Merge branch 'master' into build-chunks-on-object-storage

113 files changed, 320 insertions, 30 deletions

diff --git a/app/workers/admin_email_worker.rb b/app/workers/admin_email_worker.rb
index 044e470141e..06324575ffc 100644
--- a/app/workers/admin_email_worker.rb
+++ b/app/workers/admin_email_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class AdminEmailWorker
   include ApplicationWorker
   include CronjobQueue
diff --git a/app/workers/all_queues.yml b/app/workers/all_queues.yml
index 30b6796a7d6..d06f51b1828 100644
--- a/app/workers/all_queues.yml
+++ b/app/workers/all_queues.yml
@@ -11,7 +11,7 @@
 - cronjob:remove_old_web_hook_logs
 - cronjob:remove_unreferenced_lfs_objects
 - cronjob:repository_archive_cache
-- cronjob:repository_check_batch
+- cronjob:repository_check_dispatch
 - cronjob:requests_profiles
 - cronjob:schedule_update_user_activity
 - cronjob:stuck_ci_jobs
@@ -71,6 +71,7 @@
 - pipeline_processing:update_head_pipeline_for_merge_request
 
 - repository_check:repository_check_clear
+- repository_check:repository_check_batch
 - repository_check:repository_check_single_repository
 
 - default
@@ -118,3 +119,4 @@
 - web_hook
 - repository_update_remote_mirror
 - create_note_diff_file
+- delete_diff_files
diff --git a/app/workers/archive_trace_worker.rb b/app/workers/archive_trace_worker.rb
index dea7425ad88..9169f21af2a 100644
--- a/app/workers/archive_trace_worker.rb
+++ b/app/workers/archive_trace_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ArchiveTraceWorker
   include ApplicationWorker
   include PipelineBackgroundQueue
diff --git a/app/workers/authorized_projects_worker.rb b/app/workers/authorized_projects_worker.rb
index 8fe3619f6ee..dd62bb0f33d 100644
--- a/app/workers/authorized_projects_worker.rb
+++ b/app/workers/authorized_projects_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class AuthorizedProjectsWorker
   include ApplicationWorker
   prepend WaitableWorker
diff --git a/app/workers/background_migration_worker.rb b/app/workers/background_migration_worker.rb
index 376703f6319..eaec7d48f35 100644
--- a/app/workers/background_migration_worker.rb
+++ b/app/workers/background_migration_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class BackgroundMigrationWorker
   include ApplicationWorker
 
diff --git a/app/workers/build_coverage_worker.rb b/app/workers/build_coverage_worker.rb
index 62b212c79be..53d77dc4524 100644
--- a/app/workers/build_coverage_worker.rb
+++ b/app/workers/build_coverage_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class BuildCoverageWorker
   include ApplicationWorker
   include PipelineQueue
diff --git a/app/workers/build_finished_worker.rb b/app/workers/build_finished_worker.rb
index 46f1ac09915..9dc2c7f3601 100644
--- a/app/workers/build_finished_worker.rb
+++ b/app/workers/build_finished_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class BuildFinishedWorker
   include ApplicationWorker
   include PipelineQueue
diff --git a/app/workers/build_hooks_worker.rb b/app/workers/build_hooks_worker.rb
index cbfca8c342c..f1f71dc589c 100644
--- a/app/workers/build_hooks_worker.rb
+++ b/app/workers/build_hooks_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class BuildHooksWorker
   include ApplicationWorker
   include PipelineQueue
diff --git a/app/workers/build_queue_worker.rb b/app/workers/build_queue_worker.rb
index e4f4e6c1d9e..1b3f1fd3c2a 100644
--- a/app/workers/build_queue_worker.rb
+++ b/app/workers/build_queue_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class BuildQueueWorker
   include ApplicationWorker
   include PipelineQueue
diff --git a/app/workers/build_success_worker.rb b/app/workers/build_success_worker.rb
index 4b9097bc5e4..e1c1cc24a94 100644
--- a/app/workers/build_success_worker.rb
+++ b/app/workers/build_success_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class BuildSuccessWorker
   include ApplicationWorker
   include PipelineQueue
diff --git a/app/workers/build_trace_sections_worker.rb b/app/workers/build_trace_sections_worker.rb
index c0f5c144e10..f4114b3353c 100644
--- a/app/workers/build_trace_sections_worker.rb
+++ b/app/workers/build_trace_sections_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class BuildTraceSectionsWorker
   include ApplicationWorker
   include PipelineQueue
diff --git a/app/workers/ci/archive_traces_cron_worker.rb b/app/workers/ci/archive_traces_cron_worker.rb
index 2ac65f41f4e..7016edde698 100644
--- a/app/workers/ci/archive_traces_cron_worker.rb
+++ b/app/workers/ci/archive_traces_cron_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Ci
   class ArchiveTracesCronWorker
     include ApplicationWorker
diff --git a/app/workers/ci/build_trace_chunk_flush_worker.rb b/app/workers/ci/build_trace_chunk_flush_worker.rb
index 49ff0f4ab94..9dbf2e5e1ac 100644
--- a/app/workers/ci/build_trace_chunk_flush_worker.rb
+++ b/app/workers/ci/build_trace_chunk_flush_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Ci
   class BuildTraceChunkFlushWorker
     include ApplicationWorker
diff --git a/app/workers/cluster_install_app_worker.rb b/app/workers/cluster_install_app_worker.rb
index f771cb4939f..32e2ea7996c 100644
--- a/app/workers/cluster_install_app_worker.rb
+++ b/app/workers/cluster_install_app_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ClusterInstallAppWorker
   include ApplicationWorker
   include ClusterQueue
diff --git a/app/workers/cluster_provision_worker.rb b/app/workers/cluster_provision_worker.rb
index 1ab4de3b647..59de7903c1c 100644
--- a/app/workers/cluster_provision_worker.rb
+++ b/app/workers/cluster_provision_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ClusterProvisionWorker
   include ApplicationWorker
   include ClusterQueue
diff --git a/app/workers/cluster_wait_for_app_installation_worker.rb b/app/workers/cluster_wait_for_app_installation_worker.rb
index d564d5e48bf..e8d7e52f70f 100644
--- a/app/workers/cluster_wait_for_app_installation_worker.rb
+++ b/app/workers/cluster_wait_for_app_installation_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ClusterWaitForAppInstallationWorker
   include ApplicationWorker
   include ClusterQueue
diff --git a/app/workers/cluster_wait_for_ingress_ip_address_worker.rb b/app/workers/cluster_wait_for_ingress_ip_address_worker.rb
index 8ba5951750c..6865384df44 100644
--- a/app/workers/cluster_wait_for_ingress_ip_address_worker.rb
+++ b/app/workers/cluster_wait_for_ingress_ip_address_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ClusterWaitForIngressIpAddressWorker
   include ApplicationWorker
   include ClusterQueue
diff --git a/app/workers/concerns/application_worker.rb b/app/workers/concerns/application_worker.rb
index 37586e161c9..bb06e31641d 100644
--- a/app/workers/concerns/application_worker.rb
+++ b/app/workers/concerns/application_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 Sidekiq::Worker.extend ActiveSupport::Concern
 
