解决NFS单点故障

版权声明：from 瑾川（fakehydra.xyz） https://blog.csdn.net/fake_hydra/article/details/82970631

yum install -y keepalived

nfs01 上的配置文件

[root@nfs01 ~]# cat /etc/keepalived/keepalived.conf
! Configuration File for keepalived

 global_defs {
    router_id nfs01
 }
 
 vrrp_script check_data {
    script "/server/scripts/data.sh"
    interval 2 
    weight 60
 }
 
 vrrp_instance oldboy {
     state MASTER
     interface eth1
     virtual_router_id 51
     priority 90
     advert_int 1
     authentication {
         auth_type PASS
         auth_pass 1111
     }
     virtual_ipaddress {
         172.16.1.3/16 dev eth1 label eth1:1
     }
     track_script {
     check_data
     }
 }
 [root@nfs01 ~]# cat /server/scripts/data.sh 
 #!/bin/bash
 #    File Name: data.sh
 #    Author: su-lemon
 #    Blog: https://lemonsu9.github.io/
 #    Mail: [email protected] 
 #    Created Time:Wed 19 Sep 2018 11:53:29 PM CST
 #    Description: This is a test script
 
 nfs_info=$(ps -ef|grep -c nfs)
 
 if [ $nfs_info -ge 4 ]    
     then
        echo "nfs is start~"     
        exit 0
     else
        echo "nfs is stop~"     
       exit 1
     fi
 
 echo 'net.ipv4.ip_nonlocal_bind = 1' >>/etc/sysctl.conf
 sysctl -p
 
 /etc/init.d/keepalived start

rsync 上的配置文件

  [root@backup ~]# cat /etc/keepalived/keepalived.conf 
  ! Configuration File for keepalived
      
      global_defs {
         router_id backup
      }
      
      vrrp_instance oldboy {
          state BACKUP
          interface eth1
          virtual_router_id 51
          priority 100
          advert_int 1
          authentication {
              auth_type PASS
              auth_pass 1111
          }
          virtual_ipaddress {
              172.16.1.3/16 dev eth1 label eth1:1
          }
      }

在backup 的/etc/rsyncd.conf 配置文件中添加一个data模块,并将uid gid 改为www

 [root@backup ~]# cat /etc/rsyncd.conf 
 uid = www
 gid = www
 use chroot = no
 max connections = 20
 timeout = 300
 pid file = /var/run/rsyncd.pid
 lock file = /var/run/rsync.lock
 log file = /var/log/rsyncd.log
 ignore errors
 read only = false
 list = false
 hosts allow = 172.16.1.0/24
 hosts deny = 0.0.0.0/32
 auth users = rsync_backup
 secrets file = /etc/rsync.password
 [backup]
 comment = "backup dir by oldboy"
 path = /backup
 [data]
 path = /data	

nfs 服务的配置文件

nfs01 和 backup 一样

 [root@nfs01 ~]# cat /etc/exports 
 #share /data by su-lemon for share at 20180918
 /data/www  172.16.1.0/24(rw,sync,no_all_squash,root_squash,anonuid=666,anongid=666)
 /data/blog  172.16.1.0/24(rw,sync,no_all_squash,root_squash,anonuid=666,anongid=666)
 /data/bbs  172.16.1.0/24(rw,sync,no_all_squash,root_squash,anonuid=666,anongid=666)


 [root@backup ~]# ll /data
 total 12
 drwxrwxrwx 2 www www 4096 Sep 20 00:17 bbs
 drwxrwxrwx 2 www www 4096 Sep 20 00:17 blog
 drwxrwxrwx 2 www www 4096 Sep 20 00:17 www
 
 
 [root@nfs01 ~]# ll /data
 total 12
 drwxrwxrwx 2 www www 4096 Sep 19 13:18 bbs
 drwxrwxrwx 2 www www 4096 Sep 19 13:18 blog
 drwxrwxrwx 2 www www 4096 Sep 19 13:18 www
 	
 data目录权限777 所属组和主 为www	

将服务设为开机自启

 chkconfig nfs on
 chkconfig keepalived on

对web服务器上的网站上传目录进行挂载

 [root@web01 ~]# ll /tmp
 total 964
 -rw-r--r--   1 root root 962858 Sep 18 11:22 bak.sql
 drwxr-xr-x  21 root root   4096 Sep 20 08:38 DedeCMS_bak
 drwxr-xr-x  11 root root   4096 Sep 20 08:44 Discuz_bak
 drwxr-xr-x   3 root root   4096 Sep 18 10:20 pear
 drwxr-xr-x   3 root root   4096 Sep 20 08:39 wordpress_bak
 drwxrwxrwx   3 www  www    4096 Sep 19 11:44 www
 -rw-------.  1 root root      0 Sep 17 20:44 yum.log

将数据迁移出来(web 01,02,03 一样)

 [root@web01 ~]# mv /application/nginx/html/www/uploads/* /tmp/DedeCMS_bak/
 [root@web01 ~]# mv /application/nginx/html/blog/wp-content/uploads/* /tmp/wordpress_bak/
 [root@web01 ~]# mv /application/nginx/html/bbs/upload/data/attachment/* /tmp/Discuz_bak/

挂载(web 01,02,03 一样)

 [root@web01 ~]# mount -t nfs 172.16.1.3:/data/www /application/nginx/html/www/uploads/data/
 [root@web01 ~]# mount -t nfs 172.16.1.3:/data/bbs /application/nginx/html/bbs/upload/data/attachment/
 [root@web01 ~]# mount -t nfs 172.16.1.3:/data/blog /application/nginx/html/blog/wp-content/uploads/
 [root@web01 ~]# df -h
 Filesystem            Size  Used Avail Use% Mounted on
 /dev/sda3              48G  3.8G   42G   9% /
 tmpfs                 190M     0  190M   0% /dev/shm
 /dev/sda1             190M   35M  146M  19% /boot
 172.16.1.3:/data/www   48G  1.5G   44G   4% /application/nginx-1.14/html/www/uploads/data
 172.16.1.3:/data/bbs   48G  1.5G   44G   4% /application/nginx-1.14/html/bbs/upload/data/attachment
 172.16.1.3:/data/blog
                       48G  1.5G   44G   4% /application/nginx-1.14/html/blog/wp-content/uploads

将数据移回去(web01),但是只需要将web01 上的数据移动回去,web02 web03 不需要将数据移动回去

 [root@web01 wordpress_bak]# cp -r /tmp/wordpress_bak/* /application/nginx/html/blog/wp-content/uploads/
 [root@web01 wordpress_bak]# cp -r /tmp/Discuz_bak/* /application/nginx/html/bbs/upload/data/attachment/
 [root@web01 wordpress_bak]# cp -r /tmp/DedeCMS_bak/* /application/nginx/html/www/uploads/data/