Nathan Lee X0nic

How to set up your VPS with Chef Solo

1. What is it?

There are many different provisioning tools out there, the most popular of which are Chef and Puppet. Chef uses Ruby, Puppet uses a DSL (Domain Specific Language), there are others that use simple bash too, but today we're going to focus on Chef Solo.

2. Dependencies

To get Chef working properly on your local machine you need a few things.

Make sure you use Ruby 1.9.x and not Ruby 2.x as you will get errors with the json 1.6.1 gem on 2.x. Use rbenv or RVM to manage several different Rubies on the one machine.

In Rails 3

NOTE: This post now lives (and kept up to date) on my blog: http://hakunin.com/rails3-load-paths

If you add a dir directly under app/

Do nothing. All files in this dir are eager loaded in production and lazy loaded in development by default.

If you add a dir under app/something/

a simple git branching model (written in 2013)

This is a very simple git workflow. It (and variants) is in use by many people. I settled on it after using it very effectively at Athena. GitHub does something similar; Zach Holman mentioned it in this talk.

Update: Woah, thanks for all the attention. Didn't expect this simple rant to get popular.

How-to : Crashplan & Freenas

Pre-requisites

Crashplan account
FreeNAS-9.1.1-RELEASE-x64 (a752d35)

Install

Step 0: Skip if you are using existing install

Auto-enable Local HTTP Caching in Test Kitchen

Note: total experiment and hack, looks nasty, could be awesome:

Setup

Drop the kitchen.local.yml into $HOME/.kitchen/config.yml
Install polipo (with Mac: brew install polipo, with Ubuntu: apt-get install polipo)
Drop polipo-start and polipo-console somewhere useful (perhaps $HOME/bin?)

	#
	# Author:: Christopher Peplin (<[email protected]>)
	# Copyright:: Copyright (c) 2010 Bueda, Inc.
	# License:: Apache License, Version 2.0
	#
	# Licensed under the Apache License, Version 2.0 (the "License");
	# you may not use this file except in compliance with the License.
	# You may obtain a copy of the License at
	#
	# http://www.apache.org/licenses/LICENSE-2.0

	#!/bin/bash

	libs=( "/usr/local/lib/libmacfuse_i32.2.dylib" \
	"/usr/local/lib/libosxfuse_i32.2.dylib" \
	"/usr/local/lib/libosxfuse_i64.2.dylib" \
	"/usr/local/lib/libmacfuse_i64.2.dylib" \
	"/usr/local/lib/libosxfuse_i32.la" \
	"/usr/local/lib/libosxfuse_i64.la" \
	"/usr/local/lib/pkgconfig/osxfuse.pc" )

	#Overrides the default way how rails marks form fields with errors.
	#In this version, it only adds the class 'error' to label and element

	ActionView::Base.field_error_proc = Proc.new do \|html_tag, instance\|
	if html_tag =~ /<(input\|label\|textarea\|select)/
	html_field = Nokogiri::HTML::DocumentFragment.parse(html_tag)
	html_field.children.add_class 'error'
	html_field.to_s
	else
	html_tag

	If you only want to send a hook for successful builds at the end of your test commands add something like:

	wget YOUR_URL

	and it will send the hook whenever your build passes. You can run any command there and aren't limited to wget or anything at all.

	2) Send a hook for a failed command and fail the build:

	SOME_COMMAND \|\| bash -c "ANY_COMMAND_TO_SEND_HOOK; exit 1"

	# to generate your dhparam.pem file, run in the terminal
	openssl dhparam -out /etc/nginx/ssl/dhparam.pem 2048