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chore(deps): update prom/prometheus docker tag to v3.9.1 (#417)
This PR contains the following updates:
| Package | Update | Change |
|---|---|---|
| [prom/prometheus](https://redirect.github.com/prometheus/prometheus) |
minor | `v3.7.3` → `v3.9.1` |
---
### Release Notes
<details>
<summary>prometheus/prometheus (prom/prometheus)</summary>
###
[`v3.9.1`](https://redirect.github.com/prometheus/prometheus/releases/tag/v3.9.1):
3.9.1 / 2026-01-07
[Compare
Source](https://redirect.github.com/prometheus/prometheus/compare/v3.9.0...v3.9.1)
- \[BUGFIX] Agent: fix crash shortly after startup from invalid type of
object.
[#​17802](https://redirect.github.com/prometheus/prometheus/issues/17802)
- \[BUGFIX] Scraping: fix relabel keep/drop not working.
[#​17807](https://redirect.github.com/prometheus/prometheus/issues/17807)
###
[`v3.9.0`](https://redirect.github.com/prometheus/prometheus/releases/tag/v3.9.0):
3.9.0 / 2026-01-06
[Compare
Source](https://redirect.github.com/prometheus/prometheus/compare/v3.8.1...v3.9.0)
#### Note for users of Native Histograms
In version 3.9, Native Histograms is no longer experimental, and the
feature flag `native-histogram` has no effect. You must now turn on
the config setting `scrape_native_histograms` to collect Native
Histogram samples from exporters.
#### Changelog
- \[CHANGE] Native Histograms are no longer experimental! Make the
`native-histogram` feature flag a no-op. Use `scrape_native_histograms`
config option instead.
[#​17528](https://redirect.github.com/prometheus/prometheus/issues/17528)
- \[CHANGE] API: Add maximum limit of 10,000 sets of statistics to TSDB
status endpoint.
[#​17647](https://redirect.github.com/prometheus/prometheus/issues/17647)
- \[FEATURE] API: Add /api/v1/features for clients to understand which
features are supported.
[#​17427](https://redirect.github.com/prometheus/prometheus/issues/17427)
- \[FEATURE] Promtool: Add `start_timestamp` field for unit tests.
[#​17636](https://redirect.github.com/prometheus/prometheus/issues/17636)
- \[FEATURE] Promtool: Add `--format seriesjson` option to `tsdb dump`
to output just series labels in JSON format.
[#​13409](https://redirect.github.com/prometheus/prometheus/issues/13409)
- \[FEATURE] Add `--storage.tsdb.delay-compact-file.path` flag for
better interoperability with Thanos.
[#​17435](https://redirect.github.com/prometheus/prometheus/issues/17435)
- \[FEATURE] UI: Add an option on the query drop-down menu to duplicate
that query panel.
[#​17714](https://redirect.github.com/prometheus/prometheus/issues/17714)
- \[ENHANCEMENT]: TSDB: add flag `--storage.tsdb.block-reload-interval`
to configure TSDB Block Reload Interval.
[#​16728](https://redirect.github.com/prometheus/prometheus/issues/16728)
- \[ENHANCEMENT] UI: Add graph option to start the chart's Y axis at
zero.
[#​17565](https://redirect.github.com/prometheus/prometheus/issues/17565)
- \[ENHANCEMENT] Scraping: Classic protobuf format no longer requires
the unit in the metric name.
[#​16834](https://redirect.github.com/prometheus/prometheus/issues/16834)
- \[ENHANCEMENT] PromQL, Rules, SD, Scraping: Add native histograms to
complement existing summaries.
[#​17374](https://redirect.github.com/prometheus/prometheus/issues/17374)
- \[ENHANCEMENT] Notifications: Add a histogram
`prometheus_notifications_latency_histogram_seconds` to complement the
existing summary.
[#​16637](https://redirect.github.com/prometheus/prometheus/issues/16637)
- \[ENHANCEMENT] Remote-write: Add custom scope support for AzureAD
authentication.
[#​17483](https://redirect.github.com/prometheus/prometheus/issues/17483)
- \[ENHANCEMENT] SD: add a `config` label with job name for most
`prometheus_sd_refresh` metrics.
[#​17138](https://redirect.github.com/prometheus/prometheus/issues/17138)
- \[ENHANCEMENT] TSDB: New histogram `prometheus_tsdb_sample_ooo_delta`,
the distribution of out-of-order samples in seconds. Collected for all
samples, accepted or not.
[#​17477](https://redirect.github.com/prometheus/prometheus/issues/17477)
- \[ENHANCEMENT] Remote-read: Validate histograms received via
remote-read.
[#​17561](https://redirect.github.com/prometheus/prometheus/issues/17561)
- \[PERF] TSDB: Small optimizations to postings index.
[#​17439](https://redirect.github.com/prometheus/prometheus/issues/17439)
- \[PERF] Scraping: Speed up relabelling of series.
[#​17530](https://redirect.github.com/prometheus/prometheus/issues/17530)
- \[PERF] PromQL: Small optimisations in binary operators.
