Change AccountService from Go to DotNet (auto)

[RassK]

Changes

Fixes #589

Changes AccountingService from Go to .NET service.
Uses OpenTelemetry .NET Automatic Instrumentation.

NOTE: It's a first preview of demo app that is instrumented with OpenTelemetry .NET Automatic instrumentation. Some parts are still TBD. Please review and add comments about improvements and missing parts / docs.

Merge Requirements

For new features contributions please make sure you have completed the following
essential items:

• CHANGELOG.md updated to document new feature additions
• Appropriate documentation updates in the docs
• Appropriate Helm chart updates in the helm-charts

Maintainers will not merge until the above have been completed. If you're unsure
which docs need to be changed ping the
@open-telemetry/demo-approvers.

[github-actions]

This PR was marked stale due to lack of activity. It will be closed in 7 days.

[RassK]

Example Jaeger traces:

CC: @lachmatt @Kielek Should parentless Kafka consume requests be filtered? Seems without additional context these just trash the output.

[RassK]

After removing EOF

[puckpuck]

@RassK Can you add a Chanlog entry for this? Also, we will need to update docs and the Helm chart for this. If you need help to prep a PR in those areas, please let us know.

[RassK]

@puckpuck thanks for helping to guide the last steps missing. I have updated the changelog. Would be glad to accept some help with other missing parts as well. It's my first PR to this repo.

[github-actions]

This PR was marked stale due to lack of activity. It will be closed in 7 days.

[RassK]

Updated solution (OTel Auto 1.7.0) >

[julianocosta89]

Hey @RassK it looks good, before approving would you mind explaining those log entries?

Accounting service started
[CORECLR_ENABLE_PROFILING, 1]
[CORECLR_PROFILER, {918728DD-259F-4A6A-AC2B-B85E1B658318}]
[CORECLR_PROFILER_PATH, /app/OpenTelemetry.AutoInstrumentation.Native.so]
[DOTNET_RUNNING_IN_CONTAINER, true]
[DOTNET_STARTUP_HOOKS, /app/OpenTelemetry.AutoInstrumentation.StartupHook.dll]

[RassK]

Hey @RassK it looks good, before approving would you mind explaining those log entries?

Accounting service started
[CORECLR_ENABLE_PROFILING, 1]
[CORECLR_PROFILER, {918728DD-259F-4A6A-AC2B-B85E1B658318}]
[CORECLR_PROFILER_PATH, /app/OpenTelemetry.AutoInstrumentation.Native.so]
[DOTNET_RUNNING_IN_CONTAINER, true]
[DOTNET_STARTUP_HOOKS, /app/OpenTelemetry.AutoInstrumentation.StartupHook.dll]

That's a quick startup diagnostics (by AccountingService.Helpers that filters relevant environment variables). Due automatic instrumentation is configured mostly by envs, then this could be helpful for a quick diagnosis.

Ideally a built in diagnostics (OTEL_LOG_LEVEL=debug) should do the similar but instead logs to the file.

[julianocosta89]

I've updated the tracetest to reflect the change, hope you don't mind. 😅

This should be good to go, I'll just wait to see if any other maintainer/approver has something to say.

Thanks for taking care of it 🤩

[RassK]

Just need to increase mem limit in the helm chart left? Can anyone help / explain where, I have had 0 connections to helm charts so far 😬

[julianocosta89]

the Helm chart will not be updated till next version release.

If you want to update it, you can do the memory limit here:
https://github.com/open-telemetry/opentelemetry-helm-charts/blob/main/charts/opentelemetry-demo/values.yaml#L165

Then you need to bump a minor version here: https://github.com/open-telemetry/opentelemetry-helm-charts/blob/main/charts/opentelemetry-demo/Chart.yaml#L4

And last you need to run the: make generate-examples CHARTS=opentelemetry-demo.

You could also sync with @rogercoll and add it to his opened PR:
open-telemetry/opentelemetry-helm-charts#1232

Whenever you add it, you will still need to run the make generate command above.

[julianocosta89]

@puckpuck, @mviitane are you good with this one being merged?

[puckpuck]

I tested again, and all looks fine using a linked span here instead. I will make another PR so the frauddetectionservice goes back to creating a child span instead of a linked span. This will allow us to showcase both examples with a message queue.