 module ApplicationWorker
diff --git a/app/workers/concerns/cluster_applications.rb b/app/workers/concerns/cluster_applications.rb
index 24ecaa0b52f..9758a1ceb0e 100644
--- a/app/workers/concerns/cluster_applications.rb
+++ b/app/workers/concerns/cluster_applications.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module ClusterApplications
   extend ActiveSupport::Concern
 
diff --git a/app/workers/concerns/cluster_queue.rb b/app/workers/concerns/cluster_queue.rb
index 24b9f145220..e44b40c36c9 100644
--- a/app/workers/concerns/cluster_queue.rb
+++ b/app/workers/concerns/cluster_queue.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 ##
 # Concern for setting Sidekiq settings for the various Gcp clusters workers.
 #
diff --git a/app/workers/concerns/cronjob_queue.rb b/app/workers/concerns/cronjob_queue.rb
index b6581779f6a..0683b229381 100644
--- a/app/workers/concerns/cronjob_queue.rb
+++ b/app/workers/concerns/cronjob_queue.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Concern that sets various Sidekiq settings for workers executed using a
 # cronjob.
 module CronjobQueue
diff --git a/app/workers/concerns/each_shard_worker.rb b/app/workers/concerns/each_shard_worker.rb
new file mode 100644
index 00000000000..d0a728fb495
--- /dev/null
+++ b/app/workers/concerns/each_shard_worker.rb
@@ -0,0 +1,31 @@
+module EachShardWorker
+  extend ActiveSupport::Concern
+  include ::Gitlab::Utils::StrongMemoize
+
+  def each_eligible_shard
+    Gitlab::ShardHealthCache.update(eligible_shard_names)
+
+    eligible_shard_names.each do |shard_name|
+      yield shard_name
+    end
+  end
+
+  # override when you want to filter out some shards
+  def eligible_shard_names
+    healthy_shard_names
+  end
+
+  def healthy_shard_names
+    strong_memoize(:healthy_shard_names) do
+      healthy_ready_shards.map { |result| result.labels[:shard] }
+    end
+  end
+
+  def healthy_ready_shards
+    ready_shards.select(&:success)
+  end
+
+  def ready_shards
+    Gitlab::HealthChecks::GitalyCheck.readiness
+  end
+end
diff --git a/app/workers/concerns/exception_backtrace.rb b/app/workers/concerns/exception_backtrace.rb
index ea0f1f8d19b..37c9eaba0d7 100644
--- a/app/workers/concerns/exception_backtrace.rb
+++ b/app/workers/concerns/exception_backtrace.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Concern for enabling a few lines of exception backtraces in Sidekiq
 module ExceptionBacktrace
   extend ActiveSupport::Concern
diff --git a/app/workers/concerns/gitlab/github_import/queue.rb b/app/workers/concerns/gitlab/github_import/queue.rb
index 22c2ce458e8..59b621f16ab 100644
--- a/app/workers/concerns/gitlab/github_import/queue.rb
+++ b/app/workers/concerns/gitlab/github_import/queue.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Gitlab
   module GithubImport
     module Queue
diff --git a/app/workers/concerns/mail_scheduler_queue.rb b/app/workers/concerns/mail_scheduler_queue.rb
index f3e9680d756..c051151e973 100644
--- a/app/workers/concerns/mail_scheduler_queue.rb
+++ b/app/workers/concerns/mail_scheduler_queue.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module MailSchedulerQueue
   extend ActiveSupport::Concern
 
diff --git a/app/workers/concerns/new_issuable.rb b/app/workers/concerns/new_issuable.rb
index 526ed0bad07..7735dec5e6b 100644
--- a/app/workers/concerns/new_issuable.rb
+++ b/app/workers/concerns/new_issuable.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module NewIssuable
   attr_reader :issuable, :user
 
diff --git a/app/workers/concerns/object_storage_queue.rb b/app/workers/concerns/object_storage_queue.rb
index a80f473a6d4..8650eed213a 100644
--- a/app/workers/concerns/object_storage_queue.rb
+++ b/app/workers/concerns/object_storage_queue.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Concern for setting Sidekiq settings for the various GitLab ObjectStorage workers.
 module ObjectStorageQueue
   extend ActiveSupport::Concern
diff --git a/app/workers/concerns/pipeline_background_queue.rb b/app/workers/concerns/pipeline_background_queue.rb
index 8bf43de6b26..bbb8ad0c982 100644
--- a/app/workers/concerns/pipeline_background_queue.rb
+++ b/app/workers/concerns/pipeline_background_queue.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 ##
 # Concern for setting Sidekiq settings for the low priority CI pipeline workers.
 #
diff --git a/app/workers/concerns/pipeline_queue.rb b/app/workers/concerns/pipeline_queue.rb
index e77093a6902..3aaed4669e5 100644
--- a/app/workers/concerns/pipeline_queue.rb
+++ b/app/workers/concerns/pipeline_queue.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 ##
 # Concern for setting Sidekiq settings for the various CI pipeline workers.
 #
diff --git a/app/workers/concerns/project_import_options.rb b/app/workers/concerns/project_import_options.rb
index ef23990ad97..22bdf441d6b 100644
--- a/app/workers/concerns/project_import_options.rb
+++ b/app/workers/concerns/project_import_options.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module ProjectImportOptions
   extend ActiveSupport::Concern
 
