feat(helm): allow set topologySpreadConstraints on singleBinary

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

@@ -12825,6 +12825,15 @@ null
 			<td><pre lang="json">
 []
 </pre>
+</td>
+		</tr>
+		<tr>
+			<td>singleBinary.topologySpreadConstraints</td>
+			<td>list</td>
+			<td>Topology Spread Constraints for single binary pods The value will be passed through tpl.</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
 
+- [FEATURE] Add configurable `singleBinary.topologySpreadConstraints`. [#19534](https://github.com/grafana/loki/pull/19534)
+
 ## 6.45.2
 
 - [BUGFIX] Fix incorrect GEL version in the chart and reference.

production/helm/loki/templates/single-binary/statefulset.yaml

@@ -65,6 +65,10 @@ spec:
         {{- end }}
         app.kubernetes.io/part-of: memberlist
     spec:
+      {{- with .Values.singleBinary.topologySpreadConstraints }}
+      topologySpreadConstraints:
+        {{- tpl ( . | toYaml) $ | nindent 8 }}
+      {{- end }}
       serviceAccountName: {{ include "loki.serviceAccountName" . }}
       automountServiceAccountToken: {{ .Values.serviceAccount.automountServiceAccountToken }}
       {{ include "loki.enableServiceLinks" . }}

production/helm/loki/values.yaml

@@ -1499,6 +1499,9 @@ singleBinary:
               app.kubernetes.io/name: '{{ include "loki.name" . }}'
               app.kubernetes.io/instance: '{{ .Release.Name }}'
           topologyKey: kubernetes.io/hostname
+  # -- Topology Spread Constraints for single binary pods
+  # The value will be passed through tpl.
+  topologySpreadConstraints: []
   # -- DNS config for single binary pods
   dnsConfig: {}
   # -- Node selector for single binary pods