server.address

.env

@@ -21,7 +21,7 @@ TEST_MEMCACHED_PORT=11211
 TEST_MONGODB_HOST=127.0.0.1
 TEST_MONGODB_PORT=27017
 TEST_MYSQL_DB=mysql
-TEST_MYSQL_HOST=127.0.0.1
+TEST_MYSQL_HOST=localhost
 TEST_MYSQL_PASSWORD=mysql
 TEST_MYSQL_PORT=3306
 TEST_MYSQL_ROOT_PASSWORD=root

.rspec

@@ -1 +1,2 @@
 --require spec_helper
+--backtrace

Gemfile

@@ -93,3 +93,22 @@ end
 #
 # TODO: Remove this once the issue is resolved: https://github.com/ffi/ffi/issues/1107
 gem 'ffi', '~> 1.16.3', require: false
+
+gem 'mongo', '>= 2.8.0', '< 2.15.0' # TODO: FIX TEST BREAKAGES ON >= 2.15 https://github.com/DataDog/dd-trace-rb/issues/1596
+
+gem 'rails', '~> 6'
+gem 'mysql2'
+gem 'trilogy'
+gem 'pg'
+gem 'dalli'
+gem 'elasticsearch'
+
+gem 'ethon'
+gem 'excon'
+gem 'faraday'
+gem 'http'
+gem 'httpclient'
+gem 'rest-client'
+gem 'stripe', '~> 7.0'
+gem 'typhoeus'
+gem 'redis'

lib/datadog/tracing/contrib/propagation/sql_comment.rb

@@ -52,7 +52,7 @@ def self.prepend_comment(sql, span_op, trace_op, mode)
               end
             end
 
-            "#{Comment.new(tags)} #{sql}"
+            "#{sql} #{Comment.new(tags)}"
           end
 
           def self.datadog_configuration

lib/datadog/tracing/metadata/ext.rb

@@ -22,6 +22,13 @@ module Ext
         # Name of external service that performed the work
         TAG_PEER_SERVICE = 'peer.service'
 
+        # The server domain name that the network client is talking to,
+        # before DNS resolution (e.g. what the user provided in the client's initializer/configuration);
+        # otherwise, IP address or Unix domain socket name.
+        #
+        # @see https://opentelemetry.io/docs/specs/semconv/general/attributes/#server-attributes
+        TAG_SERVER_ADDRESS = 'server.address'
+
         TAG_KIND = 'span.kind'
 
         # Set this tag to `1.0` if the span is a Service Entry span.

spec/datadog/tracing/contrib/active_record/multi_db_spec.rb

@@ -70,7 +70,7 @@
   let(:mysql) do
     {
       database: ENV.fetch('TEST_MYSQL_DB', 'mysql'),
-      host: ENV.fetch('TEST_MYSQL_HOST', '127.0.0.1'),
+      host: ENV.fetch('TEST_MYSQL_HOST', 'localhost'),
       password: ENV.fetch('TEST_MYSQL_ROOT_PASSWORD', 'root'),
       port: ENV.fetch('TEST_MYSQL_PORT', '3306')
     }

spec/datadog/tracing/contrib/active_record/tracer_spec.rb

@@ -51,7 +51,9 @@
       expect(span.get_tag('db.instance')).to eq('mysql')
       expect(span.get_tag('active_record.db.name')).to eq('mysql')
       expect(span.get_tag('active_record.db.cached')).to eq(nil)
+      # TODO: MYSQL is correct CONTINUE WITH OTHERS
       expect(span.get_tag('out.host')).to eq(ENV.fetch('TEST_MYSQL_HOST', '127.0.0.1'))
+      expect(span.get_tag('out.host')).to_not be_an_ip_address if PlatformHelpers.ci? # This test is hard to run locally because mysql considers `localhost` as a unix socket
       expect(span.get_tag('out.port')).to eq(ENV.fetch('TEST_MYSQL_PORT', 3306).to_f)
       expect(span.get_tag('sql.query')).to eq(nil)
       expect(span.get_tag(Datadog::Tracing::Metadata::Ext::TAG_COMPONENT)).to eq('active_record')

spec/datadog/tracing/contrib/active_record/utils_spec.rb

@@ -9,7 +9,7 @@
     context 'when connected to mysql' do
       it 'returns `mysql2`' do
         root_pw = ENV.fetch('TEST_MYSQL_ROOT_PASSWORD', 'root')
-        host = ENV.fetch('TEST_MYSQL_HOST', '127.0.0.1')
+        host = ENV.fetch('TEST_MYSQL_HOST', 'localhost')
         port = ENV.fetch('TEST_MYSQL_PORT', '3306')
         db = ENV.fetch('TEST_MYSQL_DB', 'mysql')
 
