Book Image

Cloud Foundry for Developers

By : Rahul Kumar Jain, Rick Farmer, David Wu
Book Image

Cloud Foundry for Developers

By: Rahul Kumar Jain, Rick Farmer, David Wu

Overview of this book

Cloud Foundry is the open source platform to deploy, run, and scale applications. Cloud Foundry is growing rapidly and a leading product that provides PaaS (Platform as a Service) capabilities to enterprise, government, and organizations around the globe. Giants like Dell Technologies, GE, IBM, HP and the US government are using Cloud Foundry innovate faster in a rapidly changing world. Cloud Foundry is a developer’s dream. Enabling them to create modern applications that can leverage the latest thinking, techniques and capabilities of the cloud, including: ? DevOps ? Application Virtualization ? Infrastructure agnosticism ? Orchestrated containers ? Automation ? Zero downtime upgrades ? A/B deployment ? Quickly scaling applications out or in This book takes readers on a journey where they will first learn the Cloud Foundry basics, including how to deploy and scale a simple application in seconds. Readers will build their knowledge of how to create highly scalable and resilient cloud-native applications and microservices running on Cloud Foundry. Readers will learn how to integrate their application with services provided by Cloud Foundry and with those external to Cloud Foundry. Readers will learn how to structure their Cloud Foundry environment with orgs and spaces. After that, we’ll discuss aspects of continuous integration/continuous delivery (CI/CD), monitoring and logging. Readers will also learn how to enable health checks, troubleshoot and debug applications. By the end of this book, readers will have hands-on experience in performing various deployment and scaling tasks. Additionally, they will have an understanding of what it takes to migrate and develop applications for Cloud Foundry.
Table of Contents (20 chapters)
Title Page
Credits
About the Authors
Acknowledgements
About the Reviewer
www.PacktPub.com
Customer Feedback
Dedication
Preface

Application resiliency


Every application should have some resiliency built into it. There could be number of issues that could occur in an application that's comprised of multiple microservices.

In this section, we will talk about the resiliency provided by the application. We will also discuss some known design patterns that can help us solve the issues listed in the preceding section.

Resiliency provided by Cloud Foundry

Before we talk about building resiliency into the application, let's talk about what Cloud Foundry provides out-of-the-box to make the applications resilient to Platform as a Service (PaaS) outages:

  • Cloud Foundry has a built-in mechanism to monitor applications. When an application is pushed into Cloud Foundry, then the number of instances requested during the deployment defines the desired state for an application. If the application is scaled manually, then the new number of instances override the desired state. Internal to Cloud Foundry, there are components that monitor...