By Daniel Hall
Leverage the facility of Ansible to regulate your infrastructure efficiently
About This Book
- Configure Ansible in your Linux and home windows machines effectively
- Extend Ansible so as to add beneficial properties similar to looping, conditional executions, and activity delegations
- Explore the features of Ansible from uncomplicated to extra complicated issues with the aid of this step by step guide
Who This booklet Is For
This publication is meant for an individual who desires to research Ansible ranging from the fundamentals. a few event of the way to establish and configure Linux machines and a operating wisdom of BIND, MySQL, and different Linux daemons is expected.
What you'll Learn
- Manage your home windows machines with Ansible
- Use Ansible's command-line instruments to interrogate systems
- Interact with modules and installation cloud infrastructures
- Process facts within Ansible and expand the performance of Ansible
- Learn how you can shop secrets and techniques in Ansible's vault and detect different resource code administration techniques
- Build maintainable configurations for giant environments
- Write customized Ansible plugins efficiently
- Extend the performance of Ansible by way of writing your personal modules
Ansible is an open resource software program platform for configuring and dealing with desktops. It offers a transparent and concise strategy to deal with the configuration of your Linux infrastructure. This e-book is a step by step advisor that offers you with the data you require to successfully deal with your structures in an easy, speedy, and maintainable means, with real-world examples.
You will commence by way of studying the fundamentals of Ansible after which circulate directly to exploring extra complex subject matters. you'll then examine the elemental and complicated operations of playbooks and have interaction with modules to regulate home windows machines and install them. additionally, you will get conversant in Ansible's extra complex positive factors comparable to serially updating machines, delegating initiatives to different machines, complicated makes use of of variables, looping and stipulations, copying entire directories, and utilizing filters to technique variables. in the direction of the top of the publication, you are going to the best way to elevate the performance of Ansible itself via writing your personal modules and plugins.
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Extra info for Ansible Configuration Management
To get this template to set up an authoritative nameserver, we need to create a group in our inventory file named authorativenames and add some hosts under it. How to do this was discussed back in Chapter 1, Getting Started with Ansible. [ 27 ] Simple Playbooks We can simply call the templates module and the facts from the machines will be sent through, including the groups the machine is in. This is as simple as calling any other module. The template module also accepts similar arguments to the copy module such as owner, group, and mode.
The add_host module The add_host module is one of the most powerful modules that are available in playbooks. add_host lets us dynamically add new machines inside a play. We can do this using the uri module to get a host from our Configuration Management Database (CMDB) and then adding it to the current play. This module will also add our host to a group, dynamically creating that group if it does not already exist. The module simply takes a name and a groups argument, which are rather self-explanatory, and sets the hostname and groups.
Instead of adding when clauses to each task that needs to be skipped, we can create a group for machines where the action should happen and then use a separate play to configure those machines separately. pem The slurp module The slurp module grabs a file from the remote system, encodes it with base 64, and then returns the result. We can utilize the register keyword in order to place the contents into a fact. When using the slurp module to fetch files, we should be wary of the file size. This module loads the entire file into memory, so using slurp with large files can consume all available RAM and cause our system to crash.
Ansible Configuration Management by Daniel Hall