通过 NFSv4 挂载的错误用户/组:无人用户?

通过 NFSv4 挂载的错误用户/组:无人用户?

我们有3台服务器:

  • NFS 服务器:1.2.3.4 (rhel 6.8)
  • 一个不错的NFS客户端:SERVER5G(rhel6.8)
  • 错误的 NFS 客户端:SERVER6B (rhel6.3)

SERVER6B(不良 nfs 客户端)的问题在于,它将相同 NFS 挂载的用户/组显示为“nobody”。

NFSv4、RHEL 6 计算机。

[root@SERVER5G ~]# ls -la /var/FOODump/
total 55205372
drwxrwxr-x  18 foouser     root            4096 Jul 11 17:40 .
drwxr-xr-x. 31 root     root            4096 Mar 18 12:51 ..
-rw-------   1 foouser     foouser         1117958 Mar 23 10:41 bar.7z
[root@SERVER5G ~]# 
[root@SERVER5G ~]# stat /var/FOODump/bar.7z
  File: `/var/FOODump/bar.7z'
  Size: 1117958     Blocks: 2192       IO Block: 1048576 regular file
Device: 16h/22d Inode: 16          Links: 1
Access: (0600/-rw-------)  Uid: ( 2826/    foouser)   Gid: ( 2826/    foouser)
Access: 2016-03-23 10:41:48.000000000 +0000
Modify: 2016-03-23 10:41:31.000000000 +0000
Change: 2016-03-23 10:41:31.000000000 +0000
[root@SERVER5G ~]# 
[root@SERVER5G ~]# id nobody
uid=99(nobody) gid=99(nobody) groups=99(nobody)
[root@SERVER5G ~]# 
[root@SERVER5G ~]# id foouser
uid=2826(foouser) gid=2826(foouser) groups=2826(foouser)
[root@SERVER5G ~]# 
[root@SERVER5G ~]# df -mP /var/FOODump/
Filesystem                 1048576-blocks   Used Available Capacity Mounted on
1.2.3.4:/var/FOODump         193524 129698     53996      71% /var/FOODump
[root@SERVER5G ~]# 
[root@SERVER5G ~]# mount | grep FOODump
1.2.3.4:/var/FOODump on /var/FOODump type nfs (rw,vers=4,addr=1.2.3.4,clientaddr=1.2.3.5)
[root@SERVER5G ~]# 

和坏客户:

[root@SERVER6B ~]# ls -la /var/FOODump/
total 55205372
drwxrwxr-x  18 nobody nobody        4096 Jul 11 17:40 .
drwxr-xr-x. 31 root   root          4096 Jul  6 06:40 ..
-rw-------   1 nobody nobody     1117958 Mar 23 10:41 bar.7z
[root@SERVER6B ~]# 
[root@SERVER6B ~]# stat /var/FOODump/bar.7z
  File: `/var/FOODump/bar.7z'
  Size: 1117958     Blocks: 2192       IO Block: 1048576 regular file
Device: 18h/24d Inode: 16          Links: 1
Access: (0600/-rw-------)  Uid: (   99/  nobody)   Gid: (   99/  nobody)
Access: 2016-03-23 10:41:48.000000000 +0000
Modify: 2016-03-23 10:41:31.000000000 +0000
Change: 2016-03-23 10:41:31.000000000 +0000
[root@SERVER6B ~]# 
[root@SERVER6B ~]# id nobody
uid=99(nobody) gid=99(nobody) groups=99(nobody)
[root@SERVER6B ~]# 
[root@SERVER6B ~]# id foouser
uid=2826(foouser) gid=2826(foouser) groups=2826(foouser)
[root@SERVER6B ~]# 
[root@SERVER6B ~]# df -mP /var/FOODump/
Filesystem                 1048576-blocks   Used Available Capacity Mounted on
1.2.3.4:/var/FOODump         193524 129698     53996      71% /var/FOODump
[root@SERVER6B ~]# 
[root@SERVER6B ~]# mount | grep FOODump
1.2.3.4:/var/FOODump on /var/FOODump type nfs (rw,vers=4,addr=1.2.3.4,clientaddr=1.2.3.6)
[root@SERVER6B ~]# 

我们已经尝试卸载、rmmod 所有 NFS 内核模块,在 SERVER6B 上挂载 /var/FOODump,但没有帮助。

如果我们在 SERVER6B 上“su - foouser”,我们可以“触摸测试文件”:

  • 在 SERVER6B 上显示为无人。
  • 在 SERVER5G 上显示为 foouser

问题:为什么 SERVER6B 通过 NFS 显示“nobody”用户?

答案1

[root@SERVER6B ~]# umount /var/FOODump
[root@SERVER6B ~]# nfsidmap -c
[root@SERVER6B ~]# mount /var/FOODump

解决了问题..

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