API reference

BuildGrid’s Application Programming Interface (API) reference documentation.

Configuration Parser API

The tagged YAML nodes in the reference configuration are handled by the YAML parser using the following set of objects:

class buildgrid._app.settings.parser.YamlFactory

Bases: YAMLObject

Base class for contructing maps or scalars from tags.

yaml_tag: str | None = None
schema: str | None = None
classmethod from_yaml(loader, node)

Convert a representation node to a Python object.

class buildgrid._app.settings.parser.Channel(_yaml_filename: str, insecure_mode: bool, address: str | None = None, port: int | None = None, credentials=None)

Bases: YamlFactory

Creates a GRPC channel.

The Channel class returns a grpc.Channel and is generated from the tag !channel. Creates either a secure or insecure channel.

Usage
- !channel
  address (str): Address for the channel. (For example,
    'localhost:50055' or 'unix:///tmp/sock')
  port (int): A port for the channel (only if no address was specified).
  insecure-mode: false
  credentials:
    tls-server-key: !expand-path ~/.config/buildgrid/server.key
    tls-server-cert: !expand-path ~/.config/buildgrid/server.cert
    tls-client-certs: !expand-path ~/.config/buildgrid/client.cert
Parameters:

  • port (int) – A port for the channel.

  • insecure_mode (bool) – If True, generates an insecure channel, even if there are credentials. Defaults to True.

  • credentials (dict, optional) –

    A dictionary in the form:

    tls-server-key: /path/to/server-key
tls-server-cert: /path/to/server-cert
tls-client-certs: /path/to/client-certs

yaml_tag: str | None = '!channel'
schema: str | None = 'misc/channel.yaml'
class buildgrid._app.settings.parser.ExpandPath(_yaml_filename: str, path: str)

Bases: YamlFactory

Returns a string of the user’s path after expansion.

The ExpandPath class returns a string and is generated from the tag !expand-path.

Usage
path: !expand-path ~/bgd-data/cas
Parameters:

path (str) – Can be used with strings such as: ~/dir/to/something or $HOME/certs

yaml_tag: str | None = '!expand-path'
class buildgrid._app.settings.parser.ExpandVars(_yaml_filename: str, path: str)

Bases: YamlFactory

Expand environment variables in a string.

The ExpandVars class returns a string and is generated from the tag !expand-vars.

Usage
endpoint: !expand-vars $ENDPOINT
Parameters:

path (str) – Can be used with strings such as: http://$ENDPOINT

yaml_tag: str | None = '!expand-vars'
class buildgrid._app.settings.parser.ReadFile(_yaml_filename: str, path)

Bases: YamlFactory

Returns a string of the contents of the specified file.

The ReadFile class returns a string and is generated from the tag !read-file.

Usage
secret_key: !read-file /var/bgd/s3-secret-key
Parameters:

path (str) – Can be used with strings such as: ~/path/to/some/file or $HOME/myfile or /path/to/file

yaml_tag: str | None = '!read-file'
class buildgrid._app.settings.parser.Disk(_yaml_filename: str, path: str)

Bases: YamlFactory

Generates buildgrid.server.cas.storage.disk.DiskStorage using the tag !disk-storage.

Usage
- !disk-storage
  path: /opt/bgd/cas-storage
Parameters:

path (str) – Path to directory to storage.

yaml_tag: str | None = '!disk-storage'
schema: str | None = 'storage/disk.yaml'
class buildgrid._app.settings.parser.LRU(_yaml_filename: str, size: str)

Bases: YamlFactory

Generates buildgrid.server.cas.storage.lru_memory_cache.LRUMemoryCache using the tag !lru-storage.

Usage
- !lru-storage
  size: 2048M
Parameters:

size (int) – Size e.g 10kb. Size parsed with buildgrid._app.settings.parser._parse_size().

yaml_tag: str | None = '!lru-storage'
schema: str | None = 'storage/lru.yaml'
class buildgrid._app.settings.parser.S3(_yaml_filename: str, bucket: str, endpoint: str, access_key: str, secret_key: str)

Bases: YamlFactory

Generates buildgrid.server.cas.storage.s3.S3Storage using the tag !s3-storage.

Usage
- !s3-storage
  bucket: bgd-bucket-{digest[0]}{digest[1]}
  endpoint: http://127.0.0.1:9000
  access_key: !read-file /var/bgd/s3-access-key
  secret_key: !read-file /var/bgd/s3-secret-key
Parameters:

  • bucket (str) – Name of bucket

  • endpoint (str) – URL of endpoint.

