Terraform is an infra management tool made by Hashicorp. It helps in provision, managing and maintaining cloud resources. Terraform is not a config management tool.

Features

• Terraform deploys pre-made server images.
• Base server images can be created with Packer, another open-source tool by Hashicorp.
• Immutable infrastructure
• Disposable infrastructure - freely delete and replace any instance
• It can work with Docker and Kubernetes. It can also interact with AWS EKS.
• Terraform figures out the hard part of resource ordering and lets you treat the infrastructure as static code.

Housekeeping

• GitHub : https://github.com/soumendrak/learning-terraform-3087701

Internal working

• Terraform uses DAG(Directed Acyclic Graphs)
  
• Where the each node represents a service and the nodes are not cyclic or interdependent with each other.
  

Complete Terraform Course - From BEGINNER to PRO! (Learn Infrastructure as Code)

source: https://www.youtube.com/watch?v=7xngnjfIlK4

Introduction

There are three approaches to provisioning cloud resources:

1. GUI
2. API/CLI
3. IaC

Categories of IaC:

1. Ad Hoc scripts
2. Config management tools like Ansible
3. Server templating tools
4. Orchestration tools like k8s
5. Provisioning tools
   Two types of tools:
6. Declarative tools like SQL
7. Imperative
   • Here, you specify a sequence of instructions.
     Terraform and Pulumi are Cloud agnostic tools.

Terraform overview and setup

• Terraform is a tool for safely building, changing, and versioning infrastructure.
• Enables application software best practices for infrastructure
• Compatible with many clouds and services
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Source

• https://www.linkedin.com/learning/learning-terraform-15575129/learn-terraform-for-your-cloud-infrastructure

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