feat(helm): add ability to specify index-gateway container lifecycle

Author: anggerdeni

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

@@ -5467,6 +5467,7 @@ null
   },
   "initContainers": [],
   "joinMemberlist": true,
+  "lifecycle": {},
   "maxUnavailable": null,
   "nodeSelector": {},
   "persistence": {
@@ -5645,6 +5646,15 @@ null
 			<td><pre lang="json">
 true
 </pre>
+</td>
+		</tr>
+		<tr>
+			<td>indexGateway.lifecycle</td>
+			<td>object</td>
+			<td>Lifecycle for the index-gateway container</td>
+			<td><pre lang="json">
+{}
+</pre>
 </td>
 		</tr>
 		<tr>

production/helm/loki/CHANGELOG.md

@@ -13,6 +13,8 @@ Entries should include a reference to the pull request that introduced the chang
 
 ## Unreleased
 
+- [ENHANCEMENT] Add the ability to specify index-gateway container lifecycle. [#19573](https://github.com/grafana/loki/pull/19573)
+
 ## 6.43.0
 
 - [BREAKING]  **Loki UI has been completely removed from the Helm chart.**  The experimental Loki UI has been moved to a [Grafana Plugin] (https://github.com/grafana/loki-operational-ui). Enabling the UI in the Helm chart will now only enable the APIs needed by the plugin, and will host them on the querier. The gateway will now forward all UI requests to the queriers. Users who previously had `loki.ui.enabled: true` should remove this configuration and migrate to the Grafana Loki plugin for UI functionality. [#19390](https://github.com/grafana/loki/pull/19390)

production/helm/loki/templates/index-gateway/statefulset-index-gateway.yaml

@@ -130,6 +130,10 @@ spec:
             {{- end }}
           resources:
             {{- toYaml .Values.indexGateway.resources | nindent 12 }}
+          {{- with .Values.indexGateway.lifecycle }}
+          lifecycle:
+            {{- toYaml . | nindent 12 }}
+          {{- end }}
         {{- if .Values.indexGateway.extraContainers }}
         {{- toYaml .Values.indexGateway.extraContainers | nindent 8}}
         {{- end }}

production/helm/loki/values.yaml

@@ -2593,6 +2593,8 @@ indexGateway:
   initContainers: []
   # -- Grace period to allow the index-gateway to shutdown before it is killed.
   terminationGracePeriodSeconds: 300
+  # -- Lifecycle for the index-gateway container
+  lifecycle: {}
   # -- Affinity for index-gateway pods.
   # @default -- Hard node anti-affinity
   # The value will be passed through tpl.