Use a dedicated queue for each worker

app/workers/all_queues.yml

+---
+- cronjob:admin_email
+- cronjob:expire_build_artifacts
+- cronjob:gitlab_usage_ping
+- cronjob:import_export_project_cleanup
+- cronjob:pipeline_schedule
+- cronjob:prune_old_events
+- cronjob:remove_expired_group_links
+- cronjob:remove_expired_members
+- cronjob:remove_old_web_hook_logs
+- cronjob:remove_unreferenced_lfs_objects
+- cronjob:repository_archive_cache
+- cronjob:repository_check_batch
+- cronjob:requests_profiles
+- cronjob:schedule_update_user_activity
+- cronjob:stuck_ci_jobs
+- cronjob:stuck_import_jobs
+- cronjob:stuck_merge_jobs
+- cronjob:trending_projects
+
+- gcp_cluster:cluster_install_app
+- gcp_cluster:cluster_provision
+- gcp_cluster:cluster_wait_for_app_installation
+- gcp_cluster:wait_for_cluster_creation
+
+- github_import_advance_stage
+- github_importer:github_import_import_diff_note
+- github_importer:github_import_import_issue
+- github_importer:github_import_import_note
+- github_importer:github_import_import_pull_request
+- github_importer:github_import_refresh_import_jid
+- github_importer:github_import_stage_finish_import
+- github_importer:github_import_stage_import_base_data
+- github_importer:github_import_stage_import_issues_and_diff_notes
+- github_importer:github_import_stage_import_notes
+- github_importer:github_import_stage_import_pull_requests
+- github_importer:github_import_stage_import_repository
+
+- pipeline_cache:expire_job_cache
+- pipeline_cache:expire_pipeline_cache
+- pipeline_creation:create_pipeline
+- pipeline_default:build_coverage
+- pipeline_default:build_trace_sections
+- pipeline_default:pipeline_metrics
+- pipeline_default:pipeline_notification
+- pipeline_default:update_head_pipeline_for_merge_request
+- pipeline_hooks:build_hooks
+- pipeline_hooks:pipeline_hooks
+- pipeline_processing:build_finished
+- pipeline_processing:build_queue
+- pipeline_processing:build_success
+- pipeline_processing:pipeline_process
+- pipeline_processing:pipeline_success
+- pipeline_processing:pipeline_update
+- pipeline_processing:stage_update
+
+- repository_check:repository_check_clear
+- repository_check:repository_check_single_repository
+
+- default
+- mailers # ActionMailer::DeliveryJob.queue_name
+
+- authorized_projects
+- background_migration
+- create_gpg_signature
+- delete_merged_branches
+- delete_user
+- email_receiver
+- emails_on_push
+- expire_build_instance_artifacts
+- git_garbage_collect
+- gitlab_shell
+- group_destroy
+- invalid_gpg_signature_update
+- irker
+- merge
+- namespaceless_project_destroy
+- new_issue
+- new_merge_request
+- new_note
+- pages
+- post_receive
+- process_commit
+- project_cache
+- project_destroy
+- project_export
+- project_migrate_hashed_storage
+- project_service
+- propagate_service_template
+- reactive_caching
+- repository_fork
+- repository_import
+- storage_migrator
+- system_hook_push
+- update_merge_requests
+- update_user_activity
+- upload_checksum
+- web_hook
+
+# EE-specific queues
+- cronjob:clear_shared_runners_minutes
+- cronjob:geo_file_download_dispatch
+- cronjob:geo_metrics_update
+- cronjob:geo_prune_event_log
+- cronjob:geo_repository_sync
+- cronjob:historical_data
+- cronjob:ldap_all_groups_sync
+- cronjob:ldap_sync
+- cronjob:update_all_mirrors
+
+- geo:geo_file_removal
+- geo:geo_hashed_storage_attachments_migration
+- geo:geo_hashed_storage_migration
+- geo:geo_rename_repository
+- geo:geo_repositories_clean_up
+- geo:geo_repository_destroy
+
+- admin_emails
+- elastic_batch_project_indexer
+- elastic_commit_indexer
+- elastic_indexer
+- export_csv
+- geo_base_scheduler
+- geo_file_download
+- geo_project_sync
+- geo_repository_shard_sync
+- ldap_group_sync
+- object_storage_upload
+- project_update_repository_storage
+- rebase
+- repository_update_mirror
+- repository_update_remote_mirror

