apiVersion: apps/v1
kind: Deployment
metadata:
  name: agent-monitor
  namespace: agent-monitor
spec:
  replicas: 3
  template:
    spec:
      # Production: require spreading across nodes
      affinity:
        podAntiAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
            - labelSelector:
                matchExpressions:
                  - key: app.kubernetes.io/name
                    operator: In
                    values:
                      - agent-monitor
              topologyKey: kubernetes.io/hostname
      topologySpreadConstraints:
        - maxSkew: 1
          topologyKey: kubernetes.io/hostname
          whenUnsatisfiable: DoNotSchedule
          labelSelector:
            matchLabels:
              app.kubernetes.io/name: agent-monitor
        - maxSkew: 1
          topologyKey: topology.kubernetes.io/zone
          whenUnsatisfiable: ScheduleAnyway
          labelSelector:
            matchLabels:
              app.kubernetes.io/name: agent-monitor
      containers:
        - name: agent-monitor
          resources:
            requests:
              memory: "256Mi"
              cpu: "200m"
            limits:
              memory: "1Gi"
              cpu: "1000m"