NFS

2007-06-11T12:56:50Z

Kseremet: /* Prerequisites */

This page describes how to mount NFS partition inside VE.

== NFS server ==
Currently OpenVZ kernel doesn't include kernel NFS server support. Howether you are still able to use user space [[NFS server inside VE]].

== NFS client ==
=== Preparations ===
==== Prerequisites ====
You will need the following software:

# [http://openvz.org/download/utils#vzctl vzctl] version 3.0.13 or higher
# [http://openvz.org/download/kernel/ kernel] version 2.6.18-028test006 or higher (2.6.18-028stab* will do), or any recent RHEL5-based or 2.6.20-based kernel.

Note: In REL4 2.6.9-023stab044.4-smp kernel NFS support can be given to a VE by setting:
sunrpc.ve_allow_rpc = 1
fs.nfs.ve_allow_nfs = 1
kernel.ve_allow_kthreads = 1

==== Prepare the HN ====

For NFS mounts to work in the VEs with the RHEL5-based kernels you must enable kernel threads in the VE by setting "kernel.ve_allow_kthreads=1" in /etc/sysctl.conf

<pre>
# modprobe nfs
</pre>

==== Prepare the VE ====
To allow a VE use NFS filesystem, you will need to start it with "nfs" feature enabled. If the VE is running while you set the --features "nfs:on", you will need to reboot it.
<pre>
# vzctl set 101 --features "nfs:on" --save
# vzctl start 101
</pre>

After this you may see nfs in <code>/proc/filesystems</code>
<pre>
# vzctl exec 101 cat /proc/filesystems
ext3
ext2
nodev rpc_pipefs
nodev proc
nodev nfs
nodev sysfs
nodev tmpfs
nodev devpts
</pre>

=== Mounting NFS ===
Assuming that you already have NFS server set up at <code>192.168.0.1:/nfs_pub</code> mounting will be simple
<pre>
# vzctl enter 100
# mkdir /nfs
# mount -t nfs 192.168.0.1:/nfs_pub /nfs
# cat /proc/mounts
simfs / simfs rw 0 0
proc /proc proc rw 0 0
sysfs /sys sysfs rw 0 0
devpts /dev/pts devpts rw 0 0
nfs /nfs nfs rw,vers=3,rsize=32768,wsize=32768,hard,proto=tcp,timeo=600,retrans=2,sec=sys,addr=192.168.0.1 0 0
</pre>

For more details on how to setup NFS mount see [http://nfs.sourceforge.net/nfs-howto/ar01s04.htm NFS-client HOWTO]

[[Category: HOWTO]]

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NFS