feat(major): move new telemetry architecture into new provider

llama_stack/core/server/server.py

@@ -62,18 +62,10 @@ from llama_stack.core.utils.config_resolution import Mode, resolve_config_or_dis
 from llama_stack.core.utils.context import preserve_contexts_async_generator
 from llama_stack.log import get_logger
 from llama_stack.providers.datatypes import Api
-from llama_stack.providers.inline.telemetry.meta_reference.config import TelemetryConfig
-from llama_stack.providers.inline.telemetry.meta_reference.telemetry import (
-    TelemetryAdapter,
-)
-from llama_stack.providers.utils.telemetry.tracing import (
-    CURRENT_TRACE_CONTEXT,
-    setup_logger,
-)
+
 
 from .auth import AuthenticationMiddleware
 from .quota import QuotaMiddleware
-from .tracing import TracingMiddleware
 
 REPO_ROOT = Path(__file__).parent.parent.parent.parent
 
@@ -243,7 +235,7 @@ def create_dynamic_typed_route(func: Any, method: str, route: str) -> Callable:
             try:
                 if is_streaming:
                     gen = preserve_contexts_async_generator(
-                        sse_generator(func(**kwargs)), [CURRENT_TRACE_CONTEXT, PROVIDER_DATA_VAR]
+                        sse_generator(func(**kwargs)), [PROVIDER_DATA_VAR]
                     )
                     return StreamingResponse(gen, media_type="text/event-stream")
                 else:
@@ -288,8 +280,7 @@ def create_dynamic_typed_route(func: Any, method: str, route: str) -> Callable:
             ]
         )
 
-    route_handler.__signature__ = sig.replace(parameters=new_params)
-
+    setattr(route_handler, "__signature__", sig.replace(parameters=new_params))
     return route_handler
 
 
@@ -351,11 +342,12 @@ def create_app(
     if config_file is None:
         raise ValueError("No config file provided and LLAMA_STACK_CONFIG env var is not set")
 
-    config_file = resolve_config_or_distro(config_file, Mode.RUN)
+    config_path = resolve_config_or_distro(config_file, Mode.RUN)
 
     # Load and process configuration
     logger_config = None
-    with open(config_file) as fp:
+
+    with open(config_path) as fp:
         config_contents = yaml.safe_load(fp)
         if isinstance(config_contents, dict) and (cfg := config_contents.get("logging_config")):
             logger_config = LoggingConfig(**cfg)
@@ -387,7 +379,7 @@ def create_app(
     if not os.environ.get("LLAMA_STACK_DISABLE_VERSION_CHECK"):
         app.add_middleware(ClientVersionMiddleware)
 
-    impls = app.stack.impls
+    impls = app.stack.get_impls()
 
     if config.server.auth:
         logger.info(f"Enabling authentication with provider: {config.server.auth.provider_config.type.value}")
@@ -429,11 +421,7 @@ def create_app(
             app.add_middleware(CORSMiddleware, **cors_config.model_dump())
 
     if Api.telemetry in impls:
-        setup_logger(impls[Api.telemetry])
-        if impls[Api.telemetry].fastapi_middleware:
-            impls[Api.telemetry].fastapi_middleware(app)
-    else:
-        setup_logger(TelemetryAdapter(TelemetryConfig(), {}))
+        impls[Api.telemetry].fastapi_middleware(app)
 
     # Load external APIs if configured
     external_apis = load_external_apis(config)
@@ -442,7 +430,7 @@ def create_app(
     if config.apis:
         apis_to_serve = set(config.apis)
     else:
-        apis_to_serve = set(impls.keys())
+        apis_to_serve = {api.value for api in impls.keys()}
 
     for inf in builtin_automatically_routed_apis():
         # if we do not serve the corresponding router API, we should not serve the routing table API
@@ -470,7 +458,8 @@ def create_app(
 
             impl_method = getattr(impl, route.name)
             # Filter out HEAD method since it's automatically handled by FastAPI for GET routes
-            available_methods = [m for m in route.methods if m != "HEAD"]
+            route_methods = route.methods or []
+            available_methods = [m for m in route_methods if m != "HEAD"]
             if not available_methods:
                 raise ValueError(f"No methods found for {route.name} on {impl}")
             method = available_methods[0]
@@ -491,8 +480,6 @@ def create_app(
     app.exception_handler(RequestValidationError)(global_exception_handler)
     app.exception_handler(Exception)(global_exception_handler)
 
-    app.add_middleware(TracingMiddleware, impls=impls, external_apis=external_apis)
-
     return app
 
 
@@ -530,8 +517,8 @@ def main(args: argparse.Namespace | None = None):
         logger.error(f"Error creating app: {str(e)}")
         sys.exit(1)
 
