scrape: support scraping targets via Unix Domain Sockets by IngmarStein · Pull Request #18091 · prometheus/prometheus

IngmarStein · 2026-02-15T13:00:12Z

This PR implements support for scraping targets listening on Unix Domain Sockets.

Update config.CheckTargetAddress to permit addresses starting with 'unix:'.
Update scrape.Target.URL() to generate 'unix' scheme URLs, utilizing query parameters to pass the socket path.
Implement a custom RoundTripper and Dialer interception logic to manage Unix socket connections while preserving standard HTTP/HTTPS semantics.
Update documentation in docs/configuration/configuration.md.

Which issue(s) does the PR fix:

Fixes Fixes #12024

Does this PR introduce a user-facing change?

[FEATURE] Scraping: Add support for scraping targets via Unix Domain Sockets. #12024

weriomat

This seems like a proper way to implement this feature. I have tested this feature and the scraping works successfully. A minor nitpick is the link used in the targets dashboard for the endpoint. It links to the UNIX socket and clicking the link does not make sense. IMO is this behavior fine.

IngmarStein · 2026-04-02T13:23:33Z

@saswatamcode Just a quick note that @weriomat tested the PR successfully, in case you haven't seen it yet. No rush at all, but I’m happy to make any changes whenever you have a moment to take a look!

DragonWork · 2026-04-17T17:29:15Z

+1

braydonk

I would really like to see this PR merged! The solution looks good to me. I've added some small non-blocking comments.

(Disclaimer: I'm not a member of the Prometheus team, just an external contributor trying to provide reviews to help this PR along)

IngmarStein · 2026-04-28T06:43:21Z

Thanks everyone for chiming in and providing support for this feature. There are over 200 open PRs at the moment, so I‘m patiently waiting for a member of the core team to review it.

IngmarStein · 2026-05-30T07:51:19Z

@bwplotka I think you recently merged a number of PRs touching the scrape component. Would you want to take a look at this? Thanks!

bwplotka

Thanks for the high quality change. Added some comments, but otherwise looks solid. I'm curious about the tradeoffs between different set of labels for the unix socket purpose e.g. scheme and address or scheme and param_socket? 🤔

IngmarStein · 2026-06-08T14:56:00Z

@bwplotka
Thanks for the thoughtful review! You raised exactly the right design questions. I did consider the __scheme__ approach, but landed on unix: prefix for a few reasons:

The core constraint is Go's url.URL type, not Prometheus's validation. Go can't carry a Unix socket path through the URL authority — url.URL{Host: "/var/run/sock"} percent-encodes to %2Fvar%2Frun%2Fsock in .String(), and url.Parse("http+unix:///var/run/sock/metrics") puts the socket path in Path, not Host. So any approach still needs a workaround at the transport layer to smuggle the socket path through the HTTP stack. The question is just where the user-facing boundary sits.

Given that, the unix: prefix approach wins on a few dimensions:

Single-label UX. Users set __address__ = "unix:///var/run/sock" and it works. With a __scheme__ approach they'd need to set two labels (__scheme__ + __address__), which means more relabeling rules when overriding SD targets.
No impact on service discovery. None of the 20+ SD mechanisms need updating. The unix: prefix is just a convention within __address__, analogous to the existing host:port or [ipv6]:port conventions already encoded there.
__scheme__ is barely used today — only the Kuma SD sets it explicitly. Making it part of the UDS contract would expand the feature's footprint across the label model.
Backward-compatible by construction — unix: can never collide with a valid hostname or IP, the same way _unix-<hex> can't collide with a DNS name (underscores are invalid in hostnames).
The query param trick is an internal detail — __unix_socket__ and __unix_scheme__ are set in target.URL() and deleted by unixRoundTripper.RoundTrip() before the request leaves Prometheus. They never reach the wire or the user. With __scheme__ you'd still need the equivalent mechanism, because Go's URL type doesn't become socket-aware just because the scheme changes.

Happy to revisit if there's a cleaner way to handle the url.URL impedance mismatch, but I think the current approach is the smallest possible change that actually works end-to-end.

IngmarStein · 2026-06-19T11:14:01Z

@bwplotka would you agree with #18091 (comment) or do you suggest some changes?

roidelapluie · 2026-06-25T10:47:30Z

I would strongly avoid having unix: in the address and would prefer to re-use scheme with unix+http.

roidelapluie · 2026-06-25T10:48:53Z

Also, should this - or part of this - live in the "common" HTTP client?

bwplotka · 2026-06-25T15:24:07Z

Added this to devsummit: https://docs.google.com/document/d/1uurQCi5iVufhYHGlBZ8mJMK_freDFKPG0iYBQqJ9fvA/edit?tab=t.0#heading=h.ajz664c62det

So @roidelapluie what do you propose?

schema=unix+http
unix_socket=/var/run/sock

or

schema=unix+http
address=/var/run/sock

?

roidelapluie · 2026-06-25T16:05:37Z

We need __unix_socket__ because that is the transport layer. It does not contain the HTTP URL/Path.

IngmarStein · 2026-06-26T17:29:00Z

Do I read the doc correctly that the decision is this?

schema=unix+http
address=/var/run/sock

roidelapluie · 2026-07-01T11:05:36Z

__schema__=unix+http
__unix_socket__=/var/run/sock
__address__=http://foo/metrics

IngmarStein · 2026-07-01T19:06:32Z

@roidelapluie updated the PR, please take a look.

IngmarStein · 2026-07-13T05:53:05Z

@bwplotka does this look like what you had envisioned?

IngmarStein · 2026-07-22T17:05:30Z

Friendly ping, @bwplotka

bwplotka

Code looks ok, just I still dont know why we cant reuse address label.

#18091 (comment)

@roidelapluie you mentioned path and address but metric path has path and address is not needed. The only rationale is perhaps brevity, perhaps focused validation, but scheme "unix+" is quite clear.

Anyway happy to merge if @roidelapluie is happy with this

bwplotka · 2026-07-23T10:16:27Z

Related slack discussion: https://cloud-native.slack.com/archives/C01AUBA4PFE/p1784800975090579

IngmarStein · 2026-08-01T06:28:13Z

Related slack discussion: https://cloud-native.slack.com/archives/C01AUBA4PFE/p1784800975090579

Is this a private space? I see that signup requires a linuxfoundation.org email address. If so, can you summarize the outcome here?

bboreham · 2026-08-04T11:46:47Z

Should be public if you get an account first, via https://slack.cncf.io

The thread is discussing the same point from above comments, "metric path has path and address is not needed", and to my eyes did not reach a conclusion.

bwplotka

As discussed in https://cloud-native.slack.com/archives/C01AUBA4PFE/p1784800975090579 we might go for the __unix_socket__ label.

However I reviewed closely, and:

I wonder if we need this RT or host changing. For TLS it seems we need to preserve __address__
For scheme we could actually simplify and ask for http or https. We can infer unix from __unix_socket__
We need e2e test, added pointers in the comment.

Sorry for lags and great job on this!

IngmarStein · 2026-08-04T20:00:55Z

@bwplotka thanks for the feedback! I've applied it and agree the result looks quite a bit simpler.

bwplotka

Some nits, but otherwise good, thanks!

