feat(helm): add topology spread constraints configuration to StatefulSet (#3187)

Co-authored-by: houseme <housemecn@gmail.com>

helm/README.md

@@ -152,6 +152,8 @@ uer. `ClusterIssuer` or `Issuer`. |
 | storageclass.pvcAnnotations.data | map | `{}` | Data pvc customized annotations. |
 | storageclass.pvcAnnotations.logs | map | `{}` | Logs pvc customized annotations. |
 | tolerations | list | `[]` |  |
+| topologySpreadConstraints.enabled | bool | `false` | Enable custom topology spread constraints on distributed-mode StatefulSet pods. |
+| topologySpreadConstraints.constraints | list | `[]` | Raw `spec.template.spec.topologySpreadConstraints` entries applied to the distributed StatefulSet when enabled. |
 | gatewayApi.enabled | bool | `false` | To enable/disable gateway api support. |
 | gatewayApi.gatewayClass | string | `traefik` | Gateway class implementation. |
 | gatewayApi.listeners.http.name | string | `web` | Gateway API http listener name. |

helm/rustfs/templates/statefulset.yaml

@@ -60,6 +60,10 @@ spec:
       tolerations:
         {{- toYaml .Values.tolerations | nindent 8 }}
       {{- end }}
+      {{- if and .Values.topologySpreadConstraints.enabled .Values.topologySpreadConstraints.constraints }}
+      topologySpreadConstraints:
+        {{- toYaml .Values.topologySpreadConstraints.constraints | nindent 8 }}
+      {{- end }}
       securityContext:
         {{- toYaml .Values.podSecurityContext | nindent 8 }}
       initContainers:

helm/rustfs/values.yaml

@@ -302,6 +302,16 @@ affinity:
     topologyKey: kubernetes.io/hostname
   nodeAffinity: {}
 
+topologySpreadConstraints:
+  enabled: false
+  constraints: []
+    # - maxSkew: 1
+    #   topologyKey: topology.kubernetes.io/zone
+    #   whenUnsatisfiable: ScheduleAnyway
+    #   labelSelector:
+    #     matchLabels:
+    #       app.kubernetes.io/name: rustfs
+
 storageclass:
   name: local-path
   dataStorageSize: 256Mi