skipper: enable backend and response metrics

This change adds new flags for enabling backend and response metrics
for skipper pods.

Signed-off-by: speruri <[email protected]>

Author: speruri

cluster/config-defaults.yaml

@@ -305,6 +305,12 @@ skipper_serve_method_metric: "false"
 # defines if the http response status code is included in the dimension
 # of the skipper_serve_host_duration_seconds_bucket metric.
 skipper_serve_status_code_metric: "false"
+# skipper_combined_response_metrics sets the flag -combined-response-metrics.
+# It enables reporting combined response time metrics
+skipper_combined_response_metrics: "false"
+# skipper_backend_host_metrics sets the flag -backend-host-metrics.
+# It enables reporting total serve time metrics for backend
+skipper_backend_host_metrics: "false"
 
 # disabled|provisioned|enabled routegroup validation via skipper webhook
 # can be one of disabled|provisioned|enabled

cluster/manifests/skipper/deployment.yaml

@@ -198,6 +198,8 @@ spec:
           - "-serve-method-metric={{ .Cluster.ConfigItems.skipper_serve_method_metric }}"
           - "-serve-status-code-metric={{ .Cluster.ConfigItems.skipper_serve_status_code_metric }}"
           - "-serve-host-counter"
+          - "-combined-response-metrics={{ .Cluster.ConfigItems.skipper_combined_response_metrics }}"
+          - "-backend-host-metrics={{ .Cluster.ConfigItems.skipper_backend_host_metrics }}"
           - "-disable-metrics-compat"
           - "-enable-profile"
           - "-memory-profile-rate={{ .Cluster.ConfigItems.skipper_memory_profile_rate }}"