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Document wildcards in attributes.select #996

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Jul 9, 2024
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Document wildcards in attributes.select #996

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Document wildcards in attributes.select
mariomac Jul 4, 2024
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grafsean Jul 9, 2024
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24 changes: 24 additions & 0 deletions docs/sources/configure/options.md
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Expand Up @@ -502,6 +502,30 @@ attributes:
exclude: ["k8s.pod.*"]
```

Additionally, you can use "`*`" wildcards as metric names to add and exclude attributes for
groups of metrics having the same name. For example:

```yaml
attributes:
select:
http_*:
include: ["*"]
exclude: ["http_path", "http_route"]
http_client_*:
# override http_* exclusion
include: ["http_path"]
http_server_*:
# override http_* exclusion
include: ["http_route"]
```

In the previous example, all the metrics with a name starting with `http_` (or `http.`) would include all
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the possible attributes but `http_path` and `http_route` (or `http.path`/`http.route`).
The `http_client_*` and `http_server_*` sections would override the base configuration, enabling the
`http_path` attribute for the HTTP client metrics and `http_route` for the HTTP server metrics.

When a metric name matches multiple definitions using wildcards, exact matches have higher precedence than wild card matches.

### Instance ID decoration

The metrics and the traces are decorated with a unique instance ID string, identifying
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