Add support for scraping targets via Unix Domain Sockets (UDS). When the label __unix_socket__ is set on a target, the scrape client will connect through the specified Unix domain socket instead of via the target __address__. The custom dial function is injected via config_util.WithDialContextFunc, which ensures it is installed during transport construction before any auth or TLS file-watching wrappers are applied. This avoids silently falling back to TCP when file-based TLS, auth, or custom headers are configured. The dial function is prepended to the option list so that callers can override it with their own WithDialContextFunc options. Signed-off-by: Ingmar Stein <[email protected]>

bwplotka

Thanks!

bwplotka · 2026-08-06T15:18:52Z

 		}
 	})

+	host := t.labels.Get(model.AddressLabel)


nit: We could inline now

##### [\`v3.15.0\`](https://github.com/prometheus/prometheus/releases/tag/v3.15.0) - \[CHANGE] PromQL: A range query whose `end` was not aligned to `step` caused subqueries inside it to evaluate past the parent's last actual step, inflating `peakSamples` in the query stats and against the `query.max-samples` limit, and wasting storage I/O reading samples that were never used in the result. Add tests to prevent regression of the fix made in [#18081](prometheus/prometheus#18081). [#18598](prometheus/prometheus#18598) - \[CHANGE] PromQL: Do not register a start timestamp reset if the start timestamp hasn't changed between subsequent samples. [#19454](prometheus/prometheus#19454) - \[CHANGE] Logging: Deprecate `--log.level`; use `runtime.log_level` configuration to supply the default level. [#19511](prometheus/prometheus#19511) - \[FEATURE] Configuration: Allow changing the process log level through `runtime.log_level` on configuration reload. [#19511](prometheus/prometheus#19511) - \[FEATURE] Prometheus: Add `--auto-gomemlimit.refresh-interval` flag to periodically re-detect the container or system memory limit and update `GOMEMLIMIT` at runtime. [#18843](prometheus/prometheus#18843) - \[FEATURE] Scraping: Add support for scraping targets via Unix Domain Sockets. [#12024](prometheus/prometheus#12024). [#18091](prometheus/prometheus#18091) - \[FEATURE] scrape: Implement OM2.0 scrape format. [#18606](prometheus/prometheus#18606) - \[ENHANCEMENT] Reduce TSDB head CPU utilization when initializing. [#18001](prometheus/prometheus#18001) - \[ENHANCEMENT] Docker SD: Add labels `__meta_docker_container_image` and `__meta_docker_container_image_id`. [#19386](prometheus/prometheus#19386) - \[ENHANCEMENT] Mixin: Add a p95/p99 remote-write send-batch latency panel to the remote-write dashboard. [#19500](prometheus/prometheus#19500) - \[ENHANCEMENT] Mixin: Support native histograms in the remote-write send-batch latency panel. [#19522](prometheus/prometheus#19522) - \[ENHANCEMENT] PromQL/TSDB: The `--enable-feature=st-storage` flag now automatically enables XOR2 float chunk encoding and ST-capable histogram chunk encoding, so you no longer need to pass `xor2-encoding` and `histograms-st-encoding` alongside it. [#19518](prometheus/prometheus#19518) - \[ENHANCEMENT] Remote write / Alertmanager: upgrade sigv4 to v0.5.0, adding `session_name` and `tags` fields for STS AssumeRole sessions. The previously undocumented `service_name` field is now also documented. [#19569](prometheus/prometheus#19569) - \[ENHANCEMENT] Scraping: Support zstd-compressed scrape responses, enabled via feature flag `zstd-scrape`. [#19502](prometheus/prometheus#19502) - \[ENHANCEMENT] TSDB: Stabilize the XOR2 float chunk encoding. `--enable-feature=xor2-encoding` is deprecated; use `storage.tsdb.chunk_encoding.floats: xor2` instead. Check that other software reading the TSDB directly (e.g. Thanos sidecar) supports XOR2 before enabling. [#19461](prometheus/prometheus#19461) - \[ENHANCEMENT] TSDB: add `prometheus_tsdb_head_appenders_created_total` metric. [#19411](prometheus/prometheus#19411) - \[ENHANCEMENT] Tracing: add more spans to scrapes, API queries and rule evaluations. [#19410](prometheus/prometheus#19410) - \[ENHANCEMENT] UI: Show the effective configuration for each scrape pool on the Targets and Service Discovery pages. [#19384](prometheus/prometheus#19384) - \[ENHANCEMENT] scrape: Enable start time synthesis for summary `_count` and `_sum` series in scrape appender v2. [#19323](prometheus/prometheus#19323) - \[ENHANCEMENT] scrape: stop all pools in parallel for faster shutdowns. [#19295](prometheus/prometheus#19295) - \[ENHANCEMENT] storage/remote: Add undocumented failed\_request\_logging config field to debug log remote write V2 requests on send errors. [#19249](prometheus/prometheus#19249) - \[ENHANCEMENT] TSDB: Add fast path for XOR chunk decompression to speed up queries. [#18049](prometheus/prometheus#18049) - \[ENHANCEMENT] UI: Improve native histogram table formatting and add a background bar indicating the bucket count. [#19332](prometheus/prometheus#19332) - \[ENHANCEMENT] TSDB: Add `prometheus_tsdb_head_series_pending_commit_underflow_total` to report pending-sample reservation underflows. [#19470](prometheus/prometheus#19470) - \[PERF] AWS SD: Build RDS cluster labels once per cluster instead of once per instance. [#19504](prometheus/prometheus#19504) - \[PERF] AWS SD: Describe RDS instances of different clusters concurrently, bounded by `request_concurrency`. [#19506](prometheus/prometheus#19506) - \[PERF] AWS SD: Describe each ElastiCache resource once per refresh instead of twice. [#19585](prometheus/prometheus#19585) - \[PERF] Remote read: Avoid cloning labels for sampled reads when no external labels are configured. [#19503](prometheus/prometheus#19503) - \[PERF] Remote write: Reuse OTLP converter scratch state between requests. [#19388](prometheus/prometheus#19388) - \[PERF] scrape: conversion from classic to native histograms should only parse start times when enabled. [#19446](prometheus/prometheus#19446) - \[BUGFIX] PromQL: Fix `info()` enrichment for composite expressions with mixed `@`/offset references or selector-free vector branches, preventing metadata from being evaluated at an unrelated timestamp. [#19387](prometheus/prometheus#19387) - \[BUGFIX] PromQL: Fix info() enrichment when input series use different subsets of identifying labels. [#19557](prometheus/prometheus#19557) - \[BUGFIX] PromQL: Preserve metric-name dropping through the info function when delayed name removal is enabled. [#19413](prometheus/prometheus#19413) - \[BUGFIX] TSDB: Don't silently drop samples when head garbage collection removes a series while it is being appended to. [#19272](prometheus/prometheus#19272) - \[BUGFIX] TSDB: Keep series with uncommitted samples during selected- and stale-series compaction, including when appenders overlap. [#19470](prometheus/prometheus#19470) - \[BUGFIX] TSDB: Do not retain head series after a synthetic start-timestamp zero sample is rejected. [#19470](prometheus/prometheus#19470) - \[BUGFIX] TSDB: Prevent query panics during series eviction after WAL