Ubuntu 14.04 and LXC containers

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Ubuntu releases after 10.04 LTS do no longer provide unfs3. Unfs3 is useful when one want to setup a fog server in a container with OpenVZ or LXC. Nfs kernel server cannot run under these containers.

You have to download, compile and install unfs3 from sources.

  • Download unfs3
  • decompress the archive : tar zxf unfs3-0.9.22.tar.gz
  • apt-get install build-essential make flex bison
  • cd unfs3-0.9.22
  • ./configure
  • make
  • make install
  • make install-init
  • edit /etc/init.d/unfsd and replace the occurence of /usr/sbin/unfsd with /usr/local/sbin/unfsd
  • /etc/init.d/unfsd start
  • check unfsd is running : ps -ef | grep unfsd
  • if it runs, then run update-rc.d unfsd defaults

Install and configure fog as usual.

If you want to setup a separate volume for your images :

  • assuming you want to use a logical volume (LVM) /dev/vg0/lv with a ext3 filesystem :
  • run your container and move all files located in /images into an other location (/root/images-bak), including the hidden file /images/.mntcheck
  • from the lxc host, open /var/lib/your-container/fstab and add the following line : /dev/vg0/lv images ext3 defaults 0 0
  • restart the container, and check the nex volume is available : run mount without any argument.
  • If the LVM volume has been successfully mounted, move back the files backed up in /root/images-bak. Note there is no slash before images.
  • chmod 777 /images
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