Update prom/prometheus Docker tag to v3.9.1

[renovate]

This PR contains the following updates:

Package	Update	Change
prom/prometheus	minor	v3.1.0 → v3.9.1

---

Release Notes

prometheus/prometheus (prom/prometheus)

v3.9.1

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v3.9.0

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v3.8.1: 3.8.1 / 2025-12-16

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• [BUGFIX] remote: Fix Remote Write receiver, so it does not send wrong response headers for v1 flow and cause Prometheus senders to emit false partial error log and metrics. #​17683

v3.8.0: 3.8.0 / 2025-11-28

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Note for users of Native Histograms

This is the first release with Native Histograms as a stable feature. However, scraping Native Histograms has to be activated explicitly via the scrape_native_histograms config setting (newly introduced in this release). To ease the transition, the --enable-feature=native-histograms flag is not a complete no-op in this release, but changes the default value of scrape_native_histograms to true. In the next release (v3.9), the feature flag will be a complete no-op, and the default value of scrape_native_histograms will always be false. If you have been using the feature flag so far, the recommended course of action is the following:

1. Upgrade to v3.8 and keep the feature flag. Everything should work as before.
2. At your own pace, set scrape_native_histograms to true in all relevant scrape configs. (There is a global and a per-scrape-config version of scrape_native_histograms, allowing granular control if needed. It is a good idea to also set scrape_native_histograms explicitly to false where you do not want to scrape Native Histograms. In this way, you do not depend on the default value of the setting anymore.)
3. Remove the feature flag and make sure that everything still works as intended.
4. Now you are ready for an upgrade to the next release (v3.9).

Changelog

• [CHANGE] Remote-write 2 (receiving): Update to 2.0-rc.4 spec. "created timestamp" (CT) is now called "start timestamp" (ST). #​17411
• [CHANGE] TSDB: Native Histogram Custom Bounds with a NaN threshold are now rejected. #​17287
• [FEATURE] OAuth2: support jwt-bearer grant-type (RFC7523 3.1). #​17592
• [FEATURE] Dockerfile: Add OpenContainers spec labels to Dockerfile. #​16483
• [FEATURE] SD: Add unified AWS service discovery for ec2, lightsail and ecs services. #​17046
• [FEATURE] Native histograms are now a stable, but optional feature, use the scrape_native_histograms config setting. #​17232 #​17315
• [FEATURE] UI: Support anchored and smoothed keyword in promql editor. #​17239
• [FEATURE] UI: Show detailed relabeling steps for each discovered target. #​17337
• [FEATURE] Alerting: Add urlQueryEscape to template functions. #​17403
• [FEATURE] Promtool: Add Remote-Write 2.0 support to promtool push metrics via the --protobuf_message flag. #​17417
• [ENHANCEMENT] Clarify the docs about handling negative native histograms. #​17249
• [ENHANCEMENT] Mixin: Add static UID to the remote-write dashboard. #​17256
• [ENHANCEMENT] PromQL: Reconcile mismatched NHCB bounds in Add and Sub. #​17278
• [ENHANCEMENT] Alerting: Add "unknown" state for alerting rules that haven't been evaluated yet. #​17282
• [ENHANCEMENT] Scrape: Allow simultaneous use of classic histogram → NHCB conversion and zero-timestamp ingestion. #​17305
• [ENHANCEMENT] UI: Add smoothed/anchored in explain. #​17334
• [ENHANCEMENT] OTLP: De-duplicate any target_info samples with the same timestamp for the same series. #​17400
• [ENHANCEMENT] Document use_fips_sts_endpoint in sigv4 config sections. #​17304
• [ENHANCEMENT] Document Prometheus Agent. #​14519
• [PERF] PromQL: Speed up parsing of variadic functions. #​17316
• [PERF] UI: Speed up alerts/rules/... pages by not rendering collapsed content. #​17485
• [PERF] UI: Performance improvement when getting label name and values in promql editor. #​17194
• [PERF] UI: Speed up /alerts for many firing alerts via virtual scrolling. #​17254
• [BUGFIX] PromQL: Fix slice indexing bug in info function on churning series. #​17199
• [BUGFIX] API: Reduce lock contention on /api/v1/targets. #​17306
• [BUGFIX] PromQL: Consistent handling of gauge vs. counter histograms in aggregations. #​17312
• [BUGFIX] TSDB: Allow NHCB with -Inf as the first custom value. #​17320
• [BUGFIX] UI: Fix duplicate loading of data from the API speed up rendering of some pages. #​17357
• [BUGFIX] Old UI: Fix createExpressionLink to correctly build /graph URLs so links from Alerts/Rules work again. #​17365
• [BUGFIX] PromQL: Avoid panic when parsing malformed info call. #​17379
• [BUGFIX] PromQL: Include histograms when enforcing sample_limit. #​17390
• [BUGFIX] Config: Fix panic if TLS CA file is absent. #​17418
• [BUGFIX] PromQL: Fix histogram_fraction for classic histograms and NHCB if lower bound is in the first bucket. #​17424

