apiVersion: v1
kind: Namespace
metadata:
  name: prometheus

---

apiVersion: rbac.authorization.k8s.io/v1beta1
kind: ClusterRole
metadata:
  name: prometheus
rules:
- apiGroups: [""]
  resources:
  - nodes
  - nodes/proxy
  - services
  - endpoints
  - pods
  verbs: ["get", "list", "watch"]
- apiGroups:
  - extensions
  resources:
  - ingresses
  verbs: ["get", "list", "watch"]
- nonResourceURLs: ["/metrics"]
  verbs: ["get"]

---

apiVersion: v1
kind: ServiceAccount
metadata:
  name: prometheus
  namespace: prometheus

---

apiVersion: rbac.authorization.k8s.io/v1beta1
kind: ClusterRoleBinding
metadata:
  name: prometheus
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: prometheus
subjects:
- kind: ServiceAccount
  name: prometheus
  namespace: prometheus

---

kind: Service
apiVersion: v1
metadata:
  name: prometheus
  namespace: prometheus
  labels:
    app: prometheus
spec:
  type: NodePort
  selector:
    app: prometheus
  ports:
  - port: 9090
    targetPort: 9090
    name: http
    nodePort: 30909
    protocol: TCP

---

kind: Deployment
apiVersion: apps/v1
metadata:
  name: prometheus
  namespace: prometheus
spec:
  replicas: 1
  selector:
    matchLabels: 
      app: prometheus
  template:
    metadata:
      labels:
        app: prometheus
    spec:
      serviceAccountName: prometheus
      containers:
      - name: prometheus
        image: prom/prometheus:v2.7.1
        ports:
        - containerPort: 9090
        volumeMounts:
        - name: prometheus-config-volume
          mountPath: /etc/prometheus/prometheus.yml
          subPath: prometheus.yml
      volumes:
      - name: prometheus-config-volume
        configMap:
          name: prometheus-config
      restartPolicy: Always

---

kind: ConfigMap
apiVersion: v1
metadata:
  name: prometheus-config
  namespace: prometheus
data:
  prometheus.yml: |
    # my global config
    global:
      scrape_interval:     15s # Set the scrape interval to every 15 seconds. Default is every 1 minute.
      evaluation_interval: 15s # Evaluate rules every 15 seconds. The default is every 1 minute.

    scrape_configs:
    - job_name: 'kubernetes-pods'
      kubernetes_sd_configs:
      - role: pod
        namespaces:
          names:
          - kata-system

      relabel_configs:
      # Example relabel to scrape only pods that have
      # "prometheus.io/scrape: true" annotation.
      - source_labels: [__meta_kubernetes_pod_annotation_prometheus_io_scrape]
        action: keep
        regex: true