-    config_file = resolve_config_or_distro(config_or_distro, Mode.RUN)
-    with open(config_file) as fp:
+    config_path = resolve_config_or_distro(config_or_distro, Mode.RUN)
+    with open(config_path) as fp:
         config_contents = yaml.safe_load(fp)
         if isinstance(config_contents, dict) and (cfg := config_contents.get("logging_config")):
             logger_config = LoggingConfig(**cfg)

llama_stack/core/stack.py

@@ -359,6 +359,13 @@ class Stack:
         await refresh_registry_once(impls)
         self.impls = impls
 
+
+    # safely access impls without raising an exception
+    def get_impls(self) -> dict[Api, Any]:
+        if self.impls is None:
+            return {}
+        return self.impls
+
     def create_registry_refresh_task(self):
         assert self.impls is not None, "Must call initialize() before starting"
 

llama_stack/core/telemetry/__init__.py

@@ -0,0 +1,4 @@
+# All rights reserved.
+#
+# This source code is licensed under the terms described in the LICENSE file in
+# the root directory of this source tree.

llama_stack/core/telemetry/tracing.py

@@ -0,0 +1,20 @@
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+# All rights reserved.
+#
+# This source code is licensed under the terms described in the LICENSE file in
+# the root directory of this source tree.
+from abc import abstractmethod
+from fastapi import FastAPI
+from pydantic import BaseModel
+
+
+class TelemetryProvider(BaseModel):
+    """
+    TelemetryProvider standardizes how telemetry is provided to the application.
+    """
+    @abstractmethod
+    def fastapi_middleware(self, app: FastAPI, *args, **kwargs):
+        """
+        Injects FastAPI middleware that instruments the application for telemetry.
+        """
+        ...

llama_stack/providers/inline/telemetry/meta_reference/middleware.py

@@ -1,20 +1,22 @@
-# Copyright (c) Meta Platforms, Inc. and affiliates.
-# All rights reserved.
-#
-# This source code is licensed under the terms described in the LICENSE file in
-# the root directory of this source tree.
 from aiohttp import hdrs
+from typing import Any
 
+from llama_stack.apis.datatypes import Api
 from llama_stack.core.external import ExternalApiSpec
 from llama_stack.core.server.routes import find_matching_route, initialize_route_impls
 from llama_stack.log import get_logger
 from llama_stack.providers.utils.telemetry.tracing import end_trace, start_trace
 
-logger = get_logger(name=__name__, category="core::server")
 
+logger = get_logger(name=__name__, category="telemetry::meta_reference")
 
 class TracingMiddleware:
-    def __init__(self, app, impls, external_apis: dict[str, ExternalApiSpec]):
+    def __init__(
+        self,
+        app,
+        impls: dict[Api, Any],
+        external_apis: dict[str, ExternalApiSpec],
+    ):
         self.app = app
         self.impls = impls
         self.external_apis = external_apis
@@ -34,7 +36,8 @@ class TracingMiddleware:
             return await self.app(scope, receive, send)
 
         if not hasattr(self, "route_impls"):
-            self.route_impls = initialize_route_impls(self.impls, self.external_apis)
+            external_api_map = {Api(api_name): spec for api_name, spec in self.external_apis.items()}
+            self.route_impls = initialize_route_impls(self.impls, external_api_map)
 
         try:
             _, _, route_path, webmethod = find_matching_route(

llama_stack/providers/inline/telemetry/meta_reference/telemetry.py

@@ -7,8 +7,7 @@
 import datetime
 import os
 import threading
-import logging
-from typing import Any
+from typing import Any, cast
 
 from fastapi import FastAPI
 
@@ -22,7 +21,12 @@ from opentelemetry.sdk.trace import TracerProvider
 from opentelemetry.sdk.trace.export import BatchSpanProcessor
 from opentelemetry.semconv.attributes import service_attributes
 from opentelemetry.trace.propagation.tracecontext import TraceContextTextMapPropagator
-from opentelemetry.instrumentation.fastapi import FastAPIInstrumentor
+from opentelemetry.util.types import Attributes
+
+from llama_stack.core.external import ExternalApiSpec
+from llama_stack.core.server.tracing import TelemetryProvider
+from llama_stack.providers.inline.telemetry.meta_reference.middleware import TracingMiddleware
+
 
 from llama_stack.apis.telemetry import (
     Event,
@@ -73,7 +77,7 @@ def is_tracing_enabled(tracer):
         return span.is_recording()
 
