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8d156ec0ba
This was originally added when we first added a `MemoryHandler` to the default log config back in https://github.com/matrix-org/synapse/pull/8040, to ensure that we didn't explode with an infinite loop if there was an error formatting the logs. Since then, we made additional improvements to logging which make this workaround redundant. In particular: * we no longer attempt to log un-UTF8-decodable byte sequences, which were the most likely cause of an error in the first place. * https://github.com/matrix-org/synapse/pull/8268 ensures that in the unlikely case that there *is* an error, it won't cause an infinite loop.
78 lines
2.8 KiB
YAML
78 lines
2.8 KiB
YAML
# Log configuration for Synapse.
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#
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# This is a YAML file containing a standard Python logging configuration
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# dictionary. See [1] for details on the valid settings.
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#
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# Synapse also supports structured logging for machine readable logs which can
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# be ingested by ELK stacks. See [2] for details.
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#
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# [1]: https://docs.python.org/3.7/library/logging.config.html#configuration-dictionary-schema
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# [2]: https://matrix-org.github.io/synapse/latest/structured_logging.html
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version: 1
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formatters:
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precise:
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format: '%(asctime)s - %(name)s - %(lineno)d - %(levelname)s - %(request)s - %(message)s'
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handlers:
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file:
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class: logging.handlers.TimedRotatingFileHandler
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formatter: precise
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filename: /var/log/matrix-synapse/homeserver.log
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when: midnight
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backupCount: 3 # Does not include the current log file.
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encoding: utf8
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# Default to buffering writes to log file for efficiency.
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# WARNING/ERROR logs will still be flushed immediately, but there will be a
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# delay (of up to `period` seconds, or until the buffer is full with
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# `capacity` messages) before INFO/DEBUG logs get written.
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buffer:
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class: synapse.logging.handlers.PeriodicallyFlushingMemoryHandler
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target: file
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# The capacity is the maximum number of log lines that are buffered
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# before being written to disk. Increasing this will lead to better
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# performance, at the expensive of it taking longer for log lines to
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# be written to disk.
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# This parameter is required.
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capacity: 10
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# Logs with a level at or above the flush level will cause the buffer to
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# be flushed immediately.
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# Default value: 40 (ERROR)
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# Other values: 50 (CRITICAL), 30 (WARNING), 20 (INFO), 10 (DEBUG)
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flushLevel: 30 # Flush immediately for WARNING logs and higher
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# The period of time, in seconds, between forced flushes.
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# Messages will not be delayed for longer than this time.
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# Default value: 5 seconds
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period: 5
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# A handler that writes logs to stderr. Unused by default, but can be used
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# instead of "buffer" and "file" in the logger handlers.
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console:
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class: logging.StreamHandler
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formatter: precise
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loggers:
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synapse.storage.SQL:
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# beware: increasing this to DEBUG will make synapse log sensitive
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# information such as access tokens.
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level: INFO
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root:
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level: INFO
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# Write logs to the `buffer` handler, which will buffer them together in memory,
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# then write them to a file.
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#
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# Replace "buffer" with "console" to log to stderr instead. (Note that you'll
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# also need to update the configuration for the `twisted` logger above, in
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# this case.)
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#
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handlers: [buffer]
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disable_existing_loggers: false
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