[#​17524](https://redirect.github.com/prometheus/prometheus/issues/17524),
[#​17519](https://redirect.github.com/prometheus/prometheus/issues/17519).
- \[BUGFIX] UI: PromQL autocomplete now shows the correct type and HELP
text for OpenMetrics counters whose samples end in `_total`.
[#​17682](https://redirect.github.com/prometheus/prometheus/issues/17682)
- \[BUGFIX] UI: Fixed codemirror-promql incorrectly showing label
completion suggestions after the closing curly brace of a vector
selector.
[#​17602](https://redirect.github.com/prometheus/prometheus/issues/17602)
- \[BUGFIX] UI: Query editor no longer suggests a duration unit if one
is already present after a number.
[#​17605](https://redirect.github.com/prometheus/prometheus/issues/17605)
- \[BUGFIX] PromQL: Fix some "vector cannot contain metrics with the
same labelset" errors when experimental delayed name removal is enabled.
[#​17678](https://redirect.github.com/prometheus/prometheus/issues/17678)
- \[BUGFIX] PromQL: Fix possible corruption of PromQL text if the query
had an empty `ignoring()` and non-empty grouping.
[#​17643](https://redirect.github.com/prometheus/prometheus/issues/17643)
- \[BUGFIX] PromQL: Fix resets/changes to return empty results for
anchored selectors when all samples are outside the range.
[#​17479](https://redirect.github.com/prometheus/prometheus/issues/17479)
- \[BUGFIX] PromQL: Check more consistently for many-to-one matching in
filter binary operators.
[#​17668](https://redirect.github.com/prometheus/prometheus/issues/17668)
- \[BUGFIX] PromQL: Fix collision in unary negation with non-overlapping
series.
[#​17708](https://redirect.github.com/prometheus/prometheus/issues/17708)
- \[BUGFIX] PromQL: Fix collision in label\_join and label\_replace with
non-overlapping series.
[#​17703](https://redirect.github.com/prometheus/prometheus/issues/17703)
- \[BUGFIX] PromQL: Fix bug with inconsistent results for queries with
OR expression when experimental delayed name removal is enabled.
[#​17161](https://redirect.github.com/prometheus/prometheus/issues/17161)
- \[BUGFIX] PromQL: Ensure that `rate`/`increase`/`delta` of histograms
results in a gauge histogram.
[#​17608](https://redirect.github.com/prometheus/prometheus/issues/17608)
- \[BUGFIX] PromQL: Do not panic while iterating over invalid
histograms.
[#​17559](https://redirect.github.com/prometheus/prometheus/issues/17559)
- \[BUGFIX] TSDB: Reject chunk files whose encoded chunk length
overflows int.
[#​17533](https://redirect.github.com/prometheus/prometheus/issues/17533)
- \[BUGFIX] TSDB: Do not panic during resolution reduction of invalid
histograms.
[#​17561](https://redirect.github.com/prometheus/prometheus/issues/17561)
- \[BUGFIX] Remote-write Receive: Avoid duplicate labels when
experimental type-and-unit-label feature is enabled.
[#​17546](https://redirect.github.com/prometheus/prometheus/issues/17546)
- \[BUGFIX] OTLP Receiver: Only write metadata to disk when experimental
metadata-wal-records feature is enabled.
[#​17472](https://redirect.github.com/prometheus/prometheus/issues/17472)
###
[`v3.8.1`](https://redirect.github.com/prometheus/prometheus/releases/tag/v3.8.1):
3.8.1 / 2025-12-16
[Compare
Source](https://redirect.github.com/prometheus/prometheus/compare/v3.8.0...v3.8.1)
- \[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](https://redirect.github.com/prometheus/prometheus/issues/17683)
###
[`v3.8.0`](https://redirect.github.com/prometheus/prometheus/releases/tag/v3.8.0):
3.8.0 / 2025-11-28
[Compare
Source](https://redirect.github.com/prometheus/prometheus/compare/v3.7.3...v3.8.0)
#### 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](https://redirect.github.com/prometheus/docs/blob/60c24e450010df38cfcb4f65df874f6f9b26dbcb/docs/specs/prw/remote_write_spec_2_0.md).
"created timestamp" (CT) is now called "start timestamp" (ST).
[#​17411](https://redirect.github.com/prometheus/prometheus/issues/17411)
- \[CHANGE] TSDB: Native Histogram Custom Bounds with a NaN threshold
are now rejected.
[#​17287](https://redirect.github.com/prometheus/prometheus/issues/17287)
- \[FEATURE] OAuth2: support jwt-bearer grant-type (RFC7523 3.1).
[#​17592](https://redirect.github.com/prometheus/prometheus/issues/17592)
- \[FEATURE] Dockerfile: Add OpenContainers spec labels to Dockerfile.
[#​16483](https://redirect.github.com/prometheus/prometheus/issues/16483)
- \[FEATURE] SD: Add unified AWS service discovery for ec2, lightsail
and ecs services.
[#​17046](https://redirect.github.com/prometheus/prometheus/issues/17046)
- \[FEATURE] Native histograms are now a stable, but optional feature,
use the `scrape_native_histograms` config setting.
