pydantic · alexmojaki · Jun 5, 2025 · Jun 4, 2025 · Jun 5, 2025 · Jun 5, 2025
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
@@ -64,8 +64,6 @@ jobs:
         python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
         pydantic-version: ['2.11']
         include:
-            - python-version: '3.8'
-              pydantic-version: '2.10'
             - python-version: '3.12'
               pydantic-version: '2.4'
     env:

diff --git a/logfire/_internal/config.py b/logfire/_internal/config.py
@@ -53,7 +53,6 @@
 from opentelemetry.sdk.trace.export import BatchSpanProcessor, SimpleSpanProcessor
 from opentelemetry.sdk.trace.id_generator import IdGenerator
 from opentelemetry.sdk.trace.sampling import ParentBasedTraceIdRatio, Sampler
-from opentelemetry.semconv.resource import ResourceAttributes
 from rich.console import Console
 from rich.prompt import Confirm, IntPrompt, Prompt
 from typing_extensions import Self, Unpack
@@ -574,10 +573,6 @@ def _load_configuration(
         self.inspect_arguments = param_manager.load_param('inspect_arguments', inspect_arguments)
         self.distributed_tracing = param_manager.load_param('distributed_tracing', distributed_tracing)
         self.ignore_no_config = param_manager.load_param('ignore_no_config')
-        if self.inspect_arguments and sys.version_info[:2] <= (3, 8):
-            raise LogfireConfigError(
-                'Inspecting arguments is only supported in Python 3.9+ and only recommended in Python 3.11+.'
-            )
 
         # We save `scrubbing` just so that it can be serialized and deserialized.
         if isinstance(scrubbing, dict):
@@ -765,12 +760,12 @@ def _initialize(self) -> None:
 
         with suppress_instrumentation():
             otel_resource_attributes: dict[str, Any] = {
-                ResourceAttributes.SERVICE_NAME: self.service_name,
-                ResourceAttributes.PROCESS_PID: os.getpid(),
+                'service.name': self.service_name,
+                'process.pid': os.getpid(),
                 # https://opentelemetry.io/docs/specs/semconv/resource/process/#python-runtimes
-                ResourceAttributes.PROCESS_RUNTIME_NAME: sys.implementation.name,
-                ResourceAttributes.PROCESS_RUNTIME_VERSION: get_runtime_version(),
-                ResourceAttributes.PROCESS_RUNTIME_DESCRIPTION: sys.version,
+                'process.runtime.name': sys.implementation.name,
+                'process.runtime.version': get_runtime_version(),
+                'process.runtime.description': sys.version,
                 # Having this giant blob of data associated with every span/metric causes various problems so it's
                 # disabled for now, but we may want to re-enable something like it in the future
                 # RESOURCE_ATTRIBUTES_PACKAGE_VERSIONS: json.dumps(collect_package_info(), separators=(',', ':')),
@@ -785,7 +780,7 @@ def _initialize(self) -> None:
                 if self.code_source.root_path:
                     otel_resource_attributes[RESOURCE_ATTRIBUTES_CODE_ROOT_PATH] = self.code_source.root_path
             if self.service_version:
-                otel_resource_attributes[ResourceAttributes.SERVICE_VERSION] = self.service_version
+                otel_resource_attributes['service.version'] = self.service_version
             if self.environment:
                 otel_resource_attributes[RESOURCE_ATTRIBUTES_DEPLOYMENT_ENVIRONMENT_NAME] = self.environment
             otel_resource_attributes_from_env = os.getenv(OTEL_RESOURCE_ATTRIBUTES)
@@ -813,7 +808,7 @@ def _initialize(self) -> None:
             # Currently there's a newer version with some differences here:
             # https://github.com/open-telemetry/semantic-conventions/blob/e44693245eef815071402b88c3a44a8f7f8f24c8/docs/resource/README.md#service-experimental
             # Both recommend generating a UUID.
-            resource = Resource({ResourceAttributes.SERVICE_INSTANCE_ID: uuid4().hex}).merge(resource)
+            resource = Resource({'service.instance.id': uuid4().hex}).merge(resource)
 
             head = self.sampling.head
             sampler: Sampler | None = None
@@ -843,12 +838,8 @@ def _initialize(self) -> None:
 