replay. [#19664](prometheus/prometheus#19664) - \[BUGFIX] TSDB: fix potential deadlock between mmapSeriesChunks and gcSeries. [#19460](prometheus/prometheus#19460) - \[BUGFIX] TSDB: fix default block reload interval for custom options. [#19368](prometheus/prometheus#19368) - \[BUGFIX] AWS SD: Do not crash on serverless MSK clusters or MSK clusters without Open Monitoring. [#19194](prometheus/prometheus#19194) - \[BUGFIX] AWS SD: Do not panic when the ElastiCache API omits optional fields of a serverless cache or cache cluster. [#19435](prometheus/prometheus#19435) - \[BUGFIX] AWS SD: Reject non-positive `request_concurrency` instead of hanging service discovery indefinitely. [#19524](prometheus/prometheus#19524) - \[BUGFIX] Discovery/AWS: Avoid a panic when discovering standalone ECS tasks with custom task groups. [#19302](prometheus/prometheus#19302) - \[BUGFIX] Discovery: Do not panic in AWS Lightsail service discovery when an instance is missing optional fields such as availability zone, blueprint, bundle, name, state or support code. [#19324](prometheus/prometheus#19324) - \[BUGFIX] Discovery: delete the stale `prometheus_sd_last_update_timestamp_seconds` series for a config that is removed on reload. [#19131](prometheus/prometheus#19131) - \[BUGFIX] HTTP: Avoid truncating compressed responses when handlers set Content-Length. [#19661](prometheus/prometheus#19661) - \[BUGFIX] IONOS SD: Do not panic when the API response omits the server, NIC or volume collections, or a server's properties. [#19438](prometheus/prometheus#19438) - \[BUGFIX] Metadata will not affect the number of Remote Write v2 shards. [#19218](prometheus/prometheus#19218) - \[BUGFIX] Mixins: Fix label mismatches that prevented PrometheusHAGroupNotIngestingSamples and PrometheusHAGroupCrashlooping from firing. [#19444](prometheus/prometheus#19444) - \[BUGFIX] Native histograms: `DetectReset` no longer misses a counter reset when a populated bucket behind an empty one disappears, which could make histogram `rate()`/`increase()` undercount. [#19367](prometheus/prometheus#19367) - \[BUGFIX] Never skip histogram buckets for histogram\_stddev and histogram\_stdvar functions. [#19521](prometheus/prometheus#19521) - \[BUGFIX] OTLP: Do not abort an entire OTLP payload ingestion if one metric has no datapoints. [#19343](prometheus/prometheus#19343) - \[BUGFIX] PromQL: Fix FastRegexMatcher false-positive match when a capturing group is directly adjacent to a literal (e.g. `.*\|(foo)\|.*`). [#19516](prometheus/prometheus#19516) - \[BUGFIX] PromQL: Fix a panic in range selectors using the experimental `anchored` or `smoothed` modifier when the selected series has no samples inside the query window, for example a query evaluated inside a scrape gap. [#19431](prometheus/prometheus#19431) - \[BUGFIX] PromQL: Fix empty results when a subquery with `@` is used as the matrix argument of a call that is not step-invariant (for example `quantile_over_time(scalar(x), metric[...:...] @ T)`). [#19187](prometheus/prometheus#19187) - \[BUGFIX] PromQL: Make the "found duplicate series for the match group" many-to-many matching error message deterministic by sorting the two duplicate labels. [#18810](prometheus/prometheus#18810) - \[BUGFIX] PromQL: Preserve parentheses around duration literals on Expr.String() round-trip. [#19403](prometheus/prometheus#19403) - \[BUGFIX] PromQL: Reject duration-expression offsets and `@ start()` / `@ end()` before range selectors, matching the existing rejection of literal offsets and `@ <timestamp>`. [#19406](prometheus/prometheus#19406) - \[BUGFIX] PromQL: Report the position of the histogram argument rather than of a scalar argument in the native histogram NaN observation annotations of `histogram_quantile` and `histogram_fraction`. [#19330](prometheus/prometheus#19330) - \[BUGFIX] PromQL: info() now applies the @ modifier/offset when evaluating the info series, so info(v @ T) enriches as of T consistently instead of depending on the query start/eval time. [#19266](prometheus/prometheus#19266) - \[BUGFIX] Rules: Fix a panic when a rule manager created without a logger loads a rule file containing multiple YAML documents. [#19433](prometheus/prometheus#19433) - \[BUGFIX] Scrape: Do not append a stale marker for a series that is still exposed when the storage returns a new series reference for it. [#19328](prometheus/prometheus#19328) - \[BUGFIX] Scrape: JSON log formatter correctly format scrape target info. [#19472](prometheus/prometheus#19472) - \[BUGFIX] TSDB: Fix in-order chunk ID overflow by wrapping head chunk IDs modulo 2^23 so they never collide with the out-of-order flag bit. [#19450](prometheus/prometheus#19450) - \[BUGFIX] TSDB: Fix out-of-order chunk ID overflow by wrapping `firstOOOChunkID` modulo 2^23 instead of growing unbounded. [#19216](prometheus/prometheus#19216) - \[BUGFIX] UI: Remove an extraneous X-axis tick mark in the native histogram chart when using the "linear" display mode. [#19326](prometheus/prometheus#19326) - \[BUGFIX] discovery/aws: Avoid a panic when an ElastiCache ARN is missing its resource ID. [#19333](prometheus/prometheus#19333) - \[BUGFIX] discovery/aws: Do not panic on MSK clusters whose optional API fields are absent. [#19584](prometheus/prometheus#19584) - \[BUGFIX] discovery/aws: Do not panic when the EC2 API omits optional instance fields. [#19512](prometheus/prometheus#19512) - \[BUGFIX] discovery/aws: Don't panic on ECS tasks with absent optional fields. [#19396](prometheus/prometheus#19396) - \[BUGFIX] discovery/aws: MSK Optional Custom Configuration Fields [#19422](prometheus/prometheus#19422). [#19422](prometheus/prometheus#19422) - \[BUGFIX] discovery/ionos: Fix panic when the IONOS API omits optional server fields. [#19418](prometheus/prometheus#19418) - \[BUGFIX] discovery/kubernetes: Populate `__meta_kubernetes_service_loadbalancer_ip` from `status.loadBalancer.ingress`, falling back to deprecated `spec.loadBalancerIP`. [#19404](prometheus/prometheus#19404) - \[BUGFIX] histogram: Fix Compact moving buckets to wrong indices, and producing negative bucket counts for integer histograms, when more than one span is merged in the same pass. [#19312](prometheus/prometheus#19312) - \[BUGFIX] promtool: Fixed `tsdb dump` silently dropping native histogram samples. [#18051](prometheus/prometheus#18051) - \[BUGFIX] scrape: fix data race in `Manager.TargetsDroppedCounts` to avoid miscounting dropped targets. [#19304](prometheus/prometheus#19304) - \[BUGFIX] scrape: fix nil histogram when native and classic histograms are mixed in one metric family. [#19452](prometheus/prometheus#19452) - \[BUGFIX] TSDB: Fix WAL and GC log messages to emit human-readable duration strings instead of nanosecond integers. [#19307](prometheus/prometheus#19307) - \[BUGFIX] TSDB: Avoid WAL corruption after a failed WAL write in Agent mode. [#19700](prometheus/prometheus#19700) - \[BUGFIX] Agent: Ignore unknown WAL record types, to help users rolling back. [#19814](prometheus/prometheus#19814)

