Book Image

Practical Ansible 2

By : Daniel Oh, James Freeman, Fabio Alessandro Locati
Book Image

Practical Ansible 2

By: Daniel Oh, James Freeman, Fabio Alessandro Locati

Overview of this book

Ansible enables you to automate software provisioning, configuration management, and application roll-outs, and can be used as a deployment and orchestration tool. While Ansible provides simple yet powerful features to automate multi-layer environments using agentless communication, it can also solve other critical IT challenges, such as ensuring continuous integration and continuous deployment (CI/CD) with zero downtime. In this book, you'll work with Ansible 2.9 and learn to solve complex issues quickly with the help of task-oriented scenarios. You'll start by installing and configuring Ansible on Linux and macOS to automate monotonous and repetitive IT tasks and get to grips with concepts such as playbooks, inventories, and network modules. As you progress, you'll gain insight into the YAML syntax and learn how to port between Ansible versions. In addition to this, you'll also understand how Ansible enables you to orchestrate multi-layer environments such as networks, containers, and the cloud. By the end of this Ansible book, you'll be well - versed in writing playbooks and other related Ansible code to overcome just about all of your IT challenges, from infrastructure-as-code provisioning to application deployments, and even handling the mundane day-to-day maintenance tasks that take up so much valuable time.
Table of Contents (18 chapters)
1
Section 1: Learning the Fundamentals of Ansible
6
Section 2: Expanding the Capabilities of Ansible
11
Section 3: Using Ansible in an Enterprise

Configuring playbook prompts

So far, all of our playbooks have had their data specified for them at run time in variables we defined within the playbook. However, what if you actually want to obtain information from someone during a playbook run? Perhaps you want a user to select a version of a package to install? Or, perhaps you want to obtain a password from a user for an authentication task without storing it anywhere. (Although Ansible Value can encrypt the data at rest, some companies may forbid the storing of passwords and other such credentials in tools that they have not evaluated.) Fortunately for these instances (and many more), Ansible can prompt you for user input and store the input in a variable for future processing.

Let's reuse the two host frontend inventories we defined at the beginning of this chapter. Now, let's demonstrate how to capture data from...