diff --git a/app/workers/concerns/project_start_import.rb b/app/workers/concerns/project_start_import.rb
index 4e55a1ee3d6..46a133db2a1 100644
--- a/app/workers/concerns/project_start_import.rb
+++ b/app/workers/concerns/project_start_import.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Used in EE by mirroring
 module ProjectStartImport
   def start(project)
diff --git a/app/workers/concerns/repository_check_queue.rb b/app/workers/concerns/repository_check_queue.rb
index 43fb66c31b0..216d67e5dbc 100644
--- a/app/workers/concerns/repository_check_queue.rb
+++ b/app/workers/concerns/repository_check_queue.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Concern for setting Sidekiq settings for the various repository check workers.
 module RepositoryCheckQueue
   extend ActiveSupport::Concern
diff --git a/app/workers/concerns/waitable_worker.rb b/app/workers/concerns/waitable_worker.rb
index 48ebe862248..d85bc7d1660 100644
--- a/app/workers/concerns/waitable_worker.rb
+++ b/app/workers/concerns/waitable_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module WaitableWorker
   extend ActiveSupport::Concern
 
diff --git a/app/workers/create_gpg_signature_worker.rb b/app/workers/create_gpg_signature_worker.rb
index f371731f68c..a2da1bda11f 100644
--- a/app/workers/create_gpg_signature_worker.rb
+++ b/app/workers/create_gpg_signature_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class CreateGpgSignatureWorker
   include ApplicationWorker
 
diff --git a/app/workers/create_note_diff_file_worker.rb b/app/workers/create_note_diff_file_worker.rb
index 624b638a24e..0850250f7e3 100644
--- a/app/workers/create_note_diff_file_worker.rb
+++ b/app/workers/create_note_diff_file_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class CreateNoteDiffFileWorker
   include ApplicationWorker
 
diff --git a/app/workers/create_pipeline_worker.rb b/app/workers/create_pipeline_worker.rb
index c3ac35e54f5..037b4a57d4b 100644
--- a/app/workers/create_pipeline_worker.rb
+++ b/app/workers/create_pipeline_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class CreatePipelineWorker
   include ApplicationWorker
   include PipelineQueue
diff --git a/app/workers/delete_diff_files_worker.rb b/app/workers/delete_diff_files_worker.rb
new file mode 100644
index 00000000000..bb8fbb9c373
--- /dev/null
+++ b/app/workers/delete_diff_files_worker.rb
@@ -0,0 +1,17 @@
+class DeleteDiffFilesWorker
+  include ApplicationWorker
+
+  def perform(merge_request_diff_id)
+    merge_request_diff = MergeRequestDiff.find(merge_request_diff_id)
+
+    return if merge_request_diff.without_files?
+
+    MergeRequestDiff.transaction do
+      merge_request_diff.clean!
+
+      MergeRequestDiffFile
+        .where(merge_request_diff_id: merge_request_diff.id)
+        .delete_all
+    end
+  end
+end
diff --git a/app/workers/delete_merged_branches_worker.rb b/app/workers/delete_merged_branches_worker.rb
index 07cd1f02fb5..017d7fd1cb0 100644
--- a/app/workers/delete_merged_branches_worker.rb
+++ b/app/workers/delete_merged_branches_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class DeleteMergedBranchesWorker
   include ApplicationWorker
 
diff --git a/app/workers/delete_user_worker.rb b/app/workers/delete_user_worker.rb
index 6c431b02979..4d0295f8d2e 100644
--- a/app/workers/delete_user_worker.rb
+++ b/app/workers/delete_user_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class DeleteUserWorker
   include ApplicationWorker
 
diff --git a/app/workers/email_receiver_worker.rb b/app/workers/email_receiver_worker.rb
index dd8a6cbbef1..f9f0efb302a 100644
--- a/app/workers/email_receiver_worker.rb
+++ b/app/workers/email_receiver_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class EmailReceiverWorker
   include ApplicationWorker
 
diff --git a/app/workers/emails_on_push_worker.rb b/app/workers/emails_on_push_worker.rb
index 2a4d65b5cb3..8d0cfc73ccd 100644
--- a/app/workers/emails_on_push_worker.rb
+++ b/app/workers/emails_on_push_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class EmailsOnPushWorker
   include ApplicationWorker
 
diff --git a/app/workers/expire_build_artifacts_worker.rb b/app/workers/expire_build_artifacts_worker.rb
index 87e5dca01fd..5d3a9a39b93 100644
--- a/app/workers/expire_build_artifacts_worker.rb
+++ b/app/workers/expire_build_artifacts_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ExpireBuildArtifactsWorker
   include ApplicationWorker
   include CronjobQueue
diff --git a/app/workers/expire_build_instance_artifacts_worker.rb b/app/workers/expire_build_instance_artifacts_worker.rb
index 234b4357cf7..3b57ecb36e3 100644
--- a/app/workers/expire_build_instance_artifacts_worker.rb
+++ b/app/workers/expire_build_instance_artifacts_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ExpireBuildInstanceArtifactsWorker
   include ApplicationWorker
 
