1 # Copyright (C) The Arvados Authors. All rights reserved.
3 # SPDX-License-Identifier: AGPL-3.0
5 require 'log_reuse_info'
6 require 'whitelist_update'
8 require 'update_priority'
10 class Container < ArvadosModel
11 include ArvadosModelUpdates
14 include CommonApiTemplate
15 include WhitelistUpdate
16 extend CurrentApiClient
20 serialize :environment, Hash
21 serialize :mounts, Hash
22 serialize :runtime_constraints, Hash
23 serialize :command, Array
24 serialize :scheduling_parameters, Hash
25 serialize :secret_mounts, Hash
26 serialize :runtime_status, Hash
28 before_validation :fill_field_defaults, :if => :new_record?
29 before_validation :set_timestamps
30 validates :command, :container_image, :output_path, :cwd, :priority, { presence: true }
31 validates :priority, numericality: { only_integer: true, greater_than_or_equal_to: 0 }
32 validate :validate_runtime_status
33 validate :validate_state_change
34 validate :validate_change
35 validate :validate_lock
36 validate :validate_output
37 after_validation :assign_auth
38 before_save :sort_serialized_attrs
39 before_save :update_secret_mounts_md5
40 before_save :scrub_secret_mounts
41 before_save :clear_runtime_status_when_queued
42 after_save :handle_completed
43 after_save :propagate_priority
44 after_commit { UpdatePriority.run_update_thread }
46 has_many :container_requests, :foreign_key => :container_uuid, :class_name => 'ContainerRequest', :primary_key => :uuid
47 belongs_to :auth, :class_name => 'ApiClientAuthorization', :foreign_key => :auth_uuid, :primary_key => :uuid
49 api_accessible :user, extend: :common do |t|
51 t.add :container_image
63 t.add :runtime_constraints
68 t.add :scheduling_parameters
71 # Supported states for a container
76 (Running = 'Running'),
77 (Complete = 'Complete'),
78 (Cancelled = 'Cancelled')
83 Queued => [Locked, Cancelled],
84 Locked => [Queued, Running, Cancelled],
85 Running => [Complete, Cancelled]
88 def self.limit_index_columns_read
92 def self.full_text_searchable_columns
93 super - ["secret_mounts", "secret_mounts_md5"]
96 def self.searchable_columns *args
97 super - ["secret_mounts_md5"]
100 def logged_attributes
101 super.except('secret_mounts')
104 def state_transitions
108 # Container priority is the highest "computed priority" of any
109 # matching request. The computed priority of a container-submitted
110 # request is the priority of the submitting container. The computed
111 # priority of a user-submitted request is a function of
112 # user-assigned priority and request creation time.
114 return if ![Queued, Locked, Running].include?(state)
115 p = ContainerRequest.
116 where('container_uuid=? and priority>0', uuid).
117 includes(:requesting_container).
120 if cr.requesting_container
121 cr.requesting_container.priority
123 (cr.priority << 50) - (cr.created_at.to_time.to_f * 1000).to_i
126 update_attributes!(priority: p)
129 def propagate_priority
130 return true unless priority_changed?
131 act_as_system_user do
132 # Update the priority of child container requests to match new
133 # priority of the parent container (ignoring requests with no
134 # container assigned, because their priority doesn't matter).
136 where(requesting_container_uuid: self.uuid,
137 state: ContainerRequest::Committed).
138 where('container_uuid is not null').
139 includes(:container).
141 map(&:update_priority!)
145 # Create a new container (or find an existing one) to satisfy the
146 # given container request.
147 def self.resolve(req)
149 command: req.command,
151 environment: req.environment,
152 output_path: req.output_path,
153 container_image: resolve_container_image(req.container_image),
154 mounts: resolve_mounts(req.mounts),
155 runtime_constraints: resolve_runtime_constraints(req.runtime_constraints),
156 scheduling_parameters: req.scheduling_parameters,
157 secret_mounts: req.secret_mounts,
159 act_as_system_user do
160 if req.use_existing && (reusable = find_reusable(c_attrs))
163 Container.create!(c_attrs)
168 # Return a runtime_constraints hash that complies with requested but
169 # is suitable for saving in a container record, i.e., has specific
170 # values instead of ranges.
