Archive for the ‘NFS’ Category

Data Centre in a Rack

June 9, 2012

I recently took the plunge to install some of my more used networking components into a server rack.
I’d been putting this off for a few years.
Most of these components have been projects of mine which I’ve already blogged on in various places on this blog.
The obvious places are the following

There are also many other topics I’ve blogged on that form part of the work gone into these components and set-up of.
Check them out.

There’s also a home made router in an old $30 desktop pc run from a CF card.

Small Data Centre

Home Rack Server

HPR Pod cast on a bunch of good tools useful for setting up and maintaining an Open Source Data Centre.
ep0366 :: The Open Source Data Center

Questions welcome.
I’m happy to provide directions and insights from my experience.

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Setting up a NFS share in FreeNAS

May 16, 2010

This setup is quite different to how you would normally setup NFS on a *nix server.
I only use NFS in read only mode due to security concerns with NFS.
There are very few options you can configure and there is no point in modifying the /etc/rc.conf /etc/exports and there is no point in adding /etc/hosts.deny, /etc/hosts.allow

as they will be removed on server reboot. Hopefully these options will be added in the future or at least a work around made available.
Ideally I’d like to add the

-mapall=myuser:myusergroup

option to the /etc/exports but there is no point as it’s not persisted to hard disk.

In the Web UI under Services|NFS leave Number of servers as default of 4 and check the enable box. This options will allow 4 concurrent users to be logged into the share.

In the Web UI under Services|NFS|Shares add a share with Path of /mnt/FileServer/myNFSshare Network 192.168.0.0/24

Have to set Map all users to root to Yes. This is the same as including the no_root_squash option that can be put in the /etc/exports on a *nix box, but normally I’d choose root_squash, but this doesn’t work well for mounting at boot without the

-mapall=myuser:myusergroup

option in the /etc/exports
Setup my authorised network, All dirs and Read only to yes.

Added the following lines to /etc/rc.conf in FreeNAS as per this link

rpcbind_enable="YES"
nfs_server_enable="YES"
mountd_flags="-r"

Didn’t need the below line adding to the client machines /etc/rc.conf, although this said I did.

nfs_client_enable="YES"

After I restarted the server, the

mountd_flags="-r"

line was removed and the /mnt/.ssh dir was removed.
I no longer had key pair auth for SSH.
So had to go through the process of setting up that again.
The problem was any changes to /etc are not persisted to disk, so after a reboot it’s reset as it’s the FreeNAS ROM.
Matt Rude helped out with this

What I did was copy the /etc/rc.conf to my ~ which is /mnt/FileServer/home/myuser
Add the options again in /mnt/FileServer/home/myuser/rc.conf
Only the last option was actually not present and needed to be added.
Create a link from /etc/rc.conf to /mnt/FileServer/home/myuser/rc.conf

ln -s /mnt/FileServer/home/myuser/rc.conf /etc/rc.conf

Renamed the /etc/exports on the file server
Check the exports man page for the options…
Created an exports in /mnt/FileServer/home/myuser/ and added the following lines:

/mnt/FileServer/media -alldirs,ro -mapall=myuser:family -network 192.168.0.0 -mask 255.255.255.0
/mnt/FileServer/media -alldirs,ro -mapall=otheruser:family -network 192.168.0.0 -mask 255.255.255.0

Link the /etc/exports to /mnt/FileServer/home/myuser/exports

ln -s /mnt/FileServer/home/myuser/exports /etc/exports

None of the above links worked as they are removed on server reboot.
So basically the only options you have are on the Services|NFS web UI.

From here I created the /mnt/myfileserver/media directory on my client machines and set the myfileserver and media dir and perms to
/mnt/myfileserver was drwxrw—- myuser myusergroup
/mnt/myfileserver/media was drwxr-x— myuser users

Tried to mount the exported nfs share:

# mount myfreenasservername:/mnt/FileServer/media /mnt/myfileserver/media

This worked. So unmounted it.

# umount /mnt/myfileserver/media

Updated the /etc/fstab on the client machines so myfreenasservername:/mnt/FileServer/media would be mounted to /mnt/myfileserver/media on the client machines at boot.
add this to your client machines /etc/fstab

myfileservername:/mnt/FileServer/media /mnt/myfileserver/media nfs ro,hard,intr 0 0