GitHub Action: atmos-terraform-drift-detection

This Github Action is used to detect drift

Introduction

This Github Action is used to detect drift.

It will create or update github issue once drift is detect.

It is expected to run this action in a workflow with a scheduled run.

There is another companion action github-action-atmos-terraform-drift-remediation.

Usage

Workflow example

  name: 👽 Atmos Terraform Drift Detection

  on:
    schedule:
      - cron: "0 * * * *"

  permissions:
    id-token: write
    contents: write
    issues: write

  jobs:
    select-components:
      runs-on: ubuntu-latest
      name: Select Components
      outputs:
        matrix: ${{ steps.components.outputs.matrix }}
      steps:
        - name: Selected Components
          id: components
          uses: cloudposse/github-action-atmos-terraform-select-components@v0
          with:
            jq-query: 'to_entries[] | .key as $parent | .value.components.terraform | to_entries[] | select(.value.settings.github.actions_enabled // false) | [$parent, .key] | join(",")'
            debug: ${{ env.DEBUG_ENABLED }}

    plan-atmos-components:
      needs:
        - select-components
      runs-on: ubuntu-latest
      if: ${{ needs.select-components.outputs.matrix != '{"include":[]}' }}
      strategy:
        fail-fast: false # Don't fail fast to avoid locking TF State
        matrix: ${{ fromJson(needs.select-components.outputs.matrix) }}
      name: ${{ matrix.stack_slug }}
      env:
        GITHUB_TOKEN: "${{ github.token }}"
      steps:
        - name: Plan Atmos Component
          id: atmos-plan
          uses: cloudposse/github-action-atmos-terraform-plan@v0
          with:
            component: ${{ matrix.component }}
            stack: ${{ matrix.stack }}
            component-path: ${{ matrix.component_path }}
            drift-detection-mode-enabled: "true"
            terraform-plan-role: "arn:aws:iam::111111111111:role/acme-core-gbl-identity-gitops"
            terraform-state-bucket: "acme-core-ue2-auto-gitops"
            terraform-state-role: "arn:aws:iam::999999999999:role/acme-core-ue2-auto-gitops-gha"
            terraform-state-table: "acme-core-ue2-auto-gitops"
            aws-region: "us-east-2"

    drift-detection:
      needs:
        - plan-atmos-components
      runs-on: ubuntu-latest
      steps:
        - name: Drift Detection
          uses: cloudposse/github-action-atmos-terraform-drift-detection@v0
          with:
            max-opened-issues: '3'

Inputs

Name	Description	Default	Required
assignee-teams	Comma-separated list of teams to assign issues to. You have to pass github token with read:org scope. This is used only when issue is getting created.		false
assignee-users	Comma-separated list of users to assign issues to. This is used only when issue is getting created.		false
labels	Comma-separated list of additional labels to assign issues to.		false
max-opened-issues	Number of open drift detection issues. Use -1 to open unlimited number of issues. Default: 10	10	false
process-all	Process all issues or only the ones that relates to affected stacks. Default: false	false	false
token	Used to pull node distributions for Atmos from Cloud Posse's GitHub repository. Since there's a default, this is typically not supplied by the user. When running this action on github.com, the default value is sufficient. When running on GHES, you can pass a personal access token for github.com if you are experiencing rate limiting.	${{ github.server_url == 'https://github.com' && github.token || '' }}	false