init repo

.gitignore

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+##
+# Terraform repo .gitignore
+# Source: https://github.com/github/gitignore/blob/master/Terraform.gitignore
+##
+
+# Local .terraform directories
+**/.terraform/*
+
+# .tfstate files
+*.tfstate
+*.tfstate.*
+
+# Crash log files
+crash.log
+
+# Ignore any .tfvars files that are generated automatically for each Terraform run. Most
+# .tfvars files are managed as part of configuration and so should be included in
+# version control.
+#
+# example.tfvars
+
+# Ignore override files as they are usually used to override resources locally and so
+# are not checked in
+override.tf
+override.tf.json
+*_override.tf
+*_override.tf.json
+
+# Include override files you do wish to add to version control using negated pattern
+#
+# !example_override.tf
+
+# Include tfplan files to ignore the plan output of command: terraform plan -out=tfplan
+# example: *tfplan*

Terraform-YML-Pipeline.yml

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+# Terraform release pipeline
+variables:
+  tf_directory: '$(System.DefaultWorkingDirectory)/terraform/envA'
+  secure_file_name: 'terraform-secure-file.auto.tfvars'
+  terraform_version: '0.12.18'
+  pool: 'AWS-Pool'
+
+# Release instructions
+stages:
+- stage: Terraform_Plan
+  jobs:
+  - deployment: Terraform_Plan
+    displayName: Terraform Plan
+    pool: $(pool)
+    continueOnError: 'false'
+    environment: 'TerraformPlan_Environment'
+    strategy:
+      runOnce:
+        deploy:
+          steps:
+            - task: charleszipp.azure-pipelines-tasks-terraform.azure-pipelines-tasks-terraform-installer.TerraformInstaller@0
+              displayName: 'Install Terraform'
+              inputs:
+                terraformVersion: $(terraform_version)
+
+            - task: DownloadSecureFile@1
+              displayName: 'Download secure file'
+              inputs:
+                secureFile: $(secure_file_name)
+
+            - task: CopyFiles@2
+              displayName: 'Stage secure files'
+              inputs:
+                SourceFolder: '$(Agent.TempDirectory)'
+                Contents: '*.tfvars'
+                TargetFolder: $(tf_directory)
+
+            - task: Bash@3
+              displayName: 'Terraform Init'
+              inputs:
+                targetType: 'inline'
+                script: 'terraform init -input=false'
+                workingDirectory: $(tf_directory)
+                failOnStderr: true
+
+            - task: Bash@3
+              displayName: 'Terraform Validation'
+              inputs:
+                targetType: 'inline'
+                script: 'terraform validate'
+                workingDirectory: $(tf_directory)
+                failOnStderr: true
+
+            - task: Bash@3
+              displayName: 'Terraform Plan'
+              inputs:
+                targetType: 'inline'
+                script: 'terraform plan -lock=false -input=false'
+                workingDirectory: $(tf_directory)
+                failOnStderr: true
+
+- stage: Terraform_Apply
+  jobs:
+  - deployment: Terraform_Apply
+    displayName: Terraform Apply
+    pool: $(pool)
+    continueOnError: 'false'
+    # Run this stage if previous stage(s) succeeded and build reason ISN'T a pull request
+    condition: and(succeeded(), ne(variables['Build.Reason'], 'PullRequest'))
+    environment: 'YamlTerraformApplyEnvironment'
+    strategy:
+      runOnce:
+        deploy:
+          steps:
+            - task: charleszipp.azure-pipelines-tasks-terraform.azure-pipelines-tasks-terraform-installer.TerraformInstaller@0
+              displayName: 'Install Terraform'
+              inputs:
+                terraformVersion: $(terraform_version)
+
+            - task: DownloadSecureFile@1
+              displayName: 'Download secure file'
+              inputs:
+                secureFile: $(secure_file_name)
+
+            - task: CopyFiles@2
+              displayName: 'Stage secure files'
+              inputs:
+                SourceFolder: '$(Agent.TempDirectory)'
+                Contents: '*.tfvars'
+                TargetFolder: $(tf_directory)
+
+            - task: Bash@3
+              displayName: 'Terraform Init'
+              inputs:
+                targetType: 'inline'
+                script: 'terraform init -input=false'
+                workingDirectory: $(tf_directory)
+                failOnStderr: true
+
+            - task: Bash@3
+              displayName: 'Terraform Apply'
+              inputs:
+                targetType: 'inline'
+                script: 'terraform apply -auto-approve -input=false'
+                workingDirectory: $(tf_directory)
+                failOnStderr: true

terraform/envA/main.tf

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+# Require TF version to most recent
+terraform {
+  required_version = "~> 0.12.18"
+}
+
+# Download any stable version in AWS provider of 2.27.0 or higher
+provider "aws" {
+  version = "~> 2.27.0"
+  region  = "us-east-1"
+}
+
+# Build the VPC
+resource "aws_vpc" "vpc" {
+  cidr_block           = "10.1.0.0/16"
+  instance_tenancy     = "default"
+
+  tags = {
+    Name      = "Vpc"
+    Terraform = "true"
+  }
+}
+
+# Build route table 1
+resource "aws_route_table" "route_table1" {
+  vpc_id = aws_vpc.vpc.id
+
+  tags = {
+    Name = "RouteTable1"
+    Terraform = "true"
+  }
+}
+
+# Build route table 2
+resource "aws_route_table" "route_table2" {
+  vpc_id = aws_vpc.vpc.id
+
+  tags = {
+    Name = "RouteTable2"
+    Terraform = "true"
+  }
+}