●Change8

v3.5.0

📦 prometheusView on GitHub →
✨ 5 features🐛 17 fixes🔧 9 symbols

Summary

Version 3.5 is a Long Term Support (LTS) release introducing several new features in PromQL, OTLP, and Discovery, alongside numerous performance enhancements and bug fixes across the system.

✨ New Features

  • PromQL: Add experimental type and unit metadata labels, behind feature flag \`type-and-unit-labels\`.
  • PromQL: Add \`ts_of_(min|max|last)_over_time\`, behind feature flag \`experimental-promql-functions\`.
  • Scraping: Add global option \`always_scrape_classic_histograms\` to scrape a classic histogram even if it is also exposed as native.
  • OTLP: New config options \`promote_all_resource_attributes\` and \`ignore_resource_attributes\`.
  • Discovery: New service discovery for STACKIT Cloud.

🐛 Bug Fixes

  • Top-level: Update GOGC before loading TSDB.
  • Config: Respect GOGC environment variable if no "runtime" block exists.
  • PromQL: Fix native histogram \`last_over_time\`.
  • PromQL: Fix reported parser position range in errors for aggregations wrapped in ParenExpr.
  • PromQL: Don't emit a value from \`histogram_fraction\` or \`histogram_quantile\` if classic and native histograms are present at the same timestamp.
  • PromQL: Incorrect rounding of \`[1001ms]\` to \`[1s]\` and similar.
  • PromQL: Fix inconsistent / sometimes negative \`histogram_count\` and \`histogram_sum\`.
  • PromQL: Improve handling of NaNs in native histograms.
  • PromQL: Fix unary operator precedence in duration expressions.
  • PromQL: Improve consistency of \`avg\` aggregation and \`avg_over_time\`.
  • UI: Add query warnings and info to graph view.
  • API: Add HTTP \`Vary: Origin\` header to responses to avoid cache poisoning.
  • Discovery: Avoid deadlocks by taking locks in consistent order.
  • Remote-write: For Azure AD auth, allow empty \`client_id\` to suppport system assigned managed identity.
  • Scraping: Fix rare memory corruption bug.
  • Scraping: continue handling custom-bucket histograms after an exponential histogram is encountered.
  • OTLP: Default config not respected when \`otlp:\` block is unset.

🔧 Affected Symbols

ts_of_min_over_timets_of_max_over_timets_of_last_over_timehistogram_fractionhistogram_quantilehistogram_counthistogram_sumavgavg_over_time