Merge branch 'pawel/add_more_variables_to_additional_metrics-35267' into 'master'

Add kube_namespace and standardize common variables for additional metrics queries

See merge request !13169

changelogs/unreleased/pawel-add_more_variables_to_additional_metrics-35267.yml

+---
+title: Add support for kube_namespace in Metrics queries
+merge_request: 16169
+author:

lib/gitlab/prometheus/queries/additional_metrics_deployment_query.rb

@@ -6,14 +6,13 @@ module Gitlab
 
         def query(deployment_id)
           Deployment.find_by(id: deployment_id).try do |deployment|
-            query_context = {
-              environment_slug: deployment.environment.slug,
-              environment_filter: %{container_name!="POD",environment="#{deployment.environment.slug}"},
+            query_metrics(
+              common_query_context(
+                deployment.environment,
                 timeframe_start: (deployment.created_at - 30.minutes).to_f,
                 timeframe_end: (deployment.created_at + 30.minutes).to_f
-            }
-
-            query_metrics(query_context)
+              )
+            )
           end
         end
       end

lib/gitlab/prometheus/queries/additional_metrics_environment_query.rb

@@ -6,14 +6,9 @@ module Gitlab
 
         def query(environment_id)
           Environment.find_by(id: environment_id).try do |environment|
-            query_context = {
-              environment_slug: environment.slug,
-              environment_filter: %{container_name!="POD",environment="#{environment.slug}"},
-              timeframe_start: 8.hours.ago.to_f,
-              timeframe_end: Time.now.to_f
-            }
-
-            query_metrics(query_context)
+            query_metrics(
+              common_query_context(environment, timeframe_start: 8.hours.ago.to_f, timeframe_end: Time.now.to_f)
+            )
           end
         end
       end

lib/gitlab/prometheus/queries/query_additional_metrics.rb

@@ -42,15 +42,18 @@ module Gitlab
         end
 
         def process_query(context, query)
-          query_with_result = query.dup
+          query = query.dup
           result =
             if query.key?(:query_range)
-              client_query_range(query[:query_range] % context, start: context[:timeframe_start], stop: context[:timeframe_end])
+              query[:query_range] %= context
+              client_query_range(query[:query_range], start: context[:timeframe_start], stop: context[:timeframe_end])
             else
-              client_query(query[:query] % context, time: context[:timeframe_end])
+              query[:query] %= context
+              client_query(query[:query], time: context[:timeframe_end])
             end
-          query_with_result[:result] = result&.map(&:deep_symbolize_keys)
-          query_with_result
+
+          query[:result] = result&.map(&:deep_symbolize_keys)
+          query
         end
 
         def available_metrics
@@ -67,6 +70,16 @@ module Gitlab
 
           result.select { |group| group.metrics.any? }
         end
+
+        def common_query_context(environment, timeframe_start:, timeframe_end:)
+          {
+            timeframe_start: timeframe_start,
+            timeframe_end: timeframe_end,
+            ci_environment_slug: environment.slug,
+            kube_namespace: environment.project.kubernetes_service&.actual_namespace || '',
+            environment_filter: %{container_name!="POD",environment="#{environment.slug}"}
+          }
+        end
       end
     end
   end

spec/lib/gitlab/prometheus/queries/additional_metrics_deployment_query_spec.rb

 require 'spec_helper'
 
 describe Gitlab::Prometheus::Queries::AdditionalMetricsDeploymentQuery do
-  include Prometheus::MetricBuilders
-
-  let(:client) { double('prometheus_client') }
-  let(:environment) { create(:environment, slug: 'environment-slug') }
-  let(:deployment) { create(:deployment, environment: environment) }
-
-  subject(:query_result) { described_class.new(client).query(deployment.id) }
-
   around do |example|
     Timecop.freeze(Time.local(2008, 9, 1, 12, 0, 0)) { example.run }
   end
 
   include_examples 'additional metrics query' do
+    let(:deployment) { create(:deployment, environment: environment) }
+    let(:query_params) { [deployment.id] }
+
     it 'queries using specific time' do
       expect(client).to receive(:query_range).with(anything,
                                                    start: (deployment.created_at - 30.minutes).to_f,

spec/lib/gitlab/prometheus/queries/additional_metrics_environment_query_spec.rb

 require 'spec_helper'
 
 describe Gitlab::Prometheus::Queries::AdditionalMetricsEnvironmentQuery do
-  include Prometheus::MetricBuilders
-
-  let(:client) { double('prometheus_client') }
-  let(:environment) { create(:environment, slug: 'environment-slug') }
-
-  subject(:query_result) { described_class.new(client).query(environment.id) }
-
   around do |example|
     Timecop.freeze { example.run }
   end
 
   include_examples 'additional metrics query' do
+    let(:query_params) { [environment.id] }
+
     it 'queries using specific time' do
       expect(client).to receive(:query_range).with(anything, start: 8.hours.ago.to_f, stop: Time.now.to_f)
+
       expect(query_result).not_to be_nil
     end
   end

spec/support/prometheus/additional_metrics_shared_examples.rb

@@ -10,11 +10,61 @@ RSpec.shared_examples 'additional metrics query' do
     [{ 'metric': {}, 'values': [[1488758662.506, '0.00002996364761904785'], [1488758722.506, '0.00003090239047619091']] }]
   end
 
+  let(:client) { double('prometheus_client') }
+  let(:query_result) { described_class.new(client).query(*query_params) }
+  let(:environment) { create(:environment, slug: 'environment-slug') }
+
   before do
     allow(client).to receive(:label_values).and_return(metric_names)
     allow(metric_group_class).to receive(:all).and_return([simple_metric_group(metrics: [simple_metric])])
   end
 
+  context 'metrics query context' do
+    subject! { described_class.new(client) }
+
+    shared_examples 'query context containing environment slug and filter' do
+      it 'contains ci_environment_slug' do
+        expect(subject).to receive(:query_metrics).with(hash_including(ci_environment_slug: environment.slug))
+
+        subject.query(*query_params)
+      end
+
+      it 'contains environment filter' do
+        expect(subject).to receive(:query_metrics).with(
+          hash_including(
+            environment_filter: "container_name!=\"POD\",environment=\"#{environment.slug}\""
+          )
+        )
+
+        subject.query(*query_params)
+      end
+    end
+
+    describe 'project has Kubernetes service' do
+      let(:project) { create(:kubernetes_project) }
+      let(:environment) { create(:environment, slug: 'environment-slug', project: project) }
+      let(:kube_namespace) { project.kubernetes_service.actual_namespace }
+
+      it_behaves_like 'query context containing environment slug and filter'
+
+      it 'query context contains kube_namespace' do
+        expect(subject).to receive(:query_metrics).with(hash_including(kube_namespace: kube_namespace))
+
+        subject.query(*query_params)
+      end
+    end
+
+    describe 'project without Kubernetes service' do
+      it_behaves_like 'query context containing environment slug and filter'
+
+      it 'query context contains empty kube_namespace' do
+        expect(subject).to receive(:query_metrics).with(hash_including(kube_namespace: ''))
+
+        subject.query(*query_params)
+      end
+    end
+  end
+
   context 'with one group where two metrics is found' do
     before do
       allow(metric_group_class).to receive(:all).and_return([simple_metric_group])
@@ -51,6 +101,7 @@ RSpec.shared_examples 'additional metrics query' do
 
   context 'with two groups with one metric each' do
     let(:metrics) { [simple_metric(queries: [simple_query])] }
+
     before do
       allow(metric_group_class).to receive(:all).and_return(
         [