Helm: Allows loki s3 http_config block to be configured (#7041)

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

This will allow users of the chart to configure the s3 http_config block
as documented here
[https://grafana.com/docs/loki/latest/configuration/#s3_storage_config](https://grafana.com/docs/loki/latest/configuration/#s3_storage_config)
through values.

**Which issue(s) this PR fixes**:
Fixes grafana/helm-charts#1762

**Checklist**
- [x] Documentation added
- [x] Tests updated
- [ ] Is this an important fix or new feature? Add an entry in the
`CHANGELOG.md`.
- [ ] Changes that require user attention or interaction to upgrade are
documented in `docs/sources/upgrading/_index.md`

Signed-off-by: CAJNA Jarod <[email protected]>

production/helm/loki/Chart.yaml

@@ -3,7 +3,7 @@ name: loki
 description: Helm chart for Grafana Loki in simple, scalable mode
 type: application
 appVersion: 2.6.1
-version: 3.0.5
+version: 3.0.6
 home: https://grafana.github.io/helm-charts
 sources:
   - https://github.com/grafana/loki

production/helm/loki/README.md

@@ -1,6 +1,6 @@
 # loki
 
-![Version: 3.0.5](https://img.shields.io/badge/Version-3.0.5-informational?style=flat-square) ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square) ![AppVersion: 2.6.1](https://img.shields.io/badge/AppVersion-2.6.1-informational?style=flat-square)
+![Version: 3.0.6](https://img.shields.io/badge/Version-3.0.6-informational?style=flat-square) ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square) ![AppVersion: 2.6.1](https://img.shields.io/badge/AppVersion-2.6.1-informational?style=flat-square)
 
 Helm chart for Grafana Loki in simple, scalable mode
 
@@ -256,7 +256,7 @@ monitoring:
 | loki.revisionHistoryLimit | int | `10` | The number of old ReplicaSets to retain to allow rollback |
 | loki.schemaConfig | object | `{}` | Check https://grafana.com/docs/loki/latest/configuration/#schema_config for more info on how to configure schemas |
 | loki.serverConfig | object | `{"grpc_listen_port":9095,"http_listen_port":3100}` | Check https://grafana.com/docs/loki/latest/configuration/#server for more info on the server configuration. |
-| loki.storage | object | `{"bucketNames":{"admin":"admin","chunks":"chunks","ruler":"ruler"},"filesystem":{"chunks_directory":"/var/loki/chunks","rules_directory":"/var/loki/rules"},"gcs":{"chunkBufferSize":0,"enableHttp2":true,"requestTimeout":"0s"},"s3":{"accessKeyId":null,"endpoint":null,"insecure":false,"region":null,"s3":null,"s3ForcePathStyle":false,"secretAccessKey":null},"type":"s3"}` | Storage config. Providing this will automatically populate all necessary storage configs in the templated config. |
+| loki.storage | object | `{"bucketNames":{"admin":"admin","chunks":"chunks","ruler":"ruler"},"filesystem":{"chunks_directory":"/var/loki/chunks","rules_directory":"/var/loki/rules"},"gcs":{"chunkBufferSize":0,"enableHttp2":true,"requestTimeout":"0s"},"s3":{"accessKeyId":null,"endpoint":null,"http_config":{},"insecure":false,"region":null,"s3":null,"s3ForcePathStyle":false,"secretAccessKey":null},"type":"s3"}` | Storage config. Providing this will automatically populate all necessary storage configs in the templated config. |
 | loki.storage_config | object | `{"hedging":{"at":"250ms","max_per_second":20,"up_to":3}}` | Additional storage config |
 | loki.structuredConfig | object | `{}` | Structured loki configuration, takes precedence over `loki.config`, `loki.schemaConfig`, `loki.storageConfig` |
 | minio | object | `{"buckets":[{"name":"chunks","policy":"none","purge":false},{"name":"ruler","policy":"none","purge":false},{"name":"admin","policy":"none","purge":false}],"drivesPerNode":2,"enabled":false,"persistence":{"size":"5Gi"},"replicas":1,"resources":{"requests":{"cpu":"100m","memory":"128Mi"}},"rootPassword":"supersecret","rootUser":"enterprise-logs"}` | ----------------------------------- |

production/helm/loki/templates/_helpers.tpl

@@ -171,6 +171,21 @@ s3:
   {{- end }}
   s3forcepathstyle: {{ .s3ForcePathStyle }}
   insecure: {{ .insecure }}
+  {{- with .http_config}}
+  http_config:
+    {{- with .idle_conn_timeout }}
+    idle_conn_timeout: {{ . }}
+    {{- end}}
+    {{- with .response_header_timeout }}
+    response_header_timeout: {{ . }}
+    {{- end}}
+    {{- with .insecure_skip_verify }}
+    insecure_skip_verify: {{ . }}
+    {{- end}}
+    {{- with .ca_file}}
+    ca_file: {{ . }}
+    {{- end}}
+  {{- end }}
 {{- end -}}
 {{- else if eq .Values.loki.storage.type "gcs" -}}
 {{- with .Values.loki.storage.gcs }}

production/helm/loki/values.yaml

@@ -193,6 +193,7 @@ loki:
       accessKeyId: null
       s3ForcePathStyle: false
       insecure: false
+      http_config: {}
     gcs:
       chunkBufferSize: 0
       requestTimeout: "0s"