Malefs malefs

Here's how to save and load docker images:

Example scenario: To save a docker image from a docker repository and save it as a tar file locally.

Save the image as a tarball

docker save repositoryname:tag > repotag.tar

Zip the image

Setup

Headless reinstall and update https://raspberrypi.stackexchange.com/a/57023

Enable SSH on the SD Card

create a text file in /boot/ called ssh

Once you can SSH in:

Python Flask + nginx + gunicorn

Setting up a python flask web application using nginx, gunicorn and systemd on a Rasperry Pi

In the following, we assume a working Flask application with the name of SCRIPT_NAME. First we need to install a couple of things:

sudo apt-get update && sudo apt-get upgrade

Installing nginx will fail if apache is running. If your installation breaks half ways, then remove the fragments, stop apache (and I actually suggest removing it in case not needed) and then install nginx again:

sudo apt-get remove nginx* --purge

sudo /etc/init.d/apache2 stop

	First install pip for Python2. Download the get-pip.py file from https://bootstrap.pypa.io/get-pip.py
	$ cd <download location>
	$ sudo -H python ./get-pip.py

	Installing pip also installs Python3
	To run Python3
	$ python3

	Install pip3 by just executing the same file as in the step above, but this time using Python3
	$ sudo -H python3 ./get-pip.py

	# mongo_test_restaurants.py
	# Python 2.7.6

	"""
	Test script to connect to MongoDB collections using pymongo library
	Connects to an already imported connection named "restaurants"
	source - https://docs.mongodb.org/getting-started/python/
	"""

	from pymongo import MongoClient, ASCENDING, DESCENDING

	#-- coding: utf-8 --
	u"""
	MOD: pymongo
	"""


	import pymongo


	#===============================================================================

	# -- coding: utf-8 --
	import paho.mqtt.client as mqtt
	import time
	import json
	import base64

	def on_connect(client, userdata, flags, rc):
	print("Connected with result code " + str(rc))

	dev_eui = 'ZZZZZ'

	#!/bin/bash

	##
	# File:
	# nginx_modsite
	# Description:
	# Provides a basic script to automate enabling and disabling websites found
	# in the default configuration directories:
	# /etc/nginx/sites-available and /etc/nginx/sites-enabled
	# For easy access to this script, copy it into the directory:

	#!/bin/python

	import os
	from flask import Flask, Response, request, abort, render_template_string, send_from_directory
	import Image
	import StringIO

	app = Flask(__name__)

	WIDTH = 1000

	#!/usr/bin/env python

	import io
	import time
	import picamera
	import picamera.array
	import numpy as np
	from PIL import Image, ImageDraw