…→ v3.15.0) (#769) This PR contains the following updates: | Package | Update | Change | |---|---|---| | [quay.io/prometheus/prometheus](https://github.com/prometheus/prometheus) | minor | `v3.14.0` → `v3.15.0` | --- ### Release Notes <details> <summary>prometheus/prometheus (quay.io/prometheus/prometheus)</summary> ### [`v3.15.0`](https://github.com/prometheus/prometheus/releases/tag/v3.15.0): 3.15.0 / 2026-09-24 [Compare Source](prometheus/prometheus@v3.14.0...v3.15.0) - \[CHANGE] PromQL: A range query whose `end` was not aligned to `step` caused subqueries inside it to evaluate past the parent's last actual step, inflating `peakSamples` in the query stats and against the `query.max-samples` limit, and wasting storage I/O reading samples that were never used in the result. Add tests to prevent regression of the fix made in [#18081](prometheus/prometheus#18081). [#18598](prometheus/prometheus#18598) - \[CHANGE] PromQL: Do not register a start timestamp reset if the start timestamp hasn't changed between subsequent samples. [#19454](prometheus/prometheus#19454) - \[CHANGE] Logging: Deprecate `--log.level`; use `runtime.log_level` configuration to supply the default level. [#19511](prometheus/prometheus#19511) - \[FEATURE] Configuration: Allow changing the process log level through `runtime.log_level` on configuration reload. [#19511](prometheus/prometheus#19511) - \[FEATURE] Prometheus: Add `--auto-gomemlimit.refresh-interval` flag to periodically re-detect the container or system memory limit and update `GOMEMLIMIT` at runtime. [#18843](prometheus/prometheus#18843) - \[FEATURE] Scraping: Add support for scraping targets via Unix Domain Sockets. [#12024](prometheus/prometheus#12024). [#18091](prometheus/prometheus#18091) - \[FEATURE] scrape: Implement OM2.0 scrape format. [#18606](prometheus/prometheus#18606) - \[ENHANCEMENT] Reduce TSDB head CPU utilization when initializing. [#18001](prometheus/prometheus#18001) - \[ENHANCEMENT] Docker SD: Add labels `__meta_docker_container_image` and `__meta_docker_container_image_id`. [#19386](prometheus/prometheus#19386) - \[ENHANCEMENT] Mixin: Add a p95/p99 remote-write send-batch latency panel to the remote-write dashboard. [#19500](prometheus/prometheus#19500) - \[ENHANCEMENT] Mixin: Support native histograms in the remote-write send-batch latency panel. [#19522](prometheus/prometheus#19522) - \[ENHANCEMENT] PromQL/TSDB: The `--enable-feature=st-storage` flag now automatically enables XOR2 float chunk encoding and ST-capable histogram chunk encoding, so you no longer need to pass `xor2-encoding` and `histograms-st-encoding` alongside it. [#19518](prometheus/prometheus#19518) - \[ENHANCEMENT] Remote write / Alertmanager: upgrade sigv4 to v0.5.0, adding `session_name` and `tags` fields for STS AssumeRole sessions. The previously undocumented `service_name` field is now also documented. [#19569](prometheus/prometheus#19569) - \[ENHANCEMENT] Scraping: Support zstd-compressed scrape responses, enabled via feature flag `zstd-scrape`. [#19502](prometheus/prometheus#19502) - \[ENHANCEMENT] TSDB: Stabilize the XOR2 float chunk encoding. `--enable-feature=xor2-encoding` is deprecated; use `storage.tsdb.chunk_encoding.floats: xor2` instead. Check that other software reading the TSDB directly (e.g. Thanos sidecar) supports XOR2 before enabling. [#19461](prometheus/prometheus#19461) - \[ENHANCEMENT] TSDB: add `prometheus_tsdb_head_appenders_created_total` metric. [#19411](prometheus/prometheus#19411) - \[ENHANCEMENT] Tracing: add more spans to scrapes, API queries and rule evaluations. [#19410](prometheus/prometheus#19410) - \[ENHANCEMENT] UI: Show the effective configuration for each scrape pool on the Targets and Service Discovery pages. [#19384](prometheus/prometheus#19384) - \[ENHANCEMENT] scrape: Enable start time synthesis for summary `_count` and `_sum` series in scrape appender v2. [#19323](prometheus/prometheus#19323) - \[ENHANCEMENT] scrape: stop all pools in parallel for faster shutdowns. [#19295](prometheus/prometheus#19295) - \[ENHANCEMENT] storage/remote: Add undocumented failed\_request\_logging config field to debug log remote write V2 requests on send errors. [#19249](prometheus/prometheus#19249) - \[ENHANCEMENT] TSDB: Add fast path for XOR chunk decompression to speed up queries. [#18049](prometheus/prometheus#18049) - \[ENHANCEMENT] UI: Improve native histogram table formatting and add a background bar indicating the bucket count. [#19332](prometheus/prometheus#19332) - \[ENHANCEMENT] TSDB: Add `prometheus_tsdb_head_series_pending_commit_underflow_total` to report pending-sample reservation underflows. [#19470](prometheus/prometheus#19470) - \[PERF] AWS SD: Build RDS cluster labels once per cluster instead of once per instance. [#19504](prometheus/prometheus#19504) - \[PERF] AWS SD: Describe RDS instances of different clusters concurrently, bounded by `request_concurrency`. [#19506](prometheus/prometheus#19506) - \[PERF] AWS SD: Describe each ElastiCache resource once per refresh instead of twice. [#19585](prometheus/prometheus#19585) - \[PERF] Remote read: Avoid cloning labels for sampled reads when no external labels are configured. [#19503](prometheus/prometheus#19503) - \[PERF] Remote write: Reuse OTLP converter scratch state between requests. [#19388](prometheus/prometheus#19388) - \[PERF] scrape: conversion from classic to native histograms should only parse start times when enabled. [#19446](prometheus/prometheus#19446) - \[BUGFIX] PromQL: Fix `info()` enrichment for composite expressions with mixed `@`/offset references or selector-free vector branches, preventing metadata from being evaluated at an unrelated timestamp. [#19387](prometheus/prometheus#19387) - \[BUGFIX] PromQL: Fix info() enrichment when input series use different subsets of identifying labels. [#19557](prometheus/prometheus#19557) - \[BUGFIX] PromQL: Preserve metric-name dropping through the info function when delayed name removal is enabled. [#19413](prometheus/prometheus#19413) - \[BUGFIX] TSDB: Don't silently drop samples when head garbage collection removes a series while it is being appended to. [#19272](prometheus/prometheus#19272) - \[BUGFIX] TSDB: Keep series with uncommitted samples during selected- and stale-series compaction, including when appenders overlap. [#19470](prometheus/prometheus#19470) - \[BUGFIX] TSDB: Do not retain head series after a synthetic start-timestamp zero sample is rejected. [#19470](prometheus/prometheus#19470) - \[BUGFIX] TSDB: Prevent query panics during series eviction after WAL replay. [#19664](prometheus/prometheus#19664) - \[BUGFIX] TSDB: fix potential deadlock between mmapSeriesChunks and gcSeries. [#19460](prometheus/prometheus#19460) - \[BUGFIX] TSDB: fix default block reload interval for custom options. [#19368](prometheus/prometheus#19368) - \[BUGFIX] AWS SD: Do not crash on serverless MSK clusters or MSK clusters without Open Monitoring. [#19194](prometheus/prometheus#19194) - \[BUGFIX] AWS SD: Do not panic when the ElastiCache API omits optional fields of a serverless cache or cache