Add a rubocop for Rails.logger

Suggests to use a JSON structured log instead

Related to https://gitlab.com/gitlab-org/gitlab-ce/issues/54102

app/models/chat_team.rb

@@ -12,6 +12,6 @@ class ChatTeam < ApplicationRecord
     # Either the group is not found, or the user doesn't have the proper
     # access on the mattermost instance. In the first case, we're done either way
     # in the latter case, we can't recover by retrying, so we just log what happened
-    Rails.logger.error("Mattermost team deletion failed: #{e}")
+    Rails.logger.error("Mattermost team deletion failed: #{e}") # rubocop:disable Gitlab/RailsLogger
   end
 end

app/models/ci/build.rb

@@ -266,7 +266,7 @@ module Ci
           begin
             Ci::Build.retry(build, build.user)
           rescue Gitlab::Access::AccessDeniedError => ex
-            Rails.logger.error "Unable to auto-retry job #{build.id}: #{ex}"
+            Rails.logger.error "Unable to auto-retry job #{build.id}: #{ex}" # rubocop:disable Gitlab/RailsLogger
           end
         end
       end

app/models/concerns/cacheable_attributes.rb

@@ -49,7 +49,7 @@ module CacheableAttributes
       current_without_cache.tap { |current_record| current_record&.cache! }
     rescue => e
       if Rails.env.production?
-        Rails.logger.warn("Cached record for #{name} couldn't be loaded, falling back to uncached record: #{e}")
+        Rails.logger.warn("Cached record for #{name} couldn't be loaded, falling back to uncached record: #{e}") # rubocop:disable Gitlab/RailsLogger
       else
         raise e
       end

app/models/concerns/storage/legacy_namespace.rb

@@ -64,7 +64,7 @@ module Storage
 
         unless gitlab_shell.mv_namespace(repository_storage, full_path_before_last_save, full_path)
 
-          Rails.logger.error "Exception moving path #{repository_storage} from #{full_path_before_last_save} to #{full_path}"
+          Rails.logger.error "Exception moving path #{repository_storage} from #{full_path_before_last_save} to #{full_path}" # rubocop:disable Gitlab/RailsLogger
 
           # if we cannot move namespace directory we should rollback
           # db changes in order to prevent out of sync between db and fs

app/models/project.rb

@@ -784,6 +784,7 @@ class Project < ApplicationRecord
     job_id
   end
 
+  # rubocop:disable Gitlab/RailsLogger
   def log_import_activity(job_id, type: :import)
     job_type = type.to_s.capitalize
 
@@ -793,6 +794,7 @@ class Project < ApplicationRecord
       Rails.logger.error("#{job_type} job failed to create for #{full_path}.")
     end
   end
+  # rubocop:enable Gitlab/RailsLogger
 
   def reset_cache_and_import_attrs
     run_after_commit do
@@ -1665,6 +1667,7 @@ class Project < ApplicationRecord
   end
   # rubocop: enable CodeReuse/ServiceClass
 
+  # rubocop:disable Gitlab/RailsLogger
   def write_repository_config(gl_full_path: full_path)
     # We'd need to keep track of project full path otherwise directory tree
     # created with hashed storage enabled cannot be usefully imported using
@@ -1674,6 +1677,7 @@ class Project < ApplicationRecord
     Rails.logger.error("Error writing to .git/config for project #{full_path} (#{id}): #{e.message}.")
     nil
   end
+  # rubocop:enable Gitlab/RailsLogger
 
   def after_import
     repository.after_import
@@ -1715,6 +1719,7 @@ class Project < ApplicationRecord
     @pipeline_status ||= Gitlab::Cache::Ci::ProjectPipelineStatus.load_for_project(self)
   end
 
+  # rubocop:disable Gitlab/RailsLogger
   def add_export_job(current_user:, after_export_strategy: nil, params: {})
     job_id = ProjectExportWorker.perform_async(current_user.id, self.id, after_export_strategy, params)
 
@@ -1724,6 +1729,7 @@ class Project < ApplicationRecord
       Rails.logger.error "Export job failed to start for project ID #{self.id}"
     end
   end
+  # rubocop:enable Gitlab/RailsLogger
 
   def import_export_shared
     @import_export_shared ||= Gitlab::ImportExport::Shared.new(self)

app/models/project_import_state.rb

@@ -65,7 +65,7 @@ class ProjectImportState < ApplicationRecord
 
     update_column(:last_error, sanitized_message)
   rescue ActiveRecord::ActiveRecordError => e
-    Rails.logger.error("Error setting import status to failed: #{e.message}. Original error: #{sanitized_message}")
+    Rails.logger.error("Error setting import status to failed: #{e.message}. Original error: #{sanitized_message}") # rubocop:disable Gitlab/RailsLogger
   ensure
     @errors = original_errors
   end

app/models/repository.rb

@@ -273,7 +273,7 @@ class Repository
       # This will still fail if the file is corrupted (e.g. 0 bytes)
       raw_repository.write_ref(keep_around_ref_name(sha), sha)
     rescue Gitlab::Git::CommandError => ex
-      Rails.logger.error "Unable to create keep-around reference for repository #{disk_path}: #{ex}"
+      Rails.logger.error "Unable to create keep-around reference for repository #{disk_path}: #{ex}" # rubocop:disable Gitlab/RailsLogger
     end
   end
 
@@ -934,6 +934,7 @@ class Repository
     async_remove_remote(remote_name) if tmp_remote_name
   end
 
+  # rubocop:disable Gitlab/RailsLogger
   def async_remove_remote(remote_name)
     return unless remote_name
 
@@ -947,6 +948,7 @@ class Repository
 
     job_id
   end
+  # rubocop:enable Gitlab/RailsLogger
 
   def fetch_source_branch!(source_repository, source_branch, local_ref)
     raw_repository.fetch_source_branch!(source_repository.raw_repository, source_branch, local_ref)

app/models/ssh_host_key.rb

@@ -106,7 +106,7 @@ class SshHostKey
     if status.success? && !errors.present?
       { known_hosts: known_hosts }
     else
-      Rails.logger.debug("Failed to detect SSH host keys for #{id}: #{errors}")
+      Rails.logger.debug("Failed to detect SSH host keys for #{id}: #{errors}") # rubocop:disable Gitlab/RailsLogger
 
       { error: 'Failed to detect SSH host keys' }
     end

app/models/storage/legacy_project.rb

@@ -41,7 +41,7 @@ module Storage
           gitlab_shell.mv_repository(repository_storage, "#{old_full_path}.wiki", "#{new_full_path}.wiki")
           return true
         rescue => e
-          Rails.logger.error "Exception renaming #{old_full_path} -> #{new_full_path}: #{e}"
+          Rails.logger.error "Exception renaming #{old_full_path} -> #{new_full_path}: #{e}" # rubocop:disable Gitlab/RailsLogger
           # Returning false does not rollback after_* transaction but gives
           # us information about failing some of tasks
           return false

app/models/uploads/base.rb

@@ -7,7 +7,7 @@ module Uploads
     attr_reader :logger
 
     def initialize(logger: nil)
-      @logger ||= Rails.logger
+      @logger ||= Rails.logger # rubocop:disable Gitlab/RailsLogger
     end
 
     def delete_keys_async(keys_to_delete)

app/services/akismet_service.rb

@@ -25,7 +25,7 @@ class AkismetService
       is_spam, is_blatant = akismet_client.check(options[:ip_address], options[:user_agent], params)
       is_spam || is_blatant
     rescue => e
-      Rails.logger.error("Unable to connect to Akismet: #{e}, skipping check")
+      Rails.logger.error("Unable to connect to Akismet: #{e}, skipping check") # rubocop:disable Gitlab/RailsLogger
       false
     end
   end
@@ -63,7 +63,7 @@ class AkismetService
       akismet_client.public_send(type, options[:ip_address], options[:user_agent], params) # rubocop:disable GitlabSecurity/PublicSend
       true
     rescue => e
-      Rails.logger.error("Unable to connect to Akismet: #{e}, skipping!")
+      Rails.logger.error("Unable to connect to Akismet: #{e}, skipping!") # rubocop:disable Gitlab/RailsLogger
       false
     end
   end

app/services/ci/archive_trace_service.rb

@@ -24,11 +24,11 @@ module Ci
 
     def archive_error(error, job)
       failed_archive_counter.increment
-      Rails.logger.error "Failed to archive trace. id: #{job.id} message: #{error.message}"
+      Rails.logger.error "Failed to archive trace. id: #{job.id} message: #{error.message}" # rubocop:disable Gitlab/RailsLogger
 
