class ServeController:
"""Responsible for managing the state of the serving system.
The controller implements fault tolerance by persisting its state in
a new checkpoint each time a state change is made. If the actor crashes,
the latest checkpoint is loaded and the state is recovered. Checkpoints
are written/read using a provided KV-store interface.
All hard state in the system is maintained by this actor and persisted via
these checkpoints. Soft state required by other components is fetched by
those actors from this actor on startup and updates are pushed out from
this actor.
All other actors started by the controller are named, detached actors
so they will not fate share with the controller if it crashes.
The following guarantees are provided for state-changing calls to the
controller:
- If the call succeeds, the change was made and will be reflected in
the system even if the controller or other actors die unexpectedly.
- If the call fails, the change may have been made but isn't guaranteed
to have been. The client should retry in this case. Note that this
requires all implementations here to be idempotent.
"""
async def __init__(self,
controller_name: str,
http_config: HTTPOptions,
detached: bool = False):
# Used to read/write checkpoints.
self.kv_store = RayInternalKVStore(namespace=controller_name)
# Dictionary of backend_tag -> proxy_name -> most recent queue length.
self.backend_stats = defaultdict(lambda: defaultdict(dict))
# Used to ensure that only a single state-changing operation happens
# at any given time.
self.write_lock = asyncio.Lock()
# NOTE(simon): Currently we do all-to-all broadcast. This means
# any listeners will receive notification for all changes. This
# can be problem at scale, e.g. updating a single backend config
# will send over the entire configs. In the future, we should
# optimize the logic to support subscription by key.
self.long_poll_host = LongPollHost()
self.goal_manager = AsyncGoalManager()
self.http_state = HTTPState(controller_name, detached, http_config)
self.endpoint_state = EndpointState(self.kv_store, self.long_poll_host)
self.backend_state = BackendState(controller_name, detached,
self.kv_store, self.long_poll_host,
self.goal_manager)
asyncio.get_event_loop().create_task(self.run_control_loop())
async def wait_for_goal(self, goal_id: GoalId) -> None:
await self.goal_manager.wait_for_goal(goal_id)
async def _num_pending_goals(self) -> int:
return self.goal_manager.num_pending_goals()
async def listen_for_change(self, keys_to_snapshot_ids: Dict[str, int]):
"""Proxy long pull client's listen request.
Args:
keys_to_snapshot_ids (Dict[str, int]): Snapshot IDs are used to
determine whether or not the host should immediately return the
data or wait for the value to be changed.
"""
return await (
self.long_poll_host.listen_for_change(keys_to_snapshot_ids))
def get_http_proxies(self) -> Dict[NodeId, ActorHandle]:
"""Returns a dictionary of node ID to http_proxy actor handles."""
return self.http_state.get_http_proxy_handles()
async def run_control_loop(self) -> None:
while True:
async with self.write_lock:
self.http_state.update()
self.backend_state.update()
await asyncio.sleep(CONTROL_LOOP_PERIOD_S)
def _all_replica_handles(
self) -> Dict[BackendTag, Dict[ReplicaTag, ActorHandle]]:
"""Used for testing."""
return self.backend_state.get_running_replica_handles()
def get_all_backends(self) -> Dict[BackendTag, BackendConfig]:
"""Returns a dictionary of backend tag to backend config."""
return self.backend_state.get_backend_configs()
def get_all_endpoints(self) -> Dict[EndpointTag, Dict[BackendTag, Any]]:
"""Returns a dictionary of backend tag to backend config."""
return self.endpoint_state.get_endpoints()
def _validate_traffic_dict(self, traffic_dict: Dict[str, float]):
for backend in traffic_dict:
if self.backend_state.get_backend(backend) is None:
raise ValueError(
"Attempted to assign traffic to a backend '{}' that "
"is not registered.".format(backend))
async def set_traffic(self, endpoint: str,
traffic_dict: Dict[str, float]) -> None:
"""Sets the traffic policy for the specified endpoint."""
async with self.write_lock:
self._validate_traffic_dict(traffic_dict)
logger.info("Setting traffic for endpoint "
f"'{endpoint}' to '{traffic_dict}'.")
