Add Terraform GitHub Actions workflow and setup #1
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| # This workflow uses OpenID Connect (OIDC) to securely authenticate with AWS. | |
| # It eliminates the need to store long-lived AWS Access Keys as GitHub secrets. | |
| name: 'Terraform CI/CD' | |
| on: | |
| push: | |
| branches: | |
| - main | |
| # Grant the GitHub Actions runner permissions to get an ID token. | |
| permissions: | |
| id-token: write # This is crucial for OIDC authentication | |
| contents: read | |
| jobs: | |
| terraform: | |
| name: 'Terraform Plan and Apply' | |
| runs-on: ubuntu-latest | |
| steps: | |
| # Step 1: Checkout the repository code. | |
| - name: Checkout Code | |
| uses: actions/checkout@v4 | |
| # Step 2: Configure AWS credentials using OIDC. | |
| # This action assumes an IAM role in your AWS account using a short-lived token. | |
| - name: Configure AWS Credentials | |
| uses: aws-actions/configure-aws-credentials@v4 | |
| with: | |
| # The IAM role ARN to assume. | |
| # We now use the GitHub secret for the AWS account ID. | |
| role-to-assume: 'arn:aws:iam::${{ secrets.AWS_ACCOUNT_ID }}:role/GitHubActionsRole' | |
| # Use the repository variable for the AWS region. | |
| aws-region: ${{ vars.AWS_REGION }} | |
| # Step 3: Install the latest version of Terraform. | |
| - name: Setup Terraform | |
| uses: hashicorp/setup-terraform@v3 | |
| with: | |
| terraform_version: 1.12.2 | |
| # Step 4: Inject sensitive variables from a GitHub Secret. | |
| - name: Create tfvars file from secret | |
| env: | |
| TF_VARS: ${{ secrets.TF_VARS_CONTENT }} | |
| run: echo "$TF_VARS" > terraform.tfvars | |
| # Step 5: Initialize the Terraform project. | |
| - name: Terraform Init | |
| id: init | |
| run: terraform init | |
| # Step 6: Run Checkov to scan for IaC security vulnerabilities. | |
| - name: Run Checkov | |
| id: checkov | |
| uses: bridgecrewio/checkov-action@v12 | |
| with: | |
| framework: terraform | |
| directory: '.' | |
| continue-on-error: true | |
| # Step 7: Validate the Terraform code. | |
| - name: Terraform Validate | |
| id: validate | |
| run: terraform validate | |
| # Step 8: Create a Terraform plan. | |
| - name: Terraform Plan | |
| id: plan | |
| run: terraform plan -no-color -var-file=terraform.tfvars | |
| # Step 9: Apply the Terraform plan. | |
| - name: Terraform Apply | |
| if: github.ref == 'refs/heads/main' | |
| run: terraform apply -auto-approve -var-file=terraform.tfvars |