       Gitlab::Sentry
         .track_exception(error,
-                         issue_url: 'https://gitlab.com/gitlab-org/gitlab-ce/issues/51502',
+                          issue_url: 'https://gitlab.com/gitlab-org/gitlab-ce/issues/51502',
                          extra: { job_id: job.id })
     end
   end

app/services/concerns/exclusive_lease_guard.rb

@@ -58,6 +58,6 @@ module ExclusiveLeaseGuard
   end
 
   def log_error(message, extra_args = {})
-    Rails.logger.error(message)
+    Rails.logger.error(message) # rubocop:disable Gitlab/RailsLogger
   end
 end

app/services/groups/destroy_service.rb

@@ -6,7 +6,7 @@ module Groups
 
     def async_execute
       job_id = GroupDestroyWorker.perform_async(group.id, current_user.id)
-      Rails.logger.info("User #{current_user.id} scheduled a deletion of group ID #{group.id} with job ID #{job_id}")
+      Rails.logger.info("User #{current_user.id} scheduled a deletion of group ID #{group.id} with job ID #{job_id}") # rubocop:disable Gitlab/RailsLogger
     end
 
     # rubocop: disable CodeReuse/ActiveRecord

app/services/labels/create_service.rb

@@ -20,7 +20,7 @@ module Labels
         label.save
         label
       else
-        Rails.logger.warn("target_params should contain :project or :group or :template, actual value: #{target_params}")
+        Rails.logger.warn("target_params should contain :project or :group or :template, actual value: #{target_params}") # rubocop:disable Gitlab/RailsLogger
       end
     end
   end

app/services/merge_requests/merge_service.rb

@@ -113,12 +113,12 @@ module MergeRequests
     end
 
     def handle_merge_error(log_message:, save_message_on_model: false)
-      Rails.logger.error("MergeService ERROR: #{merge_request_info} - #{log_message}")
+      Rails.logger.error("MergeService ERROR: #{merge_request_info} - #{log_message}") # rubocop:disable Gitlab/RailsLogger
       @merge_request.update(merge_error: log_message) if save_message_on_model
     end
 
     def log_info(message)
-      @logger ||= Rails.logger
+      @logger ||= Rails.logger # rubocop:disable Gitlab/RailsLogger
       @logger.info("#{merge_request_info} - #{message}")
     end
 

app/services/projects/after_import_service.rb

@@ -13,7 +13,7 @@ module Projects
         repository.delete_all_refs_except(RESERVED_REF_PREFIXES)
       end
     rescue Projects::HousekeepingService::LeaseTaken => e
-      Rails.logger.info(
+      Rails.logger.info( # rubocop:disable Gitlab/RailsLogger
         "Could not perform housekeeping for project #{@project.full_path} (#{@project.id}): #{e}")
     end
 

app/services/projects/create_service.rb

@@ -151,7 +151,7 @@ module Projects
       log_message = message.dup
 
       log_message << " Project ID: #{@project.id}" if @project&.id
-      Rails.logger.error(log_message)
+      Rails.logger.error(log_message) # rubocop:disable Gitlab/RailsLogger
 
       if @project && @project.persisted? && @project.import_state
         @project.import_state.mark_as_failed(message)

app/services/projects/destroy_service.rb

@@ -18,7 +18,7 @@ module Projects
       schedule_stale_repos_removal
 
       job_id = ProjectDestroyWorker.perform_async(project.id, current_user.id, params)
-      Rails.logger.info("User #{current_user.id} scheduled destruction of project #{project.full_path} with job ID #{job_id}")
+      Rails.logger.info("User #{current_user.id} scheduled destruction of project #{project.full_path} with job ID #{job_id}") # rubocop:disable Gitlab/RailsLogger
     end
 
     def execute

app/services/projects/hashed_storage/migrate_attachments_service.rb

@@ -5,7 +5,7 @@ module Projects
     class MigrateAttachmentsService < BaseAttachmentService
       def initialize(project, old_disk_path, logger: nil)
         @project = project
-        @logger = logger || Rails.logger
+        @logger = logger || Rails.logger # rubocop:disable Gitlab/RailsLogger
         @old_disk_path = old_disk_path
         @skipped = false
       end

app/services/projects/hashed_storage/rollback_attachments_service.rb

@@ -5,7 +5,7 @@ module Projects
     class RollbackAttachmentsService < BaseAttachmentService
       def initialize(project, logger: nil)
         @project = project
-        @logger = logger || Rails.logger
+        @logger = logger || Rails.logger # rubocop:disable Gitlab/RailsLogger
         @old_disk_path = project.disk_path
       end
 

app/services/projects/hashed_storage/rollback_service.rb

@@ -8,7 +8,7 @@ module Projects
       def initialize(project, old_disk_path, logger: nil)
         @project = project
         @old_disk_path = old_disk_path
-        @logger = logger || Rails.logger
+        @logger = logger || Rails.logger # rubocop:disable Gitlab/RailsLogger
       end
 
       def execute

app/services/projects/import_export/export_service.rb

@@ -62,7 +62,7 @@ module Projects
       end
 
       def cleanup_and_notify_error
-        Rails.logger.error("Import/Export - Project #{project.name} with ID: #{project.id} export error - #{@shared.errors.join(', ')}")
+        Rails.logger.error("Import/Export - Project #{project.name} with ID: #{project.id} export error - #{@shared.errors.join(', ')}") # rubocop:disable Gitlab/RailsLogger
 
         FileUtils.rm_rf(@shared.export_path)
 
@@ -76,7 +76,7 @@ module Projects
       end
 
       def notify_success
-        Rails.logger.info("Import/Export - Project #{project.name} with ID: #{project.id} successfully exported")
+        Rails.logger.info("Import/Export - Project #{project.name} with ID: #{project.id} successfully exported") # rubocop:disable Gitlab/RailsLogger
       end
 
       def notify_error

app/services/projects/propagate_service_template.rb

@@ -15,7 +15,7 @@ module Projects
     def propagate
       return unless @template.active?
 
