Aiohttp-server Instrumentation

CHANGELOG.md

@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased
 
+- `opentelemetry-instrumentation-aiohttp-server` Add instrumentor and auto instrumentation support for aiohttp-server
+  ([#1800](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/1800))
 
 ### Added
 - `opentelemetry-instrumentation-system-metrics` Add support for collecting process metrics
@@ -19,7 +21,6 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - `opentelemetry-resource-detector-azure` Using new Cloud Resource ID attribute.
   ([#1976](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/1976))
 
-
 ## Version 1.20.0/0.41b0 (2023-09-01)
 
 ### Fixed

instrumentation/README.md

@@ -3,6 +3,7 @@
 | --------------- | ------------------ | --------------- |
 | [opentelemetry-instrumentation-aio-pika](./opentelemetry-instrumentation-aio-pika) | aio_pika >= 7.2.0, < 10.0.0 | No
 | [opentelemetry-instrumentation-aiohttp-client](./opentelemetry-instrumentation-aiohttp-client) | aiohttp ~= 3.0 | No
+| [opentelemetry-instrumentation-aiohttp-server](./opentelemetry-instrumentation-aiohttp-server) | aiohttp ~= 3.0 | No
 | [opentelemetry-instrumentation-aiopg](./opentelemetry-instrumentation-aiopg) | aiopg >= 0.13.0, < 2.0.0 | No
 | [opentelemetry-instrumentation-asgi](./opentelemetry-instrumentation-asgi) | asgiref ~= 3.0 | No
 | [opentelemetry-instrumentation-asyncpg](./opentelemetry-instrumentation-asyncpg) | asyncpg >= 0.12.0 | No

instrumentation/opentelemetry-instrumentation-aiohttp-server/README.rst

@@ -0,0 +1,24 @@
+OpenTelemetry aiohttp server Integration
+========================================
+
+|pypi|
+
+.. |pypi| image:: https://badge.fury.io/py/opentelemetry-instrumentation-aiohttp-client.svg
+   :target: https://pypi.org/project/opentelemetry-instrumentation-aiohttp-client/
+
+This library allows tracing HTTP requests made by the
+`aiohttp server <https://docs.aiohttp.org/en/stable/server.html>`_ library.
+
+Installation
+------------
+
+::
+
+     pip install opentelemetry-instrumentation-aiohttp-server
+
+References
+----------
+
+* `OpenTelemetry Project <https://opentelemetry.io/>`_
+* `aiohttp client Tracing <https://docs.aiohttp.org/en/stable/tracing_reference.html>`_
+* `OpenTelemetry Python Examples <https://github.com/open-telemetry/opentelemetry-python/tree/main/docs/examples>`_

instrumentation/opentelemetry-instrumentation-aiohttp-server/pyproject.toml

@@ -0,0 +1,61 @@
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
+
+[project]
+name = "opentelemetry-instrumentation-aiohttp-server"
+dynamic = ["version"]
+description = "Aiohttp server instrumentation for OpenTelemetry"
+readme = "README.rst"
+license = "Apache-2.0"
+requires-python = ">=3.7"
+authors = [
+  { name = "OpenTelemetry Authors", email = "cncf-opentelemetry-contributors@lists.cncf.io"}
+]
+classifiers = [
+    "Development Status :: 4 - Beta",
+    "Intended Audience :: Developers",
+    "License :: OSI Approved :: Apache Software License",
+    "Programming Language :: Python",
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3.7",
+    "Programming Language :: Python :: 3.8",
+    "Programming Language :: Python :: 3.9",
+    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11"
+]
+dependencies = [
+    "opentelemetry-api ~= 1.12",
+    "opentelemetry-instrumentation == 0.42b0.dev",
+    "opentelemetry-semantic-conventions == 0.42b0.dev",
+    "opentelemetry-util-http == 0.42b0.dev",
+    "wrapt >= 1.0.0, < 2.0.0",
+]
+
+[project.optional-dependencies]
+instruments = [
+    "aiohttp ~= 3.0",
+]
+test = [
+  "opentelemetry-instrumentation-aiohttp-server[instruments]",
+  "pytest-asyncio",
+  "pytest-aiohttp",
+]
+
+[project.entry-points.opentelemetry_instrumentor]
+aiohttp-server = "opentelemetry.instrumentation.aiohttp_server:AioHttpServerInstrumentor"
+
+[project.urls]
+Homepage = "https://github.com/open-telemetry/opentelemetry-python-contrib/tree/main/instrumentation/opentelemetry-instrumentation-aiohttp-server"
+
+[tool.hatch.version]
+path = "src/opentelemetry/instrumentation/aiohttp_server/version.py"
+
+[tool.hatch.build.targets.sdist]
+include = [
+  "/src",
+  "/tests",
+]
+
+[tool.hatch.build.targets.wheel]
+packages = ["src/opentelemetry"]

instrumentation/opentelemetry-instrumentation-aiohttp-server/src/opentelemetry/instrumentation/aiohttp_server/__init__.py

