Helm: add support for setting an s3 backoff_config via the loki helm chart (#11458)

**What this PR does / why we need it**:
Currently the Loki helm chart does not support defining s3 backoff
config settings. This PR adds support to the loki.commonStorageConfig
helper to add backoff config options when they're specified in the helm
values
**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
- [ ] `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](d10549e3ec)
- [ ] 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](0d4416a4b0)

---------

Co-authored-by: Michel Hollands <42814411+MichelHollands@users.noreply.github.com>

docs/sources/setup/install/helm/reference.md

@@ -2252,6 +2252,7 @@ null
   },
   "s3": {
     "accessKeyId": null,
+    "backoff_config": {},
     "endpoint": null,
     "http_config": {},
     "insecure": false,
@@ -2285,6 +2286,15 @@ null
   "type": "s3"
 }
 </pre>
+</td>
+		</tr>
+		<tr>
+			<td>loki.storage.s3.backoff_config</td>
+			<td>object</td>
+			<td>Check https://grafana.com/docs/loki/latest/configure/#s3_storage_config for more info on how to provide a backoff_config</td>
+			<td><pre lang="json">
+{}
+</pre>
 </td>
 		</tr>
 		<tr>

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.)
 
+## 5.41.3
+
+- [FEATURE] Add support for defining an s3 backoff config.
+
 ## 5.41.2
 
 - [FEATURE] Add ciliumnetworkpolicies.

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: 5.41.2
+version: 5.41.3
 home: https://grafana.github.io/helm-charts
 sources:
   - https://github.com/grafana/loki

production/helm/loki/README.md

@@ -1,6 +1,6 @@
 # loki
 
-![Version: 5.41.2](https://img.shields.io/badge/Version-5.41.2-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: 5.41.3](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)
 
 Helm chart for Grafana Loki in simple, scalable mode
 

production/helm/loki/templates/_helpers.tpl

@@ -245,7 +245,20 @@ s3:
     ca_file: {{ . }}
     {{- end}}
   {{- end }}
+  {{- with .backoff_config}}
+  backoff_config:
+    {{- with .min_period }}
+    min_period: {{ . }}
+    {{- end}}
+    {{- with .max_period }}
+    max_period: {{ . }}
+    {{- end}}
+    {{- with .max_retries }}
+    max_retries: {{ . }}
+    {{- end}}
+  {{- end }}
 {{- end -}}
+
 {{- else if eq .Values.loki.storage.type "gcs" -}}
 {{- with .Values.loki.storage.gcs }}
 gcs:

production/helm/loki/values.yaml

@@ -285,6 +285,8 @@ loki:
       s3ForcePathStyle: false
       insecure: false
       http_config: {}
+      # -- Check https://grafana.com/docs/loki/latest/configure/#s3_storage_config for more info on how to provide a backoff_config
+      backoff_config: {}
     gcs:
       chunkBufferSize: 0
       requestTimeout: "0s"