  • access-key (str) – S3-ACCESS-KEY

  • secret-key (str) – S3-SECRET-KEY

yaml_tag: str | None = '!s3-storage'
schema: str | None = 'storage/s3.yaml'
class buildgrid._app.settings.parser.Redis(_yaml_filename: str, host: str, port: int, password: str | None = None, db: int | None = None)

Bases: YamlFactory

Generates buildgrid.server.cas.storage.redis.RedisStorage using the tag !redis-storage.

Usage
- !redis-storage
  host: 127.0.0.1
  port: 6379
  password: !read-file /var/bgd/redis-pass
  db: 0
Parameters:

  • host (str) – hostname of endpoint.

  • port (int) – port on host.

  • password (str) – redis database password

  • db (int) – db number

yaml_tag: str | None = '!redis-storage'
schema: str | None = 'storage/redis.yaml'
class buildgrid._app.settings.parser.Remote(_yaml_filename: str, url: str, instance_name: str, credentials: Dict[str, str] | None = None, channel_options: Dict[str, Any] | None = None, retries: int = 3, max_backoff: int = 64, request_timeout: float | None = None)

Bases: YamlFactory

Generates buildgrid.server.cas.storage.remote.RemoteStorage using the tag !remote-storage.

Usage
- !remote-storage
  url: https://storage:50052/
  instance-name: main
  credentials:
    tls-server-key: !expand-path ~/.config/buildgrid/server.key
    tls-server-cert: !expand-path ~/.config/buildgrid/server.cert
    tls-client-certs: !expand-path ~/.config/buildgrid/client.cert
  channel-options:
    lb-policy-name: round_robin
  request-timeout: 15
Parameters:

  • url (str) – URL to remote storage. If used with https, needs credentials.

  • instance_name (str) – Instance of the remote to connect to.

  • credentials (dict, optional) –

    A dictionary in the form:

    tls-client-key: /path/to/client-key
tls-client-cert: /path/to/client-cert
tls-server-cert: /path/to/server-cert

  • channel-options (dict, optional) –

    A dictionary of grpc channel options in the form:

    some-channel-option: channel_value
other-channel-option: another-channel-value

  • https (See) – //github.com/grpc/grpc/blob/master/include/grpc/impl/codegen/grpc_types.h

  • options (for the valid channel) –

  • retries (int) – Max number of times to retry (default 3). Backoff between retries is about 2^(N-1), where N is the number of attempts

  • max_backoff (int) – Maximum backoff in seconds (default 64)

  • request_timeout (float) – gRPC request timeout in seconds (default None)

yaml_tag: str | None = '!remote-storage'
schema: str | None = 'storage/remote.yaml'
class buildgrid._app.settings.parser.WithCache(_yaml_filename: str, cache: StorageABC, fallback: StorageABC, defer_fallback_writes: bool = False, fallback_writer_threads: int = 20)

Bases: YamlFactory

Generates buildgrid.server.cas.storage.with_cache.WithCacheStorage using the tag !with-cache-storage.

Usage
- !with-cache-storage
  cache:
    !lru-storage
    size: 2048M
  fallback:
    !disk-storage
    path: /opt/bgd/cas-storage
  defer-fallback-writes: no
Parameters:

  • cache (StorageABC) – Storage instance to use as a cache

  • fallback (StorageABC) – Storage instance to use as a fallback on cache misses

  • defer-fallback-writes (bool) – If true, commit_write returns once writing to the cache is done, and the write into the fallback storage is done in a background thread

  • fallback-writer-threads (int) – The maximum number of threads to use for writing blobs into the fallback storage. Defaults to 20.

yaml_tag: str | None = '!with-cache-storage'
schema: str | None = 'storage/with-cache.yaml'
class buildgrid._app.settings.parser.SizeDifferentiated(_yaml_filename: str, size_limited_storages: List[_SizeLimitedStorageConfig], fallback: StorageABC)

Bases: YamlFactory

Generates buildgrid.server.cas.storage.size_differentiated.SizeDifferentiatedStorage using the tag !size-differentiated-storage.

Usage
- !size-differentiated-storage
  size-limited-storages:
    - max-size: 1M
      storage:
        !lru-storage
        size: 2048M
  fallback:
    !disk-storage
    path: /opt/bgd/cas-storage
Parameters:

  • size_limited_storages (list) – List of dictionaries. The dictionaries are expected to have max-size and storage keys, defining a storage provider to use to store blobs with size up to max-size.

