anchor.diff:  #     gpg --verify coreos_production_pxe_image.cpio.gz.sig
   
   
  -# RUN chmod 644 pxe/pxelinux.cfg/default && \
  -#     chmod 644 pxe/pxelinux.0 && \
  -#     chmod 644 pxe/coreos_production_pxe_image.cpio.gz && \
  -#     chmod 644 pxe/coreos_production_pxe.vmlinuz
  -
   # Customizations
   ENV INTERFACE=eth1
   
  
positive.code: # Install pxelinux.0
  RUN mkdir app/tftp && cp /usr/lib/syslinux/pxelinux.0 /app/tftp
  
  # Install coreos pxe images
  RUN cd /app/tftp && \
      wget -q http://stable.release.core-os.net/amd64-usr/current/coreos_production_pxe.vmlinuz
  
  # Download image to /tmp
  RUN cd /tmp && \
      wget -q http://stable.release.core-os.net/amd64-usr/current/coreos_production_pxe_image.cpio.gz
  
  # Extract and combine with /oem
  RUN mkdir /tmp/initrd && \
      cd /tmp/initrd && \
      cat /tmp/coreos_production_pxe_image.cpio.gz | gzip -d | cpio -i && \
      cp -R /oem/* . && \
      find | cpio -o --format=newc | gzip -9c > /app/tftp/coreos_production_pxe_image_oem.cpio.gz
  
  # Cleanup
  
negative.code: echo "deb http://vesta.informatik.rwth-aachen.de/ftp/pub/Linux/ubuntu/ubuntu/ trusty-backports main restricted universe multiverse" >> /etc/apt/sources.list
  
  # Install deps
  RUN apt-get update && apt-get install -y dnsmasq syslinux wget openssh-server openssh-client php5-cli squashfs-tools
  
  COPY app /app
  COPY oem /oem
  