172 # Doing this as a step separate from other resolutions, like "git
173 # revision range to commit hash", makes sense only when there is no
174 # opportunity to reuse an existing container (e.g., container reuse
175 # is not implemented yet, or we have already found that no existing
176 # containers are suitable).
177 def self.resolve_runtime_constraints(runtime_constraints)
181 Rails.configuration.container_default_keep_cache_ram,
183 defaults.merge(runtime_constraints).each do |k, v|
193 # Return a mounts hash suitable for a Container, i.e., with every
194 # readonly collection UUID resolved to a PDH.
195 def self.resolve_mounts(mounts)
197 mounts.each do |k, mount|
200 if mount['kind'] != 'collection'
203 if (uuid = mount.delete 'uuid')
205 readable_by(current_user).
207 select(:portable_data_hash).
210 raise ArvadosModel::UnresolvableContainerError.new "cannot mount collection #{uuid.inspect}: not found"
212 if mount['portable_data_hash'].nil?
213 # PDH not supplied by client
214 mount['portable_data_hash'] = c.portable_data_hash
215 elsif mount['portable_data_hash'] != c.portable_data_hash
216 # UUID and PDH supplied by client, but they don't agree
217 raise ArgumentError.new "cannot mount collection #{uuid.inspect}: current portable_data_hash #{c.portable_data_hash.inspect} does not match #{c['portable_data_hash'].inspect} in request"
224 # Return a container_image PDH suitable for a Container.
225 def self.resolve_container_image(container_image)
226 coll = Collection.for_latest_docker_image(container_image)
228 raise ArvadosModel::UnresolvableContainerError.new "docker image #{container_image.inspect} not found"
230 coll.portable_data_hash
233 def self.find_reusable(attrs)
234 log_reuse_info { "starting with #{Container.all.count} container records in database" }
235 candidates = Container.where_serialized(:command, attrs[:command], md5: true)
236 log_reuse_info(candidates) { "after filtering on command #{attrs[:command].inspect}" }
238 candidates = candidates.where('cwd = ?', attrs[:cwd])
239 log_reuse_info(candidates) { "after filtering on cwd #{attrs[:cwd].inspect}" }
241 candidates = candidates.where_serialized(:environment, attrs[:environment], md5: true)
242 log_reuse_info(candidates) { "after filtering on environment #{attrs[:environment].inspect}" }
244 candidates = candidates.where('output_path = ?', attrs[:output_path])
245 log_reuse_info(candidates) { "after filtering on output_path #{attrs[:output_path].inspect}" }
247 image = resolve_container_image(attrs[:container_image])
248 candidates = candidates.where('container_image = ?', image)
249 log_reuse_info(candidates) { "after filtering on container_image #{image.inspect} (resolved from #{attrs[:container_image].inspect})" }
251 candidates = candidates.where_serialized(:mounts, resolve_mounts(attrs[:mounts]), md5: true)
252 log_reuse_info(candidates) { "after filtering on mounts #{attrs[:mounts].inspect}" }
254 secret_mounts_md5 = Digest::MD5.hexdigest(SafeJSON.dump(self.deep_sort_hash(attrs[:secret_mounts])))
255 candidates = candidates.where('secret_mounts_md5 = ?', secret_mounts_md5)
256 log_reuse_info(candidates) { "after filtering on secret_mounts_md5 #{secret_mounts_md5.inspect}" }
258 candidates = candidates.where_serialized(:runtime_constraints, resolve_runtime_constraints(attrs[:runtime_constraints]), md5: true)
259 log_reuse_info(candidates) { "after filtering on runtime_constraints #{attrs[:runtime_constraints].inspect}" }
261 log_reuse_info { "checking for state=Complete with readable output and log..." }
263 select_readable_pdh = Collection.
264 readable_by(current_user).
265 select(:portable_data_hash).
268 usable = candidates.where(state: Complete, exit_code: 0)
269 log_reuse_info(usable) { "with state=Complete, exit_code=0" }
271 usable = usable.where("log IN (#{select_readable_pdh})")
272 log_reuse_info(usable) { "with readable log" }
274 usable = usable.where("output IN (#{select_readable_pdh})")
275 log_reuse_info(usable) { "with readable output" }
277 usable = usable.order('finished_at ASC').limit(1).first
279 log_reuse_info { "done, reusing container #{usable.uuid} with state=Complete" }
283 # Check for non-failing Running candidates and return the most likely to finish sooner.
