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Terraform with Azure

Welcome to Terraform with Azure learning series. This repository will guide you step by step, helping you understand Terraform concepts while using the Azure provider. I will upload code samples to this repository, and contributions are welcome! Feel free to fork and create pull requests. Let's learn together!

Day 01: Introduction to Terraform Components & Installation

  • Core Components of Terraform:

    • Providers: Plugins to interact with various cloud platforms.
    • Resources: Infrastructure objects like VMs, VNETs, etc.
    • Data Sources: Information about existing resources.
    • Variables & Parameters: Input values for configuration.
    • Functions, Modules, Local Variables: Advanced features for modular and reusable code.
    • Statefile: Tracks the current state of infrastructure.

  • Task: Install Terraform on your system.

Day 02: HashiCorp Language & Azure Provider Authentication

  • Understanding the Files:

    • main.tf, variable.tf, terraform.tfvars, terraform.tfstate

  • Azure Roles:

    • Owner, Contributor, Reader

  • Authentication Methods with Azure:

    • Azure CLI (az login) - Best practice to avoid exposing credentials.
    • App Registration & Service Principal (Client ID, Client Secret, Tenant ID, Subscription ID).

  • Task: Create an Azure Resource Group and Virtual Network using the code which is in day02.

Day 03: Handling Terraform Data Sources & Imports

  • Concepts:

    • Deploy new resources.
    • Handle conflicts when manual resources are created via the Azure portal.
    • Use terraform import to bring manually created resources into Terraform's state.

  • Task: Create another subnet manually in Azure, then import it into your Terraform state.

Day 04: Azure VM Deployment

  • Resources to Create:

    1. Resource Group
    2. Virtual Network (VNET)
    3. Subnet
    4. Public IP
    5. Network Interface (NIC)
    6. Windows Virtual Machine (VM)

  • Task: Create the above infrastructure using Terraform. Understand variable.tf and terraform.tfvars files for parameterized configurations.

Day 05: Managing Multiple .tfvars Files

  • Terraform Plan with Different Variables:

    • Use multiple .tfvars files to deploy unique VMs.

  • Command:

    terraform plan -var-file="custom.tfvars"

  • Task: Deploy resources with multiple .tfvars files.

Day 06: Using Local Variables deploy ACR with default conf & AKS Deployment

  • Task: Deploy an AKS cluster

Day 07: Custom VNET for AKS

  • AKS With it's own network: we will ensure it uses a custom VNET.

  • Task: Modify your AKS configuration to use a custom subnet.

Day 08: Using Terraform modules

  • Task: Deploy identical environments using modules

Day 09: Terraform Meta-Arguments

  • Meta-Arguments:

    • depends_on: Set dependencies between resources.
    • count: Create multiple identical resources.
    • for_each: Create non-identical resources.
    • lifecycle: Customize resource management.

  • Task: Deploy 3 resource groups using the count argument.

Day 10: ForEach for Non-Identical Resources & Remote Backend

  • ForEach for Non-Identical Resources:

    • Useful for deploying non-identical resources like VMs with different configurations.
    • Helps reduce code complexity by enabling parameterized resource deployment.

  • Remote Backend with Azure Storage Account:

    • Configure remote backend with Azure Storage Account to store Terraform state files securely.
    • Enables shared state management for collaborative deployments, supporting backup, CI/CD, and robust infrastructure management.
    • Useful in multi-team environments to prevent conflicts in deployment and ensure consistency.

  • Task:

    • Deploy multiple non-identical VMs using the for_each argument.
    • Configure a remote backend in Azure for shared state storage.

Contributing

If you'd like to contribute:

  1. Fork the repo.
  2. Create your feature branch (git checkout -b feature/new-topic).
  3. Commit your changes (git commit -am 'Added a new learning day').
  4. Push to the branch (git push origin feature/new-topic).
  5. Create a new Pull Request.

Note: This repository is designed to assist professionals getting started with Azure and Terraform and also serves as a quick reference for experienced users. If you’re interested in contributing or have any questions, feel free to connect with me at [email protected]. Let's make Terraform learning easier together!