Manage derived labels

Create, update, and delete derived labels using Terraform or Chronoctl.

View derived labels

View existing derived labels using Chronoctl.

To view all labels:

chronoctl derived-labels list

To list specific labels using their slugs:

chronoctl derived-labels list --slugs slug_name_1,slug_name_2

Create a derived label

The value_glob is the label pattern being matched. This example matches the patterns:

m3coordinator-read*
m3coordinator-write*
m3coordinator-admin*

These values end with *, which matches any pattern. These patterns display under a single derived label defined by the label_name, which is tier.

You can provide multiple definitions for a value with different value_glob patterns. Chronosphere tries them in order of definition.

This example includes a constructed derived label and a mapping derived label. Both follow the same construction rules.

To create a label with Chronoctl:

Create a YAML file with the desired labels. To generate a templated example resource, run the derived-labels scaffold command:
```
chronoctl derived-labels scaffold
```
You can redirect the output to a file for editing:
```
chronoctl derived-labels scaffold > derived-label.yaml
```
Run this command:
```
chronoctl apply -f derived-label.yml
```

This is an example definition file for Chronoctl.

api_version: v1/config
kind: DerivedLabel
spec:
  name: Test Constructed Label
  slug: test-constructed-label
  label_name: tier
  description: this is a test
  metric_label:
    constructed_label:
      value_definitions:
        - value: read
          filters:
            - name: instance
              value_glob: m3coordinator-read*
        - value: write
          filters:
            - name: instance
              value_glob: m3coordinator-write*
---
api_version: v1/config
kind: DerivedLabel
spec:
  name: Test Mapping Label
  slug: test-mapping-label
  label_name: chronosphere_service
  description: this is a test
  metric_label:
    mapping_label:
      name_mappings:
        - filters:
            - name: __name__
              value_glob: grpc_*
          source_label: grpc_service
        - filters:
            - name: __name__
              value_glob: envoy_*
          source_label: backend_service

Delete a derived label

Delete a derived label with Chronoctl by using the chronoctl derived-labels delete command, specifying the slug of the derived label to delete.

For example, to delete the derived label with slug slug_name_1:

chronoctl derived-labels delete slug_name_1

Query derived labels Value mapping