284 log_reuse_info { "checking for state=Running..." }
285 running = candidates.where(state: Running).
286 where("(runtime_status->'error') is null").
287 order('progress desc, started_at asc').
290 log_reuse_info { "done, reusing container #{running.uuid} with state=Running" }
293 log_reuse_info { "have no containers in Running state" }
296 # Check for Locked or Queued ones and return the most likely to start first.
297 locked_or_queued = candidates.
298 where("state IN (?)", [Locked, Queued]).
299 order('state asc, priority desc, created_at asc').
302 log_reuse_info { "done, reusing container #{locked_or_queued.uuid} with state=#{locked_or_queued.state}" }
303 return locked_or_queued
305 log_reuse_info { "have no containers in Locked or Queued state" }
308 log_reuse_info { "done, no reusable container found" }
313 if self.state != Queued
314 raise LockFailedError.new("cannot lock when #{self.state}")
315 elsif self.priority <= 0
316 raise LockFailedError.new("cannot lock when priority<=0")
321 # Check invalid state transitions once before getting the lock
322 # (because it's cheaper that way) and once after getting the lock
323 # (because state might have changed while acquiring the lock).
328 update_attributes!(state: Locked)
332 def check_unlock_fail
333 if self.state != Locked
334 raise InvalidStateTransitionError.new("cannot unlock when #{self.state}")
335 elsif self.locked_by_uuid != current_api_client_authorization.uuid
336 raise InvalidStateTransitionError.new("locked by a different token")
341 # Check invalid state transitions twice (see lock)
344 reload(lock: 'FOR UPDATE')
346 update_attributes!(state: Queued)
350 def self.readable_by(*users_list)
351 # Load optional keyword arguments, if they exist.
352 if users_list.last.is_a? Hash
353 kwargs = users_list.pop
357 Container.where(ContainerRequest.readable_by(*users_list).where("containers.uuid = container_requests.container_uuid").exists)
361 [Complete, Cancelled].include?(self.state)
366 def fill_field_defaults
367 self.state ||= Queued
368 self.environment ||= {}
369 self.runtime_constraints ||= {}
373 self.scheduling_parameters ||= {}
376 def permission_to_create
377 current_user.andand.is_admin
380 def permission_to_update
381 # Override base permission check to allow auth_uuid to set progress and
382 # output (only). Whether it is legal to set progress and output in the current
383 # state has already been checked in validate_change.
384 current_user.andand.is_admin ||
385 (!current_api_client_authorization.nil? and
386 [self.auth_uuid, self.locked_by_uuid].include? current_api_client_authorization.uuid)
389 def ensure_owner_uuid_is_permitted
390 # Override base permission check to allow auth_uuid to set progress and
391 # output (only). Whether it is legal to set progress and output in the current
392 # state has already been checked in validate_change.
393 if !current_api_client_authorization.nil? and self.auth_uuid == current_api_client_authorization.uuid
394 check_update_whitelist [:progress, :output]
401 if self.state_changed? and self.state == Running
402 self.started_at ||= db_current_time
405 if self.state_changed? and [Complete, Cancelled].include? self.state
406 self.finished_at ||= db_current_time
410 # Check that well-known runtime status keys have desired data types
411 def validate_runtime_status
413 'error', 'errorDetail', 'warning', 'warningDetail', 'activity'
415 if self.runtime_status.andand.include?(k) && !self.runtime_status[k].is_a?(String)
416 errors.add(:runtime_status, "'#{k}' value must be a string")
425 permitted.push(:owner_uuid, :command, :container_image, :cwd,
426 :environment, :mounts, :output_path, :priority,
427 :runtime_constraints, :scheduling_parameters,
433 permitted.push :priority, :runtime_status
436 permitted.push :priority
439 permitted.push :priority, :progress, :output, :runtime_status
440 if self.state_changed?
441 permitted.push :started_at
445 if self.state_was == Running
446 permitted.push :finished_at, :output, :log, :exit_code
452 permitted.push :finished_at, :output, :log
454 permitted.push :finished_at, :log
458 # The state_transitions check will add an error message for this
462 check_update_whitelist permitted
466 if [Locked, Running].include? self.state
467 # If the Container was already locked, locked_by_uuid must not
468 # changes. Otherwise, the current auth gets the lock.
