# frozen_string_literal: true # Set OTEL_* environment variables according to OTel docs: # https://opentelemetry.io/docs/concepts/sdk-configuration/ if ENV.keys.any? { |name| name.match?(/OTEL_.*_ENDPOINT/) } require 'opentelemetry/sdk' require 'opentelemetry/exporter/otlp' require 'opentelemetry/instrumentation/active_job' require 'opentelemetry/instrumentation/active_model_serializers' require 'opentelemetry/instrumentation/concurrent_ruby' require 'opentelemetry/instrumentation/excon' require 'opentelemetry/instrumentation/faraday' require 'opentelemetry/instrumentation/http' require 'opentelemetry/instrumentation/http_client' require 'opentelemetry/instrumentation/net/http' require 'opentelemetry/instrumentation/pg' require 'opentelemetry/instrumentation/rack' require 'opentelemetry/instrumentation/rails' require 'opentelemetry/instrumentation/redis' require 'opentelemetry/instrumentation/sidekiq' OpenTelemetry::SDK.configure do |c| # use_all() attempts to load ALL the auto-instrumentations # currently loaded by Ruby requires. # # Load attempts will emit an INFO or WARN to the console # about the success/failure to wire up an auto-instrumentation. # "WARN -- : Instrumentation: <X> failed to install" is most # likely caused by <X> not being a Ruby library loaded by # the application or the instrumentation has been explicitly # disabled. # # To disable an instrumentation, set an environment variable # along this pattern: # # OTEL_RUBY_INSTRUMENTATION_<X>_ENABLED=false # # For example, PostgreSQL and Redis produce a lot of child spans # in the course of this application doing its business. To turn # them off, set the env vars below, but recognize that you will # be missing details about what particular calls to the # datastores are slow. # # OTEL_RUBY_INSTRUMENTATION_PG_ENABLED=false # OTEL_RUBY_INSTRUMENTATION_REDIS_ENABLED=false c.use_all({ 'OpenTelemetry::Instrumentation::Rack' => { use_rack_events: false, # instead of events, use middleware; allows for untraced_endpoints to ignore child spans untraced_endpoints: ['/health'], }, 'OpenTelemetry::Instrumentation::Sidekiq' => { span_naming: :job_class, # Use the job class as the span name, otherwise this is the queue name and not very helpful }, }) prefix = ENV.fetch('OTEL_SERVICE_NAME_PREFIX', 'mastodon') c.service_name = case $PROGRAM_NAME when /puma/ then "#{prefix}/web" else "#{prefix}/#{$PROGRAM_NAME.split('/').last}" end c.service_version = Mastodon::Version.to_s end end MastodonOTELTracer = OpenTelemetry.tracer_provider.tracer('mastodon')