             def add_span_processor(span_processor: SpanProcessor) -> None:
                 main_multiprocessor.add_span_processor(span_processor)
-                inner_span_processor = span_processor
-                while isinstance(p := getattr(inner_span_processor, 'processor', None), SpanProcessor):
-                    inner_span_processor = p
-
                 has_pending = isinstance(
-                    getattr(inner_span_processor, 'span_exporter', None),
+                    getattr(span_processor, 'span_exporter', None),
                     (TestExporter, RemovePendingSpansExporter, SimpleConsoleSpanExporter),
                 )
                 if has_pending:
@@ -1038,7 +1029,7 @@ def check_token():
 
                 def fix_pid():  # pragma: no cover
                     with handle_internal_errors:
-                        new_resource = resource.merge(Resource({ResourceAttributes.PROCESS_PID: os.getpid()}))
+                        new_resource = resource.merge(Resource({'process.pid': os.getpid()}))
                         tracer_provider._resource = new_resource  # type: ignore
                         meter_provider._resource = new_resource  # type: ignore
                         logger_provider._resource = new_resource  # type: ignore

diff --git a/logfire/_internal/db_statement_summary.py b/logfire/_internal/db_statement_summary.py
@@ -3,8 +3,6 @@
 import re
 from typing import Any, Mapping
 
-from opentelemetry.semconv.trace import SpanAttributes
-
 MAX_QUERY_MESSAGE_LENGTH = 80
 
 
@@ -13,7 +11,7 @@ def message_from_db_statement(attributes: Mapping[str, Any], message: str | None
 
     Returns: A new string to use as span message or None to keep the original message.
     """
-    db_statement = attributes.get(SpanAttributes.DB_STATEMENT)
+    db_statement = attributes.get('db.statement')
     if not isinstance(db_statement, str):
         # covers `None` and anything any other unexpected type
         return None
@@ -25,7 +23,7 @@ def message_from_db_statement(attributes: Mapping[str, Any], message: str | None
 
     db_statement = db_statement.strip()
     if isinstance(message, str):
-        db_name = attributes.get(SpanAttributes.DB_NAME)
+        db_name = attributes.get('db.name')
         if db_name and isinstance(db_name, str) and message.endswith(db_name):
             operation = message[: -len(db_name) - 1]
         else:

diff --git a/logfire/_internal/exporters/dynamic_batch.py b/logfire/_internal/exporters/dynamic_batch.py
@@ -1,14 +1,17 @@
 from __future__ import annotations
 
 import os
-from typing import cast
+from typing import TYPE_CHECKING
 
 from opentelemetry.sdk.environment_variables import OTEL_BSP_SCHEDULE_DELAY
-from opentelemetry.sdk.trace import ReadableSpan
+from opentelemetry.sdk.trace import ReadableSpan, Span
 from opentelemetry.sdk.trace.export import BatchSpanProcessor, SpanExporter
 
 from logfire._internal.exporters.wrapper import WrapperSpanProcessor
 
+if TYPE_CHECKING:
+    from opentelemetry.sdk._shared_internal import BatchProcessor
+
 
 class DynamicBatchSpanProcessor(WrapperSpanProcessor):
     """A wrapper around a BatchSpanProcessor that dynamically adjusts the schedule delay.
@@ -18,6 +21,8 @@ class DynamicBatchSpanProcessor(WrapperSpanProcessor):
     This makes the initial experience of the SDK more responsive.
     """
 
