Terraform Drift Detection #47
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| name: Terraform Drift Detection | |
| on: | |
| workflow_dispatch: | |
| schedule: | |
| - cron: '0 3 * * *' | |
| permissions: | |
| contents: read | |
| issues: write | |
| env: | |
| AWS_ACCESS_KEY_ID: ${{ secrets.AWS_ACCESS_KEY_ID }} | |
| AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_SECRET_ACCESS_KEY }} | |
| AWS_REGION: ${{ secrets.AWS_BASE_REGION }} | |
| TFSTATE_BUCKET: ${{ secrets.TFSTATE_BUCKET }} | |
| TFSTATE_KEY: ${{ secrets.TFSTATE_KEY }} | |
| GRAFANA_ADMIN_PASSWORD: ${{ secrets.GRAFANA_ADMIN_PASSWORD }} | |
| ECR_REPOSITORY: ${{ secrets.ECR_REPOSITORY }} | |
| EKS_CLUSTER_NAME: ${{ secrets.EKS_CLUSTER_NAME }} | |
| CLOUDFLARE_ZONE_ID: ${{ secrets.CLOUDFLARE_ZONE_ID }} | |
| CLOUDFLARE_TOKEN: ${{ secrets.CLOUDFLARE_TOKEN }} | |
| CLOUDFLARE_EMAIL: ${{ secrets.CLOUDFLARE_EMAIL }} | |
| CLOUDFLARE_API_TOKEN: ${{ secrets.CLOUDFLARE_API_TOKEN }} | |
| SLACK_WEBHOOK: ${{ secrets.SLACK_WEBHOOK }} | |
| TAILSCALE_CLIENT_ID: ${{ secrets.TAILSCALE_CLIENT_ID }} | |
| TAILSCALE_CLIENT_SECRET: ${{ secrets.TAILSCALE_CLIENT_SECRET }} | |
| CROWDSEC_ENROLL_KEY: ${{ secrets.CROWDSEC_ENROLL_KEY }} | |
| jobs: | |
| terraform-plan: | |
| name: Terraform Plan | |
| runs-on: ubuntu-latest | |
| outputs: | |
| TFPLAN_EXIT_CODE: ${{ steps.tfplan.outputs.exitcode }} | |
| defaults: | |
| run: | |
| working-directory: ./terraform | |
| steps: | |
| - name: Checkout | |
| uses: actions/checkout@v4 | |
| - name: Configure AWS Credentials | |
| uses: aws-actions/configure-aws-credentials@v4 | |
| with: | |
| aws-access-key-id: ${{ env.AWS_ACCESS_KEY_ID }} | |
| aws-secret-access-key: ${{ env.AWS_SECRET_ACCESS_KEY }} | |
| aws-region: ${{ env.AWS_REGION }} | |
| - name: Setup Terraform | |
| uses: hashicorp/setup-terraform@v3 | |
| with: | |
| terraform_wrapper: false | |
| - name: Terraform Init | |
| run: | | |
| terraform init \ | |
| -backend-config="bucket=${TFSTATE_BUCKET}" \ | |
| -backend-config="key=${TFSTATE_KEY}" \ | |
| -backend-config="region=${AWS_REGION}" \ | |
| -backend-config="encrypt=true" | |
| - name: Terraform Plan | |
| id: tfplan | |
| env: | |
| TF_VAR_GRAFANA_ADMIN_PASSWORD: ${{ env.GRAFANA_ADMIN_PASSWORD }} | |
| TF_VAR_CLOUDFLARE_ZONE_ID: ${{ env.CLOUDFLARE_ZONE_ID }} | |
| TF_VAR_CLOUDFLARE_TOKEN: ${{ env.CLOUDFLARE_TOKEN }} | |
| TF_VAR_CLOUDFLARE_EMAIL: ${{ env.CLOUDFLARE_EMAIL }} | |
| TF_VAR_CLOUDFLARE_API_TOKEN: ${{ env.CLOUDFLARE_API_TOKEN }} | |
| TF_VAR_SLACK_WEBHOOK: ${{ env.SLACK_WEBHOOK }} | |
| TF_VAR_TAILSCALE_CLIENT_ID: ${{ env.TAILSCALE_CLIENT_ID }} | |
| TF_VAR_TAILSCALE_CLIENT_SECRET: ${{ env.TAILSCALE_CLIENT_SECRET }} | |
| TF_VAR_CROWDSEC_ENROLL_KEY: ${{ env.CROWDSEC_ENROLL_KEY }} | |
| run: | | |
| export exitcode=0 | |
| terraform plan -var-file ./stages/prod.tfvars -detailed-exitcode -no-color -out tfplan || exitcode=$? | |
| echo "exitcode=$exitcode" >> $GITHUB_ENV | |
| if [ $exitcode -eq 1 ]; then | |
| echo Terraform Plan Failed! | |
| exit 1 | |
| else | |
| exit 0 | |
| fi | |
| - name: Upload Terraform Plan | |
| uses: actions/upload-artifact@v4 | |