-      Rails.logger.info("Propagating services for template #{@template.id}")
+      Rails.logger.info("Propagating services for template #{@template.id}") # rubocop:disable Gitlab/RailsLogger
 
       propagate_projects_with_template
     end

app/services/projects/update_statistics_service.rb

@@ -5,7 +5,7 @@ module Projects
     def execute
       return unless project
 
-      Rails.logger.info("Updating statistics for project #{project.id}")
+      Rails.logger.info("Updating statistics for project #{project.id}") # rubocop:disable Gitlab/RailsLogger
 
       project.statistics.refresh!(only: statistics.map(&:to_sym))
     end

app/services/submit_usage_ping_service.rb

@@ -28,7 +28,7 @@ class SubmitUsagePingService
 
     true
   rescue Gitlab::HTTP::Error => e
-    Rails.logger.info "Unable to contact GitLab, Inc.: #{e}"
+    Rails.logger.info "Unable to contact GitLab, Inc.: #{e}" # rubocop:disable Gitlab/RailsLogger
 
     false
   end

app/services/web_hook_service.rb

@@ -53,7 +53,7 @@ class WebHookService
       error_message: e.to_s
     )
 
-    Rails.logger.error("WebHook Error => #{e}")
+    Rails.logger.error("WebHook Error => #{e}") # rubocop:disable Gitlab/RailsLogger
 
     {
       status: :error,

app/uploaders/file_mover.rb

@@ -98,7 +98,7 @@ class FileMover
   end
 
   def revert
-    Rails.logger.warn("Markdown not updated, file move reverted for #{to_model}")
+    Rails.logger.warn("Markdown not updated, file move reverted for #{to_model}") # rubocop:disable Gitlab/RailsLogger
 
     if temp_file_uploader.file_storage?
       FileUtils.move(file_path, temp_file_path)

app/workers/concerns/new_issuable.rb

@@ -27,6 +27,6 @@ module NewIssuable
   # rubocop: enable CodeReuse/ActiveRecord
 
   def log_error(record_class, record_id)
-    Rails.logger.error("#{self.class}: couldn't find #{record_class} with ID=#{record_id}, skipping job")
+    Rails.logger.error("#{self.class}: couldn't find #{record_class} with ID=#{record_id}, skipping job") # rubocop:disable Gitlab/RailsLogger
   end
 end

app/workers/create_gpg_signature_worker.rb

@@ -22,7 +22,7 @@ class CreateGpgSignatureWorker
     commits.each do |commit|
       Gitlab::Gpg::Commit.new(commit).signature
     rescue => e
-      Rails.logger.error("Failed to create signature for commit #{commit.id}. Error: #{e.message}")
+      Rails.logger.error("Failed to create signature for commit #{commit.id}. Error: #{e.message}") # rubocop:disable Gitlab/RailsLogger
     end
   end
   # rubocop: enable CodeReuse/ActiveRecord

app/workers/delete_user_worker.rb

@@ -9,6 +9,6 @@ class DeleteUserWorker
 
     Users::DestroyService.new(current_user).execute(delete_user, options.symbolize_keys)
   rescue Gitlab::Access::AccessDeniedError => e
-    Rails.logger.warn("User could not be destroyed: #{e}")
+    Rails.logger.warn("User could not be destroyed: #{e}") # rubocop:disable Gitlab/RailsLogger
   end
 end

app/workers/email_receiver_worker.rb

@@ -16,7 +16,7 @@ class EmailReceiverWorker
   private
 
   def handle_failure(raw, error)
-    Rails.logger.warn("Email can not be processed: #{error}\n\n#{raw}")
+    Rails.logger.warn("Email can not be processed: #{error}\n\n#{raw}") # rubocop:disable Gitlab/RailsLogger
 
     return unless raw.present?
 

app/workers/expire_build_artifacts_worker.rb

@@ -18,7 +18,7 @@ class ExpireBuildArtifactsWorker
 
   # rubocop: disable CodeReuse/ActiveRecord
   def perform_legacy_artifacts_removal
-    Rails.logger.info 'Scheduling removal of build artifacts'
+    Rails.logger.info 'Scheduling removal of build artifacts' # rubocop:disable Gitlab/RailsLogger
 
     build_ids = Ci::Build.with_expired_artifacts.pluck(:id)
     build_ids = build_ids.map { |build_id| [build_id] }

app/workers/expire_build_instance_artifacts_worker.rb

@@ -12,7 +12,7 @@ class ExpireBuildInstanceArtifactsWorker
 
     return unless build&.project && !build.project.pending_delete
 
-    Rails.logger.info "Removing artifacts for build #{build.id}..."
+    Rails.logger.info "Removing artifacts for build #{build.id}..." # rubocop:disable Gitlab/RailsLogger
     build.erase_erasable_artifacts!
   end
   # rubocop: enable CodeReuse/ActiveRecord

app/workers/new_note_worker.rb

@@ -11,7 +11,7 @@ class NewNoteWorker
       NotificationService.new.new_note(note) unless skip_notification?(note)
       Notes::PostProcessService.new(note).execute
     else
-      Rails.logger.error("NewNoteWorker: couldn't find note with ID=#{note_id}, skipping job")
+      Rails.logger.error("NewNoteWorker: couldn't find note with ID=#{note_id}, skipping job") # rubocop:disable Gitlab/RailsLogger
     end
   end
 

app/workers/object_storage/migrate_uploads_worker.rb

@@ -37,6 +37,7 @@ module ObjectStorage
         end
       end
 
+      # rubocop:disable Gitlab/RailsLogger
       def report!(results)
         success, failures = results.partition(&:success?)
 
@@ -45,6 +46,7 @@ module ObjectStorage
 
         raise MigrationFailures.new(failures.map(&:error)) if failures.any?
       end
+      # rubocop:enable Gitlab/RailsLogger
 
       def header(success, failures)
         _("Migrated %{success_count}/%{total_count} files.") % { success_count: success.count, total_count: success.count + failures.count }
@@ -98,7 +100,7 @@ module ObjectStorage
       report!(results)
     rescue SanityCheckError => e
       # do not retry: the job is insane
-      Rails.logger.warn "#{self.class}: Sanity check error (#{e.message})"
+      Rails.logger.warn "#{self.class}: Sanity check error (#{e.message})" # rubocop:disable Gitlab/RailsLogger
     end
     # rubocop: enable CodeReuse/ActiveRecord
 

app/workers/repository_fork_worker.rb

@@ -35,7 +35,7 @@ class RepositoryForkWorker
   def start_fork(project)
     return true if start(project.import_state)
 
-    Rails.logger.info("Project #{project.full_path} was in inconsistent state (#{project.import_status}) while forking.")
+    Rails.logger.info("Project #{project.full_path} was in inconsistent state (#{project.import_status}) while forking.") # rubocop:disable Gitlab/RailsLogger
     false
   end
 end

app/workers/repository_import_worker.rb

@@ -36,7 +36,7 @@ class RepositoryImportWorker
   def start_import
     return true if start(project.import_state)
 
-    Rails.logger.info("Project #{project.full_path} was in inconsistent state (#{project.import_status}) while importing.")
+    Rails.logger.info("Project #{project.full_path} was in inconsistent state (#{project.import_status}) while importing.") # rubocop:disable Gitlab/RailsLogger
     false
   end
 

app/workers/repository_update_remote_mirror_worker.rb

@@ -45,6 +45,6 @@ class RepositoryUpdateRemoteMirrorWorker
   def fail_remote_mirror(remote_mirror, message)
     remote_mirror.mark_as_failed(message)
 
-    Rails.logger.error(message)
+    Rails.logger.error(message) # rubocop:disable Gitlab/RailsLogger
   end
 end

app/workers/run_pipeline_schedule_worker.rb

@@ -30,6 +30,7 @@ class RunPipelineScheduleWorker
 
   private
 
+  # rubocop:disable Gitlab/RailsLogger
   def error(schedule, error)
     failed_creation_counter.increment
 
@@ -41,6 +42,7 @@ class RunPipelineScheduleWorker
                        issue_url: 'https://gitlab.com/gitlab-org/gitlab-ce/issues/41231',
                        extra: { schedule_id: schedule.id })
   end
+  # rubocop:enable Gitlab/RailsLogger
 
   def failed_creation_counter
     @failed_creation_counter ||=

app/workers/stuck_ci_jobs_worker.rb

@@ -14,7 +14,7 @@ class StuckCiJobsWorker
   def perform
     return unless try_obtain_lease
 