self.endpoint_state.set_traffic_policy(endpoint,
TrafficPolicy(traffic_dict))
async def shadow_traffic(self, endpoint_name: str, backend_tag: BackendTag,
proportion: float) -> None:
"""Shadow traffic from the endpoint to the backend."""
async with self.write_lock:
if self.backend_state.get_backend(backend_tag) is None:
raise ValueError(
"Attempted to shadow traffic to a backend '{}' that "
"is not registered.".format(backend_tag))
logger.info(
"Shadowing '{}' of traffic to endpoint '{}' to backend '{}'.".
format(proportion, endpoint_name, backend_tag))
self.endpoint_state.shadow_traffic(endpoint_name, backend_tag,
proportion)
async def create_endpoint(
self,
endpoint: str,
traffic_dict: Dict[str, float],
route: Optional[str],
methods: List[str],
) -> None:
"""Create a new endpoint with the specified route and methods.
If the route is None, this is a "headless" endpoint that will not
be exposed over HTTP and can only be accessed via a handle.
"""
async with self.write_lock:
self._validate_traffic_dict(traffic_dict)
logger.info(
"Registering route '{}' to endpoint '{}' with methods '{}'.".
format(route, endpoint, methods))
self.endpoint_state.create_endpoint(endpoint, route, methods,
TrafficPolicy(traffic_dict))
async def delete_endpoint(self, endpoint: str) -> None:
"""Delete the specified endpoint.
Does not modify any corresponding backends.
"""
logger.info("Deleting endpoint '{}'".format(endpoint))
async with self.write_lock:
self.endpoint_state.delete_endpoint(endpoint)
async def create_backend(
self, backend_tag: BackendTag, backend_config: BackendConfig,
replica_config: ReplicaConfig) -> Optional[GoalId]:
"""Register a new backend under the specified tag."""
async with self.write_lock:
return self.backend_state.deploy_backend(backend_tag,
backend_config,
replica_config)
async def delete_backend(self,
backend_tag: BackendTag,
force_kill: bool = False) -> Optional[GoalId]:
async with self.write_lock:
# Check that the specified backend isn't used by any endpoints.
for endpoint, info in self.endpoint_state.get_endpoints().items():
if (backend_tag in info["traffic"]
or backend_tag in info["shadows"]):
raise ValueError("Backend '{}' is used by endpoint '{}' "
"and cannot be deleted. Please remove "
"the backend from all endpoints and try "
"again.".format(backend_tag, endpoint))
return self.backend_state.delete_backend(backend_tag, force_kill)
async def update_backend_config(self, backend_tag: BackendTag,
config_options: BackendConfig) -> GoalId:
"""Set the config for the specified backend."""
async with self.write_lock:
existing_backend_info = self.backend_state.get_backend(backend_tag)
if existing_backend_info is None:
raise ValueError(f"Backend {backend_tag} is not registered.")
existing_replica_config = existing_backend_info.replica_config
new_backend_config = existing_backend_info.backend_config.copy(
update=config_options.dict(exclude_unset=True))
return self.backend_state.deploy_backend(backend_tag,
new_backend_config,
existing_replica_config)
def get_backend_config(self, backend_tag: BackendTag) -> BackendConfig:
"""Get the current config for the specified backend."""
if self.backend_state.get_backend(backend_tag) is None:
raise ValueError(f"Backend {backend_tag} is not registered.")
return self.backend_state.get_backend(backend_tag).backend_config
def get_http_config(self):
"""Return the HTTP proxy configuration."""
return self.http_state.get_config()
async def shutdown(self) -> None:
"""Shuts down the serve instance completely."""
async with self.write_lock:
for proxy in self.http_state.get_http_proxy_handles().values():
ray.kill(proxy, no_restart=True)
for replica_dict in self.backend_state.get_running_replica_handles(
).values():
for replica in replica_dict.values():
ray.kill(replica, no_restart=True)
self.kv_store.delete(CHECKPOINT_KEY)
async def deploy(self, name: str, backend_config: BackendConfig,
replica_config: ReplicaConfig,
version: Optional[str]) -> Optional[GoalId]:
"""TODO."""
async with self.write_lock:
if version is None:
version = RESERVED_VERSION_TAG
else:
if version == RESERVED_VERSION_TAG:
# TODO(edoakes): this is unlikely to ever be hit, but it's
# still ugly and should be removed once the old codepath
# can be deleted.
raise ValueError(
f"Version {RESERVED_VERSION_TAG} is reserved and "
"cannot be used by applications.")
goal_id = self.backend_state.deploy_backend(
name, backend_config, replica_config, version)
self.endpoint_state.create_endpoint(name, f"/{name}",
["GET", "POST"],
TrafficPolicy({name: 1.0}))
return goal_id
class ServeController:
"""Responsible for managing the state of the serving system.
