DevOps

Day 29 of DevOps learning 🚀 :
1. Terraform Basics
Why Terraform? It’s a powerful, multi-cloud IaaC tool that uses a consistent syntax across AWS, Azure, and more, making infrastructure automation efficient and repeatable.
2. CloudFormation and ARM Templates
Cloud-Specific Templates: CloudFormation is AWS-specific, and ARM templates are for Azure. Both are powerful but lack Terraform's multi-cloud flexibility.
3. Challenges Without Terraform
Manual Configurations: Without Terraform, setups are time-consuming, prone to errors, and inconsistencies.
Limited Automation: Terraform simplifies dependency management and state tracking across environments.
4. Creating AWS EC2 Instances
Automated Setup: Define the EC2 setup in .tf files, configure dependencies, and deploy with Terraform commands.
5. Steps to Deploy Infrastructure
Write configuration files → terraform init to initialize → terraform plan to preview changes → terraform apply to deploy.
6. Defining Resources
Resources: Define elements like EC2 instances, databases, etc., and Terraform will automatically handle dependencies.
7. Using Repositories
Version Control: Store Terraform files in repositories for tracking and sharing, with reusable modules for consistent setups.
8. Key Commands
terraform init, plan, apply, and destroy cover setup, preview, deployment, and teardown.
9. State Management
State File: The .tfstate file tracks infrastructure, ensuring consistency. For team use, store it remotely.
10. Backends
Remote State: Define where Terraform stores state files for safe collaboration (e.g., AWS S3, Consul).
11. Provisioners and Scripts
Provisioners: Automate configurations or tasks that Terraform alone can’t achieve.
Scripts and Modules: Embed custom scripts or use reusable modules to simplify and standardize configurations across projects.