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Documentation Grafana Alloy Reference Components otelcol otelcol.connector.host_info

otelcol.connector.host_info

otel.connector.host_info accepts span data from other otelcol components and generates usage metrics.

Usage

alloy Copy

otelcol.connector.host_info "LABEL" {
  output {
    metrics = [...]
  }
}

Arguments

otelcol.connector.host_info supports the following arguments:

Blocks

The following blocks are supported inside the definition of otelcol.connector.host_info:

output block

The output block configures a set of components to forward resulting telemetry data to.

The following arguments are supported:

You must specify the output block, but all its arguments are optional. By default, telemetry data is dropped. Configure the metrics argument accordingly to send telemetry data to other components.

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 traces telemetry data. It does not accept metrics and logs.

Example

The example below accepts traces, adds the host.id resource attribute via the otelcol.processor.resourcedetection component, creates usage metrics from these traces, and writes the metrics to Mimir.

alloy Copy

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

  output {
    traces = [otelcol.processor.resourcedetection.otlp_resources.input]
  }
}

otelcol.processor.resourcedetection "otlp_resources" {
  detectors = ["system"]
  system {
    hostname_sources = [ "os" ]
    resource_attributes {
      host.id {
        enabled = true
      }
    }
  }
  output {
    traces = [otelcol.connector.host_info.default.input]
  }
}

otelcol.connector.host_info "default" {
  output {
    metrics = [otelcol.exporter.prometheus.otlp_metrics.input]
  }
}

otelcol.exporter.prometheus "otlp_metrics" {
  forward_to = [prometheus.remote_write.default.receiver]
}

prometheus.remote_write "default" {
  endpoint {
    url = "https://prometheus-xxx.grafana.net/api/prom/push"
    basic_auth {
      username = sys.env("PROMETHEUS_USERNAME")
      password = sys.env("GRAFANA_CLOUD_API_KEY")
    }
  }
}

Compatible components

otelcol.connector.host_info can accept arguments from the following components:

• Components that export OpenTelemetry otelcol.Consumer

otelcol.connector.host_info has exports that can be consumed by the following components:

• Components that consume OpenTelemetry otelcol.Consumer