| with: | |
| name: tfplan | |
| path: tfplan | |
| - name: Create String Output | |
| id: tf-plan-string | |
| run: | | |
| TERRAFORM_PLAN=$(terraform show -no-color tfplan) | |
| delimiter="$(openssl rand -hex 8)" | |
| echo "summary<<${delimiter}" >> $GITHUB_OUTPUT | |
| echo "## Terraform Plan Output" >> $GITHUB_OUTPUT | |
| echo "<details><summary>Click to expand</summary>" >> $GITHUB_OUTPUT | |
| echo "" >> $GITHUB_OUTPUT | |
| echo '```terraform' >> $GITHUB_OUTPUT | |
| echo "$TERRAFORM_PLAN" >> $GITHUB_OUTPUT | |
| echo '```' >> $GITHUB_OUTPUT | |
| echo "</details>" >> $GITHUB_OUTPUT | |
| echo "${delimiter}" >> $GITHUB_OUTPUT | |
| - name: Publish Terraform Plan to Task Summary | |
| env: | |
| SUMMARY: ${{ steps.tf-plan-string.outputs.summary }} | |
| run: | | |
| echo "$SUMMARY" >> $GITHUB_STEP_SUMMARY | |
| - name: Publish Drift Report | |
| if: steps.tf-plan.outputs.exitcode == 2 | |
| uses: actions/github-script@v7 | |
| env: | |
| SUMMARY: "${{ steps.tf-plan-string.outputs.summary }}" | |
| with: | |
| github-token: ${{ github.token }} | |
| script: | | |
| const body = `${process.env.SUMMARY}`; | |
| const title = 'Terraform Configuration Drift Detected'; | |
| const creator = 'github-actions[bot]' | |
| // Look to see if there is an existing drift issue | |
| const issues = await github.rest.issues.listForRepo({ | |
| owner: context.repo.owner, | |
| repo: context.repo.repo, | |
| state: 'open', | |
| creator: creator, | |
| title: title | |
| }) | |
| if( issues.data.length > 0 ) { | |
| // We assume there shouldn't be more than 1 open issue, since we update any issue we find | |
| const issue = issues.data[0] | |
| if ( issue.body == body ) { | |
| console.log('Drift Detected: Found matching issue with duplicate content') | |
| } else { | |
| console.log('Drift Detected: Found matching issue, updating body') | |
| github.rest.issues.update({ | |
| owner: context.repo.owner, | |
| repo: context.repo.repo, | |
| issue_number: issue.number, | |
| body: body | |
| }) | |
| } | |
| } else { | |
| console.log('Drift Detected: Creating new issue') | |
| github.rest.issues.create({ | |
| owner: context.repo.owner, | |
| repo: context.repo.repo, | |
| title: title, | |
| body: body | |
| }) | |
| } | |
| - name: Publish Drift Report | |
| if: steps.tf-plan.outputs.exitcode == 0 | |
| uses: actions/github-script@v7 | |
| with: | |
| github-token: ${{ github.token }} | |
| script: | | |
| const title = 'Terraform Configuration Drift Detected'; | |
| const creator = 'github-actions[bot]' | |
| // Look to see if there is an existing drift issue | |
| const issues = await github.rest.issues.listForRepo({ | |
| owner: context.repo.owner, | |
| repo: context.repo.repo, | |
| state: 'open', | |
| creator: creator, | |
| title: title | |
| }) | |
| if( issues.data.length > 0 ) { | |
| const issue = issues.data[0] | |
| github.rest.issues.update({ | |
| owner: context.repo.owner, | |
| repo: context.repo.repo, | |
| issue_number: issue.number, | |
| state: 'closed' | |
| }) | |
| } | |
| - name: Error on Failure | |
| if: steps.tf-plan.outputs.exitcode == 2 | |
| run: exit 1 |