diff options
Diffstat (limited to 'synapse/config/logger.py')
| -rw-r--r-- | synapse/config/logger.py | 98 |
1 files changed, 49 insertions, 49 deletions
diff --git a/synapse/config/logger.py b/synapse/config/logger.py index 13d6f6a3ea..d4e887a3e0 100644 --- a/synapse/config/logger.py +++ b/synapse/config/logger.py @@ -23,7 +23,6 @@ from string import Template import yaml from twisted.logger import ( - ILogObserver, LogBeginner, STDLibLogObserver, eventAsText, @@ -32,11 +31,9 @@ from twisted.logger import ( import synapse from synapse.app import _base as appbase -from synapse.logging._structured import ( - reload_structured_logging, - setup_structured_logging, -) +from synapse.logging._structured import setup_structured_logging from synapse.logging.context import LoggingContextFilter +from synapse.logging.filter import MetadataFilter from synapse.util.versionstring import get_version_string from ._base import Config, ConfigError @@ -48,7 +45,11 @@ DEFAULT_LOG_CONFIG = Template( # This is a YAML file containing a standard Python logging configuration # dictionary. See [1] for details on the valid settings. # +# Synapse also supports structured logging for machine readable logs which can +# be ingested by ELK stacks. See [2] for details. +# # [1]: https://docs.python.org/3.7/library/logging.config.html#configuration-dictionary-schema +# [2]: https://github.com/matrix-org/synapse/blob/master/docs/structured_logging.md version: 1 @@ -105,7 +106,7 @@ root: # then write them to a file. # # Replace "buffer" with "console" to log to stderr instead. (Note that you'll - # also need to update the configuation for the `twisted` logger above, in + # also need to update the configuration for the `twisted` logger above, in # this case.) # handlers: [buffer] @@ -176,11 +177,11 @@ class LoggingConfig(Config): log_config_file.write(DEFAULT_LOG_CONFIG.substitute(log_file=log_file)) -def _setup_stdlib_logging(config, log_config, logBeginner: LogBeginner): +def _setup_stdlib_logging(config, log_config_path, logBeginner: LogBeginner) -> None: """ - Set up Python stdlib logging. + Set up Python standard library logging. """ - if log_config is None: + if log_config_path is None: log_format = ( "%(asctime)s - %(name)s - %(lineno)d - %(levelname)s - %(request)s" " - %(message)s" @@ -196,7 +197,8 @@ def _setup_stdlib_logging(config, log_config, logBeginner: LogBeginner): handler.setFormatter(formatter) logger.addHandler(handler) else: - logging.config.dictConfig(log_config) + # Load the logging configuration. + _load_logging_config(log_config_path) # We add a log record factory that runs all messages through the # LoggingContextFilter so that we get the context *at the time we log* @@ -204,12 +206,14 @@ def _setup_stdlib_logging(config, log_config, logBeginner: LogBeginner): # filter options, but care must when using e.g. MemoryHandler to buffer # writes. - log_filter = LoggingContextFilter(request="") + log_context_filter = LoggingContextFilter(request="") + log_metadata_filter = MetadataFilter({"server_name": config.server_name}) old_factory = logging.getLogRecordFactory() def factory(*args, **kwargs): record = old_factory(*args, **kwargs) - log_filter.filter(record) + log_context_filter.filter(record) + log_metadata_filter.filter(record) return record logging.setLogRecordFactory(factory) @@ -255,21 +259,40 @@ def _setup_stdlib_logging(config, log_config, logBeginner: LogBeginner): 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("") +def _load_logging_config(log_config_path: str) -> None: + """ + Configure logging from a log config path. + """ + with open(log_config_path, "rb") as f: + log_config = yaml.safe_load(f.read()) if not log_config: - logger.warning("Reloaded a blank config?") + logging.warning("Loaded a blank logging config?") + + # If the old structured logging configuration is being used, convert it to + # the new style configuration. + if "structured" in log_config and log_config.get("structured"): + log_config = setup_structured_logging(log_config) logging.config.dictConfig(log_config) +def _reload_logging_config(log_config_path): + """ + Reload the log configuration from the file and apply it. + """ + # If no log config path was given, it cannot be reloaded. + if log_config_path is None: + return + + _load_logging_config(log_config_path) + logging.info("Reloaded log config from %s due to SIGHUP", log_config_path) + + def setup_logging( hs, config, use_worker_options=False, logBeginner: LogBeginner = globalLogBeginner -) -> ILogObserver: +) -> None: """ Set up the logging subsystem. @@ -282,41 +305,18 @@ def setup_logging( 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_path = ( + config.worker_log_config if use_worker_options else config.log_config + ) - log_config_body = read_config() + # Perform one-time logging configuration. + _setup_stdlib_logging(config, log_config_path, logBeginner=logBeginner) + # Add a SIGHUP handler to reload the logging configuration, if one is available. + appbase.register_sighup(_reload_logging_config, log_config_path) - 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 + # Log immediately so we can grep backwards. logging.warning("***** STARTING SERVER *****") logging.warning("Server %s version %s", sys.argv[0], get_version_string(synapse)) logging.info("Server hostname: %s", config.server_name) logging.info("Instance name: %s", hs.get_instance_name()) - - return logger |