@@ -23,7 +23,7 @@
   describe 'regression: retrieving database without an active connection does not raise an error' do
     before do
       root_pw = ENV.fetch('TEST_MYSQL_ROOT_PASSWORD', 'root')
-      host = ENV.fetch('TEST_MYSQL_HOST', '127.0.0.1')
+      host = ENV.fetch('TEST_MYSQL_HOST', 'localhost')
       port = ENV.fetch('TEST_MYSQL_PORT', '3306')
       db = ENV.fetch('TEST_MYSQL_DB', 'mysql')
       ActiveRecord::Base.establish_connection("mysql2://root:#{root_pw}@#{host}:#{port}/#{db}")
@@ -32,7 +32,7 @@
 
     after do
       root_pw = ENV.fetch('TEST_MYSQL_ROOT_PASSWORD', 'root')
-      host = ENV.fetch('TEST_MYSQL_HOST', '127.0.0.1')
+      host = ENV.fetch('TEST_MYSQL_HOST', 'localhost')
       port = ENV.fetch('TEST_MYSQL_PORT', '3306')
       db = ENV.fetch('TEST_MYSQL_DB', 'mysql')
       ActiveRecord::Base.establish_connection("mysql2://root:#{root_pw}@#{host}:#{port}/#{db}")

spec/datadog/tracing/contrib/dalli/instrumentation_spec.rb

@@ -10,7 +10,7 @@
 require 'datadog/tracing/contrib/dalli/patcher'
 
 RSpec.describe 'Dalli instrumentation' do
-  let(:test_host) { ENV.fetch('TEST_MEMCACHED_HOST', '127.0.0.1') }
+  let(:test_host) { ENV.fetch('TEST_MEMCACHED_HOST', 'localhost') }
   let(:test_port) { ENV.fetch('TEST_MEMCACHED_PORT', '11211') }
 
   let(:client) { ::Dalli::Client.new("#{test_host}:#{test_port}") }
@@ -72,6 +72,7 @@
       expect(span.resource).to eq('SET')
       expect(span).to_not have_tag('memcached.command')
       expect(span.get_tag('out.host')).to eq(test_host)
+      expect(span.get_tag('out.host')).to_not be_an_ip_address
       expect(span.get_tag('out.port')).to eq(test_port.to_f)
       expect(span.get_tag('db.system')).to eq('memcached')
       expect(span.get_tag(Datadog::Tracing::Metadata::Ext::TAG_KIND)).to eq('client')

spec/datadog/tracing/contrib/elasticsearch/transport_spec.rb

@@ -25,7 +25,7 @@
     WebMock.disable!
   end
 
-  let(:host) { ENV.fetch('TEST_ELASTICSEARCH_HOST', '127.0.0.1').freeze }
+  let(:host) { ENV.fetch('TEST_ELASTICSEARCH_HOST', 'localhost').freeze }
   let(:port) { ENV.fetch('TEST_ELASTICSEARCH_PORT', '1234').to_i }
   let(:server) { "http://#{host}:#{port}" }
 
