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Documentation Grafana Alloy Reference Components otelcol otelcol.receiver.opencensus

otelcol.receiver.opencensus

otelcol.receiver.opencensus accepts telemetry data via gRPC or HTTP using the OpenCensus format and forwards it to other otelcol.* components.

NOTE: otelcol.receiver.opencensus is a wrapper over the upstream OpenTelemetry Collector opencensus receiver from the otelcol-contrib distribution. Bug reports or feature requests will be redirected to the upstream repository, if necessary.

Multiple otelcol.receiver.opencensus components can be specified by giving them different labels.

Usage

Alloy Copy

otelcol.receiver.opencensus "LABEL" {
  output {
    metrics = [...]
    logs    = [...]
    traces  = [...]
  }
}

Arguments

otelcol.receiver.opencensus supports the following arguments:

cors_allowed_origins are the allowed CORS origins for HTTP/JSON requests. An empty list means that CORS is not enabled at all. A wildcard (*) can be used to match any origin or one or more characters of an origin.

The “endpoint” parameter is the same for both gRPC and HTTP/JSON, as the protocol is recognized and processed accordingly.

To write traces with HTTP/JSON, POST to [address]/v1/trace. The JSON message format parallels the gRPC protobuf format. For details, refer to its OpenApi specification.

Note that max_recv_msg_size, read_buffer_size and write_buffer_size are formatted in a way so that the units are included in the string, such as “512KiB” or “1024KB”.

Blocks

The following blocks are supported inside the definition of otelcol.receiver.opencensus:

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

tls block

The tls block configures TLS settings used for a server. If the tls block isn’t provided, TLS won’t be used for connections to the server.

keepalive block

The keepalive block configures keepalive settings for connections to a gRPC server.

keepalive doesn’t support any arguments and is configured fully through inner blocks.

server_parameters block

The server_parameters block controls keepalive and maximum age settings for gRPC servers.

The following arguments are supported:

enforcement_policy block

The enforcement_policy block configures the keepalive enforcement policy for gRPC servers. The server will close connections from clients that violate the configured policy.

The following arguments are supported:

debug_metrics block

output block

Exported fields

otelcol.receiver.opencensus does not export any fields.

Component health

otelcol.receiver.opencensus is only reported as unhealthy if given an invalid configuration.

Debug information

otelcol.receiver.opencensus does not expose any component-specific debug information.

Example

This example forwards received telemetry data through a batch processor before finally sending it to an OTLP-capable endpoint:

Alloy Copy

otelcol.receiver.opencensus "default" {
    cors_allowed_origins = ["https://*.test.com", "https://test.com"]

    endpoint  = "0.0.0.0:9090"
    transport = "tcp"

    max_recv_msg_size      = "32KB"
    max_concurrent_streams = "16"
    read_buffer_size       = "1024KB"
    write_buffer_size      = "1024KB"
    include_metadata       = true

    tls {
        cert_file = "test.crt"
        key_file  = "test.key"
    }

    keepalive {
        server_parameters {
            max_connection_idle      = "11s"
            max_connection_age       = "12s"
            max_connection_age_grace = "13s"
            time                     = "30s"
            timeout                  = "5s"
        }

        enforcement_policy {
            min_time              = "10s"
            permit_without_stream = true
        }
    }

    output {
        metrics = [otelcol.processor.batch.default.input]
        logs    = [otelcol.processor.batch.default.input]
        traces  = [otelcol.processor.batch.default.input]
    }
}

otelcol.processor.batch "default" {
    output {
        metrics = [otelcol.exporter.otlp.default.input]
        logs    = [otelcol.exporter.otlp.default.input]
        traces  = [otelcol.exporter.otlp.default.input]
    }
}

otelcol.exporter.otlp "default" {
    client {
        endpoint = env("OTLP_ENDPOINT")
    }
}

Compatible components

otelcol.receiver.opencensus can accept arguments from the following components:

• Components that export OpenTelemetry otelcol.Consumer