  • fallback (StorageABC) – Storage instance to use as a fallback for blobs which are too big for the options defined in size_limited_storages.

yaml_tag: str | None = '!size-differentiated-storage'
schema: str | None = 'storage/size-differentiated.yaml'
class buildgrid._app.settings.parser.SQLConnection(_yaml_filename: str, automigrate: bool = False, connection_string: str | None = None, connection_timeout: int = 5, connect_args: Dict[str, Any] | None = None, max_overflow: int | None = None, pool_pre_ping: bool | None = None, pool_recycle: int | None = None, pool_size: int | None = None, pool_timeout: int | None = None)

Bases: YamlFactory

Generates buildgrid.server.sql.provider.SqlProvider using the tag !sql-connection.

Example

- !sql-connection &sql
  connection_string: postgresql://bgd:insecure@database/bgd
  automigrate: yes
  connection_timeout: 5
  pool-size: 5
  pool-timeout: 30
  max-overflow: 10
yaml_tag: str | None = '!sql-connection'
schema: str | None = 'connections/sql.yaml'
class buildgrid._app.settings.parser.SQLSchedulerConfig(_yaml_filename: str, storage: StorageABC, sql: SqlProvider | None = None, connection_string: str | None = None, automigrate: bool = False, connection_timeout: int = 5, pruner_job_max_age: Dict[str, float] | None = None, pruner_period: Dict[str, float] | None = None, pruner_max_delete_window: int | None = None, **kwargs)

Bases: YamlFactory

Generates buildgrid.server.persistence.sql.impl.SQLDataStore using the tag !sql-scheduler.

Example

- !sql-scheduler
  storage: *cas-storage
  sql: *sql
  pruner-job-max-age:
    days: 90

This usage example assumes that the cas-storage reference refers to a storage backend, eg. !disk-storage, and the sql reference refers to an SQL connection manager using !sql-connection.

Parameters:

  • storage (buildgrid.server.cas.storage.storage_abc.StorageABC) – Instance of storage to use for getting actions and storing job results. This must be an object constructed using a YAML tag ending in -storage, for example !disk-storage.

  • sql (buildgrid.server.sql.provider.SqlProvider) – A configured SQL connection manager. This must be an object with an !sql-connection YAML tag.

  • pruner_job_max_age (dict) – Allow the storage to remove old entries by specifying the maximum amount of time that a row should be kept after its job finished. If this value is None, pruning is disabled and the background pruning thread is never created.

  • pruner_period (dict) – How often to attempt to remove old entries. If pruning is enabled (see above) and this value is None, it is set to 5 minutes by default.

  • pruner_max_delete_window (int) – Maximum number of records removed in a single cleanup pass. If pruning is enabled and this value is None, it is set to 10000 by default. This allows to put a limit on the time that the database will be blocked on a single invocation of the cleanup routine. (A smaller value reduces the performance impact of removing entries, but makes the recovery of storage space slower.)

  • connection_string (str) –

    SQLAlchemy connection string to use for connecting to the database.

    This parameter is deprecated in favour of sql.

  • automigrate (bool) –

    Whether to attempt to automatically upgrade an existing DB schema to the newest version (this will also create everything from scratch if given an empty database).

    This parameter is deprecated in favour of sql.

  • connection_timeout (int) –

    Time to wait for an SQLAlchemy connection to be available in the pool before timing out.

    This parameter is deprecated in favour of sql.

yaml_tag: str | None = '!sql-scheduler'
schema: str | None = 'scheduler/sql.yaml'
class buildgrid._app.settings.parser.SQLDataStoreConfig(_yaml_filename: str, storage: StorageABC, connection_string: str | None = None, automigrate: bool = False, connection_timeout: int = 5, **kwargs)

Bases: YamlFactory

Generates buildgrid.server.persistence.sql.impl.SQLDataStore using the tag !sql-data-store.

Warning

This is deprecated and only used for compatibility with old configs.

Usage
- !sql-data-store
  # This assumes that a storage instance is defined elsewhere
  # with a `&cas-storage` anchor
  storage: *cas-storage
  connection_string: postgresql://bgd:insecure@database/bgd
  automigrate: yes
  connection_timeout: 5
Parameters:

  • storage (buildgrid.server.cas.storage.storage_abc.StorageABC) – Instance of storage to use for getting actions and storing job results. This must be an object constructed using a YAML tag ending in -storage, for example !disk-storage.