app/workers/build_finished_worker.rb

@@ -2,7 +2,7 @@ class BuildFinishedWorker
   include ApplicationWorker
   include PipelineQueue
 
-  enqueue_in group: :processing
+  queue_namespace :pipeline_processing
 
   def perform(build_id)
     Ci::Build.find_by(id: build_id).try do |build|

app/workers/build_hooks_worker.rb

@@ -2,7 +2,7 @@ class BuildHooksWorker
   include ApplicationWorker
   include PipelineQueue
 
-  enqueue_in group: :hooks
+  queue_namespace :pipeline_hooks
 
   def perform(build_id)
     Ci::Build.find_by(id: build_id)

app/workers/build_queue_worker.rb

@@ -2,7 +2,7 @@ class BuildQueueWorker
   include ApplicationWorker
   include PipelineQueue
 
-  enqueue_in group: :processing
+  queue_namespace :pipeline_processing
 
   def perform(build_id)
     Ci::Build.find_by(id: build_id).try do |build|

app/workers/build_success_worker.rb

@@ -2,7 +2,7 @@ class BuildSuccessWorker
   include ApplicationWorker
   include PipelineQueue
 
-  enqueue_in group: :processing
+  queue_namespace :pipeline_processing
 
   def perform(build_id)
     Ci::Build.find_by(id: build_id).try do |build|

app/workers/concerns/application_worker.rb

@@ -6,10 +6,20 @@ module ApplicationWorker
   include Sidekiq::Worker
 
   included do
-    sidekiq_options queue: base_queue_name
+    set_queue
   end
 
   module ClassMethods
+    def inherited(subclass)
+      subclass.set_queue
+    end
+
+    def set_queue
+      queue_name = [queue_namespace, base_queue_name].compact.join(':')
+
+      sidekiq_options queue: queue_name
+    end
+
     def base_queue_name
       name
         .sub(/\AGitlab::/, '')
@@ -18,6 +28,16 @@ module ApplicationWorker
         .tr('/', '_')
     end
 
+    def queue_namespace(new_namespace = nil)
+      if new_namespace
+        sidekiq_options queue_namespace: new_namespace
+
+        set_queue
+      else
+        get_sidekiq_options['queue_namespace']&.to_s
+      end
+    end
+
     def queue
       get_sidekiq_options['queue'].to_s
     end

app/workers/concerns/cluster_queue.rb

@@ -5,6 +5,6 @@ module ClusterQueue
   extend ActiveSupport::Concern
 
   included do
-    sidekiq_options queue: :gcp_cluster
+    queue_namespace :gcp_cluster
   end
 end

app/workers/concerns/cronjob_queue.rb

@@ -4,6 +4,7 @@ module CronjobQueue
   extend ActiveSupport::Concern
 
   included do
-    sidekiq_options queue: :cronjob, retry: false
+    queue_namespace :cronjob
+    sidekiq_options retry: false
   end
 end

app/workers/concerns/geo_queue.rb

@@ -3,6 +3,6 @@ module GeoQueue
   extend ActiveSupport::Concern
 
   included do
-    sidekiq_options queue: :geo
+    queue_namespace :geo
   end
 end

app/workers/concerns/gitlab/github_import/queue.rb

@@ -4,12 +4,14 @@ module Gitlab
       extend ActiveSupport::Concern
 
       included do
+        queue_namespace :github_importer
+
         # If a job produces an error it may block a stage from advancing
         # forever. To prevent this from happening we prevent jobs from going to
         # the dead queue. This does mean some resources may not be imported, but
         # this is better than a project being stuck in the "import" state
         # forever.
-        sidekiq_options queue: 'github_importer', dead: false, retry: 5
+        sidekiq_options dead: false, retry: 5
       end
     end
   end

