linkerd / linkerd/linkerd

expose per-endpoint stats in admin interface

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feature/admin
Dominant language
Scala
Stars
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Forks
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Description

Finagle can (optionally) record per-endpoint statistics. We should add a router-client-level configuration parameter to enable recording of these metrics, and integrate them into the admin UI.

These metrics should be disabled by default because they can be quite costly performance-wise (esp for large clusters), but it's a great feature to have when individual backends matter. In larger clusters, tracing is probably a better way to attack this, anyway.

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First steps

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  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by locating the router-client-level configuration and the admin UI entry point for metrics. Check how Finagle per-endpoint statistics can be enabled, then verify that recording remains disabled by default and that enabled metrics appear in the admin interface; no specific files or tests are named.

Written by the indexing model from the issue text.

Assessment

Tech stack
scala
Domain
observability
Issue type
Feature
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
30/100

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