OpenTelemetry

An output plugin to submit Logs, Metrics, or Traces to an OpenTelemetry endpoint

The OpenTelemetry plugin allows you to take logs, metrics, and traces from Fluent Bit and submit them to an OpenTelemetry HTTP endpoint.

Important Note: At the moment only HTTP endpoints are supported.

KeyDescriptionDefault

host

IP address or hostname of the target HTTP Server

127.0.0.1

http_user

Basic Auth Username

http_passwd

Basic Auth Password. Requires HTTP_user to be set

port

TCP port of the target HTTP Server

80

proxy

Specify an HTTP Proxy. The expected format of this value is http://HOST:PORT. Note that HTTPS is not currently supported. It is recommended not to set this and to configure the HTTP proxy environment variables instead as they support both HTTP and HTTPS.

http2

Defines whether HTTP/2 protocol is enabled. This setting also supports the force option, which forces HTTP/2 over a plaintext connection.

On

grpc

Enables gRPC over an HTTP/2 connection. This setting applies to HTTP/2 only.

off

metrics_uri

Specify an optional HTTP URI for the target web server listening for metrics, e.g: /v1/metrics

/

logs_uri

Specify an optional HTTP URI for the target web server listening for logs, e.g: /v1/logs

/

traces_uri

Specify an optional HTTP URI for the target web server listening for traces, e.g: /v1/traces

/

header

Add a HTTP header key/value pair. Multiple headers can be set.

log_response_payload

Log the response payload within the Fluent Bit log

false

logs_body_key

The log body key to look up in the log events body/message. Sets the Body field of the opentelemtry logs data model.

message

logs_trace_id_message_key

The trace id key to look up in the log events body/message. Sets the TraceId field of the opentelemtry logs data model.

traceId

logs_span_id_message_key

The span id key to look up in the log events body/message. Sets the SpanId field of the opentelemtry logs data model.

spanId

logs_severity_text_message_key

The severity text id key to look up in the log events body/message. Sets the SeverityText field of the opentelemtry logs data model.

severityText

logs_severity_number_message_key

The severity number id key to look up in the log events body/message. Sets the SeverityNumber field of the opentelemtry logs data model.

severityNumber

add_label

This allows you to add custom labels to all metrics exposed through the OpenTelemetry exporter. You may have multiple of these fields

compress

Set payload compression mechanism. Option available is 'gzip'

logs_observed_timestamp_metadata_key

Specify an ObservedTimestamp key to look up in the metadata.

$ObservedKey

logs_timestamp_metadata_key

Specify a Timestamp key to look up in the metadata.

$Timestamp

logs_severity_key_metadata_key

Specify a SeverityText key to look up in the metadata.

$SeverityText

logs_severity_number_metadata_key

Specify a SeverityNumber key to look up in the metadata.

$SeverityNumber

logs_trace_flags_metadata_key

Specify a Flags key to look up in the metadata.

$Flags

logs_span_id_metadata_key

Specify a SpanId key to look up in the metadata.

$SpanId

logs_trace_id_metadata_key

Specify a TraceId key to look up in the metadata.

$TraceId

logs_attributes_metadata_key

Specify an Attributes key to look up in the metadata.

$Attributes

workers

The number of workers to perform flush operations for this output.

0

Getting Started

The OpenTelemetry plugin works with logs and only the metrics collected from one of the metric input plugins. In the following example, log records generated by the dummy plugin and the host metrics collected by the node exporter metrics plugin are exported by the OpenTelemetry output plugin.

# Dummy Logs & traces with Node Exporter Metrics export using OpenTelemetry output plugin
# -------------------------------------------
# The following example collects host metrics on Linux and dummy logs & traces and delivers
# them through the OpenTelemetry plugin to a local collector :
#
[SERVICE]
    Flush                1
    Log_level            info

[INPUT]
    Name                 node_exporter_metrics
    Tag                  node_metrics
    Scrape_interval      2

[INPUT]
    Name                 dummy
    Tag                  dummy.log
    Rate                 3

[INPUT]
    Name                 event_type
    Type                 traces

[OUTPUT]
    Name                 opentelemetry
    Match                *
    Host                 localhost
    Port                 443
    Metrics_uri          /v1/metrics
    Logs_uri             /v1/logs
    Traces_uri           /v1/traces
    Log_response_payload True
    Tls                  On
    Tls.verify           Off
    logs_body_key $message
    logs_span_id_message_key span_id
    logs_trace_id_message_key trace_id
    logs_severity_text_message_key loglevel
    logs_severity_number_message_key lognum
    # add user-defined labels
    add_label            app fluent-bit
    add_label            color blue

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