Release 2.9.4 (#11758)

**What this PR does / why we need it**:
Updates changelog and release notes for 2.9.4 patch release

**Checklist**
- [x] Reviewed the
[`CONTRIBUTING.md`](https://github.com/grafana/loki/blob/main/CONTRIBUTING.md)
guide (**required**)
- [x] Documentation added
- [x] `CHANGELOG.md` updated

CHANGELOG.md

@@ -1,21 +1,24 @@
-## Unreleased
+## 2.9.4 (2024-01-24)
 
 ### All Changes
 
 #### Loki
 
 ##### Fixes
 
-* [11606](https://github.com/grafana/loki/pull/11606) **dannykopping** Fixed regression adding newlines to HTTP error response bodies which may break client integrations.
 * [11601](https://github.com/grafana/loki/pull/11601) **dannykopping** Ruler: Fixed a panic that can be caused by concurrent read-write access of tenant configs when there are a large amount of rules.
+* [11612](https://github.com/grafana/loki/pull/11612) **dannykopping** Ruler: catering for another data race in tenant config.
 * [11657](https://github.com/grafana/loki/pull/11657) **ashwanthgoli** Log results cache: compose empty response based on the request being served to avoid returning incorrect limit or direction.
 * [11654](https://github.com/grafana/loki/pull/11654) **dannykopping** Cache: atomically check background cache size limit correctly. 
 * [11587](https://github.com/grafana/loki/pull/11587) **trevorwhitney** Fix semantics of label parsing logic of metrics and logs queries. Both only parse the first label if multiple extractions into the same label are requested.
 
+#### Promtail
+* [11511](https://github.com/grafana/loki/pull/11511) **kavirajk**: chore(promtail): Improve default configuration that is shipped with rpm/deb packages to avoid possible high CPU utilisation if there are lots of files inside `/var/log`.
+
 ##### Security
 * [11745](https://github.com/grafana/loki/pull/11745) Update `golang.org/x/crypto` to `v0.18.0`
 
-## 2.9.3 (2023-10-16)
+## 2.9.3 (2023-12-11)
 
 ### All Changes
 
@@ -30,52 +33,6 @@
 ##### Changes
 
 * [11121](https://github.com/grafana/loki/pull/11121) **periklis** Ensure all lifecycler cfgs ref a valid IPv6 addr and port combination
-* [10650](https://github.com/grafana/loki/pull/10650) **matthewpi** Ensure the frontend uses a valid IPv6 addr and port combination
-* [11665](https://github.com/grafana/loki/pull/11665) **salvacorts** Deprecate and flip `-legacy-read-mode` flag to `false` by default.
-
-#### Promtail
-
-* [10752](https://github.com/grafana/loki/pull/10752) **gonzalesraul**: structured_metadata: enable structured_metadata convert labels
-* [11511](https://github.com/grafana/loki/pull/11511) **kavirajk**: chore(promtail): Improve default configuration that is shipped with rpm/deb packages to avoid possible high CPU utilisation if there are lots of files inside `/var/log`.
-
-##### Enhancements
-
-* [10416](https://github.com/grafana/loki/pull/10416) **lpugoy**: Lambda-Promtail: Add support for WAF logs in S3
-* [10301](https://github.com/grafana/loki/pull/10301) **wildum**: users can now define `additional_fields` in cloudflare configuration.
-* [10755](https://github.com/grafana/loki/pull/10755) **hainenber**: Lambda-Promtail: Add support for dropping labels passed via env var
-
-##### Changes
-
-* [10677](https://github.com/grafana/loki/pull/10677) **chaudum** Remove deprecated `stream_lag_labels` setting from both the `options` and `client` configuration sections.
-* [10689](https://github.com/grafana/loki/pull/10689) **dylanguedes**: Ingester: Make jitter to be 20% of flush check period instead of 1%.
-* [11420](https://github.com/grafana/loki/pull/11420) **zry98**: Show a clearer reason in "disable watchConfig" log message when server is disabled.
-
-##### Fixes
-
-* [10631](https://github.com/grafana/loki/pull/10631) **thampiotr**: Fix race condition in cleaning up metrics when stopping to tail files.
-* [10798](https://github.com/grafana/loki/pull/10798) **hainenber**: Fix agent panicking after reloaded due to duplicate metric collector registration.
-* [10848](https://github.com/grafana/loki/pull/10848) **rgroothuijsen**: Correctly parse list of drop stage sources from YAML.
-
-#### LogCLI
-
-#### Mixins
-
-* [11087](https://github.com/grafana/loki/pull/11087) **JoaoBraveCoding**: Adds structured metadata panels for ingested data
-* [11637](https://github.com/grafana/loki/pull/11637) **JoaoBraveCoding**: Add route to write Distributor Latency dashboard
-
-#### Fixes
-
-#### FluentD
-
-#### Jsonnet
-
-* [11312](https://github.com/grafana/loki/pull/11312) **sentoz**: Loki ksonnet: Do not generate configMap for consul if you are using memberlist
-
-* [11020](https://github.com/grafana/loki/pull/11020) **ashwanthgoli**: Loki ksonnet: Do not generate table-manager manifests if shipper store is in-use.
-
-* [10784](https://github.com/grafana/loki/pull/10894) **slim-bean** Update index gateway client to use a headless service.
-
-* [10542](https://github.com/grafana/loki/pull/10542) **chaudum**: Remove legacy deployment mode for ingester (Deployment, without WAL) and instead always run them as StatefulSet.
 
