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  • Book Overview & Buying Learning Ansible 2
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Learning Ansible 2

Learning Ansible 2 - Second Edition

By : Fabio Alessandro Locati
2 (1)
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Learning Ansible 2

Learning Ansible 2

2 (1)
By: Fabio Alessandro Locati

Overview of this book

Ansible is an open source automation platform that assists organizations with tasks such as configuration management, application deployment, orchestration, and task automation. With Ansible, even complex tasks can be handled easier than before. In this book, you will learn about the fundamentals and practical aspects of Ansible 2 by diving deeply into topics such as installation (Linux, BSD, and Windows Support), playbooks, modules, various testing strategies, provisioning, deployment, and orchestration. In this book, you will get accustomed with the new features of Ansible 2 such as cleaner architecture, task blocks, playbook parsing, new execution strategy plugins, and modules. You will also learn how to integrate Ansible with cloud platforms such as AWS. The book ends with the enterprise versions of Ansible, Ansible Tower and Ansible Galaxy, where you will learn to interact Ansible with different OSes to speed up your work to previously unseen levels By the end of the book, you’ll able to leverage the Ansible parameters to create expeditious tasks for your organization by implementing the Ansible 2 techniques and paradigms.
Table of Contents (11 chapters)
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Optimizations

Sometimes, Ansible feels slow, mainly if you have a very long list of tasks to execute and/or if you have huge amount of machines. This feeling is actually more than just a feeling. There are multiple reasons for this, and ways to avoid it, we are going to look at three of those.

Pipelining

One of the reason why Ansible is slow by default is that for every module execution and for every host, Ansible will perform the following actions:

  • SSH handshake
  • Execute the task
  • Close the SSH connection

As you can see, this means that if you have 10 tasks to be executed on a single remote server, Ansible will open (and close) the connection 10 times. Since the SSH protocol is an encrypted protocol, this makes the SSH handshake an even longer process, since the two parts have to negotiate the ciphers every single time.

Ansible allows us to reduce the execution time drastically by initiating the connections at the beginning of the playbook and keeping them alive for the whole execution so that...

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Learning Ansible 2
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