 
-class TelemetryAdapter(TelemetryDatasetMixin, Telemetry):
+class TelemetryAdapter(TelemetryDatasetMixin, Telemetry, TelemetryProvider):
     def __init__(self, config: TelemetryConfig, deps: dict[Api, Any]) -> None:
         self.config = config
         self.datasetio_api = deps.get(Api.datasetio)
@@ -266,12 +270,13 @@ class TelemetryAdapter(TelemetryDatasetMixin, Telemetry):
         # Log to OpenTelemetry meter if available
         if self.meter is None:
             return
+        normalized_attributes = self._normalize_attributes(event.attributes)
         if isinstance(event.value, int):
             counter = self._get_or_create_counter(event.metric, event.unit)
-            counter.add(event.value, attributes=event.attributes)
+            counter.add(event.value, attributes=normalized_attributes)
         elif isinstance(event.value, float):
             up_down_counter = self._get_or_create_up_down_counter(event.metric, event.unit)
-            up_down_counter.add(event.value, attributes=event.attributes)
+            up_down_counter.add(event.value, attributes=normalized_attributes)
 
     def _get_or_create_up_down_counter(self, name: str, unit: str) -> metrics.UpDownCounter:
         assert self.meter is not None
@@ -287,18 +292,17 @@ class TelemetryAdapter(TelemetryDatasetMixin, Telemetry):
         with self._lock:
             span_id = int(event.span_id, 16)
             tracer = trace.get_tracer(__name__)
-            if event.attributes is None:
-                event.attributes = {}
-            event.attributes["__ttl__"] = ttl_seconds
+            event_attributes = dict(event.attributes or {})
+            event_attributes["__ttl__"] = ttl_seconds
 
             # Extract these W3C trace context attributes so they are not written to
             # underlying storage, as we just need them to propagate the trace context.
-            traceparent = event.attributes.pop("traceparent", None)
-            tracestate = event.attributes.pop("tracestate", None)
+            traceparent = event_attributes.pop("traceparent", None)
+            tracestate = event_attributes.pop("tracestate", None)
             if traceparent:
                 # If we have a traceparent header value, we're not the root span.
                 for root_attribute in ROOT_SPAN_MARKERS:
-                    event.attributes.pop(root_attribute, None)
+                    event_attributes.pop(root_attribute, None)
 
             if isinstance(event.payload, SpanStartPayload):
                 # Check if span already exists to prevent duplicates
@@ -309,7 +313,8 @@ class TelemetryAdapter(TelemetryDatasetMixin, Telemetry):
                 if event.payload.parent_span_id:
                     parent_span_id = int(event.payload.parent_span_id, 16)
                     parent_span = _GLOBAL_STORAGE["active_spans"].get(parent_span_id)
-                    context = trace.set_span_in_context(parent_span)
+                    if parent_span:
+                        context = trace.set_span_in_context(parent_span)
                 elif traceparent:
                     carrier = {
                         "traceparent": traceparent,
@@ -320,15 +325,15 @@ class TelemetryAdapter(TelemetryDatasetMixin, Telemetry):
                 span = tracer.start_span(
                     name=event.payload.name,
                     context=context,
-                    attributes=event.attributes or {},
+                    attributes=self._normalize_attributes(event_attributes),
                 )
                 _GLOBAL_STORAGE["active_spans"][span_id] = span
 
             elif isinstance(event.payload, SpanEndPayload):
                 span = _GLOBAL_STORAGE["active_spans"].get(span_id)
                 if span:
-                    if event.attributes:
-                        span.set_attributes(event.attributes)
+                    if event_attributes:
+                        span.set_attributes(self._normalize_attributes(event_attributes))
 
                     status = (
                         trace.Status(status_code=trace.StatusCode.OK)
@@ -377,5 +382,14 @@ class TelemetryAdapter(TelemetryDatasetMixin, Telemetry):
             )
         )
     
-    def fastapi_middleware(self, app: FastAPI) -> None:
-        FastAPIInstrumentor.instrument_app(app)
+    def fastapi_middleware(
+        self,
+        app: FastAPI,
+        impls: dict[Api, Any],
+        external_apis: dict[str, ExternalApiSpec],
+    ):
+        TracingMiddleware(app, impls, external_apis)
+
+    @staticmethod
+    def _normalize_attributes(attributes: dict[str, Any] | None) -> Attributes:
+        return cast(Attributes, dict(attributes) if attributes else {})

llama_stack/providers/inline/telemetry/otel/README.md

@@ -0,0 +1,26 @@
+# Open Telemetry Native Instrumentation
+
+This instrumentation package is simple, and follows expected open telemetry standards. It injects middleware for distributed tracing into all ingress and egress points into the application, and can be tuned and configured with OTEL environment variables.
+
+## Set Up
+
+First, bootstrap and install all necessary libraries for open telemtry:
+
+```
+uv run opentelemetry-bootstrap -a requirements | uv pip install --requirement -
+```
+
+Then, run with automatic code injection:
+
+```
+uv run opentelemetry-instrument llama stack run --config myconfig.yaml
+```
+
+### Excluded Fast API URLs
+
+```
+export OTEL_PYTHON_FASTAPI_EXCLUDED_URLS="client/.*/info,healthcheck"
+```
+
+#### Environment Variables
+Environment Variables: https://opentelemetry.io/docs/specs/otel/configuration/sdk-environment-variables/

