Ingesting logs to Loki using OpenTelemetry Collector

{{< docs/shared source="loki" lookup="otel.md" version="<LOKI_VERSION>">}}

Here are some example configs to change the default mapping of OTLP to Loki format:

Example 1

limits_config:
  otlp_config:
    resource_attributes:
      attributes_config:
        - action: index_label
          attributes:
            - service.group

With the example config, here is how various kinds of Attributes would be stored:

• Store all 17 Resource Attributes mentioned earlier and service.group Resource Attribute as index labels.
• Store remaining Resource Attributes as Structured Metadata.
• Store all the Scope and Log Attributes as Structured Metadata.

Example 2

limits_config:
  otlp_config:
    resource_attributes:
      ignore_defaults: true
      attributes_config:
        - action: index_label
          regex: service.group

With the example config, here is how various kinds of Attributes would be stored:

• Only store service.group Resource Attribute as index labels.
• Store remaining Resource Attributes as Structured Metadata.
• Store all the Scope and Log Attributes as Structured Metadata.

Example 3

limits_config:
  otlp_config:
    resource_attributes:
      attributes_config:
        - action: index_label
          regex: service.group
    scope_attributes:
      - action: drop
        attributes:
          - method.name
    log_attributes:
      - action: structured_metadata
        attributes:
          - user.id
      - action: drop
        regex: .*

With the example config, here is how various kinds of Attributes would be stored:

• Store all 17 Resource Attributes mentioned earlier and service.group Resource Attribute as index labels.
• Store remaining Resource Attributes as Structured Metadata.
• Drop Scope Attribute named method.name and store all other Scope Attributes as Structured Metadata.
• Store Log Attribute named user.id as Structured Metadata and drop all other Log Attributes.