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How to create a LXC Ubuntu root filesystem for VNX

Basic installation

Follow this procedure to create a Ubuntu based LXC root filesystem for VNX. The procedure has been tested over Ubuntu 13.10.

  • Create the rootfs with:
  • lxc-create -t ubuntu -n vnx_rootfs_lxc_ubuntu-13.10

    Note1: The default username/password is ubuntu/ubuntu.
    Note2: using the linux32 command it should be posible to create a 32 bits image from a 64 bits machine, that is:

    linux32 lxc-create -t ubuntu -n vnx_rootfs_lxc_ubuntu

    but it does not work...why?

  • Move the rootfs to VNX filesystems directory:
  • mv /var/lib/lxc/vnx_rootfs_lxc_ubuntu-13.10/ /usr/share/vnx/filesystems/
  • Edit the rootfs configuration file (/usr/share/vnx/filesystems/vnx_rootfs_lxc_ubuntu-13.10-v025/config) to reflect the directory change:
  • lxc.rootfs = /usr/share/vnx/filesystems/vnx_rootfs_lxc_ubuntu-13.10/rootfs
    lxc.mount  = /usr/share/vnx/filesystems/vnx_rootfs_lxc_ubuntu-13.10/fstab
  • Start the new rootfs to configure it and install new software:
  • lxc-start -n vnx_rootfs_lxc_ubuntu-13.10-v025 -F -f /usr/share/vnx/filesystems/vnx_rootfs_lxc_ubuntu-13.10/config
  • Once the VM has started, make login (ubuntu/ubuntu) and:
    • Add VNX user and change the passwords:
    • sudo adduser vnx
      sudo adduser vnx sudo
      sudo passwd root
    • Update and install software:
    • sudo apt-get update
      sudo apt-get dist-upgrade
      sudo apt-get install aptsh openssh-server traceroute telnet nmap apache2 wget tcpdump
      update-rc.d -f apache2 remove   # to avoid automatic start
    • Change VM name in hosts and hostname files:
    • sudo vi /etc/hosts         # change name to vnx
      sudo vi /etc/hostname      #     "
    • Important: edit /etc/network/interfaces and coment "inet dhcp" lines to avoid delays at startup. Besides, edit /etc/init/failsafe.conf and change all "sleep XX" commands to "sleep 1".
  • Stop the VM with:
  • halt
  • Optionally, create a short link to the rootfs:
  • cd /usr/share/vnx/filesystems
    ln -s vnx_rootfs_lxc_ubuntu-13.10 rootfs_lxc