lab18-vcs-code-promote.md

Lab: Terraform Cloud - VCS Code Promotion

GitOps is an operational framework that takes DevOps best practices that we use for application development (Version Control / Collaboration / Compliance / CI/CD) and apply these core concepts to infrastructure automation

• IaC (Infrastructure as Code)
• Merge Requests
• Pipelines

In this challenge, we will utilize the benefits the VCS connected workflow to promote code from a development branch into our main branch of the app-build code repository.

Duration: 30 minutes

• Task 1: Create a development branch in your app-build code repository.
• Task 2: Update your web-server-dev workspace to point to your development branch.
• Task 3: Perform and update on your development branch to validate
• Task 4: Create web-server-prod workspace to point to your main branch.
• Task 5: Update development branch
• Task 6: Merge Change into main branch

Task 1: Create a development branch in your app-build code repository.

In the app-build github repository, create a development branch from the

Task 2: Update your web-server-dev workspace to point to your development branch.

We will now update the Version Control setting of our web-server-dev workspace to point to our new development branch.

Update VCS Branch to development

• Task 3: Perform and update on your development branch to validate

This will trigger a Terraform run that is tied to the last commit on your development branch

Task 4: Create web-server-prod workspace to point to your main branch.

Create a new TFC workspace named web-server-prod that is tied to the app-build github repo by choosing a VCS Control workflow.

Update the variables of the new workspace with the values that were specified in the web-server-dev workspace, but add a -prod suffix on the identity and bucket variables.

Update the ssh-keys workspace to allow for the web-server-prod workspace to utilize the shared keys.

Once updated perform an planned run within the web-server-prod workspace to validate the buildout of the production environment.

Task 5: Update development branch

Update the main.tf in the development branch to include an server for ngnix.

main.tf

locals {
  servers = {
    server-iis = {
      server_os              = "windows_2019"
      identity               = "$var.identity-windows"
      subnet_id              = var.subnet_id
      vpc_security_group_ids = var.vpc_security_group_ids
    },
    server-apache = {
      server_os              = "ubuntu_20_04"
      identity               = "$var.identity-ubuntu"
      subnet_id              = var.subnet_id
      vpc_security_group_ids = var.vpc_security_group_ids
    },
    server-nginx = {
      server_os              = "ubuntu_20_04"
      identity               = "$var.identity-ubuntu"
      subnet_id              = var.subnet_id
      vpc_security_group_ids = var.vpc_security_group_ids
    }
  }
}

Commit the change to the development branch, and view the impact on your web-server-dev TFC workspace.

Confirm and Apply the update on the web-server-dev workspace.

Task 6: Merge Change into main branch

Once the web-server-dev TFC workspace completes its run, perform a pull request to

The GitOps workflow allows code to be merged into another branch via a merge request. Terraform Cloud's VCS control workflow integrates into this process showing if the deployment into the web-server-dev workspace was succesful.

This allows the merge request approver to have visibility that the code change was succesful in the development environment, and view the details of the change within Terraform Cloud.

When the Merge is approved this will automatically trigger the deployment of the code into the web-server-prod workspace.

We have sucessfully now made changes into the development environment and promoted those changes into production via a GitOps workflow.