-    Rails.logger.info "#{self.class}: Cleaning stuck builds"
+    Rails.logger.info "#{self.class}: Cleaning stuck builds" # rubocop:disable Gitlab/RailsLogger
 
     drop :running, BUILD_RUNNING_OUTDATED_TIMEOUT, 'ci_builds.updated_at < ?', :stuck_or_timeout_failure
     drop :pending, BUILD_PENDING_OUTDATED_TIMEOUT, 'ci_builds.updated_at < ?', :stuck_or_timeout_failure
@@ -66,7 +66,7 @@ class StuckCiJobsWorker
   # rubocop: enable CodeReuse/ActiveRecord
 
   def drop_build(type, build, status, timeout, reason)
-    Rails.logger.info "#{self.class}: Dropping #{type} build #{build.id} for runner #{build.runner_id} (status: #{status}, timeout: #{timeout}, reason: #{reason})"
+    Rails.logger.info "#{self.class}: Dropping #{type} build #{build.id} for runner #{build.runner_id} (status: #{status}, timeout: #{timeout}, reason: #{reason})" # rubocop:disable Gitlab/RailsLogger
     Gitlab::OptimisticLocking.retry_lock(build, 3) do |b|
       b.drop(reason)
     end

app/workers/stuck_import_jobs_worker.rb

@@ -38,7 +38,7 @@ class StuckImportJobsWorker
     completed_import_states = enqueued_import_states_with_jid.where(id: completed_import_state_ids)
 
     completed_import_state_jids = completed_import_states.map { |import_state| import_state.jid }.join(', ')
-    Rails.logger.info("Marked stuck import jobs as failed. JIDs: #{completed_import_state_jids}")
+    Rails.logger.info("Marked stuck import jobs as failed. JIDs: #{completed_import_state_jids}") # rubocop:disable Gitlab/RailsLogger
 
     completed_import_states.each do |import_state|
       import_state.mark_as_failed(error_message)

app/workers/stuck_merge_jobs_worker.rb

@@ -5,7 +5,7 @@ class StuckMergeJobsWorker
   include CronjobQueue
 
   def self.logger
-    Rails.logger
+    Rails.logger # rubocop:disable Gitlab/RailsLogger
   end
 
   # rubocop: disable CodeReuse/ActiveRecord

app/workers/trending_projects_worker.rb

@@ -5,7 +5,7 @@ class TrendingProjectsWorker
   include CronjobQueue
 
   def perform
-    Rails.logger.info('Refreshing trending projects')
+    Rails.logger.info('Refreshing trending projects') # rubocop:disable Gitlab/RailsLogger
 
     TrendingProject.refresh!
   end

app/workers/update_merge_requests_worker.rb

@@ -27,7 +27,7 @@ class UpdateMergeRequestsWorker
       "ref=#{ref}"
     ].join(',')
 
-    Rails.logger.info("UpdateMergeRequestsWorker#perform #{args_log}") if time.real > LOG_TIME_THRESHOLD
+    Rails.logger.info("UpdateMergeRequestsWorker#perform #{args_log}") if time.real > LOG_TIME_THRESHOLD # rubocop:disable Gitlab/RailsLogger
   end
   # rubocop: enable CodeReuse/ActiveRecord
 end

app/workers/upload_checksum_worker.rb

@@ -8,6 +8,6 @@ class UploadChecksumWorker
     upload.calculate_checksum!
     upload.save!
   rescue ActiveRecord::RecordNotFound
-    Rails.logger.error("UploadChecksumWorker: couldn't find upload #{upload_id}, skipping")
+    Rails.logger.error("UploadChecksumWorker: couldn't find upload #{upload_id}, skipping") # rubocop:disable Gitlab/RailsLogger
   end
 end

config/initializers/1_settings.rb

@@ -55,7 +55,7 @@ if Settings.ldap['enabled'] || Rails.env.test?
     server['tls_options'] ||= {}
 
     if server['ssl_version'] || server['ca_file']
-      Rails.logger.warn 'DEPRECATED: LDAP options `ssl_version` and `ca_file` should be nested within `tls_options`'
+      Rails.logger.warn 'DEPRECATED: LDAP options `ssl_version` and `ca_file` should be nested within `tls_options`' # rubocop:disable Gitlab/RailsLogger
     end
 
     if server['ssl_version']

config/initializers/7_prometheus_metrics.rb

@@ -17,7 +17,7 @@ def prometheus_default_multiproc_dir
 end
 
 Prometheus::Client.configure do |config|
-  config.logger = Rails.logger
+  config.logger = Rails.logger # rubocop:disable Gitlab/RailsLogger
 
   config.initial_mmap_file_size = 4 * 1024
 

config/initializers/active_record_lifecycle.rb

@@ -7,7 +7,7 @@ if defined?(ActiveRecord::Base) && !Sidekiq.server?
     ActiveSupport.on_load(:active_record) do
       ActiveRecord::Base.establish_connection
 
-      Rails.logger.debug("ActiveRecord connection established")
+      Rails.logger.debug("ActiveRecord connection established") # rubocop:disable Gitlab/RailsLogger
     end
   end
 end
@@ -18,6 +18,6 @@ if defined?(ActiveRecord::Base)
     # as there's no need for the master process to hold a connection
     ActiveRecord::Base.connection.disconnect!
 
-    Rails.logger.debug("ActiveRecord connection disconnected")
+    Rails.logger.debug("ActiveRecord connection disconnected") # rubocop:disable Gitlab/RailsLogger
   end
 end

config/initializers/deprecations.rb

@@ -2,7 +2,7 @@ if Rails.env.development? || ENV['GITLAB_LEGACY_PATH_LOG_MESSAGE']
   deprecator = ActiveSupport::Deprecation.new('11.0', 'GitLab')
 
   deprecator.behavior = -> (message, callstack) {
-    Rails.logger.warn("#{message}: #{callstack[1..20].join}")
+    Rails.logger.warn("#{message}: #{callstack[1..20].join}") # rubocop:disable Gitlab/RailsLogger
   }
 
   ActiveSupport::Deprecation.deprecate_methods(Gitlab::GitalyClient::StorageSettings, :legacy_disk_path, deprecator: deprecator)

config/initializers/sidekiq.rb

@@ -72,7 +72,7 @@ Sidekiq.configure_server do |config|
       cron_jobs[k]['class'] = cron_jobs[k].delete('job_class')
     else
       cron_jobs.delete(k)
-      Rails.logger.error("Invalid cron_jobs config key: '#{k}'. Check your gitlab config file.")
+      Rails.logger.error("Invalid cron_jobs config key: '#{k}'. Check your gitlab config file.") # rubocop:disable Gitlab/RailsLogger
     end
   end
   Sidekiq::Cron::Job.load_from_hash! cron_jobs
@@ -83,7 +83,7 @@ Sidekiq.configure_server do |config|
     Rails.application.config.database_configuration[Rails.env]
   db_config['pool'] = Sidekiq.options[:concurrency]
   ActiveRecord::Base.establish_connection(db_config)
-  Rails.logger.debug("Connection Pool size for Sidekiq Server is now: #{ActiveRecord::Base.connection.pool.instance_variable_get('@size')}")
+  Rails.logger.debug("Connection Pool size for Sidekiq Server is now: #{ActiveRecord::Base.connection.pool.instance_variable_get('@size')}") # rubocop:disable Gitlab/RailsLogger
 
   Gitlab.ee do
     Gitlab::Mirror.configure_cron_job!
@@ -94,7 +94,7 @@ Sidekiq.configure_server do |config|
       Rails.configuration.geo_database['pool'] = Sidekiq.options[:concurrency]
       Geo::TrackingBase.establish_connection(Rails.configuration.geo_database)
 
-      Rails.logger.debug("Connection Pool size for Sidekiq Server is now: #{Geo::TrackingBase.connection_pool.size} (Geo tracking database)")
+      Rails.logger.debug("Connection Pool size for Sidekiq Server is now: #{Geo::TrackingBase.connection_pool.size} (Geo tracking database)") # rubocop:disable Gitlab/RailsLogger
     end
   end
 

config/routes/api.rb

 post '/api/graphql', to: 'graphql#execute'
 mount GraphiQL::Rails::Engine, at: '/-/graphql-explorer', graphql_path: '/api/graphql'
 