The controller implements fault tolerance by persisting its state in
a new checkpoint each time a state change is made. If the actor crashes,
the latest checkpoint is loaded and the state is recovered. Checkpoints
are written/read using a provided KV-store interface.
All hard state in the system is maintained by this actor and persisted via
these checkpoints. Soft state required by other components is fetched by
those actors from this actor on startup and updates are pushed out from
this actor.
All other actors started by the controller are named, detached actors
so they will not fate share with the controller if it crashes.
The following guarantees are provided for state-changing calls to the
controller:
- If the call succeeds, the change was made and will be reflected in
the system even if the controller or other actors die unexpectedly.
- If the call fails, the change may have been made but isn't guaranteed
to have been. The client should retry in this case. Note that this
requires all implementations here to be idempotent.
"""
async def __init__(self,
controller_name: str,
http_config: HTTPOptions,
detached: bool = False):
# Used to read/write checkpoints.
self.kv_store = RayInternalKVStore(namespace=controller_name)
# Dictionary of backend_tag -> proxy_name -> most recent queue length.
self.backend_stats = defaultdict(lambda: defaultdict(dict))
# Used to ensure that only a single state-changing operation happens
# at any given time.
self.write_lock = asyncio.Lock()
self.long_poll_host = LongPollHost()
self.goal_manager = AsyncGoalManager()
self.http_state = HTTPState(controller_name, detached, http_config)
self.endpoint_state = EndpointState(self.kv_store, self.long_poll_host)
self.backend_state = BackendState(controller_name, detached,
self.kv_store, self.long_poll_host,
self.goal_manager)
asyncio.get_event_loop().create_task(self.run_control_loop())
async def wait_for_goal(self, goal_id: GoalId) -> None:
await self.goal_manager.wait_for_goal(goal_id)
async def _num_pending_goals(self) -> int:
return self.goal_manager.num_pending_goals()
async def listen_for_change(self, keys_to_snapshot_ids: Dict[str, int]):
"""Proxy long pull client's listen request.
Args:
keys_to_snapshot_ids (Dict[str, int]): Snapshot IDs are used to
determine whether or not the host should immediately return the
data or wait for the value to be changed.
"""
return await (
self.long_poll_host.listen_for_change(keys_to_snapshot_ids))
def get_http_proxies(self) -> Dict[NodeId, ActorHandle]:
"""Returns a dictionary of node ID to http_proxy actor handles."""
return self.http_state.get_http_proxy_handles()
async def run_control_loop(self) -> None:
while True:
async with self.write_lock:
try:
self.http_state.update()
except Exception as e:
logger.error(f"Exception updating HTTP state: {e}")
try:
self.backend_state.update()
except Exception as e:
logger.error(f"Exception updating backend state: {e}")
await asyncio.sleep(CONTROL_LOOP_PERIOD_S)
def _all_replica_handles(
self) -> Dict[BackendTag, Dict[ReplicaTag, ActorHandle]]:
"""Used for testing."""
return self.backend_state.get_running_replica_handles()
def get_all_backends(self) -> Dict[BackendTag, BackendConfig]:
"""Returns a dictionary of backend tag to backend config."""
return self.backend_state.get_backend_configs()
def get_all_endpoints(self) -> Dict[EndpointTag, Dict[BackendTag, Any]]:
"""Returns a dictionary of backend tag to backend config."""
return self.endpoint_state.get_endpoints()
def _validate_traffic_dict(self, traffic_dict: Dict[str, float]):
for backend in traffic_dict:
if self.backend_state.get_backend(backend) is None:
raise ValueError(
"Attempted to assign traffic to a backend '{}' that "
"is not registered.".format(backend))
async def set_traffic(self, endpoint: str,
traffic_dict: Dict[str, float]) -> None:
"""Sets the traffic policy for the specified endpoint."""