diff --git a/app/workers/expire_job_cache_worker.rb b/app/workers/expire_job_cache_worker.rb
index 7217364a9f2..14a57b90114 100644
--- a/app/workers/expire_job_cache_worker.rb
+++ b/app/workers/expire_job_cache_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ExpireJobCacheWorker
   include ApplicationWorker
   include PipelineQueue
diff --git a/app/workers/expire_pipeline_cache_worker.rb b/app/workers/expire_pipeline_cache_worker.rb
index db73d37868a..992fc63c451 100644
--- a/app/workers/expire_pipeline_cache_worker.rb
+++ b/app/workers/expire_pipeline_cache_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ExpirePipelineCacheWorker
   include ApplicationWorker
   include PipelineQueue
diff --git a/app/workers/git_garbage_collect_worker.rb b/app/workers/git_garbage_collect_worker.rb
index ae5c5fac834..fd49bc18161 100644
--- a/app/workers/git_garbage_collect_worker.rb
+++ b/app/workers/git_garbage_collect_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class GitGarbageCollectWorker
   include ApplicationWorker
 
diff --git a/app/workers/gitlab_shell_worker.rb b/app/workers/gitlab_shell_worker.rb
index a0028e41332..0e4d40acc5c 100644
--- a/app/workers/gitlab_shell_worker.rb
+++ b/app/workers/gitlab_shell_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class GitlabShellWorker
   include ApplicationWorker
   include Gitlab::ShellAdapter
diff --git a/app/workers/gitlab_usage_ping_worker.rb b/app/workers/gitlab_usage_ping_worker.rb
index 6dd281b1147..b75e724ca98 100644
--- a/app/workers/gitlab_usage_ping_worker.rb
+++ b/app/workers/gitlab_usage_ping_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class GitlabUsagePingWorker
   LEASE_TIMEOUT = 86400
 
diff --git a/app/workers/group_destroy_worker.rb b/app/workers/group_destroy_worker.rb
index 509bd09dc2e..b4a3ddcae51 100644
--- a/app/workers/group_destroy_worker.rb
+++ b/app/workers/group_destroy_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class GroupDestroyWorker
   include ApplicationWorker
   include ExceptionBacktrace
diff --git a/app/workers/import_export_project_cleanup_worker.rb b/app/workers/import_export_project_cleanup_worker.rb
index 9788c8df3a3..da3debdeede 100644
--- a/app/workers/import_export_project_cleanup_worker.rb
+++ b/app/workers/import_export_project_cleanup_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ImportExportProjectCleanupWorker
   include ApplicationWorker
   include CronjobQueue
diff --git a/app/workers/invalid_gpg_signature_update_worker.rb b/app/workers/invalid_gpg_signature_update_worker.rb
index 6774ab307c6..4724ab7ad98 100644
--- a/app/workers/invalid_gpg_signature_update_worker.rb
+++ b/app/workers/invalid_gpg_signature_update_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class InvalidGpgSignatureUpdateWorker
   include ApplicationWorker
 
diff --git a/app/workers/irker_worker.rb b/app/workers/irker_worker.rb
index 9ae5456be4c..29631c6b7ac 100644
--- a/app/workers/irker_worker.rb
+++ b/app/workers/irker_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'json'
 require 'socket'
 
@@ -69,8 +71,8 @@ class IrkerWorker
     newbranch = "#{Gitlab.config.gitlab.url}/#{repo_path}/branches"
     newbranch = "\x0302\x1f#{newbranch}\x0f" if @colors
 
-    privmsg = "[#{repo_name}] #{committer} has created a new branch "
-    privmsg += "#{branch}: #{newbranch}"
+    privmsg = "[#{repo_name}] #{committer} has created a new branch " \
+              "#{branch}: #{newbranch}"
     sendtoirker privmsg
   end
 
@@ -112,9 +114,7 @@ class IrkerWorker
     url = compare_url data, project.full_path
     commits = colorize_commits data['total_commits_count']
 
-    new_commits = 'new commit'
-    new_commits += 's' if data['total_commits_count'] > 1
-
+    new_commits = 'new commit'.pluralize(data['total_commits_count'])
     sendtoirker "[#{repo}] #{committer} pushed #{commits} #{new_commits} " \
                 "to #{branch}: #{url}"
   end
@@ -122,8 +122,8 @@ class IrkerWorker
   def compare_url(data, repo_path)
     sha1 = Commit.truncate_sha(data['before'])
     sha2 = Commit.truncate_sha(data['after'])
-    compare_url = "#{Gitlab.config.gitlab.url}/#{repo_path}/compare"
-    compare_url += "/#{sha1}...#{sha2}"
+    compare_url = "#{Gitlab.config.gitlab.url}/#{repo_path}/compare" \
+                  "/#{sha1}...#{sha2}"
     colorize_url compare_url
   end
 
@@ -144,8 +144,7 @@ class IrkerWorker
   def files_count(commit)
     diff_size = commit.raw_deltas.size
 
-    files = "#{diff_size} file"
-    files += 's' if diff_size > 1
+    files = "#{diff_size} file".pluralize(diff_size)
     files
   end
 
diff --git a/app/workers/issue_due_scheduler_worker.rb b/app/workers/issue_due_scheduler_worker.rb
index 16ab5d069e0..c04a2d75e0b 100644
--- a/app/workers/issue_due_scheduler_worker.rb
+++ b/app/workers/issue_due_scheduler_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class IssueDueSchedulerWorker
   include ApplicationWorker
   include CronjobQueue
diff --git a/app/workers/mail_scheduler/issue_due_worker.rb b/app/workers/mail_scheduler/issue_due_worker.rb
index 54285884a52..8794ad7a82c 100644
--- a/app/workers/mail_scheduler/issue_due_worker.rb
+++ b/app/workers/mail_scheduler/issue_due_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module MailScheduler
   class IssueDueWorker
     include ApplicationWorker
diff --git a/app/workers/mail_scheduler/notification_service_worker.rb b/app/workers/mail_scheduler/notification_service_worker.rb
index 7cfe0aa0df1..4726e416182 100644
--- a/app/workers/mail_scheduler/notification_service_worker.rb
+++ b/app/workers/mail_scheduler/notification_service_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'active_job/arguments'
 
 module MailScheduler
diff --git a/app/workers/merge_worker.rb b/app/workers/merge_worker.rb
index ba832fe30c6..ee864b733cd 100644
--- a/app/workers/merge_worker.rb
+++ b/app/workers/merge_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class MergeWorker
   include ApplicationWorker
 
