lft forever preferred_lft forever
    inet 192.168.183.177/32 scope global ens33
       valid_lft forever preferred_lft forever
    inet6 fe80::20c:29ff:fe7d:cbf8/64 scope link 
       valid_lft forever preferred_lft forever
[root@node1 keepalived]# ssh node2 'ip a'
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    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 forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:0c:29:fb:3b:50 brd ff:ff:ff:ff:ff:ff
    inet 192.168.183.176/24 brd 192.168.183.255 scope global noprefixroute ens33
       valid_lft forever preferred_lft forever
    inet6 fe80::20c:29ff:fefb:3b50/64 scope link 
       valid_lft forever preferred_lft forever
[root@node1 keepalived]#

可以看到，VIP现在在node1上

六、手动停掉node1的keepalived服务

[root@node1 keepalived]# systemctl stop keepalived.service 
[root@node1 keepalived]# systemctl status keepalived.service 
● keepalived.service - LVS and VRRP High Availability Monitor
   Loaded: loaded (/usr/lib/systemd/system/keepalived.service; disabled; vendor preset: disabled)
   Active: inactive (dead)

11月 17 15:01:15 node1 Keepalived_vrrp[10711]: VRRP_Instance(VI_1) Sending/queueing gratuitous ARPs on ens33 for 192.168.183.177
11月 17 15:01:15 node1 Keepalived_vrrp[10711]: Sending gratuitous ARP on ens33 for 192.168.183.177
11月 17 15:01:15 node1 Keepalived_vrrp[10711]: Sending gratuitous ARP on ens33 for 192.168.183.177
11月 17 15:01:15 node1 Keepalived_vrrp[10711]: Sending gratuitous ARP on ens33 for 192.168.183.177
11月 17 15:01:15 node1 Keepalived_vrrp[10711]: Sending gratuitous ARP on ens33 for 192.168.183.177
11月 17 15:09:10 node1 Keepalived[10709]: Stopping
11月 17 15:09:10 node1 systemd[1]: Stopping LVS and VRRP High Availability Monitor...
11月 17 15:09:10 node1 Keepalived_vrrp[10711]: VRRP_Instance(VI_1) sent 0 priority
11月 17 15:09:10 node1 Keepalived_vrrp[10711]: VRRP_Instance(VI_1) removing protocol VIPs.
11月 17 15:09:11 node1 systemd[1]: Stopped LVS and VRRP High Availability Monitor.

七、观察node1与node2的IP情况

可以看到，VIP已经跑到node2上了

[root@node1 keepalived]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    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 forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:0c:29:7d:cb:f8 brd ff:ff:ff:ff:ff:ff
    inet 192.168.183.175/24 brd 192.168.183.255 scope global noprefixroute ens33
       valid_lft forever preferred_lft forever
    inet6 fe80::20c:29ff:fe7d:cbf8/64 scope link 
       valid_lft forever preferred_lft forever
[root@node1 keepalived]# ssh node2 'ip a'
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    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 forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:0c:29:fb:3b:50 brd ff:ff:ff:ff:ff:ff
    inet 192.168.183.176/24 brd 192.168.183.255 scope global noprefixroute ens33
       valid_lft forever preferred_lft forever
    inet 192.168.183.177/32 scope global ens33
       valid_lft forever preferred_lft forever
    inet6 fe80::20c:29ff:fefb:3b50/64 scope link 
       valid_lft forever preferred_lft forever

八、重新启动node1的keepalived

[root@node1 keepalived]# systemctl start keepalived.service 
[root@node1 keepalived]# systemctl status keepalived.service 
● keepalived.service - LVS and VRRP High Availability Monitor
   Loaded: loaded (/usr/lib/systemd/system/keepalived.service; disabled; vendor preset: disabled)
   Active: active (running) since 六 2018-11-17 15:15:59 CST; 7s ago
  Process: 10780 ExecStart=/usr/sbin/keepalived $KEEPALIVED_OPTIONS (code=exited, status=0/SUCCESS)
 Main PID: 10781 (keepalived)
   CGroup: /system.slice/keepalived.service
           ├─10781 /usr/sbin/keepalived -D
           ├─10782 /usr/sbin/keepalived -D
           └─10783 /usr/sbin/keepalived -D