  • connection_string (str) – SQLAlchemy connection string to use for connecting to the database.

  • automigrate (bool) – Whether to attempt to automatically upgrade an existing DB schema to the newest version (this will also create everything from scratch if given an empty database).

  • connection_timeout (int) – Time to wait for an SQLAlchemy connection to be available in the pool before timing out.

yaml_tag: str | None = '!sql-data-store'
schema: str | None = 'scheduler/sql.yaml'
class buildgrid._app.settings.parser.MemorySchedulerConfig(_yaml_filename: str, storage: StorageABC)

Bases: YamlFactory

Generates buildgrid.server.persistence.mem.impl.MemoryDataStore using the tag !memory-scheduler.

Usage
- !memory-scheduler
  # This assumes that a storage instance is defined elsewhere
  # with a `&cas-storage` anchor
  storage: *cas-storage
Parameters:

storage (buildgrid.server.cas.storage.storage_abc.StorageABC) – Instance of storage to use for getting actions and storing job results. This must be an object constructed using a YAML tag ending in -storage, for example !disk-storage.

yaml_tag: str | None = '!memory-scheduler'
schema: str | None = 'scheduler/memory.yaml'
class buildgrid._app.settings.parser.MemoryDataStoreConfig(_yaml_filename: str, storage: StorageABC)

Bases: YamlFactory

Generates buildgrid.server.persistence.mem.impl.MemoryDataStore using the tag !memory-data-store.

Warning

This is deprecated and only used for compatibility with old configs. Use MemorySchedulerConfig instead.

Usage
- !memory-data-store
  # This assumes that a storage instance is defined elsewhere
  # with a `&cas-storage` anchor
  storage: *cas-storage
Parameters:

storage (buildgrid.server.cas.storage.storage_abc.StorageABC) – Instance of storage to use for getting actions and storing job results. This must be an object constructed using a YAML tag ending in -storage, for example !disk-storage.

yaml_tag: str | None = '!memory-data-store'
schema: str | None = 'scheduler/memory.yaml'
class buildgrid._app.settings.parser.SQL_Index(_yaml_filename: str, storage: StorageABC, connection_string: str | None = None, sql: SqlProvider | None = None, automigrate: bool = False, window_size: int = 1000, inclause_limit: int = -1, fallback_on_get: bool = False, max_inline_blob_size: int = 0, refresh_accesstime_older_than: int = 0, **kwargs)

Bases: YamlFactory

Generates buildgrid.server.cas.storage.index.sql.SQLIndex using the tag !sql-index.

Usage
- !sql-index
  # This assumes that a storage instance is defined elsewhere
  # with a `&cas-storage` anchor
  storage: *cas-storage
  sql: *sql
  window-size: 1000
  inclause-limit: -1
  fallback-on-get: no
  max-inline-blob-size: 256
  refresh-accesstime-older-than: 0
Parameters:

  • storage (buildgrid.server.cas.storage.storage_abc.StorageABC) – Instance of storage to use. This must be a storage object constructed using a YAML tag ending in -storage, for example !disk-storage.

  • connection_string (str) – SQLAlchemy connection string

  • automigrate (bool) – Attempt to automatically upgrade an existing DB schema to the newest version.

  • window_size (uint) – Maximum number of blobs to fetch in one SQL operation (larger resultsets will be automatically split into multiple queries)

  • inclause_limit (int) – If nonnegative, overrides the default number of variables permitted per “in” clause. See the buildgrid.server.cas.storage.index.sql.SQLIndex comments for more details.

  • fallback_on_get (bool) – By default, the SQL Index only fetches blobs from the underlying storage if they’re present in the index on get_blob/bulk_read_blobs requests to minimize interactions with the storage. If this is set, the index instead checks the underlying storage directly on get_blob/bulk_read_blobs requests, then loads all blobs found into the index.

  • max_inline_blob_size (int) – Blobs of this size or smaller are stored directly in the index and not in the backing storage (must be nonnegative).

  • refresh-accesstime-older-than (int) – When reading a blob, its access timestamp will not be updated if the current time is not at least refresh-accesstime-older-than seconds newer than the access timestamp. Set this to reduce load associated with frequent timestamp updates.

yaml_tag: str | None = '!sql-index'
schema: str | None = 'storage/sql-index.yaml'
class buildgrid._app.settings.parser.Execution(_yaml_filename: str, storage, action_cache=None, action_browser_url=None, data_store=None, scheduler=None, property_keys=None, wildcard_property_keys=None, operation_stream_keepalive_timeout=600, bot_session_keepalive_timeout=600, permissive_bot_session=False, endpoints=('execution', 'operations', 'bots'), discard_unwatched_jobs=False, max_execution_timeout=7200, max_list_operations_page_size=1000, logstream=None, metering_service_client: MeteringServiceClient | None = None)

Bases: YamlFactory

Generates buildgrid.server.execution.service.ExecutionService using the tag !execution.

