[GitHub] [openwhisk] ruediger-maass opened a new pull request #4715: Moremetricoptions

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ruediger-maass opened a new pull request #4715: Moremetricoptions
URL: https://github.com/apache/openwhisk/pull/4715
 
 
   Extension points for kamon metric key generator and reporter
   
   ## Description
   We need a different metric key generator and a different reporter in our product. Therefore we request two simple extension points in the `application.conf` for `common` that can be easily configured with two environment variables. If these two variables are not defined then Openwhisk does not change the current behavior.
   
   This PR also includes changes for exposing the two new environment variables to the deployment. Since this is a special use case and you would normally have to add code for a different generator and reporter it is the question if this PR should be limited to only include the changes for `application.conf`.
   
   ## My changes affect the following components
   Current behavior of OpenWhisk only changes if the aforementioned variables are actively used.
   - [ ] API
   - [x] Controller
   - [ ] Message Bus (e.g., Kafka)
   - [ ] Loadbalancer
   - [x] Invoker
   - [ ] Intrinsic actions (e.g., sequences, conductors)
   - [ ] Data stores (e.g., CouchDB)
   - [ ] Tests
   - [x] Deployment
   - [ ] CLI
   - [ ] General tooling
   - [ ] Documentation
   
   ## Types of changes
   - [ ] Bug fix (generally a non-breaking change which closes an issue).
   - [x] Enhancement or new feature (adds new functionality).
   - [ ] Breaking change (a bug fix or enhancement which changes existing behavior).
   
   ## Checklist:
   - [x] I signed an [Apache CLA](https://github.com/apache/openwhisk/blob/master/CONTRIBUTING.md).
   - [x] I reviewed the [style guides](https://github.com/apache/openwhisk/wiki/Contributing:-Git-guidelines#code-readiness) and followed the recommendations (Travis CI will check :).
   - [x] I added tests to cover my changes.
   - [ ] My changes require further changes to the documentation.
   - [x] I updated the documentation where necessary.
   
   

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