2.55.0 / 2024-10-22

What's Changed

• [FEATURE] PromQL: Add experimental info function. #14495
• [FEATURE] Support UTF-8 characters in label names - feature flag utf8-names. #14482, #14880, #14736, #14727
• [FEATURE] Scraping: Add the ability to set custom http_headers in config. #14817
• [FEATURE] Scraping: Support feature flag created-timestamp-zero-ingestion in OpenMetrics. #14356, #14815
• [FEATURE] Scraping: scrape_failure_log_file option to log failures to a file. #14734
• [FEATURE] OTLP receiver: Optional promotion of resource attributes to series labels. #14200
• [FEATURE] Remote-Write: Support Google Cloud Monitoring authorization. #14346
• [FEATURE] Promtool: tsdb create-blocks new option to add labels. #14403
• [FEATURE] Promtool: promtool test adds --junit flag to format results. #14506
• [FEATURE] TSDB: Add delayed-compaction feature flag, for people running many Prometheus to randomize timing. #12532
• [ENHANCEMENT] OTLP receiver: Warn on exponential histograms with zero count and non-zero sum. #14706
• [ENHANCEMENT] OTLP receiver: Interrupt translation on context cancellation/timeout. #14612
• [ENHANCEMENT] Remote Read client: Enable streaming remote read if the server supports it. #11379
• [ENHANCEMENT] Remote-Write: Don't reshard if we haven't successfully sent a sample since last update. #14450
• [ENHANCEMENT] PromQL: Delay deletion of __name__ label to the end of the query evaluation. This is experimental and enabled under the feature-flag promql-delayed-name-removal. #14477
• [ENHANCEMENT] PromQL: Experimental sort_by_label and sort_by_label_desc sort by all labels when label is equal. #14655, #14985
• [ENHANCEMENT] PromQL: Clarify error message logged when Go runtime panic occurs during query evaluation. #14621
• [ENHANCEMENT] PromQL: Use Kahan summation for better accuracy in avg and avg_over_time. #14413
• [ENHANCEMENT] Tracing: Improve PromQL tracing, including showing the operation performed for aggregates, operators, and calls. #14816
• [ENHANCEMENT] API: Support multiple listening addresses. #14665
• [ENHANCEMENT] TSDB: Backward compatibility with upcoming index v3. #14934
• [PERF] TSDB: Query in-order and out-of-order series together. #14354, #14693, #14714, #14831, #14874, #14948, #15120
• [PERF] TSDB: Streamline reading of overlapping out-of-order head chunks. #14729
• [BUGFIX] PromQL: make sort_by_label stable. #14985
• [BUGFIX] SD: Fix dropping targets (with feature flag new-service-discovery-manager). #13147
• [BUGFIX] SD: Stop storing stale targets (with feature flag new-service-discovery-manager). #13622
• [BUGFIX] Scraping: exemplars could be dropped in protobuf scraping. #14810
• [BUGFIX] Remote-Write: fix metadata sending for experimental Remote-Write V2. #14766
• [BUGFIX] Remote-Write: Return 4xx not 5xx when timeseries has duplicate label. #14716
• [BUGFIX] Experimental Native Histograms: many fixes for incorrect results, panics, warnings. #14513, #14575, #14598, #14609, #14611, #14771, #14821
• [BUGFIX] TSDB: Only count unknown record types in record_decode_failures_total metric. #14042

New Contributors

• @maxamins made their first contribution in #14346
• @cuiweiyuan made their first contribution in #14626
• @harshitasao made their first contribution in #14690
• @patilsuraj767 made their first contribution in #14403
• @riskrole made their first contribution in #14751
• @jcreixell made their first contribution in #14477
• @kevinrawal made their first contribution in #14765
• @electron0zero made their first contribution in #14650
• @shandongzhejiang made their first contribution in #14700

Full Changelog: v2.54.1...v2.55.0