Book Image

Learning Ansible 2 - Second Edition

Book Image

Learning Ansible 2 - Second Edition

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 (16 chapters)
Learning Ansible 2 Second Edition
Credits
About the Author
About the Reviewer
www.PacktPub.com
Preface

Nagios


Nagios is one of the most used tools for controlling the status of services and servers. Nagios is capable of regularly auditing the state of servers and services, and notifying users in case of problems. If you have Nagios in your environment, you need to be very careful when you administer your machines, because in cases where Nagios finds servers or services in an unhealthy state, it will start sending e-mails, SMS messages, and calls to your whole team. When you run Ansible scripts against nodes that are controlled by Nagios you have to be even more careful, because you risk e-mails, SMS messages, and calls being triggered during the night or other inappropriate times. To avoid this, Ansible is able to notify Nagios beforehand, so that Nagios does not send notifications in that time window even if some services are down (for instance, because they are rebooted) or other checks fail.

In this example, we are going to stop a service, wait for 5 minutes, then start it again since this...