Merge branch 'ee-hashed-storage-attachments-migration-path' into 'master'

[EE] Hashed Storage Attachments migration path

See merge request gitlab-org/gitlab-ee!3544

app/models/geo/event_log.rb

@@ -30,6 +30,10 @@ module Geo
       class_name: 'Geo::LfsObjectDeletedEvent',
       foreign_key: :lfs_object_deleted_event_id
 
+    belongs_to :hashed_storage_attachments_event,
+      class_name: 'Geo::HashedStorageAttachmentsEvent',
+      foreign_key: :hashed_storage_attachments_event_id
+
     def self.latest_event
       order(id: :desc).first
     end
@@ -41,7 +45,8 @@ module Geo
         repository_renamed_event ||
         repositories_changed_event ||
         hashed_storage_migrated_event ||
-        lfs_object_deleted_event
+        lfs_object_deleted_event ||
+        hashed_storage_attachments_event
     end
 
     def project_id

app/models/geo/hashed_storage_attachments_event.rb

+module Geo
+  class HashedStorageAttachmentsEvent < ActiveRecord::Base
+    include Geo::Model
+
+    belongs_to :project
+
+    validates :project, :old_attachments_path, :new_attachments_path, presence: true
+  end
+end

app/models/project.rb

@@ -277,8 +277,9 @@ class Project < ActiveRecord::Base
   scope :pending_delete, -> { where(pending_delete: true) }
   scope :without_deleted, -> { where(pending_delete: false) }
 
-  scope :with_hashed_storage, -> { where('storage_version >= 1') }
-  scope :with_legacy_storage, -> { where(storage_version: [nil, 0]) }
+  scope :with_storage_feature, ->(feature) { where('storage_version >= :version', version: HASHED_STORAGE_FEATURES[feature]) }
+  scope :without_storage_feature, ->(feature) { where('storage_version < :version OR storage_version IS NULL', version: HASHED_STORAGE_FEATURES[feature]) }
+  scope :with_unmigrated_storage, -> { where('storage_version < :version OR storage_version IS NULL', version: LATEST_STORAGE_VERSION) }
 
   scope :sorted_by_activity, -> { reorder(last_activity_at: :desc) }
   scope :sorted_by_stars, -> { reorder('projects.star_count DESC') }

app/models/storage/hashed_project.rb

@@ -4,7 +4,6 @@ module Storage
     delegate :gitlab_shell, :repository_storage_path, to: :project
 
     ROOT_PATH_PREFIX = '@hashed'.freeze
-    STORAGE_VERSION = 1
 
     def initialize(project)
       @project = project

app/services/geo/hashed_storage_attachments_event_store.rb

+module Geo
+  class HashedStorageAttachmentsEventStore < EventStore
+    self.event_type = :hashed_storage_attachments_event
+
+    private
+
+    def build_event
+      Geo::HashedStorageAttachmentsEvent.new(
+        project: project,
+        old_attachments_path: old_attachments_path,
+        new_attachments_path: new_attachments_path
+      )
+    end
+
+    def old_attachments_path
+      params.fetch(:old_attachments_path)
+    end
+
+    def new_attachments_path
+      params.fetch(:new_attachments_path)
+    end
+  end
+end

app/services/geo/hashed_storage_attachments_migration_service.rb

+module Geo
+  AttachmentMigrationError = Class.new(StandardError)
+
+  class HashedStorageAttachmentsMigrationService
+    include ::Gitlab::Geo::LogHelpers
+
+    attr_reader :project_id, :old_attachments_path, :new_attachments_path
+
+    def initialize(project_id, old_attachments_path:, new_attachments_path:)
+      @project_id = project_id
+      @old_attachments_path = old_attachments_path
+      @new_attachments_path = new_attachments_path
+    end
+
+    def async_execute
+      Geo::HashedStorageAttachmentsMigrationWorker.perform_async(
+        project_id,
+        old_attachments_path,
+        new_attachments_path
+      )
+    end
+
+    def execute
+      origin = File.join(CarrierWave.root, FileUploader.base_dir, old_attachments_path)
+      target = File.join(CarrierWave.root, FileUploader.base_dir, new_attachments_path)
+      move_folder!(origin, target)
+    end
+
+    private
+
+    def project
+      @project ||= Project.find(project_id)
+    end
+
+    def move_folder!(old_path, new_path)
+      unless File.directory?(old_path)
+        log_info("Skipped attachments migration to Hashed Storage, source path doesn't exist or is not a directory", project_id: project.id, source: old_path, target: new_path)
+        return
+      end
+
+      if File.exist?(new_path)
+        log_error("Cannot migrate attachments to Hashed Storage, target path already exist", project_id: project.id, source: old_path, target: new_path)
+        raise AttachmentMigrationError, "Target path '#{new_path}' already exist"
+      end
+
+      # Create hashed storage base path folder
+      FileUtils.mkdir_p(File.dirname(new_path))
+
+      FileUtils.mv(old_path, new_path)
+      log_info("Migrated project attachments to Hashed Storage", project_id: project.id, source: old_path, target: new_path)
+
+      true
+    end
+  end
+end

app/services/geo/hashed_storage_migration_service.rb

 module Geo
   class HashedStorageMigrationService
+    include ::Gitlab::Geo::LogHelpers
+
     attr_reader :project_id, :old_disk_path, :new_disk_path, :old_storage_version
 
     def initialize(project_id, old_disk_path:, new_disk_path:, old_storage_version:)
@@ -22,9 +24,12 @@ module Geo
       project.expire_caches_before_rename(old_disk_path)
 
       if migrating_from_legacy_storage? && !move_repository
+        log_error("Repository could not be migrated to Hashed Storage", project_id: project.id, source: old_disk_path, target: new_disk_path)
         raise RepositoryCannotBeRenamed, "Repository #{old_disk_path} could not be renamed to #{new_disk_path}"
       end
 
