require 'whitelist_update'
+require 'safe_json'
class Container < ArvadosModel
include HasUuid
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,
+ }
+ 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)
candidates = Container.
- where('command = ?', attrs[:command].to_yaml).
+ where_serialized(:command, attrs[:command]).
where('cwd = ?', attrs[:cwd]).
- where('environment = ?', self.deep_sort_hash(attrs[:environment]).to_yaml).
+ where_serialized(:environment, attrs[:environment]).
where('output_path = ?', attrs[:output_path]).
- where('container_image = ?', attrs[:container_image]).
- where('mounts = ?', self.deep_sort_hash(attrs[:mounts]).to_yaml).
- where('runtime_constraints = ?', self.deep_sort_hash(attrs[:runtime_constraints]).to_yaml)
+ where('container_image = ?', resolve_container_image(attrs[:container_image])).
+ where_serialized(:mounts, resolve_mounts(attrs[:mounts])).
+ where_serialized(:runtime_constraints, resolve_runtime_constraints(attrs[:runtime_constraints]))
# Check for Completed candidates whose output and log are both readable.
select_readable_pdh = Collection.
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