Book Image

Practical DevOps

By : joakim verona
Book Image

Practical DevOps

By: joakim verona

Overview of this book

DevOps is a practical field that focuses on delivering business value as efficiently as possible. DevOps encompasses all the flows from code through testing environments to production environments. It stresses the cooperation between different roles, and how they can work together more closely, as the roots of the word imply—Development and Operations. After a quick refresher to DevOps and continuous delivery, we quickly move on to looking at how DevOps affects architecture. You'll create a sample enterprise Java application that you’ll continue to work with through the remaining chapters. Following this, we explore various code storage and build server options. You will then learn how to perform code testing with a few tools and deploy your test successfully. Next, you will learn how to monitor code for any anomalies and make sure it’s running properly. Finally, you will discover how to handle logs and keep track of the issues that affect processes
Table of Contents (17 chapters)
Practical DevOps
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

The Puppet master and Puppet agents


Puppet is a deployment solution that is very popular in larger organizations and is one of the first systems of its kind.

Puppet consists of a client/server solution, where the client nodes check in regularly with the Puppet server to see if anything needs to be updated in the local configuration.

The Puppet server is called a Puppet master, and there is a lot of similar wordplay in the names chosen for the various Puppet components.

Puppet provides a lot of flexibility in handling the complexity of a server farm, and as such, the tool itself is pretty complex.

This is an example scenario of a dialogue between a Puppet client and a Puppet master:

  1. The Puppet client decides that it's time to check in with the Puppet master to discover any new configuration changes. This can be due to a timer or manual intervention by an operator at the client. The dialogue between the Puppet client and master is normally encrypted using SSL.

  2. The Puppet client presents its credentials...