+      log_info("Repository migrated to Hashed Storage", project_id: project.id, source: old_disk_path, target: new_disk_path)
+
       true
     end
 

app/services/projects/hashed_storage/migrate_attachments_service.rb

+module Projects
+  module HashedStorage
+    AttachmentMigrationError = Class.new(StandardError)
+
+    class MigrateAttachmentsService < BaseService
+      attr_reader :logger, :old_path, :new_path
+
+      prepend ::EE::Projects::HashedStorage::MigrateAttachmentsService
+
+      def initialize(project, logger = nil)
+        @project = project
+        @logger = logger || Rails.logger
+      end
+
+      def execute
+        @old_path = project.full_path
+        @new_path = project.disk_path
+
+        origin = FileUploader.dynamic_path_segment(project)
+        project.storage_version = ::Project::HASHED_STORAGE_FEATURES[:attachments]
+        target = FileUploader.dynamic_path_segment(project)
+
+        result = move_folder!(origin, target)
+        project.save!
+
+        if result && block_given?
+          yield
+        end
+
+        result
+      end
+
+      private
+
+      def move_folder!(old_path, new_path)
+        unless File.directory?(old_path)
+          logger.info("Skipped attachments migration from '#{old_path}' to '#{new_path}', source path doesn't exist or is not a directory (PROJECT_ID=#{project.id})")
+          return
+        end
+
+        if File.exist?(new_path)
+          logger.error("Cannot migrate attachments from '#{old_path}' to '#{new_path}', target path already exist (PROJECT_ID=#{project.id})")
+          raise AttachmentMigrationError, "Target path '#{new_path}' already exist"
+        end
+
+        # Create hashed storage base path folder
+        FileUtils.mkdir_p(File.dirname(new_path))
+
+        FileUtils.mv(old_path, new_path)
+        logger.info("Migrated project attachments from '#{old_path}' to '#{new_path}' (PROJECT_ID=#{project.id})")
+
+        true
+      end
+    end
+  end
+end

app/services/projects/hashed_storage/migrate_repository_service.rb

+module Projects
+  module HashedStorage
+    class MigrateRepositoryService < BaseService
+      include Gitlab::ShellAdapter
+
+      prepend ::EE::Projects::HashedStorage::MigrateRepositoryService
+
+      attr_reader :old_disk_path, :new_disk_path, :old_wiki_disk_path, :old_storage_version, :logger
+
+      def initialize(project, logger = nil)
+        @project = project
+        @logger = logger || Rails.logger
+      end
+
+      def execute
+        @old_disk_path = project.disk_path
+        has_wiki = project.wiki.repository_exists?
+
+        @old_storage_version = project.storage_version
+        project.storage_version = ::Project::HASHED_STORAGE_FEATURES[:repository]
+        project.ensure_storage_path_exists
+
+        @new_disk_path = project.disk_path
+
+        result = move_repository(@old_disk_path, @new_disk_path)
+
+        if has_wiki
+          @old_wiki_disk_path = "#{@old_disk_path}.wiki"
+          result &&= move_repository("#{@old_wiki_disk_path}", "#{@new_disk_path}.wiki")
+        end
+
+        unless result
+          rollback_folder_move
+          project.storage_version = nil
+        end
+
+        project.repository_read_only = false
+        project.save!
+
+        if result && block_given?
+          yield
+        end
+
+        result
+      end
+
+      private
+
+      def move_repository(from_name, to_name)
+        from_exists = gitlab_shell.exists?(project.repository_storage_path, "#{from_name}.git")
+        to_exists = gitlab_shell.exists?(project.repository_storage_path, "#{to_name}.git")
+
+        # If we don't find the repository on either original or target we should log that as it could be an issue if the
+        # project was not originally empty.
+        if !from_exists && !to_exists
+          logger.warn "Can't find a repository on either source or target paths for #{project.full_path} (ID=#{project.id}) ..."
+          return false
+        elsif !from_exists
+          # Repository have been moved already.
+          return true
+        end
+
+        gitlab_shell.mv_repository(project.repository_storage_path, from_name, to_name)
+      end
+
+      def rollback_folder_move
+        move_repository(@new_disk_path, @old_disk_path)
+        move_repository("#{@new_disk_path}.wiki", "#{@old_disk_path}.wiki")
+      end
+    end
+  end
+end

app/services/projects/hashed_storage_migration_service.rb

 module Projects
   class HashedStorageMigrationService < BaseService
-    include Gitlab::ShellAdapter
-
-    prepend ::EE::Projects::HashedStorageMigrationService
-
-    attr_reader :old_disk_path, :new_disk_path, :old_wiki_disk_path, :old_storage_version
+    attr_reader :logger
 
     def initialize(project, logger = nil)
       @project = project
-      @logger ||= Rails.logger
+      @logger = logger || Rails.logger
     end
 
     def execute
-      return if project.hashed_storage?(:repository)
-
-      @old_disk_path = project.disk_path
-      has_wiki = project.wiki.repository_exists?
-
-      @old_storage_version = project.storage_version
-      project.storage_version = Storage::HashedProject::STORAGE_VERSION
-      project.ensure_storage_path_exists
-
-      @new_disk_path = project.disk_path
-
-      result = move_repository(@old_disk_path, @new_disk_path)
-
-      if has_wiki
-        @old_wiki_disk_path = "#{@old_disk_path}.wiki"
-        result &&= move_repository(@old_wiki_disk_path, "#{@new_disk_path}.wiki")
+      # Migrate repository from Legacy to Hashed Storage
+      unless project.hashed_storage?(:repository)
+        return unless HashedStorage::MigrateRepositoryService.new(project, logger).execute
       end
 
-      unless result
-        rollback_folder_move
-        return
-      end
-
-      project.repository_read_only = false
-      project.save!
-
-      block_given? ? yield : result
+      # Migrate attachments from Legacy to Hashed Storage
+      unless project.hashed_storage?(:attachments)
+        HashedStorage::MigrateAttachmentsService.new(project, logger).execute
       end
-
-    private
-
-    def move_repository(from_name, to_name)
-      from_exists = gitlab_shell.exists?(project.repository_storage_path, "#{from_name}.git")
-      to_exists = gitlab_shell.exists?(project.repository_storage_path, "#{to_name}.git")
-
-      # If we don't find the repository on either original or target we should log that as it could be an issue if the
-      # project was not originally empty.
-      if !from_exists && !to_exists
-        logger.warn "Can't find a repository on either source or target paths for #{project.full_path} (ID=#{project.id}) ..."
-        return false
-      elsif !from_exists
-        # Repository have been moved already.
-        return true
-      end
-
-      gitlab_shell.mv_repository(project.repository_storage_path, from_name, to_name)
-    end
-
-    def rollback_folder_move
-      move_repository(@new_disk_path, @old_disk_path)
-      move_repository("#{@new_disk_path}.wiki", "#{@old_disk_path}.wiki")
-    end
-
-    def logger
-      @logger
     end
   end
 end

app/uploaders/file_uploader.rb

@@ -31,12 +31,19 @@ class FileUploader < GitlabUploader
   # Returns a String without a trailing slash
   def self.dynamic_path_segment(project)
     if project.hashed_storage?(:attachments)
-      File.join(CarrierWave.root, base_dir, project.disk_path)
+      dynamic_path_builder(project.disk_path)
     else
-      File.join(CarrierWave.root, base_dir, project.full_path)
+      dynamic_path_builder(project.full_path)
     end
   end
 
