otlpreceiver

README

OpenTelemetry Receiver

Receives traces and/or metrics via gRPC using OpenTelemetry format.

To get started, all that is required to enable the OpenTelemetry receiver is to include it in the receiver definitions.

The following settings are required:

• endpoint (default = 0.0.0.0:55680): host:port to which the exporter is going to receive traces or metrics, using the gRPC protocol. The valid syntax is described at https://github.com/grpc/grpc/blob/master/doc/naming.md.
• transport (default = tcp): which transport to use between tcp and unix.

The following settings are optional:

• cors_allowed_origins (default = unset): allowed CORS origins for HTTP/JSON requests. See the HTTP/JSON section below.
• keepalive: see https://godoc.org/google.golang.org/grpc/keepalive#ServerParameters for more information
  • MaxConnectionIdle (default = infinity)
  • MaxConnectionAge (default = infinity)
  • MaxConnectionAgeGrace (default = infinity)
  • Time (default = 2h)
  • Timeout (default = 20s)
• max_recv_msg_size_mib (default = infinity): sets the maximum size of messages accepted
• max_concurrent_streams: sets the limit on the number of concurrent streams
• tls_credentials (default = unset): configures the receiver to use TLS. See TLS section below.

Examples:

receivers:
  otlp:
    protocols:
        grpc:
  otlp/withendpoint:
    protocols:
        grpc:
            endpoint: 127.0.0.1:55680

The full list of settings exposed for this receiver are documented here with detailed sample configurations here.

A protocol can be disabled by simply not specifying it in the list of protocols:

receivers:
  otlp/only_grpc:
    protocols:
      grpc:

Communicating over TLS

This receiver supports communication using Transport Layer Security (TLS). TLS can be configured by specifying a tls_settings object in the receiver configuration for receivers that support it.

receivers:
  otlp:
    protocols:
      grpc:
        tls_settings:
          key_file: /key.pem # path to private key
          cert_file: /cert.pem # path to certificate

Writing with HTTP/JSON

The OpenTelemetry receiver can receive trace export calls via HTTP/JSON in addition to gRPC. The HTTP/JSON address is the same as gRPC as the protocol is recognized and processed accordingly. Note the format needs to be protobuf JSON serialization.

IMPORTANT: bytes fields are encoded as base64 strings.

To write traces with HTTP/JSON, POST to [address]/v1/trace.

The HTTP/JSON endpoint can also optionally configure CORS, which is enabled by specifying a list of allowed CORS origins in the cors_allowed_origins field:

receivers:
  otlp:
    protocols:
      http:
        endpoint: "localhost:55681"
        cors_allowed_origins:
        - http://test.com
        # Origins can have wildcards with *, use * by itself to match any origin.
        - https://*.example.com

Documentation

Index

• func NewFactory() component.ReceiverFactory
• type Config
• type Protocols
• type Receiver
  • func New(cfg *Config) (*Receiver, error)
  • func (r *Receiver) Shutdown(context.Context) error
  • func (r *Receiver) Start(ctx context.Context, host component.Host) error

Functions

func NewFactory

func NewFactory() component.ReceiverFactory

Types

type Config

type Config struct {
	configmodels.ReceiverSettings `mapstructure:",squash"` // squash ensures fields are correctly decoded in embedded struct

	// Protocols is the configuration for the supported protocols, currently gRPC and HTTP (Proto and JSON).
	Protocols `mapstructure:"protocols"`
}

Config defines configuration for OTLP receiver.

type Protocols

type Protocols struct {
	GRPC *configgrpc.GRPCServerSettings `mapstructure:"grpc"`
	HTTP *confighttp.HTTPServerSettings `mapstructure:"http"`
}

type Receiver

type Receiver struct {
	// contains filtered or unexported fields
}

Receiver is the type that exposes Trace and Metrics reception.

func New

func New(cfg *Config) (*Receiver, error)

New just creates the OpenTelemetry receiver services. It is the caller's responsibility to invoke the respective Start*Reception methods as well as the various Stop*Reception methods to end it.

func (*Receiver) Shutdown

func (r *Receiver) Shutdown(context.Context) error

Shutdown is a method to turn off receiving.

func (*Receiver) Start

func (r *Receiver) Start(ctx context.Context, host component.Host) error

Start runs the trace receiver on the gRPC server. Currently it also enables the metrics receiver too.