Add otel-plugin-nginx, otel-cpp

- Adds opentelemetry-cpp: c++ client for otel (dependency for
  otel-plugin-nginx).
- Adds otel-plugin-nginx

opentelemetry-cpp.yaml

@@ -0,0 +1,56 @@
+package:
+ name: opentelemetry-cpp
+ version: 1.17.0
+ epoch: 0
+ description: The OpenTelemetry C++ Client
+ copyright:
+ - license: Apache-2.0
+
+environment:
+ contents:
+ packages:
+ - abseil-cpp-dev
+ - benchmark-dev
+ - busybox
+ - c-ares-dev
+ - cmake
+ - gcc
+ - glibc-dev
+ - grpc-dev
+ - gtest-dev
+ - icu-dev
+ - make
+ - openssl-dev
+ - pkgconf
+ - protobuf-dev
+ - re2-dev
+ - systemd-dev
+
+pipeline:
+ - uses: git-checkout
+ with:
+ repository: https://github.com/open-telemetry/opentelemetry-cpp
+ tag: v${{package.version}}
+ expected-commit: fa0a5200ddbe9ae6f487a228e658aedc102dab56
+
+ - runs: |
+ mkdir build
+ cd build
+ cmake -DCMAKE_POSITION_INDEPENDENT_CODE=ON -DBUILD_SHARED_LIBS=ON -DWITH_OTLP_GRPC=ON -DWITH_ABSEIL=ON ..
+ cmake --build . --target all
+ cmake --install . --prefix ${{targets.contextdir}}/usr
+
+ - uses: strip
+
+update:
+ enabled: true
+ github:
+ identifier: open-telemetry/opentelemetry-cpp
+ strip-prefix: v
+
+test:
+ pipeline:
+ # AUTOGENERATED
+ - runs: |
+ otelcol --version
+ otelcol --help

opentelemetry-plugin-nginx.yaml

@@ -0,0 +1,125 @@
+#nolint:valid-pipeline-git-checkout-tag
+package:
+ name: opentelemetry-plugin-nginx
+ version: 0_git20241008
+ epoch: 0
+ description: Adds OpenTelemetry distributed tracing support to nginx.
+ copyright:
+ - license: Apache-2.0
+ dependencies:
+ runtime:
+ - opentelemetry-cpp
+
+environment:
+ contents:
+ packages:
+ - abseil-cpp-dev
+ - busybox
+ - c-ares-dev
+ - cmake
+ - curl-dev
+ - gcc
+ - glibc-dev
+ - grpc-dev
+ - icu-dev
+ - make
+ - nginx
+ - opentelemetry-cpp
+ - pcre-dev
+ - protobuf-c-dev
+ - protobuf-dev
+ - re2-dev
+ - systemd-dev
+
+pipeline:
+ - uses: git-checkout
+ with:
+ repository: https://github.com/open-telemetry/opentelemetry-cpp-contrib
+ branch: main
+ expected-commit: f6d29426ee9b4d6b476c09ca3cb9bed3cf23906f
+
+ - runs: |
+ cd instrumentation/nginx
+
+ mkdir build
+ cd build
+ cmake ..
+ make
+
+ mkdir -p ${{targets.contextdir}}/usr/share/nginx/modules
+ cp -p otel_ngx_module.so ${{targets.contextdir}}/usr/share/nginx/modules/
+
+ - uses: strip
+
+update:
+ enabled: true
+ git: {}
+ schedule:
+ period: weekly
+ reason: shared contrib repo that doesn't maintain tags for this component
+
+test:
+ environment:
+ contents:
+ packages:
+ - nginx
+ pipeline:
+ - uses: git-checkout
+ with:
+ repository: https://github.com/open-telemetry/opentelemetry-cpp-contrib
+ branch: main
+ expected-commit: f6d29426ee9b4d6b476c09ca3cb9bed3cf23906f
+ - runs: |
+ cat <<EOF > /etc/nginx/nginx.conf
+ load_module /usr/share/nginx/modules/otel_ngx_module.so;
+
+ user nobody;
+
+ http {
+ opentelemetry_config /etc/nginx/otel-nginx.toml;
+
+ server {
+ listen 80;
+ server_name otel_example;
+
+ root /var/www/html;
+
+ location = / {
+ opentelemetry_operation_name my_example_backend;
+ opentelemetry_propagate;
+ proxy_pass http://localhost:3500/;
+ }
+ }
+ }
+ events {}
+ EOF
+
+ cat <<EOF > /etc/nginx/otel-nginx.toml
+ exporter = "otlp"
+ processor = "batch"
+
+ [exporters.otlp]
+ # Alternatively the OTEL_EXPORTER_OTLP_ENDPOINT environment variable can also be used.
+ host = "localhost"
+ port = 4317
+
+ [processors.batch]
+ max_queue_size = 2048
+ schedule_delay_millis = 5000
+ max_export_batch_size = 512
+
+ [service]
+ # Can also be set by the OTEL_SERVICE_NAME environment variable.
+ name = "nginx-proxy" # Opentelemetry resource name
+
+ [sampler]
+ name = "AlwaysOn" # Also: AlwaysOff, TraceIdRatioBased
+ ratio = 0.1
+ parent_based = false
+ EOF
+
+ # Not sure why this isn't included in main package.
+ mkdir -p /var/lib/nginx/tmp/
+ # -T: test the configuration file: nginx checks the configuration for correct syntax, and then tries to open files referred in the configuration.
+ # additionally dump configuration files to standard output (1.9.2).
+ - runs: nginx -T