Book Image

Infrastructure as Code (IAC) Cookbook

By : Stephane Jourdan, Pierre Pomès
Book Image

Infrastructure as Code (IAC) Cookbook

By: Stephane Jourdan, Pierre Pomès

Overview of this book

Para 1: Infrastructure as code is transforming the way we solve infrastructural challenges. This book will show you how to make managing servers in the cloud faster, easier and more effective than ever before. With over 90 practical recipes for success, make the very most out of IAC.
Table of Contents (18 chapters)
Infrastructure as Code (IAC) Cookbook
Credits
About the Authors
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface
Index

Handling files using cloud-init


An early need we all face is to have a file, a license, or a script in place right from the beginning of the instance life. Cloud-init proposes different ways of sending those files over the new instance. We'll see how to send files using plain text and base64 data encodings.

Getting ready

To step through this recipe, you will need:

  • Access to a cloud-config enabled infrastructure

How to do it…

The first file we'll write is a MOTD (short for Message Of The Day) with root read-write permissions, read-only for everyone else. This file will have its content declared right from the cloud-config file:

#cloud-config
write_files:
  - path: /etc/motd
    content: |
      This server is configured using cloud-init.
      Welcome.
    owner: root:root
    permissions: '0644'

This machine, when booted, will have /etc/motd in place and display the string at login:

$ ssh ubuntu@server_ip
Welcome to Ubuntu 16.04.1 LTS (GNU/Linux 4.4.0-36-generic x86_64)
[...]
This server is configured...