mirror of
https://mau.dev/maunium/synapse.git
synced 2024-11-14 14:01:59 +01:00
80 lines
2.5 KiB
Markdown
80 lines
2.5 KiB
Markdown
# Structured Logging
|
|
|
|
A structured logging system can be useful when your logs are destined for a
|
|
machine to parse and process. By maintaining its machine-readable characteristics,
|
|
it enables more efficient searching and aggregations when consumed by software
|
|
such as the [ELK stack](https://opensource.com/article/18/9/open-source-log-aggregation-tools).
|
|
|
|
Synapse's structured logging system is configured via the file that Synapse's
|
|
`log_config` config option points to. The file should include a formatter which
|
|
uses the `synapse.logging.TerseJsonFormatter` class included with Synapse and a
|
|
handler which uses the above formatter.
|
|
|
|
There is also a `synapse.logging.JsonFormatter` option which does not include
|
|
a timestamp in the resulting JSON. This is useful if the log ingester adds its
|
|
own timestamp.
|
|
|
|
A structured logging configuration looks similar to the following:
|
|
|
|
```yaml
|
|
version: 1
|
|
|
|
formatters:
|
|
structured:
|
|
class: synapse.logging.TerseJsonFormatter
|
|
|
|
handlers:
|
|
file:
|
|
class: logging.handlers.TimedRotatingFileHandler
|
|
formatter: structured
|
|
filename: /path/to/my/logs/homeserver.log
|
|
when: midnight
|
|
backupCount: 3 # Does not include the current log file.
|
|
encoding: utf8
|
|
|
|
loggers:
|
|
synapse:
|
|
level: INFO
|
|
handlers: [remote]
|
|
synapse.storage.SQL:
|
|
level: WARNING
|
|
```
|
|
|
|
The above logging config will set Synapse as 'INFO' logging level by default,
|
|
with the SQL layer at 'WARNING', and will log to a file, stored as JSON.
|
|
|
|
It is also possible to configure Synapse to log to a remote endpoint by using the
|
|
`synapse.logging.RemoteHandler` class included with Synapse. It takes the
|
|
following arguments:
|
|
|
|
- `host`: Hostname or IP address of the log aggregator.
|
|
- `port`: Numerical port to contact on the host.
|
|
- `maximum_buffer`: (Optional, defaults to 1000) The maximum buffer size to allow.
|
|
|
|
A remote structured logging configuration looks similar to the following:
|
|
|
|
```yaml
|
|
version: 1
|
|
|
|
formatters:
|
|
structured:
|
|
class: synapse.logging.TerseJsonFormatter
|
|
|
|
handlers:
|
|
remote:
|
|
class: synapse.logging.RemoteHandler
|
|
formatter: structured
|
|
host: 10.1.2.3
|
|
port: 9999
|
|
|
|
loggers:
|
|
synapse:
|
|
level: INFO
|
|
handlers: [remote]
|
|
synapse.storage.SQL:
|
|
level: WARNING
|
|
```
|
|
|
|
The above logging config will set Synapse as 'INFO' logging level by default,
|
|
with the SQL layer at 'WARNING', and will log JSON formatted messages to a
|
|
remote endpoint at 10.1.2.3:9999.
|