cluster. [#19435](prometheus/prometheus#19435) - \[BUGFIX] AWS SD: Reject non-positive `request_concurrency` instead of hanging service discovery indefinitely. [#19524](prometheus/prometheus#19524) - \[BUGFIX] Discovery/AWS: Avoid a panic when discovering standalone ECS tasks with custom task groups. [#19302](prometheus/prometheus#19302) - \[BUGFIX] Discovery: Do not panic in AWS Lightsail service discovery when an instance is missing optional fields such as availability zone, blueprint, bundle, name, state or support code. [#19324](prometheus/prometheus#19324) - \[BUGFIX] Discovery: delete the stale `prometheus_sd_last_update_timestamp_seconds` series for a config that is removed on reload. [#19131](prometheus/prometheus#19131) - \[BUGFIX] HTTP: Avoid truncating compressed responses when handlers set Content-Length. [#19661](prometheus/prometheus#19661) - \[BUGFIX] IONOS SD: Do not panic when the API response omits the server, NIC or volume collections, or a server's properties. [#19438](prometheus/prometheus#19438) - \[BUGFIX] Metadata will not affect the number of Remote Write v2 shards. [#19218](prometheus/prometheus#19218) - \[BUGFIX] Mixins: Fix label mismatches that prevented PrometheusHAGroupNotIngestingSamples and PrometheusHAGroupCrashlooping from firing. [#19444](prometheus/prometheus#19444) - \[BUGFIX] Native histograms: `DetectReset` no longer misses a counter reset when a populated bucket behind an empty one disappears, which could make histogram `rate()`/`increase()` undercount. [#19367](prometheus/prometheus#19367) - \[BUGFIX] Never skip histogram buckets for histogram\_stddev and histogram\_stdvar functions. [#19521](prometheus/prometheus#19521) - \[BUGFIX] OTLP: Do not abort an entire OTLP payload ingestion if one metric has no datapoints. [#19343](prometheus/prometheus#19343) - \[BUGFIX] PromQL: Fix FastRegexMatcher false-positive match when a capturing group is directly adjacent to a literal (e.g. `.*\|(foo)\|.*`). [#19516](prometheus/prometheus#19516) - \[BUGFIX] PromQL: Fix a panic in range selectors using the experimental `anchored` or `smoothed` modifier when the selected series has no samples inside the query window, for example a query evaluated inside a scrape gap. [#19431](prometheus/prometheus#19431) - \[BUGFIX] PromQL: Fix empty results when a subquery with `@` is used as the matrix argument of a call that is not step-invariant (for example `quantile_over_time(scalar(x), metric[...:...] @ T)`). [#19187](prometheus/prometheus#19187) - \[BUGFIX] PromQL: Make the "found duplicate series for the match group" many-to-many matching error message deterministic by sorting the two duplicate labels. [#18810](prometheus/prometheus#18810) - \[BUGFIX] PromQL: Preserve parentheses around duration literals on Expr.String() round-trip. [#19403](prometheus/prometheus#19403) - \[BUGFIX] PromQL: Reject duration-expression offsets and `@ start()` / `@ end()` before range selectors, matching the existing rejection of literal offsets and `@ <timestamp>`. [#19406](prometheus/prometheus#19406) - \[BUGFIX] PromQL: Report the position of the histogram argument rather than of a scalar argument in the native histogram NaN observation annotations of `histogram_quantile` and `histogram_fraction`. [#19330](prometheus/prometheus#19330) - \[BUGFIX] PromQL: info() now applies the @ modifier/offset when evaluating the info series, so info(v @ T) enriches as of T consistently instead of depending on the query start/eval time. [#19266](prometheus/prometheus#19266) - \[BUGFIX] Rules: Fix a panic when a rule manager created without a logger loads a rule file containing multiple YAML documents. [#19433](prometheus/prometheus#19433) - \[BUGFIX] Scrape: Do not append a stale marker for a series that is still exposed when the storage returns a new series reference for it. [#19328](prometheus/prometheus#19328) - \[BUGFIX] Scrape: JSON log formatter correctly format scrape target info. [#19472](prometheus/prometheus#19472) - \[BUGFIX] TSDB: Fix in-order chunk ID overflow by wrapping head chunk IDs modulo 2^23 so they never collide with the out-of-order flag bit. [#19450](prometheus/prometheus#19450) - \[BUGFIX] TSDB: Fix out-of-order chunk ID overflow by wrapping `firstOOOChunkID` modulo 2^23 instead of growing unbounded. [#19216](prometheus/prometheus#19216) - \[BUGFIX] UI: Remove an extraneous X-axis tick mark in the native histogram chart when using the "linear" display mode. [#19326](prometheus/prometheus#19326) - \[BUGFIX] discovery/aws: Avoid a panic when an ElastiCache ARN is missing its resource ID. [#19333](prometheus/prometheus#19333) - \[BUGFIX] discovery/aws: Do not panic on MSK clusters whose optional API fields are absent. [#19584](prometheus/prometheus#19584) - \[BUGFIX] discovery/aws: Do not panic when the EC2 API omits optional instance fields. [#19512](prometheus/prometheus#19512) - \[BUGFIX] discovery/aws: Don't panic on ECS tasks with absent optional fields. [#19396](prometheus/prometheus#19396) - \[BUGFIX] discovery/aws: MSK Optional Custom Configuration Fields [#19422](prometheus/prometheus#19422). [#19422](prometheus/prometheus#19422) - \[BUGFIX] discovery/ionos: Fix panic when the IONOS API omits optional server fields. [#19418](prometheus/prometheus#19418) - \[BUGFIX] discovery/kubernetes: Populate `__meta_kubernetes_service_loadbalancer_ip` from `status.loadBalancer.ingress`, falling back to deprecated `spec.loadBalancerIP`. [#19404](prometheus/prometheus#19404) - \[BUGFIX] histogram: Fix Compact moving buckets to wrong indices, and producing negative bucket counts for integer histograms, when more than one span is merged in the same pass. [#19312](prometheus/prometheus#19312) - \[BUGFIX] promtool: Fixed `tsdb dump` silently dropping native histogram samples. [#18051](prometheus/prometheus#18051) - \[BUGFIX] scrape: fix data race in `Manager.TargetsDroppedCounts` to avoid miscounting dropped targets. [#19304](prometheus/prometheus#19304) - \[BUGFIX] scrape: fix nil histogram when native and classic histograms are mixed in one metric family. [#19452](prometheus/prometheus#19452) - \[BUGFIX] TSDB: Fix WAL and GC log messages to emit human-readable duration strings instead of nanosecond integers. [#19307](prometheus/prometheus#19307) - \[BUGFIX] TSDB: Avoid WAL corruption after a failed WAL write in Agent mode. [#19700](prometheus/prometheus#19700) - \[BUGFIX] Agent: Ignore unknown WAL record types, to help users rolling back. [#19814](prometheus/prometheus#19814) </details> --- ### Configuration 📅 **Schedule**: (in timezone Europe/London) - Branch creation - At any time (no schedule defined) - Automerge - At any time (no schedule defined) 🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied. ♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox. 🔕 **Ignore**: Close this PR and you won't be reminded about this update again. --- - [ ] If you want to rebase/retry this PR, check this box --- This PR has been generated by [Mend Renovate CLI](https://github.com/renovatebot/renovate).  Reviewed-on: https://git.hayden.moe/hayden/phoebe/pulls/769