@@ -111,6 +111,7 @@ def call(env)
           expect(span.get_tag('elasticsearch.params')).to be nil
           expect(span.get_tag('elasticsearch.body')).to be nil
           expect(span.get_tag('out.host')).to eq(host)
+          expect(span.get_tag('out.host')).to_not be_an_ip_address
           expect(span.get_tag('out.port')).to eq(port)
         end
 

spec/datadog/tracing/contrib/ethon/easy_patch_spec.rb

@@ -246,6 +246,7 @@
 
       expect(span.get_tag('http.url')).to eq('/sample/path')
       expect(span.get_tag('out.host')).to eq('example.com')
+      expect(span.get_tag('out.host')).to_not be_an_ip_address
     end
   end
 

spec/datadog/tracing/contrib/excon/instrumentation_spec.rb

@@ -433,6 +433,7 @@
 
       expect(span.get_tag('http.url')).to eq('/sample/path')
       expect(span.get_tag('out.host')).to eq('example.com')
+      expect(span.get_tag('out.host')).to_not be_an_ip_address
     end
   end
 

spec/datadog/tracing/contrib/http/request_spec.rb

@@ -20,7 +20,7 @@
     WebMock.disable!
   end
 
-  let(:host) { '127.0.0.1' }
+  let(:host) { 'localhost' }
   let(:port) { 1234 }
   let(:uri) { "http://#{host}:#{port}" }
   let(:path) { '/my/path' }
@@ -66,6 +66,7 @@
         expect(span.get_tag('http.method')).to eq('GET')
         expect(span.get_tag('http.status_code')).to eq('200')
         expect(span.get_tag('out.host')).to eq(host)
+        expect(span.get_tag('out.host')).to_not be_an_ip_address
         expect(span.get_tag('out.port')).to eq(port.to_s)
         expect(span.get_tag('span.kind')).to eq('client')
         expect(span.status).to eq(0)
@@ -82,7 +83,7 @@
       end
 
       it_behaves_like 'a peer service span' do
-        let(:peer_service_val) { '127.0.0.1' }
+        let(:peer_service_val) { 'localhost' }
         let(:peer_service_source) { 'peer.hostname' }
       end
 
@@ -135,7 +136,7 @@
       end
 
       it_behaves_like 'a peer service span' do
-        let(:peer_service_val) { '127.0.0.1' }
+        let(:peer_service_val) { 'localhost' }
         let(:peer_service_source) { 'peer.hostname' }
       end
 
@@ -169,7 +170,7 @@
       end
 
       it_behaves_like 'a peer service span' do
-        let(:peer_service_val) { '127.0.0.1' }
+        let(:peer_service_val) { 'localhost' }
         let(:peer_service_source) { 'peer.hostname' }
       end
 
@@ -206,7 +207,7 @@
       end
 
       it_behaves_like 'a peer service span' do
-        let(:peer_service_val) { '127.0.0.1' }
+        let(:peer_service_val) { 'localhost' }
         let(:peer_service_source) { 'peer.hostname' }
       end
 
@@ -260,7 +261,7 @@
       end
 
       it_behaves_like 'a peer service span' do
-        let(:peer_service_val) { '127.0.0.1' }
+        let(:peer_service_val) { 'localhost' }
         let(:peer_service_source) { 'peer.hostname' }
       end
     end
@@ -285,7 +286,7 @@
       before do
         Datadog.configure do |c|
           c.tracing.instrument :http, configuration_options
-          c.tracing.instrument :http, describes: /127.0.0.1/ do |http|
+          c.tracing.instrument :http, describes: /localhost/ do |http|
             http.service_name = 'bar'
             http.split_by_domain = false
           end

spec/datadog/tracing/contrib/httpclient/instrumentation_spec.rb

@@ -332,6 +332,7 @@
 
         expect(span.get_tag('http.url')).to eq('/sample/path')
         expect(span.get_tag('out.host')).to eq('localhost')
+        expect(span.get_tag('out.host')).to_not be_an_ip_address
       end
     end
 

spec/datadog/tracing/contrib/httprb/instrumentation_spec.rb

@@ -335,6 +335,7 @@
 
         expect(span.get_tag('http.url')).to eq('/sample/path')
         expect(span.get_tag('out.host')).to eq('localhost')
+        expect(span.get_tag('out.host')).to_not be_an_ip_address
       end
     end
 

spec/datadog/tracing/contrib/mongodb/client_spec.rb

@@ -125,6 +125,11 @@
           expect(spans.first.service).to eq(secondary_service)
         end
 
