Vnx-install-ubuntu3

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 18.04 and older versions change 'libvirt-clients' by 'libvirt-bin':

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 \
  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 libvirt-clients 

• 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/libvirt.so.0: 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-*
wget http://vnx.dit.upm.es/vnx/vnx-latest.tgz
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' ...
• In Ubuntu 20.04 and later, the command lxc-console does not work. Change the configuration of consoles in /etc/vnx.conf to use lxc-attach command:

lxc_console_cmd=lxc-attach

• In Ubuntu 24.04, the bridge virbr0 is not created by default. To create it at startup, just create the following symbolic link and reboot:

ln -s /etc/libvirt/qemu/networks/default.xml /etc/libvirt/qemu/networks/autostart/

• Download root file systems from http://vnx.dit.upm.es/vnx/filesystems 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
  fi
fi

Additional install steps for Dynamips support

• Install Dynamips and Dynagen:

apt-get install dynamips dynagen

• Create a file /etc/init.d/dynamips (taken from http://7200emu.hacki.at/viewtopic.php?t=2198):

#!/bin/sh
# Start/stop the dynamips program as a daemon.
#
### BEGIN INIT INFO
# Provides:          dynamips
# Required-Start:
# Required-Stop:
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Cisco hardware emulator daemon
### END INIT INFO

DAEMON=/usr/bin/dynamips
NAME=dynamips
PORT=7200
PIDFILE=/var/run/$NAME.pid 
LOGFILE=/var/log/$NAME.log
DESC="Cisco Emulator"
SCRIPTNAME=/etc/init.d/$NAME

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)
        status_of_proc -p $PIDFILE $DAEMON $NAME && exit 0 || exit $? 
        #status $NAME
        #RETVAL=$?
        ;; 
*)      log_action_msg "Usage: $SCRIPTNAME {start|stop|restart|status}"
        exit 2
        ;;
esac
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

• Calculate the idle-pc value for your computer following the procedure in http://dynagen.org/tutorial.htm:

dynagen /usr/share/vnx/examples/R3640.net
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.