services/api/app/models/container.rb

   1 # Copyright (C) The Arvados Authors. All rights reserved.
   2 #
   3 # SPDX-License-Identifier: AGPL-3.0
   4
   5 require 'log_reuse_info'
   6 require 'whitelist_update'
   7 require 'safe_json'
   8 require 'update_priority'
   9
  10 class Container < ArvadosModel
  11   include ArvadosModelUpdates
  12   include HasUuid
  13   include KindAndEtag
  14   include CommonApiTemplate
  15   include WhitelistUpdate
  16   extend CurrentApiClient
  17   extend DbCurrentTime
  18   extend LogReuseInfo
  19
  20   # Posgresql JSONB columns should NOT be declared as serialized, Rails 5
  21   # already know how to properly treat them.
  22   attribute :secret_mounts, :jsonbHash, default: {}
  23   attribute :runtime_status, :jsonbHash, default: {}
  24   attribute :runtime_auth_scopes, :jsonbHash, default: {}
  25
  26   serialize :environment, Hash
  27   serialize :mounts, Hash
  28   serialize :runtime_constraints, Hash
  29   serialize :command, Array
  30   serialize :scheduling_parameters, Hash
  31
  32   before_validation :fill_field_defaults, :if => :new_record?
  33   before_validation :set_timestamps
  34   before_validation :check_lock
  35   before_validation :check_unlock
  36   validates :command, :container_image, :output_path, :cwd, :priority, { presence: true }
  37   validates :priority, numericality: { only_integer: true, greater_than_or_equal_to: 0 }
  38   validate :validate_runtime_status
  39   validate :validate_state_change
  40   validate :validate_change
  41   validate :validate_lock
  42   validate :validate_output
  43   after_validation :assign_auth
  44   before_save :sort_serialized_attrs
  45   before_save :update_secret_mounts_md5
  46   before_save :scrub_secrets
  47   before_save :clear_runtime_status_when_queued
  48   after_save :update_cr_logs
  49   after_save :handle_completed
  50   after_save :propagate_priority
  51   after_commit { UpdatePriority.run_update_thread }
  52
  53   has_many :container_requests, :foreign_key => :container_uuid, :class_name => 'ContainerRequest', :primary_key => :uuid
  54   belongs_to :auth, :class_name => 'ApiClientAuthorization', :foreign_key => :auth_uuid, :primary_key => :uuid
  55
  56   api_accessible :user, extend: :common do |t|
  57     t.add :command
  58     t.add :container_image
  59     t.add :cwd
  60     t.add :environment
  61     t.add :exit_code
  62     t.add :finished_at
  63     t.add :locked_by_uuid
  64     t.add :log
  65     t.add :mounts
  66     t.add :output
  67     t.add :output_path
  68     t.add :priority
  69     t.add :progress
  70     t.add :runtime_constraints
  71     t.add :runtime_status
  72     t.add :started_at
  73     t.add :state
  74     t.add :auth_uuid
  75     t.add :scheduling_parameters
  76     t.add :runtime_user_uuid
  77     t.add :runtime_auth_scopes
  78     t.add :lock_count
  79     t.add :gateway_address
  80   end
  81
  82   # Supported states for a container
  83   States =
  84     [
  85      (Queued = 'Queued'),
  86      (Locked = 'Locked'),
  87      (Running = 'Running'),
  88      (Complete = 'Complete'),
  89      (Cancelled = 'Cancelled')
  90     ]
  91
  92   State_transitions = {
  93     nil => [Queued],
  94     Queued => [Locked, Cancelled],
  95     Locked => [Queued, Running, Cancelled],
  96     Running => [Complete, Cancelled],
  97     Complete => [Cancelled]
  98   }
  99
 100   def self.limit_index_columns_read
 101     ["mounts"]
 102   end
 103
 104   def self.full_text_searchable_columns
 105     super - ["secret_mounts", "secret_mounts_md5", "runtime_token", "gateway_address"]
 106   end
 107
 108   def self.searchable_columns *args
 109     super - ["secret_mounts_md5", "runtime_token", "gateway_address"]
 110   end
 111
 112   def logged_attributes
 113     super.except('secret_mounts', 'runtime_token')
 114   end
 115
 116   def state_transitions
 117     State_transitions
 118   end
 119
 120   # Container priority is the highest "computed priority" of any
 121   # matching request. The computed priority of a container-submitted
 122   # request is the priority of the submitting container. The computed
 123   # priority of a user-submitted request is a function of
 124   # user-assigned priority and request creation time.
