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0304ad0c3d
We do this to prevent foot guns. The default config uses a MemoryFilter, but users are free to change to logging to files directly. If they do then they have to ensure to set the `filters: [context]` on the right handler, otherwise records get written with the wrong context. Instead we move the logic to happen when we generate a record, which is when we *log* rather than *handle*. (It's possible to add filters to loggers in the config, however they don't apply to descendant loggers and so they have to be manually set on *every* logger used in the code base)
67 lines
2.3 KiB
YAML
67 lines
2.3 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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# [1]: https://docs.python.org/3.7/library/logging.config.html#configuration-dictionary-schema
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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. This means that
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# will be a delay for INFO/DEBUG logs to get written, but WARNING/ERROR
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# logs will still be flushed immediately.
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buffer:
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class: logging.handlers.MemoryHandler
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target: file
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# The capacity is the number of log lines that are buffered before
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# 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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capacity: 10
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flushLevel: 30 # Flush for WARNING logs as well
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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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twisted:
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# We send the twisted logging directly to the file handler,
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# to work around https://github.com/matrix-org/synapse/issues/3471
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# when using "buffer" logger. Use "console" to log to stderr instead.
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handlers: [file]
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propagate: false
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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 configuation 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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