maxivak

Building Docker image with Packer and provisioning with Ansible

Overview

Packer

• Packer is used to build image from a base image, perform provisions and store (commit) the final image.

• We use provisioners and Packer templates to do the actual work to create the final image.

• We use Ansible for provisioning.

maxvt

Currently, there is an explosion of tools that aim to manage secrets for automated, cloud native infrastructure management. Daniel Somerfield did some work classifying the various approaches, but (as far as I know) no one has made a recent effort to summarize the various tools.

This is an attempt to give a quick overview of what can be found out there. The list is alphabetical. There will be tools that are missing, and some of the facts might be wrong--I welcome your corrections. For the purpose, I can be reached via @maxvt on Twitter, or just leave me a comment here.

There is a companion feature matrix of various tools. Comments are welcome in the same manner.

drmalex07

README

Services declared as oneshot are expected to take some action and exit immediatelly (thus, they are not really services, no running processes remain). A common pattern for these type of service is to be defined by a setup and a teardown action.

Let's create a example foo service that when started creates a file, and when stopped it deletes it.

Define setup/teardown actions

Create executable file /opt/foo/setup-foo.sh:

lusis

This uses terraform's template_file resource to generate a yaml properties file for serverspec to use.

• create the Rakefile in your terraform project root
• create a spec directory and put spec_helper.rb in it
• create the templates/properties.tmpl.yml file
• create the serverspec.tf
• terraform apply

tests

Tests will be matched based on roles defined for a given node.

franciscocpg

#!/bin/bash
# do in tmp
cd /tmp
JETTY_FILE='jetty-distribution-9.3.3.v20150827.tar.gz'
JETTY_FOLDER=${JETTY_FILE:0:-7}

# Download
wget http://download.eclipse.org/jetty/stable-9/dist/$JETTY_FILE
# Extract
sudo tar zxvf $JETTY_FILE -C /opt/

magnetikonline

Bash string manipulation cheatsheet

Assignment
Assign value to variable if variable is not already set, value is returned. Combine with a : no-op to discard/ignore return value.	${variable="value"} : ${variable="value"}

irgeek

Finding Packer-generated AMIs automatically after builds

The basic technique is to have Packer add a tag with a unique value during the build, and use AWS' built-in filtering capabilities to find that specific AMI after the build finishes.

• template.json - Shows the settings that need to be added to your template
• build.sh - Shows how to use the template to do a build and retrieve the AMI information

juliandunn

#!/usr/bin/ruby

require 'fog'
require 'json'
require 'open-uri'

module AWSAdvent
  class Demo
    attr_reader :instance, :compute, :server

ambakshi

#!/bin/bash
#
# Get all IPs from an autoscale group and update set the local ip as
# equal weight A entries (round robin dns). Takes autoscale group as
# parameter.
#
# Amit Bakshi
# 10/21/2014
#

seth-paxton

1. Download the plugin from: https://github.com/sensu/sensu-community-plugins/blob/master/handlers/remediation/sensu.rb 
2. Create the handler definition:
{                                                    
 "handlers": {                                       
   "remediator": {                                   
     "type": "pipe",                                 
     "command": "/etc/sensu/handlers/remediator.rb"  
    }                                                
  }                                                  
}