…➔ v3.15.0) (#2199) This PR contains the following updates: | Package | Update | Change | |---|---|---| | [quay.io/prometheus/prometheus](https://github.com/prometheus/prometheus) | minor | `v3.14.0` → `v3.15.0` | --- > ⚠️ **Warning** > > Some dependencies could not be looked up. Check the [Dependency Dashboard](issues/567) for more information. --- ### Release Notes <details> <summary>prometheus/prometheus (quay.io/prometheus/prometheus)</summary> ### [`v3.15.0`](https://github.com/prometheus/prometheus/releases/tag/v3.15.0): 3.15.0 / 2026-09-24 [Compare Source](prometheus/prometheus@v3.14.0...v3.15.0) - \[CHANGE] PromQL: A range query whose `end` was not aligned to `step` caused subqueries inside it to evaluate past the parent's last actual step, inflating `peakSamples` in the query stats and against the `query.max-samples` limit, and wasting storage I/O reading samples that were never used in the result. Add tests to prevent regression of the fix made in [#18081](prometheus/prometheus#18081). [#18598](prometheus/prometheus#18598) - \[CHANGE] PromQL: Do not register a start timestamp reset if the start timestamp hasn't changed between subsequent samples. [#19454](prometheus/prometheus#19454) - \[CHANGE] Logging: Deprecate `--log.level`; use `runtime.log_level` configuration to supply the default level. [#19511](prometheus/prometheus#19511) - \[FEATURE] Configuration: Allow changing the process log level through `runtime.log_level` on configuration reload. [#19511](prometheus/prometheus#19511) - \[FEATURE] Prometheus: Add `--auto-gomemlimit.refresh-interval` flag to periodically re-detect the container or system memory limit and update `GOMEMLIMIT` at runtime. [#18843](prometheus/prometheus#18843) - \[FEATURE] Scraping: Add support for scraping targets via Unix Domain Sockets. [#12024](prometheus/prometheus#12024). [#18091](prometheus/prometheus#18091) - \[FEATURE] scrape: Implement OM2.0 scrape format. [#18606](prometheus/prometheus#18606) - \[ENHANCEMENT] Reduce TSDB head CPU utilization when initializing. [#18001](prometheus/prometheus#18001) - \[ENHANCEMENT] Docker SD: Add labels `__meta_docker_container_image` and `__meta_docker_container_image_id`. [#19386](prometheus/prometheus#19386) - \[ENHANCEMENT] Mixin: Add a p95/p99 remote-write send-batch latency panel to the remote-write dashboard. [#19500](prometheus/prometheus#19500) - \[ENHANCEMENT] Mixin: Support native histograms in the remote-write send-batch latency panel. [#19522](prometheus/prometheus#19522) - \[ENHANCEMENT] PromQL/TSDB: The `--enable-feature=st-storage` flag now automatically enables XOR2 float chunk encoding and ST-capable histogram chunk encoding, so you no longer need to pass `xor2-encoding` and `histograms-st-encoding` alongside it. [#19518](prometheus/prometheus#19518) - \[ENHANCEMENT] Remote write / Alertmanager: upgrade sigv4 to v0.5.0, adding `session_name` and `tags` fields for STS AssumeRole sessions. The previously undocumented `service_name` field is now also documented. [#19569](prometheus/prometheus#19569) - \[ENHANCEMENT] Scraping: Support zstd-compressed scrape responses, enabled via feature flag `zstd-scrape`. [#19502](prometheus/prometheus#19502) - \[ENHANCEMENT] TSDB: Stabilize the XOR2 float chunk encoding. `--enable-feature=xor2-encoding` is deprecated; use `storage.tsdb.chunk_encoding.floats: xor2` instead. Check that other software reading the TSDB directly (e.g. Thanos sidecar) supports XOR2 before enabling. [#19461](prometheus/prometheus#19461) - \[ENHANCEMENT] TSDB: add `prometheus_tsdb_head_appenders_created_total` metric. [#19411](prometheus/prometheus#19411) - \[ENHANCEMENT] Tracing: add more spans to scrapes, API queries and rule evaluations. [#19410](prometheus/prometheus#19410) - \[ENHANCEMENT] UI: Show the effective configuration for each scrape pool on the Targets and Service Discovery pages. [#19384](prometheus/prometheus#19384) - \[ENHANCEMENT] scrape: Enable start time synthesis for summary `_count` and `_sum` series in scrape appender v2. [#19323](prometheus/prometheus#19323) - \[ENHANCEMENT] scrape: stop all pools in parallel for faster shutdowns. [#19295](prometheus/prometheus#19295) - \[ENHANCEMENT] storage/remote: Add undocumented failed\_request\_logging config field to debug log remote write V2 requests on send errors. [#19249](prometheus/prometheus#19249) - \[ENHANCEMENT] TSDB: Add fast path for XOR chunk decompression to speed up queries. [#18049](prometheus/prometheus#18049) - \[ENHANCEMENT] UI: Improve native histogram table formatting and add a background bar indicating the bucket count. [#19332](prometheus/prometheus#19332) - \[ENHANCEMENT] TSDB: Add `prometheus_tsdb_head_series_pending_commit_underflow_total` to report pending-sample reservation underflows. [#19470](prometheus/prometheus#19470) - \[PERF] AWS SD: Build RDS cluster labels once per cluster instead of once per instance. [#19504](prometheus/prometheus#19504) - \[PERF] AWS SD: Describe RDS instances of different clusters concurrently, bounded by `request_concurrency`. [#19506](prometheus/prometheus#19506) - \[PERF] AWS SD: Describe each ElastiCache resource once per refresh instead of twice. [#19585](prometheus/prometheus#19585) - \[PERF] Remote read: Avoid cloning labels for sampled reads when no external labels are configured. [#19503](prometheus/prometheus#19503) - \[PERF] Remote write: Reuse OTLP converter scratch state between requests. [#19388](prometheus/prometheus#19388) - \[PERF] scrape: conversion from classic to native histograms should only parse start times when enabled. [#19446](prometheus/prometheus#19446) - \[BUGFIX] PromQL: Fix `info()` enrichment for composite expressions with mixed `@`/offset references or selector-free vector branches, preventing metadata from being evaluated at an unrelated timestamp. [#19387](prometheus/prometheus#19387) - \[BUGFIX] PromQL: Fix info() enrichment when input series use different subsets of identifying labels. [#19557](prometheus/prometheus#19557) - \[BUGFIX] PromQL: Preserve metric-name dropping through the info function when delayed name removal is enabled. [#19413](prometheus/prometheus#19413) - \[BUGFIX] TSDB: Don't silently drop samples when head garbage collection removes a series while it is being appended to. [#19272](prometheus/prometheus#19272) - \[BUGFIX] TSDB: Keep series with uncommitted samples during selected- and stale-series compaction, including when appenders overlap. [#19470](prometheus/prometheus#19470) - \[BUGFIX] TSDB: Do not retain head series after a synthetic start-timestamp zero sample is rejected. [#19470](prometheus/prometheus#19470) - \[BUGFIX] TSDB: Prevent query panics during series eviction after WAL replay. [#19664](prometheus/prometheus#19664) - \[BUGFIX] TSDB: fix potential deadlock between mmapSeriesChunks and gcSeries. [#19460](prometheus/prometheus#19460) - \[BUGFIX] TSDB: fix default block reload interval for custom options. [#19368](prometheus/prometheus#19368) - \[BUGFIX] AWS SD: Do not crash on serverless MSK clusters or MSK clusters without Open Monitoring. [#19194](prometheus/prometheus#19194) - \[BUGFIX] AWS SD: Do not panic when the ElastiCache