Importer Metrics: Add metrics to calculate rate of project imports

Related to: https://gitlab.com/gitlab-org/gitlab/-/issues/325900
Changelog: added
MR: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/61775

changelogs/unreleased/kassio-add-project-imports-total-metric.yml

+---
+title: Add metrics to calculate rate of project imports
+merge_request: 61775
+author:
+type: added

config/metrics/counts_28d/20210216183646_gitlab.yml

 ---
 key_path: usage_activity_by_stage_monthly.manage.project_imports.gitlab
-description: ''
+description: Count of projects imported from GitLab using Project Export/Import
 product_section: dev
 product_stage: manage
 product_group: group::import

config/metrics/counts_28d/20210514141518_monthly_projects_creation.yml

+---
+key_path: counts_monthly.projects
+description: 'Count number of projects created monthly'
+product_section: dev
+product_stage: plan
+product_group: group::project management
+product_category: ''
+value_type: number
+status: implemented
+milestone: "14.0"
+introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/61775
+time_frame: 28d
+data_source: database
+distribution:
+  - ce
+  - ee
+tier:
+  - free
+  - premium
+  - ultimate

config/metrics/counts_28d/20210520111133_total.yml

+---
+key_path: usage_activity_by_stage_monthly.manage.project_imports.total
+description: Total count of projects imported
+product_section: dev
+product_stage: manage
+product_group: group::import
+product_category:
+value_type: number
+status: implemented
+milestone: "14.0"
+introduced_by_url: "https://gitlab.com/gitlab-org/gitlab/-/merge_requests/61775"
+time_frame: 28d
+data_source: database
+distribution:
+- ce
+- ee
+tier:
+- free
+- premium
+- ultimate

config/metrics/counts_all/20210514141520_project_imports_total.yml

+---
+key_path: usage_activity_by_stage.manage.project_imports.total
+description: 'Count number of projects imported monthly'
+product_section: dev
+product_stage: manage
+product_group: group::import
+product_category:
+value_type: number
+status: implemented
+milestone: "14.0"
+introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/61775
+time_frame: all
+data_source: database
+distribution:
+  - ce
+  - ee
+tier:
+  - free
+  - premium
+  - ultimate

doc/development/usage_ping/dictionary.md

@@ -6718,6 +6718,18 @@ Status: `data_available`
 
 Tiers: `free`, `premium`, `ultimate`
 
+### `counts_monthly.projects`
+
+Count number of projects created monthly
+
+[YAML definition](https://gitlab.com/gitlab-org/gitlab/-/blob/master/config/metrics/counts_28d/20210514141518_monthly_projects_creation.yml)
+
+Group: `group::project management`
+
+Status: `implemented`
+
+Tiers: `free`, `premium`, `ultimate`
+
 ### `counts_monthly.projects_with_alerts_created`
 
 Monthly count of unique projects with HTTP alerting enabled
@@ -16548,6 +16560,18 @@ Status: `data_available`
 
 Tiers: `free`, `premium`, `ultimate`
 
+### `usage_activity_by_stage.manage.project_imports.total`
+
+Count number of projects imported monthly
+
+[YAML definition](https://gitlab.com/gitlab-org/gitlab/-/blob/master/config/metrics/counts_all/20210514141520_project_imports_total.yml)
+
+Group: `group::import`
+
+Status: `implemented`
+
+Tiers: `free`, `premium`, `ultimate`
+
 ### `usage_activity_by_stage.manage.projects_imported.bitbucket`
 
 Distinct count of users that imported projects from Bitbucket Cloud
@@ -18460,7 +18484,7 @@ Tiers: `free`, `premium`, `ultimate`
 
 ### `usage_activity_by_stage_monthly.manage.project_imports.gitlab`
 
-Missing description
+Count of projects imported from GitLab using Project Export/Import
 
 [YAML definition](https://gitlab.com/gitlab-org/gitlab/-/blob/master/config/metrics/counts_28d/20210216183646_gitlab.yml)
 
