otelhttp derives server.address from the Host header, which creates
a unique time series for every subdomain hostname on public gateways
(e.g. each CID.ipfs.dweb.link). this caused multi-gigabyte prometheus
responses and scrape timeouts.
- cmd/ipfs/kubo/daemon.go: add OTel SDK View that drops server.address
from all http.server.* metrics at the MeterProvider level
- core/corehttp/gateway.go: add server.domain attribute to Gateway and
HostnameGateway handlers, grouping by Gateway.PublicGateways suffix
(e.g. "dweb.link"), with "localhost", "loopback", or "other" fallbacks
- core/corehttp/commands.go: add server.domain="api" to RPC handler
- core/corehttp/gateway.go: add server.domain="libp2p" to libp2p handler
- docs/changelogs/v0.40.md: add changelog highlight
- docs/metrics.md: document server_domain label and server_address drop
* refactor: consolidate Provider/Reprovider into unified Provide config
- merge Provider and Reprovider configs into single Provide section
- add fs-repo-17-to-18 migration for config consolidation
- improve migration ergonomics with common package utilities
- convert deprecated "flat" strategy to "all" during migration
- improve Provide docs
* docs: add total_provide_count metric guidance
- document how to monitor provide success rates via prometheus metrics
- add performance comparison section to changelog
- explain how to evaluate sweep vs legacy provider effectiveness
* fix: add OpenTelemetry meter provider for metrics
- set up meter provider with Prometheus exporter in daemon
- enables metrics from external libs like go-libp2p-kad-dht
- fixes missing total_provide_count_total when SweepEnabled=true
- update docs to reflect actual metric names
---------
Co-authored-by: gammazero <11790789+gammazero@users.noreply.github.com>
Co-authored-by: guillaumemichel <guillaume@michel.id>
Co-authored-by: Daniel Norman <1992255+2color@users.noreply.github.com>
Co-authored-by: Hector Sanjuan <code@hector.link>
