Merge pull request #8603 from lukas-vlcek/8602

Add Prometheus scrape config for openshift-logging

roles/openshift_prometheus/templates/prometheus.yml.j2

@@ -142,7 +142,66 @@ scrape_configs:
     # only scrape infrastructure components
     - source_labels: [__meta_kubernetes_namespace]
       action: keep
-      regex: 'default|logging|metrics|kube-.+|openshift|openshift-.+'
+      regex: 'default|metrics|kube-.+|openshift|openshift-.+'
+    # drop logging components managed by other scrape targets
+    - source_labels: [__meta_kubernetes_namespace]
+      action: drop
+      regex: '{{ openshift_logging_namespace | default('logging') }}'
+    # drop infrastructure components managed by other scrape targets
+    - source_labels: [__meta_kubernetes_service_name]
+      action: drop
+      regex: 'prometheus-node-exporter'
+    # only those that have requested scraping
+    - 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
+      target_label: __metrics_path__
+      regex: (.+)
+    - 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_namespace]
+      action: replace
+      target_label: kubernetes_namespace
+    - source_labels: [__meta_kubernetes_service_name]
+      action: replace
+      target_label: kubernetes_name
+
+# Scrape logging 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-logging-service-endpoints'
+
+  tls_config:
+    ca_file: /var/run/secrets/kubernetes.io/serviceaccount/ca.crt
+    insecure_skip_verify: true
+  bearer_token_file: /var/run/secrets/kubernetes.io/serviceaccount/token
+
+  kubernetes_sd_configs:
+  - role: endpoints
+    namespaces:
+      names:
+      - '{{ openshift_logging_namespace | default('logging') }}'
+
+  relabel_configs:
     # drop infrastructure components managed by other scrape targets
     - source_labels: [__meta_kubernetes_service_name]
       action: drop