#Network_Topology

#License
Copyright 2015 Jatinshravan

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

#What does this tool do? This tool creates virtual machines and a network topology between them based on a config file in JSON format present in the 'conf' directory.

VMs can either be switch VMs or standard Linux VMs. It currently uses KVM as the hypervisor and can be easily extended for using other hypervisors. It supports both Linux bridge and OpenVSwitch bridge as the network bridges for interconnecting the VMs.

nw_topo.py is the main script. It can be run with three options. Run it as

  nw_topo.py --help

to get a list of options.

ISO_DIR is the place where you must put your ISO files and VMDK files if necessary for the VM to boot. The tool loads these ISO files and creates either a blank disk image or a copy of the VMDK file you have specified, in the working directory, which is './working_dir'.

The ISO files must be named as the version of the VM. For example a VM with version of 'ubuntu_15' will have an ISO called 'ubuntu_15.iso' in the ISO_DIR. The same goes for VMDK files.

#Installation Run

  git clone https://github.com/Pathangi-Jatinshravan/Network_Topology.git 

to get the latest version of the tool.

Also make sure the required packages are installed before running the nw_topo.py script. You want:

1)bridge-utils

2)ovs-vsctl

3)qemu-kvm

4)libvirt-bin

5)virt-manager

Move the ISO files of the VMs you want to be created, along with any VMDK files they need for booting, into a directory, and specify this directory as the ISO_DIR in the config.json file under the 'COMMON' heading.