anchor.diff:  # acknowledge the contributions of their colleagues of the SONATA
   # partner consortium (www.sonata-nfv.eu).
   
  -FROM python:3.4-slim
  +FROM python:3.5-slim
   MAINTAINER SONATA
   
   # configrurations
  
positive.code: RUN python setup.py install
  
  # run fsm
  ADD fsm/vpn-config /vpn-config
  
  WORKDIR /vpn-config
  RUN python setup.py develop
  
negative.code: # install package dependencies
  RUN apt-get clean \
      && apt-get update \
      && apt-get install -y wget git build-essential libffi-dev libssl-dev \
      && wget https://download.docker.com/linux/static/stable/x86_64/docker-17.06.2-ce.tgz \
      && tar -xzf docker-*-ce.tgz \
      && cp docker/docker /usr/bin/ \
      && rm -rf docker-*-ce.tgz docker \
      && pip install --no-cache-dir ansible docker \
      && sed -i 's/def __init__(self, verbosity=0)/def __init__(self, verbosity=4)/' '/usr/local/lib/python3.5/site-packages/ansible/utils/display.py' \
      && apt-get clean
  
  
  # clone son-sm repo to install dependencies
  RUN git clone --recursive https://github.com/sonata-nfv/son-sm.git
  