The automation adoption process is specific to each business. There's no one size fits all when it comes to deploying automation, the ability to identify and embrace the approach that works best for your organisation is critical in advancing towards maintaining or creating a more agile environment, the focus should always be on business value and end-user experience. (We said something similar right at the start in regards to the whole of DevOps and the culture change and the automated process that this brings)
To break this down you would need to identify how the task or process that you're trying to automate is going to achieve and improve the end-user experience or business value whilst following a step-by-step systematic approach.
Having a framework or design structure that you're trying to achieve knowing what your end goal is and then working step by step towards achieving that goal measuring the automation success at various stages based on the business outcomes.
Build concepts modelled around existing applications there's no need to design the concepts around automation in a bubble because they need to be applied to your application, your service, your infrastructure, so begin to build the concepts and model them around your existing infrastructure, you're existing applications.
We should identify the tasks and perform a discovery on network change requests so that you have the most common issues and problems to automate a solution to.
Combine the policies with business-specific activities. How does implementing this policy help the business? Saves time? Saves Money? Provides better business outcome?
The good news here is that for the most part, the tools we use here for Network automation are generally the same that we will use for other areas of automation or what we have already covered so far or what we will cover in future sessions.
Operating System - As I have throughout this challenge, I am focusing on doing most of my learning with a Linux OS, those reasons were given in the Linux section but almost all of the tooling that we will touch albeit cross-OS platform maybe today they all started as Linux based applications or tools, to begin with.
Integrated Development Environment (IDE) - Again not much to say here other than throughout I would suggest Visual Studio Code as your IDE, based on the extensive plugins that are available for so many different languages.
Configuration Management - We have not got to the Configuration management section yet, but it is very clear that Ansible is a favourite in this area for managing and automating configurations. Ansible is written in Python but you do not need to know Python.
- Agentless
- Only requires SSH
- Large Support Community
- Lots of Network Modules
- Push only model
- Configured with YAML
- Open Source!
[Link to Ansible Network Modules](https://docs.ansible.com/ansible/2.9/modules/list_of_network_modules.html)
We will also touch on **Ansible Tower** in the configuration management section, see this as the GUI front end for Ansible.
CI/CD - Again we will cover more about the concepts and tooling around this but it's important to at least mention here as this spans not only networking but all provisioning of service and platform.
- GitHub, GitLab, BitBucket etc are online websites where you define your repositories and upload your code.
Language | Scripting - Something we have not covered here is Python as a language, I decided to dive into Go instead as the programming language based on my circumstances, I would say that it was a close call between Golang and Python and Python it seems to be the winner for Network Automation.
- Nornir is something to mention here, an automation framework written in Python. This seems to take the role of Ansible but specifically around Network Automation. [Nornir documentation](https://nornir.readthedocs.io/en/latest/)
Analyse APIs - Postman is a great tool for analysing RESTful APIs. Helps to build, test and modify APIs.
- POST >>> To create resources objects.
- GET >>> To retrieve a resources.
- PUT >>> To create or replace the resources.
- PATCH >>> To create or update the resources object.
Over the next 3 days, I am planning to get more hands-on around some of the things we have covered and put some work in around Python and Network automation.
We have nowhere near covered all of the networking topics so far but wanted to make this broad enough to follow along and still keep learning from the resources I am adding below.