async with self.write_lock:
self._validate_traffic_dict(traffic_dict)
logger.info("Setting traffic for endpoint "
f"'{endpoint}' to '{traffic_dict}'.")
self.endpoint_state.set_traffic_policy(endpoint,
TrafficPolicy(traffic_dict))
async def shadow_traffic(self, endpoint_name: str, backend_tag: BackendTag,
proportion: float) -> None:
"""Shadow traffic from the endpoint to the backend."""
async with self.write_lock:
if self.backend_state.get_backend(backend_tag) is None:
raise ValueError(
"Attempted to shadow traffic to a backend '{}' that "
"is not registered.".format(backend_tag))
logger.info(
"Shadowing '{}' of traffic to endpoint '{}' to backend '{}'.".
format(proportion, endpoint_name, backend_tag))
self.endpoint_state.shadow_traffic(endpoint_name, backend_tag,
proportion)
async def create_endpoint(
self,
endpoint: str,
traffic_dict: Dict[str, float],
route: Optional[str],
methods: Set[str],
) -> None:
"""Create a new endpoint with the specified route and methods.
If the route is None, this is a "headless" endpoint that will not
be exposed over HTTP and can only be accessed via a handle.
"""
async with self.write_lock:
self._validate_traffic_dict(traffic_dict)
logger.info(
"Registering route '{}' to endpoint '{}' with methods '{}'.".
format(route, endpoint, methods))
self.endpoint_state.create_endpoint(
endpoint, EndpointInfo(methods, route=route),
TrafficPolicy(traffic_dict))
# TODO(simon): Use GoalID mechanism for this so client can check for
# goal id and http_state complete the goal id.
await self.http_state.ensure_http_route_exists(endpoint, timeout_s=30)
async def delete_endpoint(self, endpoint: str) -> None:
"""Delete the specified endpoint.
Does not modify any corresponding backends.
"""
logger.info("Deleting endpoint '{}'".format(endpoint))
async with self.write_lock:
self.endpoint_state.delete_endpoint(endpoint)
async def create_backend(
self, backend_tag: BackendTag, backend_config: BackendConfig,
replica_config: ReplicaConfig) -> Optional[GoalId]:
"""Register a new backend under the specified tag."""
async with self.write_lock:
backend_info = BackendInfo(actor_def=ray.remote(
create_backend_replica(backend_tag,
replica_config.serialized_backend_def)),
version=RESERVED_VERSION_TAG,
backend_config=backend_config,
replica_config=replica_config)
goal_id, _ = self.backend_state.deploy_backend(
backend_tag, backend_info)
return goal_id
async def delete_backend(self,
backend_tag: BackendTag,
force_kill: bool = False) -> Optional[GoalId]:
async with self.write_lock:
# Check that the specified backend isn't used by any endpoints.
for endpoint, info in self.endpoint_state.get_endpoints().items():
if (backend_tag in info["traffic"]
or backend_tag in info["shadows"]):
raise ValueError("Backend '{}' is used by endpoint '{}' "
"and cannot be deleted. Please remove "
"the backend from all endpoints and try "
"again.".format(backend_tag, endpoint))
return self.backend_state.delete_backend(backend_tag, force_kill)
async def update_backend_config(self, backend_tag: BackendTag,
config_options: BackendConfig) -> GoalId:
"""Set the config for the specified backend."""
async with self.write_lock:
existing_info = self.backend_state.get_backend(backend_tag)
if existing_info is None:
raise ValueError(f"Backend {backend_tag} is not registered.")
backend_info = BackendInfo(
actor_def=existing_info.actor_def,
version=existing_info.version,
backend_config=existing_info.backend_config.copy(
update=config_options.dict(exclude_unset=True)),
replica_config=existing_info.replica_config)
goal_id, _ = self.backend_state.deploy_backend(
backend_tag, backend_info)
return goal_id
def get_backend_config(self, backend_tag: BackendTag) -> BackendConfig:
"""Get the current config for the specified backend."""
if self.backend_state.get_backend(backend_tag) is None:
raise ValueError(f"Backend {backend_tag} is not registered.")
