Log update delay and download times of repository sync

app/services/geo/base_sync_service.rb

@@ -85,5 +85,11 @@ module Geo
     def type
       self.class.type
     end
+
+    def update_delay(finish_time)
+      return unless project.last_repository_updated_at
+
+      (finish_time.to_f - project.last_repository_updated_at.to_f).round(3)
+    end
   end
 end

app/services/geo/repository_sync_service.rb

@@ -11,13 +11,18 @@ module Geo
 
     def fetch_project_repository
       log_info('Fetching project repository')
-      update_registry(started_at: DateTime.now)
+      start_time = DateTime.now
+      update_registry(started_at: start_time)
 
       begin
         project.ensure_repository
         project.repository.fetch_geo_mirror(ssh_url_to_repo)
 
-        update_registry(finished_at: DateTime.now)
+        finish_time = DateTime.now
+        log_info("Finished repository sync",
+                 update_delay_s: update_delay(finish_time),
+                 download_time_s: (finish_time - start_time).to_f.round(3))
+        update_registry(finished_at: finish_time)
       rescue Gitlab::Shell::Error, Geo::EmptyCloneUrlPrefixError => e
         log_error('Error syncing repository', e)
       rescue Gitlab::Git::Repository::NoRepository => e

app/services/geo/wiki_sync_service.rb

@@ -10,12 +10,17 @@ module Geo
 
     def fetch_wiki_repository
       log_info('Fetching wiki repository')
-      update_registry(started_at: DateTime.now)
+      start_time = DateTime.now
+      update_registry(started_at: start_time)
 
       begin
         project.wiki.ensure_repository
         project.wiki.repository.fetch_geo_mirror(ssh_url_to_wiki)
 
+        finish_time = DateTime.now
+        log_info("Finished wiki sync",
+                 update_delay_s: update_delay(finish_time),
+                 download_time_s: (finish_time - start_time).to_f.round(3))
         update_registry(finished_at: DateTime.now)
       rescue Gitlab::Git::Repository::NoRepository,
              Gitlab::Shell::Error,

lib/gitlab/geo/project_log_helpers.rb

 module Gitlab
   module Geo
     module ProjectLogHelpers
-      def log_info(message)
+      def log_info(message, details = {})
         data = base_log_data(message)
+        data.merge!(details) if details
         Gitlab::Geo::Logger.info(data)
       end