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IMUNES - an Integrated Multiprotocol Network Emulator / Simulator

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IMUNES GUI is a simple Tcl/Tk based management console, allowing for specification and management of virtual network topologies. The emulation execution engine itself operates within the operating system kernel.

System requirements

Operating system (FreeBSD)

When IMUNES is used on top of FreeBSD 8 (or higher) it requires a kernel that is compiled with the VIMAGE option included. A sample kernel config file is as follows:

include GENERIC
nooptions FLOWTABLE
options VIMAGE
options VNET_DEBUG
options KDB
options DDB

options IPSEC
device  crypto
options IPSEC_DEBUG
options IPSEC_NAT_T

To compile the VIMAGE enabled kernel you must have a copy of the FreeBSD kernel and create the config file with the above mentioned lines.

# cd /usr/src/sys/amd64/conf/ #for 64bit machines
# cd /usr/src/sys/i386/conf/  #for 32bit machines
# vi VIMAGE

Then you need to compile and install the kernel and reboot.

# config VIMAGE
# cd ../compile/VIMAGE

### standard compilation (single thread)
# make depend && make
### concurrent compliation (e.g. 4 threads)
# make -j4 depend && make -j4

# make install
# reboot

FreeBSD packages

First we need to install the packages required for IMUNES. To do this execute the following command (on FreeBSD 9.3 and higher):

# pkg install tk86 ImageMagick tcllib wireshark socat git gmake

Operating system (Linux)

When IMUNES is used on top of Linux a 3.10 Linux kernel is the minimum requirement.

Linux packages

First we need to install the packages required for IMUNES:

tcl (version 8.6 or greater)
tk (version 8.6 or greater)
tcllib
wireshark (with GUI)
ImageMagick
Docker (version 1.4 or greater)
OpenvSwitch
nsenter (part of the util-linux package since version 2.23 and later)
xterm
make (used for installation)

Note: on some distributions the netem module sch_netem required for link configuration is only available by installing additional kernel packages. Please check the availability of the module:

# modinfo sch_netem

Arch

# pacman -S tk tcllib wireshark-gtk imagemagick docker \
    make openvswitch xterm

Debian testing

# apt-get install openvswitch-switch docker.io xterm wireshark \
    ImageMagick tk tcllib util-linux make

Debian 8

### add jessie-backports to your sources.list and update
# echo "deb http://http.debian.net/debian jessie-backports main" >> /etc/apt/sources.list
# apt-get update

### install packages
# apt-get install openvswitch-switch docker.io xterm wireshark \
    ImageMagick tcl tcllib tk util-linux make

Fedora 22

# dnf install openvswitch docker-io xterm wireshark-gnome \
    ImageMagick tcl tcllib tk kernel-modules-extra util-linux
    
### add /usr/local/bin to root PATH variable to execute imunes as root
# echo 'PATH=$PATH:/usr/local/bin' >> /root/.bashrc

### add /usr/local/bin to sudo secure_path for executing sudo imunes
# visudo
Defaults    secure_path = /sbin:/bin:/usr/sbin:/usr/bin:/usr/local/bin

Ubuntu 15.04

# apt-get install openvswitch-switch docker.io xterm wireshark \
    make ImageMagick tk tcllib user-mode-linux util-linux

Ubuntu 14.04 LTS

### install needed packages
# apt-get install openvswitch-switch xterm wireshark make \
    ImageMagick tk tcllib user-mode-linux util-linux
    
### install new version of docker and start it
# wget -qO- https://get.docker.com/ | sh
# service docker start

### fetch remote nsenter which is not part of util-linux in ubuntu 14.04
# sudo docker run -v /usr/local/bin:/target jpetazzo/nsenter

OpenSUSE 13.2

### add repo with openvswitch
# zypper addrepo http://download.opensuse.org/repositories/network/openSUSE_13.2/network.repo
# zypper refresh

### install packages
# zypper install openvswitch-switch xterm wireshark docker \
    make ImageMagick tk tcllib uml-utilities util-linux
    
### add /usr/local/bin to sudo secure_path for executing sudo imunes
# visudo
Defaults secure_path="/usr/sbin:/usr/bin:/sbin:/bin:/usr/local/bin"

Performance

For best performance please run Docker with either Aufs or Overlay storage driver. Depending on your kernel version and distribution, Docker will automatically select its storage driver based on what is available and what the particular default setup for your distribution is. Aufs is not part of vanilla kernel but some distributions package it in their modified kernel and Overlay is only available from kernel version 3.18. Worst case scenario: Docker will use the extremely slow devicemapper available everywhere. Please view either Docker or distro docs on how to set this up for your particular Linux distribution.

Enabling overlayfs (kernel 3.18 and higher)

Debian testing, Ubuntu 14.04 LTS, Ubuntu 15.04:
# echo 'DOCKER_OPTS="-s overlay"' >> /etc/default/docker
# service docker restart

Fedora 22
# echo 'DOCKER_STORAGE_OPTIONS="-s overlay"' >> /etc/sysconfig/docker-storage
# systemctl restart docker

Arch:
# cp /usr/lib/systemd/system/docker.service /etc/systemd/system/docker.service
### add overlay to ExecStart
ExecStart=/usr/bin/docker daemon -s overlay -H fd://
### reload systemd files and restart docker.service
# systemctl daemon-reload
# systemctl restart docker


Check status with docker info:
# docker info | grep Storage
Storage Driver: overlay

Installing IMUNES

Checkout the last fresh IMUNES source through the public github repository:

# git clone https://github.com/imunes/imunes.git

Now we need to install IMUNES and populate the virtual file system with predefined and required data. To install imunes on the system execute (as root):

# cd imunes
# make install

Filesystem for virtual nodes

For the topologies to work a template filesystem must be created. This is done by issuing the following command (as root):

# imunes -p

Now the IMUNES GUI can be ran just by typing the imunes command in the terminal:

# imunes

To execute experiments, run it as root.

For additional information visit our web site: http://imunes.net/