Changes
→warnings
There are two ways to setup NFS server on common [[HN]]:
use a user-space NFS server daemon or use an in-kernel implementation
of NFS server. Some peculiarities appear if you intend to run NFS serverin [[container]].
{{Note|for information about NFS client inside container, see [[NFS]].}}
Kernel-space NFS server is supported by latest RHEL5 and RHEL6 based kernels and since vzctl-3.0.24.
NB! Currently only NFSv3 is supported - no NFSv4 support yet.
=== Prerequisites ===
In order to run an NFS server inside a container, make sure:
* '''nfsd kernel module is loaded on host system before starting a container'''* '''nfsd feature for a container is turned on ''' (<code>vzctl set $CTID --feature nfsd:on --save</code>) === Setup ===* Make sure that rpcbind service is started before nfs service:: <code>chkconfig rpcbind on && service rpcbind start</code>* Disable NFSv4 and nfsd module loading warnings in /etc/sysconfig/nfs by uncommenting the following lines: MOUNTD_NFS_V3="yes" RPCNFSDARGS="-N 4" NFSD_MODULE="noload"* Start NFS service:: <code>chkconfig nfs on && service nfs start</code> === Troubleshooting === Make sure that:# you have enabled nfsd feature for your container# nfsd kernel module is loaded before you started the container ==== rpcbind ==== If you see this:<pre># service nfs start...Starting NFS services: [ OK ]Starting NFS quotas: Cannot register service: RPC: Unable to receive; errno = Connection refusedrpc.rquotad: unable to register (RQUOTAPROG, RQUOTAVERS, udp).</pre> It means you haven't started rpcbind service. Solution:<pre>chkconfig rpcbind on && service rpcbind start</pre> ==== nfsd module ====If you see this:<pre># service nfs start....Starting NFS daemon: rpc.nfsd: Unable to access /proc/fs/nfsd errno 2 (No such file or directory).Please try, as root, 'mount -t nfsd nfsd /proc/fs/nfsd' and then restart rpc.nfsd to correct the problem [FAILED]# mount -t nfsd nfsd /proc/fs/nfsdmount: unknown filesystem type 'nfsd'</pre> It means you haven't loaded nfsd kernel module on host before starting container. ==== warnings ==== If you see this:<pre># /etc/init.d/nfs startFATAL: Module nfsd not found.FATAL: Error running install command for nfsd...</pre> It is actually harmless, you don't need to do anything. In case you want this to go away, uncomment (or add) the line NFSD_MODULE="noload" in <code>/etc/sysconfig/nfs</code> file.
== User-space NFS server ==
The current stable debian version 5.0 (lenny) provides two packages for user space nfs support: <code>nfs-user-server</code> and <code>unfs3</code>. Here i describe my experiences with them --[[User:Strimo|Strimo]] 17:47, 16 February 2009 (UTC)
It seems that also the unfs3 package has been removed from the debian repositories. --[[Special:Contributions/95.21.175.189|95.21.175.189]] 23:39, 30 July 2011 (UTC)
==== nfs-user-server ====
Works fine until now. Note that both unfs3 and nfs-user-server do not support file locking!
NOTE: I tested on centos 5.6 using unfs3 and I had to run the /etc/init.d/nfs service and see it work before I could use unfs. also use exports -a before using sudo /usr/sbin/unfsd -T -e /etc/exports
=== On CentOS 5 ===