+# Copyright (C) The Arvados Authors. All rights reserved.
+#
+# SPDX-License-Identifier: AGPL-3.0
+
+require 'log_reuse_info'
require 'whitelist_update'
+require 'safe_json'
class Container < ArvadosModel
include HasUuid
include KindAndEtag
include CommonApiTemplate
include WhitelistUpdate
+ extend CurrentApiClient
+ extend DbCurrentTime
+ extend LogReuseInfo
serialize :environment, Hash
serialize :mounts, Hash
serialize :runtime_constraints, Hash
serialize :command, Array
+ serialize :scheduling_parameters, Hash
+ serialize :secret_mounts, Hash
before_validation :fill_field_defaults, :if => :new_record?
before_validation :set_timestamps
- validates :command, :container_image, :output_path, :cwd, :priority, :presence => true
+ validates :command, :container_image, :output_path, :cwd, :priority, { presence: true }
+ validates :priority, numericality: { only_integer: true, greater_than_or_equal_to: 0 }
validate :validate_state_change
validate :validate_change
+ validate :validate_lock
+ validate :validate_output
+ after_validation :assign_auth
+ before_save :sort_serialized_attrs
+ before_save :update_secret_mounts_md5
+ before_save :scrub_secret_mounts
after_save :handle_completed
+ after_save :propagate_priority
has_many :container_requests, :foreign_key => :container_uuid, :class_name => 'ContainerRequest', :primary_key => :uuid
+ belongs_to :auth, :class_name => 'ApiClientAuthorization', :foreign_key => :auth_uuid, :primary_key => :uuid
api_accessible :user, extend: :common do |t|
t.add :command
t.add :container_image
t.add :cwd
t.add :environment
+ t.add :exit_code
t.add :finished_at
+ t.add :locked_by_uuid
t.add :log
t.add :mounts
t.add :output
t.add :runtime_constraints
t.add :started_at
t.add :state
+ t.add :auth_uuid
+ t.add :scheduling_parameters
end
# Supported states for a container
States =
[
(Queued = 'Queued'),
+ (Locked = 'Locked'),
(Running = 'Running'),
(Complete = 'Complete'),
(Cancelled = 'Cancelled')
State_transitions = {
nil => [Queued],
- Queued => [Running, Cancelled],
+ Queued => [Locked, Cancelled],
+ Locked => [Queued, Running, Cancelled],
Running => [Complete, Cancelled]
}
+ def self.limit_index_columns_read
+ ["mounts"]
+ end
+
+ def self.full_text_searchable_columns
+ super - ["secret_mounts", "secret_mounts_md5"]
+ end
+
+ def self.searchable_columns *args
+ super - ["secret_mounts_md5"]
+ end
+
+ def logged_attributes
+ super.except('secret_mounts')
+ end
+
def state_transitions
State_transitions
end
+ # Container priority is the highest "computed priority" of any
+ # matching request. The computed priority of a container-submitted
+ # request is the priority of the submitting container. The computed
+ # priority of a user-submitted request is a function of
+ # user-assigned priority and request creation time.
def update_priority!
- if [Queued, Running].include? self.state
- # Update the priority of this container to the maximum priority of any of
- # its committed container requests and save the record.
- max = 0
- ContainerRequest.where(container_uuid: uuid).each do |cr|
- if cr.state == ContainerRequest::Committed and cr.priority > max
- max = cr.priority
+ return if ![Queued, Locked, Running].include?(state)
+ p = ContainerRequest.
+ where('container_uuid=? and priority>0', uuid).
+ includes(:requesting_container).
+ lock(true).
+ map do |cr|
+ if cr.requesting_container
+ cr.requesting_container.priority
+ else
+ (cr.priority << 50) - (cr.created_at.to_time.to_f * 1000).to_i
+ end
+ end.max || 0
+ update_attributes!(priority: p)
+ end
+
+ def propagate_priority
+ return true unless priority_changed?
+ act_as_system_user do
+ # Update the priority of child container requests to match new
+ # priority of the parent container (ignoring requests with no
+ # container assigned, because their priority doesn't matter).
+ ContainerRequest.
+ where(requesting_container_uuid: self.uuid,
+ state: ContainerRequest::Committed).
