README.md

Best Practice for using Terraform to Create AWS Infrastructure

Create resources about VPC, Subnets, Internet Gateway, Network ACLs, Route Tables and Instances (Bastion Server and NAT Server)

• Region: ap-northeast-1 (Tokyo)
• VPC: my-vpc
• Public subnets: associated route table directs the subnet's traffic to the Amazon VPC's IGW.
  • Public: my-public-ap-northeast-1 with zones a, c and d
  • NAT Server: my-nat-server with zone c
• Private subnets: associated route table directs the subnet's traffic to the NAT Server.
  • Application: my-application-ap-northeast-1 with zones a, c and d
  • Intra: my-intra-ap-northeast-1 with zones a, c and d
  • Persistence: my-persistence-ap-northeast-1 with zones a, c and d
• Internet Gateway: my-igw
• Route Tables:
  • Public: my_public_rtb directs the subnet's traffic to the Amazon VPC's IGW.
  • NAT Server: my_nat_server_rtb directs the subnet's traffic to the Amazon VPC's IGW.
  • Applicaion: my_application_rtb directs the subnet's traffic to the NAT Server.
  • Intra: my_intra_rtb directs the subnet's traffic to the NAT Server.
  • Persistence: my_persistence_rtb directs the subnet's traffic to the NAT Server.
• Instances:
  • Bastion Server: my_bastion_instance with my-public-ap-northeast-1a subnet
  • NAT Server with my_nat_server_instance with my_nat_serversubnet

Create all resources and review all changes

• Run the following commands:

cd terraform-aws-infra
terraform plan -out .plan --var-file example.tfvars -lock=true -refresh=true

Apply all changes

• Run the following commands:

terraform apply ".plan"

Destroy all changes

• Run the following commands:

terraform destroy --var-file example.tfvars