toddlers

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

toddlers

require 'facter'
require 'json'
 
if Facter.value("ec2_instance_id") =! nil
 instance_id = Facter.value("ec2_instance_id")
 tags = Facter::Util::Resolution.exec("aws ec2 describe-tags --filters \"name=resource-id,values=#{instance_id}\" --region sa-east-1 | jq '[.Tags[] | {key: .Key, value: .Value}]'")
 
 parsed_tags = JSON.parse(tags)
 parsed_tags.each do |tag|
  fact = "ec2_tag_#{tag["key"]}"

toddlers

An example implementation of the self-pipe trick in Ruby, by Paul Annesley (found here: http://pastebin.com/1SZprwZm)

Further reading:

• D.J. Berstein - The self-pipe trick - http://cr.yp.to/docs/selfpipe.html
• Alex Pennace - Safe UNIX Signal Handling Tips - http://osiris.978.org/~alex/safesignalhandling.html
• Ryan Tomayko - I like Unicorn because it's Unix - http://tomayko.com/writings/unicorn-is-unix
• Unicorn Sourcecode - http://bogomips.org/unicorn.git/tree/lib/unicorn/http_server.rb
• man 2 select

toddlers

# see the changes for a file, even if it was deleted
git log -- [file_path]
 
# limit the output to only the last commit that touched the file
git log -1 -- [file_path]
 
# include some statistics, eg. how many files were deleted
git log -1 --stat -- [file_path]

toddlers

Apache Oozie
=============

What is Oozie
--------------

Oozie is an extensible, scalable and reliable system to define, manage, schedule, and execute complex Hadoop workloads via web services. More specifically, this includes:

  * XML-based declarative framework to specify a job or a complex workflow of dependent jobs.
  * Support different types of job such as Hadoop Map-Reduce, Pipe, Streaming, Pig, Hive and custom java applications.

toddlers

# OS X Go Setup

# Assumes: 
# + Homebrew has been installed correctly.
# + Homebrew-cask has been tapped and installed correctly.


# Install Go lang latest (1.1.1 as of May 13, 2013)
###############################################################################
brew install go

toddlers

    <% if @colo == "a" then -%>
        server server1 foo1.com:8088 check port 8088 inter 5000 rise 2 fall 3 maxconn 5000
        server server2 foo2.com:8088 check port 8088 inter 5000 rise 2 fall 3 maxconn 5000
        server server3 foo3.com:8088 check port 8088 inter 5000 rise 2 fall 3 maxconn 5000
    <% elsif @colo == "b" then -%>
        server server1 foo1.com:8088 check port 8088 inter 5000 rise 2 fall 3 maxconn 5000
        server server2 foo2.com:8088 check port 8088 inter 5000 rise 2 fall 3 maxconn 5000
        server server3 foo3.com:8088 check port 8088 inter 5000 rise 2 fall 3 maxconn 5000
    <% elsif @colo == "c" then -%>
        server server1 foo1.com:8088 check port 8088 inter 5000 rise 2 fall 3 maxconn 5000

toddlers

global
        log 127.0.0.1 local1 info info
        user haproxy
        group haproxy
        daemon
        #quiet
        #debug
        stats socket /var/run/haproxy/haproxy.sock mode 0600 level admin

defaults

toddlers

Adding a serverA ipA:portA to the 'query_backend':
echo "add server query_backend/serverA ipA:portA check inter 3000 rise 2 fall 3 maxconn 50" | socat stdio unix-connect:/var/haproxy.socket

Removing serverA again:
echo "remove server query_backend/serverA" | socat stdio unix-connect:/var/haproxy.socket

toddlers

#!/bin/bash
 
while :
do
    clear
    git --no-pager log --graph --pretty=format:'%Cred%h%Creset -%C(yellow)%d%Creset %s %Cgreen(%ci) %C(bold blue)<%an>%Creset' --abbrev-commit --date=relative --all
    sleep 1
done