Course on Youtube

1. Evolution of Cloud + Infrastructure as Code (IaC)
2. Terraform Overview + Setup
3. Basic Terraform Usage
4. Variables and Outputs
5. Language Features
6. Project Organization + Modules
7. Managing Multiple Environments
8. Testing Terraform Code
9. Developer Workflows

Terraform is a tool for building, changing, and versioning infrastructure safely and efficiently.

- According to HashiCorp

• Basic web application
• Infrastructure all within AWS
• Multiple instance running on EC2
• Using default VPC for simplicity

flowchart TD
  A[Amazon Route 53] --> B[Elastic Load Balancing]
  B --> Compute
  subgraph Compute
    C[Amazon EC2]
    D[Amazon EC2]
  end
  subgraph Database
    F[(Amazon RDS)]
  end
  Compute --- S
  subgraph S[Amazon S3]
    G[(Bucket)]
  end
  Compute --- Database

• Operational Overhead가 매우 Challanging했다.
• Capital Expenses를 운영자가 각각 부담해야 했다.
• On Promise -> Cloud (On Demand)

• Infrastructure provisioned via APIs.
• Servers created & destroyed in seconds.
• Long-lived + mutable -> Short-lived + immutable

• GUI (AWS Consoles, ...)
• API/CLI (AWS CLI, ...)
• IaC (Terraform, Serverless, ...)

코드 베이스로 인프라 프로비저닝이 가능함에 따라 일관된 설정과 구성을 명시적으로 나타내고 관리할 수 있다.

1. Ad hoc scripts
2. Configuration management tools
3. Server Templating tools
4. Orchestration tools (e.g. Kubernetes)
5. Provisioning tools

• Declarative(선언형) vs. Imperative(명령형)

• Cloud Formation
• Azure Resource Manager
• Google Cloud Deployment Manager

• Terraform
• Pulumi
• Serverless

1: From Terraform: Up & Running Writing Infrastructure as Code, Second Edition (O'Reilly Media, 2019) by Yevgeniy Brickman