-::API::API.logger Rails.logger
+::API::API.logger Rails.logger # rubocop:disable Gitlab/RailsLogger
 mount ::API::API => '/'

db/post_migrate/20180223124427_build_user_interacted_projects_table.rb

@@ -82,7 +82,7 @@ class BuildUserInteractedProjectsTable < ActiveRecord::Migration[4.2]
       iteration = 0
       records = 0
       begin
-        Rails.logger.info "Building user_interacted_projects table, batch ##{iteration}"
+        Rails.logger.info "Building user_interacted_projects table, batch ##{iteration}" # rubocop:disable Gitlab/RailsLogger
         result = execute <<~SQL
             INSERT INTO user_interacted_projects (user_id, project_id)
             SELECT e.user_id, e.project_id
@@ -93,7 +93,7 @@ class BuildUserInteractedProjectsTable < ActiveRecord::Migration[4.2]
         SQL
         iteration += 1
         records += result.cmd_tuples
-        Rails.logger.info "Building user_interacted_projects table, batch ##{iteration} complete, created #{records} overall"
+        Rails.logger.info "Building user_interacted_projects table, batch ##{iteration} complete, created #{records} overall" # rubocop:disable Gitlab/RailsLogger
         Kernel.sleep(SLEEP_TIME) if result.cmd_tuples > 0
       end while result.cmd_tuples > 0
     end

lib/api/helpers/internal_helpers.rb

@@ -72,7 +72,7 @@ module API
 
         result == 'PONG'
       rescue => e
-        Rails.logger.warn("GitLab: An unexpected error occurred in pinging to Redis: #{e}")
+        Rails.logger.warn("GitLab: An unexpected error occurred in pinging to Redis: #{e}") # rubocop:disable Gitlab/RailsLogger
         false
       end
 

lib/gitlab/auth.rb

@@ -94,6 +94,7 @@ module Gitlab
         end
       end
 
+      # rubocop:disable Gitlab/RailsLogger
       def rate_limit!(ip, success:, login:)
         rate_limiter = Gitlab::Auth::IpRateLimiter.new(ip)
         return unless rate_limiter.enabled?
@@ -114,6 +115,7 @@ module Gitlab
           end
         end
       end
+      # rubocop:enable Gitlab/RailsLogger
 
       private
 

lib/gitlab/auth/ldap/adapter.rb

@@ -55,7 +55,7 @@ module Gitlab
               response = ldap.get_operation_result
 
               unless response.code.zero?
-                Rails.logger.warn("LDAP search error: #{response.message}")
+                Rails.logger.warn("LDAP search error: #{response.message}") # rubocop:disable Gitlab/RailsLogger
               end
 
               []
@@ -67,7 +67,7 @@ module Gitlab
           retries += 1
           error_message = connection_error_message(error)
 
-          Rails.logger.warn(error_message)
+          Rails.logger.warn(error_message) # rubocop:disable Gitlab/RailsLogger
 
           if retries < MAX_SEARCH_RETRIES
             renew_connection_adapter

lib/gitlab/auth/ldap/config.rb

@@ -240,7 +240,7 @@ module Gitlab
             begin
               custom_options[:cert] = OpenSSL::X509::Certificate.new(custom_options[:cert])
             rescue OpenSSL::X509::CertificateError => e
-              Rails.logger.error "LDAP TLS Options 'cert' is invalid for provider #{provider}: #{e.message}"
+              Rails.logger.error "LDAP TLS Options 'cert' is invalid for provider #{provider}: #{e.message}" # rubocop:disable Gitlab/RailsLogger
             end
           end
 
@@ -248,7 +248,7 @@ module Gitlab
             begin
               custom_options[:key] = OpenSSL::PKey.read(custom_options[:key])
             rescue OpenSSL::PKey::PKeyError => e
-              Rails.logger.error "LDAP TLS Options 'key' is invalid for provider #{provider}: #{e.message}"
+              Rails.logger.error "LDAP TLS Options 'key' is invalid for provider #{provider}: #{e.message}" # rubocop:disable Gitlab/RailsLogger
             end
           end
 

lib/gitlab/auth/ldap/person.rb

@@ -45,7 +45,7 @@ module Gitlab
         def self.normalize_dn(dn)
           ::Gitlab::Auth::LDAP::DN.new(dn).to_normalized_s
         rescue ::Gitlab::Auth::LDAP::DN::FormatError => e
-          Rails.logger.info("Returning original DN \"#{dn}\" due to error during normalization attempt: #{e.message}")
+          Rails.logger.info("Returning original DN \"#{dn}\" due to error during normalization attempt: #{e.message}") # rubocop:disable Gitlab/RailsLogger
 
           dn
         end
@@ -57,13 +57,13 @@ module Gitlab
         def self.normalize_uid(uid)
           ::Gitlab::Auth::LDAP::DN.normalize_value(uid)
         rescue ::Gitlab::Auth::LDAP::DN::FormatError => e
-          Rails.logger.info("Returning original UID \"#{uid}\" due to error during normalization attempt: #{e.message}")
+          Rails.logger.info("Returning original UID \"#{uid}\" due to error during normalization attempt: #{e.message}") # rubocop:disable Gitlab/RailsLogger
 
           uid
         end
 
         def initialize(entry, provider)
-          Rails.logger.debug { "Instantiating #{self.class.name} with LDIF:\n#{entry.to_ldif}" }
+          Rails.logger.debug { "Instantiating #{self.class.name} with LDIF:\n#{entry.to_ldif}" } # rubocop:disable Gitlab/RailsLogger
           @entry = entry
           @provider = provider
         end

lib/gitlab/background_migration/add_merge_request_diff_commits_count.rb

@@ -9,7 +9,7 @@ module Gitlab
       end
 
       def perform(start_id, stop_id)
-        Rails.logger.info("Setting commits_count for merge request diffs: #{start_id} - #{stop_id}")
+        Rails.logger.info("Setting commits_count for merge request diffs: #{start_id} - #{stop_id}") # rubocop:disable Gitlab/RailsLogger
 
         update = '
           commits_count = (

lib/gitlab/background_migration/archive_legacy_traces.rb

@@ -14,7 +14,7 @@ module Gitlab
 
             build.trace.archive!
           rescue => e
-            Rails.logger.error "Failed to archive live trace. id: #{build.id} message: #{e.message}"
+            Rails.logger.error "Failed to archive live trace. id: #{build.id} message: #{e.message}" # rubocop:disable Gitlab/RailsLogger
           end
       end
     end

lib/gitlab/background_migration/calculate_wiki_sizes.rb

@@ -10,7 +10,7 @@ module Gitlab
           .includes(project: [:route, :group, namespace: [:owner]]).find_each do |statistics|
           statistics.refresh!(only: [:wiki_size])
         rescue => e
-          Rails.logger.error "Failed to update wiki statistics. id: #{statistics.id} message: #{e.message}"
+          Rails.logger.error "Failed to update wiki statistics. id: #{statistics.id} message: #{e.message}" # rubocop:disable Gitlab/RailsLogger
         end
       end
     end

lib/gitlab/background_migration/fill_valid_time_for_pages_domain_certificate.rb

@@ -32,7 +32,7 @@ module Gitlab
             )
           end
         rescue => e
-          Rails.logger.error "Failed to update pages domain certificate valid time. id: #{domain.id}, message: #{e.message}"
+          Rails.logger.error "Failed to update pages domain certificate valid time. id: #{domain.id}, message: #{e.message}" # rubocop:disable Gitlab/RailsLogger
         end
       end
     end

lib/gitlab/background_migration/fix_cross_project_label_links.rb

@@ -108,7 +108,7 @@ module Gitlab
 
           next unless matching_label
 
-          Rails.logger.info "#{resource.class.name.demodulize} #{resource.id}: replacing #{label.label_id} with #{matching_label.id}"
+          Rails.logger.info "#{resource.class.name.demodulize} #{resource.id}: replacing #{label.label_id} with #{matching_label.id}" # rubocop:disable Gitlab/RailsLogger
           LabelLink.update(label.label_link_id, label_id: matching_label.id)
         end
       end

