---
# PodDisruptionBudgets ensure minimum availability during voluntary disruptions
# (node drains, rolling updates, etc.)

apiVersion: policy/v1
kind: PodDisruptionBudget
metadata:
  name: prometheus-pdb
  namespace: monitoring
spec:
  minAvailable: 1
  selector:
    matchLabels:
      app: prometheus

---
apiVersion: policy/v1
kind: PodDisruptionBudget
metadata:
  name: alertmanager-pdb
  namespace: monitoring
spec:
  minAvailable: 2
  selector:
    matchLabels:
      app: alertmanager

---
apiVersion: policy/v1
kind: PodDisruptionBudget
metadata:
  name: grafana-pdb
  namespace: monitoring
spec:
  minAvailable: 1
  selector:
    matchLabels:
      app: grafana

---
# ResourceQuota limits total resources in monitoring namespace
apiVersion: v1
kind: ResourceQuota
metadata:
  name: monitoring-quota
  namespace: monitoring
spec:
  hard:
    # Compute resources
    requests.cpu: "10"
    requests.memory: "16Gi"
    limits.cpu: "20"
    limits.memory: "32Gi"

    # Storage
    persistentvolumeclaims: "10"
    requests.storage: "100Gi"

    # Object counts
    pods: "50"
    services: "20"
    configmaps: "30"
    secrets: "20"

---
# LimitRange sets default resource limits for pods in monitoring namespace
apiVersion: v1
kind: LimitRange
metadata:
  name: monitoring-limits
  namespace: monitoring
spec:
  limits:
  # Default container limits
  - max:
      cpu: "2"
      memory: "4Gi"
    min:
      cpu: "10m"
      memory: "16Mi"
    default:
      cpu: "500m"
      memory: "512Mi"
    defaultRequest:
      cpu: "100m"
      memory: "128Mi"
    type: Container

  # Pod limits
  - max:
      cpu: "4"
      memory: "8Gi"
    type: Pod

  # PVC limits
  - max:
      storage: "50Gi"
    min:
      storage: "1Gi"
    type: PersistentVolumeClaim