v3.7.3: 3.7.3 / 2025-10-29

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• [BUGFIX] UI: Revert changed (and breaking) redirect behavior for -web.external-url if -web.route-prefix is configured, which was introduced in #​17240. #​17389
• [BUGFIX] Fix federation of some native histograms. #​17299 #​17409
• [BUGFIX] promtool: check config would fail when --lint=none flag was set. #​17399 #​17414
• [BUGFIX] Remote-write: fix a deadlock in the queue resharding logic that can lead to suboptimal queue behavior. #​17412

v3.7.2: 3.7.2 / 2025-10-22

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• [BUGFIX] AWS SD: Fix AWS SDK v2 credentials handling for EC2 and Lightsail discovery. #​17355
• [BUGFIX] AWS SD: Load AWS region from IMDS when not set. #​17376
• [BUGFIX] Relabeling: Fix labelmap action validation with the legacy metric name validation scheme. #​17372
• [BUGFIX] PromQL: Fix parsing failure when anchored and smoothed are used as metric names and label names. #​17353
• [BUGFIX] PromQL: Fix formatting of range vector selectors with smoothed/anchored modifier. #​17354

v3.7.1: 3.7.1 / 2025-10-16

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• [BUGFIX] OTLP: Prefix key_ to label name when translating an OTel attribute name starting with a single underscore, and keep multiple consecutive underscores in label name when translating an OTel attribute name. This reverts the breaking changes introduced in 3.7.0. #​17344

v3.7.0: 3.7.0 / 2025-10-15

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Warning

We discovered a breaking change in the OTLP endpoint: OpenTelemetry attribute names starting with underscore, for example _attrib, are no longer automatically translated to key_attrib. Please use 3.7.1 instead for OTLP ingestion.

