Confirmation manifests for Prometheus Ingress discovery

ingress-v1.yaml

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: test-ingress
spec:
  tls:
  - hosts:
    - example.com
  rules:
  - host: "example.com"
    http:
      paths:
      - pathType: Prefix
        path: "/mypath"
        backend:
          service:
            name: mysvc
            port:
              number: 80

ingress-v1beta1.yaml

apiVersion: networking.k8s.io/v1beta1
kind: Ingress
metadata:
  name: test-ingress
spec:
  tls:
  - hosts:
    - example.com
  rules:
  - host: "example.com"
    http:
      paths:
      - backend:
          serviceName: mysvc
          servicePort: 80
        path: "/mypath"

prometheus-deploy.yaml

apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: prometheus
rules:
  - apiGroups: [""]
    resources:
      - nodes
      - nodes/metrics
      - services
      - endpoints
      - pods
    verbs: ["get", "list", "watch"]
  - apiGroups:
      - extensions
      - networking.k8s.io
    resources:
      - ingresses
    verbs: ["get", "list", "watch"]
  - nonResourceURLs: ["/metrics", "/metrics/cadvisor"]
    verbs: ["get"]
---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: prometheus
  namespace: default
---
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: default
---
apiVersion: v1
kind: Service
metadata:
  name: prometheus
  namespace: default
spec:
  selector:
    app: prometheus
  ports:
  - port: 9090
    targetPort: 9090
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: prometheus
  namespace: default
spec:
  replicas: 1
  selector:
    matchLabels:
      app: prometheus
  template:
    metadata:
      labels:
        app: prometheus
    spec:
      serviceAccountName: prometheus
      dnsPolicy: ClusterFirst
      containers:
      - name: prometheus
        image: prom/prometheus-linux-amd64:k8s-networking-v1
        imagePullPolicy: IfNotPresent
        volumeMounts:
        - name: config-volume
          mountPath: /etc/prometheus/config
        args:
        - --config.file=/etc/prometheus/config/prometheus.yml
      volumes:
      - name: config-volume
        configMap:
          name: prometheus-config
---
apiVersion: v1
kind: ConfigMap
metadata:
  name: prometheus-config
  namespace: default
  labels:
    app: prometheus
data:
  prometheus.yml: |
    scrape_configs:
      - job_name: "kubernetes-ingresses"
        metrics_path: /metrics
        kubernetes_sd_configs:
          - role: ingress
        relabel_configs:
          # dummy scrape target
          - target_label: __address__
            replacement: localhost:9090
          # just check ingress labels
          - action: labelmap
            regex: __meta_kubernetes_ingress_label_(.+)
          - source_labels: [__meta_kubernetes_namespace]
            target_label: kubernetes_namespace
          - source_labels: [__meta_kubernetes_ingress_name]
            target_label: kubernetes_name
          - source_labels: [__meta_kubernetes_ingress_scheme]
            target_label: kubernetes_ingress_scheme
          - source_labels: [__meta_kubernetes_ingress_path]
            target_label: kubernetes_ingress_path
          - source_labels: [__meta_kubernetes_ingress_host]
            target_label: kubernetes_ingress_host