@@ -0,0 +1,267 @@
+# Copyright 2020, OpenTelemetry Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import urllib
+from aiohttp import web
+from multidict import CIMultiDictProxy
+from timeit import default_timer
+from typing import Tuple, Dict, List, Union
+
+from opentelemetry import context, trace, metrics
+from opentelemetry.context import _SUPPRESS_HTTP_INSTRUMENTATION_KEY
+from opentelemetry.instrumentation.aiohttp_server.package import _instruments
+from opentelemetry.instrumentation.aiohttp_server.version import __version__
+from opentelemetry.instrumentation.instrumentor import BaseInstrumentor
+from opentelemetry.instrumentation.utils import http_status_to_status_code
+from opentelemetry.propagators.textmap import Getter
+from opentelemetry.propagate import extract
+from opentelemetry.semconv.trace import SpanAttributes
+from opentelemetry.semconv.metrics import MetricInstruments
+from opentelemetry.trace.status import Status, StatusCode
+from opentelemetry.util.http import get_excluded_urls
+from opentelemetry.util.http import remove_url_credentials
+
+_duration_attrs = [
+    SpanAttributes.HTTP_METHOD,
+    SpanAttributes.HTTP_HOST,
+    SpanAttributes.HTTP_SCHEME,
+    SpanAttributes.HTTP_STATUS_CODE,
+    SpanAttributes.HTTP_FLAVOR,
+    SpanAttributes.HTTP_SERVER_NAME,
+    SpanAttributes.NET_HOST_NAME,
+    SpanAttributes.NET_HOST_PORT,
+    SpanAttributes.HTTP_ROUTE,
+]
+
+_active_requests_count_attrs = [
+    SpanAttributes.HTTP_METHOD,
+    SpanAttributes.HTTP_HOST,
+    SpanAttributes.HTTP_SCHEME,
+    SpanAttributes.HTTP_FLAVOR,
+    SpanAttributes.HTTP_SERVER_NAME,
+]
+
+tracer = trace.get_tracer(__name__)
+meter = metrics.get_meter(__name__, __version__)
+_excluded_urls = get_excluded_urls("AIOHTTP_SERVER")
+
+
+def _parse_duration_attrs(req_attrs):
+    duration_attrs = {}
+    for attr_key in _duration_attrs:
+        if req_attrs.get(attr_key) is not None:
+            duration_attrs[attr_key] = req_attrs[attr_key]
+    return duration_attrs
+
+
+def _parse_active_request_count_attrs(req_attrs):
+    active_requests_count_attrs = {}
+    for attr_key in _active_requests_count_attrs:
+        if req_attrs.get(attr_key) is not None:
+            active_requests_count_attrs[attr_key] = req_attrs[attr_key]
+    return active_requests_count_attrs
+
+
+def get_default_span_details(request: web.Request) -> Tuple[str, dict]:
+    """Default implementation for get_default_span_details
+    Args:
+        request: the request object itself.
+    Returns:
+        a tuple of the span name, and any attributes to attach to the span.
+    """
+    span_name = request.path.strip() or f"HTTP {request.method}"
+    return span_name, {}
+
+
+def _get_view_func(request: web.Request) -> str:
+    """Returns the name of the request handler.
+    Args:
+        request: the request object itself.
+    Returns:
+        a string containing the name of the handler function
+    """
+    try:
+        return request.match_info.handler.__name__
+    except AttributeError:
+        return "unknown"
+
+
+def collect_request_attributes(request: web.Request) -> Dict:
+    """Collects HTTP request attributes from the ASGI scope and returns a
+    dictionary to be used as span creation attributes."""
+
+    server_host, port, http_url = (
+        request.url.host,
+        request.url.port,
+        str(request.url),
+    )
+    query_string = request.query_string
+    if query_string and http_url:
+        if isinstance(query_string, bytes):
+            query_string = query_string.decode("utf8")
+        http_url += "?" + urllib.parse.unquote(query_string)
+
+    result = {
+        SpanAttributes.HTTP_SCHEME: request.scheme,
+        SpanAttributes.HTTP_HOST: server_host,
+        SpanAttributes.NET_HOST_PORT: port,
+        SpanAttributes.HTTP_ROUTE: _get_view_func(request),
+        SpanAttributes.HTTP_FLAVOR: f"{request.version.major}.{request.version.minor}",
+        SpanAttributes.HTTP_TARGET: request.path,
+        SpanAttributes.HTTP_URL: remove_url_credentials(http_url),
+    }
+
+    http_method = request.method
+    if http_method:
+        result[SpanAttributes.HTTP_METHOD] = http_method
+
+    http_host_value_list = (
+        [request.host] if type(request.host) != list else request.host
+    )
+    if http_host_value_list:
+        result[SpanAttributes.HTTP_SERVER_NAME] = ",".join(
+            http_host_value_list
+        )
+    http_user_agent = request.headers.get("user-agent")
+    if http_user_agent:
+        result[SpanAttributes.HTTP_USER_AGENT] = http_user_agent
