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[chore][processor/transform] add configuration example for copying attributes matching regex #35893

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Oct 22, 2024
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[chore][processor/transform] add configuration example for copying attributes matching regex #35893

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[chore][processor/transform] add configuration example for copying at…
odubajDT Oct 21, 2024
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Merge branch 'main' into transform-docs
odubajDT Oct 22, 2024
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Update processor/transformprocessor/README.md
evan-bradley Oct 22, 2024
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18 changes: 18 additions & 0 deletions processor/transformprocessor/README.md
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Expand Up @@ -666,6 +666,24 @@ transform:
- set(severity_number, SEVERITY_NUMBER_ERROR) where IsString(body) and IsMatch(body, "\\sERROR\\s")
```

## Copy attributes matching regular expression to a separate location

If you want to move resource attributes, which keys are matching the regular expression `pod_labels_.*` to a new attribute
location `kubernetes,labels`, use the following configuration:
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```yaml
transform:
error_mode: ignore
trace_statements:
- context: resource
statements:
- set(cache["attrs"], attributes)
- keep_matching_keys(cache["attrs"], "pod_labels_.*")
- set(attributes["kubernetes.labels"], cache["attrs"])
```

The configuration can be used also with `delete_matching_keys()` to copy the attributes that do not match the regular expression.

## Troubleshooting

When using OTTL you can enable debug logging in the collector to print out useful information,
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