11月 17 15:16:01 node1 Keepalived_vrrp[10783]: Sending gratuitous ARP on ens33 for 192.168.183.177
11月 17 15:16:01 node1 Keepalived_vrrp[10783]: Sending gratuitous ARP on ens33 for 192.168.183.177
11月 17 15:16:01 node1 Keepalived_vrrp[10783]: Sending gratuitous ARP on ens33 for 192.168.183.177
11月 17 15:16:01 node1 Keepalived_vrrp[10783]: Sending gratuitous ARP on ens33 for 192.168.183.177
11月 17 15:16:06 node1 Keepalived_vrrp[10783]: Sending gratuitous ARP on ens33 for 192.168.183.177
11月 17 15:16:06 node1 Keepalived_vrrp[10783]: VRRP_Instance(VI_1) Sending/queueing gratuitous ARPs on ens33 for 192.168.183.177
11月 17 15:16:06 node1 Keepalived_vrrp[10783]: Sending gratuitous ARP on ens33 for 192.168.183.177
11月 17 15:16:06 node1 Keepalived_vrrp[10783]: Sending gratuitous ARP on ens33 for 192.168.183.177
11月 17 15:16:06 node1 Keepalived_vrrp[10783]: Sending gratuitous ARP on ens33 for 192.168.183.177
11月 17 15:16:06 node1 Keepalived_vrrp[10783]: Sending gratuitous ARP on ens33 for 192.168.183.177

九、查看node1与node2的IP

发现VIP又回到了node1

keepalived默认为抢占模式，当node1的keepalived恢复时，VIP又会被抢回node1

只有加了vrrp实例中加了nopreempt这一条，VIP才不会抢回去

[root@node1 keepalived]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    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 forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:0c:29:7d:cb:f8 brd ff:ff:ff:ff:ff:ff
    inet 192.168.183.175/24 brd 192.168.183.255 scope global noprefixroute ens33
       valid_lft forever preferred_lft forever
    inet 192.168.183.177/32 scope global ens33
       valid_lft forever preferred_lft forever
    inet6 fe80::20c:29ff:fe7d:cbf8/64 scope link 
       valid_lft forever preferred_lft forever
[root@node1 keepalived]# ssh node2 'ip a'
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    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 forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:0c:29:fb:3b:50 brd ff:ff:ff:ff:ff:ff
    inet 192.168.183.176/24 brd 192.168.183.255 scope global noprefixroute ens33
       valid_lft forever preferred_lft forever
    inet6 fe80::20c:29ff:fefb:3b50/64 scope link 
       valid_lft forever preferred_lft forever

猜你喜欢

转载自blog.csdn.net/qq_33317586/article/details/84178293
今日推荐
TIOBE 5 月榜单：Fortran “复活”进入 Top 10
GCC 14.1 发布
面壁智能发布 Eurux-8x22B 开源大模型 —— 堪称「理科状元」
开源日报 | 谷歌扶持鸿蒙上位；开源Rabbit R1；Docker加持的安卓手机；微软的焦虑和野心；海尔电器把开放平台关了
中国码农的“35岁魔咒”
蘭雅 CorelDRAW 插件 2024.5.1 国际劳动节版，免费下载
Arc Browser for Windows 1.0 正式 GA
90后程序员开发视频搬运软件、不到一年获利超 700 万，结局很刑！
周排行
基本数据类型封装类比较 Java源码解读(一) 8种基本类型对应的封装类型
JS实现无缝滚动上
深入解析HashMap原理（基于JDK1.8）
mysql的连接池
关于.htc
linux下的ubuntu12.04图形界面
【数论】好推不好记的扩展欧几里德
设备树详解
cscope + tags 简单设置
xml学习
每日归档
更多
2024-05-09(35)
2024-05-08(42)
2024-05-07(14)
2024-05-06(40)
2024-05-05(0)
2024-05-04(7)
2024-05-03(19)
2024-05-02(0)
2024-05-01(4)
2024-04-30(1)

代码天地 © 2018 codetd.com

境外服务器   最新电视剧2022