app/workers/concerns/pipeline_queue.rb

@@ -5,14 +5,6 @@ module PipelineQueue
   extend ActiveSupport::Concern
 
   included do
-    sidekiq_options queue: 'pipeline_default'
-  end
-
-  class_methods do
-    def enqueue_in(group:)
-      raise ArgumentError, 'Unspecified queue group!' if group.empty?
-
-      sidekiq_options queue: "pipeline_#{group}"
-    end
+    queue_namespace :pipeline_default
   end
 end

app/workers/concerns/repository_check_queue.rb

@@ -3,6 +3,8 @@ module RepositoryCheckQueue
   extend ActiveSupport::Concern
 
   included do
-    sidekiq_options queue: :repository_check, retry: false
+    queue_namespace :repository_check
+
+    sidekiq_options retry: false
   end
 end

app/workers/create_pipeline_worker.rb

@@ -2,7 +2,7 @@ class CreatePipelineWorker
   include ApplicationWorker
   include PipelineQueue
 
-  enqueue_in group: :creation
+  queue_namespace :pipeline_creation
 
   def perform(project_id, user_id, ref, source, params = {})
     project = Project.find(project_id)

app/workers/expire_job_cache_worker.rb

@@ -2,7 +2,7 @@ class ExpireJobCacheWorker
   include ApplicationWorker
   include PipelineQueue
 
-  enqueue_in group: :cache
+  queue_namespace :pipeline_cache
 
   def perform(job_id)
     job = CommitStatus.joins(:pipeline, :project).find_by(id: job_id)

app/workers/expire_pipeline_cache_worker.rb

@@ -2,7 +2,7 @@ class ExpirePipelineCacheWorker
   include ApplicationWorker
   include PipelineQueue
 
-  enqueue_in group: :cache
+  queue_namespace :pipeline_cache
 
   def perform(pipeline_id)
     pipeline = Ci::Pipeline.find_by(id: pipeline_id)

app/workers/geo/base_scheduler_worker.rb

 module Geo
   class BaseSchedulerWorker
     include ApplicationWorker
-    include CronjobQueue
     include ExclusiveLeaseGuard
 
     DB_RETRIEVE_BATCH_SIZE = 1000

app/workers/geo/file_download_dispatch_worker.rb

 module Geo
   class FileDownloadDispatchWorker < Geo::BaseSchedulerWorker
+    include CronjobQueue
+
     private
 
     def max_capacity

app/workers/geo/repository_shard_sync_worker.rb

 module Geo
   class RepositoryShardSyncWorker < Geo::BaseSchedulerWorker
-    # We may have many long-running threads, so split them out
-    # into their own queue to make it possible for other jobs to run.
-    sidekiq_options queue: :geo_repository_shard_sync, retry: false
+    sidekiq_options retry: false
 
     attr_accessor :shard_name
 

app/workers/gitlab/github_import/advance_stage_worker.rb

@@ -9,7 +9,7 @@ module Gitlab
     class AdvanceStageWorker
       include ApplicationWorker
 
-      sidekiq_options queue: 'github_importer_advance_stage', dead: false
+      sidekiq_options dead: false
 
       INTERVAL = 30.seconds.to_i
 

app/workers/pages_worker.rb

 class PagesWorker
   include ApplicationWorker
 
-  sidekiq_options queue: :pages, retry: false
+  sidekiq_options retry: false
 
   def perform(action, *arg)
     send(action, *arg) # rubocop:disable GitlabSecurity/PublicSend

app/workers/pipeline_hooks_worker.rb

@@ -2,7 +2,7 @@ class PipelineHooksWorker
   include ApplicationWorker
   include PipelineQueue
 
