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- # -*- coding: utf-8 -*-
- # Copyright 2014-2016 OpenMarket Ltd
- #
- # 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 logging.config
- import os
- import sys
- from string import Template
- import yaml
- from twisted.logger import (
- ILogObserver,
- LogBeginner,
- STDLibLogObserver,
- globalLogBeginner,
- )
- import synapse
- from synapse.app import _base as appbase
- from synapse.logging._structured import (
- reload_structured_logging,
- setup_structured_logging,
- )
- from synapse.logging.context import LoggingContextFilter
- from synapse.util.versionstring import get_version_string
- from ._base import Config
- DEFAULT_LOG_CONFIG = Template(
- """
- version: 1
- formatters:
- precise:
- format: '%(asctime)s - %(name)s - %(lineno)d - %(levelname)s - \
- %(request)s - %(message)s'
- filters:
- context:
- (): synapse.logging.context.LoggingContextFilter
- request: ""
- handlers:
- file:
- class: logging.handlers.RotatingFileHandler
- formatter: precise
- filename: ${log_file}
- maxBytes: 104857600
- backupCount: 10
- filters: [context]
- encoding: utf8
- console:
- class: logging.StreamHandler
- formatter: precise
- filters: [context]
- loggers:
- synapse:
- level: INFO
- synapse.storage.SQL:
- # beware: increasing this to DEBUG will make synapse log sensitive
- # information such as access tokens.
- level: INFO
- root:
- level: INFO
- handlers: [file, console]
- """
- )
- class LoggingConfig(Config):
- def read_config(self, config, **kwargs):
- self.log_config = self.abspath(config.get("log_config"))
- self.no_redirect_stdio = config.get("no_redirect_stdio", False)
- def generate_config_section(self, config_dir_path, server_name, **kwargs):
- log_config = os.path.join(config_dir_path, server_name + ".log.config")
- return (
- """\
- ## Logging ##
- # A yaml python logging config file as described by
- # https://docs.python.org/3.7/library/logging.config.html#configuration-dictionary-schema
- #
- log_config: "%(log_config)s"
- """
- % locals()
- )
- def read_arguments(self, args):
- if args.no_redirect_stdio is not None:
- self.no_redirect_stdio = args.no_redirect_stdio
- @staticmethod
- def add_arguments(parser):
- logging_group = parser.add_argument_group("logging")
- logging_group.add_argument(
- "-n",
- "--no-redirect-stdio",
- action="store_true",
- default=None,
- help="Do not redirect stdout/stderr to the log",
- )
- def generate_files(self, config, config_dir_path):
- log_config = config.get("log_config")
- if log_config and not os.path.exists(log_config):
- log_file = self.abspath("homeserver.log")
- print(
- "Generating log config file %s which will log to %s"
- % (log_config, log_file)
- )
- with open(log_config, "w") as log_config_file:
- log_config_file.write(DEFAULT_LOG_CONFIG.substitute(log_file=log_file))
- def _setup_stdlib_logging(config, log_config, logBeginner: LogBeginner):
- """
- Set up Python stdlib logging.
- """
- if log_config is None:
- log_format = (
- "%(asctime)s - %(name)s - %(lineno)d - %(levelname)s - %(request)s"
- " - %(message)s"
- )
- logger = logging.getLogger("")
- logger.setLevel(logging.INFO)
- logging.getLogger("synapse.storage.SQL").setLevel(logging.INFO)
- formatter = logging.Formatter(log_format)
- handler = logging.StreamHandler()
- handler.setFormatter(formatter)
- handler.addFilter(LoggingContextFilter(request=""))
- logger.addHandler(handler)
- else:
- logging.config.dictConfig(log_config)
- # Route Twisted's native logging through to the standard library logging
- # system.
- observer = STDLibLogObserver()
- def _log(event):
- 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"):
- return
- return observer(event)
- logBeginner.beginLoggingTo([_log], redirectStandardIO=not config.no_redirect_stdio)
- if not config.no_redirect_stdio:
- print("Redirected stdout/stderr to logs")
- return observer
- def _reload_stdlib_logging(*args, log_config=None):
- logger = logging.getLogger("")
- if not log_config:
- logger.warn("Reloaded a blank config?")
- logging.config.dictConfig(log_config)
- def setup_logging(
- hs, config, use_worker_options=False, logBeginner: LogBeginner = globalLogBeginner
- ) -> ILogObserver:
- """
- Set up the logging subsystem.
- Args:
- config (LoggingConfig | synapse.config.workers.WorkerConfig):
- configuration data
- use_worker_options (bool): True to use the 'worker_log_config' option
- instead of 'log_config'.
- logBeginner: The Twisted logBeginner to use.
- Returns:
- The "root" Twisted Logger observer, suitable for sending logs to from a
- Logger instance.
- """
- log_config = config.worker_log_config if use_worker_options else config.log_config
- def read_config(*args, callback=None):
- if log_config is None:
- return None
- with open(log_config, "rb") as f:
- log_config_body = yaml.safe_load(f.read())
- if callback:
- callback(log_config=log_config_body)
- logging.info("Reloaded log config from %s due to SIGHUP", log_config)
- return log_config_body
- log_config_body = read_config()
- if log_config_body and log_config_body.get("structured") is True:
- logger = setup_structured_logging(
- hs, config, log_config_body, logBeginner=logBeginner
- )
- appbase.register_sighup(read_config, callback=reload_structured_logging)
- else:
- logger = _setup_stdlib_logging(config, log_config_body, logBeginner=logBeginner)
- appbase.register_sighup(read_config, callback=_reload_stdlib_logging)
- # make sure that the first thing we log is a thing we can grep backwards
- # for
- logging.warn("***** STARTING SERVER *****")
- logging.warn("Server %s version %s", sys.argv[0], get_version_string(synapse))
- logging.info("Server hostname: %s", config.server_name)
- return logger
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