@@ -18506,6 +18530,18 @@ Status: `data_available`
 
 Tiers: `free`, `premium`, `ultimate`
 
+### `usage_activity_by_stage_monthly.manage.project_imports.total`
+
+Total count of projects imported
+
+[YAML definition](https://gitlab.com/gitlab-org/gitlab/-/blob/master/config/metrics/counts_28d/20210520111133_total.yml)
+
+Group: `group::import`
+
+Status: `implemented`
+
+Tiers: `free`, `premium`, `ultimate`
+
 ### `usage_activity_by_stage_monthly.manage.projects_imported.bitbucket`
 
 Count of projects imported from Bitbucket

lib/gitlab/usage_data.rb

@@ -232,6 +232,7 @@ module Gitlab
             successful_deployments: deployment_count(Deployment.success.where(last_28_days_time_period)),
             failed_deployments: deployment_count(Deployment.failed.where(last_28_days_time_period)),
             # rubocop: enable UsageData/LargeTable:
+            projects: count(Project.where(last_28_days_time_period), start: minimum_id(Project), finish: maximum_id(Project)),
             packages: count(::Packages::Package.where(last_28_days_time_period)),
             personal_snippets: count(PersonalSnippet.where(last_28_days_time_period)),
             project_snippets: count(ProjectSnippet.where(last_28_days_time_period)),
@@ -916,7 +917,7 @@ module Gitlab
       end
 
       def project_imports(time_period)
-        {
+        counters = {
           gitlab_project: projects_imported_count('gitlab_project', time_period),
           gitlab: projects_imported_count('gitlab', time_period),
           github: projects_imported_count('github', time_period),
@@ -927,6 +928,10 @@ module Gitlab
           manifest: projects_imported_count('manifest', time_period),
           gitlab_migration: count(::BulkImports::Entity.where(time_period).project_entity) # rubocop: disable CodeReuse/ActiveRecord
         }
+
+        counters[:total] = add(*counters.values)
+
+        counters
       end
 
       def projects_imported_count(from, time_period)

spec/lib/gitlab/usage_data_spec.rb

@@ -294,7 +294,8 @@ RSpec.describe Gitlab::UsageData, :aggregate_failures do
             gitlab: 2,
             gitlab_migration: 2,
             gitlab_project: 2,
-            manifest: 2
+            manifest: 2,
+            total: 18
           },
           issue_imports: {
             jira: 2,
@@ -341,7 +342,8 @@ RSpec.describe Gitlab::UsageData, :aggregate_failures do
             gitlab: 1,
             gitlab_migration: 1,
             gitlab_project: 1,
-            manifest: 1
+            manifest: 1,
+            total: 9
           },
           issue_imports: {
             jira: 1,
@@ -371,7 +373,6 @@ RSpec.describe Gitlab::UsageData, :aggregate_failures do
             csv: Gitlab::UsageData::DEPRECATED_VALUE
           },
           groups_imported: Gitlab::UsageData::DEPRECATED_VALUE
-
         }
       )
     end
@@ -706,10 +707,9 @@ RSpec.describe Gitlab::UsageData, :aggregate_failures do
   end
 
   describe '.system_usage_data_monthly' do
-    let_it_be(:project) { create(:project) }
+    let_it_be(:project) { create(:project, created_at: 3.days.ago) }
 
     before do
-      project = create(:project)
       env = create(:environment)
       create(:package, project: project, created_at: 3.days.ago)
       create(:package, created_at: 2.months.ago, project: project)
@@ -742,6 +742,7 @@ RSpec.describe Gitlab::UsageData, :aggregate_failures do
       expect(counts_monthly[:personal_snippets]).to eq(1)
       expect(counts_monthly[:project_snippets]).to eq(1)
       expect(counts_monthly[:projects_with_alerts_created]).to eq(1)
+      expect(counts_monthly[:projects]).to eq(1)
       expect(counts_monthly[:packages]).to eq(1)
       expect(counts_monthly[:promoted_issues]).to eq(1)
     end