立即登录 马上注册
首页 › 开发帮助文档 › 服务系统 › keepalived主备配置的方法

赞

评论

收藏

[Linux] keepalived主备配置的方法

服务系统 服务系统 发布于：2021-06-30 17:34 | 阅读数：518 | 评论：0

　　记录一些自己的心得以及方法，本着共同学习，互相进步为目的。本次总结了keepalived主备简单的配置，欢迎大家评论留言（以下是keepalived主备简单配置的方法，均在试验机上操作，并且在实际工程环境中有验证过，目前配置过的OS有centos7.7）。
一、环境介绍：　　1、系统环境：
root@test1:/root>cat /etc/redhat-release 
CentOS Linux release 7.7.1908 (Core)
root@test1:/root>
　　2、主机环境：
　　MASTER:
root@test1:/root>hostname -I
192.168.100.10 
root@test1:/root>
　　BACKUP:
root@test2:/root>hostname -I
192.168.100.20 
root@test2:/root
二、配置keepalived操作：　　1、分别登录192.168.100.10、192.168.100.20，确定主机上安装了keepalived：
root@test1:/root>rpm -qa|grep keepalived
keepalived-1.3.5-16.el7.x86_64
root@test1:/root>
　　2、若没有安装keepalived，则进行一下操作：
root@test1:/root>rpm -e keepalived-1.3.5-16.el7.x86_64
root@test1:/root>rpm -qa|grep keepalived
root@test1:/root>
root@test1:/root>cd /tmp
root@test1:/tmp>rz -e
rz waiting to receive.
Starting zmodem transfer.  Press Ctrl+C to cancel.
Transferring keepalived-1.2.13-6.el7.x86_64.rpm...
  100%   223 KB   223 KB/sec  00:00:01     0 Errors  
root@test1:/tmp>ls -ltr
total 224
-rw-r--r-- 1 root root 228672 Jun 23 10:53 keepalived-1.2.13-6.el7.x86_64.rpm
root@test1:/tmp>
root@test1:/tmp>
root@test1:/tmp>
root@test1:/tmp>rpm -ivh keepalived-1.2.13-6.el7.x86_64.rpm 
warning: keepalived-1.2.13-6.el7.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID f4a80eb5: NOKEY
Preparing...              ################################# [100%]
Updating / installing...
   1:keepalived-1.2.13-6.el7      ################################# [100%]
root@test1:/tmp>
　　3、配置keepalived：
　　MATER：
root@test1:/etc/keepalived>ls -ltr
total 8
-rw-r--r-- 1 root root 3562 Jun 23 10:54 keepalived.conf.bak
-rw-r--r-- 1 root root 3516 Jun 23 10:55 keepalived.conf
root@test1:/etc/keepalived>vi keepalived.conf
......
vrrp_instance VI_1 {
  state MASTER      //主用则为master，备用为backup
  interface ens37     //根据实际情况修改为对应的网口
  virtual_router_id 51
  priority 100
  advert_int 1
  authentication {
    auth_type PASS
    auth_pass 1111
  }
  virtual_ipaddress {
    192.168.100.9     //根据实际情况修改为浮动IP
  }
......
　　BACKUP：
root@test2:/tmp>cd /etc/keepalived/
root@test2:/etc/keepalived>cp keepalived.conf keepalived.conf.bak
root@test1:/etc/keepalived>ls -ltr
total 8
-rw-r--r-- 1 root root 3562 Mar  6  2015 keepalived.conf
-rw-r--r-- 1 root root 3562 Jun 23 10:59 keepalived.conf.bak
root@test2:/etc/keepalived>vi keepalived.conf
vrrp_instance VI_1 {
  state BACKUP           //主用则为master，备用为backup
  interface ens33        //根据实际情况修改为对应的网口
  virtual_router_id 51
  priority 50          //优先级修改为50，比主用的优先级小就行
  advert_int 1
  authentication {
    auth_type PASS
    auth_pass 1111
  }
  virtual_ipaddress {
    192.168.100.9       //根据实际情况修改为浮动IP
  }
　　4、启动服务：
　　MASTER：
root@test1:/etc/keepalived>service keepalived start
Redirecting to /bin/systemctl start keepalived.service
root@test1:/etc/keepalived>ps -ef | grep keepalived
root     2752    1  0 16:35 ?    00:00:00 /usr/sbin/keepalived -D
root     2753   2752  0 16:35 ?    00:00:00 /usr/sbin/keepalived -D
root     2754   2752  0 16:35 ?    00:00:00 /usr/sbin/keepalived -D
root     2920   2435  0 16:52 pts/0  00:00:00 grep --color=auto keepalived
root@test1:/etc/keepalived>
　　BACKUP：
root@test2:/etc/keepalived>service keepalived start
Redirecting to /bin/systemctl start keepalived.service
root@test1:/etc/keepalived>ps -ef|grep keepalived
root     2104    1  0 11:06 ?    00:00:00 /usr/sbin/keepalived -D
