doc: add more test example

Author: xuan-cao-swi

opentelemetry-auto-instrumentation/README.md

@@ -33,6 +33,7 @@ opentelemetry-helpers-sql-obfuscation
 opentelemetry-resource-detector-google_cloud_platform
 opentelemetry-resource-detector-azure
 opentelemetry-resource-detector-container
+opentelemetry-resource-detector-aws
 ```
 
 ### Example installation strategies

opentelemetry-auto-instrumentation/example/README.md

@@ -0,0 +1,39 @@
+# Example
+
+## Installation
+
+Install opentelemetry-auto-instrumentation through `gem install`
+Then `bundle install`
+
+
+## Simple Example (simple-example)
+
+```bash
+OTEL_RUBY_REQUIRE_BUNDLER=true  OTEL_TRACES_EXPORTER=console RUBYOPT="-r opentelemetry-auto-instrumentation" OTEL_RUBY_OPERATOR=false ruby app.rb
+```
+
+## Rails Example (rails-example)
+
+Without auto-instrumentation
+```bash
+bundle exec rackup config.ru
+```
+
+In other terminal make the request call
+```bash
+wget http://localhost:9292
+# or curl http://localhost:9292 if you have curl on system
+```
+
+With auto-instrumentation
+```bash
+OTEL_RUBY_REQUIRE_BUNDLER=false  OTEL_TRACES_EXPORTER=console RUBYOPT="-r opentelemetry-auto-instrumentation" OTEL_RUBY_OPERATOR=false bundle exec rackup config.ru
+```
+
+The load sequence must be opentelemetry-auto-instrumentation -> user library -> bundler.require (initialize otel sdk and instrumentation installation)
+
+In other terminal make the request call
+```bash
+wget http://localhost:9292
+# or curl http://localhost:9292 if you have curl on system
+```

opentelemetry-auto-instrumentation/example/rails-example/Gemfile

@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+# Gemfile
+source 'https://rubygems.org'
+
+gem 'rails'
+gem 'rack'
+gem 'rake', '13.0.6'
+gem 'bigdecimal', '3.1.3'
+gem 'logger', '1.5.3'
+gem 'webrick'

opentelemetry-auto-instrumentation/example/rails-example/app.rb

@@ -0,0 +1,47 @@
+# frozen_string_literal: true
+
+# Copyright The OpenTelemetry Authors
+#
+# SPDX-License-Identifier: Apache-2.0
+
+require 'rails'
+require 'action_controller/railtie'
+
+require 'bundler'
+Bundler.require
+
+# MyApp
+class MyApp < Rails::Application
+  config.secret_key_base = 'your_secret_key_here'
+  config.eager_load = false
+  config.logger = Logger.new($stdout)
+  config.api_only = true
+  config.active_support.to_time_preserves_timezone = :zone
+
+  routes.draw do
+    get '/', to: 'application#index'
+    get '/hello', to: 'application#hello'
+    post '/data', to: 'application#create'
+  end
+end
+
+# ApplicationController
+class ApplicationController < ActionController::API
+  def index
+    render json: { message: 'Hello World!', time: Time.current }
+  end
+
+  def hello
+    name = params[:name] || 'World'
+    render json: { greeting: "Hello #{name}!" }
+  end
+
+  def create
+    render json: {
+      message: 'Data received',
+      data: params.except(:controller, :action)
+    }
+  end
+end
+
+MyApp.initialize!

opentelemetry-auto-instrumentation/example/rails-example/config.ru

@@ -0,0 +1,5 @@
+# frozen_string_literal: true
+
+require_relative 'app'
+
+run MyApp

opentelemetry-auto-instrumentation/example/Gemfile renamed to opentelemetry-auto-instrumentation/example/simple-example/Gemfile

@@ -1,2 +1,3 @@
-source 'https://rubygems.org'
+# frozen_string_literal: true
 
+source 'https://rubygems.org'

opentelemetry-auto-instrumentation/example/app.rb renamed to opentelemetry-auto-instrumentation/example/simple-example/app.rb

@@ -4,8 +4,8 @@
 #
 # SPDX-License-Identifier: Apache-2.0
 
-url = URI.parse("http://catfact.ninja/fact")
+url = URI.parse('http://catfact.ninja/fact')
 req = Net::HTTP::Get.new(url.to_s)
-res = Net::HTTP.start(url.host, url.port) {|http|
+Net::HTTP.start(url.host, url.port) do |http|
   http.request(req)
-}
+end

opentelemetry-auto-instrumentation/lib/opentelemetry-auto-instrumentation.rb

@@ -118,7 +118,7 @@ def require(...)
 
 # set OTEL_OPERATOR to false if not in autoinstrumentation-ruby image, default to /otel-auto-instrumentation-ruby
 # /otel-auto-instrumentation-ruby is set in opentelemetry-operator ruby.go
-operator_gem_path = ENV['OTEL_RUBY_OPERATOR'].nil? || ENV['OTEL_RUBY_OPERATOR'] == 'true' ? '/otel-auto-instrumentation-ruby' : nil
+operator_gem_path = ENV['OTEL_RUBY_OPERATOR'] == 'true' ? '/otel-auto-instrumentation-ruby' : nil
 additional_gem_path = operator_gem_path || ENV['OTEL_RUBY_ADDITIONAL_GEM_PATH'] || Gem.dir
 $stdout.puts "Loading the additional gem path from #{additional_gem_path}" if ENV['OTEL_RUBY_AUTO_INSTRUMENTATION_DEBUG'] == 'true'