'Runtime' node port 'in' metrics are missing in tremor-0.7.4-alpha verison

[rajasimha1991]

Problem
We recently upgraded tremor from 0.6.1 to 0.7.4alpha version. After upgrading we are not able to collect metrics for runtime node in port. We were able to collect metrics in the earlier version.

Steps

1. Add the metrics pipeline

binding:
  - id: metrics
    links:
      '/pipeline/system::metrics/system/out':  ["/offramp/system::stdout/system/in"]

Notes

Output of rustup --version:
Output of rustup show:
Output of tremor-server --version: tremor:0.7.4-alpha

[Licenser]

As part of the optimizations in the version of 0.7 and beyond we are culling nodes of the executable graph that have no impact on the pipeline. The in node for pipelines is one of those nodes. As an alternative, the onramps now include metrics, where the same value can be read from @anupdhml, can elaborate on that.

If that works for you I think we can close that otherwise, it'd be great to understand what problem you're trying to solve and see how we can solve that best.

[Licenser]

@anupdhml @rajasimha1991 can we close this issue?

[anupdhml]

Yes, the onramp metrics work for the need here and since the in node was never part of the pipeline config explicitly, it makes sense for metrics for it to be not present now. Chatted about this with Raj too over slack and he is fine with closing this out.