Chris Parnin chrisparnin

TLDR: I now add the following snippet to all my Dockerfiles:

# If host is running squid-deb-proxy on port 8000, populate /etc/apt/apt.conf.d/30proxy
# By default, squid-deb-proxy 403s unknown sources, so apt shouldn't proxy ppa.launchpad.net
RUN route -n | awk '/^0.0.0.0/ {print $2}' > /tmp/host_ip.txt
RUN echo "HEAD /" | nc `cat /tmp/host_ip.txt` 8000 | grep squid-deb-proxy \
  && (echo "Acquire::http::Proxy \"http://$(cat /tmp/host_ip.txt):8000\";" > /etc/apt/apt.conf.d/30proxy) \
  && (echo "Acquire::http::Proxy::ppa.launchpad.net DIRECT;" >> /etc/apt/apt.conf.d/30proxy) \
  || echo "No squid-deb-proxy detected on docker host"

Work

Principles, myths and more

Less software
The monkey on your back
Deliberate work
Adding people to a project makes it later
Murphy's law
Peter principle

Freezer cgroup FTW

In a terminal start a server.

$ python -m SimpleHTTPServer 8000

In another terminal set up the cgroups freezer.

	#!/usr/bin/env python
	"""
	from https://gist.github.com/JoeGermuska/561347
	Like cut, but for CSVs. To be used from a shell command line.

	Note that fields are 1-based, similar to the UNIX 'cut' command.

	Should use something better than getopt, but this works...

	Usage:

	#!/bin/bash

	#####
	#
	# Deploy a PDF file annotated with the latest git version
	# to your Amazon S3 bucket.
	#
	# This script requires you are running on a Mac with
	# homebrew installed and a S3 bucket setup.
	#

	# Add this snippet to the top of your playbook.
	# It will install python2 if missing (but checks first so no expensive repeated apt updates)
	# [email protected]

	- hosts: all
	gather_facts: False

	tasks:
	- name: install python 2
	raw: test -e /usr/bin/python \|\| (apt -y update && apt install -y python-minimal)

	<?xml version="1.0" encoding="UTF-8"?>
	<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
	<plist version="1.0">
	<dict>
	<key>CFBundleExecutable</key>
	<string>myapp</string>
	<key>CFBundleIdentifier</key>
	<string>com.pocketgophers.myapp</string>
	<key>CFBundleURLTypes</key>
	<array>

	import imaplib

	HOST = "imap.gmail.com"
	USER = "[email protected]"
	PASSWORD = "---"

	BATCH_FOLDER = "Batch"
	INBOX_FOLDER = "\\Inbox"

	from z3 import *

	n = 10

	vars = []

	def getConstraint(v, x, y):
	if x < 0 or x >= n or y < 0 or y >= n:
	return False
	return v == (1 + vars[x][y])