diff --git a/app/workers/namespaceless_project_destroy_worker.rb b/app/workers/namespaceless_project_destroy_worker.rb
index adb25c2a170..d9df42c9e17 100644
--- a/app/workers/namespaceless_project_destroy_worker.rb
+++ b/app/workers/namespaceless_project_destroy_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Worker to destroy projects that do not have a namespace
 #
 # It destroys everything it can without having the info about the namespace it
diff --git a/app/workers/new_issue_worker.rb b/app/workers/new_issue_worker.rb
index 3bc030f9c62..85b53973f56 100644
--- a/app/workers/new_issue_worker.rb
+++ b/app/workers/new_issue_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class NewIssueWorker
   include ApplicationWorker
   include NewIssuable
diff --git a/app/workers/new_merge_request_worker.rb b/app/workers/new_merge_request_worker.rb
index bda2a0ab59d..5d8b8904502 100644
--- a/app/workers/new_merge_request_worker.rb
+++ b/app/workers/new_merge_request_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class NewMergeRequestWorker
   include ApplicationWorker
   include NewIssuable
diff --git a/app/workers/new_note_worker.rb b/app/workers/new_note_worker.rb
index 67c54fbf10e..74f34dcf9aa 100644
--- a/app/workers/new_note_worker.rb
+++ b/app/workers/new_note_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class NewNoteWorker
   include ApplicationWorker
 
diff --git a/app/workers/object_storage/background_move_worker.rb b/app/workers/object_storage/background_move_worker.rb
index 9c4d72e0ecf..8dff65e46e3 100644
--- a/app/workers/object_storage/background_move_worker.rb
+++ b/app/workers/object_storage/background_move_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module ObjectStorage
   class BackgroundMoveWorker
     include ApplicationWorker
diff --git a/app/workers/object_storage_upload_worker.rb b/app/workers/object_storage_upload_worker.rb
index 5c80f34069c..f17980a83d8 100644
--- a/app/workers/object_storage_upload_worker.rb
+++ b/app/workers/object_storage_upload_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # @Deprecated - remove once the `object_storage_upload` queue is empty
 # The queue has been renamed `object_storage:object_storage_background_upload`
 #
diff --git a/app/workers/pages_domain_verification_cron_worker.rb b/app/workers/pages_domain_verification_cron_worker.rb
index a3ff4bd2101..92d62a15aee 100644
--- a/app/workers/pages_domain_verification_cron_worker.rb
+++ b/app/workers/pages_domain_verification_cron_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class PagesDomainVerificationCronWorker
   include ApplicationWorker
   include CronjobQueue
diff --git a/app/workers/pages_domain_verification_worker.rb b/app/workers/pages_domain_verification_worker.rb
index 2e93489113c..4610b688189 100644
--- a/app/workers/pages_domain_verification_worker.rb
+++ b/app/workers/pages_domain_verification_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class PagesDomainVerificationWorker
   include ApplicationWorker
 
diff --git a/app/workers/pages_worker.rb b/app/workers/pages_worker.rb
index 66a0ff83bef..13a6576a301 100644
--- a/app/workers/pages_worker.rb
+++ b/app/workers/pages_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class PagesWorker
   include ApplicationWorker
 
diff --git a/app/workers/pipeline_hooks_worker.rb b/app/workers/pipeline_hooks_worker.rb
index c94918ff4ee..58023e0af1b 100644
--- a/app/workers/pipeline_hooks_worker.rb
+++ b/app/workers/pipeline_hooks_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class PipelineHooksWorker
   include ApplicationWorker
   include PipelineQueue
diff --git a/app/workers/pipeline_metrics_worker.rb b/app/workers/pipeline_metrics_worker.rb
index d46d1f122fc..a97019b100a 100644
--- a/app/workers/pipeline_metrics_worker.rb
+++ b/app/workers/pipeline_metrics_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class PipelineMetricsWorker
   include ApplicationWorker
   include PipelineQueue
diff --git a/app/workers/pipeline_notification_worker.rb b/app/workers/pipeline_notification_worker.rb
index a9a1168a6e3..3a8846b3747 100644
--- a/app/workers/pipeline_notification_worker.rb
+++ b/app/workers/pipeline_notification_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class PipelineNotificationWorker
   include ApplicationWorker
   include PipelineQueue
diff --git a/app/workers/pipeline_process_worker.rb b/app/workers/pipeline_process_worker.rb
index 24424b3f472..83744c5338a 100644
--- a/app/workers/pipeline_process_worker.rb
+++ b/app/workers/pipeline_process_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class PipelineProcessWorker
   include ApplicationWorker
   include PipelineQueue
diff --git a/app/workers/pipeline_schedule_worker.rb b/app/workers/pipeline_schedule_worker.rb
index c49758878a4..a1815757735 100644
--- a/app/workers/pipeline_schedule_worker.rb
+++ b/app/workers/pipeline_schedule_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class PipelineScheduleWorker
   include ApplicationWorker
   include CronjobQueue
diff --git a/app/workers/pipeline_success_worker.rb b/app/workers/pipeline_success_worker.rb
index 2ab0739a17f..68e9af6a619 100644
--- a/app/workers/pipeline_success_worker.rb
+++ b/app/workers/pipeline_success_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class PipelineSuccessWorker
   include ApplicationWorker
   include PipelineQueue
diff --git a/app/workers/pipeline_update_worker.rb b/app/workers/pipeline_update_worker.rb
index fc9da2d45b1..c33468c1f14 100644
--- a/app/workers/pipeline_update_worker.rb
+++ b/app/workers/pipeline_update_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class PipelineUpdateWorker
   include ApplicationWorker
   include PipelineQueue
diff --git a/app/workers/plugin_worker.rb b/app/workers/plugin_worker.rb
index bfcc683d99a..c293e28be4a 100644
--- a/app/workers/plugin_worker.rb
+++ b/app/workers/plugin_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class PluginWorker
   include ApplicationWorker
 