API omits optional fields of a serverless cache or cache cluster. [#19435](prometheus/prometheus#19435) - \[BUGFIX] AWS SD: Reject non-positive `request_concurrency` instead of hanging service discovery indefinitely. [#19524](prometheus/prometheus#19524) - \[BUGFIX] Discovery/AWS: Avoid a panic when discovering standalone ECS tasks with custom task groups. [#19302](prometheus/prometheus#19302) - \[BUGFIX] Discovery: Do not panic in AWS Lightsail service discovery when an instance is missing optional fields such as availability zone, blueprint, bundle, name, state or support code. [#19324](prometheus/prometheus#19324) - \[BUGFIX] Discovery: delete the stale `prometheus_sd_last_update_timestamp_seconds` series for a config that is removed on reload. [#19131](prometheus/prometheus#19131) - \[BUGFIX] HTTP: Avoid truncating compressed responses when handlers set Content-Length. [#19661](prometheus/prometheus#19661) - \[BUGFIX] IONOS SD: Do not panic when the API response omits the server, NIC or volume collections, or a server's properties. [#19438](prometheus/prometheus#19438) - \[BUGFIX] Metadata will not affect the number of Remote Write v2 shards. [#19218](prometheus/prometheus#19218) - \[BUGFIX] Mixins: Fix label mismatches that prevented PrometheusHAGroupNotIngestingSamples and PrometheusHAGroupCrashlooping from firing. [#19444](prometheus/prometheus#19444) - \[BUGFIX] Native histograms: `DetectReset` no longer misses a counter reset when a populated bucket behind an empty one disappears, which could make histogram `rate()`/`increase()` undercount. [#19367](prometheus/prometheus#19367) - \[BUGFIX] Never skip histogram buckets for histogram\_stddev and histogram\_stdvar functions. [#19521](prometheus/prometheus#19521) - \[BUGFIX] OTLP: Do not abort an entire OTLP payload ingestion if one metric has no datapoints. [#19343](prometheus/prometheus#19343) - \[BUGFIX] PromQL: Fix FastRegexMatcher false-positive match when a capturing group is directly adjacent to a literal (e.g. `.*\|(foo)\|.*`). [#19516](prometheus/prometheus#19516) - \[BUGFIX] PromQL: Fix a panic in range selectors using the experimental `anchored` or `smoothed` modifier when the selected series has no samples inside the query window, for example a query evaluated inside a scrape gap. [#19431](prometheus/prometheus#19431) - \[BUGFIX] PromQL: Fix empty results when a subquery with `@` is used as the matrix argument of a call that is not step-invariant (for example `quantile_over_time(scalar(x), metric[...:...] @ T)`). [#19187](prometheus/prometheus#19187) - \[BUGFIX] PromQL: Make the "found duplicate series for the match group" many-to-many matching error message deterministic by sorting the two duplicate labels. [#18810](prometheus/prometheus#18810) - \[BUGFIX] PromQL: Preserve parentheses around duration literals on Expr.String() round-trip. [#19403](prometheus/prometheus#19403) - \[BUGFIX] PromQL: Reject duration-expression offsets and `@ start()` / `@ end()` before range selectors, matching the existing rejection of literal offsets and `@ <timestamp>`. [#19406](prometheus/prometheus#19406) - \[BUGFIX] PromQL: Report the position of the histogram argument rather than of a scalar argument in the native histogram NaN observation annotations of `histogram_quantile` and `histogram_fraction`. [#19330](prometheus/prometheus#19330) - \[BUGFIX] PromQL: info() now applies the @ modifier/offset when evaluating the info series, so info(v @ T) enriches as of T consistently instead of depending on the query start/eval time. [#19266](prometheus/prometheus#19266) - \[BUGFIX] Rules: Fix a panic when a rule manager created without a logger loads a rule file containing multiple YAML documents. [#19433](prometheus/prometheus#19433) - \[BUGFIX] Scrape: Do not append a stale marker for a series that is still exposed when the storage returns a new series reference for it. [#19328](prometheus/prometheus#19328) - \[BUGFIX] Scrape: JSON log formatter correctly format scrape target info. [#19472](prometheus/prometheus#19472) - \[BUGFIX] TSDB: Fix in-order chunk ID overflow by wrapping head chunk IDs modulo 2^23 so they never collide with the out-of-order flag bit. [#19450](prometheus/prometheus#19450) - \[BUGFIX] TSDB: Fix out-of-order chunk ID overflow by wrapping `firstOOOChunkID` modulo 2^23 instead of growing unbounded. [#19216](prometheus/prometheus#19216) - \[BUGFIX] UI: Remove an extraneous X-axis tick mark in the native histogram chart when using the "linear" display mode. [#19326](prometheus/prometheus#19326) - \[BUGFIX] discovery/aws: Avoid a panic when an ElastiCache ARN is missing its resource ID. [#19333](prometheus/prometheus#19333) - \[BUGFIX] discovery/aws: Do not panic on MSK clusters whose optional API fields are absent. [#19584](prometheus/prometheus#19584) - \[BUGFIX] discovery/aws: Do not panic when the EC2 API omits optional instance fields. [#19512](prometheus/prometheus#19512) - \[BUGFIX] discovery/aws: Don't panic on ECS tasks with absent optional fields. [#19396](prometheus/prometheus#19396) - \[BUGFIX] discovery/aws: MSK Optional Custom Configuration Fields [#19422](prometheus/prometheus#19422). [#19422](prometheus/prometheus#19422) - \[BUGFIX] discovery/ionos: Fix panic when the IONOS API omits optional server fields. [#19418](prometheus/prometheus#19418) - \[BUGFIX] discovery/kubernetes: Populate `__meta_kubernetes_service_loadbalancer_ip` from `status.loadBalancer.ingress`, falling back to deprecated `spec.loadBalancerIP`. [#19404](prometheus/prometheus#19404) - \[BUGFIX] histogram: Fix Compact moving buckets to wrong indices, and producing negative bucket counts for integer histograms, when more than one span is merged in the same pass. [#19312](prometheus/prometheus#19312) - \[BUGFIX] promtool: Fixed `tsdb dump` silently dropping native histogram samples. [#18051](prometheus/prometheus#18051) - \[BUGFIX] scrape: fix data race in `Manager.TargetsDroppedCounts` to avoid miscounting dropped targets. [#19304](prometheus/prometheus#19304) - \[BUGFIX] scrape: fix nil histogram when native and classic histograms are mixed in one metric family. [#19452](prometheus/prometheus#19452) - \[BUGFIX] TSDB: Fix WAL and GC log messages to emit human-readable duration strings instead of nanosecond integers. [#19307](prometheus/prometheus#19307) - \[BUGFIX] TSDB: Avoid WAL corruption after a failed WAL write in Agent mode. [#19700](prometheus/prometheus#19700) - \[BUGFIX] Agent: Ignore unknown WAL record types, to help users rolling back. [#19814](prometheus/prometheus#19814) </details> --- ### Configuration 📅 **Schedule**: (in timezone Europe/Paris) - Branch creation - At any time (no schedule defined) - Automerge - At any time (no schedule defined) 🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied. ♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox. 🔕 **Ignore**: Close this PR and you won't be reminded about this update again. --- - [ ] If you want to rebase/retry this PR, check this box --- This PR has been generated by [Mend Renovate CLI](https://github.com/renovatebot/renovate).  Reviewed-on: https://git.erwanleboucher.dev/eleboucher/homelab/pulls/2199

