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‎.gitignore

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/ADDITIONAL-TOPICS
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FUTURE-TOPICS
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#.gitignore
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# macOS Files
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.DS_Store
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# Ignore .sh files
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#*.sh
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# Terraform Files and Folders
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.terraform
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*.tfstate
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*.tfstate.backup
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#.terraform.lock.hcl
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#*.tfvars
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# Ignore .pem files
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#*.pem

‎01-Infrastructure-as-Code-IaC-Basics/README.md

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# Infrastructure as Code Basics
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## Step-01: Understand Problems with Traditional way of Managing Infrastructure
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- Time it takes for building multiple environments
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- Issues we face with different environments
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- Scale-Up and Scale-Down On-Demand
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## Step-02: Discuss how IaC with Terraform Solves them
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- Visibility
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- Stability
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- Scalability
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- Security
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- Audit

‎02-Terraform-Basics/02-01-Install-Tools-TerraformCLI-AWSCLI-VSCodeIDE/README.md

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# Terraform & AWS CLI Installation
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## Step-01: Introduction
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- Install Terraform CLI
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- Install AWS CLI
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- Install VS Code Editor
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- Install HashiCorp Terraform plugin for VS Code
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## Step-02: MACOS: Terraform Install
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- [Download Terraform MAC](https://www.terraform.io/downloads.html)
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- [Install CLI](https://learn.hashicorp.com/tutorials/terraform/install-cli)
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- Unzip the package
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```
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# Copy binary zip file to a folder
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mkdir /Users/<YOUR-USER>/Documents/terraform-install
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COPY Package to "terraform-install" folder
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# Unzip
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unzip <PACKAGE-NAME>
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unzip terraform_0.14.3_darwin_amd64.zip
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# Copy terraform binary to /usr/local/bin
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echo $PATH
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mv terraform /usr/local/bin
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# Verify Version
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terraform version
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# To Uninstall Terraform (NOT REQUIRED)
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rm -rf /usr/local/bin/terraform
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```
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## Step-03: MACOS: IDE for Terraform - VS Code Editor
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- [Microsoft Visual Studio Code Editor](https://code.visualstudio.com/download)
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- [Hashicorp Terraform Plugin for VS Code](https://marketplace.visualstudio.com/items?itemName=HashiCorp.terraform)
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### Step-04: MACOS: Install AWS CLI
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- [AWS CLI Install](https://docs.aws.amazon.com/cli/latest/userguide/cli-chap-install.html)
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- [Install AWS CLI - MAC](https://docs.aws.amazon.com/cli/latest/userguide/install-cliv2-mac.html#cliv2-mac-install-cmd)
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```
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# Install AWS CLI V2
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curl "https://awscli.amazonaws.com/AWSCLIV2.pkg" -o "AWSCLIV2.pkg"
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sudo installer -pkg AWSCLIV2.pkg -target /
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which aws
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aws --version
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# Uninstall AWS CLI V2 (NOT REQUIRED)
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which aws
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ls -l /usr/local/bin/aws
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sudo rm /usr/local/bin/aws
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sudo rm /usr/local/bin/aws_completer
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sudo rm -rf /usr/local/aws-cli
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```
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## Step-05: MACOS: Configure AWS Credentials
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- **Pre-requisite:** Should have AWS Account.
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- [Create an AWS Account](https://portal.aws.amazon.com/billing/signup?nc2=h_ct&src=header_signup&redirect_url=https%3A%2F%2Faws.amazon.com%2Fregistration-confirmation#/start)
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- Generate Security Credentials using AWS Management Console
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- Go to Services -> IAM -> Users -> "Your-Admin-User" -> Security Credentials -> Create Access Key
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- Configure AWS credentials using SSH Terminal on your local desktop
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```
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# Configure AWS Credentials in command line
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$ aws configure
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AWS Access Key ID [None]: AKIASUF7DEFKSIAWMZ7K
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AWS Secret Access Key [None]: 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
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Default region name [None]: us-east-1
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Default output format [None]: json
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# Verify if we are able list S3 buckets
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aws s3 ls
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```
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- Verify the AWS Credentials Profile
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```
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cat $HOME/.aws/credentials
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```
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## Step-06: WindowsOS: Terraform & AWS CLI Install
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- [Download Terraform](https://www.terraform.io/downloads.html)
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- [Install CLI](https://learn.hashicorp.com/tutorials/terraform/install-cli)
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- Unzip the package
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- Create new folder `terraform-bins`
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- Copy the `terraform.exe` to a `terraform-bins`
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- Set PATH in windows
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- Install [AWS CLI](https://docs.aws.amazon.com/cli/latest/userguide/cli-chap-install.html)
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## Step-07: LinuxOS: Terraform & AWS CLI Install
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- [Download Terraform](https://www.terraform.io/downloads.html)
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- [Linux OS - Terraform Install](https://learn.hashicorp.com/tutorials/terraform/install-cli)