return self.backend_state.get_backend(backend_tag).backend_config
def get_http_config(self):
"""Return the HTTP proxy configuration."""
return self.http_state.get_config()
async def shutdown(self) -> None:
"""Shuts down the serve instance completely."""
async with self.write_lock:
self.backend_state.shutdown()
self.endpoint_state.shutdown()
self.http_state.shutdown()
async def deploy(
self, name: str, backend_config: BackendConfig,
replica_config: ReplicaConfig, python_methods: List[str],
version: Optional[str],
route_prefix: Optional[str]) -> Tuple[Optional[GoalId], bool]:
if route_prefix is not None:
assert route_prefix.startswith("/")
async with self.write_lock:
backend_info = BackendInfo(actor_def=ray.remote(
create_backend_replica(name,
replica_config.serialized_backend_def)),
version=version,
backend_config=backend_config,
replica_config=replica_config)
goal_id, updating = self.backend_state.deploy_backend(
name, backend_info)
endpoint_info = EndpointInfo(ALL_HTTP_METHODS,
route=route_prefix,
python_methods=python_methods,
legacy=False)
self.endpoint_state.update_endpoint(name, endpoint_info,
TrafficPolicy({name: 1.0}))
return goal_id, updating
def delete_deployment(self, name: str) -> Optional[GoalId]:
self.endpoint_state.delete_endpoint(name)
return self.backend_state.delete_backend(name, force_kill=False)
def get_deployment_info(self, name: str) -> Tuple[BackendInfo, str]:
"""Get the current information about a deployment.
Args:
name(str): the name of the deployment.
Returns:
(BackendInfo, route)
Raises:
KeyError if the deployment doesn't exist.
"""
backend_info: BackendInfo = self.backend_state.get_backend(name)
if backend_info is None:
raise KeyError(f"Deployment {name} does not exist.")
route = self.endpoint_state.get_endpoint_route(name)
return backend_info, route
def list_deployments(self) -> Dict[str, Tuple[BackendInfo, str]]:
"""Gets the current information about all active deployments."""
return {
name: (self.backend_state.get_backend(name),
self.endpoint_state.get_endpoint_route(name))
for name in self.backend_state.get_backend_configs()
}
class ServeController:
"""Responsible for managing the state of the serving system.
The controller implements fault tolerance by persisting its state in
a new checkpoint each time a state change is made. If the actor crashes,
the latest checkpoint is loaded and the state is recovered. Checkpoints
are written/read using a provided KV-store interface.
All hard state in the system is maintained by this actor and persisted via
these checkpoints. Soft state required by other components is fetched by
those actors from this actor on startup and updates are pushed out from
this actor.
All other actors started by the controller are named, detached actors
so they will not fate share with the controller if it crashes.
The following guarantees are provided for state-changing calls to the
controller:
- If the call succeeds, the change was made and will be reflected in
the system even if the controller or other actors die unexpectedly.
- If the call fails, the change may have been made but isn't guaranteed
to have been. The client should retry in this case. Note that this
requires all implementations here to be idempotent.
"""
async def __init__(self,
controller_name: str,
http_config: HTTPOptions,
detached: bool = False):
# Used to read/write checkpoints.
self.kv_store = RayInternalKVStore(namespace=controller_name)
# Dictionary of backend_tag -> proxy_name -> most recent queue length.
self.backend_stats = defaultdict(lambda: defaultdict(dict))
# Used to ensure that only a single state-changing operation happens
# at any given time.
self.write_lock = asyncio.Lock()
self.long_poll_host = LongPollHost()
self.goal_manager = AsyncGoalManager()
self.http_state = HTTPState(controller_name, detached, http_config)
self.endpoint_state = EndpointState(self.kv_store, self.long_poll_host)
self.backend_state = BackendState(controller_name, detached,
self.kv_store, self.long_poll_host,
self.goal_manager)
asyncio.get_event_loop().create_task(self.run_control_loop())
async def wait_for_goal(self, goal_id: GoalId) -> None:
await self.goal_manager.wait_for_goal(goal_id)
async def _num_pending_goals(self) -> int:
return self.goal_manager.num_pending_goals()
async def listen_for_change(self, keys_to_snapshot_ids: Dict[str, int]):
"""Proxy long pull client's listen request.
