letsencrypt / letsencrypt/boulder

Add channelz listener

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Dominant language
Go
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Description

I'm troubleshooting an issue where I added an A record for a new SA server to the existing SA service record, but SA clients did not automatically start using that new SA server. I've traced this through grpc call metrics, but perhaps a tool like channelz would better be able to show what grpc clients are connected to what grpc servers?

I don't believe we'd need the web ui portion of this, but we would need to carefully craft grpc-curl invocations to authenticate.

https://grpc.io/blog/a-short-introduction-to-channelz/

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Research direction

The issue names no repository files, tests, or entry points. Start by reading the linked Channelz introduction and reviewing the existing gRPC client/server metrics; done means exposing enough connection information to identify which clients connect to which servers without requiring the web UI, with authenticated grpc-curl usage considered.

Written by the indexing model from the issue text.

Assessment

Tech stack
go, grpc
Domain
observability
Issue type
Feature
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
30/100

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