llama_stack/providers/inline/telemetry/otel/config.py

@@ -0,0 +1,31 @@
+from typing import Literal
+
+from pydantic import BaseModel, Field
+
+
+type BatchSpanProcessor = Literal["batch"]
+type SimpleSpanProcessor = Literal["simple"]
+
+class OTelTelemetryConfig(BaseModel):
+    """
+    The configuration for the OpenTelemetry telemetry provider.
+    Most configuration is set using environment variables.
+    See https://opentelemetry.io/docs/specs/otel/configuration/sdk-environment-variables/ for more information.
+    """
+    service_name: str = Field(
+        description="""The name of the service to be monitored. 
+        Is overridden by the OTEL_SERVICE_NAME or OTEL_RESOURCE_ATTRIBUTES environment variables.""",
+    )
+    service_version: str | None = Field(
+        description="""The version of the service to be monitored. 
+        Is overriden by the OTEL_RESOURCE_ATTRIBUTES environment variable."""
+    )
+    deployment_environment: str | None = Field(
+        description="""The name of the environment of the service to be monitored. 
+        Is overriden by the OTEL_RESOURCE_ATTRIBUTES environment variable."""
+    )
+    span_processor: BatchSpanProcessor | SimpleSpanProcessor | None = Field(
+        description="""The span processor to use. 
+        Is overriden by the OTEL_SPAN_PROCESSOR environment variable.""",
+        default="batch"
+    )

llama_stack/providers/inline/telemetry/otel/otel.py

@@ -0,0 +1,63 @@
+import os
+
+from opentelemetry import trace, metrics
+from opentelemetry.sdk.resources import Attributes, Resource
+from opentelemetry.sdk.trace import TracerProvider
+from opentelemetry.sdk.trace.export import BatchSpanProcessor, SimpleSpanProcessor
+from opentelemetry.exporter.otlp.proto.http.trace_exporter import OTLPSpanExporter
+from opentelemetry.sdk.metrics import MeterProvider
+from opentelemetry.instrumentation.fastapi import FastAPIInstrumentor
+
+from llama_stack.core.telemetry.tracing import TelemetryProvider
+from llama_stack.log import get_logger
+
+from .config import OTelTelemetryConfig
+from fastapi import FastAPI
+
+
+logger = get_logger(name=__name__, category="telemetry::otel")
+
+
+class OTelTelemetryProvider(TelemetryProvider):
+    """
+    A simple Open Telemetry native telemetry provider.
+    """
+    def __init__(self, config: OTelTelemetryConfig):
+        self.config = config
+        attributes: Attributes = {
+            key: value
+            for key, value in {
+                "service.name": self.config.service_name,
+                "service.version": self.config.service_version,
+                "deployment.environment": self.config.deployment_environment,
+            }.items()
+            if value is not None
+        }
+
+        resource = Resource.create(attributes)
+
+        # Configure the tracer provider
+        tracer_provider = TracerProvider(resource=resource)
+        trace.set_tracer_provider(tracer_provider)
+
+        otlp_span_exporter = OTLPSpanExporter()
+
+        # Configure the span processor
+        # Enable batching of spans to reduce the number of requests to the collector
+        if self.config.span_processor == "batch":
+            tracer_provider.add_span_processor(BatchSpanProcessor(otlp_span_exporter))
+        elif self.config.span_processor == "simple":
+            tracer_provider.add_span_processor(SimpleSpanProcessor(otlp_span_exporter))
+        
+        meter_provider = MeterProvider(resource=resource)
+        metrics.set_meter_provider(meter_provider)
+
+        # Do not fail the application, but warn the user if the endpoints are not set properly
+        if not os.environ.get("OTEL_EXPORTER_OTLP_ENDPOINT"):
+            if not os.environ.get("OTEL_EXPORTER_OTLP_TRACES_ENDPOINT"):
+                logger.warning("OTEL_EXPORTER_OTLP_ENDPOINT or OTEL_EXPORTER_OTLP_TRACES_ENDPOINT is not set. Traces will not be exported.")
+            if not os.environ.get("OTEL_EXPORTER_OTLP_METRICS_ENDPOINT"):
+                logger.warning("OTEL_EXPORTER_OTLP_ENDPOINT or OTEL_EXPORTER_OTLP_METRICS_ENDPOINT is not set. Metrics will not be exported.")
+
+    def fastapi_middleware(self, app: FastAPI):
+        FastAPIInstrumentor.instrument_app(app)