Draft: Logs SDK, OTLP exporter

.github/workflows/ci.yml

@@ -87,6 +87,7 @@ jobs:
           - opentelemetry-exporter-otlp-grpc
           - opentelemetry-exporter-otlp-http
           - opentelemetry-exporter-zipkin
+          - opentelemetry-exporter-otlp-logs
           - opentelemetry-exporter-otlp-metrics
         os:
           - ubuntu-latest
@@ -134,8 +135,9 @@ jobs:
           echo "skip=false" >> $GITHUB_OUTPUT
           [[ "${{ matrix.gem }}" == "opentelemetry-exporter-otlp"        ]] && echo "skip=true" >> $GITHUB_OUTPUT
           [[ "${{ matrix.gem }}" == "opentelemetry-exporter-otlp-common" ]] && echo "skip=true" >> $GITHUB_OUTPUT
-          [[ "${{ matrix.gem }}" == "opentelemetry-exporter-otlp-http"   ]] && echo "skip=true" >> $GITHUB_OUTPUT
           [[ "${{ matrix.gem }}" == "opentelemetry-exporter-otlp-grpc"   ]] && echo "skip=true" >> $GITHUB_OUTPUT
+          [[ "${{ matrix.gem }}" == "opentelemetry-exporter-otlp-http"   ]] && echo "skip=true" >> $GITHUB_OUTPUT
+          [[ "${{ matrix.gem }}" == "opentelemetry-exporter-otlp-logs" ]] && echo "skip=true" >> $GITHUB_OUTPUT
           [[ "${{ matrix.gem }}" == "opentelemetry-exporter-otlp-metrics" ]] && echo "skip=true" >> $GITHUB_OUTPUT
           # This is essentially a bash script getting evaluated, so we need to return true or the whole job fails.
           true

api/lib/opentelemetry.rb

@@ -28,7 +28,11 @@ module OpenTelemetry
 
   # @return [Object, Logger] configured Logger or a default STDOUT Logger.
   def logger
-    @logger ||= Logger.new($stdout, level: ENV['OTEL_LOG_LEVEL'] || Logger::INFO)
+    @logger ||= create_logger
+    # alternately: Logger.new($stdout, level: ENV['OTEL_LOG_LEVEL'] || Logger::INF, progname: 'OpenTelemetry')
+    # and clean up the log messages that are prefixed with "OpenTelemetry"
+    # if we want log records generated for OpenTelemetry logs, I think we can do that, but I imagine this is
+    # "untraced" territory
   end
 
   # @return [Callable] configured error handler or a default that logs the
@@ -69,4 +73,15 @@ def tracer_provider
   def propagation
     @propagation ||= Context::Propagation::NoopTextMapPropagator.new
   end
+
+  private
+
+  def create_logger
+    logger = Logger.new($stdout, level: ENV['OTEL_LOG_LEVEL'] || Logger::INFO)
+    # @skip_instrumenting prevents Ruby Logger instrumentation from
+    # triggering a stack overflow. Logs emitted using OpenTelemetry.logger
+    # will not be turned into OpenTelemetry LogRecords.
+    logger.instance_variable_set(:@skip_instrumenting, true)
+    logger
+  end
 end

exporter/otlp-logs/.rubocop.yml

@@ -0,0 +1,19 @@
+inherit_from:
+  - ../../contrib/rubocop.yml
+
+AllCops:
+  Exclude:
+    - "lib/opentelemetry/proto/**/*"
+    - "vendor/**/*"
+
+Naming/FileName:
+  Exclude:
+    - lib/opentelemetry-exporter-otlp-logs.rb
+Style/StringLiterals:
+  Exclude:
+    - gemfiles/**/*
+Style/FrozenStringLiteralComment:
+  Exclude:
+    - gemfiles/**/*
+Metrics/BlockLength:
+  Enabled: false

exporter/otlp-logs/.yardopts

@@ -0,0 +1,9 @@
+--no-private
+--title=OpenTelemetry OTLP Logs Exporter
+--markup=markdown
+--main=README.md
+./lib/opentelemetry/exporter/otlp-logs/**/*.rb
+./lib/opentelemetry/exporter/otlp.rb
+-
+README.md
+CHANGELOG.md

exporter/otlp-logs/Appraisals

@@ -0,0 +1,21 @@
+# frozen_string_literal: true
+
+# Copyright The OpenTelemetry Authors
+#
+# SPDX-License-Identifier: Apache-2.0
+
+appraise 'google-protobuf-3.18.0' do
+  gem 'google-protobuf', '~> 3.18.0'
+end
+
+appraise 'google-protobuf-3.25.0' do
+  gem 'google-protobuf', '~> 3.25.0'
+end
+
+appraise 'google-protobuf-4.29.0' do
+  gem 'google-protobuf', '~> 4.29.0'
+end
+
+appraise 'google-protobuf-latest' do
+  gem 'google-protobuf'
+end

exporter/otlp-logs/CHANGELOG.md

@@ -0,0 +1 @@
+# Release History: opentelemetry-exporter-otlp-logs

exporter/otlp-logs/Gemfile

@@ -0,0 +1,24 @@
+# frozen_string_literal: true
+
+# Copyright The OpenTelemetry Authors
+#
+# SPDX-License-Identifier: Apache-2.0
+
+source 'https://rubygems.org'
+
+gemspec
+
+group :test, :development do
+  gem 'opentelemetry-api', path: '../../api'
+  gem 'opentelemetry-common', path: '../../common'
+  gem 'opentelemetry-logs-api', path: '../../logs_api'
+  gem 'opentelemetry-logs-sdk', path: '../../logs_sdk'
+  gem 'opentelemetry-registry', path: '../../registry'
+  gem 'opentelemetry-sdk', path: '../../sdk'
+  gem 'opentelemetry-semantic_conventions', path: '../../semantic_conventions'
+  gem 'opentelemetry-test-helpers', path: '../../test_helpers'
+end
+
+group :test do
+  gem 'minitest-stub-const'
+end

exporter/otlp-logs/LICENSE

@@ -0,0 +1,201 @@
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