.. post:: 2019.08.10
   :tags: howto,ubuntu,gnu/linux,installation
   :category: gnu/linux
   :author: vladan
   :location: Belgrade

===========================
AutomaticCRM Ubuntu Desktop
===========================

Below are the steps taken to create the Ubuntu 18.04.2 installer for the needs
of AutomaticCRM according to the requirements ...

    Operating system

    * Only one domain is allowed ( dev.automaticcrm.ai ) in network adapter
    * No print screen functionality
    * No usb memory functionality
    * No access to the filesystem
    * No apps except browser



Steps to set up the build environment
=====================================


.. code-block:: bash

   mkdir disk
   sudo mount -o ubuntu-18.04.2-desktop-amd64.iso disk
   rsync --exclude=/casper/filesystem.squashfs -av disk/ livecd/


Set up the rootfs
=================

.. code-block:: bash

   unsquashfs disk/casper/filesystem.squashfs
   sudo systemd-nspawn \
       --directory squashfs-root/ \
       --bind ~/dev/automaticcrm/deb:/opt/deb  
       --bind /etc/resolv.conf /bin/bash

Once in the shell, run these commands:

.. code-block:: bash

    apt-get update
    apt-get -y purge \
        usb-creator-common \
        usb-creator-gtk \
        thunderbird-gnome-support \
        thunderbird \
        remmina-common \
        remmina \
        remmina-plugin-rdp \
        remmina-plugin-vnc \
        firefox* \
        libreoffice* \
        alsa* \
        cups* \
        gnome-screenshot \
        evince \
        gedit

    dpkg -i /opt/deb/google-chrome-stable_current_amd64.deb


Restrict domains
================

To redirect all domains to localhost, except dev.automaticcrm.ai, create the
file ``/etc/dnsmasq.d/autocrm.conf`` with these lines:

.. code-block:: ini

    address=/#/127.0.0.1
    server=/dev.automaticcrm.ai/8.8.8.8

Add this line to /etc/dnsmasq.conf

.. code-block:: ini

    conf-dir=/etc/dnsmasq.d


Run Chrome ONLY
===============

Override the path for all users.

Edit the desktop entry in ``/usr/share/xsessions/ubuntu.desktop`` so it starts
Chrome in fullscreen mode:

.. code-block:: ini

    [Desktop Entry]
    Name=Ubuntu
    Comment=This session logs you into Ubuntu
    Exec=env GNOME_SHELL_SESSION_MODE=ubuntu /usr/bin/google-chrome --kiosk https://dev.automaticcrm.ai
    Type=Application
    DesktopNames=ubuntu:AutomaticCRM
    X-Ubuntu-Gettext-Domain=gnome-session-3.0

.. note::

    If you want to change the domain, edit this file and also enable it in the
    dnsmqsq config above.

Remove USB drivers
==================

.. code-block:: bash

    printf "\n#AutomaticCRM disabled modules\nblacklist uas\nblacklist usb_storage\n" >> /etc/modprobe.d/blacklist.conf


Create the ISO
==============

Pack the squashfs image and copy it to casper.

.. code-block:: bash

    sudo mksquashfs squashfs-root/ livecd/casper/filesystem.squashfs


Recreate installation files and pack the ISO.

.. code-block:: bash

    printf $(sudo du -sx --block-size=1 squashfs-root | cut -f1) > livecd/casper/filesystem.size
    sudo systemd-nspawn --directory squashfs-root/ dpkg-query -W --showformat='${Package} ${Version}\n' > livecd/casper/filesystem.manifest
    sudo cp livecd/casper/filesystem.manifest{,-desktop}
    sudo rm livecd/md5sum.txt && sudo find livecd/ -type f -print0 | sudo xargs -0 md5sum | grep -v isolinux/boot.cat | sudo tee livecd/md5sum.txt

    mkisofs -r \
        -V "AutomaticCRM Ubuntu Linux" \
        -cache-inodes \
        -J -l -b isolinux/isolinux.bin \
        -c isolinux/boot.cat -no-emul-boot \
        -boot-load-size 4 \
        -boot-info-table \
        -o automaticcrm-ubuntu-18.04.2.iso livecd/

Test the installation in a vm
=============================

.. code-block:: bash

    rm -f ubuntu.qcow2
    qemu-img create -f qcow2 ubuntu.qcow2 40G
    virsh define ./autocrm.xml && virsh start ubuntu18.04