Usage
# This assumes that the YAML anchors are defined elsewhere
- !execution
  storage: *cas-storage
  action-cache: *remote-cache
  action-browser-url: http://localhost:8080
  scheduler: *state-database
  property-keys:
    - runnerType
  wildcard-property-keys:
    - chrootDigest
  operation-stream-keepalive-timeout: 600
  bot-session-keepalive-timeout: 600
  endpoints:
    - execution
    - operations
    - bots
  discard-unwatched-jobs: no
  max-execution-timeout: 7200
  max-list-operations-page-size: 1000
Parameters:

  • storage (buildgrid.server.cas.storage.storage_abc.StorageABC) – Instance of storage to use. This must be an object constructed using a YAML tag ending in -storage, for example !disk-storage.

  • action_cache (ActionCache) – Instance of action cache to use.

  • action_browser_url (str) – The base URL to use to generate Action Browser links to users

  • scheduler (DataStoreInterface) – Instance of data store to use for the scheduler’s state.

  • property_keys (list) – The platform property keys available to use in routing Actions to workers

  • wildcard_property_keys (list) – The platform property keys which can be set in Actions but are not used to select workers

  • operation_stream_keepalive_timeout (int) – The longest time (in seconds) we’ll wait before sending the current status in an Operation response stream of an Execute or WaitExecution request. Defaults to 600s (10 minutes).

  • bot_session_keepalive_timeout (int) – The longest time (in seconds) we’ll wait for a bot to send an update before it assumes it’s dead. Defaults to 600s (10 minutes).

  • permissive_bot_session – Whether to accept UpdateBotSession requests from bots that haven’t explicitly called CreateBotSession with this particular server instance.

  • endpoints (list) – List of service/endpoint types to enable. Possible services are execution, operations, and bots. By default all three are enabled.

  • discard_unwatched_jobs (bool) – Allow operation id to persist without a client connection.

  • max_execution_timeout (int) – The maximum time jobs are allowed to be in ‘OperationStage.EXECUTING’. This is a lazy check tha happens before job deduplication and when new peers register for an ongoing Operation. When this time is exceeded in executing stage, the job will be cancelled.

  • max_list_operations_page_size (int) – The maximum number of operations that can be returned in a ListOperations response. A page token will be returned with the response to allow the client to get the next page of results.

  • metering_service_client – Optional client to check whether resource usage of a client is above a predefined threshold

yaml_tag: str | None = '!execution'
schema: str | None = 'services/execution.yaml'
class buildgrid._app.settings.parser.Bots(_yaml_filename: str, storage, action_cache=None, bot_session_keepalive_timeout=600, data_store=None, scheduler=None, permissive_bot_session=False, logstream=None, metering_service_client: MeteringServiceClient | None = None)

Bases: YamlFactory

Generates buildgrid.server.bots.instance.BotsInterface using the tag !bots.

Usage
# This assumes that the YAML anchors are defined elsewhere
- !bots
  storage: *cas-storage
  action-cache: *remote-cache
  scheduler: *state-database
  bot-session-keepalive-timeout: 600
  permissive-bot-session: yes
Parameters:

  • storage (buildgrid.server.cas.storage.storage_abc.StorageABC) – Instance of storage to use. This must be an object constructed using a YAML tag ending in -storage, for example !disk-storage.

  • action_cache (Action) – Instance of action cache to use.

  • scheduler (DataStoreInterface) – Instance of data store to use for the scheduler’s state.

  • bot_session_keepalive_timeout (int) – The longest time (in seconds) we’ll wait for a bot to send an update before it assumes it’s dead. Defaults to 600s (10 minutes).

  • permissive_bot_session – Whether to accept UpdateBotSession requests from bots that haven’t explicitly called CreateBotSession with this particular server instance.