Changelog

• [CHANGE] Remote-write: the following metrics are deprecated:
  • prometheus_remote_storage_samples_in_total, use prometheus_wal_watcher_records_read_total{type="samples"} and prometheus_remote_storage_samples_dropped_total instead,
  • prometheus_remote_storage_histograms_in_total, use prometheus_wal_watcher_records_read_total{type=~".*histogram_samples"} and prometheus_remote_storage_histograms_dropped_total instead,
  • prometheus_remote_storage_exemplars_in_total, use prometheus_wal_watcher_records_read_total{type="exemplars"} and prometheus_remote_storage_exemplars_dropped_total instead,
  • prometheus_remote_storage_highest_timestamp_in_seconds, use the more accurate prometheus_remote_storage_queue_highest_timestamp_seconds instead in dashboards and alerts to properly account for relabeling and for more accuracy. #​17065
• [FEATURE] PromQL: Add support for experimental anchored and smoothed rate behind feature flag promql-extended-range-selectors. #​16457
• [FEATURE] Federation: Add support for native histograms with custom buckets (NHCB). #​17215
• [FEATURE] PromQL: Add first_over_time(...) and ts_of_first_over_time(...) behind feature flag experimental-promql-functions. #​16963 #​17021
• [FEATURE] Remote-write: Add support for Azure Workload Identity as an authentication method for the receiver. #​16788
• [FEATURE] Remote-write: Add type and unit labels to outgoing time series in remote-write 2.0 when the type-and-unit-labels feature flag is enabled. #​17033
• [FEATURE] OTLP: Write start time of metrics as created time zero samples into TSDB when created-timestamp-zero-ingestion feature flag is enabled. #​16951
• [ENHANCEMENT] PromQL: Add warn-level annotations for counter reset conflicts in certain histogram operations. #​17051 #​17094
• [ENHANCEMENT] UI: Add scrape interval and scrape timeout to targets page. #​17158
• [ENHANCEMENT] TSDB: Reduce the resolution of native histograms read from chunks or remote read if the schema is exponential. #​17213
• [ENHANCEMENT] Remote write: Add logging for unexpected metadata in sample batches, when metadata entries are found in samples-only batches. #​17034 #​17082
• [ENHANCEMENT] Rules: Support concurrent evaluation for rules querying ALERTS and ALERTS_FOR_STATE. #​17064
• [ENHANCEMENT] TSDB: Add logs to improve visibility into internal operations. #​17074
• [PERF] OTLP: Write directly to TSDB instead of passing through a Remote-Write adapter when receiving OTLP metrics. #​16951
• [PERF] OTLP: Reduce number of logs emitted from OTLP endpoint. No need to log duplicate sample errors. #​17201
• [PERF] PromQL: Move more work to preprocessing step. #​16896
• [PERF] PromQL: Reduce allocations when walking the syntax tree. #​16593
• [PERF] TSDB: Optimize appender creation, slightly speeding up startup. #​16922
• [PERF] TSDB: Improve speed of querying a series with multiple matchers. #​13971
• [BUGFIX] Alerting: Mutating alerts relabeling (using replace actions, etc.) within a alertmanager_config.alert_relabel_configs block is now scoped correctly and no longer yields altered alerts to subsequent blocks. #​17063
• [BUGFIX] Config: Infer valid escaping scheme when scrape config validation scheme is set. #​16923
• [BUGFIX] TSDB: Correctly handle appending mixed-typed samples to the same series. #​17071 #​17241 #​17290 #​17295 #​17296
• [BUGFIX] Remote-write: Prevent sending unsupported native histograms with custom buckets (NHCB) over Remote-write 1.0, log warning. #​17146
• [BUGFIX] TSDB: Fix metadata entries handling on metadata-wal-records experimental feature for native histograms with custom buckets (NHCB) in protobuf scraping. #​17156
• [BUGFIX] TSDB: Ignore Native Histograms with invalid schemas during WAL/WBL replay. #​17214
• [BUGFIX] PromQL: Avoid empty metric names in annotations for histogram_quantile(). #​16794
• [BUGFIX] PromQL: Correct inaccurate character positions in errors for some aggregate expressions. #​16996 #​17031
• [BUGFIX] PromQL: Fix info() function on churning series. #​17135
• [BUGFIX] PromQL: Set native histogram to gauge type when subtracting or multiplying/dividing with negative factors. #​17004
• [BUGFIX] TSDB: Reject unsupported native histogram schemas when attempting to append to TSDB. For scrape and remote-write implement reducing the resolution to fit the maximum if the schema is within the -9 to 52. #​17189
• [BUGFIX] Remote-write: Fix HTTP handler to return after writing error response for invalid compression. #​17050
• [BUGFIX] Remote-write: Return HTTP error 400 instead of 5xx for wrongly formatted Native Histograms. #​17210
• [BUGFIX] Scrape: Prevent staleness markers from generating unnecessary series. #​16429
• [BUGFIX] TSDB: Avoid misleading Failed to calculate size of \"wal\" dir error logs during WAL clean-up. #​17006
• [BUGFIX] TSDB: Prevent erroneously dropping series records during WAL checkpoints. #​17029
• [BUGFIX] UI: Fix redirect to path of -web.external-url if -web.route-prefix is configured. #​17240
• [BUGIFX] Remote-write: Do not panic on invalid symbol table in remote-write 2.0. #​17160

