Installing and Configuring Terraform CLI

1. Installing Terraform

curl -O https://releases.hashicorp.com/terraform/1.9.5/terraform_1.9.5_linux_amd64.zip
unzip terraform_1.9.5_linux_amd64.zip
sudo mv terraform /usr/local/bin/
terraform version

2. Verifying Installation

$ terraform version
Terraform v1.9.5
on darwin_arm64

3. Enabling Tab Completion

Terraform supports tab completion for the CLI in Bash and Zsh shells, enhancing productivity by auto-completing commands, flags, and resource names.

terraform -install-autocomplete
source ~/.bash_completion

terraform -install-autocomplete
source ~/.zshrc

4. Configuring CLI Settings

export TERRAFORM_CONFIG=/home/user/my-terraform-config

plugin_cache = false

5. Setting Up Credentials

Terraform uses various providers to interact with cloud services and external systems. Each provider requires appropriate credentials to authenticate and authorize operations.

provider "aws" {
  region = "us-west-2"
  access_key = "AKIAIOSFODNN7EXAMPLE"
  secret_key = "wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY"
}

6. Configuring Plugin Cache

Terraform uses a plugin cache to store downloaded provider plugins locally. By default, Terraform stores these in the ~/.terraform.d/plugins directory.

plugin_cache_dir = "~/.terraform.d/plugins"

7. Setting Environment Variables

export TF_LOG=DEBUG
terraform plan

8. Using Terraform Wrapper Tools

Terraform wrapper tools help manage versions, plugins, and configurations more efficiently. These tools simplify installation, version control, and environment setup.

tfenv install 1.9.5
tfenv use 1.9.5
terraform version

tfswitch 1.9.5
terraform version

9. Configuring Credential Helpers

Terraform supports credential helpers to securely manage authentication with cloud providers and other services. These helpers can store and retrieve credentials without exposing them in plain text.

aws configure

provider "aws" {
  region = "us-west-2"
}

10. Setting Provider Installation Methods

terraform {
  required_providers {
    aws = {
      source  = "hashicorp/aws"
      version = "~> 5.0"
    }
  }
}

provider "aws" {
  region = "us-west-2"
}