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

Managing exceptions


There are many cases, where for one reason or another, you want your playbook and roles to carry on in the case one or more tasks fail. A typical example of this could be that you want to check if software is installed or not. Let's see the following example to install Java. In the roles/java/tasks/main.ymal file, we are going to put the following code:

    - name: Verify if the current version of Java is installed 
      command: rpm -q jdk1.8.0_91-1.8.0_91-fcs 
      register: java 
      ignore_errors: True 
      changed_when: java|failed 
 
    - name: Ensure that JavaSE is download 
      uri: 
        url: 'http://download.oracle.com/otn-pub/java/jdk/8u91-b14/jdk-8u91-linux-x64.rpm' 
        method: GET 
        HEADER_Cookie: 'gpw_e24=http%3A%2F%2Fwww.oracle.com%2F; oraclelicense=accept-securebackup-cookie' 
        dest: /tmp 
        creates: /tmp/jdk-8u91-linux-x64.rpm 
      when: java|failed...