v3.6.0: 3.6.0 / 2025-09-17

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• [FEATURE] PromQL: Add step(), and min() and max() on durations, behind feature flag promql-duration-expr. #​16777
• [FEATURE] API: Add a /v1/status/tsdb/blocks endpoint exposing metadata about loaded blocks. #​16695
• [FEATURE] Templates: Add toDuration() and now() functions. #​16619
• [ENHANCEMENT] Discovery: Add support for attaching namespace metadata to targets. #​16831
• [ENHANCEMENT] OTLP: Support new UnderscoreEscapingWithoutSuffixes strategy via otlp.translation_strategy. #​16849
• [ENHANCEMENT] OTLP: Support including scope metadata as metric labels via otlp.promote_scope_metadata. #​16878
• [ENHANCEMENT] OTLP: Add __type__ and __unit__ labels when feature flag type-and-unit-labels is enabled. #​16630
• [ENHANCEMENT] Tracing: Send the traceparent HTTP header during scrapes. #​16425
• [ENHANCEMENT] UI: Add option to disable info and warning query messages under Query page settings. #​16901
• [ENHANCEMENT] UI: Improve metadata handling for _count/_sum/_bucket suffixes. #​16910
• [ENHANCEMENT] TSDB: Track stale series in the Head block via the prometheus_tsdb_head_stale_series metric. #​16925
• [PERF] PromQL: Improve performance due to internal optimizations. #​16797
• [BUGFIX] Config: Fix "unknown global name escaping method" error messages produced during config validation. #​16801
• [BUGFIX] Discovery: Fix race condition during shutdown. #​16820
• [BUGFIX] OTLP: Generate target_info samples between the earliest and latest samples per resource. #​16737
• [BUGFIX] PromQL: Fail when NaN is passed as parameter to topk(), bottomk(), limitk() and limit_ratio(). #​16725
• [BUGFIX] PromQL: Fix extrapolation for native counter histograms. #​16828
• [BUGFIX] PromQL: Reduce numerical errors by disabling some optimizations. #​16895
• [BUGFIX] PromQL: Fix inconsistencies when using native histograms in subqueries. #​16879
• [BUGFIX] PromQL: Fix inconsistent annotations for rate() and increase() on histograms when feature flag type-and-unit-labels is enabled. #​16915
• [BUGFIX] Scraping: Fix memory corruption in slicelabels builds. #​16946
• [BUGFIX] TSDB: Fix panic on append when feature flag created-timestamp-zero-ingestion is enabled. #​16332
• [BUGFIX] TSDB: Fix panic on append for native histograms with empty buckets. #​16893

v3.5.0: 3.5.0 / 2025-07-14

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3.5 is a Long Term Support (LTS) release; see release https://prometheus.io/docs/introduction/release-cycle/
There are a number of new features, and no known breaking changes in this release:

• [FEATURE] PromQL: Add experimental type and unit metadata labels, behind feature flag type-and-unit-labels. #​16228 #​16632 #​16718 #​16743
• [FEATURE] PromQL: Add ts_of_(min|max|last)_over_time, behind feature flag experimental-promql-functions. #​16722 #​16733
• [FEATURE] Scraping: Add global option always_scrape_classic_histograms to scrape a classic histogram even if it is also exposed as native. #​16452
• [FEATURE] OTLP: New config options promote_all_resource_attributes and ignore_resource_attributes. #​16426
• [FEATURE] Discovery: New service discovery for STACKIT Cloud. #​16401
• [ENHANCEMENT] Hetzner SD: Add label_selector to filter servers. #​16512
• [ENHANCEMENT] PromQL: support non-constant parameter in aggregations like quantile and topk. #​16404
• [ENHANCEMENT] UI: Better total target count display when using keep_dropped_targets option. #​16604
• [ENHANCEMENT] UI: Add simple filtering on the /rules page. #​16605
• [ENHANCEMENT] UI: Display query stats in hover tooltip over table query tab. #​16723
• [ENHANCEMENT] UI: Clear search field on /targets page. #​16567
• [ENHANCEMENT] Rules: Check that rules parse without error earlier at startup. #​16601
• [ENHANCEMENT] Promtool: Optional fuzzy float64 comparison in rules unittests. #​16395
• [PERF] PromQL: Reuse histogramStatsIterator where possible. #​16686
• [PERF] PromQL: Reuse storage for custom bucket values for native histograms. #​16565
• [PERF] UI: Optimize memoization and search debouncing on /targets page. #​16589
• [PERF] UI: Fix full-page re-rendering when opening status nav menu. #​16590
• [PERF] Kubernetes SD: use service cache.Indexer to achieve better performance. #​16365
• [PERF] TSDB: Optionally use Direct IO for chunks writing. #​15365
• [PERF] TSDB: When fetching label values, stop work earlier if the limit is reached. #​16158
• [PERF] Labels: Simpler/faster stringlabels encoding. #​16069
• [PERF] Scraping: Reload scrape pools concurrently. #​16595 #​16783
• [BUGFIX] Top-level: Update GOGC before loading TSDB. #​16491
• [BUGFIX] Config: Respect GOGC environment variable if no "runtime" block exists. #​16558
• [BUGFIX] PromQL: Fix native histogram last_over_time. #​16744
• [BUGFIX] PromQL: Fix reported parser position range in errors for aggregations wrapped in ParenExpr #​16041 #​16754
• [BUGFIX] PromQL: Don't emit a value from histogram_fraction or histogram_quantile if classic and native histograms are present at the same timestamp. #​16552
• [BUGFIX] PromQL: Incorrect rounding of [1001ms] to [1s] and similar. #​16478
• [BUGFIX] PromQL: Fix inconsistent / sometimes negative histogram_count and histogram_sum. #​16682
• [BUGFIX] PromQL: Improve handling of NaNs in native histograms. #​16724
• [BUGFIX] PromQL: Fix unary operator precedence in duration expressions. #​16713
• [BUGFIX] PromQL: Improve consistency of avg aggregation and avg_over_time. #​16569 #​16773
• [BUGFIX] UI: Add query warnings and info to graph view. #​16753 #​16759
• [BUGFIX] API: Add HTTP Vary: Origin header to responses to avoid cache poisoning. #​16008
• [BUGFIX] Discovery: Avoid deadlocks by taking locks in consistent order. #​16587
• [BUGFIX] Remote-write: For Azure AD auth, allow empty client_id to suppport system assigned managed identity. #​16421
• [BUGFIX] Scraping: Fix rare memory corruption bug. #​16623
• [BUGFIX] Scraping: continue handling custom-bucket histograms after an exponential histogram is encountered. #​16720
• [BUGFIX] OTLP: Default config not respected when otlp: block is unset. #​16693

