Module: LanguageOperator::Agent::Telemetry

Defined in:
lib/language_operator/agent/telemetry.rb

Overview

OpenTelemetry configuration for agent runtime

Initializes distributed tracing and telemetry for language operator agents. Reads configuration from environment variables and gracefully handles errors.

Examples:

Configure telemetry

LanguageOperator::Agent::Telemetry.configure

Class Method Summary collapse

Class Method Details

.configure ⇒ void

This method returns an undefined value.

Configure OpenTelemetry for the agent

Reads configuration from environment variables:

  • OTEL_EXPORTER_OTLP_ENDPOINT: OTLP endpoint URL (required)
  • TRACEPARENT: W3C trace context for distributed tracing
  • AGENT_NAMESPACE: Kubernetes namespace
  • AGENT_NAME: Agent name
  • AGENT_MODE: Agent operating mode
  • HOSTNAME: Pod hostname


28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
 
# File 'lib/language_operator/agent/telemetry.rb', line 28

def configure
  return unless ENV.fetch('OTEL_EXPORTER_OTLP_ENDPOINT', nil)

  # Configure custom error handler for detailed logging
  OpenTelemetry.error_handler = lambda do |exception: nil, message: nil|
    if exception
      warn "OpenTelemetry error: #{message} - #{exception.class}: #{exception.message}"
      warn exception.backtrace.first(5).join("\n") if exception.backtrace
    else
      warn "OpenTelemetry error: #{message}"
    end
  end

  # Initialize OpenTelemetry SDK with OTLP exporter
  # Uses environment variables set by the operator:
  # - OTEL_EXPORTER_OTLP_ENDPOINT: http://host:port
  # - OTEL_SERVICE_NAME: service name
  OpenTelemetry::SDK.configure do |c|
    c.service_name = ENV.fetch('OTEL_SERVICE_NAME', 'language-operator-agent')

    # Add resource attributes
    c.resource = OpenTelemetry::SDK::Resources::Resource.create(build_resource_attributes)

    # Use OTLP HTTP exporter (reads endpoint from OTEL_EXPORTER_OTLP_ENDPOINT env var)
    c.add_span_processor(
      OpenTelemetry::SDK::Trace::Export::BatchSpanProcessor.new(
        OpenTelemetry::Exporter::OTLP::Exporter.new(
          endpoint: "#{ENV.fetch('OTEL_EXPORTER_OTLP_ENDPOINT')}/v1/traces",
          headers: {}
        )
      )
    )
  end

  # Restore trace context from TRACEPARENT if present for distributed tracing
  restore_trace_context if ENV['TRACEPARENT']
rescue StandardError => e
  warn "Failed to configure OpenTelemetry: #{e.message}"
  warn e.backtrace.join("\n")
end