 ## 2.9.2 (2023-10-16)
 

docs/sources/release-notes/v2-9.md

@@ -32,20 +32,29 @@ Grafana Labs is excited to announce the release of Loki 2.9.0 Here's a summary o
 
 ## Bug fixes
 
-### 2.9.1 (2023-09-14)
+### 2.9.4 (2024-01-24)
 
-* Update Docker base images to mitigate security vulnerability CVE-2022-48174
-* Fix bugs in indexshipper (`tsdb`, `boltdb-shipper`) that could result in not showing all ingested logs in query results.
+* Fixed a couple of data races that can cause panics due to concurrent read-write access of tenant configs.
+* Fixed a bug in the log results cache.
+* Fixed the cache to atomically check background cache size limit correctly.
+* Fixed the discrepancy between the semantics of logs and metrics queries.
+* Fixed promtail default scrape config causing CPU and memory load
+* Update `golang.org/x/crypto` to `v0.18.0`
+
+### 2.9.3 (2023-12-11)
+
+* Upgrade otelhttp from 0.40.0 -> 0.44.0 and base alpine image from 3.18.3 -> 3.18.5 to fix a few CVES (CVE-2023-45142, CVE-2022-21698, CVE-2023-5363).
+* Fix querying ingester for label values with a matcher (previously didn't respect the matcher).
+* Ensure all lifecycler cfgs ref a valid IPv6 addr and port combination
 
 ### 2.9.2 (2023-10-16)
 
 * Upgrade go to v1.21.3, golang.org/x/net to v0.17.0 and grpc-go to v1.56.3 to patch CVE-2023-39325 / CVE-2023-44487
 
 For a full list of all changes and fixes, look at the [CHANGELOG](https://github.com/grafana/loki/blob/release-2.9.x/CHANGELOG.md).
 
-### 2.9.3 (2023-12-11)
+### 2.9.1 (2023-09-14)
 
-* Upgrade otelhttp from 0.40.0 -> 0.44.0 and base alpine image from 3.18.3 -> 3.18.5 to fix a few CVES (CVE-2023-45142, CVE-2022-21698, CVE-2023-5363).
-* Fix querying ingester for label values with a matcher (previously didn't respect the matcher).
-* Ensure all lifecycler cfgs ref a valid IPv6 addr and port combination
+* Update Docker base images to mitigate security vulnerability CVE-2022-48174
+* Fix bugs in indexshipper (`tsdb`, `boltdb-shipper`) that could result in not showing all ingested logs in query results.