Clean Chains Stack Traces and consolidate logging config. Fixes BT-13465 BT-13378

truss-chains/tests/itest_chain/itest_chain.py

@@ -1,10 +1,13 @@
+import logging
 import math
 
 from user_package import shared_chainlet
 from user_package.nested_package import io_types
 
 import truss_chains as chains
 
+logger = logging.getLogger(__name__)
+
 IMAGE_BASETEN = chains.DockerImage(
     base_image=chains.BasetenImage.PY310,
     pip_requirements_file=chains.make_abs_path_here("requirements.txt"),
@@ -103,6 +106,7 @@ def __init__(
         text_to_num: TextToNum = chains.depends(TextToNum),
         context=chains.depends_context(),
     ) -> None:
+        logging.info("User log root during load.")
         self._context = context
         self._data_generator = data_generator
         self._data_splitter = splitter
@@ -117,6 +121,8 @@ async def run_remote(
         ),
         simple_default_arg: list[str] = ["a", "b"],
     ) -> tuple[int, str, int, shared_chainlet.SplitTextOutput, list[str]]:
+        logging.info("User log root.")
+        logger.info("User log module.")
         data = self._data_generator.run_remote(length)
         text_parts, number, items = await self._data_splitter.run_remote(
             io_types.SplitTextInput(

truss-chains/truss_chains/deployment/deployment_client.py

@@ -221,11 +221,10 @@ def push(
 class DockerChainletService(b10_service.TrussService):
     """This service is for Chainlets (not for Chains)."""
 
-    def __init__(self, port: int, is_draft: bool, **kwargs):
+    def __init__(self, port: int, **kwargs):
         remote_url = f"http://localhost:{port}"
-        self._port = port
 
-        super().__init__(remote_url, is_draft, **kwargs)
+        super().__init__(remote_url, is_draft=False, **kwargs)
 
     def authenticate(self) -> Dict[str, str]:
         return {}
@@ -246,10 +245,6 @@ def is_ready(self) -> bool:
     def logs_url(self) -> str:
         raise NotImplementedError()
 
-    @property
-    def port(self) -> int:
-        return self._port
-
     @property
     def predict_url(self) -> str:
         return f"{self._service_url}/v1/models/model:predict"
@@ -272,6 +267,7 @@ def _push_service_docker(
         wait_for_server_ready=True,
         network="host",
         container_name_prefix=chainlet_display_name,
+        disable_json_logging=True,
     )
 
 
@@ -309,12 +305,13 @@ def _create_docker_chain(
     entrypoint_artifact: b10_types.ChainletArtifact,
     dependency_artifacts: list[b10_types.ChainletArtifact],
 ) -> DockerChainService:
-    chainlet_artifacts = [entrypoint_artifact, *dependency_artifacts]
+    chainlet_artifacts = [*dependency_artifacts, entrypoint_artifact]
     chainlet_to_predict_url: Dict[str, Dict[str, str]] = {}
     chainlet_to_service: Dict[str, DockerChainletService] = {}
     for chainlet_artifact in chainlet_artifacts:
         port = utils.get_free_port()
-        service = DockerChainletService(is_draft=True, port=port)
+        service = DockerChainletService(port)
+
         docker_internal_url = service.predict_url.replace(
             "localhost", "host.docker.internal"
         )
@@ -323,27 +320,16 @@ def _create_docker_chain(
         }
         chainlet_to_service[chainlet_artifact.name] = service
 
-    local_config_handler.LocalConfigHandler.set_dynamic_config(
-        definitions.DYNAMIC_CHAINLET_CONFIG_KEY, json.dumps(chainlet_to_predict_url)
-    )
+        local_config_handler.LocalConfigHandler.set_dynamic_config(
+            definitions.DYNAMIC_CHAINLET_CONFIG_KEY, json.dumps(chainlet_to_predict_url)
+        )
 