 125   def update_priority!
 126     return if ![Queued, Locked, Running].include?(state)
 127     p = ContainerRequest.
 128         where('container_uuid=? and priority>0', uuid).
 129         includes(:requesting_container).
 130         lock(true).
 131         map do |cr|
 132       if cr.requesting_container
 133         cr.requesting_container.priority
 134       else
 135         (cr.priority << 50) - (cr.created_at.to_time.to_f * 1000).to_i
 136       end
 137     end.max || 0
 138     update_attributes!(priority: p)
 139   end
 140
 141   def propagate_priority
 142     return true unless saved_change_to_priority?
 143     act_as_system_user do
 144       # Update the priority of child container requests to match new
 145       # priority of the parent container (ignoring requests with no
 146       # container assigned, because their priority doesn't matter).
 147       ContainerRequest.
 148         where(requesting_container_uuid: self.uuid,
 149               state: ContainerRequest::Committed).
 150         where('container_uuid is not null').
 151         includes(:container).
 152         map(&:container).
 153         map(&:update_priority!)
 154     end
 155   end
 156
 157   # Create a new container (or find an existing one) to satisfy the
 158   # given container request.
 159   def self.resolve(req)
 160     if req.runtime_token.nil?
 161       runtime_user = if req.modified_by_user_uuid.nil?
 162                        current_user
 163                      else
 164                        User.find_by_uuid(req.modified_by_user_uuid)
 165                      end
 166       runtime_auth_scopes = ["all"]
 167     else
 168       auth = ApiClientAuthorization.validate(token: req.runtime_token)
 169       if auth.nil?
 170         raise ArgumentError.new "Invalid runtime token"
 171       end
 172       runtime_user = User.find_by_id(auth.user_id)
 173       runtime_auth_scopes = auth.scopes
 174     end
 175     c_attrs = act_as_user runtime_user do
 176       {
 177         command: req.command,
 178         cwd: req.cwd,
 179         environment: req.environment,
 180         output_path: req.output_path,
 181         container_image: resolve_container_image(req.container_image),
 182         mounts: resolve_mounts(req.mounts),
 183         runtime_constraints: resolve_runtime_constraints(req.runtime_constraints),
 184         scheduling_parameters: req.scheduling_parameters,
 185         secret_mounts: req.secret_mounts,
 186         runtime_token: req.runtime_token,
 187         runtime_user_uuid: runtime_user.uuid,
 188         runtime_auth_scopes: runtime_auth_scopes
 189       }
 190     end
 191     act_as_system_user do
 192       if req.use_existing && (reusable = find_reusable(c_attrs))
 193         reusable
 194       else
 195         Container.create!(c_attrs)
 196       end
 197     end
 198   end
 199
 200   # Return a runtime_constraints hash that complies with requested but
 201   # is suitable for saving in a container record, i.e., has specific
 202   # values instead of ranges.
 203   #
 204   # Doing this as a step separate from other resolutions, like "git
 205   # revision range to commit hash", makes sense only when there is no
 206   # opportunity to reuse an existing container (e.g., container reuse
 207   # is not implemented yet, or we have already found that no existing
 208   # containers are suitable).