+ where('container_uuid is not null').
+ includes(:container).
+ map(&:container).
+ map(&:update_priority!)
+ end
+ end
+
+ # Create a new container (or find an existing one) to satisfy the
+ # given container request.
+ def self.resolve(req)
+ c_attrs = {
+ command: req.command,
+ cwd: req.cwd,
+ environment: req.environment,
+ output_path: req.output_path,
+ container_image: resolve_container_image(req.container_image),
+ mounts: resolve_mounts(req.mounts),
+ runtime_constraints: resolve_runtime_constraints(req.runtime_constraints),
+ scheduling_parameters: req.scheduling_parameters,
+ secret_mounts: req.secret_mounts,
+ }
+ act_as_system_user do
+ if req.use_existing && (reusable = find_reusable(c_attrs))
+ reusable
+ else
+ Container.create!(c_attrs)
+ end
+ end
+ end
+
+ # Return a runtime_constraints hash that complies with requested but
+ # is suitable for saving in a container record, i.e., has specific
+ # values instead of ranges.
+ #
+ # Doing this as a step separate from other resolutions, like "git
+ # revision range to commit hash", makes sense only when there is no
+ # opportunity to reuse an existing container (e.g., container reuse
+ # is not implemented yet, or we have already found that no existing
+ # containers are suitable).
+ def self.resolve_runtime_constraints(runtime_constraints)
+ rc = {}
+ defaults = {
+ 'keep_cache_ram' =>
+ Rails.configuration.container_default_keep_cache_ram,
+ }
+ defaults.merge(runtime_constraints).each do |k, v|
+ if v.is_a? Array
+ rc[k] = v[0]
+ else
+ rc[k] = v
+ end
+ end
+ rc
+ end
+
+ # Return a mounts hash suitable for a Container, i.e., with every
+ # readonly collection UUID resolved to a PDH.
+ def self.resolve_mounts(mounts)
+ c_mounts = {}
+ mounts.each do |k, mount|
+ mount = mount.dup
+ c_mounts[k] = mount
+ if mount['kind'] != 'collection'
+ next
+ end
+ if (uuid = mount.delete 'uuid')
+ c = Collection.
+ readable_by(current_user).
+ where(uuid: uuid).
+ select(:portable_data_hash).
+ first
+ if !c
+ raise ArvadosModel::UnresolvableContainerError.new "cannot mount collection #{uuid.inspect}: not found"
end
+ if mount['portable_data_hash'].nil?
+ # PDH not supplied by client
+ mount['portable_data_hash'] = c.portable_data_hash
+ elsif mount['portable_data_hash'] != c.portable_data_hash
+ # UUID and PDH supplied by client, but they don't agree
+ 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"
+ end
+ end
+ end
+ return c_mounts
+ end
+
+ # Return a container_image PDH suitable for a Container.
+ def self.resolve_container_image(container_image)
+ coll = Collection.for_latest_docker_image(container_image)
+ if !coll
+ raise ArvadosModel::UnresolvableContainerError.new "docker image #{container_image.inspect} not found"
+ end
+ coll.portable_data_hash
+ end
+
+ def self.find_reusable(attrs)
+ log_reuse_info { "starting with #{Container.all.count} container records in database" }
+ candidates = Container.where_serialized(:command, attrs[:command])
+ log_reuse_info(candidates) { "after filtering on command #{attrs[:command].inspect}" }
+
+ candidates = candidates.where('cwd = ?', attrs[:cwd])
+ log_reuse_info(candidates) { "after filtering on cwd #{attrs[:cwd].inspect}" }
+
+ candidates = candidates.where_serialized(:environment, attrs[:environment])
+ log_reuse_info(candidates) { "after filtering on environment #{attrs[:environment].inspect}" }
+
+ candidates = candidates.where('output_path = ?', attrs[:output_path])
+ log_reuse_info(candidates) { "after filtering on output_path #{attrs[:output_path].inspect}" }
+
+ image = resolve_container_image(attrs[:container_image])
+ candidates = candidates.where('container_image = ?', image)
+ log_reuse_info(candidates) { "after filtering on container_image #{image.inspect} (resolved from #{attrs[:container_image].inspect})" }
+
+ candidates = candidates.where_serialized(:mounts, resolve_mounts(attrs[:mounts]))
+ log_reuse_info(candidates) { "after filtering on mounts #{attrs[:mounts].inspect}" }
+
+ candidates = candidates.where('secret_mounts_md5 = ?', Digest::MD5.hexdigest(SafeJSON.dump(self.deep_sort_hash(attrs[:secret_mounts]))))
+ log_reuse_info(candidates) { "after filtering on mounts #{attrs[:mounts].inspect}" }
+
+ candidates = candidates.where_serialized(:runtime_constraints, resolve_runtime_constraints(attrs[:runtime_constraints]))
+ log_reuse_info(candidates) { "after filtering on runtime_constraints #{attrs[:runtime_constraints].inspect}" }
+
+ log_reuse_info { "checking for state=Complete with readable output and log..." }
+
+ select_readable_pdh = Collection.