+    processor: BatchSpanProcessor  # type: ignore
+
     def __init__(self, exporter: SpanExporter) -> None:
         self.final_delay = float(os.environ.get(OTEL_BSP_SCHEDULE_DELAY) or 500)
         # Start with the configured value immediately if it's less than 100ms.
@@ -28,5 +33,19 @@ def __init__(self, exporter: SpanExporter) -> None:
     def on_end(self, span: ReadableSpan) -> None:
         self.num_processed += 1
         if self.num_processed == 10:
-            cast(BatchSpanProcessor, self.processor).schedule_delay_millis = self.final_delay
+            if hasattr(self.batch_processor, '_schedule_delay_millis'):
+                self.batch_processor._schedule_delay = self.final_delay / 1e3  # type: ignore
+            else:  # pragma: no cover
+                self.processor.schedule_delay_millis = self.final_delay  # type: ignore
         super().on_end(span)
+
+    @property
+    def batch_processor(self) -> BatchSpanProcessor | BatchProcessor[Span]:
+        return getattr(self.processor, '_batch_processor', self.processor)
+
+    @property
+    def span_exporter(self) -> SpanExporter:
+        if isinstance(self.batch_processor, BatchSpanProcessor):  # pragma: no cover
+            return self.batch_processor.span_exporter  # type: ignore
+        else:
+            return self.batch_processor._exporter  # type: ignore
diff --git a/logfire/_internal/exporters/processor_wrapper.py b/logfire/_internal/exporters/processor_wrapper.py
@@ -9,7 +9,6 @@
 from opentelemetry import context
 from opentelemetry.sdk.trace import ReadableSpan, Span
 from opentelemetry.sdk.util.instrumentation import InstrumentationScope
-from opentelemetry.semconv.trace import SpanAttributes
 from opentelemetry.trace import SpanKind, Status, StatusCode
 
 import logfire
@@ -121,7 +120,7 @@ def _tweak_sqlalchemy_connect_spans(span: ReadableSpanDict) -> None:
     attributes = span['attributes']
     # We never expect db.statement to be in the attributes here.
     # This is just to be extra sure that we're not accidentally hiding an actual query span.
-    if SpanAttributes.DB_SYSTEM not in attributes or SpanAttributes.DB_STATEMENT in attributes:  # pragma: no cover
+    if 'db.system' not in attributes or 'db.statement' in attributes:  # pragma: no cover
         return
     span['attributes'] = {**attributes, **log_level_attributes('debug')}
 
@@ -196,17 +195,17 @@ def _tweak_http_spans(span: ReadableSpanDict):
     if name != attributes.get(ATTRIBUTES_MESSAGE_KEY):  # pragma: no cover
         return
 
-    method = attributes.get(SpanAttributes.HTTP_METHOD)
-    route = attributes.get(SpanAttributes.HTTP_ROUTE)
-    target = attributes.get(SpanAttributes.HTTP_TARGET)
-    url: Any = attributes.get(SpanAttributes.HTTP_URL)
+    method = attributes.get('http.method')
+    route = attributes.get('http.route')
+    target = attributes.get('http.target')
+    url: Any = attributes.get('http.url')
     if not (method or route or target or url):
         return
 
     if not target and url and isinstance(url, str):
         try:
             target = urlparse(url).path
-            span['attributes'] = attributes = {**attributes, SpanAttributes.HTTP_TARGET: target}
+            span['attributes'] = attributes = {**attributes, 'http.target': target}
         except Exception:  # pragma: no cover
             pass
 
@@ -224,9 +223,7 @@ def _tweak_http_spans(span: ReadableSpanDict):
         if span['kind'] == SpanKind.CLIENT:
             # For outgoing requests, we also want the domain, not just the path.
             server_name: Any = (
-                attributes.get(SpanAttributes.SERVER_ADDRESS)
-                or attributes.get(SpanAttributes.HTTP_SERVER_NAME)
-                or attributes.get(SpanAttributes.HTTP_HOST)
+                attributes.get('server.address') or attributes.get('http.server_name') or attributes.get('http.host')
             )
             if not server_name:
                 try:

diff --git a/logfire/_internal/exporters/test.py b/logfire/_internal/exporters/test.py
@@ -17,8 +17,6 @@
 from opentelemetry.sdk._logs.export import InMemoryLogExporter
 from opentelemetry.sdk.trace import Event, ReadableSpan
 from opentelemetry.sdk.trace.export import SpanExporter, SpanExportResult
-from opentelemetry.semconv.resource import ResourceAttributes
-from opentelemetry.semconv.trace import SpanAttributes
 