lib/gitlab/background_migration/populate_untracked_uploads.rb

@@ -42,7 +42,7 @@ module Gitlab
                 #{e.message}
                 #{e.backtrace.join("\n  ")}
             MSG
-          Rails.logger.error(msg)
+          Rails.logger.error(msg) # rubocop:disable Gitlab/RailsLogger
           false
         end
       end

lib/gitlab/background_migration/prepare_untracked_uploads.rb

@@ -111,7 +111,7 @@ module Gitlab
         cmd = %W[#{ionice} -c Idle] + cmd if ionice
 
         log_msg = "PrepareUntrackedUploads find command: \"#{cmd.join(' ')}\""
-        Rails.logger.info log_msg
+        Rails.logger.info log_msg # rubocop:disable Gitlab/RailsLogger
 
         cmd
       end

lib/gitlab/cleanup/orphan_job_artifact_files.rb

@@ -17,7 +17,7 @@ module Gitlab
         @limit = limit
         @dry_run = dry_run
         @niceness = niceness || DEFAULT_NICENESS
-        @logger = logger || Rails.logger
+        @logger = logger || Rails.logger # rubocop:disable Gitlab/RailsLogger
         @total_found = @total_cleaned = 0
 
         new_batch!

lib/gitlab/cleanup/orphan_job_artifact_files_batch.rb

@@ -22,7 +22,7 @@ module Gitlab
       attr_reader :batch_size, :dry_run
       attr_accessor :artifact_files
 
-      def initialize(batch_size:, dry_run: true, logger: Rails.logger)
+      def initialize(batch_size:, dry_run: true, logger: Rails.logger) # rubocop:disable Gitlab/RailsLogger
         @batch_size = batch_size
         @dry_run = dry_run
         @logger = logger

lib/gitlab/cleanup/project_upload_file_finder.rb

@@ -49,7 +49,7 @@ module Gitlab
         cmd = %W[#{ionice} -c Idle] + cmd if ionice
 
         log_msg = "find command: \"#{cmd.join(' ')}\""
-        Rails.logger.info log_msg
+        Rails.logger.info log_msg # rubocop:disable Gitlab/RailsLogger
 
         cmd
       end

lib/gitlab/cleanup/project_uploads.rb

@@ -8,7 +8,7 @@ module Gitlab
       attr_reader :logger
 
       def initialize(logger: nil)
-        @logger = logger || Rails.logger
+        @logger = logger || Rails.logger # rubocop:disable Gitlab/RailsLogger
       end
 
       def run!(dry_run: true)

lib/gitlab/cleanup/remote_uploads.rb

@@ -7,7 +7,7 @@ module Gitlab
       BATCH_SIZE = 100
 
       def initialize(logger: nil)
-        @logger = logger || Rails.logger
+        @logger = logger || Rails.logger # rubocop:disable Gitlab/RailsLogger
       end
 
       def run!(dry_run: false)

lib/gitlab/database.rb

@@ -310,7 +310,7 @@ module Gitlab
       gitlab_database_transaction_seconds.observe(labels, duration_seconds)
     rescue Prometheus::Client::LabelSetValidator::LabelSetError => err
       # Ensure that errors in recording these metrics don't affect the operation of the application
-      Rails.logger.error("Unable to observe database transaction duration: #{err}")
+      Rails.logger.error("Unable to observe database transaction duration: #{err}") # rubocop:disable Gitlab/RailsLogger
     end
 
     # MonkeyPatch for ActiveRecord::Base for adding observability

lib/gitlab/database/migration_helpers.rb

@@ -61,7 +61,7 @@ module Gitlab
         end
 
         if index_exists?(table_name, column_name, options)
-          Rails.logger.warn "Index not created because it already exists (this may be due to an aborted migration or similar): table_name: #{table_name}, column_name: #{column_name}"
+          Rails.logger.warn "Index not created because it already exists (this may be due to an aborted migration or similar): table_name: #{table_name}, column_name: #{column_name}" # rubocop:disable Gitlab/RailsLogger
           return
         end
 
@@ -91,7 +91,7 @@ module Gitlab
         end
 
         unless index_exists?(table_name, column_name, options)
-          Rails.logger.warn "Index not removed because it does not exist (this may be due to an aborted migration or similar): table_name: #{table_name}, column_name: #{column_name}"
+          Rails.logger.warn "Index not removed because it does not exist (this may be due to an aborted migration or similar): table_name: #{table_name}, column_name: #{column_name}" # rubocop:disable Gitlab/RailsLogger
           return
         end
 
@@ -121,7 +121,7 @@ module Gitlab
         end
 
         unless index_exists_by_name?(table_name, index_name)
-          Rails.logger.warn "Index not removed because it does not exist (this may be due to an aborted migration or similar): table_name: #{table_name}, index_name: #{index_name}"
+          Rails.logger.warn "Index not removed because it does not exist (this may be due to an aborted migration or similar): table_name: #{table_name}, index_name: #{index_name}" # rubocop:disable Gitlab/RailsLogger
           return
         end
 
@@ -149,6 +149,8 @@ module Gitlab
       # column - The name of the column to create the foreign key on.
       # on_delete - The action to perform when associated data is removed,
       #             defaults to "CASCADE".
+      #
+      # rubocop:disable Gitlab/RailsLogger
       def add_concurrent_foreign_key(source, target, column:, on_delete: :cascade, name: nil)
         # Transactions would result in ALTER TABLE locks being held for the
         # duration of the transaction, defeating the purpose of this method.
@@ -208,6 +210,7 @@ module Gitlab
           execute("ALTER TABLE #{source} VALIDATE CONSTRAINT #{key_name};")
         end
       end
+      # rubocop:enable Gitlab/RailsLogger
 
       def foreign_key_exists?(source, target = nil, column: nil)
         foreign_keys(source).any? do |key|

lib/gitlab/database/rename_reserved_paths_migration/v1/rename_namespaces.rb

@@ -70,7 +70,7 @@ module Gitlab
 
               unless gitlab_shell.mv_namespace(repository_storage, old_full_path, new_full_path)
                 message = "Exception moving on shard #{repository_storage} from #{old_full_path} to #{new_full_path}"
-                Rails.logger.error message
+                Rails.logger.error message # rubocop:disable Gitlab/RailsLogger
               end
             end
           end

lib/gitlab/database/rename_reserved_paths_migration/v1/rename_projects.rb

@@ -56,7 +56,7 @@ module Gitlab
             unless gitlab_shell.mv_repository(project.repository_storage,
                                               old_path,
                                               new_path)
-              Rails.logger.error "Error moving #{old_path} to #{new_path}"
+              Rails.logger.error "Error moving #{old_path} to #{new_path}" # rubocop:disable Gitlab/RailsLogger
             end
           end
 

lib/gitlab/email/hook/disable_email_interceptor.rb

@@ -7,7 +7,7 @@ module Gitlab
         def self.delivering_email(message)
           message.perform_deliveries = false
 
-          Rails.logger.info "Emails disabled! Interceptor prevented sending mail #{message.subject}"
+          Rails.logger.info "Emails disabled! Interceptor prevented sending mail #{message.subject}" # rubocop:disable Gitlab/RailsLogger
         end
       end
     end

lib/gitlab/encoding_helper.rb

@@ -59,7 +59,7 @@ module Gitlab
         begin
           CharlockHolmes::Converter.convert(message, detect[:encoding], 'UTF-8')
         rescue ArgumentError => e
-          Rails.logger.warn("Ignoring error converting #{detect[:encoding]} into UTF8: #{e.message}")
+          Rails.logger.warn("Ignoring error converting #{detect[:encoding]} into UTF8: #{e.message}") # rubocop:disable Gitlab/RailsLogger
 