diff --git a/app/workers/post_receive.rb b/app/workers/post_receive.rb
index f88b3fdbfb1..09a594cdb4e 100644
--- a/app/workers/post_receive.rb
+++ b/app/workers/post_receive.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class PostReceive
   include ApplicationWorker
 
diff --git a/app/workers/process_commit_worker.rb b/app/workers/process_commit_worker.rb
index 201e7f332b4..ed39b4a1ea8 100644
--- a/app/workers/process_commit_worker.rb
+++ b/app/workers/process_commit_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Worker for processing individiual commit messages pushed to a repository.
 #
 # Jobs for this worker are scheduled for every commit that is being pushed. As a
diff --git a/app/workers/project_cache_worker.rb b/app/workers/project_cache_worker.rb
index a993b4b2680..abe86066fb4 100644
--- a/app/workers/project_cache_worker.rb
+++ b/app/workers/project_cache_worker.rb
@@ -1,6 +1,9 @@
+# frozen_string_literal: true
+
 # Worker for updating any project specific caches.
 class ProjectCacheWorker
   include ApplicationWorker
+  include ExclusiveLeaseGuard
 
   LEASE_TIMEOUT = 15.minutes.to_i
 
@@ -11,30 +14,30 @@ class ProjectCacheWorker
   # statistics - An Array containing columns from ProjectStatistics to
   #              refresh, if empty all columns will be refreshed
   def perform(project_id, files = [], statistics = [])
-    project = Project.find_by(id: project_id)
-
-    return unless project && project.repository.exists?
+    @project = Project.find_by(id: project_id)
+    return unless @project&.repository&.exists?
 
-    update_statistics(project, statistics.map(&:to_sym))
+    update_statistics(statistics)
 
-    project.repository.refresh_method_caches(files.map(&:to_sym))
+    @project.repository.refresh_method_caches(files.map(&:to_sym))
 
-    project.cleanup
+    @project.cleanup
   end
 
-  def update_statistics(project, statistics = [])
-    return unless try_obtain_lease_for(project.id, :update_statistics)
-
-    Rails.logger.info("Updating statistics for project #{project.id}")
+  private
 
-    project.statistics.refresh!(only: statistics)
+  def update_statistics(statistics = [])
+    try_obtain_lease do
+      Rails.logger.info("Updating statistics for project #{@project.id}")
+      @project.statistics.refresh!(only: statistics.to_a.map(&:to_sym))
+    end
   end
 
-  private
+  def lease_timeout
+    LEASE_TIMEOUT
+  end
 
-  def try_obtain_lease_for(project_id, section)
-    Gitlab::ExclusiveLease
-      .new("project_cache_worker:#{project_id}:#{section}", timeout: LEASE_TIMEOUT)
-      .try_obtain
+  def lease_key
+    "project_cache_worker:#{@project.id}:update_statistics"
   end
 end
diff --git a/app/workers/project_destroy_worker.rb b/app/workers/project_destroy_worker.rb
index 1ba854ca4cb..4447e867240 100644
--- a/app/workers/project_destroy_worker.rb
+++ b/app/workers/project_destroy_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ProjectDestroyWorker
   include ApplicationWorker
   include ExceptionBacktrace
diff --git a/app/workers/project_export_worker.rb b/app/workers/project_export_worker.rb
index c3d84bb0b93..ed9da39c7c3 100644
--- a/app/workers/project_export_worker.rb
+++ b/app/workers/project_export_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ProjectExportWorker
   include ApplicationWorker
   include ExceptionBacktrace
diff --git a/app/workers/project_migrate_hashed_storage_worker.rb b/app/workers/project_migrate_hashed_storage_worker.rb
index d01eb744e5d..9e4d66250a4 100644
--- a/app/workers/project_migrate_hashed_storage_worker.rb
+++ b/app/workers/project_migrate_hashed_storage_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ProjectMigrateHashedStorageWorker
   include ApplicationWorker
 
diff --git a/app/workers/project_service_worker.rb b/app/workers/project_service_worker.rb
index 75c4b8b3663..a0bc9288cf0 100644
--- a/app/workers/project_service_worker.rb
+++ b/app/workers/project_service_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ProjectServiceWorker
   include ApplicationWorker
 
diff --git a/app/workers/propagate_service_template_worker.rb b/app/workers/propagate_service_template_worker.rb
index 635a97c99af..c9da1cae255 100644
--- a/app/workers/propagate_service_template_worker.rb
+++ b/app/workers/propagate_service_template_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Worker for updating any project specific caches.
 class PropagateServiceTemplateWorker
   include ApplicationWorker
diff --git a/app/workers/prune_old_events_worker.rb b/app/workers/prune_old_events_worker.rb
index 5ff62ab1369..c1d05ebbcfd 100644
--- a/app/workers/prune_old_events_worker.rb
+++ b/app/workers/prune_old_events_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class PruneOldEventsWorker
   include ApplicationWorker
   include CronjobQueue
diff --git a/app/workers/reactive_caching_worker.rb b/app/workers/reactive_caching_worker.rb
index ef3ddb9024b..9b331f15dc5 100644
--- a/app/workers/reactive_caching_worker.rb
+++ b/app/workers/reactive_caching_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ReactiveCachingWorker
   include ApplicationWorker
 
diff --git a/app/workers/rebase_worker.rb b/app/workers/rebase_worker.rb
index 090987778a2..a6baebc1443 100644
--- a/app/workers/rebase_worker.rb
+++ b/app/workers/rebase_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class RebaseWorker
   include ApplicationWorker
 