Ever since [Prometheus 3.15.0](prometheus/prometheus#18091) prometheus can scrape unix sockets. As a user could specify both a unix socket and tcp socket we disallow this configuration. We check when the unix socket is set if the tcp setup is set explicitly, see [here](https://click.palletsprojects.com/en/stable/commands-and-groups/#detecting-the-source-of-a-parameter).

IngmarStein requested a review from a team as a code owner February 15, 2026 13:00

IngmarStein requested a review from saswatamcode February 15, 2026 13:00

IngmarStein force-pushed the scrape_uds branch from 06915f0 to 9c44781 Compare February 15, 2026 14:36

weriomat approved these changes Mar 31, 2026

View reviewed changes

braydonk reviewed Apr 23, 2026

View reviewed changes

Comment thread config/config.go Resolved

Comment thread scrape/scrape.go Resolved

IngmarStein force-pushed the scrape_uds branch from e0af912 to 75044aa Compare April 23, 2026 21:00

bwplotka reviewed Jun 8, 2026

View reviewed changes

Comment thread config/config.go Resolved

Comment thread docs/configuration/configuration.md Resolved

Comment thread scrape/scrape.go Resolved

IngmarStein force-pushed the scrape_uds branch 2 times, most recently from fd277ee to 233339f Compare July 1, 2026 17:26

IngmarStein force-pushed the scrape_uds branch from 129ef26 to 9bf21ca Compare July 12, 2026 12:33

bwplotka reviewed Jul 23, 2026

View reviewed changes

Comment thread scrape/scrape.go Resolved

Comment thread scrape/target_test.go Resolved

IngmarStein force-pushed the scrape_uds branch from 32a3a84 to 8639499 Compare July 23, 2026 06:29

bwplotka reviewed Aug 4, 2026

View reviewed changes

Comment thread scrape/scrape.go Resolved

Comment thread scrape/target_test.go Resolved

IngmarStein force-pushed the scrape_uds branch 2 times, most recently from 869b8f1 to 861babf Compare August 4, 2026 19:43

bwplotka approved these changes Aug 5, 2026

View reviewed changes

Comment thread scrape/scrape.go Resolved

Comment thread scrape/scrape_test.go Resolved

Comment thread scrape/scrape_test.go Resolved

IngmarStein force-pushed the scrape_uds branch 2 times, most recently from f6b73b1 to 964a2ad Compare August 5, 2026 20:38

IngmarStein force-pushed the scrape_uds branch from 964a2ad to add5983 Compare August 6, 2026 14:01

bwplotka approved these changes Aug 6, 2026

View reviewed changes

Comment thread scrape/target.go

}

})

host := t.labels.Get(model.AddressLabel)

bwplotka Aug 6, 2026

Copy link
Copy Markdown

Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

nit: We could inline now

bwplotka merged commit c5fa89d into prometheus:main Aug 6, 2026
37 checks passed

IngmarStein deleted the scrape_uds branch August 6, 2026 15:31

KFearsoff mentioned this pull request Oct 15, 2026

Support unix socket scraping grafana/alloy#7411

Open

1 task

This was referenced Oct 16, 2026

Binding to Unix Socket prometheus/node_exporter#759

Closed

feat(web): introduce support for unix domain listeners prometheus/exporter-toolkit#460

Open

github-actions Bot mentioned this pull request Oct 19, 2026

Update prom/prometheus Docker tag to v3.15.0 claytono/infra#3239

Merged

1 task

andrelcunha mentioned this pull request Oct 25, 2026

Serve the report in Prometheus format ottermq/jaildeck#86

Merged

DatScreamer mentioned this pull request Nov 7, 2026

remote_write: support sending over a unix-domain socket #20376

Open

Conversation

IngmarStein commented Feb 15, 2026

Which issue(s) does the PR fix:

Does this PR introduce a user-facing change?

Uh oh!

weriomat left a comment

Choose a reason for hiding this comment

Uh oh!

IngmarStein commented Apr 2, 2026

Uh oh!

DragonWork commented Apr 17, 2026

Uh oh!

braydonk left a comment

Choose a reason for hiding this comment

Uh oh!

Uh oh!

Uh oh!

IngmarStein commented Apr 28, 2026

Uh oh!

IngmarStein commented May 30, 2026

Uh oh!

bwplotka left a comment

Choose a reason for hiding this comment

Uh oh!

Uh oh!

Uh oh!

Uh oh!

IngmarStein commented Jun 8, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

IngmarStein commented Jun 19, 2026

Uh oh!

roidelapluie commented Jun 25, 2026

Uh oh!

roidelapluie commented Jun 25, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

bwplotka commented Jun 25, 2026

Uh oh!

roidelapluie commented Jun 25, 2026

Uh oh!

IngmarStein commented Jun 26, 2026

Uh oh!

roidelapluie commented Jul 1, 2026

Uh oh!

IngmarStein commented Jul 1, 2026

Uh oh!

IngmarStein commented Jul 13, 2026

Uh oh!

IngmarStein commented Jul 22, 2026

Uh oh!

bwplotka left a comment • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Uh oh!

Uh oh!

bwplotka commented Jul 23, 2026

Uh oh!

IngmarStein commented Aug 1, 2026

Uh oh!

bboreham commented Aug 4, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

bwplotka left a comment • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Choose a reason for hiding this comment

Uh oh!

Uh oh!

Uh oh!

IngmarStein commented Aug 4, 2026

Uh oh!

bwplotka left a comment

Choose a reason for hiding this comment

Uh oh!

Uh oh!

Uh oh!

Uh oh!

bwplotka left a comment

Choose a reason for hiding this comment

IngmarStein commented Jun 8, 2026 •

edited

Loading

roidelapluie commented Jun 25, 2026 •

edited

Loading

bwplotka left a comment •

edited

Loading

bboreham commented Aug 4, 2026 •

edited

Loading

bwplotka left a comment •

edited

Loading