Args:
keys_to_snapshot_ids (Dict[str, int]): Snapshot IDs are used to
determine whether or not the host should immediately return the
data or wait for the value to be changed.
"""
return await (
self.long_poll_host.listen_for_change(keys_to_snapshot_ids))
def get_http_proxies(self) -> Dict[NodeId, ActorHandle]:
"""Returns a dictionary of node ID to http_proxy actor handles."""
return self.http_state.get_http_proxy_handles()
async def run_control_loop(self) -> None:
while True:
async with self.write_lock:
self.http_state.update()
self.backend_state.update()
await asyncio.sleep(CONTROL_LOOP_PERIOD_S)
def _all_replica_handles(
self) -> Dict[BackendTag, Dict[ReplicaTag, ActorHandle]]:
"""Used for testing."""
return self.backend_state.get_running_replica_handles()
def get_all_backends(self) -> Dict[BackendTag, BackendConfig]:
"""Returns a dictionary of backend tag to backend config."""
return self.backend_state.get_backend_configs()
def get_all_endpoints(self) -> Dict[EndpointTag, Dict[BackendTag, Any]]:
"""Returns a dictionary of backend tag to backend config."""
return self.endpoint_state.get_endpoints()
def _validate_traffic_dict(self, traffic_dict: Dict[str, float]):
for backend in traffic_dict:
if self.backend_state.get_backend(backend) is None:
raise ValueError(
"Attempted to assign traffic to a backend '{}' that "
"is not registered.".format(backend))
async def set_traffic(self, endpoint: str,
traffic_dict: Dict[str, float]) -> None:
"""Sets the traffic policy for the specified endpoint."""
async with self.write_lock:
self._validate_traffic_dict(traffic_dict)
logger.info("Setting traffic for endpoint "
f"'{endpoint}' to '{traffic_dict}'.")
self.endpoint_state.set_traffic_policy(endpoint,
TrafficPolicy(traffic_dict))
async def shadow_traffic(self, endpoint_name: str, backend_tag: BackendTag,
proportion: float) -> None:
"""Shadow traffic from the endpoint to the backend."""
async with self.write_lock:
if self.backend_state.get_backend(backend_tag) is None:
raise ValueError(
"Attempted to shadow traffic to a backend '{}' that "
"is not registered.".format(backend_tag))
logger.info(
"Shadowing '{}' of traffic to endpoint '{}' to backend '{}'.".
format(proportion, endpoint_name, backend_tag))
self.endpoint_state.shadow_traffic(endpoint_name, backend_tag,
proportion)
async def create_endpoint(
self,
endpoint: str,
traffic_dict: Dict[str, float],
route: Optional[str],
methods: List[str],
) -> None:
"""Create a new endpoint with the specified route and methods.
If the route is None, this is a "headless" endpoint that will not
be exposed over HTTP and can only be accessed via a handle.
"""
async with self.write_lock:
self._validate_traffic_dict(traffic_dict)
logger.info(
"Registering route '{}' to endpoint '{}' with methods '{}'.".
format(route, endpoint, methods))
self.endpoint_state.create_endpoint(endpoint, route, methods,
TrafficPolicy(traffic_dict))
async def delete_endpoint(self, endpoint: str) -> None:
"""Delete the specified endpoint.
Does not modify any corresponding backends.
"""
logger.info("Deleting endpoint '{}'".format(endpoint))
async with self.write_lock:
self.endpoint_state.delete_endpoint(endpoint)
async def create_backend(
self, backend_tag: BackendTag, backend_config: BackendConfig,
replica_config: ReplicaConfig) -> Optional[GoalId]:
"""Register a new backend under the specified tag."""
async with self.write_lock:
backend_info = BackendInfo(
worker_class=create_backend_replica(
replica_config.backend_def),
version=RESERVED_VERSION_TAG,
backend_config=backend_config,
replica_config=replica_config)
return self.backend_state.deploy_backend(backend_tag, backend_info)
async def delete_backend(self,
backend_tag: BackendTag,
force_kill: bool = False) -> Optional[GoalId]:
async with self.write_lock:
# Check that the specified backend isn't used by any endpoints.
for endpoint, info in self.endpoint_state.get_endpoints().items():
if (backend_tag in info["traffic"]
or backend_tag in info["shadows"]):
raise ValueError("Backend '{}' is used by endpoint '{}' "
"and cannot be deleted. Please remove "
"the backend from all endpoints and try "
"again.".format(backend_tag, endpoint))
return self.backend_state.delete_backend(backend_tag, force_kill)
async def update_backend_config(self, backend_tag: BackendTag,
config_options: BackendConfig) -> GoalId:
"""Set the config for the specified backend."""
