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Documentation Grafana Alloy Reference Components otelcol otelcol.exporter.logging

otelcol.exporter.logging

otelcol.exporter.logging accepts telemetry data from other otelcol components and writes them to the console.

This component writes logs at the info level. The logging config block must be configured to write logs at the info level.

Multiple otelcol.exporter.logging components can be specified by giving them different labels.

Usage

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otelcol.exporter.logging "LABEL" { }

Arguments

otelcol.exporter.logging supports the following arguments:

The verbosity argument must be one of "basic", "normal", or "detailed".

Blocks

The following blocks are supported inside the definition of otelcol.exporter.logging:

The > symbol indicates deeper levels of nesting. For example, client > tls refers to a tls block defined inside a client block.

debug_metrics block

The debug_metrics block configures the metrics that this component generates to monitor its state.

The following arguments are supported:

disable_high_cardinality_metrics is the Grafana Alloy equivalent to the telemetry.disableHighCardinalityMetrics feature gate in the OpenTelemetry Collector. It removes attributes that could cause high cardinality metrics. For example, attributes with IP addresses and port numbers in metrics about HTTP and gRPC connections are removed.

level is the Alloy equivalent to the telemetry.metrics.level feature gate in the OpenTelemetry Collector. Possible values are "none", "basic", "normal" and "detailed".

Exported fields

The following fields are exported and can be referenced by other components:

input accepts otelcol.Consumer data for any telemetry signal (metrics, logs, or traces).

Component health

otelcol.exporter.logging is only reported as unhealthy if given an invalid configuration.

Debug information

otelcol.exporter.logging does not expose any component-specific debug information.

Example

This example receives OTLP metrics, logs, and traces and writes them to the console:

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otelcol.receiver.otlp "default" {
    grpc {}
    http {}

    output {
        metrics = [otelcol.exporter.logging.default.input]
        logs    = [otelcol.exporter.logging.default.input]
        traces  = [otelcol.exporter.logging.default.input]
    }
}

otelcol.exporter.logging "default" {}

Compatible components

otelcol.exporter.logging has exports that can be consumed by the following components:

• Components that consume OpenTelemetry otelcol.Consumer