mirror of
https://mau.dev/maunium/synapse.git
synced 2024-08-27 12:42:39 +00:00
375 lines
12 KiB
Python
375 lines
12 KiB
Python
# -*- coding: utf-8 -*-
|
|
# Copyright 2019 The Matrix.org Foundation C.I.C.
|
|
#
|
|
# 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 logging
|
|
import os.path
|
|
import sys
|
|
import typing
|
|
import warnings
|
|
from typing import List
|
|
|
|
import attr
|
|
from constantly import NamedConstant, Names, ValueConstant, Values
|
|
from zope.interface import implementer
|
|
|
|
from twisted.logger import (
|
|
FileLogObserver,
|
|
FilteringLogObserver,
|
|
ILogObserver,
|
|
LogBeginner,
|
|
Logger,
|
|
LogLevel,
|
|
LogLevelFilterPredicate,
|
|
LogPublisher,
|
|
eventAsText,
|
|
jsonFileLogObserver,
|
|
)
|
|
|
|
from synapse.config._base import ConfigError
|
|
from synapse.logging._terse_json import (
|
|
TerseJSONToConsoleLogObserver,
|
|
TerseJSONToTCPLogObserver,
|
|
)
|
|
from synapse.logging.context import LoggingContext
|
|
|
|
|
|
def stdlib_log_level_to_twisted(level: str) -> LogLevel:
|
|
"""
|
|
Convert a stdlib log level to Twisted's log level.
|
|
"""
|
|
lvl = level.lower().replace("warning", "warn")
|
|
return LogLevel.levelWithName(lvl)
|
|
|
|
|
|
@attr.s
|
|
@implementer(ILogObserver)
|
|
class LogContextObserver(object):
|
|
"""
|
|
An ILogObserver which adds Synapse-specific log context information.
|
|
|
|
Attributes:
|
|
observer (ILogObserver): The target parent observer.
|
|
"""
|
|
|
|
observer = attr.ib()
|
|
|
|
def __call__(self, event: dict) -> None:
|
|
"""
|
|
Consume a log event and emit it to the parent observer after filtering
|
|
and adding log context information.
|
|
|
|
Args:
|
|
event (dict)
|
|
"""
|
|
# Filter out some useless events that Twisted outputs
|
|
if "log_text" in event:
|
|
if event["log_text"].startswith("DNSDatagramProtocol starting on "):
|
|
return
|
|
|
|
if event["log_text"].startswith("(UDP Port "):
|
|
return
|
|
|
|
if event["log_text"].startswith("Timing out client") or event[
|
|
"log_format"
|
|
].startswith("Timing out client"):
|
|
return
|
|
|
|
context = LoggingContext.current_context()
|
|
|
|
# Copy the context information to the log event.
|
|
if context is not None:
|
|
context.copy_to_twisted_log_entry(event)
|
|
else:
|
|
# If there's no logging context, not even the root one, we might be
|
|
# starting up or it might be from non-Synapse code. Log it as if it
|
|
# came from the root logger.
|
|
event["request"] = None
|
|
event["scope"] = None
|
|
|
|
self.observer(event)
|
|
|
|
|
|
class PythonStdlibToTwistedLogger(logging.Handler):
|
|
"""
|
|
Transform a Python stdlib log message into a Twisted one.
|
|
"""
|
|
|
|
def __init__(self, observer, *args, **kwargs):
|
|
"""
|
|
Args:
|
|
observer (ILogObserver): A Twisted logging observer.
|
|
*args, **kwargs: Args/kwargs to be passed to logging.Handler.
|
|
"""
|
|
self.observer = observer
|
|
super().__init__(*args, **kwargs)
|
|
|
|
def emit(self, record: logging.LogRecord) -> None:
|
|
"""
|
|
Emit a record to Twisted's observer.
|
|
|
|
Args:
|
|
record (logging.LogRecord)
|
|
"""
|
|
|
|
self.observer(
|
|
{
|
|
"log_time": record.created,
|
|
"log_text": record.getMessage(),
|
|
"log_format": "{log_text}",
|
|
"log_namespace": record.name,
|
|
"log_level": stdlib_log_level_to_twisted(record.levelname),
|
|
}
|
|
)
|
|
|
|
|
|
def SynapseFileLogObserver(outFile: typing.IO[str]) -> FileLogObserver:
|
|
"""
|
|
A log observer that formats events like the traditional log formatter and
|
|
sends them to `outFile`.
|
|
|
|
Args:
|
|
outFile (file object): The file object to write to.
