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Remove docs for converting a legacy structured logging config. (#12392)

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And update the upgrade notes to point at old versions of the documentation.
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Patrick Cloke 2022-04-06 13:41:14 -04:00 committed by GitHub
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changelog.d/12392.doc Normal file
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Remove documentation for converting a legacy structured logging configuration to the new format.

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docs/structured_logging.md
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@ -78,82 +78,3 @@ loggers:
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.
## Upgrading from legacy structured logging configuration
Versions of Synapse prior to v1.54.0 automatically converted the legacy
structured logging configuration, which was deprecated in v1.23.0, to the standard
library logging configuration.
The following reference can be used to update your configuration. Based on the
drain `type`, we can pick a new handler:
1. For a type of `console`, `console_json`, or `console_json_terse`: a handler
with a class of `logging.StreamHandler` and a `stream` of `ext://sys.stdout`
or `ext://sys.stderr` should be used.
2. For a type of `file` or `file_json`: a handler of `logging.FileHandler` with
a location of the file path should be used.
3. For a type of `network_json_terse`: a handler of `synapse.logging.RemoteHandler`
with the host and port should be used.
Then based on the drain `type` we can pick a new formatter:
1. For a type of `console` or `file` no formatter is necessary.
2. For a type of `console_json` or `file_json`: a formatter of
`synapse.logging.JsonFormatter` should be used.
3. For a type of `console_json_terse` or `network_json_terse`: a formatter of
`synapse.logging.TerseJsonFormatter` should be used.
For each new handler and formatter they should be added to the logging configuration
and then assigned to either a logger or the root logger.
An example legacy configuration:
```yaml
structured: true
loggers:
synapse:
level: INFO
synapse.storage.SQL:
level: WARNING
drains:
console:
type: console
location: stdout
file:
type: file_json
location: homeserver.log
```
Would be converted into a new configuration:
```yaml
version: 1
formatters:
json:
class: synapse.logging.JsonFormatter
handlers:
console:
class: logging.StreamHandler
stream: ext://sys.stdout
file:
class: logging.FileHandler
formatter: json
filename: homeserver.log
loggers:
synapse:
level: INFO
handlers: [console, file]
synapse.storage.SQL:
level: WARNING
```
The new logging configuration is a bit more verbose, but significantly more
flexible. It allows for configuration that were not previously possible, such as
sending plain logs over the network, or using different handlers for different
modules.

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docs/upgrade.md
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@ -160,7 +160,7 @@ please upgrade Mjolnir to version 1.3.2 or later before upgrading Synapse.
This release removes support for the `structured: true` logging configuration
which was deprecated in Synapse v1.23.0. If your logging configuration contains
`structured: true` then it should be modified based on the
[structured logging documentation](structured_logging.md).
[structured logging documentation](https://matrix-org.github.io/synapse/v1.56/structured_logging.html#upgrading-from-legacy-structured-logging-configuration).
# Upgrading to v1.53.0
@ -777,7 +777,7 @@ lock down external access to the Admin API endpoints.
This release deprecates use of the `structured: true` logging
configuration for structured logging. If your logging configuration
contains `structured: true` then it should be modified based on the
[structured logging documentation](structured_logging.md).
[structured logging documentation](https://matrix-org.github.io/synapse/v1.56/structured_logging.html#upgrading-from-legacy-structured-logging-configuration).
The `structured` and `drains` logging options are now deprecated and
should be replaced by standard logging configuration of `handlers` and