 209   def self.resolve_runtime_constraints(runtime_constraints)
 210     rc = {}
 211     defaults = {
 212       'keep_cache_ram' =>
 213       Rails.configuration.Containers.DefaultKeepCacheRAM,
 214     }
 215     defaults.merge(runtime_constraints).each do |k, v|
 216       if v.is_a? Array
 217         rc[k] = v[0]
 218       else
 219         rc[k] = v
 220       end
 221     end
 222     rc
 223   end
 224
 225   # Return a mounts hash suitable for a Container, i.e., with every
 226   # readonly collection UUID resolved to a PDH.
 227   def self.resolve_mounts(mounts)
 228     c_mounts = {}
 229     mounts.each do |k, mount|
 230       mount = mount.dup
 231       c_mounts[k] = mount
 232       if mount['kind'] != 'collection'
 233         next
 234       end
 235
 236       uuid = mount.delete 'uuid'
 237
 238       if mount['portable_data_hash'].nil? and !uuid.nil?
 239         # PDH not supplied, try by UUID
 240         c = Collection.
 241           readable_by(current_user).
 242           where(uuid: uuid).
 243           select(:portable_data_hash).
 244           first
 245         if !c
 246           raise ArvadosModel::UnresolvableContainerError.new "cannot mount collection #{uuid.inspect}: not found"
 247         end
 248         mount['portable_data_hash'] = c.portable_data_hash
 249       end
 250     end
 251     return c_mounts
 252   end
 253
 254   # Return a container_image PDH suitable for a Container.
 255   def self.resolve_container_image(container_image)
 256     coll = Collection.for_latest_docker_image(container_image)
 257     if !coll
 258       raise ArvadosModel::UnresolvableContainerError.new "docker image #{container_image.inspect} not found"
 259     end
 260     coll.portable_data_hash
 261   end
 262
 263   def self.find_reusable(attrs)
 264     log_reuse_info { "starting with #{Container.all.count} container records in database" }
 265     candidates = Container.where_serialized(:command, attrs[:command], md5: true)
 266     log_reuse_info(candidates) { "after filtering on command #{attrs[:command].inspect}" }
 267
 268     candidates = candidates.where('cwd = ?', attrs[:cwd])
 269     log_reuse_info(candidates) { "after filtering on cwd #{attrs[:cwd].inspect}" }
 270
 271     candidates = candidates.where_serialized(:environment, attrs[:environment], md5: true)
 272     log_reuse_info(candidates) { "after filtering on environment #{attrs[:environment].inspect}" }
 273
 274     candidates = candidates.where('output_path = ?', attrs[:output_path])
 275     log_reuse_info(candidates) { "after filtering on output_path #{attrs[:output_path].inspect}" }
 276
 277     image = resolve_container_image(attrs[:container_image])
 278     candidates = candidates.where('container_image = ?', image)
 279     log_reuse_info(candidates) { "after filtering on container_image #{image.inspect} (resolved from #{attrs[:container_image].inspect})" }
 280
 281     candidates = candidates.where_serialized(:mounts, resolve_mounts(attrs[:mounts]), md5: true)
 282     log_reuse_info(candidates) { "after filtering on mounts #{attrs[:mounts].inspect}" }
 283
 284     secret_mounts_md5 = Digest::MD5.hexdigest(SafeJSON.dump(self.deep_sort_hash(attrs[:secret_mounts])))
 285     candidates = candidates.where('secret_mounts_md5 = ?', secret_mounts_md5)
 286     log_reuse_info(candidates) { "after filtering on secret_mounts_md5 #{secret_mounts_md5.inspect}" }
 287
 288     candidates = candidates.where_serialized(:runtime_constraints, resolve_runtime_constraints(attrs[:runtime_constraints]), md5: true)
 289     log_reuse_info(candidates) { "after filtering on runtime_constraints #{attrs[:runtime_constraints].inspect}" }
 290
 291     log_reuse_info { "checking for state=Complete with readable output and log..." }
 292
 293     select_readable_pdh = Collection.
 294       readable_by(current_user).
 295       select(:portable_data_hash).