|
|
"""
|
|
|
|
def formatEvent(_event: dict) -> str:
|
|
event = dict(_event)
|
|
event["log_level"] = event["log_level"].name.upper()
|
|
event["log_format"] = "- {log_namespace} - {log_level} - {request} - " + (
|
|
event.get("log_format", "{log_text}") or "{log_text}"
|
|
)
|
|
return eventAsText(event, includeSystem=False) + "\n"
|
|
|
|
return FileLogObserver(outFile, formatEvent)
|
|
|
|
|
|
class DrainType(Names):
|
|
CONSOLE = NamedConstant()
|
|
CONSOLE_JSON = NamedConstant()
|
|
CONSOLE_JSON_TERSE = NamedConstant()
|
|
FILE = NamedConstant()
|
|
FILE_JSON = NamedConstant()
|
|
NETWORK_JSON_TERSE = NamedConstant()
|
|
|
|
|
|
class OutputPipeType(Values):
|
|
stdout = ValueConstant(sys.__stdout__)
|
|
stderr = ValueConstant(sys.__stderr__)
|
|
|
|
|
|
@attr.s
|
|
class DrainConfiguration(object):
|
|
name = attr.ib()
|
|
type = attr.ib()
|
|
location = attr.ib()
|
|
options = attr.ib(default=None)
|
|
|
|
|
|
@attr.s
|
|
class NetworkJSONTerseOptions(object):
|
|
maximum_buffer = attr.ib(type=int)
|
|
|
|
|
|
DEFAULT_LOGGERS = {"synapse": {"level": "INFO"}}
|
|
|
|
|
|
def parse_drain_configs(
|
|
drains: dict
|
|
) -> typing.Generator[DrainConfiguration, None, None]:
|
|
"""
|
|
Parse the drain configurations.
|
|
|
|
Args:
|
|
drains (dict): A list of drain configurations.
|
|
|
|
Yields:
|
|
DrainConfiguration instances.
|
|
|
|
Raises:
|
|
ConfigError: If any of the drain configuration items are invalid.
|
|
"""
|
|
for name, config in drains.items():
|
|
if "type" not in config:
|
|
raise ConfigError("Logging drains require a 'type' key.")
|
|
|
|
try:
|
|
logging_type = DrainType.lookupByName(config["type"].upper())
|
|
except ValueError:
|
|
raise ConfigError(
|
|
"%s is not a known logging drain type." % (config["type"],)
|
|
)
|
|
|
|
if logging_type in [
|
|
DrainType.CONSOLE,
|
|
DrainType.CONSOLE_JSON,
|
|
DrainType.CONSOLE_JSON_TERSE,
|
|
]:
|
|
location = config.get("location")
|
|
if location is None or location not in ["stdout", "stderr"]:
|
|
raise ConfigError(
|
|
(
|
|
"The %s drain needs the 'location' key set to "
|
|
"either 'stdout' or 'stderr'."
|
|
)
|
|
% (logging_type,)
|
|
)
|
|
|
|
pipe = OutputPipeType.lookupByName(location).value
|
|
|
|
yield DrainConfiguration(name=name, type=logging_type, location=pipe)
|
|
|
|
elif logging_type in [DrainType.FILE, DrainType.FILE_JSON]:
|
|
if "location" not in config:
|
|
raise ConfigError(
|
|
"The %s drain needs the 'location' key set." % (logging_type,)
|
|
)
|
|
|
|
location = config.get("location")
|
|
if os.path.abspath(location) != location:
|
|
raise ConfigError(
|
|
"File paths need to be absolute, '%s' is a relative path"
|
|
% (location,)
|
|
)
|
|
yield DrainConfiguration(name=name, type=logging_type, location=location)
|
|
|
|
elif logging_type in [DrainType.NETWORK_JSON_TERSE]:
|
|
host = config.get("host")
|
|
port = config.get("port")
|
|
maximum_buffer = config.get("maximum_buffer", 1000)
|
|
yield DrainConfiguration(
|
|
name=name,
|
|
type=logging_type,
|
|
location=(host, port),
|
|
options=NetworkJSONTerseOptions(maximum_buffer=maximum_buffer),
|
|
)
|
|
|
|
else:
|
|
raise ConfigError(
|
|
"The %s drain type is currently not implemented."
|
|
% (config["type"].upper(),)
|
|
)
|
|
|
|
|
|
def setup_structured_logging(
|
|
hs,
|
|
config,
|
|
log_config: dict,
|
|
logBeginner: LogBeginner,
|
|
redirect_stdlib_logging: bool = True,
|
|
) -> LogPublisher:
|
|
"""
|
|
Set up Twisted's structured logging system.
