apiVersion: v1
kind: ConfigMap
metadata:
  name: prometheus
data:
  prometheus.yml: |-
    global:
      scrape_interval:     30s
      evaluation_interval: 60s

    rule_files:
      - "*.rules"

    # A scrape configuration for running Prometheus on a Kubernetes cluster.
    # This uses separate scrape configs for cluster components (i.e. API server, node)
    # and services to allow each to use different authentication configs.
    #
    # Kubernetes labels will be added as Prometheus labels on metrics via the
    # `labelmap` relabeling action.
    scrape_configs:

    # Scrape config for API servers.
    - job_name: 'kubernetes-apiservers'

      # This TLS & bearer token file config is used to connect to the actual scrape
      # endpoints for cluster components. This is separate to discovery auth
      # configuration (`in_cluster` below) because discovery & scraping are two
      # separate concerns in Prometheus.
      tls_config:
        # workaround for Prometheus -> Kubernetes cert issue https://github.com/fabric8io/fabric8-devops/issues/438
        insecure_skip_verify: true
        ca_file: /var/run/secrets/kubernetes.io/serviceaccount/ca.crt
      bearer_token_file: /var/run/secrets/kubernetes.io/serviceaccount/token

      scheme: https

      kubernetes_sd_configs:
      - role: endpoints

      relabel_configs:
      - source_labels: [__meta_kubernetes_namespace, __meta_kubernetes_service_name, __meta_kubernetes_endpoint_port_name]
        action: keep
        regex: default;kubernetes;https

    # Scrape config for nodes.
    - job_name: 'kubernetes-nodes'

      # This TLS & bearer token file config is used to connect to the actual scrape
      # endpoints for cluster components. This is separate to discovery auth
      # configuration (`in_cluster` below) because discovery & scraping are two
      # separate concerns in Prometheus.
      tls_config:
        # workaround for Prometheus -> Kubernetes cert issue https://github.com/fabric8io/fabric8-devops/issues/438
        insecure_skip_verify: true
        ca_file: /var/run/secrets/kubernetes.io/serviceaccount/ca.crt
      bearer_token_file: /var/run/secrets/kubernetes.io/serviceaccount/token

      scheme: https

      kubernetes_sd_configs:
      - role: node

      relabel_configs:
      - action: labelmap
        regex: __meta_kubernetes_node_label_(.+)

    # Scrape config for node exporter pods deployed as a daemonset.
    - job_name: 'kubernetes-node-exporters'

      kubernetes_sd_configs:
      - role: pod

      relabel_configs:
      - source_labels: [__meta_kubernetes_pod_name]
        action: keep
        regex: node-exporter-.+
      - source_labels: [__address__, __meta_kubernetes_pod_annotation_prometheus_io_port]
        action: replace
        regex: (.+):(?:\d+);(\d+)
        replacement: ${1}:${2}
        target_label: __address__
      - source_labels: [__meta_kubernetes_pod_node_name]
        action: replace
        target_label: instance

    # Scrape config for service endpoints.
    #
    # The relabeling allows the actual service scrape endpoint to be configured
    # via the following annotations:
    #
    # * `prometheus.io/scrape`: Only scrape services that have a value of `true`
    # * `prometheus.io/scheme`: If the metrics endpoint is secured then you will need
    # to set this to `https` & most likely set the `tls_config` of the scrape config.
    # * `prometheus.io/path`: If the metrics path is not `/metrics` override this.
    # * `prometheus.io/port`: If the metrics are exposed on a different port to the
    # service then set this appropriately.
    - job_name: 'kubernetes-service-endpoints'

      kubernetes_sd_configs:
      - role: endpoints

      relabel_configs:
      - source_labels: [__meta_kubernetes_service_annotation_prometheus_io_scrape]
        action: keep
        regex: true
      - source_labels: [__meta_kubernetes_service_annotation_prometheus_io_scheme]
        action: replace
        target_label: __scheme__
        regex: (https?)
      - source_labels: [__meta_kubernetes_service_annotation_prometheus_io_path]
        action: replace
        regex: (.+)
        target_label: __metrics_path__
      - source_labels: [__address__, __meta_kubernetes_service_annotation_prometheus_io_port]
        action: replace
        target_label: __address__
        regex: (.+)(?::\d+);(\d+)
        replacement: $1:$2
      - action: labelmap
        regex: __meta_kubernetes_service_label_(.+)
      - source_labels: [__meta_kubernetes_service_namespace]
        action: replace
        target_label: kubernetes_namespace
      - source_labels: [__meta_kubernetes_service_name]
        action: replace
        target_label: kubernetes_name

