prom operator examples

clusterrole.yaml

apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: prometheus
rules:
- apiGroups:
  - ""
  resources:
  - nodes
  - services
  - endpoints
  - pods
  verbs:
  - get
  - list
  - watch
- apiGroups:
  - ""
  resources:
  - configmaps
  verbs:
  - get
- apiGroups:
  - ""
  resources:
  - configmaps
  verbs:
  - get
- apiGroups:
  - ""
  resources:
  - nodes/metrics
  verbs:
  - get
- nonResourceURLs:
  - /metrics
  verbs:
  - get

clusterrolebinding.yaml

apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: prometheus
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: prometheus
subjects:
- kind: ServiceAccount
  name: prometheus
  namespace: prometheus

prometheus.yaml

apiVersion: monitoring.coreos.com/v1
kind: Prometheus
metadata:
  name: my-namespace # change this to your namespace name
  namespace: prometheus
spec:
  podMetadata:
    labels:
      app: prometheus
  replicas: 2
  resources:
    limits:
      cpu: 400m
      memory: 2Gi
    requests:
      cpu: 200m
      memory: 1Gi
  serviceAccountName: prometheus
  serviceMonitorNamespaceSelector:
    matchLabels: # your namespace should have a label of name: $namespace-name on it
      name: my-namespace # change this to your namespace name
  serviceMonitorSelector:
    matchLabels:
      prometheus: prometheus
  storage: # change this to an actual storage backend if you are not using thanos or whatever
    emptyDir:
      sizeLimit: 5Gi

serviceAccount.yaml

apiVersion: v1
kind: ServiceAccount
metadata:
  name: prometheus

servicemonitor.yaml

apiVersion: monitoring.coreos.com/v1
kind: ServiceMonitor
metadata:
  generation: 1
  labels:
    prometheus: prometheus # must have this label
  name: my-service-monitor
  namespace: my-namespace # change this to your namespace
spec:
  endpoints:
  - port: exporter # this must be the name of the port defined in your service
  selector:
    matchLabels: # this must match your service's labels
      app: my-app