Ronnie Beltran ronbeltran

Background

I believe Ubuntu 16.04 comes with PostgreSQL 9.5. Thats good for a start, but it is a matter of time before you have the need of a PostgreSQL 9.6 cluster. For me it was to import a PG backup from Heroku.

The procedure couldn't have been any easier and is described below. If you are interested in upgrading your old cluster to 9.6 afterwards, you may be interested in this.

Instructions

Diagnosing Redis errors on the client side

Customers periodically ask "Why am I getting errors when talking to Redis". The answer is complicated - it could be a client or server side problem. In this article, I am going to talk about client side issues. For server side issues, see here

Clients can see connectivity issues or timeouts for several reason, here are some of the common ones I see:

Memory pressure

Guide on how to create and set up your Django project with webpack, npm and ReactJS :)

Hopefully this will answer "How do I setup or start a Django project?" I was trying to set up my own website, and there was a lot to read, learn and digest! Therefore, I put this together which is a collection of all the guides/blog posts/articles that I found the most useful. At the end of this, you will have your barebones Django app configured and ready to start building :)

NOTE: This guide was built using Django 1.9.5, NodeJS 4+ with NPM 3+

	daemon off;
	# Heroku dynos have at least 4 cores.
	worker_processes <%= ENV['NGINX_WORKERS'] \|\| 4 %>;

	events {
	use epoll;
	accept_mutex on;
	worker_connections 1024;
	}

	#!/bin/bash
	###############################################
	# To use:
	# https://raw.github.com/gist/2776351/???
	# chmod 777 install_postgresql.sh
	# ./install_postgresql.sh
	###############################################
	echo "*****************************************"
	echo " Installing PostgreSQL"
	echo "*****************************************"

	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

	sudo yum install gcc
	sudo yum install zlib-devel
	sudo yum install openssl-devel
	sudo yum install bzip2-devel
	sudo yum install readline-devel

	wget https://www.python.org/ftp/python/3.4.1/Python-3.4.1.tgz
	tar -xvf Python-3.4.1.tgz
	cd Python-3.4.1/

	from django.contrib import admin
	from django.contrib.flatpages.models import FlatPage

	# Note: we are renaming the original Admin and Form as we import them!
	from django.contrib.flatpages.admin import FlatPageAdmin as FlatPageAdminOld
	from django.contrib.flatpages.admin import FlatpageForm as FlatpageFormOld

	from django import forms
	from ckeditor.widgets import CKEditorWidget

	# This specifies the deployment process on AWS ElasticBeanstalk for a Django app using npm and Postgres.
	#
	# The target environment should have access to a Postgres Database through environment variables.
	# The environment can be setup using `eb create --database.engine=postgres`
	# The necessary environment variables to access the database will be automatically defined on the
	# instances of that environment.
	#
	# In addition, the target environment should define environment variables (django secret key ...).
	# They can be manually defined using the AWS ElasticBeanstalk interface on the web.
	# They can also be specified when creating the environment from command line, for example: