---
title: Deployment without PodDisruptionBudget
description: Datadog, the leading service for cloud-scale monitoring.
breadcrumbs: >-
  Docs > Datadog Security > Code Security > Infrastructure as Code (IaC)
  Security > IaC Security Rules > Deployment without PodDisruptionBudget
---

# Deployment without PodDisruptionBudget

{% callout %}
# Important note for users on the following Datadog sites: app.ddog-gov.com, us2.ddog-gov.com

{% alert level="danger" %}
This product is not supported for your selected [Datadog site](https://docs.datadoghq.com/getting_started/site.md). ({% placeholder "user-datadog-site-name" /%}).
{% /alert %}

{% /callout %}

## Metadata{% #metadata %}

**Id:** `terraform-kubernetes-deployment-without-pod-disruption-budget` 

**Provider:** Kubernetes

**Platform:** Terraform

**Severity:** Low

**Category:** Availability

#### Learn More{% #learn-more %}

- [Provider Reference](https://registry.terraform.io/providers/hashicorp/kubernetes/latest/docs/resources/deployment#selector)

### Description{% #description %}

Deployments should be assigned a `PodDisruptionBudget` to ensure high availability. For `kubernetes_deployment` resources with `spec.replicas > 1`, the deployment's `spec.selector.match_labels` should be targeted by a `kubernetes_pod_disruption_budget`. This ensures the deployment's selector labels are referenced by the `PodDisruptionBudget`, preventing excessive pod evictions during voluntary disruptions.

## Compliant Code Examples{% #compliant-code-examples %}

```terraform
resource "kubernetes_deployment" "example2" {
  metadata {
    name = "terraform-example"
    labels = {
      k8s-app2 = "prometheus2"
    }
  }

  spec {
    replicas = 3

    selector {
      match_labels = {
        k8s-app2 = "prometheus2"
      }
    }

    template {
      metadata {
        labels = {
          k8s-app2 = "prometheus2"
        }
      }

      spec {
        container {
          image = "nginx:1.7.8"
          name  = "example"

          resources {
            limits = {
              cpu    = "0.5"
              memory = "512Mi"
            }
            requests = {
              cpu    = "250m"
              memory = "50Mi"
            }
          }

          liveness_probe {
            http_get {
              path = "/nginx_status"
              port = 80

              http_header {
                name  = "X-Custom-Header"
                value = "Awesome"
              }
            }

            initial_delay_seconds = 3
            period_seconds        = 3
          }
        }
      }
    }
  }
}


resource "kubernetes_pod_disruption_budget" "demo2" {
  metadata {
    name = "demo"
  }
  spec {
    max_unavailable = "20%"
    selector {
      match_labels = {
        k8s-app2 = "prometheus2"
      }
    }
  }
}



resource "kubernetes_deployment" "example3" {
  metadata {
    name = "terraform-example"
    labels = {
      k8s-app2 = "prometheus2"
    }
  }

  spec {
    replicas = 3

    selector {
      match_labels = {
        k8s-app2 = "kubernetes_pod_disruption_budget.demo2.spec.selector.0.match_labels.k8s-app2"
      }
    }

    template {
      metadata {
        labels = {
          k8s-app2 = "prometheus2"
        }
      }

      spec {
        container {
          image = "nginx:1.7.8"
          name  = "example"

          resources {
            limits = {
              cpu    = "0.5"
              memory = "512Mi"
            }
            requests = {
              cpu    = "250m"
              memory = "50Mi"
            }
          }

          liveness_probe {
            http_get {
              path = "/nginx_status"
              port = 80

              http_header {
                name  = "X-Custom-Header"
                value = "Awesome"
              }
            }

            initial_delay_seconds = 3
            period_seconds        = 3
          }
        }
      }
    }
  }
}
```

## Non-Compliant Code Examples{% #non-compliant-code-examples %}

```terraform
resource "kubernetes_deployment" "example" {
  metadata {
    name = "terraform-example"
    labels = {
      k8s-app = "prometheus"
    }
  }

  spec {
    replicas = 3

    selector {
      match_labels = {
        k8s-app = "prometheus"
      }
    }

    template {
      metadata {
        labels = {
          k8s-app = "prometheus"
        }
      }

      spec {
        container {
          image = "nginx:1.7.8"
          name  = "example"

          resources {
            limits = {
              cpu    = "0.5"
              memory = "512Mi"
            }
            requests = {
              cpu    = "250m"
              memory = "50Mi"
            }
          }

          liveness_probe {
            http_get {
              path = "/nginx_status"
              port = 80

              http_header {
                name  = "X-Custom-Header"
                value = "Awesome"
              }
            }

            initial_delay_seconds = 3
            period_seconds        = 3
          }
        }
      }
    }
  }
}


resource "kubernetes_pod_disruption_budget" "demo" {
  metadata {
    name = "demo"
  }
  spec {
    max_unavailable = "20%"
    selector {
      match_labels = {
        test = "MyExampleApp"
      }
    }
  }
}
```