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Terraform 基础

Definition​

Use Infrastructure as COde to provision and manage any cloud, infrastructure, or service.

Requirements​

  • An AWS account

Setup​

Terraform CLI​

VS code Editor​

Providers​

Commands​

Init project

terraform init # Init all dependencies

Deploy

terraform plan # Try running "terraform plan" to see any changes that are required for your infrastructure.

terraform apply # Apply to run codes
terraform apply --auto-approve
terraform apply --target [resource_id]
terraform apply -var-file="example.tfvars" # Specify variable from .tfvars file

terraform destroy
terraform destroy --target [resource_id]
terraform destroy -var "subnet_prefix=10.0.100.0/24" # Specify varaible from command line

Monitor

terraform state list
terraform state show [resource_id]

terraform refresh
main.tf
output "server_public_ip" {
  value = aws_eip.one.public_ip
}
output "server_private_ip" {
  value = aws_instance.web-server-instance.id
}
output "server_id" {
  value = aws_instance.web-server-instance.private_ip
}

Create Env file first then run terraform apply command

terraform.tfvars
subnet_prefix="10.0.200.0/24"
subnet_prefix_list=["10.0.2.0/24", "10.0.3.0/24"]
tags = {
    Name = "lab-terraform-from-env-file"
}

AWS Provider​

Configure AWS provider

AWS provider
provider "aws" {
  region     = "us-east-1"
  access_key = "access_key"
  secret_key = "secret_key"
}

Ubuntu 24.04: ami-04b70fa74e45c3917

EC2 resource configure
resource "aws_instance" "my-first-server" {
  ami           = "ami-04b70fa74e45c3917"
  instance_type = "t2.nano"

  tags = {
    Name = "to-delete"
  }
}

Questions​

How to apply env file ?​

.env.dev.tfvars
AWS_REGION = "us-east-1";
AWS_ACCESS_KEY = "access-key";
AWS_SECRET_KEY = "secret-key";
terraform [command] -var-file=".env.dev.tfvars" # Apply .env.dev.tfvars file

Resource​