Feature/topology spread constraints (#2703)

Problem: Currently the helm chart does not allow us to configure topologySpreadConstraints.

Solution: Add topologySpreadConstraints option to the helm chart

Author: Robsta86

charts/nginx-gateway-fabric/README.md

@@ -307,6 +307,7 @@ The following table lists the configurable parameters of the NGINX Gateway Fabri
 | `serviceAccount.name` | The name of the service account of the NGINX Gateway Fabric pods. Used for RBAC. | string | Autogenerated if not set or set to "" |
 | `terminationGracePeriodSeconds` | The termination grace period of the NGINX Gateway Fabric pod. | int | `30` |
 | `tolerations` | Tolerations for the NGINX Gateway Fabric pod. | list | `[]` |
+| `topologySpreadConstraints` | The topology spread constraints for the NGINX Gateway Fabric pod. | list | `[]` |
 
 ----------------------------------------------
 Autogenerated from chart metadata using [helm-docs](https://github.com/norwoodj/helm-docs)

charts/nginx-gateway-fabric/templates/deployment.yaml

@@ -29,6 +29,10 @@ spec:
         {{- end }}
       {{- end }}
     spec:
+      {{- if .Values.topologySpreadConstraints }}
+      topologySpreadConstraints:
+        {{- toYaml .Values.topologySpreadConstraints | nindent 8 }}
+      {{- end }}
       initContainers:
       - name: copy-nginx-config
         image: {{ .Values.nginxGateway.image.repository }}:{{ default .Chart.AppVersion .Values.nginxGateway.image.tag }}

charts/nginx-gateway-fabric/values.schema.json

@@ -676,6 +676,15 @@
       "required": [],
       "title": "tolerations",
       "type": "array"
+    },
+    "topologySpreadConstraints": {
+      "description": "The topology spread constraints for the NGINX Gateway Fabric pod.",
+      "items": {
+        "required": []
+      },
+      "required": [],
+      "title": "topologySpreadConstraints",
+      "type": "array"
     }
   },
   "required": [],

charts/nginx-gateway-fabric/values.yaml

@@ -260,6 +260,9 @@ nodeSelector: {}
 # -- The affinity of the NGINX Gateway Fabric pod.
 affinity: {}
 
+# -- The topology spread constraints for the NGINX Gateway Fabric pod.
+topologySpreadConstraints: []
+
 serviceAccount:
   # -- Set of custom annotations for the NGINX Gateway Fabric service account.
   annotations: {}