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Loki: Allow regex in label derived field (#96609)

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* Loki: Allow regex in `label` derived field

* add docs

* change to caution
This commit is contained in:
Sven Grossmann
2024-11-19 21:01:56 +02:00
committed by GitHub
parent 8527f986db
commit 51efde972b
3 changed files with 35 additions and 6 deletions
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docs/sources/datasources/loki/configure-loki-data-source.md
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@@ -114,9 +114,13 @@ Each derived field consists of the following:
- **Type** - Defines the type of the derived field. It can be either:
- **Regex**: A regular expression to parse a part of the log message and capture it as the value of the new field. Can contain only one capture group.
{{% admonition type="caution" %}}
Using complex regular expressions in either type can impact browser performance when processing large volumes of logs. Consider using simpler patterns when possible.
{{% /admonition %}}
- **Label**: A label from the selected log line. This can be any type of label - indexed, parsed or structured metadata. The label's value will be used as the value of the derived field.
- **Regex**: A regular expression to parse a part of the log message and capture it as the value of the new field. Can contain only one capture group.
- **Label**: A label from the selected log line. This can be any type of label - indexed, parsed or structured metadata. When using this type, the input will match as a regular expression against label keys, allowing you to match variations like `traceid` and `trace_id` with a single regex pattern like `trace[_]?id`. The value of the matched label will be used as the value of the derived field.
- **URL/query** Sets the full link URL if the link is external, or a query for the target data source if the link is internal. You can interpolate the value from the field with the `${__value.raw}` macro.