diff --git a/app/workers/remove_expired_group_links_worker.rb b/app/workers/remove_expired_group_links_worker.rb
index 7e64c3070a8..6b8b972a440 100644
--- a/app/workers/remove_expired_group_links_worker.rb
+++ b/app/workers/remove_expired_group_links_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class RemoveExpiredGroupLinksWorker
   include ApplicationWorker
   include CronjobQueue
diff --git a/app/workers/remove_expired_members_worker.rb b/app/workers/remove_expired_members_worker.rb
index 68960f72bf6..41913900571 100644
--- a/app/workers/remove_expired_members_worker.rb
+++ b/app/workers/remove_expired_members_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class RemoveExpiredMembersWorker
   include ApplicationWorker
   include CronjobQueue
diff --git a/app/workers/remove_old_web_hook_logs_worker.rb b/app/workers/remove_old_web_hook_logs_worker.rb
index 87fed42d7ce..17140ac4450 100644
--- a/app/workers/remove_old_web_hook_logs_worker.rb
+++ b/app/workers/remove_old_web_hook_logs_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class RemoveOldWebHookLogsWorker
   include ApplicationWorker
   include CronjobQueue
diff --git a/app/workers/remove_unreferenced_lfs_objects_worker.rb b/app/workers/remove_unreferenced_lfs_objects_worker.rb
index 8daf079fc31..95e7a9f537f 100644
--- a/app/workers/remove_unreferenced_lfs_objects_worker.rb
+++ b/app/workers/remove_unreferenced_lfs_objects_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class RemoveUnreferencedLfsObjectsWorker
   include ApplicationWorker
   include CronjobQueue
diff --git a/app/workers/repository_archive_cache_worker.rb b/app/workers/repository_archive_cache_worker.rb
index 86a258cf94f..c1dff8ced90 100644
--- a/app/workers/repository_archive_cache_worker.rb
+++ b/app/workers/repository_archive_cache_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class RepositoryArchiveCacheWorker
   include ApplicationWorker
   include CronjobQueue
diff --git a/app/workers/repository_check/batch_worker.rb b/app/workers/repository_check/batch_worker.rb
index 72f0a9b0619..051382a08a9 100644
--- a/app/workers/repository_check/batch_worker.rb
+++ b/app/workers/repository_check/batch_worker.rb
@@ -1,13 +1,20 @@
+# frozen_string_literal: true
+
 module RepositoryCheck
   class BatchWorker
     include ApplicationWorker
-    include CronjobQueue
+    include RepositoryCheckQueue
 
     RUN_TIME = 3600
     BATCH_SIZE = 10_000
 
-    def perform
+    attr_reader :shard_name
+
+    def perform(shard_name)
+      @shard_name = shard_name
+
       return unless Gitlab::CurrentSettings.repository_checks_enabled
+      return unless Gitlab::ShardHealthCache.healthy_shard?(shard_name)
 
       start = Time.now
 
@@ -37,18 +44,22 @@ module RepositoryCheck
     end
 
     def never_checked_project_ids(batch_size)
-      Project.where(last_repository_check_at: nil)
+      projects_on_shard.where(last_repository_check_at: nil)
         .where('created_at < ?', 24.hours.ago)
         .limit(batch_size).pluck(:id)
     end
 
     def old_checked_project_ids(batch_size)
-      Project.where.not(last_repository_check_at: nil)
+      projects_on_shard.where.not(last_repository_check_at: nil)
         .where('last_repository_check_at < ?', 1.month.ago)
         .reorder(last_repository_check_at: :asc)
         .limit(batch_size).pluck(:id)
     end
 
+    def projects_on_shard
+      Project.where(repository_storage: shard_name)
+    end
+
     def try_obtain_lease(id)
       # Use a 24-hour timeout because on servers/projects where 'git fsck' is
       # super slow we definitely do not want to run it twice in parallel.
diff --git a/app/workers/repository_check/clear_worker.rb b/app/workers/repository_check/clear_worker.rb
index 97b89dc3db5..81e1a4b63bb 100644
--- a/app/workers/repository_check/clear_worker.rb
+++ b/app/workers/repository_check/clear_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module RepositoryCheck
   class ClearWorker
     include ApplicationWorker
diff --git a/app/workers/repository_check/dispatch_worker.rb b/app/workers/repository_check/dispatch_worker.rb
new file mode 100644
index 00000000000..891a273afd7
--- /dev/null
+++ b/app/workers/repository_check/dispatch_worker.rb
@@ -0,0 +1,15 @@
+module RepositoryCheck
+  class DispatchWorker
+    include ApplicationWorker
+    include CronjobQueue
+    include ::EachShardWorker
+
+    def perform
+      return unless Gitlab::CurrentSettings.repository_checks_enabled
+
+      each_eligible_shard do |shard_name|
+        RepositoryCheck::BatchWorker.perform_async(shard_name)
+      end
+    end
+  end
+end
diff --git a/app/workers/repository_check/single_repository_worker.rb b/app/workers/repository_check/single_repository_worker.rb
index 3cffb8b14e4..f44e5693b25 100644
--- a/app/workers/repository_check/single_repository_worker.rb
+++ b/app/workers/repository_check/single_repository_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module RepositoryCheck
   class SingleRepositoryWorker
     include ApplicationWorker
diff --git a/app/workers/repository_fork_worker.rb b/app/workers/repository_fork_worker.rb
index dbb215f1964..5ef9b744db3 100644
--- a/app/workers/repository_fork_worker.rb
+++ b/app/workers/repository_fork_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class RepositoryForkWorker
   include ApplicationWorker
   include Gitlab::ShellAdapter
diff --git a/app/workers/repository_import_worker.rb b/app/workers/repository_import_worker.rb
index d79b5ee5346..25fec542ac7 100644
--- a/app/workers/repository_import_worker.rb
+++ b/app/workers/repository_import_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class RepositoryImportWorker
   include ApplicationWorker
   include ExceptionBacktrace
diff --git a/app/workers/repository_remove_remote_worker.rb b/app/workers/repository_remove_remote_worker.rb
index 1c19b604b77..a85e9fa9394 100644
--- a/app/workers/repository_remove_remote_worker.rb
+++ b/app/workers/repository_remove_remote_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class RepositoryRemoveRemoteWorker
   include ApplicationWorker
   include ExclusiveLeaseGuard
diff --git a/app/workers/repository_update_remote_mirror_worker.rb b/app/workers/repository_update_remote_mirror_worker.rb
index bb963979e88..9d4e67deb9c 100644
--- a/app/workers/repository_update_remote_mirror_worker.rb
+++ b/app/workers/repository_update_remote_mirror_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class RepositoryUpdateRemoteMirrorWorker
   UpdateAlreadyInProgressError = Class.new(StandardError)
   UpdateError = Class.new(StandardError)
diff --git a/app/workers/requests_profiles_worker.rb b/app/workers/requests_profiles_worker.rb
index 55c236e9e9d..ae022d43e29 100644
--- a/app/workers/requests_profiles_worker.rb
+++ b/app/workers/requests_profiles_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class RequestsProfilesWorker
   include ApplicationWorker
   include CronjobQueue
diff --git a/app/workers/run_pipeline_schedule_worker.rb b/app/workers/run_pipeline_schedule_worker.rb
index 8f5138fc873..1f6cb18c812 100644
--- a/app/workers/run_pipeline_schedule_worker.rb
+++ b/app/workers/run_pipeline_schedule_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class RunPipelineScheduleWorker
   include ApplicationWorker
   include PipelineQueue
diff --git a/app/workers/schedule_update_user_activity_worker.rb b/app/workers/schedule_update_user_activity_worker.rb
index d9376577597..ff42fb8f0e5 100644
--- a/app/workers/schedule_update_user_activity_worker.rb
+++ b/app/workers/schedule_update_user_activity_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ScheduleUpdateUserActivityWorker
   include ApplicationWorker
   include CronjobQueue
diff --git a/app/workers/stage_update_worker.rb b/app/workers/stage_update_worker.rb
index e4b683fca33..ec8c8e3689f 100644
--- a/app/workers/stage_update_worker.rb
+++ b/app/workers/stage_update_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class StageUpdateWorker
   include ApplicationWorker
   include PipelineQueue
diff --git a/app/workers/storage_migrator_worker.rb b/app/workers/storage_migrator_worker.rb
index 0aff0c4c7c6..fa76fbac55c 100644
--- a/app/workers/storage_migrator_worker.rb
+++ b/app/workers/storage_migrator_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class StorageMigratorWorker
   include ApplicationWorker
 