 296       to_sql
 297
 298     usable = candidates.where(state: Complete, exit_code: 0)
 299     log_reuse_info(usable) { "with state=Complete, exit_code=0" }
 300
 301     usable = usable.where("log IN (#{select_readable_pdh})")
 302     log_reuse_info(usable) { "with readable log" }
 303
 304     usable = usable.where("output IN (#{select_readable_pdh})")
 305     log_reuse_info(usable) { "with readable output" }
 306
 307     usable = usable.order('finished_at ASC').limit(1).first
 308     if usable
 309       log_reuse_info { "done, reusing container #{usable.uuid} with state=Complete" }
 310       return usable
 311     end
 312
 313     # Check for non-failing Running candidates and return the most likely to finish sooner.
 314     log_reuse_info { "checking for state=Running..." }
 315     running = candidates.where(state: Running).
 316               where("(runtime_status->'error') is null").
 317               order('progress desc, started_at asc').
 318               limit(1).first
 319     if running
 320       log_reuse_info { "done, reusing container #{running.uuid} with state=Running" }
 321       return running
 322     else
 323       log_reuse_info { "have no containers in Running state" }
 324     end
 325
 326     # Check for Locked or Queued ones and return the most likely to start first.
 327     locked_or_queued = candidates.
 328                        where("state IN (?)", [Locked, Queued]).
 329                        order('state asc, priority desc, created_at asc').
 330                        limit(1).first
 331     if locked_or_queued
 332       log_reuse_info { "done, reusing container #{locked_or_queued.uuid} with state=#{locked_or_queued.state}" }
 333       return locked_or_queued
 334     else
 335       log_reuse_info { "have no containers in Locked or Queued state" }
 336     end
 337
 338     log_reuse_info { "done, no reusable container found" }
 339     nil
 340   end
 341
 342   def lock
 343     self.with_lock do
 344       if self.state != Queued
 345         raise LockFailedError.new("cannot lock when #{self.state}")
 346       end
 347       self.update_attributes!(state: Locked)
 348     end
 349   end
 350
 351   def check_lock
 352     if state_was == Queued and state == Locked
 353       if self.priority <= 0
 354         raise LockFailedError.new("cannot lock when priority<=0")
 355       end
 356       self.lock_count = self.lock_count+1
 357     end
 358   end
 359
 360   def unlock
 361     self.with_lock do
 362       if self.state != Locked
 363         raise InvalidStateTransitionError.new("cannot unlock when #{self.state}")
 364       end
 365       self.update_attributes!(state: Queued)
 366     end
 367   end
 368
 369   def check_unlock
 370     if state_was == Locked and state == Queued
 371       if self.locked_by_uuid != current_api_client_authorization.uuid
 372         raise ArvadosModel::PermissionDeniedError.new("locked by a different token")
 373       end
 374       if self.lock_count >= Rails.configuration.Containers.MaxDispatchAttempts
 375         self.state = Cancelled
 376         self.runtime_status = {error: "Failed to start container.  Cancelled after exceeding 'Containers.MaxDispatchAttempts' (lock_count=#{self.lock_count})"}
 377       end
 378     end
 379   end
 380
 381   def self.readable_by(*users_list)
 382     # Load optional keyword arguments, if they exist.
 383     if users_list.last.is_a? Hash
 384       kwargs = users_list.pop
 385     else
 386       kwargs = {}
 387     end
 388     if users_list.select { |u| u.is_admin }.any?
 389       return super
 390     end
 391     Container.where(ContainerRequest.readable_by(*users_list).where("containers.uuid = container_requests.container_uuid").arel.exists)
 392   end
 393
 394   def final?
 395     [Complete, Cancelled].include?(self.state)
 396   end
 397
 398   def self.for_current_token
 399     return if !current_api_client_authorization
 400     _, _, _, container_uuid = Thread.current[:token].split('/')
 401     if container_uuid.nil?
