FELIX CHERUIYOT felixcheruiyot

Docker - How to cleanup (unused) resources

Once in a while, you may need to cleanup resources (containers, volumes, images, networks) ...

delete volumes

// see: https://github.com/chadoe/docker-cleanup-volumes

$ docker volume rm $(docker volume ls -qf dangling=true)

$ docker volume ls -qf dangling=true | xargs -r docker volume rm

Lately, I have been looking into Python CMSs. There are many out there, but for some reason or another Mezzanine stuck out as one I should try. Installing it is easy enough, but getting it up on running on my new favorite host, Heroku, was a bit of a challege.

Below you will find the steps that I took to get Mezzanine up and running on Heroku. Please let me know in the comments below if anything didn't work for you.

Setting up the Database

Heroku is shortly depricating Django's standard DATABASES dictionary in favor for a package which takes OS Environment Variables and builds the required dictionary for you. This is a good thing because it makes setting up a database on Heroku very easy. The package is called dj_database_url and it makes short work of getting a PostgreSQL database up and running with Mezzanine. Below is the code that you want to put in Mezzanine's DATABASES section:

import dj_database_url
DATABASES = {'default': dj_database_url.config(default='postgres://localhost')}

1. Clone your fork:

git clone git@github.com:YOUR-USERNAME/YOUR-FORKED-REPO.git

2. Add remote from original repository in your forked repository:

cd into/cloned/fork-repo
git remote add upstream git://github.com/ORIGINAL-DEV-USERNAME/REPO-YOU-FORKED-FROM.git
git fetch upstream

	pragma solidity ^0.4.16;

	contract AcademicRegistry {
	address admin;
	enum Permissions {
	CanEnrollCandidate,
	CanUpdateProgram,
	CanUpdateUnits,
	CanUpdateStaff,
	CanClearCandidate,

	pragma solidity ^0.4.16;

	contract AcademicRegistry {
	struct Certificate {
	string admissionNumber;
	uint enrollmentDate;
	string degreeCode;
	uint unitsTaken;
	bool feesPaid;
	bool isCleared;

	var fs = require("fs")
	var ssl_options = {
	key: fs.readFileSync('privatekey.pem'),
	cert: fs.readFileSync('certificate.pem')
	};

	var port = process.env.PORT \|\| 3000;
	var express = require('express');
	var ejs = require('ejs');
	var passport = require('passport')

	echo 'export PATH=$HOME/local/bin:$PATH' >> ~/.bashrc
	. ~/.bashrc
	mkdir ~/local
	mkdir ~/node-latest-install
	cd ~/node-latest-install
	curl http://nodejs.org/dist/node-latest.tar.gz \| tar xz --strip-components=1
	./configure --prefix=~/local
	make install # ok, fine, this step probably takes more than 30 seconds...
	curl https://www.npmjs.org/install.sh \| sh