|
|
|
|
Args:
|
|
hs: The homeserver to use.
|
|
config (HomeserverConfig): The configuration of the Synapse homeserver.
|
|
log_config (dict): The log configuration to use.
|
|
"""
|
|
if config.no_redirect_stdio:
|
|
raise ConfigError(
|
|
"no_redirect_stdio cannot be defined using structured logging."
|
|
)
|
|
|
|
logger = Logger()
|
|
|
|
if "drains" not in log_config:
|
|
raise ConfigError("The logging configuration requires a list of drains.")
|
|
|
|
observers = [] # type: List[ILogObserver]
|
|
|
|
for observer in parse_drain_configs(log_config["drains"]):
|
|
# Pipe drains
|
|
if observer.type == DrainType.CONSOLE:
|
|
logger.debug(
|
|
"Starting up the {name} console logger drain", name=observer.name
|
|
)
|
|
observers.append(SynapseFileLogObserver(observer.location))
|
|
elif observer.type == DrainType.CONSOLE_JSON:
|
|
logger.debug(
|
|
"Starting up the {name} JSON console logger drain", name=observer.name
|
|
)
|
|
observers.append(jsonFileLogObserver(observer.location))
|
|
elif observer.type == DrainType.CONSOLE_JSON_TERSE:
|
|
logger.debug(
|
|
"Starting up the {name} terse JSON console logger drain",
|
|
name=observer.name,
|
|
)
|
|
observers.append(
|
|
TerseJSONToConsoleLogObserver(observer.location, metadata={})
|
|
)
|
|
|
|
# File drains
|
|
elif observer.type == DrainType.FILE:
|
|
logger.debug("Starting up the {name} file logger drain", name=observer.name)
|
|
log_file = open(observer.location, "at", buffering=1, encoding="utf8")
|
|
observers.append(SynapseFileLogObserver(log_file))
|
|
elif observer.type == DrainType.FILE_JSON:
|
|
logger.debug(
|
|
"Starting up the {name} JSON file logger drain", name=observer.name
|
|
)
|
|
log_file = open(observer.location, "at", buffering=1, encoding="utf8")
|
|
observers.append(jsonFileLogObserver(log_file))
|
|
|
|
elif observer.type == DrainType.NETWORK_JSON_TERSE:
|
|
metadata = {"server_name": hs.config.server_name}
|
|
log_observer = TerseJSONToTCPLogObserver(
|
|
hs=hs,
|
|
host=observer.location[0],
|
|
port=observer.location[1],
|
|
metadata=metadata,
|
|
maximum_buffer=observer.options.maximum_buffer,
|
|
)
|
|
log_observer.start()
|
|
observers.append(log_observer)
|
|
else:
|
|
# We should never get here, but, just in case, throw an error.
|
|
raise ConfigError("%s drain type cannot be configured" % (observer.type,))
|
|
|
|
publisher = LogPublisher(*observers)
|
|
log_filter = LogLevelFilterPredicate()
|
|
|
|
for namespace, namespace_config in log_config.get(
|
|
"loggers", DEFAULT_LOGGERS
|
|
).items():
|
|
# Set the log level for twisted.logger.Logger namespaces
|
|
log_filter.setLogLevelForNamespace(
|
|
namespace,
|
|
stdlib_log_level_to_twisted(namespace_config.get("level", "INFO")),
|
|
)
|
|
|
|
# Also set the log levels for the stdlib logger namespaces, to prevent
|
|
# them getting to PythonStdlibToTwistedLogger and having to be formatted
|
|
if "level" in namespace_config:
|
|
logging.getLogger(namespace).setLevel(namespace_config.get("level"))
|
|
|
|
f = FilteringLogObserver(publisher, [log_filter])
|
|
lco = LogContextObserver(f)
|
|
|
|
if redirect_stdlib_logging:
|
|
stuff_into_twisted = PythonStdlibToTwistedLogger(lco)
|
|
stdliblogger = logging.getLogger()
|
|
stdliblogger.addHandler(stuff_into_twisted)
|
|
|
|
# Always redirect standard I/O, otherwise other logging outputs might miss
|
|
# it.
|
|
logBeginner.beginLoggingTo([lco], redirectStandardIO=True)
|
|
|
|
return publisher
|
|
|
|
|
|
def reload_structured_logging(*args, log_config=None) -> None:
|
|
warnings.warn(
|
|
"Currently the structured logging system can not be reloaded, doing nothing"
|
|
)
|