-  enqueue_in group: :hooks
+  queue_namespace :pipeline_hooks
 
   def perform(pipeline_id)
     Ci::Pipeline.find_by(id: pipeline_id)

app/workers/pipeline_process_worker.rb

@@ -2,7 +2,7 @@ class PipelineProcessWorker
   include ApplicationWorker
   include PipelineQueue
 
-  enqueue_in group: :processing
+  queue_namespace :pipeline_processing
 
   def perform(pipeline_id)
     Ci::Pipeline.find_by(id: pipeline_id)

app/workers/pipeline_success_worker.rb

@@ -2,7 +2,7 @@ class PipelineSuccessWorker
   include ApplicationWorker
   include PipelineQueue
 
-  enqueue_in group: :processing
+  queue_namespace :pipeline_processing
 
   def perform(pipeline_id)
     Ci::Pipeline.find_by(id: pipeline_id).try do |pipeline|

app/workers/pipeline_update_worker.rb

@@ -2,7 +2,7 @@ class PipelineUpdateWorker
   include ApplicationWorker
   include PipelineQueue
 
-  enqueue_in group: :processing
+  queue_namespace :pipeline_processing
 
   def perform(pipeline_id)
     Ci::Pipeline.find_by(id: pipeline_id)

app/workers/stage_update_worker.rb

@@ -2,7 +2,7 @@ class StageUpdateWorker
   include ApplicationWorker
   include PipelineQueue
 
-  enqueue_in group: :processing
+  queue_namespace :pipeline_processing
 
   def perform(stage_id)
     Ci::Stage.find_by(id: stage_id).try do |stage|

app/workers/update_head_pipeline_for_merge_request_worker.rb

 class UpdateHeadPipelineForMergeRequestWorker
   include ApplicationWorker
-
-  sidekiq_options queue: 'pipeline_default'
+  include PipelineQueue
 
   def perform(merge_request_id)
     merge_request = MergeRequest.find(merge_request_id)

config/initializers/sidekiq.rb

@@ -46,6 +46,8 @@ Sidekiq.configure_server do |config|
 
   Gitlab::SidekiqThrottler.execute!
 
+  Gitlab::SidekiqVersioning.install!
+
   config = Gitlab::Database.config ||
     Rails.application.config.database_configuration[Rails.env]
   config['pool'] = Sidekiq.options[:concurrency]
@@ -72,19 +74,3 @@ Sidekiq.configure_client do |config|
     chain.add Gitlab::SidekiqStatus::ClientMiddleware
   end
 end
-
-# The Sidekiq client API always adds the queue to the Sidekiq queue
-# list, but mail_room and gitlab-shell do not. This is only necessary
-# for monitoring.
-begin
-  queues = Gitlab::SidekiqConfig.worker_queues
-
-  Sidekiq.redis do |conn|
-    conn.pipelined do
-      queues.each do |queue|
-        conn.sadd('queues', queue)
-      end
-    end
-  end
-rescue Redis::BaseError, SocketError, Errno::ENOENT, Errno::EADDRNOTAVAIL, Errno::EAFNOSUPPORT, Errno::ECONNRESET, Errno::ECONNREFUSED
-end

config/sidekiq_queues.yml

@@ -25,8 +25,8 @@
   - [new_note, 2]
   - [new_issue, 2]
   - [new_merge_request, 2]
-  - [build, 2]
-  - [pipeline, 2]
+  - [build, 2] # Replaced by pipeline
+  - [pipeline, 2] # Replaced by pipeline_*
   - [pipeline_processing, 5]
   - [pipeline_creation, 4]
   - [pipeline_default, 3]
@@ -38,11 +38,13 @@
   - [mailers, 2]
   - [invalid_gpg_signature_update, 2]
   - [create_gpg_signature, 2]
+  - [rebase, 2]
   - [upload_checksum, 1]
   - [repository_fork, 1]
   - [repository_import, 1]
   - [github_importer, 1]
-  - [github_importer_advance_stage, 1]
+  - [github_importer_advance_stage, 1] # Replaced by github_import_advance_stage
+  - [github_import_advance_stage, 1]
   - [project_service, 1]
   - [delete_user, 1]
   - [delete_merged_branches, 1]
@@ -68,13 +70,15 @@
   - [gcp_cluster, 1]
   - [project_migrate_hashed_storage, 1]
   - [storage_migrator, 1]
-  # EE specific queues
+
+  # EE-specific queues
   - [ldap_group_sync, 2]
   - [geo, 1]
   - [repository_update_mirror, 1]
   - [repository_update_remote_mirror, 1]
   - [project_update_repository_storage, 1]
   - [admin_emails, 1]
+  - [geo_base_scheduler, 1] # Parent class of geo_repository_shard_sync and cronjob:geo_file_download_dispatch
   - [geo_project_sync, 1]
   - [geo_file_download, 1]
   - [geo_repository_shard_sync, 1]