 402       Container.where(auth_uuid: current_api_client_authorization.uuid).first
 403     else
 404       Container.where('auth_uuid=? or (uuid=? and runtime_token=?)',
 405                       current_api_client_authorization.uuid,
 406                       container_uuid,
 407                       current_api_client_authorization.token).first
 408     end
 409   end
 410
 411   protected
 412
 413   def fill_field_defaults
 414     self.state ||= Queued
 415     self.environment ||= {}
 416     self.runtime_constraints ||= {}
 417     self.mounts ||= {}
 418     self.cwd ||= "."
 419     self.priority ||= 0
 420     self.scheduling_parameters ||= {}
 421   end
 422
 423   def permission_to_create
 424     current_user.andand.is_admin
 425   end
 426
 427   def permission_to_destroy
 428     current_user.andand.is_admin
 429   end
 430
 431   def ensure_owner_uuid_is_permitted
 432     # validate_change ensures owner_uuid can't be changed at all --
 433     # except during create, which requires admin privileges. Checking
 434     # permission here would be superfluous.
 435     true
 436   end
 437
 438   def set_timestamps
 439     if self.state_changed? and self.state == Running
 440       self.started_at ||= db_current_time
 441     end
 442
 443     if self.state_changed? and [Complete, Cancelled].include? self.state
 444       self.finished_at ||= db_current_time
 445     end
 446   end
 447
 448   # Check that well-known runtime status keys have desired data types
 449   def validate_runtime_status
 450     [
 451       'error', 'errorDetail', 'warning', 'warningDetail', 'activity'
 452     ].each do |k|
 453       if self.runtime_status.andand.include?(k) && !self.runtime_status[k].is_a?(String)
 454         errors.add(:runtime_status, "'#{k}' value must be a string")
 455       end
 456     end
 457   end
 458
 459   def validate_change
 460     permitted = [:state]
 461     progress_attrs = [:progress, :runtime_status, :log, :output]
 462     final_attrs = [:exit_code, :finished_at]
 463
 464     if self.new_record?
 465       permitted.push(:owner_uuid, :command, :container_image, :cwd,
 466                      :environment, :mounts, :output_path, :priority,
 467                      :runtime_constraints, :scheduling_parameters,
 468                      :secret_mounts, :runtime_token,
 469                      :runtime_user_uuid, :runtime_auth_scopes)
 470     end
 471
 472     case self.state
 473     when Locked
 474       permitted.push :priority, :runtime_status, :log, :lock_count
 475
 476     when Queued
 477       permitted.push :priority
 478
 479     when Running
 480       permitted.push :priority, *progress_attrs
 481       if self.state_changed?
 482         permitted.push :started_at, :gateway_address
 483       end
 484
 485     when Complete
 486       if self.state_was == Running
 487         permitted.push *final_attrs, *progress_attrs
 488       end
 489
 490     when Cancelled
 491       case self.state_was
 492       when Running
 493         permitted.push :finished_at, *progress_attrs
 494       when Queued, Locked
 495         permitted.push :finished_at, :log, :runtime_status
 496       end
 497
 498     else
 499       # The state_transitions check will add an error message for this
 500       return false
 501     end
 502
 503     if self.state_was == Running &&
 504        !current_api_client_authorization.nil? &&
 505        (current_api_client_authorization.uuid == self.auth_uuid ||
 506         current_api_client_authorization.token == self.runtime_token)
 507       # The contained process itself can write final attrs but can't
 508       # change priority or log.
 509       permitted.push *final_attrs
 510       permitted = permitted - [:log, :priority]
 511     elsif !current_user.andand.is_admin
 512       raise PermissionDeniedError
 513     elsif self.locked_by_uuid && self.locked_by_uuid != current_api_client_authorization.andand.uuid
 514       # When locked, progress fields cannot be updated by the wrong
 515       # dispatcher, even though it has admin privileges.
 516       permitted = permitted - progress_attrs
 517     end
 518     check_update_whitelist permitted
 519   end
 520
 521   def validate_lock
 522     if [Locked, Running].include? self.state
 523       # If the Container was already locked, locked_by_uuid must not
 524       # changes. Otherwise, the current auth gets the lock.