async with self.write_lock:
existing_info = self.backend_state.get_backend(backend_tag)
if existing_info is None:
raise ValueError(f"Backend {backend_tag} is not registered.")
backend_info = BackendInfo(
worker_class=existing_info.worker_class,
version=existing_info.version,
backend_config=existing_info.backend_config.copy(
update=config_options.dict(exclude_unset=True)),
replica_config=existing_info.replica_config)
return self.backend_state.deploy_backend(backend_tag, backend_info)
def get_backend_config(self, backend_tag: BackendTag) -> BackendConfig:
"""Get the current config for the specified backend."""
if self.backend_state.get_backend(backend_tag) is None:
raise ValueError(f"Backend {backend_tag} is not registered.")
return self.backend_state.get_backend(backend_tag).backend_config
def get_http_config(self):
"""Return the HTTP proxy configuration."""
return self.http_state.get_config()
async def shutdown(self) -> None:
"""Shuts down the serve instance completely."""
async with self.write_lock:
for proxy in self.http_state.get_http_proxy_handles().values():
ray.kill(proxy, no_restart=True)
for replica_dict in self.backend_state.get_running_replica_handles(
).values():
for replica in replica_dict.values():
ray.kill(replica, no_restart=True)
self.kv_store.delete(CHECKPOINT_KEY)
async def deploy(self, name: str, backend_config: BackendConfig,
replica_config: ReplicaConfig,
version: Optional[str]) -> Optional[GoalId]:
# By default the path prefix is the deployment name.
if replica_config.path_prefix is None:
replica_config.path_prefix = f"/{name}"
# Backend config should be synchronized so the backend worker
# is aware of it.
backend_config.internal_metadata.path_prefix = f"/{name}"
if replica_config.is_asgi_app:
# When the backend is asgi application, we want to proxy it
# with a prefixed path as well as proxy all HTTP methods.
# {wildcard:path} is used so HTTPProxy's Starlette router can match
# arbitrary path.
http_route = f"{replica_config.path_prefix}" + "/{wildcard:path}"
# https://developer.mozilla.org/en-US/docs/Web/HTTP/Methods
http_methods = [
"GET", "HEAD", "POST", "PUT", "DELETE", "CONNECT", "OPTIONS",
"TRACE", "PATCH"
]
else:
http_route = replica_config.path_prefix
# Generic endpoint should support a limited subset of HTTP methods.
http_methods = ["GET", "POST"]
python_methods = []
if inspect.isclass(replica_config.backend_def):
for method_name, _ in inspect.getmembers(
replica_config.backend_def, inspect.isfunction):
python_methods.append(method_name)
async with self.write_lock:
backend_info = BackendInfo(
worker_class=create_backend_replica(
replica_config.backend_def),
version=version,
backend_config=backend_config,
replica_config=replica_config)
goal_id = self.backend_state.deploy_backend(name, backend_info)
self.endpoint_state.create_endpoint(
name,
http_route,
http_methods,
TrafficPolicy({
name: 1.0
}),
python_methods=python_methods)
return goal_id
def delete_deployment(self, name: str) -> Optional[GoalId]:
self.endpoint_state.delete_endpoint(name)
return self.backend_state.delete_backend(name, force_kill=False)
def get_deployment_info(self, name: str) -> Tuple[BackendInfo, str]:
"""Get the current information about a deployment.
Args:
name(str): the name of the deployment.
Returns:
(BackendInfo, route)
Raises:
KeyError if the deployment doesn't exist.
"""
backend_info: BackendInfo = self.backend_state.get_backend(name)
if backend_info is None:
raise KeyError(f"Deployment {name} does not exist.")
route = self.endpoint_state.get_endpoint_route(name)
return backend_info, route