Add recipe for traceway/opentelemetry-symfony

[jstojiljkovic]

Q	A
License	MIT

Adds a Flex recipe for traceway/opentelemetry-symfony - a pure-PHP OpenTelemetry instrumentation bundle for Symfony 6.4 LTS / 7.x / 8.x. No C extension required.

The bundle ships automatic tracing for HTTP, Console, HttpClient, Messenger, Mailer, Scheduler, Doctrine DBAL, Cache, and Twig; Monolog log-trace correlation; opt-in OTel log export; and opt-in metrics. It is stable since v1.0 and currently at v2.1.0.

What the recipe does

• Registers Traceway\OpenTelemetryBundle\OpenTelemetryBundle in config/bundles.php for all environments.
• Adds an OTEL_* env-var block to .env with the minimum needed to point at a local OTel Collector at http://localhost:4318 over http/json.
• Creates a minimal config/packages/open_telemetry.yaml that excludes profiler / WDT / health-check paths from tracing in dev and disables all signals in the test environment.
• Post-install message points users to bin/console traceway:doctor to verify wiring.

Aliases

Proposed: otel, opentelemetry. Happy to drop either if they conflict with existing claims.

Stability

The bundle is stable since v1.0 (Aug 2024), follows SemVer, has PHPStan level 10 with no baseline, and CI runs across PHP 8.1–8.5 × Symfony 6.4 / 7.x / 8.x × DBAL 3+4. Public service tags
(traceway.doctor.check) and config schema (open_telemetry.*) are documented and stable.

[symfony-recipes-bot]

Thanks for the PR 😍

How to test these changes in your application

1. Define the SYMFONY_ENDPOINT environment variable:

   # On Unix-like (BSD, Linux and macOS)
   export SYMFONY_ENDPOINT=https://raw.githubusercontent.com/symfony/recipes-contrib/flex/pull-1991/index.json
   # On Windows
   SET SYMFONY_ENDPOINT=https://raw.githubusercontent.com/symfony/recipes-contrib/flex/pull-1991/index.json

2. Install the package(s) related to this recipe:

   composer req symfony/flex
   composer req 'traceway/opentelemetry-symfony:^2.1'

3. Don't forget to unset the SYMFONY_ENDPOINT environment variable when done:

   # On Unix-like (BSD, Linux and macOS)
   unset SYMFONY_ENDPOINT
   # On Windows
   SET SYMFONY_ENDPOINT=

Diff between recipe versions

In order to help with the review stage, I'm in charge of computing the diff between the various versions of patched recipes.
I'm going keep this comment up to date with any updates of the attached patch.