+  # Auxiliary method to build dynamic path segment when not using a project model
+  #
+  # Prefer to use the `.dynamic_path_segment` as it includes Hashed Storage specific logic
+  def self.dynamic_path_builder(path)
+    File.join(CarrierWave.root, base_dir, path)
+  end
+
   attr_accessor :model
   attr_reader :secret
 

app/workers/geo/hashed_storage_attachments_migration_worker.rb

+module Geo
+  class HashedStorageAttachmentsMigrationWorker
+    include Sidekiq::Worker
+    include GeoQueue
+
+    def perform(project_id, old_attachments_path, new_attachments_path)
+      Geo::HashedStorageAttachmentsMigrationService.new(
+        project_id,
+        old_attachments_path: old_attachments_path,
+        new_attachments_path: new_attachments_path
+      ).execute
+    end
+  end
+end

app/workers/project_migrate_hashed_storage_worker.rb

@@ -2,10 +2,34 @@ class ProjectMigrateHashedStorageWorker
   include Sidekiq::Worker
   include DedicatedSidekiqQueue
 
+  LEASE_TIMEOUT = 30.seconds.to_i
+
   def perform(project_id)
     project = Project.find_by(id: project_id)
     return if project.nil? || project.pending_delete?
 
+    uuid = lease_for(project_id).try_obtain
+    if uuid
       ::Projects::HashedStorageMigrationService.new(project, logger).execute
+    else
+      false
+    end
+  rescue => ex
+    cancel_lease_for(project_id, uuid) if uuid
+    raise ex
+  end
+
+  def lease_for(project_id)
+    Gitlab::ExclusiveLease.new(lease_key(project_id), timeout: LEASE_TIMEOUT)
+  end
+
+  private
+
+  def lease_key(project_id)
+    "project_migrate_hashed_storage_worker:#{project_id}"
+  end
+
+  def cancel_lease_for(project_id, uuid)
+    Gitlab::ExclusiveLease.cancel(lease_key(project_id), uuid)
   end
 end

changelogs/unreleased-ee/ee-hashed-storage-attachments-migration-path.yml

+---
+title: 'Geo: replicate Attachments migration to Hashed Storage in secondary node'
+merge_request: 3544
+author:
+type: added

changelogs/unreleased/hashed-storage-attachments-migration-path.yml

+---
+title: Hashed Storage migration script now supports migrating project attachments
+merge_request: 15352
+author:
+type: added

db/migrate/20171124070437_add_attachments_migration_to_geo_migration_events.rb

+# See http://doc.gitlab.com/ce/development/migration_style_guide.html
+# for more information on how to write migrations for GitLab.
+
+class AddAttachmentsMigrationToGeoMigrationEvents < ActiveRecord::Migration
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  def change
+    create_table :geo_hashed_storage_attachments_events, id: :bigserial do |t|
+      t.references :project, index: true, foreign_key: { on_delete: :cascade }, null: false
+      t.text :old_attachments_path, null: false
+      t.text :new_attachments_path, null: false
+    end
+
+    add_column :geo_event_log, :hashed_storage_attachments_event_id, :integer, limit: 8
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20171121144800) do
+ActiveRecord::Schema.define(version: 20171124070437) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -882,6 +882,7 @@ ActiveRecord::Schema.define(version: 20171121144800) do
     t.integer "repository_created_event_id", limit: 8
     t.integer "hashed_storage_migrated_event_id", limit: 8
     t.integer "lfs_object_deleted_event_id", limit: 8
+    t.integer "hashed_storage_attachments_event_id", limit: 8
   end
 
   add_index "geo_event_log", ["repositories_changed_event_id"], name: "index_geo_event_log_on_repositories_changed_event_id", using: :btree
@@ -890,6 +891,14 @@ ActiveRecord::Schema.define(version: 20171121144800) do
   add_index "geo_event_log", ["repository_renamed_event_id"], name: "index_geo_event_log_on_repository_renamed_event_id", using: :btree
   add_index "geo_event_log", ["repository_updated_event_id"], name: "index_geo_event_log_on_repository_updated_event_id", using: :btree
 
+  create_table "geo_hashed_storage_attachments_events", id: :bigserial, force: :cascade do |t|
+    t.integer "project_id", null: false
+    t.text "old_attachments_path", null: false
+    t.text "new_attachments_path", null: false
+  end
+
+  add_index "geo_hashed_storage_attachments_events", ["project_id"], name: "index_geo_hashed_storage_attachments_events_on_project_id", using: :btree
+
   create_table "geo_hashed_storage_migrated_events", id: :bigserial, force: :cascade do |t|
     t.integer "project_id", null: false
     t.text "repository_storage_name", null: false
@@ -2450,6 +2459,7 @@ ActiveRecord::Schema.define(version: 20171121144800) do
   add_foreign_key "geo_event_log", "geo_repository_deleted_events", column: "repository_deleted_event_id", name: "fk_c4b1c1f66e", on_delete: :cascade
   add_foreign_key "geo_event_log", "geo_repository_renamed_events", column: "repository_renamed_event_id", name: "fk_86c84214ec", on_delete: :cascade
   add_foreign_key "geo_event_log", "geo_repository_updated_events", column: "repository_updated_event_id", on_delete: :cascade
+  add_foreign_key "geo_hashed_storage_attachments_events", "projects", on_delete: :cascade
   add_foreign_key "geo_hashed_storage_migrated_events", "projects", on_delete: :cascade
   add_foreign_key "geo_node_namespace_links", "geo_nodes", on_delete: :cascade
   add_foreign_key "geo_node_namespace_links", "namespaces", on_delete: :cascade

doc/administration/raketasks/storage.md

 # Repository Storage Rake Tasks
 
 This is a collection of rake tasks you can use to help you list and migrate 
-existing projects from Legacy storage to the new Hashed storage type.
+existing projects and attachments associated with it from Legacy storage to 
+the new Hashed storage type.
 
 You can read more about the storage types [here][storage-types].
 
