1 files changed, 40 insertions, 0 deletions
diff --git a/lib/gitlab/usage/metrics/instrumentations/count_deployments_metric.rb b/lib/gitlab/usage/metrics/instrumentations/count_deployments_metric.rb
new file mode 100644
index 00000000000..97813fbb5c0
--- /dev/null
+++ b/lib/gitlab/usage/metrics/instrumentations/count_deployments_metric.rb
@@ -0,0 +1,40 @@
+# frozen_string_literal: true
+
+module Gitlab
+  module Usage
+    module Metrics
+      module Instrumentations
+        class CountDeploymentsMetric < DatabaseMetric
+          operation :count
+
+          start { Deployment.minimum(:id) }
+          finish { Deployment.maximum(:id) }
+
+          def initialize(metric_definition)
+            super
+
+            raise ArgumentError, 'Missing Deployment type' unless type
+            raise ArgumentError, "Invalid Deployment type: #{type}" unless type.in?(%i[all success failed])
+          end
+
+          private
+
+          def type
+            options[:type].to_sym
+          end
+
+          def relation
+            @metric_relation = case type
+                               when :all
+                                 Deployment
+                               when :success
+                                 Deployment.success
+                               when :failed
+                                 Deployment.failed
+                               end.where(time_constraints)
+          end
+        end
+      end
+    end
+  end
+end