  • metering_service_client – Optional client to publish resource usage of operations

yaml_tag: str | None = '!bots'
schema: str | None = 'services/bots.yaml'
class buildgrid._app.settings.parser.Action(_yaml_filename: str, storage: StorageABC | None = None, max_cached_refs: int | None = None, allow_updates: bool = True, cache_failed_actions: bool = True, cache: ActionCacheABC | None = None)

Bases: YamlFactory

Generates buildgrid.server.actioncache.service.ActionCacheService using the tag !action-cache.

Usage
# This assumes that the YAML anchors are defined elsewhere
- !action-cache
  cache: *lru-cache
Parameters:

cache (ActionCacheABC) – The ActionCache backend to use for this cache.

yaml_tag: str | None = '!action-cache'
schema: str | None = 'services/action-cache.yaml'
class buildgrid._app.settings.parser.WithCacheAction(_yaml_filename: str, cache: ActionCacheABC, fallback: ActionCacheABC, allow_updates: bool = True, cache_failed_actions: bool = True)

Bases: YamlFactory

Generates:class:buildgrid.server.actioncache.caches.with_cache.WithCacheActionCache using the tag !with-cache-action-cache.

Usage
# This assumes that the YAML anchors are defined elsewhere
- !with-cache-action-cache
  storage: *cas-storage
  cache: *cache-ac
  fallback: *fallback-ac
Parameters:

  • cache (ActionCacheABC) – ActionCache instance to use as a local cache

  • fallback (ActionCacheABC) – ActionCache instance to use as a fallback on local cache misses

  • allow_updates (bool) – Allow updates pushed to the Action Cache. Defaults to True.

  • cache_failed_actions (bool) – Whether to store failed (non-zero exit code) actions. Default to True.

yaml_tag: str | None = '!with-cache-action-cache'
schema: str | None = 'caches/with-cache.yaml'
class buildgrid._app.settings.parser.LruAction(_yaml_filename: str, storage: StorageABC, max_cached_refs: int, allow_updates: bool = True, cache_failed_actions: bool = True)

Bases: YamlFactory

Generates buildgrid.server.actioncache.caches.lru_cache.LruActionCache using the tag !lru-action-cache.

Usage
# This assumes that the YAML anchors are defined elsewhere
- !lru-action-cache
  storage: *cas-storage
  max-cached-refs: 1024
  cache-failed-actions: yes
  allow-updates: yes
Parameters:

  • storage (buildgrid.server.cas.storage.storage_abc.StorageABC) – Instance of storage to use.

  • max_cached_refs (int) – Max number of cached actions.

  • allow_updates (bool) – Allow updates pushed to the Action Cache. Defaults to True.

  • cache_failed_actions (bool) – Whether to store failed (non-zero exit code) actions. Default to True.

yaml_tag: str | None = '!lru-action-cache'
schema: str | None = 'caches/lru-action-cache.yaml'
class buildgrid._app.settings.parser.S3Action(_yaml_filename: str, storage: StorageABC, allow_updates: bool = True, cache_failed_actions: bool = True, entry_type: str | None = None, migrate_entries: bool | None = False, bucket: str | None = None, endpoint: str | None = None, access_key: str | None = None, secret_key: str | None = None)

Bases: YamlFactory

Generates buildgrid.server.actioncache.caches.s3_cache.S3ActionCache using the tag !s3action-cache.

Usage
# This assumes that the YAML anchors are defined elsewhere
- !s3action-cache
  storage: *cas-storage
  allow-updates: yes
  cache-failed-actions: yes
  entry-type: action-result-digest
  migrate-entries: no
  bucket: bgd-action-cache
  endpoint: http://localhost:9000/
  access-key: !read-file /var/bgd/s3-access-key
  secret-key: !read-file /var/bgd/s3-secret-key
Parameters:

  • storage (buildgrid.server.cas.storage.storage_abc.StorageABC) – Instance of storage to use. This must be an object constructed using a YAML tag ending in -storage, for example !disk-storage.

  • allow_updates (bool) – Allow updates pushed to the Action Cache. Defaults to True.

  • cache_failed_actions (bool) – Whether to store failed (non-zero exit code) actions. Default to True.

  • entry_type (str) – whether entries in S3 will store an 'action-result' or an 'action-result-digest' (default).

  • migrate_entries (bool) – Whether to automatically update the values of entries that contain a different type of value to entry_type as they are queried. Default to False.

  • bucket (str) – Name of bucket

  • endpoint (str) – URL of endpoint.