+ readable_by(current_user).
+ select(:portable_data_hash).
+ to_sql
+
+ usable = candidates.where(state: Complete, exit_code: 0)
+ log_reuse_info(usable) { "with state=Complete, exit_code=0" }
+
+ usable = usable.where("log IN (#{select_readable_pdh})")
+ log_reuse_info(usable) { "with readable log" }
+
+ usable = usable.where("output IN (#{select_readable_pdh})")
+ log_reuse_info(usable) { "with readable output" }
+
+ usable = usable.order('finished_at ASC').limit(1).first
+ if usable
+ log_reuse_info { "done, reusing container #{usable.uuid} with state=Complete" }
+ return usable
+ end
+
+ # Check for Running candidates and return the most likely to finish sooner.
+ log_reuse_info { "checking for state=Running..." }
+ running = candidates.where(state: Running).
+ order('progress desc, started_at asc').
+ limit(1).first
+ if running
+ log_reuse_info { "done, reusing container #{running.uuid} with state=Running" }
+ return running
+ else
+ log_reuse_info { "have no containers in Running state" }
+ end
+
+ # Check for Locked or Queued ones and return the most likely to start first.
+ locked_or_queued = candidates.
+ where("state IN (?)", [Locked, Queued]).
+ order('state asc, priority desc, created_at asc').
+ limit(1).first
+ if locked_or_queued
+ log_reuse_info { "done, reusing container #{locked_or_queued.uuid} with state=#{locked_or_queued.state}" }
+ return locked_or_queued
+ else
+ log_reuse_info { "have no containers in Locked or Queued state" }
+ end
+
+ log_reuse_info { "done, no reusable container found" }
+ nil
+ end
+
+ def check_lock_fail
+ if self.state != Queued
+ raise LockFailedError.new("cannot lock when #{self.state}")
+ elsif self.priority <= 0
+ raise LockFailedError.new("cannot lock when priority<=0")
+ end
+ end
+
+ def lock
+ # Check invalid state transitions once before getting the lock
+ # (because it's cheaper that way) and once after getting the lock
+ # (because state might have changed while acquiring the lock).
+ check_lock_fail
+ transaction do
+ begin
+ reload(lock: 'FOR UPDATE NOWAIT')
+ rescue
+ raise LockFailedError.new("cannot lock: other transaction in progress")
end
- self.priority = max
- self.save!
+ check_lock_fail
+ update_attributes!(state: Locked)
+ end
+ end
+
+ def check_unlock_fail
+ if self.state != Locked
+ raise InvalidStateTransitionError.new("cannot unlock when #{self.state}")
+ elsif self.locked_by_uuid != current_api_client_authorization.uuid
+ raise InvalidStateTransitionError.new("locked by a different token")
+ end
+ end
+
+ def unlock
+ # Check invalid state transitions twice (see lock)
+ check_unlock_fail
+ transaction do
+ reload(lock: 'FOR UPDATE')
+ check_unlock_fail
+ update_attributes!(state: Queued)
end
end
+ def self.readable_by(*users_list)
+ # Load optional keyword arguments, if they exist.
+ if users_list.last.is_a? Hash
+ kwargs = users_list.pop
+ else
+ kwargs = {}
+ end
+ Container.where(ContainerRequest.readable_by(*users_list).where("containers.uuid = container_requests.container_uuid").exists)
+ end
+
+ def final?
