Add Knative metrics to Prometheus

2 files changed, 15 insertions, 1 deletions

diff --git a/config/prometheus/common_metrics.yml b/config/prometheus/common_metrics.yml
index 9bdaf1575e9..884868c6336 100644
--- a/config/prometheus/common_metrics.yml
+++ b/config/prometheus/common_metrics.yml
@@ -259,3 +259,13 @@
       label: Pod average
       unit: "cores"
       track: canary
+  - title: "Knative function invocations"
+    y_label: "Invocations"
+    required_metrics:
+    - istio_revision_request_count
+    weight: 1
+    queries:
+    - id: system_metrics_knative_function_invocation_count
+      query_range: 'floor(sum(rate(istio_revision_request_count{destination_configuration="%{function_name}", destination_namespace="%{kube_namespace}"}[1m])*30))'
+      label: invocations / minute
+      unit: requests
diff --git a/config/routes/project.rb b/config/routes/project.rb
index 1cb8f331f6f..93d168fc595 100644
--- a/config/routes/project.rb
+++ b/config/routes/project.rb
@@ -252,7 +252,11 @@ constraints(::Constraints::ProjectUrlConstrainer.new) do
       end
 
       namespace :serverless do
-        get '/functions/:environment_id/:id', to: 'functions#show'
+        scope :functions do
+          get '/:environment_id/:id', to: 'functions#show'
+          get '/:environment_id/:id/metrics', to: 'functions#metrics', as: :metrics
+        end
+
         resources :functions, only: [:index]
       end