buildgrid.server.scheduler package

Submodules

• buildgrid.server.scheduler.assigner module
  • JobAssigner
    • JobAssigner.start()
    • JobAssigner.stop()
    • JobAssigner.listener_count()
    • JobAssigner.assignment_context()
    • JobAssigner.assign_jobs()
    • JobAssigner.begin()
• buildgrid.server.scheduler.impl module
  • SchedulerMetrics
    • SchedulerMetrics.jobs
  • AgedJobHandlerOptions
    • AgedJobHandlerOptions.job_max_age
    • AgedJobHandlerOptions.handling_period
    • AgedJobHandlerOptions.max_handling_window
    • AgedJobHandlerOptions.from_config()
  • Scheduler
    • Scheduler.RETRYABLE_STATUS_CODES
    • Scheduler.start()
    • Scheduler.stop()
    • Scheduler.queue_job_action()
    • Scheduler.create_operation_for_existing_job()
    • Scheduler.create_operation_for_new_job()
    • Scheduler.create_operation()
    • Scheduler.load_operation()
    • Scheduler.get_operation_job_name()
    • Scheduler.get_operation_request_metadata_by_name()
    • Scheduler.get_client_identity_by_operation()
    • Scheduler.execution_timer_loop()
    • Scheduler.cancel_jobs_exceeding_execution_timeout()
    • Scheduler.cancel_operation()
    • Scheduler.list_operations()
    • Scheduler.list_workers()
    • Scheduler.get_metrics()
    • Scheduler.assign_n_leases_by_priority()
    • Scheduler.assign_n_leases_by_age()
    • Scheduler.queue_timer_loop()
    • Scheduler.prune_timer_loop()
    • Scheduler.get_or_create_client_identity_in_store()
    • Scheduler.get_or_create_request_metadata_in_store()
    • Scheduler.add_bot_entry()
    • Scheduler.close_bot_sessions()
    • Scheduler.session_expiry_timer_loop()
    • Scheduler.reap_expired_sessions()
    • Scheduler.synchronize_bot_lease()
    • Scheduler.count_bots_by_status()
    • Scheduler.refresh_bot_expiry_time()
    • Scheduler.get_metadata_for_leases()
    • Scheduler.get_execute_action_metadata()
    • Scheduler.publish_execution_stats()
• buildgrid.server.scheduler.notifier module
  • OperationsNotifier
    • OperationsNotifier.start()
    • OperationsNotifier.stop()
    • OperationsNotifier.listener_count()
    • OperationsNotifier.begin()
    • OperationsNotifier.notify()
    • OperationsNotifier.subscription()
• buildgrid.server.scheduler.properties module
  • hash_from_dict()
  • PropertySet
    • PropertySet.execution_properties()
    • PropertySet.worker_properties()
  • DynamicPropertySet
    • DynamicPropertySet.execution_properties()
    • DynamicPropertySet.worker_properties()
  • PropertyLabel
    • PropertyLabel.label
    • PropertyLabel.properties
  • StaticPropertySet
    • StaticPropertySet.execution_properties()
    • StaticPropertySet.worker_properties()
  • bot_properties()
  • partial_bot_properties()
  • flatten_properties()
  • merge_property_pairs()

Module contents

class buildgrid.server.scheduler.AgedJobHandlerOptions(job_max_age, handling_period, max_handling_window)

Bases: NamedTuple

job_max_age: timedelta

Alias for field number 0

handling_period: timedelta

Alias for field number 1

max_handling_window: int

Alias for field number 2

static from_config(job_max_age_cfg: Dict[str, float], handling_period_cfg: Dict[str, float] | None = None, max_handling_window_cfg: int | None = None) → AgedJobHandlerOptions

Helper method for creating AgedJobHandlerOptions objects If input configs are None, assign defaults

class buildgrid.server.scheduler.Scheduler(sql_provider: SqlProvider, storage: StorageABC, *, sql_ro_provider: SqlProvider | None = None, sql_notifier_provider: SqlProvider | None = None, property_set: PropertySet, action_cache: ActionCacheABC | None = None, action_browser_url: str | None = None, max_execution_timeout: int = 7200, metering_client: SyncMeteringServiceClient | None = None, metering_throttle_action: MeteringThrottleAction | None = None, bot_session_keepalive_timeout: int = 600, logstream_channel: Channel | None = None, logstream_instance: str | None = None, asset_client: AssetClient | None = None, queued_action_retention_hours: float | None = None, completed_action_retention_hours: float | None = None, action_result_retention_hours: float | None = None, enable_job_watcher: bool = False, poll_interval: float = 1, pruning_options: AgedJobHandlerOptions | None = None, queue_timeout_options: AgedJobHandlerOptions | None = None, max_job_attempts: int = 5, job_assignment_interval: float = 1.0, priority_assignment_percentage: int = 100, max_queue_size: int | None = None)

Bases: object

RETRYABLE_STATUS_CODES = (13, 14)

start(*, start_job_watcher: bool = True) → None

stop() → None

queue_job_action(*, action: Action, action_digest: Digest, command: Command, platform_requirements: Dict[str, List[str]], property_label: str, priority: int, skip_cache_lookup: bool, request_metadata: RequestMetadata | None = None, client_identity: ClientIdentityEntry | None = None) → str

De-duplicates or inserts a newly created job into the execution queue. Returns an operation name associated with this job.

