Development Operations, or DevOps, is the term to describe the practice of allowing the development team to be responsible for its own operations.
In the past, developers would create artifacts and "throw it over the fence" to operations. Not any more. The development team contains all the skills to create and deploy code to production.
It is common to place a mix of tests in your projects. Some run fast, some slow and others are more integration testing than unit testing. This can cause problems in DevOps practices when you need to compile a project with a simple change and don't want to wait 15 minutes for all the tests to run. This is not an example of fast feedback. Here is how you call a Maven build process in a way to run just the tests you want.
Using Terraform and Ansible together is a great way to provision both infrastructure and computing resources. Managing variables in both tools can become unwieldy. Here is how to simplify variable management between the two tools.
Call Ansible with an IP address or hostname as the inventory (-i) argument.
Ansible is an open source operations automation platform which is very simple to setup and use. It makes performing repetitive tasks on multiple computing resources far simpler and more consistent. Getting started with Ansible is simple and uncomplicated. Here is one way to start learning Ansible.