diff --git a/app/workers/stuck_ci_jobs_worker.rb b/app/workers/stuck_ci_jobs_worker.rb
index 7ebf69bdc39..c78b7fac589 100644
--- a/app/workers/stuck_ci_jobs_worker.rb
+++ b/app/workers/stuck_ci_jobs_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class StuckCiJobsWorker
   include ApplicationWorker
   include CronjobQueue
diff --git a/app/workers/stuck_import_jobs_worker.rb b/app/workers/stuck_import_jobs_worker.rb
index 6fdd7592e74..79ce06dd66e 100644
--- a/app/workers/stuck_import_jobs_worker.rb
+++ b/app/workers/stuck_import_jobs_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class StuckImportJobsWorker
   include ApplicationWorker
   include CronjobQueue
diff --git a/app/workers/stuck_merge_jobs_worker.rb b/app/workers/stuck_merge_jobs_worker.rb
index 16394293c79..b0a62f76e94 100644
--- a/app/workers/stuck_merge_jobs_worker.rb
+++ b/app/workers/stuck_merge_jobs_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class StuckMergeJobsWorker
   include ApplicationWorker
   include CronjobQueue
diff --git a/app/workers/system_hook_push_worker.rb b/app/workers/system_hook_push_worker.rb
index ceeaaf8d189..15e369ebcfb 100644
--- a/app/workers/system_hook_push_worker.rb
+++ b/app/workers/system_hook_push_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class SystemHookPushWorker
   include ApplicationWorker
 
diff --git a/app/workers/trending_projects_worker.rb b/app/workers/trending_projects_worker.rb
index 7eb65452a7d..3297a1fe3d0 100644
--- a/app/workers/trending_projects_worker.rb
+++ b/app/workers/trending_projects_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class TrendingProjectsWorker
   include ApplicationWorker
   include CronjobQueue
diff --git a/app/workers/update_head_pipeline_for_merge_request_worker.rb b/app/workers/update_head_pipeline_for_merge_request_worker.rb
index 76f84ff920f..0487a393566 100644
--- a/app/workers/update_head_pipeline_for_merge_request_worker.rb
+++ b/app/workers/update_head_pipeline_for_merge_request_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class UpdateHeadPipelineForMergeRequestWorker
   include ApplicationWorker
   include PipelineQueue
diff --git a/app/workers/update_merge_requests_worker.rb b/app/workers/update_merge_requests_worker.rb
index 74bb9993275..742841219b3 100644
--- a/app/workers/update_merge_requests_worker.rb
+++ b/app/workers/update_merge_requests_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class UpdateMergeRequestsWorker
   include ApplicationWorker
 
diff --git a/app/workers/update_user_activity_worker.rb b/app/workers/update_user_activity_worker.rb
index 27ec5cd33fb..15f01a70337 100644
--- a/app/workers/update_user_activity_worker.rb
+++ b/app/workers/update_user_activity_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class UpdateUserActivityWorker
   include ApplicationWorker
 
diff --git a/app/workers/upload_checksum_worker.rb b/app/workers/upload_checksum_worker.rb
index 65d40336f18..2a0536106d7 100644
--- a/app/workers/upload_checksum_worker.rb
+++ b/app/workers/upload_checksum_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class UploadChecksumWorker
   include ApplicationWorker
 
diff --git a/app/workers/wait_for_cluster_creation_worker.rb b/app/workers/wait_for_cluster_creation_worker.rb
index 19cdb279aaa..8aa1d9290fd 100644
--- a/app/workers/wait_for_cluster_creation_worker.rb
+++ b/app/workers/wait_for_cluster_creation_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class WaitForClusterCreationWorker
   include ApplicationWorker
   include ClusterQueue
diff --git a/app/workers/web_hook_worker.rb b/app/workers/web_hook_worker.rb
index dfc3f33ad9d..09219a24a16 100644
--- a/app/workers/web_hook_worker.rb
+++ b/app/workers/web_hook_worker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class WebHookWorker
   include ApplicationWorker