Github action env reference to azure terraform variables

[nehabam]

I am trying to use github action for terraform multistage deployment. i want to know how to create a custom variable in github action level which will refer the terraform files.

example - i am creating resource group name "rg" in my main.tf file. i have to deploy it to test , prod and stage environment . i want to add some suffix to this name like "rg-test" ," rg-prod" in github action level.
is it possible to create a environment variable in github action level and how it will access the terraform file(rg name).

this is my main.tf file.
resource "azurerm_resource_group" "example" {
name = "rg"
location = "West Europe"

}

Can we set anything on github action level so that whenever github action job for test env runs ,it will add ENV variable in the "name".
example - "rg-test" based on env name.

[nehabam]

this is github action file sample.

name: terraform

Controls when the workflow will run

on:

Triggers the workflow on push or pull request events but only for the "main" branch

push:
branches: [ "test-git" ]
pull_request:
branches: [ "test-git" ]

Allows you to run this workflow manually from the Actions tab

workflow_dispatch:

env:
ROOT_PATH: '${{github.workspace}}/terraform'
ARM_CLIENT_ID: ${{secrets.AZURE_CLIENT_ID}}
ARM_CLIENT_SECRET: ${{secrets.AZURE_CLIENT_SECRET}}
ARM_SUBSCRIPTION_ID: ${{secrets.AZURE_SUBSCRIPTION_ID}}
ARM_TENANT_ID: ${{secrets.AZURE_TENANT_ID}}
env: 'test'

A workflow run is made up of one or more jobs that can run sequentially or in parallel

jobs:

This workflow contains a single job called "build"

terraform_plan:
# The type of runner that the job will run on
runs-on: ubuntu-latest

defaults:
  run:
    shell: bash

# Steps represent a sequence of tasks that will be executed as part of the job
steps:
- name: Checkout
  uses: actions/checkout@v2
- name: Setup terraform
  uses: hashicorp/setup-terraform@v1
  with:
    cli_config_credentials_token: ${{ secrets.TF_API_TOKEN }}
- name: terraform init
  run: terraform init
  working-directory: ${{ env.ROOT_PATH }}
- name: terraform Plan
  run: terraform plan  -out=plan.tfplan
  working-directory: ${{ env.ROOT_PATH }}

[Jamonygr]

Yes. Make the suffix a Terraform variable, then pass it from GitHub Actions with TF_VAR_environment.

variable "environment" {
  type = string
}

resource "azurerm_resource_group" "example" {
  name     = "rg-${var.environment}"
  location = "West Europe"
}

env:
  TF_VAR_environment: test

For prod/stage, set TF_VAR_environment to a different value at the job or environment level. Terraform will read it automatically during plan and apply.