apiVersion: monitoring.coreos.com/v1
kind: Prometheus
metadata:
  name: prometheus-tidb
  namespace: monitoring
spec:
  serviceAccountName: monitoring-kube-prometheus-prometheus
  replicas: 1
  podMonitorSelector:
    matchLabels:
      monitor: tidb-cluster
  storage:
    volumeClaimTemplate:
      spec:
        accessModes:
        - ReadWriteOnce
        resources:
          requests:
            storage: 20Gi 
  # An empty podMonitorNamespaceSelector means PodMonitors in all namespaces are collected.
  podMonitorNamespaceSelector: {}