Add snowplow stats enabled metric

config/metrics/settings/20211124061450_snowplow_enabled.yml

+---
+key_path: settings.snowplow_enabled
+name: snowplow_enabled_gitlab_instance
+description: Whether snowplow is enabled for the GitLab instance
+product_section: growth
+product_stage: growth
+product_group: group::product intelligence
+product_category: product intelligence
+value_type: boolean
+status: active
+milestone: "14.6"
+introduced_by_url: 'https://gitlab.com/gitlab-org/gitlab/-/merge_requests/75184'
+time_frame: none
+data_source: system
+instrumentation_class: SnowplowEnabledMetric
+data_category: optional
+performance_indicator_type: []
+distribution:
+- ce
+- ee
+tier:
+- free
+- premium
+- ultimate

config/metrics/settings/20211124085521_snowplow_configured_to_gitlab_collector_hostname.yml

+---
+key_path: settings.snowplow_configured_to_gitlab_collector
+name: snowplow_configured_to_gitlab_collector
+description: Metric informs if currently configured Snowplow collector hostname points towards Gitlab Snowplow collection pipeline.
+product_section: growth
+product_stage: growth
+product_group: group::product intelligence
+product_category: product intelligence
+value_type: boolean
+status: active
+milestone: "14.6"
+introduced_by_url: 'https://gitlab.com/gitlab-org/gitlab/-/merge_requests/75184'
+time_frame: none
+data_source: system
+instrumentation_class: SnowplowConfiguredToGitlabCollectorMetric
+data_category: optional
+performance_indicator_type: []
+distribution:
+- ce
+- ee
+tier:
+- free
+- premium
+- ultimate

lib/gitlab/usage/metrics/instrumentations/snowplow_configured_to_gitlab_collector_metric.rb

+# frozen_string_literal: true
+
+module Gitlab
+  module Usage
+    module Metrics
+      module Instrumentations
+        class SnowplowConfiguredToGitlabCollectorMetric < GenericMetric
+          GITLAB_SNOWPLOW_COLLECTOR_HOSTNAME = 'snowplow.trx.gitlab.net'
+
+          def value
+            Gitlab::CurrentSettings.snowplow_collector_hostname == GITLAB_SNOWPLOW_COLLECTOR_HOSTNAME
+          end
+        end
+      end
+    end
+  end
+end

lib/gitlab/usage/metrics/instrumentations/snowplow_enabled_metric.rb

+# frozen_string_literal: true
+
+module Gitlab
+  module Usage
+    module Metrics
+      module Instrumentations
+        class SnowplowEnabledMetric < GenericMetric
+          def value
+            Gitlab::CurrentSettings.snowplow_enabled?
+          end
+        end
+      end
+    end
+  end
+end

lib/gitlab/usage_data.rb

@@ -228,7 +228,9 @@ module Gitlab
             operating_system: alt_usage_data(fallback: nil) { operating_system },
             gitaly_apdex: alt_usage_data { gitaly_apdex },
             collected_data_categories: add_metric('CollectedDataCategoriesMetric', time_frame: 'none'),
-            service_ping_features_enabled: add_metric('ServicePingFeaturesMetric', time_frame: 'none')
+            service_ping_features_enabled: add_metric('ServicePingFeaturesMetric', time_frame: 'none'),
+            snowplow_enabled: add_metric('SnowplowEnabledMetric', time_frame: 'none'),
+            snowplow_configured_to_gitlab_collector: add_metric('SnowplowConfiguredToGitlabCollectorMetric', time_frame: 'none')
           }
         }
       end

spec/lib/gitlab/usage/metrics/instrumentations/snowplow_configured_to_gitlab_collector_metric_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Gitlab::Usage::Metrics::Instrumentations::SnowplowConfiguredToGitlabCollectorMetric do
+  using RSpec::Parameterized::TableSyntax
+
+  context 'for collector_hostname option' do
+    where(:collector_hostname, :expected_value) do
+      'snowplow.trx.gitlab.net' | true
+      'foo.bar.something.net'   | false
+    end
+
+    with_them do
+      before do
+        stub_application_setting(snowplow_collector_hostname: collector_hostname)
+      end
+
+      it_behaves_like 'a correct instrumented metric value', { time_frame: 'none' }
+    end
+  end
+end

spec/lib/gitlab/usage/metrics/instrumentations/snowplow_enabled_metric_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Gitlab::Usage::Metrics::Instrumentations::SnowplowEnabledMetric do
+  using RSpec::Parameterized::TableSyntax
+
+  context 'for snowplow enabled option' do
+    where(:snowplow_enabled, :expected_value) do
+      true  | true
+      false | false
+    end
+
+    with_them do
+      before do
+        stub_application_setting(snowplow_enabled: snowplow_enabled)
+      end
+
+      it_behaves_like 'a correct instrumented metric value', { time_frame: 'none' }
+    end
+  end
+end

spec/lib/gitlab/usage_data_spec.rb

@@ -1045,6 +1045,7 @@ RSpec.describe Gitlab::UsageData, :aggregate_failures do
 
     describe ".system_usage_data_settings" do
       let(:prometheus_client) { double(Gitlab::PrometheusClient) }
+      let(:snowplow_gitlab_host?) { Gitlab::CurrentSettings.snowplow_collector_hostname == 'snowplow.trx.gitlab.net' }
 
       before do
         allow(described_class).to receive(:operating_system).and_return('ubuntu-20.04')
@@ -1089,6 +1090,17 @@ RSpec.describe Gitlab::UsageData, :aggregate_failures do
       it 'gathers user_cap_feature_enabled' do
         expect(subject[:settings][:user_cap_feature_enabled]).to eq(Gitlab::CurrentSettings.new_user_signups_cap)
       end
+
+      context 'snowplow stats' do
+        before do
+          stub_feature_flags(usage_data_instrumentation: false)
+        end
+
+        it 'gathers snowplow stats' do
+          expect(subject[:settings][:snowplow_enabled]).to eq(Gitlab::CurrentSettings.snowplow_enabled?)
+          expect(subject[:settings][:snowplow_configured_to_gitlab_collector]).to eq(snowplow_gitlab_host?)
+        end
+      end
     end
   end