 525       need_lock = locked_by_uuid_was || current_api_client_authorization.andand.uuid
 526     else
 527       need_lock = nil
 528     end
 529
 530     # The caller can provide a new value for locked_by_uuid, but only
 531     # if it's exactly what we expect. This allows a caller to perform
 532     # an update like {"state":"Unlocked","locked_by_uuid":null}.
 533     if self.locked_by_uuid_changed?
 534       if self.locked_by_uuid != need_lock
 535         return errors.add :locked_by_uuid, "can only change to #{need_lock}"
 536       end
 537     end
 538     self.locked_by_uuid = need_lock
 539   end
 540
 541   def validate_output
 542     # Output must exist and be readable by the current user.  This is so
 543     # that a container cannot "claim" a collection that it doesn't otherwise
 544     # have access to just by setting the output field to the collection PDH.
 545     if output_changed?
 546       c = Collection.
 547             readable_by(current_user, {include_trash: true}).
 548             where(portable_data_hash: self.output).
 549             first
 550       if !c
 551         errors.add :output, "collection must exist and be readable by current user."
 552       end
 553     end
 554   end
 555
 556   def update_cr_logs
 557     # If self.final?, this update is superfluous: the final log/output
 558     # update will be done when handle_completed calls finalize! on
 559     # each requesting CR.
 560     return if self.final? || !saved_change_to_log?
 561     leave_modified_by_user_alone do
 562       ContainerRequest.where(container_uuid: self.uuid).each do |cr|
 563         cr.update_collections(container: self, collections: ['log'])
 564         cr.save!
 565       end
 566     end
 567   end
 568
 569   def assign_auth
 570     if self.auth_uuid_changed?
 571          return errors.add :auth_uuid, 'is readonly'
 572     end
 573     if not [Locked, Running].include? self.state
 574       # Don't need one. If auth already exists, expire it.
 575       #
 576       # We use db_transaction_time here (not db_current_time) to
 577       # ensure the token doesn't validate later in the same
 578       # transaction (e.g., in a test case) by satisfying expires_at >
 579       # transaction timestamp.
 580       self.auth.andand.update_attributes(expires_at: db_transaction_time)
 581       self.auth = nil
 582       return
 583     elsif self.auth
 584       # already have one
 585       return
 586     end
 587     if self.runtime_token.nil?
 588       if self.runtime_user_uuid.nil?
 589         # legacy behavior, we don't have a runtime_user_uuid so get
 590         # the user from the highest priority container request, needed
 591         # when performing an upgrade and there are queued containers,
 592         # and some tests.
 593         cr = ContainerRequest.
 594                where('container_uuid=? and priority>0', self.uuid).
 595                order('priority desc').
 596                first
 597         if !cr
 598           return errors.add :auth_uuid, "cannot be assigned because priority <= 0"
 599         end
 600         self.runtime_user_uuid = cr.modified_by_user_uuid
 601         self.runtime_auth_scopes = ["all"]
 602       end
 603
 604       # generate a new token
 605       self.auth = ApiClientAuthorization.
 606                     create!(user_id: User.find_by_uuid(self.runtime_user_uuid).id,
 607                             api_client_id: 0,
 608                             scopes: self.runtime_auth_scopes)
 609     end
 610   end
 611
 612   def sort_serialized_attrs
 613     if self.environment_changed?
 614       self.environment = self.class.deep_sort_hash(self.environment)
 615     end
 616     if self.mounts_changed?
 617       self.mounts = self.class.deep_sort_hash(self.mounts)
 618     end
 619     if self.runtime_constraints_changed?
 620       self.runtime_constraints = self.class.deep_sort_hash(self.runtime_constraints)
 621     end
 622     if self.scheduling_parameters_changed?
 623       self.scheduling_parameters = self.class.deep_sort_hash(self.scheduling_parameters)
 624     end
 625     if self.runtime_auth_scopes_changed?
 626       self.runtime_auth_scopes = self.runtime_auth_scopes.sort
 627     end
 628   end
 629
 630   def update_secret_mounts_md5
 631     if self.secret_mounts_changed?