+## Migrate existing projects to Hashed storage
+
+Before migrating your existing projects, you should 
+[enable hashed storage][storage-migration] for the new projects as well.
+
+This task will schedule all your existing projects and attachments associated with it to be migrated to the 
+**Hashed** storage type:
+
+**Omnibus Installation**
+
+```bash
+gitlab-rake gitlab:storage:migrate_to_hashed
+```
+
+**Source Installation**
+
+```bash
+rake gitlab:storage:migrate_to_hashed
+
+```
+
+You can monitor the progress in the _Admin > Monitoring > Background jobs_ screen.
+There is a specific Queue you can watch to see how long it will take to finish: **project_migrate_hashed_storage**
+
+After it reaches zero, you can confirm every project has been migrated by running the commands bellow. 
+If you find it necessary, you can run this migration script again to schedule missing projects.
+
+Any error or warning will be logged in the sidekiq's log file.
+
+You only need the `gitlab:storage:migrate_to_hashed` rake task to migrate your repositories, but we have additional
+commands below that helps you inspect projects and attachments in both legacy and hashed storage.
+
 ## List projects on Legacy storage
 
 To have a simple summary of projects using **Legacy** storage:
@@ -73,35 +106,73 @@ rake gitlab:storage:list_hashed_projects
 
 ```
 
-## Migrate existing projects to Hashed storage
+## List attachments on Legacy storage
 
-Before migrating your existing projects, you should 
-[enable hashed storage][storage-migration] for the new projects as well.
+To have a simple summary of project attachments using **Legacy** storage:
 
-This task will schedule all your existing projects to be migrated to the 
-**Hashed** storage type:
+**Omnibus Installation**
+
+```bash
+gitlab-rake gitlab:storage:legacy_attachments
+```
+
+**Source Installation**
+
+```bash
+rake gitlab:storage:legacy_attachments
+
+```
+
+------
+
+To list project attachments using **Legacy** storage:
 
 **Omnibus Installation**
 
 ```bash
-gitlab-rake gitlab:storage:migrate_to_hashed
+gitlab-rake gitlab:storage:list_legacy_attachments
 ```
 
 **Source Installation**
 
