v2.55.1

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• [BUGFIX] round() function did not remove __name__ label. #​15250

v2.55.0

Compare Source

• [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