Helm: Use /ingester/shutdown endpoint in write pod for preStop ho…

…ok (#11490)

**What this PR does / why we need it**:

**Which issue(s) this PR fixes**:
Fixes #<issue number>

**Special notes for your reviewer**:

**Checklist**
- [x] Reviewed the
[`CONTRIBUTING.md`](https://github.com/grafana/loki/blob/main/CONTRIBUTING.md)
guide (**required**)
- [ ] Documentation added
- [ ] Tests updated
- [x] `CHANGELOG.md` updated
- [ ] If the change is worth mentioning in the release notes, add
`add-to-release-notes` label
- [ ] Changes that require user attention or interaction to upgrade are
documented in `docs/sources/setup/upgrade/_index.md`
- [x] For Helm chart changes bump the Helm chart version in
`production/helm/loki/Chart.yaml` and update
`production/helm/loki/CHANGELOG.md` and
`production/helm/loki/README.md`. [Example
PR](d10549e)
- [ ] If the change is deprecating or removing a configuration option,
update the `deprecated-config.yaml` and `deleted-config.yaml` files
respectively in the `tools/deprecated-config-checker` directory.
[Example
PR](0d4416a)

CHANGELOG.md

@@ -49,6 +49,7 @@
 
 ##### Changes
 
+* [11490](https://github.com/grafana/loki/pull/11490) **andresperezl**: Helm: Use `/ingester/shutdown` for `preStop` hook in write pods.
 * [10366](https://github.com/grafana/loki/pull/10366) **shantanualsi** Upgrade thanos objstore, dskit and other modules
 * [10451](https://github.com/grafana/loki/pull/10451) **shantanualsi** Upgrade thanos `objstore`
 * [10814](https://github.com/grafana/loki/pull/10814) **shantanualsi,kaviraj** Upgrade prometheus to v0.47.1 and dskit

production/helm/loki/CHANGELOG.md

@@ -13,6 +13,10 @@ Entries should include a reference to the pull request that introduced the chang
 
 [//]: # (<AUTOMATED_UPDATES_LOCATOR> : do not remove this line. This locator is used by the CI pipeline to automatically create a changelog entry for each new Loki release. Add other chart versions and respective changelog entries bellow this line.)
 
+## 5.41.4
+
+- [CHANGE] Use `/ingester/shutdown?terminate=false` for write `preStop` hook
+
 ## 5.41.3
 
 - [FEATURE] Add support for defining an s3 backoff config.

production/helm/loki/Chart.yaml

@@ -3,7 +3,7 @@ name: loki
 description: Helm chart for Grafana Loki in simple, scalable mode
 type: application
 appVersion: 2.9.3
-version: 5.41.3
+version: 5.41.4
 home: https://grafana.github.io/helm-charts
 sources:
   - https://github.com/grafana/loki

production/helm/loki/README.md

@@ -1,6 +1,6 @@
 # loki
 
-![Version: 5.41.3](https://img.shields.io/badge/Version-5.41.3-informational?style=flat-square) ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square) ![AppVersion: 2.9.3](https://img.shields.io/badge/AppVersion-2.9.3-informational?style=flat-square)
+![Version: 5.41.4](https://img.shields.io/badge/Version-5.41.4-informational?style=flat-square) ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square) ![AppVersion: 2.9.3](https://img.shields.io/badge/AppVersion-2.9.3-informational?style=flat-square)
 
 Helm chart for Grafana Loki in simple, scalable mode
 

production/helm/loki/templates/write/statefulset-write.yaml

@@ -119,7 +119,7 @@ spec:
           lifecycle:
             preStop:
               httpGet:
-                path: "/ingester/flush_shutdown"
+                path: "/ingester/shutdown?terminate=false"
                 port: http-metrics
           {{- end }}
           volumeMounts: