Self-heal device= → ifindex attribution and expose plugin meta
counters in the scrape.
ipng_stats_rescan_interval (default 60s, 0 to disable) runs a
per-worker timer that re-resolves every binding via if_nametoindex,
so interface teardown/recreate (e.g. GRE tunnel reprovision) picks
up the new ifindex without requiring an nginx reload.
nginx_ipng_ifindex_misses_total increments whenever a cmsg-reported
ingress ifindex doesn't match any binding — making stale mappings
observable. Also expose the existing zone_full_events and
flushes_total shared-memory counters, which were tracked but never
emitted. JSON output gains a top-level "meta" object; schema stays
at 2 (additive change).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Pim van Pelt
8e0b1cdde9