root     2105   2104  0 11:06 ?    00:00:00 /usr/sbin/keepalived -D
root     2106   2104  0 11:06 ?    00:00:00 /usr/sbin/keepalived -D
root     2108   1798  0 11:06 pts/0  00:00:00 grep --color=auto keepalived
root@test1:/etc/keepalived>
　　5、加入开机自启动（两台都操作）：
root@test2:/etc/keepalived>systemctl list-unit-files |grep keepalived
keepalived.service              disabled
root@test2:/etc/keepalived>chkconfig   keepalived   on
Note: Forwarding request to 'systemctl enable keepalived.service'.
Created symlink from /etc/systemd/system/multi-user.target.wants/keepalived.service to /usr/lib/systemd/system/keepalived.service.
root@test2:/etc/keepalived>systemctl list-unit-files |grep keepalived
keepalived.service              enabled 
root@test2:/etc/keepalived>
　　6、检查主keepalived是否有浮动IP：
　　在主用上有浮动IP即为配置正常，现象如下：
root@test1:/etc/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:d1:5f:bc brd ff:ff:ff:ff:ff:ff
3: ens37: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
  link/ether 00:0c:29:d1:5f:c6 brd ff:ff:ff:ff:ff:ff
  inet 192.168.100.10/24 brd 192.168.100.255 scope global ens37
     valid_lft forever preferred_lft forever
  inet 192.168.100.9/32 scope global ens37        //MASTER上有浮动IP即为正常
     valid_lft forever preferred_lft forever
  inet6 fe80::20c:29ff:fed1:5fc6/64 scope link 
     valid_lft forever preferred_lft forever
root@test1:/etc/keepalived>
三、测试：　　1、宕机主用keepalived，浮动切到备用上，现象如下：
root@test1:/etc/keepalived>service keepalived stop
Redirecting to /bin/systemctl stop keepalived.service
root@test1:/etc/keepalived>ps -ef|grep keepalived
root     2177   1798  0 11:08 pts/0  00:00:00 grep --color=auto keepalived
root@test1:/etc/keepalived>
root@test2:/etc/keepalived>ip a
......
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
  link/ether 00:0c:29:d1:5f:bc brd ff:ff:ff:ff:ff:ff
  inet 192.168.100.20/24 brd 192.168.100.255 scope global noprefixroute ens33
     valid_lft forever preferred_lft forever
  inet 192.168.100.9/32 scope global ens33
     valid_lft forever preferred_lft forever
  inet6 fe80::8c23:eb29:ae15:f2d6/64 scope link noprefixroute 
     valid_lft forever preferred_lft forever
root@test2:/etc/keepalived>
　　由以上可以看出，浮动192.168.100.9已经切到backup上。
　　2、接着把master上的keepalive起来：
root@test1:/etc/keepalived>service keepalived start
Redirecting to /bin/systemctl start keepalived.service
root@test1:/etc/keepalived>ps -ef|grep keepalived
root     2200    1  0 11:10 ?    00:00:00 /usr/sbin/keepalived -D
root     2201   2200  0 11:10 ?    00:00:00 /usr/sbin/keepalived -D
root     2202   2200  0 11:10 ?    00:00:00 /usr/sbin/keepalived -D
root     2204   1798  0 11:11 pts/0  00:00:00 grep --color=auto keepalived
root@test1:/etc/keepalived>ip a
......
3: ens37: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
  link/ether 00:0c:29:d1:5f:c6 brd ff:ff:ff:ff:ff:ff
  inet 192.168.100.10/24 brd 192.168.100.255 scope global ens37
     valid_lft forever preferred_lft forever
  inet 192.168.100.9/32 scope global ens37
     valid_lft forever preferred_lft forever
  inet6 fe80::20c:29ff:fed1:5fc6/64 scope link 
     valid_lft forever preferred_lft forever
root@test1:/etc/keepalived>
把master上的keepalived起来后，浮动切回master上，因为priority优先级高。
关注下面的标签，发现更多相似文章
免责声明：

1. 本站所有资源来自网络搜集或用户上传，仅作为参考不担保其准确性！

2. 本站内容仅供学习和交流使用，版权归原作者所有！© 查看更多

3. 如有内容侵害到您，请联系我们尽快删除，邮箱：kf@codeae.com

分享到： QQ好友和群QQ好友和群 QQ空间QQ空间

举报

返回列表
相关帖子
avatar
276 经验
1107 文档
OPNE在线字典
  • 手机版| 免责声明|
2021-2024  版权所有：CodeAE代码之家   
粤ICP备2023096576号-2