 632       self.secret_mounts_md5 = Digest::MD5.hexdigest(
 633         SafeJSON.dump(self.class.deep_sort_hash(self.secret_mounts)))
 634     end
 635   end
 636
 637   def scrub_secrets
 638     # this runs after update_secret_mounts_md5, so the
 639     # secret_mounts_md5 will still reflect the secrets that are being
 640     # scrubbed here.
 641     if self.state_changed? && self.final?
 642       self.secret_mounts = {}
 643       self.runtime_token = nil
 644     end
 645   end
 646
 647   def clear_runtime_status_when_queued
 648     # Avoid leaking status messages between different dispatch attempts
 649     if self.state_was == Locked && self.state == Queued
 650       self.runtime_status = {}
 651     end
 652   end
 653
 654   def handle_completed
 655     # This container is finished so finalize any associated container requests
 656     # that are associated with this container.
 657     if saved_change_to_state? and self.final?
 658       # These get wiped out by with_lock (which reloads the record),
 659       # so record them now in case we need to schedule a retry.
 660       prev_secret_mounts = secret_mounts_before_last_save
 661       prev_runtime_token = runtime_token_before_last_save
 662
 663       # Need to take a lock on the container to ensure that any
 664       # concurrent container requests that might try to reuse this
 665       # container will block until the container completion
 666       # transaction finishes.  This ensure that concurrent container
 667       # requests that try to reuse this container are finalized (on
 668       # Complete) or don't reuse it (on Cancelled).
 669       self.with_lock do
 670         act_as_system_user do
 671           if self.state == Cancelled
 672             retryable_requests = ContainerRequest.where("container_uuid = ? and priority > 0 and state = 'Committed' and container_count < container_count_max", uuid)
 673           else
 674             retryable_requests = []
 675           end
 676
 677           if retryable_requests.any?
 678             c_attrs = {
 679               command: self.command,
 680               cwd: self.cwd,
 681               environment: self.environment,
 682               output_path: self.output_path,
 683               container_image: self.container_image,
 684               mounts: self.mounts,
 685               runtime_constraints: self.runtime_constraints,
 686               scheduling_parameters: self.scheduling_parameters,
 687               secret_mounts: prev_secret_mounts,
 688               runtime_token: prev_runtime_token,
 689               runtime_user_uuid: self.runtime_user_uuid,
 690               runtime_auth_scopes: self.runtime_auth_scopes
 691             }
 692             c = Container.create! c_attrs
 693             retryable_requests.each do |cr|
 694               cr.with_lock do
 695                 leave_modified_by_user_alone do
 696                   # Use row locking because this increments container_count
 697                   cr.container_uuid = c.uuid
 698                   cr.save!
 699                 end
 700               end
 701             end
 702           end
 703
 704           # Notify container requests associated with this container
 705           ContainerRequest.where(container_uuid: uuid,
 706                                  state: ContainerRequest::Committed).each do |cr|
 707             leave_modified_by_user_alone do
 708               cr.finalize!
 709             end
 710           end
 711
 712           # Cancel outstanding container requests made by this container.
 713           ContainerRequest.
 714             includes(:container).
 715             where(requesting_container_uuid: uuid,
 716                   state: ContainerRequest::Committed).each do |cr|
 717             leave_modified_by_user_alone do
 718               cr.update_attributes!(priority: 0)
 719               cr.container.reload
 720               if cr.container.state == Container::Queued || cr.container.state == Container::Locked
 721                 # If the child container hasn't started yet, finalize the
 722                 # child CR now instead of leaving it "on hold", i.e.,
 723                 # Queued with priority 0.  (OTOH, if the child is already
 724                 # running, leave it alone so it can get cancelled the
 725                 # usual way, get a copy of the log collection, etc.)
 726                 cr.update_attributes!(state: ContainerRequest::Final)
 727               end
 728             end
 729           end
 730         end
 731       end
 732     end
 733   end
 734 end