           ''
         end

lib/gitlab/git/repository.rb

@@ -936,7 +936,7 @@ module Gitlab
           gitaly_repository_client.cleanup if exists?
         end
       rescue Gitlab::Git::CommandError => e # Don't fail if we can't cleanup
-        Rails.logger.error("Unable to clean repository on storage #{storage} with relative path #{relative_path}: #{e.message}")
+        Rails.logger.error("Unable to clean repository on storage #{storage} with relative path #{relative_path}: #{e.message}") # rubocop:disable Gitlab/RailsLogger
         Gitlab::Metrics.counter(
           :failed_repository_cleanup_total,
           'Number of failed repository cleanup events'

lib/gitlab/gitaly_client.rb

@@ -67,7 +67,7 @@ module Gitlab
         File.read(cert_file).scan(PEM_REGEX).map do |cert|
           OpenSSL::X509::Certificate.new(cert).to_pem
         rescue OpenSSL::OpenSSLError => e
-          Rails.logger.error "Could not load certificate #{cert_file} #{e}"
+          Rails.logger.error "Could not load certificate #{cert_file} #{e}" # rubocop:disable Gitlab/RailsLogger
           Gitlab::Sentry.track_exception(e, extra: { cert_file: cert_file })
           nil
         end.compact

lib/gitlab/github_import/importer/lfs_objects_importer.rb

@@ -29,7 +29,7 @@ module Gitlab
             yield object
           end
         rescue StandardError => e
-          Rails.logger.error("The Lfs import process failed. #{e.message}")
+          Rails.logger.error("The Lfs import process failed. #{e.message}") # rubocop:disable Gitlab/RailsLogger
         end
       end
     end

lib/gitlab/github_import/importer/pull_requests_importer.rb

@@ -40,7 +40,7 @@ module Gitlab
 
           pname = project.path_with_namespace
 
-          Rails.logger
+          Rails.logger # rubocop:disable Gitlab/RailsLogger
             .info("GitHub importer finished updating repository for #{pname}")
 
           repository_updates_counter.increment

lib/gitlab/hashed_storage/migrator.rb

@@ -62,6 +62,7 @@ module Gitlab
       # Flag a project to be migrated to Hashed Storage
       #
       # @param [Project] project that will be migrated
+      # rubocop:disable Gitlab/RailsLogger
       def migrate(project)
         Rails.logger.info "Starting storage migration of #{project.full_path} (ID=#{project.id})..."
 
@@ -69,10 +70,12 @@ module Gitlab
       rescue => err
         Rails.logger.error("#{err.message} migrating storage of #{project.full_path} (ID=#{project.id}), trace - #{err.backtrace}")
       end
+      # rubocop:enable Gitlab/RailsLogger
 
       # Flag a project to be rolled-back to Legacy Storage
       #
       # @param [Project] project that will be rolled-back
+      # rubocop:disable Gitlab/RailsLogger
       def rollback(project)
         Rails.logger.info "Starting storage rollback of #{project.full_path} (ID=#{project.id})..."
 
@@ -80,6 +83,7 @@ module Gitlab
       rescue => err
         Rails.logger.error("#{err.message} rolling-back storage of #{project.full_path} (ID=#{project.id}), trace - #{err.backtrace}")
       end
+      # rubocop:enable Gitlab/RailsLogger
 
       # Returns whether we have any pending storage migration
       #

lib/gitlab/health_checks/simple_abstract_check.rb

@@ -18,7 +18,7 @@ module Gitlab
 
       def metrics
         result, elapsed = with_timing(&method(:check))
-        Rails.logger.error("#{human_name} check returned unexpected result #{result}") unless successful?(result)
+        Rails.logger.error("#{human_name} check returned unexpected result #{result}") unless successful?(result) # rubocop:disable Gitlab/RailsLogger
         [
           metric("#{metric_prefix}_timeout", result.is_a?(Timeout::Error) ? 1 : 0),
           metric("#{metric_prefix}_success", successful?(result) ? 1 : 0),

lib/gitlab/import_export/merge_request_parser.rb

@@ -43,7 +43,7 @@ module Gitlab
         target_ref = Gitlab::Git::BRANCH_REF_PREFIX + @merge_request.source_branch
 
         unless @project.repository.fetch_source_branch!(@project.repository, @diff_head_sha, target_ref)
-          Rails.logger.warn("Import/Export warning: Failed to create #{target_ref} for MR: #{@merge_request.iid}")
+          Rails.logger.warn("Import/Export warning: Failed to create #{target_ref} for MR: #{@merge_request.iid}") # rubocop:disable Gitlab/RailsLogger
         end
       end
 

lib/gitlab/import_export/project_tree_restorer.rb

@@ -20,7 +20,7 @@ module Gitlab
           json = IO.read(@path)
           @tree_hash = ActiveSupport::JSON.decode(json)
         rescue => e
-          Rails.logger.error("Import/Export error: #{e.message}")
+          Rails.logger.error("Import/Export error: #{e.message}") # rubocop:disable Gitlab/RailsLogger
           raise Gitlab::ImportExport::Error.new('Incorrect JSON format')
         end
 

lib/gitlab/import_export/saver.rb

@@ -18,7 +18,7 @@ module Gitlab
         if compress_and_save
           remove_export_path
 
-          Rails.logger.info("Saved project export #{archive_file}")
+          Rails.logger.info("Saved project export #{archive_file}") # rubocop:disable Gitlab/RailsLogger
 
           save_upload
         else

lib/gitlab/import_export/version_checker.rb

@@ -36,7 +36,7 @@ module Gitlab
       def different_version?(version)
         Gem::Version.new(version) != Gem::Version.new(Gitlab::ImportExport.version)
       rescue => e
-        Rails.logger.error("Import/Export error: #{e.message}")
+        Rails.logger.error("Import/Export error: #{e.message}") # rubocop:disable Gitlab/RailsLogger
         raise Gitlab::ImportExport::Error.new('Incorrect VERSION format')
       end
     end

lib/gitlab/metrics/samplers/base_sampler.rb

@@ -19,7 +19,7 @@ module Gitlab
         def safe_sample
           sample
         rescue => e
-          Rails.logger.warn("#{self.class}: #{e}, stopping")
+          Rails.logger.warn("#{self.class}: #{e}, stopping") # rubocop:disable Gitlab/RailsLogger
           stop
         end
 

lib/gitlab/metrics/samplers/puma_sampler.rb

@@ -43,7 +43,7 @@ module Gitlab
         def puma_stats
           Puma.stats
         rescue NoMethodError
-          Rails.logger.info "PumaSampler: stats are not available yet, waiting for Puma to boot"
+          Rails.logger.info "PumaSampler: stats are not available yet, waiting for Puma to boot" # rubocop:disable Gitlab/RailsLogger
           nil
         end
 

lib/gitlab/middleware/read_only/controller.rb

@@ -25,7 +25,7 @@ module Gitlab
 
         def call
           if disallowed_request? && Gitlab::Database.read_only?
-            Rails.logger.debug('GitLab ReadOnly: preventing possible non read-only operation')
+            Rails.logger.debug('GitLab ReadOnly: preventing possible non read-only operation') # rubocop:disable Gitlab/RailsLogger
 
             if json_request?
               return [403, { 'Content-Type' => APPLICATION_JSON }, [{ 'message' => ERROR_MESSAGE }.to_json]]

lib/gitlab/pages_client.rb

@@ -110,7 +110,7 @@ module Gitlab
         end
       rescue Errno::EACCES => ex
         # TODO stop rescuing this exception in GitLab 11.0 https://gitlab.com/gitlab-org/gitlab-ce/issues/45672
-        Rails.logger.error("Could not write pages admin token file: #{ex}")
+        Rails.logger.error("Could not write pages admin token file: #{ex}") # rubocop:disable Gitlab/RailsLogger
       rescue Errno::EEXIST
         # Another process wrote the token file concurrently with us. Use their token, not ours.
       end