ee/app/workers/rebase_worker.rb

 class RebaseWorker
   include ApplicationWorker
 
-  sidekiq_options queue: :merge
-
   def perform(merge_request_id, current_user_id)
     current_user = User.find(current_user_id)
     merge_request = MergeRequest.find(merge_request_id)

lib/gitlab/sidekiq_cluster/cli.rb

@@ -33,8 +33,13 @@ module Gitlab
 
         queue_groups = SidekiqCluster.parse_queues(argv)
 
+        all_queues = SidekiqConfig.worker_queues(@rails_path)
+
+        queue_groups.map! do |queues|
+          SidekiqConfig.expand_queues(queues, all_queues)
+        end
+
         if @negate_queues
-          all_queues = SidekiqConfig.config_queues(@rails_path)
           queue_groups.map! { |queues| all_queues - queues }
         end
 

lib/gitlab/sidekiq_config.rb

 require 'yaml'
+require 'set'
 
 module Gitlab
   module SidekiqConfig
-    def self.redis_queues
-      @redis_queues ||= Sidekiq::Queue.all.map(&:name)
+    # This method is called by `bin/sidekiq-cluster` in EE, which runs outside
+    # of bundler/Rails context, so we cannot use any gem or Rails methods.
+    def self.worker_queues(rails_path = Rails.root.to_s)
+      @worker_queues ||= {}
+      @worker_queues[rails_path] ||= YAML.load_file(File.join(rails_path, 'app/workers/all_queues.yml'))
     end
 
     # This method is called by `bin/sidekiq-cluster` in EE, which runs outside
     # of bundler/Rails context, so we cannot use any gem or Rails methods.
-    def self.config_queues(rails_path = Rails.root.to_s)
+    def self.expand_queues(queues, all_queues = self.worker_queues)
+      return [] if queues.empty?
+
+      queues_set = all_queues.to_set
+
+      queues.flat_map do |queue|
+        [queue, *queues_set.grep(/\A#{queue}:/)]
+      end
+    end
+
+    def self.redis_queues
+      # Not memoized, because this can change during the life of the application
+      Sidekiq::Queue.all.map(&:name)
+    end
+
+    def self.config_queues
       @config_queues ||= begin
-        config = YAML.load_file(File.join(rails_path, 'config', 'sidekiq_queues.yml'))
+        config = YAML.load_file(Rails.root.join('config/sidekiq_queues.yml'))
         config[:queues].map(&:first)
       end
     end
@@ -25,14 +44,6 @@ module Gitlab
         find_workers(Rails.root.join('ee', 'app', 'workers'))
     end
 
-    def self.default_queues
-      [ActionMailer::DeliveryJob.queue_name, 'default']
-    end
-
-    def self.worker_queues
-      @worker_queues ||= (workers.map(&:queue) + default_queues).uniq
-    end
-
     def self.find_workers(root)
       concerns = root.join('concerns').to_s
 