‎02-Terraform-Basics/02-02-Terraform-Command-Basics/README.md

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# Terraform Command Basics
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## Step-01: Introduction
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- Understand basic Terraform Commands
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- terraform init
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- terraform validate
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- terraform plan
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- terraform apply
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- terraform destroy
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## Step-02: Review terraform manifest for EC2 Instance
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- **Pre-Conditions-1:** Ensure you have **default-vpc** in that respective region
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- **Pre-Conditions-2:** Ensure AMI you are provisioning exists in that region if not update AMI ID
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- **Pre-Conditions-3:** Verify your AWS Credentials in **$HOME/.aws/credentials**
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```t
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# Terraform Settings Block
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terraform {
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required_providers {
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aws = {
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source = "hashicorp/aws"
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#version = "~> 3.21" # Optional but recommended in production
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}
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}
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}
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# Provider Block
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provider "aws" {
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profile = "default" # AWS Credentials Profile configured on your local desktop terminal $HOME/.aws/credentials
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region = "us-east-1"
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}
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# Resource Block
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resource "aws_instance" "ec2demo" {
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ami = "ami-04d29b6f966df1537" # Amazon Linux in us-east-1, update as per your region
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instance_type = "t2.micro"
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}
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```
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## Step-03: Terraform Core Commands
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```t
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# Initialize Terraform
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terraform init
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# Terraform Validate
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terraform validate
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# Terraform Plan to Verify what it is going to create / update / destroy
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terraform plan
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# Terraform Apply to Create EC2 Instance
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terraform apply
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```
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## Step-04: Verify the EC2 Instance in AWS Management Console
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- Go to AWS Management Console -> Services -> EC2
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- Verify newly created EC2 instance
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## Step-05: Destroy Infrastructure
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```t
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# Destroy EC2 Instance
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terraform destroy
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# Delete Terraform files
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rm -rf .terraform*
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rm -rf terraform.tfstate*
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```
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## Step-08: Conclusion
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- Re-iterate what we have learned in this section
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- Learned about Important Terraform Commands
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- terraform init
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- terraform validate
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- terraform plan
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- terraform apply
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- terraform destroy
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‎02-Terraform-Basics/02-02-Terraform-Command-Basics/terraform-manifests/ec2-instance.tf

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# Terraform Settings Block
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terraform {
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required_providers {
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aws = {
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source = "hashicorp/aws"
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#version = "~> 3.21" # Optional but recommended in production
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}
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}
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}
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# Provider Block
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provider "aws" {
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profile = "default" # AWS Credentials Profile configured on your local desktop terminal $HOME/.aws/credentials
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region = "us-east-1"
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}
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# Resource Block
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resource "aws_instance" "ec2demo" {
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ami = "ami-0533f2ba8a1995cf9" # Amazon Linux in us-east-1, update as per your region
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instance_type = "t2.micro"
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}