[#​17232](https://redirect.github.com/prometheus/prometheus/issues/17232)
[#​17315](https://redirect.github.com/prometheus/prometheus/issues/17315)
- \[FEATURE] UI: Support anchored and smoothed keyword in promql editor.
[#​17239](https://redirect.github.com/prometheus/prometheus/issues/17239)
- \[FEATURE] UI: Show detailed relabeling steps for each discovered
target.
[#​17337](https://redirect.github.com/prometheus/prometheus/issues/17337)
- \[FEATURE] Alerting: Add urlQueryEscape to template functions.
[#​17403](https://redirect.github.com/prometheus/prometheus/issues/17403)
- \[FEATURE] Promtool: Add Remote-Write 2.0 support to `promtool push
metrics` via the `--protobuf_message` flag.
[#​17417](https://redirect.github.com/prometheus/prometheus/issues/17417)
- \[ENHANCEMENT] Clarify the docs about handling negative native
histograms.
[#​17249](https://redirect.github.com/prometheus/prometheus/issues/17249)
- \[ENHANCEMENT] Mixin: Add static UID to the remote-write dashboard.
[#​17256](https://redirect.github.com/prometheus/prometheus/issues/17256)
- \[ENHANCEMENT] PromQL: Reconcile mismatched NHCB bounds in `Add` and
`Sub`.
[#​17278](https://redirect.github.com/prometheus/prometheus/issues/17278)
- \[ENHANCEMENT] Alerting: Add "unknown" state for alerting rules that
haven't been evaluated yet.
[#​17282](https://redirect.github.com/prometheus/prometheus/issues/17282)
- \[ENHANCEMENT] Scrape: Allow simultaneous use of classic histogram →
NHCB conversion and zero-timestamp ingestion.
[#​17305](https://redirect.github.com/prometheus/prometheus/issues/17305)
- \[ENHANCEMENT] UI: Add smoothed/anchored in explain.
[#​17334](https://redirect.github.com/prometheus/prometheus/issues/17334)
- \[ENHANCEMENT] OTLP: De-duplicate any `target_info` samples with the
same timestamp for the same series.
[#​17400](https://redirect.github.com/prometheus/prometheus/issues/17400)
- \[ENHANCEMENT] Document `use_fips_sts_endpoint` in `sigv4` config
sections.
[#​17304](https://redirect.github.com/prometheus/prometheus/issues/17304)
- \[ENHANCEMENT] Document Prometheus Agent.
[#​14519](https://redirect.github.com/prometheus/prometheus/issues/14519)
- \[PERF] PromQL: Speed up parsing of variadic functions.
[#​17316](https://redirect.github.com/prometheus/prometheus/issues/17316)
- \[PERF] UI: Speed up alerts/rules/... pages by not rendering collapsed
content.
[#​17485](https://redirect.github.com/prometheus/prometheus/issues/17485)
- \[PERF] UI: Performance improvement when getting label name and values
in promql editor.
[#​17194](https://redirect.github.com/prometheus/prometheus/issues/17194)
- \[PERF] UI: Speed up /alerts for many firing alerts via virtual
scrolling.
[#​17254](https://redirect.github.com/prometheus/prometheus/issues/17254)
- \[BUGFIX] PromQL: Fix slice indexing bug in info function on churning
series.
[#​17199](https://redirect.github.com/prometheus/prometheus/issues/17199)
- \[BUGFIX] API: Reduce lock contention on `/api/v1/targets`.
[#​17306](https://redirect.github.com/prometheus/prometheus/issues/17306)
- \[BUGFIX] PromQL: Consistent handling of gauge vs. counter histograms
in aggregations.
[#​17312](https://redirect.github.com/prometheus/prometheus/issues/17312)
- \[BUGFIX] TSDB: Allow NHCB with -Inf as the first custom value.
[#​17320](https://redirect.github.com/prometheus/prometheus/issues/17320)
- \[BUGFIX] UI: Fix duplicate loading of data from the API speed up
rendering of some pages.
[#​17357](https://redirect.github.com/prometheus/prometheus/issues/17357)
- \[BUGFIX] Old UI: Fix createExpressionLink to correctly build /graph
URLs so links from Alerts/Rules work again.
[#​17365](https://redirect.github.com/prometheus/prometheus/issues/17365)
- \[BUGFIX] PromQL: Avoid panic when parsing malformed `info` call.
[#​17379](https://redirect.github.com/prometheus/prometheus/issues/17379)
- \[BUGFIX] PromQL: Include histograms when enforcing sample\_limit.
[#​17390](https://redirect.github.com/prometheus/prometheus/issues/17390)
- \[BUGFIX] Config: Fix panic if TLS CA file is absent.
[#​17418](https://redirect.github.com/prometheus/prometheus/issues/17418)
- \[BUGFIX] PromQL: Fix `histogram_fraction` for classic histograms and
NHCB if lower bound is in the first bucket.
[#​17424](https://redirect.github.com/prometheus/prometheus/issues/17424)
</details>
---
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