  • access-key (str) – S3-ACCESS-KEY

  • secret-key (str) – S3-SECRET-KEY

yaml_tag: str | None = '!s3action-cache'
schema: str | None = 'services/s3-action-cache.yaml'
class buildgrid._app.settings.parser.RemoteAction(_yaml_filename: str, url: str, instance_name: str, retries: int = 3, max_backoff: int = 64, request_timeout: float | None = None, credentials: Dict[str, str] | None = None, channel_options: Dict[str, Any] | None = None)

Bases: YamlFactory

Generates buildgrid.server.actioncache.caches.remote.RemoteActionCache using the tag !remote-action-cache.

Usage
- !remote-action-cache
  url: https://action-cache:50053
  instance-name: main
  credentials:
    tls-server-key: !expand-path ~/.config/buildgrid/server.key
    tls-server-cert: !expand-path ~/.config/buildgrid/server.cert
    tls-client-certs: !expand-path ~/.config/buildgrid/client.cert
  channel-options:
    lb-policy-name: round_robin
Parameters:

  • url (str) – URL to remote action cache. If used with https, needs credentials.

  • instance_name (str) – Instance of the remote to connect to.

  • credentials (dict, optional) –

    A dictionary in the form:

    tls-client-key: /path/to/client-key
tls-client-cert: /path/to/client-cert
tls-server-cert: /path/to/server-cert

  • channel-options (dict, optional) –

    A dictionary of grpc channel options in the form:

    some-channel-option: channel_value
other-channel-option: another-channel-value

  • https (See) – //github.com/grpc/grpc/blob/master/include/grpc/impl/codegen/grpc_types.h

  • options (for the valid channel) –

yaml_tag: str | None = '!remote-action-cache'
schema: str | None = 'services/remote-action-cache.yaml'
class buildgrid._app.settings.parser.WriteOnceAction(_yaml_filename: str, action_cache)

Bases: YamlFactory

Generates buildgrid.server.actioncache.caches.write_once_cache.WriteOnceActionCache using the tag !write-once-action-cache.

This allows a single update for a given key, essentially making it possible to create immutable ActionCache entries, rather than making the cache read-only as the allow-updates property of other ActionCache implementations does.

Usage
# This assumes that the YAML anchors are defined elsewhere
- !write-once-action-cache
  action-cache: *remote-cache
Parameters:

action_cache (ActionCache) – The action cache instance to make immutable.

yaml_tag: str | None = '!write-once-action-cache'
schema: str | None = 'services/write-once-action-cache.yaml'
class buildgrid._app.settings.parser.RedisAction(_yaml_filename: str, storage: StorageABC, host: str | None = None, port: int | None = None, allow_updates: bool = True, cache_failed_actions: bool = True, entry_type: str | None = None, migrate_entries: bool | None = False, password: str | None = None, db: int = 0, dns_srv_record: str | None = None, sentinel_master_name: str | None = None, retries: int = 3)

Bases: YamlFactory

Generates buildgrid.server.actioncache.caches.redis_cache.RedisActionCache using the tag !redis-action-cache.

This creates an Action Cache which stores the mapping from Action digests to ActionResults in Redis.

Usage
# This assumes that the YAML anchors are defined elsewhere
- !redis-action-cache
  storage: *cas-storage
  allow-updates: yes
  cache-failed-actions: yes
  entry-type: action-result-digest
  migrate-entries: no
  host: redis
  port: 6379
  db: 0
  dns-srv-record: <Domain name of SRV record>
  sentinel-master-name: <service_name of Redis sentinel's master instance>
  retries: 3
Parameters:

  • storage (buildgrid.server.cas.storage.storage_abc.StorageABC) – Instance of storage to use. This must be an object constructed using a YAML tag ending in -storage, for example !disk-storage.

  • allow_updates (bool) – Allow updates pushed to the Action Cache. Defaults to True.

  • cache_failed_actions (bool) – Whether to store failed (non-zero exit code) actions. Default to True.

  • entry_type (str) – whether entries in Redis will store an 'action-result' or an 'action-result-digest' (default).

  • migrate_entries (bool) – Whether to automatically update the values of entries that contain a different type of value to entry_type as they are queried. Default to False.

  • host (str) – The hostname of the Redis server to use.

  • port (int) – The port that Redis is served on.

  • db (int) – The Redis database number to use.

