# prometheus-operator.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
  name: prometheus-operator
  namespace: monitoring
  labels:
    app.kubernetes.io/name: prometheus-operator
    app.kubernetes.io/component: controller
spec:
  replicas: 1
  selector:
    matchLabels:
      app.kubernetes.io/name: prometheus-operator
  template:
    metadata:
      labels:
        app.kubernetes.io/name: prometheus-operator
        app.kubernetes.io/component: controller
    spec:
      serviceAccountName: prometheus-operator
      containers:
      - name: operator
        image: quay.io/prometheus-operator/prometheus-operator:v0.66.0  # Example version
        imagePullPolicy: IfNotPresent
        args:
          - --address=0.0.0.0
          - --kubelet-service=kube-system/kubelet    # adjust if needed for your environment
          - --manage-crds=false                      # assume CRDs applied via GitOps beforehand
        ports:
          - name: http
            containerPort: 8080
        resources:
          requests:
            cpu: 100m
            memory: 100Mi
      # Node affinity not required; operator can run on any node with correct arch
      nodeSelector:
        kubernetes.io/os: linux            # ensure it's a Linux node