@@ -45,7 +56,7 @@ module Gitlab
         ns.camelize.constantize
       end
 
-      # Skip concerns
+      # Skip things that aren't workers
       workers.select { |w| w < Sidekiq::Worker }
     end
   end

lib/gitlab/sidekiq_versioning.rb

+module Gitlab
+  module SidekiqVersioning
+    def self.install!
+      Sidekiq::Manager.prepend SidekiqVersioning::Manager
+
+      # The Sidekiq client API always adds the queue to the Sidekiq queue
+      # list, but mail_room and gitlab-shell do not. This is only necessary
+      # for monitoring.
+      begin
+        queues = SidekiqConfig.worker_queues
+
+        if queues.any?
+          Sidekiq.redis do |conn|
+            conn.pipelined do
+              queues.each do |queue|
+                conn.sadd('queues', queue)
+              end
+            end
+          end
+        end
+      rescue ::Redis::BaseError, SocketError, Errno::ENOENT, Errno::EADDRNOTAVAIL, Errno::EAFNOSUPPORT, Errno::ECONNRESET, Errno::ECONNREFUSED
+      end
+    end
+  end
+end

lib/gitlab/sidekiq_versioning/manager.rb

+module Gitlab
+  module SidekiqVersioning
+    module Manager
+      def initialize(options = {})
+        options[:strict] = false
+        options[:queues] = SidekiqConfig.expand_queues(options[:queues])
+        Sidekiq.logger.info "Listening on queues #{options[:queues].uniq.sort}"
+        super
+      end
+    end
+  end
+end

spec/lib/gitlab/sidekiq_cluster/cli_spec.rb

@@ -11,28 +11,41 @@ describe Gitlab::SidekiqCluster::CLI do
     end
 
     context 'with arguments' do
-      it 'starts the Sidekiq workers' do
-        expect(Gitlab::SidekiqCluster).to receive(:start).and_return([])
+      before do
         expect(cli).to receive(:write_pid)
         expect(cli).to receive(:trap_signals)
         expect(cli).to receive(:start_loop)
+      end
+
+      it 'starts the Sidekiq workers' do
+        expect(Gitlab::SidekiqCluster).to receive(:start)
+                                            .with([['foo']], 'test', Dir.pwd, dryrun: false)
+                                            .and_return([])
 
         cli.run(%w(foo))
       end
 
       context 'with --negate flag' do
-        it 'starts Sidekiq workers for all queues on sidekiq_queues.yml except the ones on argv' do
-          expect(Gitlab::SidekiqConfig).to receive(:config_queues).and_return(['baz'])
+        it 'starts Sidekiq workers for all queues in all_queues.yml except the ones in argv' do
+          expect(Gitlab::SidekiqConfig).to receive(:worker_queues).and_return(['baz'])
           expect(Gitlab::SidekiqCluster).to receive(:start)
                                               .with([['baz']], 'test', Dir.pwd, dryrun: false)
                                               .and_return([])
-          expect(cli).to receive(:write_pid)
-          expect(cli).to receive(:trap_signals)
-          expect(cli).to receive(:start_loop)
 
           cli.run(%w(foo -n))
         end
       end
+
+      context 'queue namespace expansion' do
+        it 'starts Sidekiq workers for all queues in all_queues.yml with a namespace in argv' do
+          expect(Gitlab::SidekiqConfig).to receive(:worker_queues).and_return(['cronjob:foo', 'cronjob:bar'])
+          expect(Gitlab::SidekiqCluster).to receive(:start)
+                                              .with([['cronjob', 'cronjob:foo', 'cronjob:bar']], 'test', Dir.pwd, dryrun: false)
+                                              .and_return([])
+
+          cli.run(%w(cronjob))
+        end
+      end
     end
   end
 

