Book Image

Hybrid Cloud for Developers

By : Manoj Hirway
Book Image

Hybrid Cloud for Developers

By: Manoj Hirway

Overview of this book

This book introduces you to the hybrid cloud platform, and focuses on the AWS public cloud and OpenStack private cloud platforms. It provides a deep dive into the AWS and OpenStack cloud platform services that are essential for developing hybrid cloud applications. You will learn to develop applications on AWS and OpenStack platforms with ease by leveraging various cloud services and taking advantage of PaaS. The book provides you with the ability to leverage the ?exibility of choosing a cloud platform for migrating your existing resources to the cloud, as well as developing hybrid cloud applications that can migrate virtual machine instances from AWS to OpenStack and vice versa. You will also be able to build and test cloud applications without worrying about the system that your development environment supports. The book also provides an in-depth understanding of the best practices that are followed across the industry for developing cloud applications, as well as for adapting the hybrid cloud platform. Lastly, it also sheds light on various troubleshooting techniques for OpenStack and AWS cloud platform services that are consumed by hybrid cloud applications. By the end of this book, you will have a deep understanding of the hybrid cloud platform and will be able to develop robust, efficient, modular, scalable, and ?exible cloud applications.
Table of Contents (16 chapters)
Title Page
Dedication
Packt Upsell
Contributors
Preface
Index

Writing your first OpenStack application


Let's begin by writing a simple application that lists the available VMs running on your OpenStack Compute service node.

We first need to import the OpenStack library into our application program. We will import the Connection class into our program to demonstrate how we can use it. The application program must establish a connection to the OpenStack cloud. This is achieved by creating an object of the connection class and passing the security information and credentials to the constructor of this class. We must pass the following information to the constructor:

  • auth_url: The keystone authentication URL. This is the URL of your OpenStack keystone service. It is usually set to the IP address or domain name of your OpenStack Keystone node and it is appended with /identity.
  • project_name:  This is the name of the project that you want your program to operate in.
  • username: The name of the user who will be logging into OpenStack via the application program...