 from ..constants import ATTRIBUTES_SPAN_TYPE_KEY
 
@@ -82,15 +80,13 @@ def build_event(event: Event) -> dict[str, Any]:
             res: dict[str, Any] = {'name': event.name, 'timestamp': event.timestamp}
             if event.attributes:  # pragma: no branch
                 res['attributes'] = attributes = dict(event.attributes)
-                if SpanAttributes.EXCEPTION_STACKTRACE in attributes:
+                if 'exception.stacktrace' in attributes:
                     last_line = next(  # pragma: no branch
                         line.strip()
-                        for line in reversed(
-                            cast(str, event.attributes[SpanAttributes.EXCEPTION_STACKTRACE]).split('\n')
-                        )
+                        for line in reversed(cast(str, event.attributes['exception.stacktrace']).split('\n'))
                         if line.strip()
                     )
-                    attributes[SpanAttributes.EXCEPTION_STACKTRACE] = last_line
+                    attributes['exception.stacktrace'] = last_line
             return res
 
         def build_instrumentation_scope(span: ReadableSpan) -> dict[str, Any]:
@@ -148,10 +144,10 @@ def process_attribute(
     if name == 'code.function':
         if sys.version_info >= (3, 11) and strip_function_qualname:
             return value.split('.')[-1]
-    if name == ResourceAttributes.PROCESS_PID:
+    if name == 'process.pid':
         assert value == os.getpid()
         return 1234
-    if name == ResourceAttributes.SERVICE_INSTANCE_ID:
+    if name == 'service.instance.id':
         if re.match(r'^[0-9a-f]{32}$', value):
             return '0' * 32
     if parse_json_attributes and isinstance(value, str) and (value.startswith('{') or value.startswith('[')):

diff --git a/logfire/_internal/integrations/fastapi.py b/logfire/_internal/integrations/fastapi.py
@@ -11,7 +11,6 @@
 from fastapi import BackgroundTasks, FastAPI
 from fastapi.routing import APIRoute, APIWebSocketRoute, Mount
 from fastapi.security import SecurityScopes
-from opentelemetry.semconv.trace import SpanAttributes
 from opentelemetry.trace import Span
 from starlette.requests import Request
 from starlette.responses import Response
@@ -78,7 +77,7 @@ def instrument_fastapi(
         'meter_provider': logfire_instance.config.get_meter_provider(),
         **opentelemetry_kwargs,
     }
-    FastAPIInstrumentor.instrument_app(  # type: ignore
+    FastAPIInstrumentor.instrument_app(
         app,
         excluded_urls=excluded_urls,
         server_request_hook=_server_request_hook(opentelemetry_kwargs.pop('server_request_hook', None)),
@@ -170,10 +169,10 @@ async def solve_dependencies(self, request: Request | WebSocket, original: Await
         with self.logfire_instance.span('FastAPI arguments') as span:
             with handle_internal_errors:
                if isinstance(request, Request):  # pragma: no branch
-                    span.set_attribute(SpanAttributes.HTTP_METHOD, request.method)
+                    span.set_attribute('http.method', request.method)
                 route: APIRoute | APIWebSocketRoute | None = request.scope.get('route')
                 if route:  # pragma: no branch
-                    span.set_attribute(SpanAttributes.HTTP_ROUTE, route.path)
+                    span.set_attribute('http.route', route.path)
                     fastapi_route_attributes: dict[str, Any] = {'fastapi.route.name': route.name}
                     if isinstance(route, APIRoute):  # pragma: no branch
                         fastapi_route_attributes['fastapi.route.operation_id'] = route.operation_id

diff --git a/logfire/_internal/integrations/httpx.py b/logfire/_internal/integrations/httpx.py
@@ -148,7 +148,17 @@ def instrument_httpx(
             )
 
         tracer_provider = final_kwargs['tracer_provider']
-        instrumentor.instrument_client(client, tracer_provider, request_hook, response_hook)  # type: ignore[reportArgumentType]
+        meter_provider = final_kwargs['meter_provider']
+        client_kwargs = dict(
+            tracer_provider=tracer_provider,
+            request_hook=request_hook,
+            response_hook=response_hook,
+        )
+        try:
+            instrumentor.instrument_client(client, meter_provider=meter_provider, **client_kwargs)
+        except TypeError:  # pragma: no cover
+            # This is a fallback for older versions of opentelemetry-instrumentation-httpx
+            instrumentor.instrument_client(client, **client_kwargs)
 