  • dns-srv-record (str) – Domain name of SRV record used to discover host/port

  • sentinel-master-name (str) – Service name of Redis master instance, used in a Redis sentinel configuration

  • retries (int) – Max number of times to retry (default 3). Backoff between retries is about 2^(N-1), where N is the number of attempts

yaml_tag: str | None = '!redis-action-cache'
schema: str | None = 'caches/redis-action-cache.yaml'
class buildgrid._app.settings.parser.Reference(_yaml_filename: str, storage: StorageABC, max_cached_refs: int, allow_updates: bool = True)

Bases: YamlFactory

Generates buildgrid.server.referencestorage.service.ReferenceStorageService using the tag !reference-cache.

Note

This is intended for use by old versions of BuildStream as an artifact cache, and isn’t part of the REAPI/RWAPI specifications. There’s no need for this component if you aren’t using BuildStream.

Usage
# This assumes that the YAML anchors are defined elsewhere
- !reference-storage
  storage: *cas-storage
  max-cached-refs: 1024
  allow-updates: yes
Parameters:

  • storage (buildgrid.server.cas.storage.storage_abc.StorageABC) – Instance of storage to use. This must be an object constructed using a YAML tag ending in -storage, for example !disk-storage.

  • max_cached_refs (int) – Max number of cached actions.

  • allow_updates (bool) – Allow updates pushed to CAS. Defaults to True.

yaml_tag: str | None = '!reference-cache'
schema: str | None = 'services/reference-cache.yaml'
class buildgrid._app.settings.parser.CAS(_yaml_filename: str, storage: StorageABC, read_only: bool = False)

Bases: YamlFactory

Generates buildgrid.server.cas.service.ContentAddressableStorageService using the tag !cas.

Usage
# This assumes that the YAML anchors are defined elsewhere
- !cas
  storage: *cas-storage
Parameters:

storage (buildgrid.server.cas.storage.storage_abc.StorageABC) – Instance of storage to use. This must be an object constructed using a YAML tag ending in -storage, for example !disk-storage.

yaml_tag: str | None = '!cas'
schema: str | None = 'services/cas.yaml'
class buildgrid._app.settings.parser.ByteStream(_yaml_filename: str, storage: StorageABC | None = None, stream_storage: StreamStorageABC | None = None, read_only: bool = False, disable_overwrite_early_return: bool = False)

Bases: YamlFactory

Generates buildgrid.server.cas.service.ByteStreamService using the tag !bytestream.

Usage
# This assumes that the YAML anchors are defined elsewhere
- !bytestream
  storage: *cas-storage
Parameters:

storage (buildgrid.server.cas.storage.storage_abc.StorageABC) – Instance of storage to use. This must be an object constructed using a YAML tag ending in -storage, for example !disk-storage.

yaml_tag: str | None = '!bytestream'
schema: str | None = 'services/bytestream.yaml'
class buildgrid._app.settings.parser.LogStream(_yaml_filename: str, prefix='', stream_storage=None)

Bases: YamlFactory

Generates buildgrid.server.cas.logstream.instance.LogStreamInstance using the tag !logstream.

Usage
- !logstream
  prefix: test
yaml_tag: str | None = '!logstream'
schema: str | None = 'services/logstream.yaml'
class buildgrid._app.settings.parser.MemoryStream(_yaml_filename: str, *args, **kwargs)

Bases: YamlFactory

Generates buildgrid.server.cas.logstream.stream_storage.MemoryStreamStorage using the tag !memory-logstream-storage.

Usage
- !memory-logstream-storage
yaml_tag: str | None = '!memory-logstream-storage'
class buildgrid._app.settings.parser.MemoryBuildEvents(_yaml_filename: str, *args, **kwargs)

Bases: YamlFactory

Generates buildgrid.server.build_events.storage.BuildEventStreamStorage using the tag !memory-build-events-storage.

Usage
- !memory-build-events
yaml_tag: str | None = '!memory-build-events'
class buildgrid._app.settings.parser.MeteringServiceClientFactory(_yaml_filename: str, base_url: str, token_path: str | None = None)

Bases: YamlFactory

Generates buildgrid_metering.client.MeteringServiceClient using the tag !metering-service-client.

Usage
- !metering-service-client
  token-path: /tmp/path/to/token
yaml_tag: str | None = '!metering-service-client'
schema: str | None = 'clients/metering-service-client.yaml'
buildgrid._app.settings.parser.get_logstream_connection_info(logstream) → Tuple[str | None, Dict[str, str] | None, str | None]
buildgrid._app.settings.parser.get_parser()
buildgrid._app.settings.parser.get_schema()
buildgrid._app.settings.parser.check_type(*expected_types: Any) → Callable[[Any, Any], bool]
buildgrid._app.settings.parser.get_validator(schema=None)