lib/gitlab/reference_counter.rb

@@ -22,6 +22,7 @@ module Gitlab
       end
     end
 
+    # rubocop:disable Gitlab/RailsLogger
     def decrease
       redis_cmd do |redis|
         current_value = redis.decr(key)
@@ -32,6 +33,7 @@ module Gitlab
         end
       end
     end
+    # rubocop:enable Gitlab/RailsLogger
 
     private
 
@@ -39,7 +41,7 @@ module Gitlab
       Gitlab::Redis::SharedState.with { |redis| yield(redis) }
       true
     rescue => e
-      Rails.logger.warn("GitLab: An unexpected error occurred in writing to Redis: #{e}")
+      Rails.logger.warn("GitLab: An unexpected error occurred in writing to Redis: #{e}") # rubocop:disable Gitlab/RailsLogger
       false
     end
   end

lib/gitlab/repository_cache_adapter.rb

@@ -145,7 +145,7 @@ module Gitlab
     def expire_method_caches(methods)
       methods.each do |name|
         unless cached_methods.include?(name.to_sym)
-          Rails.logger.error "Requested to expire non-existent method '#{name}' for Repository"
+          Rails.logger.error "Requested to expire non-existent method '#{name}' for Repository" # rubocop:disable Gitlab/RailsLogger
           next
         end
 

lib/gitlab/sanitizers/exif.rb

@@ -48,7 +48,7 @@ module Gitlab
 
       attr_reader :logger
 
-      def initialize(logger: Rails.logger)
+      def initialize(logger: Rails.logger) # rubocop:disable Gitlab/RailsLogger
         @logger = logger
       end
 

lib/gitlab/shell.rb

@@ -78,7 +78,7 @@ module Gitlab
 
       true
     rescue => err # Once the Rugged codes gets removes this can be improved
-      Rails.logger.error("Failed to add repository #{storage}/#{disk_path}: #{err}")
+      Rails.logger.error("Failed to add repository #{storage}/#{disk_path}: #{err}") # rubocop:disable Gitlab/RailsLogger
       false
     end
 
@@ -153,7 +153,7 @@ module Gitlab
 
       !!rm_directory(storage, "#{name}.git")
     rescue ArgumentError => e
-      Rails.logger.warn("Repository does not exist: #{e} at: #{name}.git")
+      Rails.logger.warn("Repository does not exist: #{e} at: #{name}.git") # rubocop:disable Gitlab/RailsLogger
       false
     end
 
@@ -238,7 +238,7 @@ module Gitlab
     def remove_keys_not_found_in_db
       return unless self.authorized_keys_enabled?
 
-      Rails.logger.info("Removing keys not found in DB")
+      Rails.logger.info("Removing keys not found in DB") # rubocop:disable Gitlab/RailsLogger
 
       batch_read_key_ids do |ids_in_file|
         ids_in_file.uniq!
@@ -248,7 +248,7 @@ module Gitlab
 
         ids_to_remove = ids_in_file - keys_in_db.pluck(:id)
         ids_to_remove.each do |id|
-          Rails.logger.info("Removing key-#{id} not found in DB")
+          Rails.logger.info("Removing key-#{id} not found in DB") # rubocop:disable Gitlab/RailsLogger
           remove_key("key-#{id}")
         end
       end
@@ -368,7 +368,7 @@ module Gitlab
 
       return true if status.zero?
 
-      Rails.logger.error("gitlab-shell failed with error #{status}: #{output}")
+      Rails.logger.error("gitlab-shell failed with error #{status}: #{output}") # rubocop:disable Gitlab/RailsLogger
       false
     end
 
@@ -465,7 +465,7 @@ module Gitlab
       end
 
       def logger
-        Rails.logger
+        Rails.logger # rubocop:disable Gitlab/RailsLogger
       end
     end
   end

lib/mattermost/session.rb

@@ -41,7 +41,7 @@ module Mattermost
         begin
           yield self
         rescue Errno::ECONNREFUSED => e
-          Rails.logger.error(e.message + "\n" + e.backtrace.join("\n"))
+          Rails.logger.error(e.message + "\n" + e.backtrace.join("\n")) # rubocop:disable Gitlab/RailsLogger
           raise Mattermost::NoSessionError
         ensure
           destroy

lib/microsoft_teams/notifier.rb

@@ -20,7 +20,7 @@ module MicrosoftTeams
 
         result = true if response
       rescue Gitlab::HTTP::Error, StandardError => error
-        Rails.logger.info("#{self.class.name}: Error while connecting to #{@webhook}: #{error.message}")
+        Rails.logger.info("#{self.class.name}: Error while connecting to #{@webhook}: #{error.message}") # rubocop:disable Gitlab/RailsLogger
       end
 
       result

lib/rspec_flaky/listener.rb

@@ -32,6 +32,7 @@ module RspecFlaky
       flaky_examples[current_example.uid] = flaky_example
     end
 
+    # rubocop:disable Gitlab/RailsLogger
     def dump_summary(_)
       RspecFlaky::Report.new(flaky_examples).write(RspecFlaky::Config.flaky_examples_report_path)
       # write_report_file(flaky_examples, RspecFlaky::Config.flaky_examples_report_path)
@@ -45,6 +46,7 @@ module RspecFlaky
         # write_report_file(new_flaky_examples, RspecFlaky::Config.new_flaky_examples_report_path)
       end
     end
+    # rubocop:enable Gitlab/RailsLogger
 
     private
 

lib/tasks/gitlab/cleanup.rake

@@ -147,6 +147,7 @@ namespace :gitlab do
       ENV['NICENESS'].presence
     end
 
+    # rubocop:disable Gitlab/RailsLogger
     def logger
       return @logger if defined?(@logger)
 
@@ -159,5 +160,6 @@ namespace :gitlab do
                   Rails.logger
                 end
     end
+    # rubocop:enable Gitlab/RailsLogger
   end
 end

rubocop/cop/gitlab/rails_logger.rb

+# frozen_string_literal: true
+
+require_relative '../../code_reuse_helpers'
+
+module RuboCop
+  module Cop
+    module Gitlab
+      class RailsLogger < ::RuboCop::Cop::Cop
+        include CodeReuseHelpers
+
+        # This cop checks for the Rails.logger in the codebase
+        #
+        # @example
+        #
+        #   # bad
+        #   Rails.logger.error("Project #{project.full_path} could not be saved")
+        #
+        #   # good
+        #   Gitlab::AppLogger.error("Project %{project_path} could not be saved" % { project_path: project.full_path })
+        MSG = 'Use a structured JSON logger instead of `Rails.logger`. ' \
+          'https://docs.gitlab.com/ee/development/logging.html'.freeze
+
+        def_node_matcher :rails_logger?, <<~PATTERN
+          (send (const nil? :Rails) :logger ... )
+        PATTERN
+
+        WHITELISTED_DIRECTORIES = %w[
+          spec
+        ].freeze
+
+        def on_send(node)
+          return if in_whitelisted_directory?(node)
+          return unless rails_logger?(node)
+
+          add_offense(node, location: :expression)
+        end
+
+        def in_whitelisted_directory?(node)
+          path = file_path_for_node(node)
+
+          WHITELISTED_DIRECTORIES.any? do |directory|
+            path.start_with?(
+              File.join(rails_root, directory),
+              File.join(rails_root, 'ee', directory)
+            )
+          end
+        end
+      end
+    end
+  end
+end

rubocop/rubocop.rb

@@ -3,6 +3,7 @@ require_relative 'cop/gitlab/predicate_memoization'
 require_relative 'cop/gitlab/httparty'
 require_relative 'cop/gitlab/finder_with_find_by'
 require_relative 'cop/gitlab/union'
+require_relative 'cop/gitlab/rails_logger'
 require_relative 'cop/include_action_view_context'
 require_relative 'cop/include_sidekiq_worker'
 require_relative 'cop/safe_params'