Adding ruby lambda layer

[xuan-cao-swi]

Description

Adding the simple ruby lambda layer. For try-out and test run, please see the instruction under README.md.

There are two main directories:

• ruby/src/ directory contains files to build the actual layer. Notably, the zip_ruby_layer.sh is a helper bash script designed to zip the Ruby gems folder.
• ruby/sample-apps/ contains a test application that can be run locally, allowing users to verify if the layer truly incorporates the Ruby OpenTelemetry component.

With respect to GitHub Actions, the workflow for ruby to push layer is defined in release-layer-ruby.yml. However, it still requires testing with a valid ACTIONS_RUNTIME_TOKEN and testing that push the layer to AWS Lambda. Both dependabot.yml and codeql.yml have been updated to support Ruby.

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[tsloughter]

I think this is good as a first step.

There will be follow up needed, by someone, to add an instrumentation library to ruby-contrib and then to use that library here in a new otel_wrapper.rb that will setup the instrumentation and create the span.

[mwear]

LGTM

[tylerbenson]

@xuan-cao-swi are you willing to help maintain this going forward? We don't have anyone familiar with Ruby actively participating in the SIG right now.

[kaylareopelle]

With this example, would the <your_layer_name> value always be OTelLayer?

[xuan-cao-swi]

Yes, because sam takes the template.yaml file to create folder. However, people can change the name if they change the template.yaml file in L10 (e.g. change from OTelLayer to <other_name>), then the folder name will change to <other_name>

[xuan-cao-swi]

@xuan-cao-swi are you willing to help maintain this going forward? We don't have anyone familiar with Ruby actively participating in the SIG right now.

Yes, I am willing to maintain this layer. If there is a SIG talk about lambda progress, I am also happy to participate.

[tylerbenson]

@xuan-cao-swi We have bi-weekly SIG meetings on Tuesdays that you are welcome to attend. Also, please join the #otel-faas slack channel.

[tylerbenson]

I'm ok approving this but I also want to let @rapphil chime in.

[rapphil]

the code LGTM. my only concern is the maintenance of this layer in the long term. Since @xuan-cao-swi is willing to help maintaining it, I'm ok with accepting it.

Thank you very much for your contribution.

[tylerbenson]

Ok, I'm going to merge. Please reply here with the outstanding tasks needed before we can publish this as a layer.

[xuan-cao-swi]

Ok, I'm going to merge. Please reply here with the outstanding tasks needed before we can publish this as a layer.

Thanks, I kind hope open-telemetry/opentelemetry-ruby-contrib#721 get merge then we can create a complete layer.