+        it 'captures the unresolved host name' do
+          subject
+          expect(spans.first.get_tag('out.host')).to eq('localhost')
+        end
+
         it_behaves_like 'a peer service span' do
           let(:peer_service_val) {  database }
           let(:peer_service_source) { 'mongodb.db' }
@@ -155,6 +160,7 @@
         expect(span.get_tag('mongodb.collection')).to eq(collection_value)
         expect(span.get_tag('db.mongodb.collection')).to eq(collection_value)
         expect(span.get_tag('out.host')).to eq(host)
+        expect(span.get_tag('out.host')).to_not be_an_ip_address
         expect(span.get_tag('out.port')).to eq(port)
         expect(span.get_tag(Datadog::Tracing::Metadata::Ext::TAG_COMPONENT)).to eq('mongodb')
         expect(span.get_tag(Datadog::Tracing::Metadata::Ext::TAG_OPERATION)).to eq('command')

spec/datadog/tracing/contrib/mysql2/patcher_spec.rb

@@ -102,6 +102,7 @@
           expect(span.get_tag('db.instance')).to eq(database)
           expect(span.get_tag('mysql2.db.name')).to eq(database)
           expect(span.get_tag('out.host')).to eq(host)
+          expect(span.get_tag('out.host')).to_not be_an_ip_address if PlatformHelpers.ci? # This test is hard to run locally because mysql considers `localhost` as a unix socket
           expect(span.get_tag('out.port')).to eq(port)
           expect(span.get_tag('db.system')).to eq('mysql')
           expect(span.get_tag(Datadog::Tracing::Metadata::Ext::TAG_COMPONENT)).to eq('mysql2')

spec/datadog/tracing/contrib/pg/patcher_spec.rb

@@ -25,7 +25,7 @@
     )
   end
 
-  let(:host) { ENV.fetch('TEST_POSTGRES_HOST') { '127.0.0.1' } }
+  let(:host) { ENV.fetch('TEST_POSTGRES_HOST') { 'localhost' } }
   let(:port) { ENV.fetch('TEST_POSTGRES_PORT') { '5432' } }
   let(:dbname) { ENV.fetch('TEST_POSTGRES_DB') { 'postgres' } }
   let(:user) { ENV.fetch('TEST_POSTGRES_USER') { 'postgres' } }
@@ -115,7 +115,8 @@
             expect(span.get_tag(Datadog::Tracing::Contrib::Ext::DB::TAG_INSTANCE)).to eq(dbname)
             expect(span.get_tag(Datadog::Tracing::Contrib::Ext::DB::TAG_USER)).to eq(user)
             expect(span.get_tag('db.system')).to eq('postgresql')
-            expect(span.get_tag(Datadog::Tracing::Metadata::Ext::NET::TAG_TARGET_HOST)).to eq(host)
+            expect(span.get_tag('out.host')).to eq(host)
+            expect(span.get_tag('out.host')).to_not be_an_ip_address
             expect(span.get_tag(Datadog::Tracing::Metadata::Ext::NET::TAG_TARGET_PORT)).to eq(port.to_i)
             expect(span.get_tag(Datadog::Tracing::Metadata::Ext::NET::TAG_DESTINATION_NAME)).to eq(host)
             expect(span.get_tag(Datadog::Tracing::Metadata::Ext::NET::TAG_DESTINATION_PORT)).to eq(port.to_i)

spec/datadog/tracing/contrib/presto/client_spec.rb

@@ -100,6 +100,7 @@ def presto_online?
         expect(span.get_tag('presto.http_proxy')).to eq(http_proxy)
         expect(span.get_tag('presto.model_version')).to eq(model_version)
         expect(span.get_tag('out.host')).to eq(host)
+        expect(span.get_tag('out.host')).to_not be_an_ip_address
         expect(span.get_tag('out.port')).to eq(port)
         expect(span.get_tag(Datadog::Tracing::Metadata::Ext::TAG_COMPONENT)).to eq('presto')
         expect(span.get_tag(Datadog::Tracing::Metadata::Ext::TAG_OPERATION)).to eq(operation)

