Francisco Cabrita include

Docker Cheat Sheet

Why

"Docker interests me because it allows simple environment isolation and repeatability. I can create a run-time environment once, package it up, then run it again on any other machine. Furthermore, everything that runs in that environment is isolated from the underlying host (much like a virtual machine). And best of all, everything is fast and simple."

TL;DR, I just want a dev environment

Each of these commands will run an ad hoc http static server in your current (or specified) directory, available at http://localhost:8000. Use this power wisely.

Discussion on reddit.

Python 2.x

$ python -m SimpleHTTPServer 8000

Overview

This gist demonstrates how to run a docker container with nomad, using a wrapper script.

Why would you want to use this?

With the wrapper, we can more easily run the container in the way we need to and without being limited by Nomad's docker driver. For example, while Nomad will have great support for volumes in the future, it has no such support right now, and the driver does not expose a config parameter to tune the volumes mounted in the docker container. This is also a great way to use consul to lookup services before starting your app, or to retrieve credentials from Vault. When running legacy applications with nomad, the wrapper script is the place to put that type of look-up logic.

We use a wrapper script and the raw_exec driver to run the container with the parameters we need.

#System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

##Basic Steps

Clarify and agree on the scope of the system

User cases (description of sequences of events that, taken together, lead to a system doing something useful)
- Who is going to use it?
- How are they going to use it?

	#!/bin/bash
	#
	# PS1 magic
	#
	# Mostly copied from YUVAL KOGMAN version, added my own __git_ps1 stuff
	# Original: http://gist.github.com/621452
	#
	# See video demo of this at http://vimeo.com/15789794
	#
	# To enable save as .bash_prompt in $HOME and add to .bashrc:

	#!/bin/sh

	setup_brew () {
	if ![-f "/usr/local/bin/brew"]; then
	/usr/bin/ruby -e "$(/usr/bin/curl -fsSL https://raw.github.com/mxcl/homebrew/master/Library/Contributions/install_homebrew.rb)"
	fi
	}

	setup_ipython () {
	brew install gcc

	{
	"builders": [
	{
	"boot_command": [
	"<tab> linux enforcing=0 ks=http://rpm-ostree.cloud.fedoraproject.org/project-atomic/install/rawhide/fedora-atomic.ks<enter><wait>"
	],
	"boot_wait": "10s",
	"disk_size": 8192,
	"guest_additions_path": "VBoxGuestAdditions_{{.Version}}.iso",
	"guest_os_type": "Fedora_64",

	package main

	import (
	"fmt"
	"log"
	"os/exec"
	"runtime"
	)

	type Worker struct {

	ls -la
	echo "hello"
	tree
	adb devices
	adb wait-for-device #example of a long running task

	import sys
	from time import sleep

	import consul
	import consul_lock
	from docker import Client

	'''
	This is a PoC which uses consul's locking mechanism to ensure only
	one instance of the named docker container is running. Requires: