NFS

NFS

Last update: 2006/8/7
Since: 1994/2/22
Here -- Installation & Setup -- Linux

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Contents
1. Display the info. (2006/8/7)
   
2. Client Linux (added 2002/9/12)
   
3. Automount client Linux (added 2002/7/9)
   
4. Server (Linux) (added 2002/9/17)
   
5. Sun4
   (Automount client, Clients, Server, Synchronization)
   

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Display info.

Status

% mount
% showmount -e hostname ...... What are exported by hostname.

Statistics

% nfsstat -s
% nfsstat -c


Client (RH7.1)

1. Access control
   Check /etc/sysconfig/ipchains, and add the following if needed.
   
   -A input -s 130.87.xxx.xxx -d 0/0 -p udp -j ACCEPT
   !! Don't forget to restart ipchains after you changed the parameter.
   
   # service ipchains restart
2. Starting daemons
   To start automatically at boot time.
   
   # chkconfig portmap on
   # chkconfig nfslock on
   # chkconfig autofs on
   
   Staring manually.
   
   # service portmap start
   # service nfslock start
   # service autofs start
   

Automount client (RH7.2, Turbo7)

1. Create a mount directory.
   
   # mkdir /misc
2. Add the following entry into /etc/auto.master.
   /misc /etc/auto.misc
3. A sample of /etc/auto.misc file.
   Q_and_A -ro,intr fs.kek.jp:/public/linux/Support/Q_and_A
   Tips -ro,intr fs.kek.jp:/public/linux/Support/Tips
4. Access control
   
   Refer to "2. Client".
5. Starting daemons
   
   Refer to "2. Client".
6. Confirmation
   
   $ ls /misc/Q_and_A /misc/Tips
   
   

Server (Linux)

1. Starting NFS server.
   With Turbo workstation 8 on 2002/9/12.
   
   • Access control
     Allow portmap access in /etc/hosts.allow. A sample is,
     
     portmap: soleil.kek.jp 130.87.32.99
     After chaning /etc/hosts.allow, portmap and nfs(mountd) need to be restarted.
     
     
   • # /etc/rc.d/init.d/portmap start
     
     
   • # /etc/rc.d/init.d/nfs start
     Following daemons will be started.
     
     Starting NFS services:
     Starting NFS quotas: OK
     Starting NFS mountd: OK
     Starting NFS daemon: OK
     
     If portmap is not started....
     

     -->

     # /usr/sbin/rpc.rquotad
     Cannot register service: RPC: Unable to receive; errno = Connection refused
     rpc.rquotad: unable to register (RQUOTAPROG, RQUOTAVERS, udp).
     

     -->

     /usr/sbin/rpc.mountd
     Cannot register service: RPC: Unable to receive; errno = Connection refused
     

   
   
2. A sample of /etc/exports.
   
   /Lib soleil.kek.jp(rw)
   /home lune.kek.jp(rw) soleil.kek.jp(rw)
   
3. Other operations.
   
   • After changing /etc/exports
     # /etc/rc.d/init.d/nfs reload
     
     or
     # exportfs -a
   
   
4. Display status.
   
   #/usr/sbin/exportfs
   #/usr/sbin/showmount -a
   

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Sun4

Automount client

• Insert following line in "/etc/rc.local" to start automount daemon
  
  /usr/etc/automount -m -f /etc/auto.master
  
  
• Automount description

  /etc/auto.master # mount point map file option /- /etc/auto.direct soft /home /etc/auto.indirect /etc/auto.direct # keyoption location /fs -ro fs:/public/linux /etc/auto.indirect # keyoption location cc -rw,soft procyon:/home/cc 

  * Mount point must be created previously.

Clients (Sun4)

• Start-up
  biod daemons are started from /etc/rc.local
  
  
• NFS mount automatically at system boot time
  Entries in "/etc/fstab".
  

  example) /dev/sd3a / 2 rw,nosuid 1 1 /dev/sd3d /usr 2 rw 1 2 /dev/sd3e /home 2 rw 1 3 fs:/public/sun /mnt/fs nfs ro,soft,retry=1 0 0 

  (4th line is NFS mount; mounts "/public/sun" of fs onto "/mnt/fs" with read only mode.)
  
  
• Manual mounting
  # mount -o option hostname:remote-filesystem local-directory
  For example....
  # mount -o soft fs.kek.jp:/public/sun /mnt/fs
  unmount
  # umount /mnt/fs
  
  
• Mounting all files of a file type.
  When you changed NFS mount entry in /etc/fstab, enter the following command to activate new discription.
  # umount -a -t nfs
  # mount -a -t nfs
  

Server (Sun4)

• System files
  System program ... exportfs
  Daemons ...... rpc.mounted & nfsd
  
  
• Start-up
  /etc/rc.local
  Calls exportfs ------ Reads /etc/exports, Creates /etc/xtab
  Calls nfsd
  Calls rpc.mountd ---- Reads /etc/xtab
  
  
  
• The directories to be shared are listed in "/etc/exports".

  example) /home -access=host1:host2 ..... Permit to host1 & host2. /usr/local -ro,access=host3 ..... Permit to host3 with read only mode. /share -root=host1 ..... Permit to any hosts, Petmit to SU of host1. 

• Manual operation
  When you modified /etc/exports, the following procedure will make new list valid.
  
  # exportfs -a
  Confirmation
  % exportfs

Synchronization (Sun4)

Time synchronization will be required.
# rdate hostname


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