-    # TODO(Tyron): We run the Docker containers in a
-    #   separate for-loop to make sure that the dynamic
-    #   config is populated (the same one gets mounted
-    #   on all the containers). We should look into
-    #   consolidating the logic into a single for-loop.
-    #   One approach might be to use separate config
-    #   paths for each container under the `/tmp` dir.
-    for chainlet_artifact in chainlet_artifacts:
         truss_dir = chainlet_artifact.truss_dir
         logging.info(
             f"Building Chainlet `{chainlet_artifact.display_name}` docker image."
         )
         _push_service_docker(
-            truss_dir,
-            chainlet_artifact.display_name,
-            docker_options,
-            chainlet_to_service[chainlet_artifact.name].port,
+            truss_dir, chainlet_artifact.display_name, docker_options, port
         )
         logging.info(
             f"Pushed Chainlet `{chainlet_artifact.display_name}` as docker container."

truss/templates/control/control/application.py

@@ -1,5 +1,6 @@
 import asyncio
 import logging
+import logging.config
 import re
 from pathlib import Path
 from typing import Dict
@@ -13,7 +14,7 @@
 from helpers.inference_server_process_controller import InferenceServerProcessController
 from helpers.inference_server_starter import async_inference_server_startup_flow
 from helpers.truss_patch.model_container_patch_applier import ModelContainerPatchApplier
-from shared.logging import setup_logging
+from shared import log_config
 from starlette.datastructures import State
 
 
@@ -35,10 +36,11 @@ async def handle_model_load_failed(_, error):
 
 def create_app(base_config: Dict):
     app_state = State()
-    setup_logging()
     app_logger = logging.getLogger(__name__)
     app_state.logger = app_logger
 
+    logging.config.dictConfig(log_config.make_log_config("INFO"))
+
     for k, v in base_config.items():
         setattr(app_state, k, v)
 

truss/templates/server/common/errors.py

@@ -155,7 +155,30 @@ def intercept_exceptions(
         yield
     # Note that logger.error logs the stacktrace, such that the user can
     # debug this error from the logs.
-    except fastapi.HTTPException:
+    except fastapi.HTTPException as e:
+        # TODO: we try to avoid any dependency of the truss server on chains, but for
+        #  the purpose of getting readable chained-stack traces in the server logs,
+        #  we have to add a special-case here.
+        if "user_stack_trace" in e.detail:
+            try:
+                from truss_chains import definitions
+
+                chains_error = definitions.RemoteErrorDetail.model_validate(e.detail)
+                # The formatted error contains a (potentially chained) stack trace
+                # with all framework code removed, see
+                # truss_chains/remote_chainlet/utils.py::response_raise_errors.
+                logger.error(f"Chainlet raised Exception:\n{chains_error.format()}")
+            except:  # If we cannot import chains or parse the error.
+                logger.error(
+                    "Model raised HTTPException",
+                    exc_info=filter_traceback(model_file_name),
+                )
+                raise
+            # If error was extracted successfully, the customized stack trace is
+            # already printed above, so we raise with a clear traceback.
+            e.__traceback__ = None
+            raise e from None
+
         logger.error(
             "Model raised HTTPException", exc_info=filter_traceback(model_file_name)
         )

truss/templates/server/main.py

@@ -1,11 +1,9 @@
 import os
 
-from shared.logging import setup_logging
 from truss_server import TrussServer
 
 CONFIG_FILE = "config.yaml"
 
 if __name__ == "__main__":
-    setup_logging()
     http_port = int(os.environ.get("INFERENCE_SERVER_PORT", "8080"))
     TrussServer(http_port, CONFIG_FILE).start()

truss/templates/server/model_wrapper.py

@@ -298,9 +298,9 @@ def __init__(self, config: Dict, tracer: sdk_trace.Tracer):
         # We need a logger that has all our server JSON logging setup applied in its
         # handlers and where this also hold in the loading thread. Creating a new
         # instance does not carry over the setup into the thread and using unspecified
-        # `getLogger` may return non-compliant loggers if depdencies override the root
+        # `getLogger` may return non-compliant loggers if dependencies override the root
         # logger (c.g. https://github.com/numpy/numpy/issues/24213). We chose to get
-        # the uvicorn logger that is setup in `truss_server`.
+        # the uvicorn logger that is set up in `truss_server`.
         self._logger = logging.getLogger("uvicorn")
         self.name = MODEL_BASENAME
         self._load_lock = Lock()