v3.4.2: 3.4.2 / 2025-06-26

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• [BUGFIX] OTLP receiver: Fix default configuration not being respected if the otlp: block is unset in the config file. #​16693

v3.4.1: 3.4.1 / 2025-05-31

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• [BUGFIX] Parser: Add reproducer for a dangling-reference issue in parsers. #​16633

v3.4.0: 3.4.0 / 2025-05-17

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• [CHANGE] Config: Make setting out-of-order native histograms feature (--enable-feature=ooo-native-histograms) a no-op. Out-of-order native histograms are now always enabled when out_of_order_time_window is greater than zero and --enable-feature=native-histograms is set. #​16207
• [FEATURE] OTLP translate: Add feature flag for optionally translating OTel explicit bucket histograms into native histograms with custom buckets. #​15850
• [FEATURE] OTLP translate: Add option to receive OTLP metrics without translating names or attributes. #​16441
• [FEATURE] PromQL: allow arithmetic operations in durations in PromQL parser. #​16249
• [FEATURE] OTLP receiver: Add primitive support for ingesting OTLP delta metrics as-is. #​16360
• [ENHANCEMENT] PromQL: histogram_fraction for bucket histograms. #​16095
• [ENHANCEMENT] TSDB: add prometheus_tsdb_wal_replay_unknown_refs_total and prometheus_tsdb_wbl_replay_unknown_refs_total metrics to track unknown series references during WAL/WBL replay. #​16166
• [ENHANCEMENT] Scraping: Add config option for escaping scheme request. #​16066
• [ENHANCEMENT] Config: Add global config option for convert_classic_histograms_to_nhcb. #​16226
• [ENHANCEMENT] Alerting: make batch size configurable (--alertmanager.notification-batch-size). #​16254
• [PERF] Kubernetes SD: make endpointSlice discovery more efficient. #​16433
• [BUGFIX] Config: Fix auto-reload on changes to rule and scrape config files. #​16340
• [BUGFIX] Scraping: Skip native histogram series if ingestion is disabled. #​16218
• [BUGFIX] TSDB: Handle metadata/tombstones/exemplars for duplicate series during WAL replay. #​16231
• [BUGFIX] TSDB: Avoid processing exemplars outside the valid time range during WAL replay. #​16242
• [BUGFIX] Promtool: Add feature flags for PromQL features. #​16443
• [BUGFIX] Rules: correct logging of alert name & template data. #​15093
• [BUGFIX] PromQL: Use arithmetic mean for histogram_stddev() and histogram_stdvar() . #​16444

v3.3.1: 3.3.1 / 2025-05-02

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• [BUGFIX] Azure SD: Fix panic on malformed log message. #​16434 #​16210
• [BUGFIX] Config: Update GOGC before loading TSDB. #​16491

