helm: support endpoint_suffix for azure storage (#9791)

**What this PR does / why we need it**:
According the [official
document](https://grafana.com/docs/loki/latest/storage/#using-account-name-and-key),
support storage_config.azure.endpoint_suffix, example
blob.core.chinacloudapi.cn

**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**)
- [x] 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/upgrading/_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)

---------

Co-authored-by: Michel Hollands <42814411+MichelHollands@users.noreply.github.com>
Co-authored-by: J Stickler <julie.stickler@grafana.com>

docs/sources/installation/helm/reference.md

@@ -2107,6 +2107,7 @@ null
   "azure": {
     "accountKey": null,
     "accountName": null,
+    "endpointSuffix": null,
     "requestTimeout": null,
     "useFederatedToken": false,
     "useManagedIdentity": false,

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.)
 
+## 5.8.8
+
+- [ENHANCEMENT] Add loki.storage.azure.endpointSuffix to support Azure private endpoint
+
 ## 5.8.7
 
 - [BUGFIX] Remove persistentVolumeClaimRetentionPolicy from single-binary StatefulSet when persistence is disabled

production/helm/loki/Chart.yaml

@@ -3,7 +3,7 @@ name: loki
 description: Helm chart for Grafana Loki in simple, scalable mode
 type: application
 appVersion: 2.8.2
-version: 5.8.7
+version: 5.8.8
 home: https://grafana.github.io/helm-charts
 sources:
   - https://github.com/grafana/loki

production/helm/loki/README.md

@@ -1,6 +1,6 @@
 # loki
 
-![Version: 5.8.7](https://img.shields.io/badge/Version-5.8.7-informational?style=flat-square) ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square) ![AppVersion: 2.8.2](https://img.shields.io/badge/AppVersion-2.8.2-informational?style=flat-square)
+![Version: 5.8.8](https://img.shields.io/badge/Version-5.8.8-informational?style=flat-square) ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square) ![AppVersion: 2.8.2](https://img.shields.io/badge/AppVersion-2.8.2-informational?style=flat-square)
 
 Helm chart for Grafana Loki in simple, scalable mode
 

production/helm/loki/templates/_helpers.tpl

@@ -270,6 +270,9 @@ azure:
   {{- with .requestTimeout }}
   request_timeout: {{ . }}
   {{- end }}
+  {{- with .endpointSuffix }}
+  endpoint_suffix: {{ . }}
+  {{- end }}
 {{- end -}}
 {{- else -}}
 {{- with .Values.loki.storage.filesystem }}
@@ -337,6 +340,9 @@ azure:
   {{- with .requestTimeout }}
   request_timeout: {{ . }}
   {{- end }}
+  {{- with .endpointSuffix }}
+  endpoint_suffix: {{ . }}
+  {{- end }}
 {{- end -}}
 {{- else }}
 type: "local"

production/helm/loki/values.yaml

@@ -283,6 +283,7 @@ loki:
       useFederatedToken: false
       userAssignedId: null
       requestTimeout: null
+      endpointSuffix: null
     filesystem:
       chunks_directory: /var/loki/chunks
       rules_directory: /var/loki/rules