truss/templates/server/truss_server.py

@@ -1,6 +1,7 @@
 import asyncio
 import json
 import logging
+import logging.config
 import os
 import signal
 import sys
@@ -21,8 +22,7 @@
 from opentelemetry import trace
 from opentelemetry.sdk import trace as sdk_trace
 from pydantic import BaseModel
-from shared import serialization
-from shared.logging import setup_logging
+from shared import log_config, serialization
 from shared.secrets_resolver import SecretsResolver
 from starlette.requests import ClientDisconnect
 from starlette.responses import Response
@@ -37,7 +37,6 @@
 # [IMPORTANT] A lot of things depend on this currently, change with extreme care.
 TIMEOUT_GRACEFUL_SHUTDOWN = 120
 INFERENCE_SERVER_FAILED_FILE = Path("~/inference_server_crashed.txt").expanduser()
-DATE_FORMAT = "%Y-%m-%d %H:%M:%S"
 
 
 async def parse_body(request: Request) -> bytes:
@@ -260,12 +259,10 @@ class TrussServer:
 
     _server: Optional[uvicorn.Server]
 
-    def __init__(
-        self,
-        http_port: int,
-        config_or_path: Union[str, Path, Dict],
-        setup_json_logger: bool = True,
-    ):
+    def __init__(self, http_port: int, config_or_path: Union[str, Path, Dict]):
+        # This is run before uvicorn is up. Need explicit logging config here.
+        logging.config.dictConfig(log_config.make_log_config("INFO"))
+
         if isinstance(config_or_path, (str, Path)):
             with open(config_or_path, encoding="utf-8") as config_file:
                 config = yaml.safe_load(config_file)
@@ -274,7 +271,6 @@ def __init__(
 
         secrets = SecretsResolver.get_secrets(config)
         tracer = tracing.get_truss_tracer(secrets, config)
-        self._setup_json_logger = setup_json_logger
         self._http_port = http_port
         self._config = config
         self._model = ModelWrapper(self._config, tracer)
@@ -291,8 +287,6 @@ def on_startup(self):
         we want to setup our logging and model.
         """
         self.cleanup()
-        if self._setup_json_logger:
-            setup_logging()
         self._model.start_load_thread()
         asyncio.create_task(self._shutdown_if_load_fails())
         self._model.setup_polling_for_environment_updates()
@@ -366,9 +360,6 @@ def start(self):
             if self._config["runtime"].get("enable_debug_logs", False)
             else "INFO"
         )
-        # Warning: `ModelWrapper` depends on correctly setup `uvicorn` logger,
-        # if you change/remove that logger, make sure `ModelWrapper` has a suitable
-        # alternative logger that is also correctly setup in the load thread.
         cfg = uvicorn.Config(
             self.create_application(),
             # We hard-code the http parser as h11 (the default) in case the user has
@@ -379,45 +370,7 @@ def start(self):
             port=self._http_port,
             workers=1,
             timeout_graceful_shutdown=TIMEOUT_GRACEFUL_SHUTDOWN,
-            log_config={
-                "version": 1,
-                "formatters": {
-                    "default": {
-                        "()": "uvicorn.logging.DefaultFormatter",
-                        "datefmt": DATE_FORMAT,
-                        "fmt": "%(asctime)s.%(msecs)03d %(name)s %(levelprefix)s %(message)s",
-                        "use_colors": None,
-                    },
-                    "access": {
-                        "()": "uvicorn.logging.AccessFormatter",
-                        "datefmt": DATE_FORMAT,
-                        "fmt": "%(asctime)s.%(msecs)03d %(name)s %(levelprefix)s %(client_addr)s %(process)s - "
-                        '"%(request_line)s" %(status_code)s',
-                        # noqa: E501
-                    },
-                },
-                "handlers": {
-                    "default": {
-                        "formatter": "default",
-                        "class": "logging.StreamHandler",
-                        "stream": "ext://sys.stderr",
-                    },
-                    "access": {
-                        "formatter": "access",
-                        "class": "logging.StreamHandler",
-                        "stream": "ext://sys.stdout",
-                    },
-                },
-                "loggers": {
-                    "uvicorn": {"handlers": ["default"], "level": log_level},
-                    "uvicorn.error": {"level": "INFO"},
-                    "uvicorn.access": {
-                        "handlers": ["access"],
-                        "level": "INFO",
-                        "propagate": False,
-                    },
-                },
-            },
+            log_config=log_config.make_log_config(log_level),
         )
         cfg.setup_event_loop()  # Call this so uvloop gets used
         server = uvicorn.Server(config=cfg)