Set up Ruby applications

The Ruby onboarding setup sends traces. For log files from a Ruby application, use Send server log files. Traces require the APM add-on for storage and viewing.

Install packages

bundle add opentelemetry-sdk opentelemetry-exporter-otlp opentelemetry-instrumentation-all

Configure the process

Save this as .env, replacing the stack ID and service name:

OTEL_SERVICE_NAME="my-app"
OTEL_EXPORTER_OTLP_ENDPOINT="https://{stackId}-otel.logit.io"
OTEL_EXPORTER_OTLP_PROTOCOL="http/protobuf"
OTEL_TRACES_EXPORTER="otlp"

Load the environment file, then build authentication and set the standard SDK header. Use the base HTTPS endpoint; the exporter appends /v1/traces.

Initialize instrumentation

For Rails, put this in config/initializers/opentelemetry.rb. In other Ruby apps, load it as early as possible:

require 'opentelemetry/sdk'
require 'opentelemetry/instrumentation/all'
 
OpenTelemetry::SDK.configure do |c|
  c.use_all()
end

The service name comes from OTEL_SERVICE_NAME. Start your app from the configured environment, generate requests, then check the result.

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