rm-hull / dot-block / 26782665238

47%

Build Type

push

github

Committed by web-flow

Commit Message

feat: add upstream failure logging and metrics (#133)

* feat: add upstream failure logging and metrics

- Inject `*slog.Logger` into `RoundRobinClient` to enable failure
logging.
- Add `dns_upstream_failures_total` Prometheus metric to track upstream
  failures categorized by server and error type (timeout, network,
etc.).
- Update `RoundRobinClient` to record failure reasons upon exchange
errors.

* refactor: update RoundRobinClient to use shared metrics

Update the client to use the metrics instance provided during
initialization rather than accessing the pool's metrics field,
improving consistency and decoupling.

* feat: add dedicated metric for pooled connection deaths

Replaced the generic `UpstreamFailures` metric with a dedicated
`dns_pooled_connection_deaths_total` metric. This improves
observability by isolating connection-specific issues from general
upstream request failures.

Coverage Stats

17 of 36 new or added lines in 3 files covered. (47.22%)

1 existing line in 1 file now uncovered.

704 of 1562 relevant lines covered (45.07%)

1168.41 hits per line