Managing Cloud Resources with Terraform

Why IaC

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Clicking through consoles is hard to reuse and audit. Infrastructure as code (IaC) describes resources in code, making changes reviewable and reversible.

Terraform core concepts

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• Configuration: *.tf files declare the desired state
• State: maps real resources to the configuration
• Provider: plugins for cloud vendors (AWS, Alibaba Cloud, etc.)
• Plan / Apply: preview changes, then execute

Example

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resource "aws_instance" "web" {
  ami           = "ami-0c55b159cbfafe1f0"
  instance_type = "t3.micro"
}

Best practices

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• Keep state in a remote backend (S3 + locking) to avoid conflicts
• Use modules to reuse common resource patterns
• Handle secrets via variables and encrypted storage

Summary

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Terraform makes cloud management as rigorous as writing code — declarative, auditable, reversible. It’s the bedrock of modern ops.