How to: Create Printer Cluster Image

Warning: This instructionals may be functional, but the provided files are not! The scanner is completely untested and the webserver is in a stage of heavy testing!!

This Page will have a full documentation on how the Printer Cluster Image is created, so it can be reproduced or modified. This will of course be an advanced process, so the reader should have a basic understanding about linux in general and SSH in specific.

Creating the Image

As a basic, we use Octopi, therefore our basic assumption is the use of the octopi image found here: Link

However, this set of rules should work basically on every Debian based system (like Ubuntu), some commands may need adjustment and of course there should be about the same folder structure regarding the location of octoprint and it's configuration folders. There is however nothing ARM specific involved so there is nothing strictly speaking against porting the system to a desktop or laptop.

For a manual on how to write the octopi to an SD card and connect it to the network look here How_to:Write_Image_to_SD_Card

The custom setup

After logging into the pi with SSH (basic credentials: pi, raspberry) we can start customizing the image to fit our needs. The credentials and data for setting up the Printer Cluster System are collected together in a zip found here File:PrinterClusterData.zip.

This File contains a Readme with a full step by step manual on how the image Printer Cluster image was created additionaly to all files that are needed for the setup (the instructions are also listed below). For getting the files and readme onto the pi we may use wget, taking the file directly from the wiki.

When the (command line) instructions of the readme or below are followed, we should have the system ready, after reboot it should recognize all attached 3d Printer.

Instructions

sudo raspi-config

   <-- Expand File System, Change User Password, change hostname to 'replab'

sudo -i

apt-get purge haproxy -y

service octoprint stop

apt-get update

apt-get upgrade -y

apt-get install screen htop apache2 libapache2-mod-wsgi python-flask python-serial freecad -y

a2enmod wsgi

rm /etc/apache2/sites-enabled/000-default.conf

   Place Files, the folder RepLabHUB gets placed in /var/www 
   The .conf file to /etc/apache2/sites-available/
   Lastly, the scripts folder in /home/pi/scripts
   The .local file into /etc/ (yes, override)
   
   Moving a folder means NOT moving the folder contents there, but the folder itself

a2ensite RepLabHUB

echo "www-data ALL=(ALL) NOPASSWD: /sbin/reboot" >> /etc/sudoers

chown -R www-data:www-data /var/www/RepLabHUB

reboot

Little addendum: The reboot will result in the start of the completed Server, this means for perfect efficiency, plug in your Printers BEFORE doing the last step, they will be recognized and available on restart. Otherwise, you have to start a scan manually after plugging in the printers