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Ansible is a remarkably straightforward IT automation technology. Configuration management, application deployment, cloud provisioning, ad-hoc task execution, network automation, and multi-node orchestration are all handled by this software. Complex modifications, such as zero-downtime rolling updates with load balancers, are simple using Ansible. The following are ansible's design principles:

• Have a quick and easy setup process with a low learning curve
• Manage machines in parallel.
• Instead of using bespoke agents and additional open ports, use the current SSH daemon.
• Use a vocabulary that is both machine and human-friendly when describing infrastructure.
• Emphasis on content security and ease of audibility, review, and rewriting.
• Instantly manage new distant machines without having to install any software.
• Any dynamic language, not just Python, can be used to create modules.
• Be able to be used by non-root users.
• Objectives to be the most user-friendly IT automation system ever.

How Ansible Works?

There are two types of computers in Ansible: control nodes and managed nodes. A control node is an Ansible-running machine. There must be at least one control node, with the option of a backup control node. Any device that is handled by the control node is referred to as a managed node. Ansible connects to network nodes (clients, servers, or whatever you're configuring) and then sends a little program known as an Ansible module to that node. Ansible runs these modules through SSH and then deletes them after they're done. Only your Ansible control node needs login access to the managed nodes for this interaction to work. SSH keys are the most frequent method of authentication, however alternative methods are also allowed.

The phrase Ansible modules seem complicated, however, Ansible handles the majority of the complexity, not the user. An Ansible module is a model of a system's desired state, which means that each module defines what should be true on each given managed node. For example, if a systems administrator decides that LibreOffice version X.Z should be installed on all workstations in a company, Ansible's packaging module will verify whether each node has LibreOffice X.Z loaded. If Ansible discovers a managed node running LibreOffice X.Y, it determines the operating system and performs the necessary updates to LibreOffice X.Z. In this approach, the software maintained by the IT department can be updated overnight on every workstation in a business. However, infrastructure maintenance entails more than merely monitoring software versions. When people say they're using Ansible, they're talking about Ansible modules, which are the pieces of Ansible that do specific tasks. If you need to automate something across several machines, check through the Ansible modules to locate one that does the job, and then install Ansible so you can configure and run that module. You can also develop your custom modules to handle specialized tasks if you are a programmer. If your module is valuable in general, you can submit it to the Ansible project for inclusion so that others can benefit from your efforts.

Crossvale is an IT consultancy firm that provides services such as RedHat OpenShift deployment, Ansible automation (crossvale.com/Ansible-automation), Ansible tower installation, application, lift and shift migration, microservices development, OpenStack private cloud, CICD DevOps, and DevSecOps pipeline implementation, and support to small, medium, and large global businesses. To know more, visit https://crossvale.com/our-story/.

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