 ```bash
-rake gitlab:storage:migrate_to_hashed
+rake gitlab:storage:list_legacy_attachments
 
 ```
 
-You can monitor the progress in the _Admin > Monitoring > Background jobs_ screen.
-There is a specific Queue you can watch to see how long it will take to finish: **project_migrate_hashed_storage**
+## List attachments on Hashed storage
 
-After it reaches zero, you can confirm every project has been migrated by running the commands above.
-If you find it necessary, you can run this migration script again to schedule missing projects.
+To have a simple summary of project attachments using **Hashed** storage:
+
+**Omnibus Installation**
+
+```bash
+gitlab-rake gitlab:storage:hashed_attachments
+```
 
-Any error or warning will be logged in the sidekiq log file.
+**Source Installation**
+
+```bash
+rake gitlab:storage:hashed_attachments
+
+```
+
+------
+
+To list project attachments using **Hashed** storage:
+
+**Omnibus Installation**
 
+```bash
+gitlab-rake gitlab:storage:list_hashed_attachments
+```
+
+**Source Installation**
+
+```bash
+rake gitlab:storage:list_hashed_attachments
+
+```
 
 [storage-types]: ../repository_storage_types.md
 [storage-migration]: ../repository_storage_types.md#how-to-migrate-to-hashed-storage

ee/app/services/ee/projects/hashed_storage/migrate_attachments_service.rb

+module EE
+  module Projects
+    module HashedStorage
+      module MigrateAttachmentsService
+        def execute
+          raise NotImplementedError.new unless defined?(super)
+
+          super do
+            ::Geo::HashedStorageAttachmentsEventStore.new(
+              project,
+              old_attachments_path: old_path,
+              new_attachments_path: new_path
+            ).create
+          end
+        end
+      end
+    end
+  end
+end

ee/app/services/ee/projects/hashed_storage/migrate_repository_service.rb

+module EE
+  module Projects
+    module HashedStorage
+      module MigrateRepositoryService
+        def execute
+          raise NotImplementedError.new unless defined?(super)
+
+          super do
+            ::Geo::HashedStorageMigratedEventStore.new(
+              project,
+              old_storage_version: old_storage_version,
+              old_disk_path: old_disk_path,
+              old_wiki_disk_path: old_wiki_disk_path
+            ).create
+          end
+        end
+      end
+    end
+  end
+end

ee/app/services/ee/projects/hashed_storage_migration_service.rb

-module EE
-  module Projects
-    module HashedStorageMigrationService
-      def execute
-        raise NotImplementedError.new unless defined?(super)
-
-        super do
-          ::Geo::HashedStorageMigratedEventStore.new(
-            project,
-            old_storage_version: old_storage_version,
-            old_disk_path: old_disk_path,
-            old_wiki_disk_path: old_wiki_disk_path
-          ).create
-        end
-      end
-    end
-  end
-end

lib/gitlab/geo/log_cursor/daemon.rb

@@ -183,6 +183,23 @@ module Gitlab
             job_id: job_id)
         end
 
+        def handle_hashed_storage_attachments_event(event, created_at)
+          job_id = ::Geo::HashedStorageAttachmentsMigrationService.new(
+            event.project_id,
+            old_attachments_path: event.old_attachments_path,
+            new_attachments_path: event.new_attachments_path
+          ).async_execute
+
+          logger.event_info(
+            created_at,
+            message: 'Migrating attachments to hashed storage',
+            project_id: event.project_id,
+            old_attachments_path: event.old_attachments_path,
+            new_attachments_path: event.new_attachments_path,
+            job_id: job_id
+          )
+        end
+
         def handle_lfs_object_deleted_event(event, created_at)
           file_path = File.join(LfsObjectUploader.local_store_path, event.file_path)
 

lib/tasks/gitlab/storage.rake

@@ -2,10 +2,10 @@ namespace :gitlab do
   namespace :storage do
     desc 'GitLab | Storage | Migrate existing projects to Hashed Storage'
     task migrate_to_hashed: :environment do
-      legacy_projects_count = Project.with_legacy_storage.count
+      legacy_projects_count = Project.with_unmigrated_storage.count
 
       if legacy_projects_count == 0
-        puts 'There are no projects using legacy storage. Nothing to do!'
+        puts 'There are no projects requiring storage migration. Nothing to do!'
 
         next
       end
@@ -23,22 +23,42 @@ namespace :gitlab do
 
     desc 'Gitlab | Storage | Summary of existing projects using Legacy Storage'
     task legacy_projects: :environment do
-      projects_summary(Project.with_legacy_storage)
+      relation_summary('projects', Project.without_storage_feature(:repository))
     end
 
     desc 'Gitlab | Storage | List existing projects using Legacy Storage'
     task list_legacy_projects: :environment do
-      projects_list(Project.with_legacy_storage)
+      projects_list('projects using Legacy Storage', Project.without_storage_feature(:repository))
     end
 
     desc 'Gitlab | Storage | Summary of existing projects using Hashed Storage'
     task hashed_projects: :environment do
-      projects_summary(Project.with_hashed_storage)
+      relation_summary('projects using Hashed Storage', Project.with_storage_feature(:repository))
     end
 
     desc 'Gitlab | Storage | List existing projects using Hashed Storage'
     task list_hashed_projects: :environment do
-      projects_list(Project.with_hashed_storage)
+      projects_list('projects using Hashed Storage', Project.with_storage_feature(:repository))
+    end
+
+    desc 'Gitlab | Storage | Summary of project attachments using Legacy Storage'
+    task legacy_attachments: :environment do
+      relation_summary('attachments using Legacy Storage', legacy_attachments_relation)
+    end
+
+    desc 'Gitlab | Storage | List existing project attachments using Legacy Storage'
+    task list_legacy_attachments: :environment do
+      attachments_list('attachments using Legacy Storage', legacy_attachments_relation)
+    end
+
+    desc 'Gitlab | Storage | Summary of project attachments using Hashed Storage'
+    task hashed_attachments: :environment do
+      relation_summary('attachments using Hashed Storage', hashed_attachments_relation)
+    end
+
+    desc 'Gitlab | Storage | List existing project attachments using Hashed Storage'
+    task list_hashed_attachments: :environment do
+      attachments_list('attachments using Hashed Storage', hashed_attachments_relation)
     end
 
     def batch_size
@@ -46,29 +66,43 @@ namespace :gitlab do
     end
 
     def project_id_batches(&block)
-      Project.with_legacy_storage.in_batches(of: batch_size, start: ENV['ID_FROM'], finish: ENV['ID_TO']) do |relation| # rubocop: disable Cop/InBatches
+      Project.with_unmigrated_storage.in_batches(of: batch_size, start: ENV['ID_FROM'], finish: ENV['ID_TO']) do |relation| # rubocop: disable Cop/InBatches
         ids = relation.pluck(:id)
 
         yield ids.min, ids.max
       end
     end
 
-    def projects_summary(relation)
-      projects_count = relation.count
-      puts "* Found #{projects_count} projects".color(:green)
+    def legacy_attachments_relation
+      Upload.joins(<<~SQL).where('projects.storage_version < :version OR projects.storage_version IS NULL', version: Project::HASHED_STORAGE_FEATURES[:attachments])
+        JOIN projects
+          ON (uploads.model_type='Project' AND uploads.model_id=projects.id)
+      SQL
+    end
+
+    def hashed_attachments_relation
+      Upload.joins(<<~SQL).where('projects.storage_version >= :version', version: Project::HASHED_STORAGE_FEATURES[:attachments])
+        JOIN projects
+        ON (uploads.model_type='Project' AND uploads.model_id=projects.id)
+      SQL
+    end
+
