Collapses the status-code dimension of the counter key into six class
lanes (1xx..5xx/unknown) so per-(source,vip) counter cardinality no
longer grows with the number of distinct three-digit responses nginx
serves. Histogram series drop the code label entirely and aggregate
across classes. Adds nginx_ipng_latency_total with a code class label
so average latency per class can still be computed off the scrape.
Adds nginx_ipng_bytes_{in,out} histograms with configurable boundaries
via the new ipng_stats_byte_buckets directive. Bumps JSON schema to 2.
Operators who need full three-digit-code resolution should consume the
ipng_stats_logtail stream off-host; the stats zone intentionally trades
that resolution for a bounded scrape size.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Pim van Pelt
b3ad74cbde