[FEATURE] Out of the box New Relic PHP agent support

[normalerweise]

Is your feature request related to a problem?

Using OpenSearch client in combination with New Relic (e.g. when migrating from Elasticsearch)
does not work immediately. I.e. OpenSearch client does not get instrumented, so no span for the OpenSearch requests gets created. So the time the OpenSearch request takes gets attributed to time spend in PHP in New Relic.
This distorts and complicates run-time analysis.

The reason is using an old and relatively unmaintained dependency ezimuel/ringphp instead of up to date version of Guzzle Library.
See here))) and here

What solution would you like?

Upgrade to work with Guzzle HTTP client library 7

What alternatives have you considered?

Dealing with custom instrumentation

• https://docs.newrelic.com/docs/apm/agents/php-agent/features/php-custom-instrumentation/
• https://docs.newrelic.com/docs/apm/agents/php-agent/php-agent-api/newrelic_add_custom_tracer/

Do you have any additional context?

none

[shyim]

I would not use Guzzle when we change the HTTP client. https://www.php-fig.org/psr/psr-7/ and https://www.php-fig.org/psr/psr-18/ are better I think.

Just using Guzzle because a random provider has support for it feels wrong, and in my opinion, they developed it wrong. They should instrument curl and not a specific Http Client library implementation which other providers like Blackfire, Tideways, Datadog do.

[dblock]

Thanks for reporting this @normalerweise.

1. Is there a trivial fix like a version upgrade of a dependency?
2. In other languages I see clients support multiple HTTP clients/adapters. In java we have 3, in Ruby we use Faraday that is flexible, etc. @shyim do you think it makes sense to add support for Guzzle next to whatever we have here now?
3. @normalerweise Would you like to try and contribute any of the above? We could really use some help.

I started upgrading Guzzle in https://github.com/dblock/opensearch-php/tree/upgrade-guzzle. There are ... a lot of changes.

[dblock]

Catch All Triage - 1, 2, 3

[dblock]

I merged #233 which introduced PSR interfaces and should enable this out of the box. Could use some help testing and fixing anything broken before we do a release.