v3.3.0: 3.3.0 / 2025-04-15

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• [FEATURE] PromQL: Implement idelta() and irate() for native histograms. #​15853
• [ENHANCEMENT] Scaleway SD: Add __meta_scaleway_instance_public_ipv4_addresses and __meta_scaleway_instance_public_ipv6_addresses labels. #​14228
• [ENHANCEMENT] TSDB: Reduce locking while reloading blocks. #​12920
• [ENHANCEMENT] PromQL: Allow UTF-8 labels in label_replace(). #​15974
• [ENHANCEMENT] Promtool: tsdb create-blocks-from openmetrics can now read from a Pipe. #​16011
• [ENHANCEMENT] Rules: Add support for anchors and aliases in rule files. #​14957
• [ENHANCEMENT] Dockerfile: Make /prometheus writable. #​16073
• [ENHANCEMENT] API: Include scrape pool name for dropped targets in /api/v1/targets. #​16085
• [ENHANCEMENT] UI: Improve time formatting and copying of selectors. #​15999 #​16165
• [ENHANCEMENT] UI: Bring back vertical grid lines and graph legend series toggling instructions. #​16163 #​16164
• [ENHANCEMENT] Mixin: The cluster label can be customized using clusterLabel. #​15826
• [PERF] TSDB: Optimize some operations on head chunks by taking shortcuts. #​12659
• [PERF] TSDB & Agent: Reduce memory footprint during WL replay. #​15778
• [PERF] Remote-Write: Reduce memory footprint during WAL replay. #​16197
• [PERF] API: Reduce memory footprint during header parsing. #​16001
• [PERF] Rules: Improve dependency evaluation, enabling better concurrency. #​16039
• [PERF] Scraping: Improve scraping performance for native histograms. #​15731
• [PERF] Scraping: Improve parsing of created timestamps. #​16072
• [BUGFIX] Scraping: Bump cache iteration after error to avoid false duplicate detections. #​16174
• [BUGFIX] Scraping: Skip native histograms series when ingestion is disabled. #​16218
• [BUGFIX] PromQL: Fix counter reset detection for native histograms. #​15902 #​15987
• [BUGFIX] PromQL: Fix inconsistent behavior with an empty range. #​15970
• [BUGFIX] PromQL: Fix inconsistent annotation in quantile_over_time(). #​16018
• [BUGFIX] PromQL: Prevent label_join() from producing duplicates. #​15975
• [BUGFIX] PromQL: Ignore native histograms in scalar(), sort() and sort_desc(). #​15964
• [BUGFIX] PromQL: Fix annotations for binary operations between incompatible native histograms. #​15895
• [BUGFIX] Alerting: Consider alert relabeling when deciding whether alerts are dropped. #​15979
• [BUGFIX] Config: Set GoGC to the default value in case of an empty configuration. #​16052
• [BUGFIX] TSDB: Fix unknown series errors and potential data loss during WAL replay when inactive series are removed from the head and reappear before the next WAL checkpoint. #​16060
• [BUGFIX] Scaleway SD: The public IP will no longer be set to __meta_meta_scaleway_instance_public_ipv4 if it is an IPv6 address. #​14228
• [BUGFIX] UI: Display the correct value of Alerting rules' keep_firing_for. #​16211

v3.2.1: 3.2.1 / 2025-02-25

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• [BUGFIX] Don't send Accept header escape=allow-utf-8 when metric_name_validation_scheme: legacy is configured. #​16061

v3.2.0: 3.2.0 / 2025-02-17

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Prometheus v3.2.0 Changelog

• [CHANGE] relabel: Replace actions can now use UTF-8 characters in targetLabel field. Note that $<chars> or ${<chars>} will be expanded. This also apply to replacement field for LabelMap action. #​15851
• [CHANGE] rulefmt: Rule names can use UTF-8 characters, except { and } characters (due to common mistake checks). #​15851
• [FEATURE] remote/otlp: Add feature flag otlp-deltatocumulative to support conversion from delta to cumulative. #​15165
• [ENHANCEMENT] openstack SD: Discover Octavia loadbalancers. #​15539
• [ENHANCEMENT] scrape: Add metadata for automatic metrics to WAL for metadata-wal-records feature. #​15837
• [ENHANCEMENT] promtool: Support linting of scrape interval, through lint option too-long-scrape-interval. #​15719
• [ENHANCEMENT] promtool: Add --ignore-unknown-fields option. #​15706
• [ENHANCEMENT] ui: Make "hide empty rules" and hide empty rules" persistent #​15807
• [ENHANCEMENT] web/api: Add a limit parameter to /query and /query_range. #​15552
• [ENHANCEMENT] api: Add fields Node and ServerTime to /status. #​15784
• [PERF] Scraping: defer computing labels for dropped targets until they are needed by the UI. #​15261
• [BUGFIX] remotewrite2: Fix invalid metadata bug for metrics without metadata. #​15829
• [BUGFIX] remotewrite2: Fix the unit field propagation. #​15825
• [BUGFIX] scrape: Fix WAL metadata for histograms and summaries. #​15832
• [BUGFIX] ui: Merge duplicate "Alerts page settings" sections. #​15810
• [BUGFIX] PromQL: Fix <aggr_over_time> functions with histograms. #​15711

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