+    def relation_summary(relation_name, relation)
+      relation_count = relation.count
+      puts "* Found #{relation_count} #{relation_name}".color(:green)
 
-      projects_count
+      relation_count
     end
 
-    def projects_list(relation)
-      projects_count = projects_summary(relation)
+    def projects_list(relation_name, relation)
+      relation_count = relation_summary(relation_name, relation)
 
       projects = relation.with_route
       limit = ENV.fetch('LIMIT', 500).to_i
 
-      return unless projects_count > 0
+      return unless relation_count > 0
 
-      puts "  ! Displaying first #{limit} projects..." if projects_count > limit
+      puts "  ! Displaying first #{limit} #{relation_name}..." if relation_count > limit
 
       counter = 0
       projects.find_in_batches(batch_size: batch_size) do |batch|
@@ -81,5 +115,26 @@ namespace :gitlab do
         end
       end
     end
+
+    def attachments_list(relation_name, relation)
+      relation_count = relation_summary(relation_name, relation)
+
+      limit = ENV.fetch('LIMIT', 500).to_i
+
+      return unless relation_count > 0
+
+      puts "  ! Displaying first #{limit} #{relation_name}..." if relation_count > limit
+
+      counter = 0
+      relation.find_in_batches(batch_size: batch_size) do |batch|
+        batch.each do |upload|
+          counter += 1
+
+          puts "  - #{upload.path} (id: #{upload.id})".color(:red)
+
+          return if counter >= limit # rubocop:disable Lint/NonLocalExitFromIterator
+        end
+      end
+    end
   end
 end

spec/ee/spec/services/ee/projects/hashed_storage/migrate_attachments_service_spec.rb

+require 'spec_helper'
+
+describe Projects::HashedStorage::MigrateAttachmentsService do
+  let(:project) { create(:project, storage_version: 1) }
+  let(:service) { described_class.new(project) }
+  let(:legacy_storage) { Storage::LegacyProject.new(project) }
+  let(:hashed_storage) { Storage::HashedProject.new(project) }
+  let(:old_attachments_path) { legacy_storage.disk_path }
+  let(:new_attachments_path) { hashed_storage.disk_path }
+
+  describe '#execute' do
+    set(:primary) { create(:geo_node, :primary) }
+    set(:secondary) { create(:geo_node) }
+
+    context 'on success' do
+      before do
+        FileUtils.mkdir_p(FileUploader.dynamic_path_builder(old_attachments_path))
+      end
+
+      it 'returns true' do
+        expect(service.execute).to be_truthy
+      end
+
+      it 'creates a Geo::HashedStorageAttachmentsEvent' do
+        expect { service.execute }.to change(Geo::EventLog, :count).by(1)
+
+        event = Geo::EventLog.first.event
+
+        expect(event).to be_a(Geo::HashedStorageAttachmentsEvent)
+        expect(event).to have_attributes(
+          old_attachments_path: old_attachments_path,
+          new_attachments_path: new_attachments_path
+        )
+      end
+    end
+
+    context 'on failure' do
+      it 'does not create a Geo event when skipped' do
+        expect { service.execute }.not_to change { Geo::EventLog.count }
+      end
+
+      it 'does not create a Geo event on failure' do
+        expect(service).to receive(:move_folder!).and_raise(::Projects::HashedStorage::AttachmentMigrationError)
+        expect { service.execute }.to raise_error(::Projects::HashedStorage::AttachmentMigrationError)
+        expect(Geo::EventLog.count).to eq(0)
+      end
+    end
+  end
+end

spec/ee/spec/services/ee/projects/hashed_storage_migration_service_spec.rb → spec/ee/spec/services/ee/projects/hashed_storage/migrate_repository_service_spec.rb

 require 'spec_helper'
 
-describe Projects::HashedStorageMigrationService do
+describe Projects::HashedStorage::MigrateRepositoryService do
   let(:project) { create(:project, :empty_repo, :wiki_repo) }
   let(:service) { described_class.new(project) }
   let(:legacy_storage) { Storage::LegacyProject.new(project) }
@@ -18,7 +18,7 @@ describe Projects::HashedStorageMigrationService do
       expect(event).to be_a(Geo::HashedStorageMigratedEvent)
       expect(event).to have_attributes(
         old_storage_version: nil,
-        new_storage_version: Storage::HashedProject::STORAGE_VERSION,
+        new_storage_version: ::Project::HASHED_STORAGE_FEATURES[:repository],
         old_disk_path: legacy_storage.disk_path,
         new_disk_path: hashed_storage.disk_path,
         old_wiki_disk_path: legacy_storage.disk_path + '.wiki',

spec/factories/geo/event_log.rb

@@ -20,6 +20,10 @@ FactoryGirl.define do
       hashed_storage_migrated_event factory: :geo_hashed_storage_migrated_event
     end
 
+    trait :hashed_storage_attachments_event do
+      hashed_storage_attachments_event factory: :geo_hashed_storage_attachments_event
+    end
+
     trait :lfs_object_deleted_event do
       lfs_object_deleted_event factory: :geo_lfs_object_deleted_event
     end
@@ -78,7 +82,14 @@ FactoryGirl.define do
     new_disk_path { project.path_with_namespace + '_new' }
     old_wiki_disk_path { project.wiki.path_with_namespace }
     new_wiki_disk_path { project.wiki.path_with_namespace + '_new' }
-    new_storage_version { Project::LATEST_STORAGE_VERSION }
+    new_storage_version { Project::HASHED_STORAGE_FEATURES[:repository] }
+  end
+
+  factory :geo_hashed_storage_attachments_event, class: Geo::HashedStorageAttachmentsEvent do
+    project { create(:project, :repository) }
+
+    old_attachments_path { Storage::LegacyProject.new(project).disk_path }
+    new_attachments_path { Storage::HashedProject.new(project).disk_path }
   end
 
   factory :geo_lfs_object_deleted_event, class: Geo::LfsObjectDeletedEvent do

spec/lib/gitlab/geo/log_cursor/daemon_spec.rb

@@ -253,6 +253,27 @@ describe Gitlab::Geo::LogCursor::Daemon, :postgresql, :clean_gitlab_redis_shared
       end
     end
 
+    context 'when processing an attachment migration event to hashed storage' do
+      let(:event_log) { create(:geo_event_log, :hashed_storage_attachments_event) }
+      let!(:event_log_state) { create(:geo_event_log_state, event_id: event_log.id - 1) }
+      let(:hashed_storage_attachments_event) { event_log.hashed_storage_attachments_event }
+
+      it 'does not create a new project registry' do
+        expect { daemon.run_once! }.not_to change(Geo::ProjectRegistry, :count)
+      end
+
+      it 'schedules a Geo::HashedStorageAttachmentsMigrationWorker' do
+        project = hashed_storage_attachments_event.project
+        old_attachments_path = hashed_storage_attachments_event.old_attachments_path
+        new_attachments_path = hashed_storage_attachments_event.new_attachments_path
+
+        expect(::Geo::HashedStorageAttachmentsMigrationWorker).to receive(:perform_async)
+          .with(project.id, old_attachments_path, new_attachments_path)
+
+        daemon.run_once!
+      end
+    end
+
     context 'when replaying a LFS object deleted event' do
       let(:event_log) { create(:geo_event_log, :lfs_object_deleted_event) }
       let!(:event_log_state) { create(:geo_event_log_state, event_id: event_log.id - 1) }

spec/services/geo/hashed_storage_attachments_event_store_spec.rb

+require 'spec_helper'
+
+describe Geo::HashedStorageAttachmentsEventStore do
+  let(:project) { create(:project, :hashed, path: 'bar') }
+  let(:attachments_event) { build(:geo_hashed_storage_attachments_event, project: project) }
+  set(:secondary_node) { create(:geo_node) }
+  let(:old_attachments_path) { attachments_event.old_attachments_path }
+  let(:new_attachments_path) {attachments_event.new_attachments_path }
+
+  subject(:event_store) { described_class.new(project, old_storage_version: 1, new_storage_version: 2, old_attachments_path: old_attachments_path, new_attachments_path: new_attachments_path) }
+
+  describe '#create' do
+    it 'does not create an event when not running on a primary node' do
