lmars

class Deployer
  attr_accessor :current_id
  attr_reader :image

  def initalize(image)
    @image = image
  end

  def start
    self.current_id = run "docker run #{image}"

lmars

FROM ubuntu:precise

# Set DEBIAN_FRONTEND to non-interactive to avoid useless warnings
ENV DEBIAN_FRONTEND noninteractive

# Update apt sources
RUN apt-get update

# Support adding PPAs
RUN apt-get install -y python-software-properties

lmars

#!/usr/local/bin/ruby
#
# config-exec will render any files in /config and then exec
# whatever command was given on the command line.
#
# For example, if /config/etc/redis.conf.erb exists, then to
# render it into /etc/redis.conf and run Redis with the result:
#
# $ config-exec redis-server /etc/redis.conf

lmars

require "socket"
require "openssl"

puts OpenSSL::OPENSSL_VERSION

socket = TCPSocket.new("127.0.0.1", 8081)

ssl_version = ARGV[0].to_sym

ssl_context = OpenSSL::SSL::SSLContext.new

lmars

Keybase proof

I hereby claim:

• I am lmars on github.
• I am lmars (https://keybase.io/lmars) on keybase.
• I have a public key whose fingerprint is 6BFE 8AC3 30EA B9F9 317D 5837 9E4F E42F D94C 0795

To claim this, I am signing this object:

lmars

# flynn scale web=2
now=2014-06-02T15:14:46+0000 app=controller-scheduler fn=watchFormations app.id=6f98d85441b94de0bf003a40882db52a release.id=7afc7da66395445fa7a8372cdb915001 at=new
now=2014-06-02T15:14:46+0000 fn=rectify app.id=6f98d85441b94de0bf003a40882db52a release.id=7afc7da66395445fa7a8372cdb915001 type=web expected=2 actual=0 app=controller-scheduler at=update diff=2
now=2014-06-02T15:14:46+0000 app=controller-scheduler fn=add app.id=6f98d85441b94de0bf003a40882db52a release.id=7afc7da66395445fa7a8372cdb915001 host.id=00687624bf25 job.id=032bb075d20a44eb8108117be085b5cb
now=2014-06-02T15:14:46+0000 app=controller-scheduler fn=add app.id=6f98d85441b94de0bf003a40882db52a release.id=7afc7da66395445fa7a8372cdb915001 host.id=00687624bf25 job.id=75197216462545ed9d5cb0d84081fe12

# docker kill flynn-032bb075d20a44eb8108117be085b5cb
# job restarted immediately
now=2014-06-02T15:15:32+0000 app=controller-scheduler fn=watchHost host.id=00687624bf25 at=remove job.id=032bb075d20a44eb8108117be085b5cb event=stop
no

lmars

# log ICMP packets
sudo iptables -t raw -A OUTPUT -p icmp -j TRACE
sudo iptables -t raw -A PREROUTING -p icmp -j TRACE
sudo modprobe ipt_LOG

# in the container
ping -c 1 8.8.8.8

lmars

Game Of Life Rules

You have a grid of cells in 2 dimensions. Each cell has 2 possible states, alive or dead. Each cell has 8 neighbours: above, below, left, right, and the 4 diagonals.

• any life cell < 2 neighbours dies
• any life cell > 3 neighbours dies
• any live cell with 2 or 3 neighbours lives to next generation
• any dead cell with exactly 3 live neighbours becomes a live cell

lmars

NUMERALS = {
  'i' => 1,
  'v' => 5,
  'x' => 10,
  'l' => 50,
  'c' => 100,
  'd' => 500,
  'm' => 1000
}

lmars

string = 'ABCDE'

string.reverse.each_char do |numeral|
  # inside this block numeral will be a character from the string
  puts numeral
end

# This will output:
E
D