469 need_lock = locked_by_uuid_was || current_api_client_authorization.andand.uuid
474 # The caller can provide a new value for locked_by_uuid, but only
475 # if it's exactly what we expect. This allows a caller to perform
476 # an update like {"state":"Unlocked","locked_by_uuid":null}.
477 if self.locked_by_uuid_changed?
478 if self.locked_by_uuid != need_lock
479 return errors.add :locked_by_uuid, "can only change to #{need_lock}"
482 self.locked_by_uuid = need_lock
486 # Output must exist and be readable by the current user. This is so
487 # that a container cannot "claim" a collection that it doesn't otherwise
488 # have access to just by setting the output field to the collection PDH.
491 readable_by(current_user, {include_trash: true}).
492 where(portable_data_hash: self.output).
495 errors.add :output, "collection must exist and be readable by current user."
501 if self.auth_uuid_changed?
502 return errors.add :auth_uuid, 'is readonly'
504 if not [Locked, Running].include? self.state
506 self.auth.andand.update_attributes(expires_at: db_current_time)
513 cr = ContainerRequest.
514 where('container_uuid=? and priority>0', self.uuid).
515 order('priority desc').
518 return errors.add :auth_uuid, "cannot be assigned because priority <= 0"
520 self.auth = ApiClientAuthorization.
521 create!(user_id: User.find_by_uuid(cr.modified_by_user_uuid).id,
525 def sort_serialized_attrs
526 if self.environment_changed?
527 self.environment = self.class.deep_sort_hash(self.environment)
529 if self.mounts_changed?
530 self.mounts = self.class.deep_sort_hash(self.mounts)
532 if self.runtime_constraints_changed?
533 self.runtime_constraints = self.class.deep_sort_hash(self.runtime_constraints)
535 if self.scheduling_parameters_changed?
536 self.scheduling_parameters = self.class.deep_sort_hash(self.scheduling_parameters)
540 def update_secret_mounts_md5
541 if self.secret_mounts_changed?
542 self.secret_mounts_md5 = Digest::MD5.hexdigest(
543 SafeJSON.dump(self.class.deep_sort_hash(self.secret_mounts)))
547 def scrub_secret_mounts
548 # this runs after update_secret_mounts_md5, so the
549 # secret_mounts_md5 will still reflect the secrets that are being
551 if self.state_changed? && self.final?
552 self.secret_mounts = {}
556 def clear_runtime_status_when_queued
557 # Avoid leaking status messages between different dispatch attempts
558 if self.state_was == Locked && self.state == Queued
559 self.runtime_status = {}
564 # This container is finished so finalize any associated container requests
565 # that are associated with this container.
566 if self.state_changed? and self.final?
567 act_as_system_user do
569 if self.state == Cancelled
570 retryable_requests = ContainerRequest.where("container_uuid = ? and priority > 0 and state = 'Committed' and container_count < container_count_max", uuid)
572 retryable_requests = []
575 if retryable_requests.any?
577 command: self.command,
579 environment: self.environment,
580 output_path: self.output_path,
581 container_image: self.container_image,
583 runtime_constraints: self.runtime_constraints,
584 scheduling_parameters: self.scheduling_parameters
586 c = Container.create! c_attrs
587 retryable_requests.each do |cr|
589 leave_modified_by_user_alone do
590 # Use row locking because this increments container_count
591 cr.container_uuid = c.uuid
598 # Notify container requests associated with this container
599 ContainerRequest.where(container_uuid: uuid,
600 state: ContainerRequest::Committed).each do |cr|
601 leave_modified_by_user_alone do
606 # Cancel outstanding container requests made by this container.
608 includes(:container).
609 where(requesting_container_uuid: uuid,
610 state: ContainerRequest::Committed).each do |cr|
611 leave_modified_by_user_alone do
612 cr.update_attributes!(priority: 0)
614 if cr.container.state == Container::Queued || cr.container.state == Container::Locked
615 # If the child container hasn't started yet, finalize the
616 # child CR now instead of leaving it "on hold", i.e.,
617 # Queued with priority 0. (OTOH, if the child is already
618 # running, leave it alone so it can get cancelled the
619 # usual way, get a copy of the log collection, etc.)
620 cr.update_attributes!(state: ContainerRequest::Final)