fix: Handle IPv6 addresses in OTLP HTTP connection

.rspec

@@ -0,0 +1 @@
+--require spec_helper

exporter/otlp-http/lib/opentelemetry/exporter/otlp/http/trace_exporter.rb

@@ -109,7 +109,7 @@ def fetch_ssl_verify_mode
           end
 
           def http_connection(uri, ssl_verify_mode, certificate_file, client_certificate_file, client_key_file)
-            http = Net::HTTP.new(uri.host, uri.port)
+            http = Net::HTTP.new(uri.hostname, uri.port)
             http.use_ssl = uri.scheme == 'https'
             http.verify_mode = ssl_verify_mode
             http.ca_file = certificate_file unless certificate_file.nil?

exporter/otlp-metrics/lib/opentelemetry/exporter/otlp/metrics/util.rb

@@ -16,7 +16,7 @@ module Util # rubocop:disable Metrics/ModuleLength
           DEFAULT_USER_AGENT = "OTel-OTLP-MetricsExporter-Ruby/#{OpenTelemetry::Exporter::OTLP::Metrics::VERSION} Ruby/#{RUBY_VERSION} (#{RUBY_PLATFORM}; #{RUBY_ENGINE}/#{RUBY_ENGINE_VERSION})".freeze
 
           def http_connection(uri, ssl_verify_mode, certificate_file, client_certificate_file, client_key_file)
-            http = Net::HTTP.new(uri.host, uri.port)
+            http = Net::HTTP.new(uri.hostname, uri.port)
             http.use_ssl = uri.scheme == 'https'
             http.verify_mode = ssl_verify_mode
             http.ca_file = certificate_file unless certificate_file.nil?

exporter/otlp/lib/opentelemetry/exporter/otlp/exporter.rb

@@ -104,7 +104,7 @@ def shutdown(timeout: nil)
         private
 
         def http_connection(uri, ssl_verify_mode, certificate_file, client_certificate_file, client_key_file)
-          http = Net::HTTP.new(uri.host, uri.port)
+          http = Net::HTTP.new(uri.hostname, uri.port)
           http.use_ssl = uri.scheme == 'https'
           http.verify_mode = ssl_verify_mode
           http.ca_file = certificate_file unless certificate_file.nil?

exporter/zipkin/lib/opentelemetry/exporter/zipkin/exporter.rb

@@ -39,7 +39,7 @@ def initialize(endpoint: OpenTelemetry::Common::Utilities.config_opt('OTEL_EXPOR
                    URI(endpoint)
                  end
 
-          @http = Net::HTTP.new(@uri.host, @uri.port)
+          @http = Net::HTTP.new(@uri.hostname, @uri.port)
           @http.use_ssl = @uri.scheme == 'https'
           @http.keep_alive_timeout = KEEP_ALIVE_TIMEOUT
 

spec/spec_helper.rb

@@ -0,0 +1,98 @@
+# This file was generated by the `rspec --init` command. Conventionally, all
+# specs live under a `spec` directory, which RSpec adds to the `$LOAD_PATH`.
+# The generated `.rspec` file contains `--require spec_helper` which will cause
+# this file to always be loaded, without a need to explicitly require it in any
+# files.
+#
+# Given that it is always loaded, you are encouraged to keep this file as
+# light-weight as possible. Requiring heavyweight dependencies from this file
+# will add to the boot time of your test suite on EVERY test run, even for an
+# individual file that may not need all of that loaded. Instead, consider making
+# a separate helper file that requires the additional dependencies and performs
+# the additional setup, and require it from the spec files that actually need
+# it.
+#
+# See https://rubydoc.info/gems/rspec-core/RSpec/Core/Configuration
+RSpec.configure do |config|
+  # rspec-expectations config goes here. You can use an alternate
+  # assertion/expectation library such as wrong or the stdlib/minitest
+  # assertions if you prefer.
+  config.expect_with :rspec do |expectations|
+    # This option will default to `true` in RSpec 4. It makes the `description`
+    # and `failure_message` of custom matchers include text for helper methods
+    # defined using `chain`, e.g.:
+    #     be_bigger_than(2).and_smaller_than(4).description
+    #     # => "be bigger than 2 and smaller than 4"
+    # ...rather than:
+    #     # => "be bigger than 2"
+    expectations.include_chain_clauses_in_custom_matcher_descriptions = true
+  end
+
+  # rspec-mocks config goes here. You can use an alternate test double
+  # library (such as bogus or mocha) by changing the `mock_with` option here.
+  config.mock_with :rspec do |mocks|
+    # Prevents you from mocking or stubbing a method that does not exist on
+    # a real object. This is generally recommended, and will default to
+    # `true` in RSpec 4.
+    mocks.verify_partial_doubles = true
+  end
+
+  # This option will default to `:apply_to_host_groups` in RSpec 4 (and will
+  # have no way to turn it off -- the option exists only for backwards
+  # compatibility in RSpec 3). It causes shared context metadata to be
+  # inherited by the metadata hash of host groups and examples, rather than
+  # triggering implicit auto-inclusion in groups with matching metadata.
+  config.shared_context_metadata_behavior = :apply_to_host_groups
+
+# The settings below are suggested to provide a good initial experience
+# with RSpec, but feel free to customize to your heart's content.
+=begin
+  # This allows you to limit a spec run to individual examples or groups
+  # you care about by tagging them with `:focus` metadata. When nothing
+  # is tagged with `:focus`, all examples get run. RSpec also provides
+  # aliases for `it`, `describe`, and `context` that include `:focus`
+  # metadata: `fit`, `fdescribe` and `fcontext`, respectively.
+  config.filter_run_when_matching :focus
+
+  # Allows RSpec to persist some state between runs in order to support
+  # the `--only-failures` and `--next-failure` CLI options. We recommend
+  # you configure your source control system to ignore this file.
+  config.example_status_persistence_file_path = "spec/examples.txt"
+
+  # Limits the available syntax to the non-monkey patched syntax that is
+  # recommended. For more details, see:
+  # https://rspec.info/features/3-12/rspec-core/configuration/zero-monkey-patching-mode/
+  config.disable_monkey_patching!
+
+  # This setting enables warnings. It's recommended, but in some cases may
+  # be too noisy due to issues in dependencies.
+  config.warnings = true
+
+  # Many RSpec users commonly either run the entire suite or an individual
+  # file, and it's useful to allow more verbose output when running an
+  # individual spec file.
+  if config.files_to_run.one?
+    # Use the documentation formatter for detailed output,
+    # unless a formatter has already been configured
+    # (e.g. via a command-line flag).
+    config.default_formatter = "doc"
+  end
+
+  # Print the 10 slowest examples and example groups at the
+  # end of the spec run, to help surface which specs are running
+  # particularly slow.
+  config.profile_examples = 10
+
+  # Run specs in random order to surface order dependencies. If you find an
+  # order dependency and want to debug it, you can fix the order by providing
+  # the seed, which is printed after each run.
+  #     --seed 1234
+  config.order = :random
+
+  # Seed global randomization in this process using the `--seed` CLI option.
+  # Setting this allows you to use `--seed` to deterministically reproduce
+  # test failures related to randomization by passing the same `--seed` value
+  # as the one that triggered the failure.
+  Kernel.srand config.seed
+=end
+end