+
+    # remove None values
+    result = {k: v for k, v in result.items() if v is not None}
+
+    return result
+
+
+def set_status_code(span, status_code: int) -> None:
+    """Adds HTTP response attributes to span using the status_code argument."""
+
+    try:
+        status_code = int(status_code)
+    except ValueError:
+        span.set_status(
+            Status(
+                StatusCode.ERROR,
+                "Non-integer HTTP status: " + repr(status_code),
+            )
+        )
+    else:
+        span.set_attribute(SpanAttributes.HTTP_STATUS_CODE, status_code)
+        span.set_status(
+            Status(http_status_to_status_code(status_code, server_span=True))
+        )
+
+
+class AiohttpGetter(Getter):
+    """Extract current trace from headers"""
+
+    def get(self, carrier, key: str) -> Union[List, None]:
+        """Getter implementation to retrieve an HTTP header value from the ASGI
+        scope.
+
+        Args:
+            carrier: ASGI scope object
+            key: header name in scope
+        Returns:
+            A list of all header values matching the key, or None if the key
+            does not match any header.
+        """
+        headers: CIMultiDictProxy = carrier.headers
+        if not headers:
+            return None
+        return headers.getall(key, None)
+
+    def keys(self, carrier: Dict) -> List:
+        return list(carrier.keys())
+
+
+getter = AiohttpGetter()
+
+
+@web.middleware
+async def middleware(request, handler):
+    """Middleware for aiohttp implementing tracing logic"""
+    if (
+        context.get_value("suppress_instrumentation")
+        or context.get_value(_SUPPRESS_HTTP_INSTRUMENTATION_KEY)
+        or _excluded_urls.url_disabled(request.url.path)
+    ):
+        return await handler(request)
+
+    span_name, additional_attributes = get_default_span_details(request)
+
+    req_attrs = collect_request_attributes(request)
+    duration_attrs = _parse_duration_attrs(req_attrs)
+    active_requests_count_attrs = _parse_active_request_count_attrs(req_attrs)
+
+    duration_histogram = meter.create_histogram(
+        name=MetricInstruments.HTTP_SERVER_DURATION,
+        unit="ms",
+        description="measures the duration of the inbound HTTP request",
+    )
+
+    active_requests_counter = meter.create_up_down_counter(
+        name=MetricInstruments.HTTP_SERVER_ACTIVE_REQUESTS,
+        unit="requests",
+        description="measures the number of concurrent HTTP requests those are currently in flight",
+    )
+
+    with tracer.start_as_current_span(
+        span_name,
+        context=extract(request, getter=getter),
+        kind=trace.SpanKind.SERVER,
+    ) as span:
+        attributes = collect_request_attributes(request)
+        attributes.update(additional_attributes)
+        span.set_attributes(attributes)
+        start = default_timer()
+        active_requests_counter.add(1, active_requests_count_attrs)
+        try:
+            resp = await handler(request)
+            set_status_code(span, resp.status)
+        except web.HTTPException as ex:
+            set_status_code(span, ex.status_code)
+            raise
+        finally:
+            duration = max((default_timer() - start) * 1000, 0)
+            duration_histogram.record(duration, duration_attrs)
+            active_requests_counter.add(-1, active_requests_count_attrs)
+        return resp
+
+
+class _InstrumentedApplication(web.Application):
+    """Insert tracing middleware"""
+
+    def __init__(self, *args, **kwargs):
+        middlewares = kwargs.pop("middlewares", [])
+        middlewares.insert(0, middleware)
+        kwargs["middlewares"] = middlewares
+        super().__init__(*args, **kwargs)
+
+
+class AioHttpServerInstrumentor(BaseInstrumentor):
+    # pylint: disable=protected-access,attribute-defined-outside-init
+    """An instrumentor for aiohttp.web.Application
+
+    See `BaseInstrumentor`
+    """
+
+    def _instrument(self, **kwargs):
+        self._original_app = web.Application
+        setattr(web, "Application", _InstrumentedApplication)
+
+    def _uninstrument(self, **kwargs):
+        setattr(web, "Application", self._original_app)
+
+    def instrumentation_dependencies(self):
+        return _instruments

instrumentation/opentelemetry-instrumentation-aiohttp-server/src/opentelemetry/instrumentation/aiohttp_server/package.py

@@ -0,0 +1,16 @@
+# Copyright The OpenTelemetry Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
+_instruments = ("aiohttp ~= 3.0",)