davewongillies

Supported built-in functions

• abs(float) - Returns the absolute value of a given float. Example: abs(1) returns 1, and abs(-1) would also return 1, whereas abs(-3.14) would return 3.14. See also the signum function.

• basename(path) - Returns the last element of a path.

• base64decode(string) - Given a base64-encoded string, decodes it and returns the original string.

lukeplausin

# Count total EBS based storage in AWS
aws ec2 describe-volumes | jq "[.Volumes[].Size] | add"
# Count total EBS storage with a tag filter
aws ec2 describe-volumes --filters "Name=tag:Name,Values=CloudEndure Volume qjenc" | jq "[.Volumes[].Size] | add"
# Describe instances concisely
aws ec2 describe-instances | jq '[.Reservations | .[] | .Instances | .[] | {InstanceId: .InstanceId, State: .State, SubnetId: .SubnetId, VpcId: .VpcId, Name: (.Tags[]|select(.Key=="Name")|.Value)}]'
# Wait until $instance_id is running and then immediately stop it again
aws ec2 wait instance-running --instance-id $instance_id && aws ec2 stop-instances --instance-id $instance_id

# Get 10th instance in the account

so0k

Kubectl output options

Let's look at some basic kubectl output options.

Our intention is to list nodes (with their AWS InstanceId) and Pods (sorted by node).

We can start with:

kubectl get no

yyolk

{
  "Records": [
    {
      "EventVersion": "1.0",
      "EventSubscriptionArn": "arn:aws:sns:EXAMPLE",
      "EventSource": "aws:sns",
      "Sns": {
        "SignatureVersion": "1",
        "Timestamp": "1970-01-01T00:00:00.000Z",
        "Signature": "EXAMPLE",

rossf7

#cloud-config

coreos:
 units:
   -
     name: amazon-ecs-agent.service
     command: start
     runtime: true
     content: |
       [Unit]

jmahowald

require 'thor'
require 'fileutils'
require 'yaml'


##
# common commands used to manage berks in a way that makes sense for that
# Inspired by the fact that berks is a great idea that is painfully slow
# when using mercurial, and thus needs to work around the prescribed workflow

ipedrazas

# knife cheat

## Search Examples

	knife search "name:ip*" 
	knife search "platform:ubuntu*"
	knife search "platform:*" -a macaddress
	knife search "platform:ubuntu*" -a uptime
	knife search "platform:ubuntu*" -a virtualization.system
	knife search "platform:ubuntu*" -a network.default_gateway

JC1738

#powershell

Set-Location c:\chef

#debugging, set to false, so don't execute run
$invokeRun = $true

#update these with teamcity parameters
$userName = "XXXXX"
$password = "XXXXX"

arangamani

# In Chef, when a resource is defined all its variables are evaluated during
# compile time and the execution of the resource takes place in converge phase.
# So if the value of a particular attribute is changed in converge
# (and not in compile) the resource will be executed with the old value.

# Example problem:
# Let's consider this situation where there are two steps involved in a recipe
# Step 1 is a Ruby block that changes a node attribute. Rubyblocks get executed
# in converge phase
# Step 2 is a Chef resource that makes use of the node attribute that was

turtlebender

#!/usr/bin/env python

"""
This module will bootstrap a machine using chef.  The purpose of this
script is actually to work with AWS Auto Scaling Groups.  The user data
for the Launch Configuration is set to download this script and then 
run it.  This is also stores the results in a private gist and sends
a message to logstash with the results.
"""