create_operation_for_existing_job(*, action_digest: Digest, priority: int, request_metadata: RequestMetadata | None, client_identity: ClientIdentityEntry | None) → str | None

create_operation_for_new_job(*, action: Action, action_digest: Digest, command: Command, execute_response: ExecuteResponse | None, platform_requirements: Dict[str, List[str]], property_label: str, priority: int, request_metadata: RequestMetadata | None = None, client_identity: ClientIdentityEntry | None = None) → str

create_operation(job_name: str, *, request_metadata: RequestMetadata | None = None, client_identity: ClientIdentityEntry | None = None) → str

load_operation(operation_name: str) → Operation

get_operation_job_name(operation_name: str) → str | None

get_operation_request_metadata_by_name(operation_name: str) → RequestMetadata | None

get_client_identity_by_operation(operation_name: str) → ClientIdentity | None

execution_timer_loop(shutdown_requested: Event) → None

Periodically timeout aged executing jobs

cancel_jobs_exceeding_execution_timeout(max_execution_timeout: int | None = None) → None

cancel_operation(operation_name: str) → None

list_operations(operation_filters: List[OperationFilter] | None = None, page_size: int | None = None, page_token: str | None = None) → Tuple[List[Operation], str]

list_workers(name_filter: str, page_number: int, page_size: int) → Tuple[List[BotEntry], int]

get_metrics() → SchedulerMetrics | None

assign_n_leases_by_priority(*, capability_hash: str, bot_names: List[str]) → List[str]

assign_n_leases_by_age(*, capability_hash: str, bot_names: List[str]) → List[str]

queue_timer_loop(shutdown_requested: Event) → None

Periodically timeout aged queued jobs

prune_timer_loop(shutdown_requested: Event) → None

Running in a background thread, this method wakes up periodically and deletes older records from the jobs tables using configurable parameters

get_or_create_client_identity_in_store(session: Session, client_id: ClientIdentityEntry) → ClientIdentityEntry

Get the ClientIdentity in the storage or create one. This helper function essentially makes sure the client_id is created during the transaction

Parameters:

• session (Session) – sqlalchemy Session

• client_id (ClientIdentityEntry) – identity of the client that creates an operation

Returns:

identity of the client that creates an operation

Return type:

ClientIdentityEntry

get_or_create_request_metadata_in_store(session: Session, request_metadata: RequestMetadata) → RequestMetadataEntry

add_bot_entry(*, bot_session_id: str, bot_session_status: int) → str

close_bot_sessions(bot_name: str) → None

session_expiry_timer_loop(shutdown_requested: Event) → None

reap_expired_sessions() → bool

Find and close expired bot sessions. Returns True if sessions were closed. Only closes a few sessions to minimize time in transaction.

synchronize_bot_lease(bot_name: str, bot_id: str, bot_status: int, session_lease: Lease | None, partial_execution_metadata: Dict[str, ExecutedActionMetadata] | None = None) → Lease | None

count_bots_by_status() → Dict[BotStatus, int]

Count the number of bots with a particular status

refresh_bot_expiry_time(bot_name: str, bot_id: str) → datetime

This update is done out-of-band from the main synchronize_bot_lease transaction, as there are cases where we will skip calling the synchronization, but still want the session to be updated such that it does not get reaped. This slightly duplicates the update happening in synchronize_bot_lease, however, that update is still required to not have the job reaped during its job assignment waiting period.

This method should be called at the end of the update and create bot session methods. The returned datetime should be assigned to the deadline within the returned session proto.

get_metadata_for_leases(leases: Iterable[Lease]) → List[Tuple[str, bytes]]

Return a list of Job metadata for a given list of leases.

Parameters:

leases (list) – List of leases to get Job metadata for.

Returns:

List of tuples of the form ('executeoperationmetadata-bin': serialized_metadata).

get_execute_action_metadata(job: JobEntry) → ExecutedActionMetadata

publish_execution_stats(job_name: str, execution_metadata: ExecutedActionMetadata) → None

class buildgrid.server.scheduler.SchedulerMetrics

Bases: TypedDict

jobs: Dict[int, int]

class buildgrid.server.scheduler.PropertySet(*args, **kwargs)

Bases: Protocol

execution_properties(platform: Platform) → Tuple[str, Dict[str, List[str]]]

Parses a platform value and returns the match properties used for scheduling. Returns a label which can be used for applying metrics.

worker_properties(bot_session: BotSession) → List[Dict[str, List[str]]]

Find all the valid property combinations which can be used to assign work to a bot.

class buildgrid.server.scheduler.DynamicPropertySet(*, unique_property_keys: Set[str], match_property_keys: Set[str], wildcard_property_keys: Set[str], label_key: str | None = None)

Bases: object

execution_properties(platform: Platform) → Tuple[str, Dict[str, List[str]]]

worker_properties(bot_session: BotSession) → List[Dict[str, List[str]]]

class buildgrid.server.scheduler.StaticPropertySet(*, property_labels: List[PropertyLabel], wildcard_property_keys: Set[str])

Bases: object

execution_properties(platform: Platform) → Tuple[str, Dict[str, List[str]]]

worker_properties(bot_session: BotSession) → List[Dict[str, List[str]]]

class buildgrid.server.scheduler.PropertyLabel(label: str, properties: Set[Tuple[str, str]])

Bases: object

label: str

properties: Set[Tuple[str, str]]