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VNX Installation over Ubuntu

This section describes the procedure for manually installing VNX over Ubuntu 13.*, 14.*, 15.*, 16.*, 17.*, 18.* and 20.*.

Open a root shell window and follow these steps:

  • Install all packages required (basic development, virtualization, perl libraries and auxiliar packages). In case of Ubuntu 18.10 and 20.* change 'libvirt-bin' by 'libvirt-clients':
  • sudo apt-get update
    sudo apt-get install \
      bash-completion bridge-utils curl eog expect genisoimage gnome-terminal \
      graphviz libappconfig-perl libdbi-perl liberror-perl libexception-class-perl \
      libfile-homedir-perl libio-pty-perl libmath-round-perl libnetaddr-ip-perl \
      libnet-ip-perl libnet-ipv6addr-perl libnet-pcap-perl libnet-telnet-perl \
      libreadonly-perl libswitch-perl libsys-virt-perl libterm-readline-perl-perl \
      libvirt-bin libxml-checker-perl libxml-dom-perl libxml-libxml-perl \
      libxml-parser-perl libxml-tidy-perl lxc lxc-templates net-tools \
      openvswitch-switch picocom pv qemu-kvm screen tree uml-utilities virt-manager \
      virt-viewer vlan w3m wmctrl xdotool xfce4-terminal xterm lsof
  • Tune libvirt configuration to work with VNX. In particular, edit /etc/libvirt/qemu.conf file and set the following parameters (see this simple script to do it):
  • security_driver = "none"
    user = "root"
    group = "root"
    cgroup_device_acl = [
       "/dev/null", "/dev/full", "/dev/zero",
       "/dev/random", "/dev/urandom",
       "/dev/ptmx", "/dev/kvm", "/dev/kqemu",
       "/dev/rtc", "/dev/hpet", "/dev/vfio/vfio", "/dev/net/tun"

    (you have to add "/dev/net/tun") and restart libvirtd for the changes to take effect:

    sudo restart libvirt-bin                # for ubuntu 14.10 or older
    sudo systemctl restart libvirt-bin      # for ubuntu 15.04 or 16.04
    sudo systemctl restart libvirtd         # for ubuntu 18.04 or later
  • Check that libvirt is running correctly, for example, executing:
  • sudo virsh list
    sudo virsh capabilities

    Note: Have a look at this document in case you get an error similar to this one:

    virsh: /usr/lib/ version LIBVIRT_PRIVATE-XXX not found (required by virsh)
  • Install VNX:
  • mkdir /tmp/vnx-update
    cd /tmp/vnx-update
    rm -rf /tmp/vnx-update/vnx-*
    tar xfvz vnx-latest.tgz
    cd vnx-*-*
    sudo ./install_vnx
  • Restart apparmor:
  • service apparmor restart       # for Ubuntu 14.10 or older
    systemctl restart apparmor     # for Ubuntu 15.04 or later 
  • Create the VNX config file (/etc/vnx.conf). You just can move the sample config file:
  • sudo mv /usr/share/vnx/etc/vnx.conf.sample /etc/vnx.conf
  • For Ubuntu 15.04 or newer: change parameter 'overlayfs_workdir_option' in vnx.conf to 'yes'
  • [lxc]
    overlayfs_workdir_option = 'yes'
  • For Ubuntu 16.04 or later: change the LXC union_type to 'overlayfs' [lxc] ... union_type='overlayfs' ...
  • Download root file systems from and install them following these instructions
  • Optionally, enable bash-completion in your system to allow using VNX bash completion capabilities. For example, to enable it for all users in your system, just edit '/etc/bash.bashrc' and uncomment the following lines:
  • # enable bash completion in interactive shells
    if ! shopt -oq posix; then
      if [ -f /usr/share/bash-completion/bash_completion ]; then
        . /usr/share/bash-completion/bash_completion
      elif [ -f /etc/bash_completion ]; then
        . /etc/bash_completion

Additional install steps for Dynamips support

  • Install Dynamips and Dynagen:
apt-get install dynamips dynagen
# Start/stop the dynamips program as a daemon.
# Provides:          dynamips
# Required-Start:
# Required-Stop:
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Cisco hardware emulator daemon

DESC="Cisco Emulator"

test -f $DAEMON || exit 0

. /lib/lsb/init-functions

case "$1" in
start)  log_daemon_msg "Starting $DESC " "$NAME"
        start-stop-daemon --start --chdir /tmp --background --make-pidfile --pidfile $PIDFILE --name $NAME --startas $DAEMON -- -H $PORT -l $LOGFILE
        log_end_msg $?
stop)   log_daemon_msg "Stopping $DESC " "$NAME"
        start-stop-daemon --stop --quiet --pidfile $PIDFILE --name $NAME
        log_end_msg $?
restart) log_daemon_msg "Restarting $DESC " "$NAME"
        start-stop-daemon --stop --retry 5 --quiet --pidfile $PIDFILE --name $NAME
        start-stop-daemon --start --chdir /tmp --background --make-pidfile --pidfile $PIDFILE --name $NAME --startas $DAEMON -- -H $PORT -l $LOGFILE
        log_end_msg $?
        status_of_proc -p $PIDFILE $DAEMON $NAME && exit 0 || exit $? 
        #status $NAME
*)      log_action_msg "Usage: $SCRIPTNAME {start|stop|restart|status}"
        exit 2
exit 0

  • Set execution permissions for the script and add it to system start-up:
chmod +x /etc/init.d/dynamips
update-rc.d dynamips defaults
/etc/init.d/dynamips start
  • Download and install cisco IOS image:
 cd /usr/share/vnx/filesystems
 # Cisco image
 wget ... c3640-js-mz.124-19.image
 ln -s c3640-js-mz.124-19.image c3640
dynagen /usr/share/vnx/examples/
console R3640     # type 'no' to exit the config wizard and wait 
              # for the router to completely start 
idlepc get R3640

Once you know the idlepc value for your system, include it in /etc/vnx.conf file.