+      allow(Gitlab::Geo).to receive(:primary?) { false }
+
+      expect { event_store.create }.not_to change(Geo::HashedStorageAttachmentsEvent, :count)
+    end
+
+    context 'when running on a primary node' do
+      before do
+        allow(Gitlab::Geo).to receive(:primary?) { true }
+      end
+
+      it 'does not create an event when there are no secondary nodes' do
+        allow(Gitlab::Geo).to receive(:secondary_nodes) { [] }
+
+        expect { event_store.create }.not_to change(Geo::HashedStorageAttachmentsEvent, :count)
+      end
+
+      it 'creates a attachment migration event' do
+        expect { event_store.create }.to change(Geo::HashedStorageAttachmentsEvent, :count).by(1)
+      end
+
+      it 'tracks project attributes' do
+        event_store.create
+
+        event = Geo::HashedStorageAttachmentsEvent.last
+
+        expect(event).to have_attributes(
+          old_attachments_path: old_attachments_path,
+          new_attachments_path: new_attachments_path
+        )
+      end
+    end
+  end
+end

spec/services/geo/hashed_storage_attachments_migration_service_spec.rb

+require 'spec_helper'
+
+describe Geo::HashedStorageAttachmentsMigrationService do
+  let!(:project) { create(:project) }
+
+  let(:legacy_storage) { Storage::LegacyProject.new(project) }
+  let(:hashed_storage) { Storage::HashedProject.new(project) }
+
+  let!(:upload) { Upload.find_by(path: file_uploader.relative_path) }
+  let(:file_uploader) { build(:file_uploader, project: project) }
+  let(:old_path) { File.join(base_path(legacy_storage), upload.path) }
+  let(:new_path) { File.join(base_path(hashed_storage), upload.path) }
+
+  subject(:service) { described_class.new(project.id, old_attachments_path: legacy_storage.disk_path, new_attachments_path: hashed_storage.disk_path) }
+
+  describe '#execute' do
+    context 'when succeeds' do
+      it 'moves attachments to hashed storage layout' do
+        expect(File.file?(old_path)).to be_truthy
+        expect(File.file?(new_path)).to be_falsey
+        expect(File.exist?(base_path(legacy_storage))).to be_truthy
+        expect(File.exist?(base_path(hashed_storage))).to be_falsey
+        expect(FileUtils).to receive(:mv).with(base_path(legacy_storage), base_path(hashed_storage)).and_call_original
+
+        service.execute
+
+        expect(File.exist?(base_path(hashed_storage))).to be_truthy
+        expect(File.exist?(base_path(legacy_storage))).to be_falsey
+        expect(File.file?(old_path)).to be_falsey
+        expect(File.file?(new_path)).to be_truthy
+      end
+    end
+
+    context 'when original folder does not exist anymore' do
+      before do
+        FileUtils.rm_rf(base_path(legacy_storage))
+      end
+
+      it 'skips moving folders and go to next' do
+        expect(FileUtils).not_to receive(:mv).with(base_path(legacy_storage), base_path(hashed_storage))
+
+        service.execute
+
+        expect(File.exist?(base_path(hashed_storage))).to be_falsey
+        expect(File.file?(new_path)).to be_falsey
+      end
+    end
+
+    context 'when target folder already exists' do
+      before do
+        FileUtils.mkdir_p(base_path(hashed_storage))
+      end
+
+      it 'raises AttachmentMigrationError' do
+        expect(FileUtils).not_to receive(:mv).with(base_path(legacy_storage), base_path(hashed_storage))
+
+        expect { service.execute }.to raise_error(::Geo::AttachmentMigrationError)
+      end
+    end
+  end
+
+  describe '#async_execute' do
+    it 'starts the worker' do
+      expect(Geo::HashedStorageAttachmentsMigrationWorker).to receive(:perform_async)
+
+      service.async_execute
+    end
+
+    it 'returns job id' do
+      allow(Geo::HashedStorageAttachmentsMigrationWorker).to receive(:perform_async).and_return('foo')
+
+      expect(service.async_execute).to eq('foo')
+    end
+  end
+
+  def base_path(storage)
+    File.join(CarrierWave.root, FileUploader.base_dir, storage.disk_path)
+  end
+end

spec/services/geo/hashed_storage_migration_service_spec.rb

@@ -10,7 +10,7 @@ describe Geo::HashedStorageMigrationService do
   describe '#execute' do
     context 'project backed by legacy storage' do
       before do
-        project.update_attribute(:storage_version, Project::LATEST_STORAGE_VERSION)
+        project.update_attribute(:storage_version, Project::HASHED_STORAGE_FEATURES[:repository])
       end
 
       it 'moves the project repositories' do

spec/services/projects/hashed_storage/migrate_attachments_service_spec.rb

+require 'spec_helper'
+
+describe Projects::HashedStorage::MigrateAttachmentsService do
+  subject(:service) { described_class.new(project) }
+  let(:project) { create(:project) }
+  let(:legacy_storage) { Storage::LegacyProject.new(project) }
+  let(:hashed_storage) { Storage::HashedProject.new(project) }
+
+  let!(:upload) { Upload.find_by(path: file_uploader.relative_path) }
+  let(:file_uploader) { build(:file_uploader, project: project) }
+  let(:old_path) { File.join(base_path(legacy_storage), upload.path) }
+  let(:new_path) { File.join(base_path(hashed_storage), upload.path) }
+
+  context '#execute' do
+    context 'when succeeds' do
+      it 'moves attachments to hashed storage layout' do
+        expect(File.file?(old_path)).to be_truthy
+        expect(File.file?(new_path)).to be_falsey
+        expect(File.exist?(base_path(legacy_storage))).to be_truthy
+        expect(File.exist?(base_path(hashed_storage))).to be_falsey
+        expect(FileUtils).to receive(:mv).with(base_path(legacy_storage), base_path(hashed_storage)).and_call_original
+
+        service.execute
+
+        expect(File.exist?(base_path(hashed_storage))).to be_truthy
+        expect(File.exist?(base_path(legacy_storage))).to be_falsey
+        expect(File.file?(old_path)).to be_falsey
+        expect(File.file?(new_path)).to be_truthy
+      end
+    end
+
+    context 'when original folder does not exist anymore' do
+      before do
+        FileUtils.rm_rf(base_path(legacy_storage))
+      end
+
+      it 'skips moving folders and go to next' do
+        expect(FileUtils).not_to receive(:mv).with(base_path(legacy_storage), base_path(hashed_storage))
+
+        service.execute
+
+        expect(File.exist?(base_path(hashed_storage))).to be_falsey
+        expect(File.file?(new_path)).to be_falsey
+      end
+    end
+
+    context 'when target folder already exists' do
+      before do
+        FileUtils.mkdir_p(base_path(hashed_storage))
+      end
+
+      it 'raises AttachmentMigrationError' do
+        expect(FileUtils).not_to receive(:mv).with(base_path(legacy_storage), base_path(hashed_storage))
+
+        expect { service.execute }.to raise_error(Projects::HashedStorage::AttachmentMigrationError)
+      end
+    end
+  end
+
+  def base_path(storage)
+    FileUploader.dynamic_path_builder(storage.disk_path)
+  end
+end

spec/services/projects/hashed_storage/migrate_repository_service_spec.rb

+require 'spec_helper'
+
+describe Projects::HashedStorage::MigrateRepositoryService do
+  let(:gitlab_shell) { Gitlab::Shell.new }
+  let(:project) { create(:project, :empty_repo, :wiki_repo) }
+  let(:service) { described_class.new(project) }
+  let(:legacy_storage) { Storage::LegacyProject.new(project) }
+  let(:hashed_storage) { Storage::HashedProject.new(project) }
+
+  describe '#execute' do
+    before do
+      allow(service).to receive(:gitlab_shell) { gitlab_shell }
+    end
+
+    context 'when succeeds' do
+      it 'renames project and wiki repositories' do
+        service.execute
+
+        expect(gitlab_shell.exists?(project.repository_storage_path, "#{hashed_storage.disk_path}.git")).to be_truthy
+        expect(gitlab_shell.exists?(project.repository_storage_path, "#{hashed_storage.disk_path}.wiki.git")).to be_truthy
+      end
+