 
 class LogfireHttpxInfoMixin:

diff --git a/logfire/_internal/scrubbing.py b/logfire/_internal/scrubbing.py
@@ -11,7 +11,6 @@
 from opentelemetry.attributes import BoundedAttributes
 from opentelemetry.sdk._logs import LogRecord
 from opentelemetry.sdk.trace import Event
-from opentelemetry.semconv.trace import SpanAttributes
 from opentelemetry.trace import Link
 
 from .constants import (
@@ -122,22 +121,21 @@ class BaseScrubber(ABC):
         ATTRIBUTES_SCRUBBED_KEY,
         RESOURCE_ATTRIBUTES_PACKAGE_VERSIONS,
         *STACK_INFO_KEYS,
-        SpanAttributes.EXCEPTION_STACKTRACE,
-        SpanAttributes.EXCEPTION_TYPE,
-        SpanAttributes.EXCEPTION_MESSAGE,
-        SpanAttributes.SCHEMA_URL,
-        SpanAttributes.HTTP_METHOD,
-        SpanAttributes.HTTP_STATUS_CODE,
-        SpanAttributes.HTTP_SCHEME,
-        SpanAttributes.HTTP_URL,
-        SpanAttributes.HTTP_TARGET,
-        SpanAttributes.HTTP_ROUTE,
-        SpanAttributes.DB_STATEMENT,
+        'exception.stacktrace',
+        'exception.type',
+        'exception.message',
+        'http.method',
+        'http.status_code',
+        'http.scheme',
+        'http.url',
+        'http.target',
+        'http.route',
+        'db.statement',
         'db.plan',
         # Newer semantic conventions
-        SpanAttributes.URL_FULL,
-        SpanAttributes.URL_PATH,
-        SpanAttributes.URL_QUERY,
+        'url.full',
+        'url.path',
+        'url.query',
         'event.name',
         'agent_session_id',
         'do_not_scrub',

diff --git a/logfire/_internal/tracer.py b/logfire/_internal/tracer.py
@@ -18,8 +18,6 @@
     TracerProvider as SDKTracerProvider,
 )
 from opentelemetry.sdk.trace.id_generator import IdGenerator
-from opentelemetry.semconv.resource import ResourceAttributes
-from opentelemetry.semconv.trace import SpanAttributes
 from opentelemetry.trace import Link, NonRecordingSpan, Span, SpanContext, SpanKind, Tracer, TracerProvider
 from opentelemetry.trace.propagation import get_current_span
 from opentelemetry.trace.status import Status, StatusCode
@@ -104,7 +102,7 @@ def resource(self) -> Resource:  # pragma: no cover
         with self.lock:
             if isinstance(self.provider, SDKTracerProvider):
                 return self.provider.resource
-            return Resource.create({ResourceAttributes.SERVICE_NAME: self.config.service_name})
+            return Resource.create({'service.name': self.config.service_name})
 
     def force_flush(self, timeout_millis: int = 30000) -> bool:
         with self.lock:
@@ -382,7 +380,7 @@ def record_exception(
         # ignoring the passed exception.
         # So we override the stacktrace attribute with the correct one.
         stacktrace = ''.join(traceback.format_exception(type(exception), exception, exception.__traceback__))
-        attributes[SpanAttributes.EXCEPTION_STACKTRACE] = stacktrace
+        attributes['exception.stacktrace'] = stacktrace
 
     span.record_exception(exception, attributes=attributes, timestamp=timestamp, escaped=escaped)
 

diff --git a/pyproject.toml b/pyproject.toml
@@ -46,8 +46,8 @@ classifiers = [
     "Framework :: OpenTelemetry :: Instrumentations",
 ]
 dependencies = [
-    "opentelemetry-sdk >= 1.21.0, < 1.34.0",
-    "opentelemetry-exporter-otlp-proto-http >= 1.21.0, < 1.34.0",
+    "opentelemetry-sdk >= 1.21.0, < 1.35.0",
+    "opentelemetry-exporter-otlp-proto-http >= 1.21.0, < 1.35.0",
     "opentelemetry-instrumentation >= 0.41b0",
     "rich >= 13.4.2",
     "protobuf >= 4.23.4",