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Topic 3: Infrastructure as Code (IaC)

Infrastructure as Code (IaC) is a key DevOps practice that allows you to manage and provision infrastructure using code, rather than manual processes, like using console. It ensures consistency, repeatability, and scalability in managing cloud resources.

Study​

Hands-on Tasks​

Basic IaC Project​

  1. Install Terraform on your system:
  2. Write a Terraform configuration file to:
    • Create a virtual machine in your preferred cloud platform.
    • Configure a security group to allow SSH access.
    • Or deploy a static site to your choice of cloud provider.
  3. Learn how you can deploy it using Terraform:
    • Run terraform init to set up the working directory.
    • Run terraform plan to preview changes.
    • Run terraform apply to create the resources.
  4. Verify the resources in your cloud platform.
  5. Destroy the resources:
    • Run terraform destroy to clean up.

Additional Project​

  • Use Terraform to deploy a multi-tier application:
    • Create a VPC with public and private subnets.
    • Deploy a web server in the public subnet and a database in the private subnet.
    • Configure security groups to allow communication between the web server and database.
    • Configure variables withing your terraform configuration.
    • Use a backend for the state file management.

Test Your Knowledge​

Use an AI assistant to test your understanding of IaC concepts. Here are some example prompts:

  1. What are the benefits of using Infrastructure as Code?
  2. How does Terraform ensure idempotency in resource management?
  3. What is the purpose of the terraform state file?
  4. How do you manage sensitive data like API keys in Terraform?
  5. What is the difference between terraform plan and terraform apply?
  6. What are terraform modules and why/how you should use them?
  7. What are the best practices for terraform?

Resources​