spec/datadog/tracing/contrib/rails/support/database.rb

@@ -58,7 +58,7 @@ def mysql_url(protocol = 'mysql2')
             def mysql_hash
               {
                 database: ENV.fetch('TEST_MYSQL_DB', 'mysql'),
-                host: ENV.fetch('TEST_MYSQL_HOST', '127.0.0.1'),
+                host: ENV.fetch('TEST_MYSQL_HOST', 'localhost'),
                 password: ENV.fetch('TEST_MYSQL_ROOT_PASSWORD', 'root'),
                 port: ENV.fetch('TEST_MYSQL_PORT', '3306')
               }

spec/datadog/tracing/contrib/redis/instrumentation_spec.rb

@@ -4,7 +4,7 @@
 require 'datadog'
 
 RSpec.describe 'Redis instrumentation test' do
-  let(:test_host) { ENV.fetch('TEST_REDIS_HOST', '127.0.0.1') }
+  let(:test_host) { ENV.fetch('TEST_REDIS_HOST', 'localhost') }
   let(:test_port) { ENV.fetch('TEST_REDIS_PORT', 6379).to_i }
 
   # Redis instance supports 16 databases,
@@ -37,6 +37,7 @@
       expect(span.get_tag(Datadog::Tracing::Metadata::Ext::TAG_OPERATION)).to eq('command')
 
       expect(span.get_tag('out.host')).to eq(@host)
+      expect(span.get_tag('out.host')).to_not be_an_ip_address
       expect(span.get_tag('out.port')).to eq(@port.to_f)
       expect(span.get_tag('redis.raw_command')).to eq(@raw_command)
       expect(span.get_tag('db.system')).to eq('redis')

spec/datadog/tracing/contrib/rest_client/request_patch_spec.rb

@@ -205,6 +205,7 @@
 
         expect(span.get_tag('http.url')).to eq('/sample/path')
         expect(span.get_tag('out.host')).to eq('example.com')
+        expect(span.get_tag('out.host')).to_not be_an_ip_address
       end
     end
 

spec/datadog/tracing/contrib/sequel/instrumentation_spec.rb

@@ -230,7 +230,7 @@
       db = ENV.fetch('TEST_MYSQL_DB', 'mysql')
       "#{adapter}://#{host}:#{port}/#{db}?user=#{user}&password=#{password}"
     end
-    let(:host) { ENV.fetch('TEST_MYSQL_HOST', '127.0.0.1') }
+    let(:host) { ENV.fetch('TEST_MYSQL_HOST', 'localhost') }
     let(:adapter) do
       if PlatformHelpers.jruby?
         'mysql'

spec/datadog/tracing/contrib/support/matchers.rb

@@ -18,3 +18,16 @@
 
   diffable
 end
+
+# Check if the provided string is a valid IPv4 or IPv6 address.
+RSpec::Matchers.define :be_an_ip_address do
+  match do |actual|
+    !!IPAddr.new(actual)
+  rescue IPAddr::InvalidAddressError
+    false
+  end
+
+  description do
+    "be an IPv4 or IPv6 address"
+  end
+end

spec/datadog/tracing/contrib/trilogy/patcher_spec.rb

@@ -24,7 +24,7 @@
     )
   end
 
-  let(:host) { ENV.fetch('TEST_MYSQL_HOST') { '127.0.0.1' } }
+  let(:host) { ENV.fetch('TEST_MYSQL_HOST') { 'localhost' } }
   let(:port) { ENV.fetch('TEST_MYSQL_PORT') { '3306' } }
   let(:database) { ENV.fetch('TEST_MYSQL_DB') { 'mysql' } }
   let(:username) { ENV.fetch('TEST_MYSQL_USER') { 'root' } }
@@ -88,6 +88,7 @@
           expect(span.get_tag('db.instance')).to eq(database)
           expect(span.get_tag('trilogy.db.name')).to eq(database)
           expect(span.get_tag('out.host')).to eq(host)
+          expect(span.get_tag('out.host')).to_not be_an_ip_address
           expect(span.get_tag('out.port')).to eq(port.to_f)
           expect(span.get_tag('db.system')).to eq('mysql')
           expect(span.get_tag(Datadog::Tracing::Metadata::Ext::TAG_COMPONENT)).to eq('trilogy')