spec/lib/gitlab/sidekiq_config_spec.rb

@@ -23,7 +23,7 @@ describe Gitlab::SidekiqConfig do
 
       expect(queues).to include('post_receive')
       expect(queues).to include('merge')
-      expect(queues).to include('cronjob')
+      expect(queues).to include('cronjob:stuck_import_jobs')
       expect(queues).to include('mailers')
       expect(queues).to include('default')
     end
@@ -35,4 +35,25 @@ describe Gitlab::SidekiqConfig do
       expect(queues).to include('ldap_group_sync')
     end
   end
+
+  describe '.expand_queues' do
+    it 'expands queue namespaces to concrete queue names' do
+      queues = described_class.expand_queues(%w[cronjob])
+
+      expect(queues).to include('cronjob:stuck_import_jobs')
+      expect(queues).to include('cronjob:stuck_merge_jobs')
+    end
+
+    it 'lets concrete queue names pass through' do
+      queues = described_class.expand_queues(%w[post_receive])
+
+      expect(queues).to include('post_receive')
+    end
+
+    it 'lets unknown queues pass through' do
+      queues = described_class.expand_queues(%w[unknown])
+
+      expect(queues).to include('unknown')
+    end
+  end
 end

spec/lib/gitlab/sidekiq_versioning/manager_spec.rb

+require 'spec_helper'
+
+describe Gitlab::SidekiqVersioning::Manager do
+  before do
+    Sidekiq::Manager.prepend described_class
+  end
+
+  describe '#initialize' do
+    it 'listens on all expanded queues' do
+      manager = Sidekiq::Manager.new(queues: %w[post_receive repository_fork cronjob unknown])
+
+      queues = manager.options[:queues]
+
+      expect(queues).to include('post_receive')
+      expect(queues).to include('repository_fork')
+      expect(queues).to include('cronjob')
+      expect(queues).to include('cronjob:stuck_import_jobs')
+      expect(queues).to include('cronjob:stuck_merge_jobs')
+      expect(queues).to include('unknown')
+    end
+  end
+end

spec/lib/gitlab/sidekiq_versioning_spec.rb

+require 'spec_helper'
+
+describe Gitlab::SidekiqVersioning, :sidekiq, :redis do
+  let(:foo_worker) do
+    Class.new do
+      def self.name
+        'FooWorker'
+      end
+
+      include ApplicationWorker
+    end
+  end
+
+  let(:bar_worker) do
+    Class.new do
+      def self.name
+        'BarWorker'
+      end
+
+      include ApplicationWorker
+    end
+  end
+
+  before do
+    allow(Gitlab::SidekiqConfig).to receive(:workers).and_return([foo_worker, bar_worker])
+    allow(Gitlab::SidekiqConfig).to receive(:worker_queues).and_return([foo_worker.queue, bar_worker.queue])
+  end
+
+  describe '.install!' do
+    it 'prepends SidekiqVersioning::Manager into Sidekiq::Manager' do
+      described_class.install!
+
+      expect(Sidekiq::Manager).to include(Gitlab::SidekiqVersioning::Manager)
+    end
+
+    it 'registers all versionless and versioned queues with Redis' do
+      described_class.install!
+
+      queues = Sidekiq::Queue.all.map(&:name)
+      expect(queues).to include('foo')
+      expect(queues).to include('bar')
+    end
+  end
+end

spec/workers/concerns/application_worker_spec.rb

@@ -17,6 +17,14 @@ describe ApplicationWorker do
     end
   end
 
+  describe '.queue_namespace' do
+    it 'sets the queue name based on the class name' do
+      worker.queue_namespace :some_namespace
+
+      expect(worker.queue).to eq('some_namespace:foo_bar_dummy')
+    end
+  end
+
   describe '.queue' do
     it 'returns the queue name' do
       worker.sidekiq_options queue: :some_queue

spec/workers/concerns/cluster_queue_spec.rb

@@ -14,6 +14,6 @@ describe ClusterQueue do
 
   it 'sets a default pipelines queue automatically' do
     expect(worker.sidekiq_options['queue'])
-      .to eq :gcp_cluster
+      .to eq 'gcp_cluster:dummy'
   end
 end

spec/workers/concerns/cronjob_queue_spec.rb

@@ -13,7 +13,7 @@ describe CronjobQueue do
   end
 
   it 'sets the queue name of a worker' do
-    expect(worker.sidekiq_options['queue'].to_s).to eq('cronjob')
+    expect(worker.sidekiq_options['queue'].to_s).to eq('cronjob:dummy')
   end
 
