terradiff.rules.yaml

# Example Prometheus alerting rules file for terradiff.
groups:
  - name: terradiff
    rules:
      - alert: Terradiff
        expr: max(terradiff_plan_exit_code) == 2
        for: 1h
        labels:
          severity: warning
        annotations:
          summary: Terraform config in Git differs from actual environment
          impact: Environment may be broken, or we may be unable to use normal procedures to update the environment
          url: <URL FOR TERRADIFF>  # 1. Replace this with the public URL for terradiff
      - alert: TerradiffBroken
        expr: max(terradiff_plan_exit_code) == 1
        for: 1h
        labels:
          severity: critical
        annotations:
          summary: Terradiff deployment cannot run terraform plan
          impact: We have no idea how much the actual environment has diverged from our configuration
          url: <URL FOR TERRADIFF>  # 1. Replace this with the public URL for terradiff