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document difference between log record formats (#57798) (#58200)

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* document difference between log record formats

* add more
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Mikhail Shustov 2020-02-21 11:30:46 +01:00 • committed by GitHub
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src/core/server/logging/README.md
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@ -7,6 +7,8 @@
- [JSON layout](#json-layout)
- [Configuration](#configuration)
- [Usage](#usage)
- [Logging config migration](#logging-config-migration)
- [Log record format changes](#log-record-format-changes)
The way logging works in Kibana is inspired by `log4j 2` logging framework used by [Elasticsearch](https://www.elastic.co/guide/en/elasticsearch/reference/current/settings.html#logging).
The main idea is to have consistent logging behaviour (configuration, log format etc.) across the entire Elastic Stack
@ -321,3 +323,23 @@ Define a custom logger for a specific context.
#### logging.filter
TBD
### Log record format changes
| Parameter | Platform log record in **pattern** format | Legacy Platform log record **text** format |
| --------------- | ------------------------------------------ | ------------------------------------------ |
| @timestamp | ISO8601 `2012-01-31T23:33:22.011Z` | Absolute `23:33:22.011` |
| context | `parent.child` | `['parent', 'child']` |
| level | `DEBUG` | `['debug']` |
| meta | stringified JSON object `{"to": "v8"}` | N/A |
| pid | can be configured as `%pid` | N/A |
| Parameter | Platform log record in **json** format | Legacy Platform log record **json** format |
| --------------- | ------------------------------------------ | -------------------------------------------- |
| @timestamp | ISO8601_TZ `2012-01-31T23:33:22.011-05:00` | ISO8601 `2012-01-31T23:33:22.011Z` |
| context | `context: parent.child` | `tags: ['parent', 'child']` |
| level | `level: DEBUG` | `tags: ['debug']` |
| meta | separate property `"meta": {"to": "v8"}` | merged in log record `{... "to": "v8"}` |
| pid | `pid: 12345` | `pid: 12345` |
| type | N/A | `type: log` |
| error | `{ message, name, stack }` | `{ message, name, stack, code, signal }` |