+ [Complete, Cancelled].include?(self.state)
+ end
+
protected
def fill_field_defaults
self.runtime_constraints ||= {}
self.mounts ||= {}
self.cwd ||= "."
- self.priority ||= 1
+ self.priority ||= 0
+ self.scheduling_parameters ||= {}
end
def permission_to_create
end
def permission_to_update
- current_user.andand.is_admin
+ # Override base permission check to allow auth_uuid to set progress and
+ # output (only). Whether it is legal to set progress and output in the current
+ # state has already been checked in validate_change.
+ current_user.andand.is_admin ||
+ (!current_api_client_authorization.nil? and
+ [self.auth_uuid, self.locked_by_uuid].include? current_api_client_authorization.uuid)
+ end
+
+ def ensure_owner_uuid_is_permitted
+ # Override base permission check to allow auth_uuid to set progress and
+ # output (only). Whether it is legal to set progress and output in the current
+ # state has already been checked in validate_change.
+ if !current_api_client_authorization.nil? and self.auth_uuid == current_api_client_authorization.uuid
+ check_update_whitelist [:progress, :output]
+ else
+ super
+ end
end
def set_timestamps
end
def validate_change
- permitted = []
+ permitted = [:state]
if self.new_record?
- permitted.push :owner_uuid, :command, :container_image, :cwd, :environment,
- :mounts, :output_path, :priority, :runtime_constraints, :state
+ permitted.push(:owner_uuid, :command, :container_image, :cwd,
+ :environment, :mounts, :output_path, :priority,
+ :runtime_constraints, :scheduling_parameters,
+ :secret_mounts)
end
case self.state
- when Queued
- # permit priority change only.
+ when Queued, Locked
permitted.push :priority
when Running
+ permitted.push :priority, :progress, :output
if self.state_changed?
- # At point of state change, can set state and started_at
- permitted.push :state, :started_at
- else
- # While running, can update priority and progress.
- permitted.push :priority, :progress
+ permitted.push :started_at
end
when Complete
- if self.state_changed?
- permitted.push :state, :finished_at, :output, :log
- else
- errors.add :state, "cannot update record"
+ if self.state_was == Running
+ permitted.push :finished_at, :output, :log, :exit_code
end
when Cancelled
- if self.state_changed?
- if self.state_was == Running
- permitted.push :state, :finished_at, :output, :log
- elsif self.state_was == Queued
- permitted.push :state, :finished_at
- end
- else
- errors.add :state, "cannot update record"
+ case self.state_was
+ when Running
+ permitted.push :finished_at, :output, :log
+ when Queued, Locked
+ permitted.push :finished_at, :log
end
else
- errors.add :state, "invalid state"
+ # The state_transitions check will add an error message for this
+ return false
end
check_update_whitelist permitted
end
+ def validate_lock
+ if [Locked, Running].include? self.state
+ # If the Container was already locked, locked_by_uuid must not
+ # changes. Otherwise, the current auth gets the lock.
+ need_lock = locked_by_uuid_was || current_api_client_authorization.andand.uuid
+ else
+ need_lock = nil
+ end
+
+ # The caller can provide a new value for locked_by_uuid, but only
+ # if it's exactly what we expect. This allows a caller to perform
+ # an update like {"state":"Unlocked","locked_by_uuid":null}.
+ if self.locked_by_uuid_changed?
+ if self.locked_by_uuid != need_lock
+ return errors.add :locked_by_uuid, "can only change to #{need_lock}"
+ end
+ end
+ self.locked_by_uuid = need_lock
+ end
+
+ def validate_output
+ # Output must exist and be readable by the current user. This is so
+ # that a container cannot "claim" a collection that it doesn't otherwise
+ # have access to just by setting the output field to the collection PDH.
+ if output_changed?
+ c = Collection.
+ readable_by(current_user, {include_trash: true}).
+ where(portable_data_hash: self.output).
+ first
+ if !c
+ errors.add :output, "collection must exist and be readable by current user."
+ end
+ end
+ end
+
+ def assign_auth
+ if self.auth_uuid_changed?