   it 'disables retrying of failed jobs' do

spec/workers/concerns/geo_queue_spec.rb

@@ -13,6 +13,6 @@ describe GeoQueue do
   end
 
   it 'sets the queue name of a worker' do
-    expect(worker.sidekiq_options['queue'].to_s).to eq('geo')
+    expect(worker.sidekiq_options['queue'].to_s).to eq('geo:dummy')
   end
 end

spec/workers/concerns/gitlab/github_import/queue_spec.rb

@@ -11,6 +11,6 @@ describe Gitlab::GithubImport::Queue do
       include Gitlab::GithubImport::Queue
     end
 
-    expect(worker.sidekiq_options['queue']).to eq('github_importer')
+    expect(worker.sidekiq_options['queue']).to eq('github_importer:dummy')
   end
 end

spec/workers/concerns/pipeline_queue_spec.rb

@@ -14,15 +14,6 @@ describe PipelineQueue do
 
   it 'sets a default pipelines queue automatically' do
     expect(worker.sidekiq_options['queue'])
-      .to eq 'pipeline_default'
-  end
-
-  describe '.enqueue_in' do
-    it 'sets a custom sidekiq queue with prefix and group' do
-      worker.enqueue_in(group: :processing)
-
-      expect(worker.sidekiq_options['queue'])
-        .to eq 'pipeline_processing'
-    end
+      .to eq 'pipeline_default:dummy'
   end
 end

spec/workers/concerns/repository_check_queue_spec.rb

@@ -13,7 +13,7 @@ describe RepositoryCheckQueue do
   end
 
   it 'sets the queue name of a worker' do
-    expect(worker.sidekiq_options['queue'].to_s).to eq('repository_check')
+    expect(worker.sidekiq_options['queue'].to_s).to eq('repository_check:dummy')
   end
 
   it 'disables retrying of failed jobs' do

spec/workers/every_sidekiq_worker_spec.rb

@@ -10,12 +10,31 @@ describe 'Every Sidekiq worker' do
   end
 
   it 'uses the cronjob queue when the worker runs as a cronjob' do
-    expect(Gitlab::SidekiqConfig.cron_workers.map(&:queue)).to all(eq('cronjob'))
+    expect(Gitlab::SidekiqConfig.cron_workers.map(&:queue)).to all(start_with('cronjob:'))
   end
 
-  it 'defines the queue in the Sidekiq configuration file' do
-    config_queue_names = Gitlab::SidekiqConfig.config_queues.to_set
+  it 'has its queue in app/workers/all_queues.yml', :aggregate_failures do
+    file_worker_queues = Gitlab::SidekiqConfig.worker_queues.to_set
 
-    expect(Gitlab::SidekiqConfig.worker_queues).to all(be_in(config_queue_names))
+    worker_queues = Gitlab::SidekiqConfig.workers.map(&:queue).to_set
+    worker_queues << ActionMailer::DeliveryJob.queue_name
+    worker_queues << 'default'
+
+    missing_from_file = worker_queues - file_worker_queues
+    expect(missing_from_file).to be_empty, "expected #{missing_from_file.to_a.inspect} to be in app/workers/all_queues.yml"
+
+    unncessarily_in_file = file_worker_queues - worker_queues
+    expect(unncessarily_in_file).to be_empty, "expected #{unncessarily_in_file.to_a.inspect} not to be in app/workers/all_queues.yml"
+  end
+
+  it 'has its queue or namespace in config/sidekiq_queues.yml', :aggregate_failures do
+    config_queues = Gitlab::SidekiqConfig.config_queues.to_set
+
+    Gitlab::SidekiqConfig.workers.each do |worker|
+      queue = worker.queue
+      queue_namespace = queue.split(':').first
+
+      expect(config_queues).to include(queue).or(include(queue_namespace))
+    end
   end
 end