server/monitoring/prometheus/prometheus.yaml

apiVersion: monitoring.coreos.com/v1
kind: Prometheus
metadata:
  name: prometheus-persistant
  namespace: monitoring
spec:
  replicas: 1
  retention: 7d
  resources:
    requests:
      memory: 400Mi
  securityContext:
    fsGroup: 2000
    runAsNonRoot: true
    runAsUser: 1000
  serviceAccountName: prometheus
  serviceMonitorSelector:
    matchExpressions:
    - key: name
      operator: In
      values:
      - kube-state-metrics
      - node-exporter
      - kubelet
      - traefik
      - rook-ceph-mgr
      - cloudflared
  serviceMonitorNamespaceSelector:
    matchExpressions:
    - key: kubernetes.io/metadata.name
      operator: In
      values:
      - monitoring
  storage:
    volumeClaimTemplate:
      spec:
        accessModes:
          - ReadWriteOnce
        storageClassName: ceph-block
        resources:
          requests:
            storage: 20Gi