+      it 'updates project to be hashed and not read-only' do
+        service.execute
+
+        expect(project.hashed_storage?(:repository)).to be_truthy
+        expect(project.repository_read_only).to be_falsey
+      end
+
+      it 'move operation is called for both repositories' do
+        expect_move_repository(project.disk_path, hashed_storage.disk_path)
+        expect_move_repository("#{project.disk_path}.wiki", "#{hashed_storage.disk_path}.wiki")
+
+        service.execute
+      end
+    end
+
+    context 'when one move fails' do
+      it 'rollsback repositories to original name' do
+        from_name = project.disk_path
+        to_name = hashed_storage.disk_path
+        allow(service).to receive(:move_repository).and_call_original
+        allow(service).to receive(:move_repository).with(from_name, to_name).once { false } # will disable first move only
+
+        expect(service).to receive(:rollback_folder_move).and_call_original
+
+        service.execute
+
+        expect(gitlab_shell.exists?(project.repository_storage_path, "#{hashed_storage.disk_path}.git")).to be_falsey
+        expect(gitlab_shell.exists?(project.repository_storage_path, "#{hashed_storage.disk_path}.wiki.git")).to be_falsey
+        expect(project.repository_read_only?).to be_falsey
+      end
+
+      context 'when rollback fails' do
+        let(:from_name) { legacy_storage.disk_path }
+        let(:to_name) { hashed_storage.disk_path }
+
+        before do
+          hashed_storage.ensure_storage_path_exists
+          gitlab_shell.mv_repository(project.repository_storage_path, from_name, to_name)
+        end
+
+        it 'does not try to move nil repository over hashed' do
+          expect(gitlab_shell).not_to receive(:mv_repository).with(project.repository_storage_path, from_name, to_name)
+          expect_move_repository("#{project.disk_path}.wiki", "#{hashed_storage.disk_path}.wiki")
+
+          service.execute
+        end
+      end
+    end
+
+    def expect_move_repository(from_name, to_name)
+      expect(gitlab_shell).to receive(:mv_repository).with(project.repository_storage_path, from_name, to_name).and_call_original
+    end
+  end
+end

spec/services/projects/hashed_storage_migration_service_spec.rb

 require 'spec_helper'
 
 describe Projects::HashedStorageMigrationService do
-  let(:gitlab_shell) { Gitlab::Shell.new }
   let(:project) { create(:project, :empty_repo, :wiki_repo) }
-  let(:service) { described_class.new(project) }
-  let(:legacy_storage) { Storage::LegacyProject.new(project) }
-  let(:hashed_storage) { Storage::HashedProject.new(project) }
+  subject(:service) { described_class.new(project) }
 
   describe '#execute' do
-    before do
-      allow(service).to receive(:gitlab_shell) { gitlab_shell }
-    end
-
-    context 'when succeeds' do
-      it 'renames project and wiki repositories' do
-        service.execute
+    context 'repository migration' do
+      let(:repository_service) { Projects::HashedStorage::MigrateRepositoryService.new(project, subject.logger) }
 
-        expect(gitlab_shell.exists?(project.repository_storage_path, "#{hashed_storage.disk_path}.git")).to be_truthy
-        expect(gitlab_shell.exists?(project.repository_storage_path, "#{hashed_storage.disk_path}.wiki.git")).to be_truthy
-      end
+      it 'delegates migration to Projects::HashedStorage::MigrateRepositoryService' do
+        expect(Projects::HashedStorage::MigrateRepositoryService).to receive(:new).with(project, subject.logger).and_return(repository_service)
+        expect(repository_service).to receive(:execute)
 
-      it 'updates project to be hashed and not read-only' do
         service.execute
-
-        expect(project.hashed_storage?(:repository)).to be_truthy
-        expect(project.repository_read_only).to be_falsey
       end
 
-      it 'move operation is called for both repositories' do
-        expect_move_repository(project.disk_path, hashed_storage.disk_path)
-        expect_move_repository("#{project.disk_path}.wiki", "#{hashed_storage.disk_path}.wiki")
+      it 'does not delegate migration if repository is already migrated' do
+        project.storage_version = ::Project::LATEST_STORAGE_VERSION
+        expect(Projects::HashedStorage::MigrateRepositoryService).not_to receive(:new)
 
         service.execute
       end
     end
 
-    context 'when one move fails' do
-      it 'rollsback repositories to original name' do
-        from_name = project.disk_path
-        to_name = hashed_storage.disk_path
-        allow(service).to receive(:move_repository).and_call_original
-        allow(service).to receive(:move_repository).with(from_name, to_name).once { false } # will disable first move only
+    context 'attachments migration' do
+      let(:attachments_service) { Projects::HashedStorage::MigrateAttachmentsService.new(project, subject.logger) }
 
-        expect(service).to receive(:rollback_folder_move).and_call_original
+      it 'delegates migration to Projects::HashedStorage::MigrateRepositoryService' do
+        expect(Projects::HashedStorage::MigrateAttachmentsService).to receive(:new).with(project, subject.logger).and_return(attachments_service)
+        expect(attachments_service).to receive(:execute)
 
         service.execute
-
-        expect(gitlab_shell.exists?(project.repository_storage_path, "#{hashed_storage.disk_path}.git")).to be_falsey
-        expect(gitlab_shell.exists?(project.repository_storage_path, "#{hashed_storage.disk_path}.wiki.git")).to be_falsey
       end
 
-      context 'when rollback fails' do
-        before do
-          from_name = legacy_storage.disk_path
-          to_name = hashed_storage.disk_path
-
-          hashed_storage.ensure_storage_path_exists
-          gitlab_shell.mv_repository(project.repository_storage_path, from_name, to_name)
-        end
-
-        it 'does not try to move nil repository over hashed' do
-          expect_move_repository("#{project.disk_path}.wiki", "#{hashed_storage.disk_path}.wiki")
+      it 'does not delegate migration if attachments are already migrated' do
+        project.storage_version = ::Project::LATEST_STORAGE_VERSION
+        expect(Projects::HashedStorage::MigrateAttachmentsService).not_to receive(:new)
 
         service.execute
       end
     end
   end
-
-    def expect_move_repository(from_name, to_name)
-      expect(gitlab_shell).to receive(:mv_repository).with(project.repository_storage_path, from_name, to_name).and_call_original
-    end
-  end
 end

spec/workers/project_migrate_hashed_storage_worker_spec.rb

 require 'spec_helper'
 
-describe ProjectMigrateHashedStorageWorker do
+describe ProjectMigrateHashedStorageWorker, :clean_gitlab_redis_shared_state do
   describe '#perform' do
     let(:project) { create(:project, :empty_repo) }
     let(:pending_delete_project) { create(:project, :empty_repo, pending_delete: true) }
 
+    context 'when have exclusive lease' do
+      before do
+        lease = subject.lease_for(project.id)
+
+        allow(Gitlab::ExclusiveLease).to receive(:new).and_return(lease)
+        allow(lease).to receive(:try_obtain).and_return(true)
+      end
+
       it 'skips when project no longer exists' do
         nonexistent_id = 999999999999
 
@@ -26,4 +34,20 @@ describe ProjectMigrateHashedStorageWorker do
         subject.perform(project.id)
       end
     end
+
+    context 'when dont have exclusive lease' do
+      before do
+        lease = subject.lease_for(project.id)
+
+        allow(Gitlab::ExclusiveLease).to receive(:new).and_return(lease)
+        allow(lease).to receive(:try_obtain).and_return(false)
+      end
+
+      it 'skips when dont have lease' do
+        expect(::Projects::HashedStorageMigrationService).not_to receive(:new)
+
+        subject.perform(project.id)
+      end
+    end
+  end
 end