    # Scrape config for probing services via the Blackbox Exporter.
    #
    # The relabeling allows the actual service scrape endpoint to be configured
    # via the following annotations:
    #
    # * `prometheus.io/probe`: Only probe services that have a value of `true`
    - job_name: 'kubernetes-services'

      metrics_path: /probe
      params:
        module: [http_2xx]

      kubernetes_sd_configs:
      - role: service

      relabel_configs:
      - source_labels: [__meta_kubernetes_service_annotation_prometheus_io_probe]
        action: keep
        regex: true
      - source_labels: []
        target_label: __address__
        replacement: blackbox
      - source_labels: [__address__]
        regex: (.*)(:80)?
        target_label: __param_target
      - source_labels: [__meta_kubernetes_service_name,__meta_kubernetes_service_namespace]
        target_label: __param_target
        regex: ([^;]+);(.+)
        replacement: $1.$2.svc
      - action: labelmap
        regex: __meta_kubernetes_service_label_(.+)
      - source_labels: [__meta_kubernetes_service_namespace]
        action: replace
        target_label: kubernetes_namespace
      - source_labels: [__meta_kubernetes_service_name]
        action: replace
        target_label: kubernetes_name

    # Scrape config for pods
    #
    # The relabeling allows the actual pod scrape endpoint to be configured via the
    # following annotations:
    #
    # * `prometheus.io/scrape`: Only scrape pods that have a value of `true`
    # * `prometheus.io/port`: Scrape the pod on the indicated port instead of the default of `9102`.
    - job_name: 'kubernetes-pods'

      kubernetes_sd_configs:
      - role: pod

      relabel_configs:
      - source_labels: [__meta_kubernetes_pod_annotation_prometheus_io_scrape]
        action: keep
        regex: true
      - source_labels: [__meta_kubernetes_pod_annotation_prometheus_io_scheme]
        action: replace
        target_label: __scheme__
        regex: (https?)
      - source_labels: [__meta_kubernetes_pod_annotation_prometheus_io_path]
        action: replace
        target_label: __metrics_path__
        regex: (.+)
      - source_labels: [__address__, __meta_kubernetes_pod_annotation_prometheus_io_port]
        action: replace
        regex: (.+):(?:\d+);(\d+)
        replacement: ${1}:${2}
        target_label: __address__
      - action: labelmap
        regex: __meta_kubernetes_pod_label_(.+)

  pod.rules: |-
    pod:memory_usage_bytes = sum(container_memory_usage_bytes{kubernetes_pod_name=~".+", job="kubernetes-nodes"}) by (kubernetes_pod_name, kubernetes_namespace)

    pod:network_receive_bytes:1m = sum(rate(container_network_receive_bytes_total{kubernetes_pod_name=~".+", job="kubernetes-nodes"}[1m])) by (kubernetes_pod_name, kubernetes_namespace)

    pod:network_transmit_bytes:1m = sum(rate(container_network_transmit_bytes_total{kubernetes_pod_name=~".+", job="kubernetes-nodes"}[1m])) by (kubernetes_pod_name, kubernetes_namespace)

    pod:cpu_usage_seconds:1m = sum(rate(container_cpu_usage_seconds_total{kubernetes_pod_name=~".+", job="kubernetes-nodes"}[1m])) by (kubernetes_pod_name, kubernetes_namespace)

    ALERT ServiceDown
    IF probe_success{job="kubernetes-services"} == 0
      FOR 10s
      LABELS {
        service = "{{$labels.kubernetes_namespace}}/{{$labels.kubernetes_name}}"
      }
      ANNOTATIONS {
        severity    ="page",
        summary     ="Service {{$labels.kubernetes_namespace}}/{{$labels.kubernetes_name}} down",
        description ="Service {{$labels.kubernetes_namespace}}/{{$labels.kubernetes_name}} has been down for more than 10 seconds!"
      }