+ return errors.add :auth_uuid, 'is readonly'
+ end
+ if not [Locked, Running].include? self.state
+ # don't need one
+ self.auth.andand.update_attributes(expires_at: db_current_time)
+ self.auth = nil
+ return
+ elsif self.auth
+ # already have one
+ return
+ end
+ cr = ContainerRequest.
+ where('container_uuid=? and priority>0', self.uuid).
+ order('priority desc').
+ first
+ if !cr
+ return errors.add :auth_uuid, "cannot be assigned because priority <= 0"
+ end
+ self.auth = ApiClientAuthorization.
+ create!(user_id: User.find_by_uuid(cr.modified_by_user_uuid).id,
+ api_client_id: 0)
+ end
+
+ def sort_serialized_attrs
+ if self.environment_changed?
+ self.environment = self.class.deep_sort_hash(self.environment)
+ end
+ if self.mounts_changed?
+ self.mounts = self.class.deep_sort_hash(self.mounts)
+ end
+ if self.runtime_constraints_changed?
+ self.runtime_constraints = self.class.deep_sort_hash(self.runtime_constraints)
+ end
+ if self.scheduling_parameters_changed?
+ self.scheduling_parameters = self.class.deep_sort_hash(self.scheduling_parameters)
+ end
+ end
+
+ def update_secret_mounts_md5
+ if self.secret_mounts_changed?
+ self.secret_mounts_md5 = Digest::MD5.hexdigest(
+ SafeJSON.dump(self.class.deep_sort_hash(self.secret_mounts)))
+ end
+ end
+
+ def scrub_secret_mounts
+ # this runs after update_secret_mounts_md5, so the
+ # secret_mounts_md5 will still reflect the secrets that are being
+ # scrubbed here.
+ if self.state_changed? && self.final?
+ self.secret_mounts = {}
+ end
+ end
+
def handle_completed
# This container is finished so finalize any associated container requests
# that are associated with this container.
- if self.state_changed? and [Complete, Cancelled].include? self.state
+ if self.state_changed? and self.final?
act_as_system_user do
+
+ if self.state == Cancelled
+ retryable_requests = ContainerRequest.where("container_uuid = ? and priority > 0 and state = 'Committed' and container_count < container_count_max", uuid)
+ else
+ retryable_requests = []
+ end
+
+ if retryable_requests.any?
+ c_attrs = {
+ command: self.command,
+ cwd: self.cwd,
+ environment: self.environment,
+ output_path: self.output_path,
+ container_image: self.container_image,
+ mounts: self.mounts,
+ runtime_constraints: self.runtime_constraints,
+ scheduling_parameters: self.scheduling_parameters
+ }
+ c = Container.create! c_attrs
+ retryable_requests.each do |cr|
+ cr.with_lock do
+ # Use row locking because this increments container_count
+ cr.container_uuid = c.uuid
+ cr.save!
+ end
+ end
+ end
+
# Notify container requests associated with this container
ContainerRequest.where(container_uuid: uuid,
- :state => ContainerRequest::Committed).each do |cr|
- cr.container_completed!
+ state: ContainerRequest::Committed).each do |cr|
+ cr.finalize!
end
- # Try to cancel any outstanding container requests made by this container.
- ContainerRequest.where(requesting_container_uuid: uuid,
- :state => ContainerRequest::Committed).each do |cr|
- cr.priority = 0
- cr.save
+ # Cancel outstanding container requests made by this container.
+ ContainerRequest.
+ includes(:container).
+ where(requesting_container_uuid: uuid,
+ state: ContainerRequest::Committed).each do |cr|
+ cr.update_attributes!(priority: 0)
+ cr.container.reload
+ if cr.container.state == Container::Queued || cr.container.state == Container::Locked
+ # If the child container hasn't started yet, finalize the
+ # child CR now instead of leaving it "on hold", i.e.,
+ # Queued with priority 0. (OTOH, if the child is already
+ # running, leave it alone so it can get cancelled the
+ # usual way, get a copy of the log collection, etc.)
+ cr.update_attributes!(state: ContainerRequest::Final)
+ end
end
end
end
projects / arvados.git / blobdiff