‎02-Terraform-Basics/02-03-Terraform-Language-Syntax/README.md

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# Terraform Configuration Language Syntax
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## Step-01: Introduction
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- Understand Terraform Language Basics
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- Understand Blocks
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- Understand Arguments, Attributes & Meta-Arguments
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- Understand Identifiers
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- Understand Comments
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## Step-02: Terraform Configuration Language Syntax
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- Understand Blocks
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- Understand Arguments
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- Understand Identifiers
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- Understand Comments
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- [Terraform Configuration](https://www.terraform.io/docs/configuration/index.html)
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- [Terraform Configuration Syntax](https://www.terraform.io/docs/configuration/syntax.html)
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```t
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# Template
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<BLOCK TYPE> "<BLOCK LABEL>" "<BLOCK LABEL>" {
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# Block body
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<IDENTIFIER> = <EXPRESSION> # Argument
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}
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# AWS Example
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resource "aws_instance" "ec2demo" { # BLOCK
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ami = "ami-04d29b6f966df1537" # Argument
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instance_type = var.instance_type # Argument with value as expression (Variable value replaced from varibales.tf
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}
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```
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## Step-03: Understand about Arguments, Attributes and Meta-Arguments.
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- Arguments can be `required` or `optional`
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- Attribues format looks like `resource_type.resource_name.attribute_name`
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- Meta-Arguments change a resource type's behavior (Example: count, for_each)
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- [Additional Reference](https://learn.hashicorp.com/tutorials/terraform/resource?in=terraform/configuration-language)
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- [Resource: AWS Instance](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/instance)
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- [Resource: AWS Instance Argument Reference](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/instance#argument-reference)
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- [Resource: AWS Instance Attribute Reference](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/instance#attributes-reference)
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- [Resource: Meta-Arguments](https://www.terraform.io/docs/language/meta-arguments/depends_on.html)
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## Step-04: Understand about Terraform Top-Level Blocks
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- Discuss about Terraform Top-Level blocks
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- Terraform Settings Block
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- Provider Block
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- Resource Block
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- Input Variables Block
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- Output Values Block
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- Local Values Block
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- Data Sources Block
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- Modules Block
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‎02-Terraform-Basics/02-03-Terraform-Language-Syntax/terraform-manifests/top-level-blocks-samples.tf

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#####################################################################
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# Block-1: Terraform Settings Block
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terraform {
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required_version = "~> 0.14"
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required_providers {
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aws = {
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source = "hashicorp/aws"
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version = "~> 3.0"
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}
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}
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# Adding Backend as S3 for Remote State Storage with State Locking
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backend "s3" {
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bucket = "terraform-stacksimplify"
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key = "dev2/terraform.tfstate"
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region = "us-east-1"
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# For State Locking
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dynamodb_table = "terraform-dev-state-table"
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}
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}
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#####################################################################
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# Block-2: Provider Block
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provider "aws" {
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profile = "default" # AWS Credentials Profile configured on your local desktop terminal $HOME/.aws/credentials
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region = "us-east-1"
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}
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#####################################################################
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# Block-3: Resource Block
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resource "aws_instance" "ec2demo" {
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ami = "ami-04d29b6f966df1537" # Amazon Linux
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instance_type = var.instance_type
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}
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#####################################################################
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# Block-4: Input Variables Block
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variable "instance_type" {
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default = "t2.micro"
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description = "EC2 Instance Type"
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type = string
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}
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#####################################################################
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# Block-5: Output Values Block
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output "ec2_instance_publicip" {
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description = "EC2 Instance Public IP"
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value = aws_instance.my-ec2-vm.public_ip
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}
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#####################################################################
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# Block-6: Local Values Block
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# Create S3 Bucket - with Input Variables & Local Values
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locals {
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bucket-name-prefix = "${var.app_name}-${var.environment_name}"
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}
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#####################################################################
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# Block-7: Data sources Block
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# Get latest AMI ID for Amazon Linux2 OS
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data "aws_ami" "amzlinux" {
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most_recent = true
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owners = ["amazon"]
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filter {
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name = "name"
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values = ["amzn2-ami-hvm-*"]
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}
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filter {
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name = "root-device-type"
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values = ["ebs"]
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}
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filter {
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name = "virtualization-type"
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values = ["hvm"]
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}
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filter {
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name = "architecture"
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values = ["x86_64"]
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}
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}
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#####################################################################
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# Block-8: Modules Block
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# AWS EC2 Instance Module
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module "ec2_cluster" {
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source = "terraform-aws-modules/ec2-instance/aws"
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version = "~> 2.0"
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name = "my-modules-demo"
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instance_count = 2
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ami = data.aws_ami.amzlinux.id
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instance_type = "t2.micro"
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key_name = "terraform-key"
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monitoring = true
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vpc_security_group_ids = ["sg-08b25c5a5bf489ffa"] # Get Default VPC Security Group ID and replace
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subnet_id = "subnet-4ee95470" # Get one public subnet id from default vpc and replace
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user_data = file("apache-install.sh")
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tags = {
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Terraform = "true"
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Environment = "dev"
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}
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}
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#####################################################################

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