From 1ad3e886373165b3d13af01fc2bdaceeaba81b00 Mon Sep 17 00:00:00 2001
From: Ludovic Ortega <ludovic.ortega@adminafk.fr>
Date: Mon, 18 Nov 2024 16:56:37 +0100
Subject: [PATCH] feat: add support for dual stack clusters (#250)

Signed-off-by: Ludovic Ortega <ludovic.ortega@adminafk.fr>
Co-authored-by: Itay Grudev <itay.grudev@essentim.com>
---
 charts/cloudnative-pg/README.md              | 2 ++
 charts/cloudnative-pg/templates/service.yaml | 6 ++++++
 charts/cloudnative-pg/values.schema.json     | 6 ++++++
 charts/cloudnative-pg/values.yaml            | 4 ++++
 4 files changed, 18 insertions(+)

diff --git a/charts/cloudnative-pg/README.md b/charts/cloudnative-pg/README.md
index a9e569466..f78461cfc 100644
--- a/charts/cloudnative-pg/README.md
+++ b/charts/cloudnative-pg/README.md
@@ -67,6 +67,8 @@ CloudNativePG Operator Helm Chart
 | rbac.create | bool | `true` | Specifies whether ClusterRole and ClusterRoleBinding should be created. |
 | replicaCount | int | `1` |  |
 | resources | object | `{}` |  |
+| service.ipFamilies | list | `[]` | Sets the families that should be supported and the order in which they should be applied to ClusterIP as well. Can be IPv4 and/or IPv6. |
+| service.ipFamilyPolicy | string | `""` | Set the ip family policy to configure dual-stack see [Configure dual-stack](https://kubernetes.io/docs/concepts/services-networking/dual-stack/#services) |
 | service.name | string | `"cnpg-webhook-service"` | DO NOT CHANGE THE SERVICE NAME as it is currently used to generate the certificate and can not be configured |
 | service.port | int | `443` |  |
 | service.type | string | `"ClusterIP"` |  |
diff --git a/charts/cloudnative-pg/templates/service.yaml b/charts/cloudnative-pg/templates/service.yaml
index fc8a4127e..eeed3418d 100644
--- a/charts/cloudnative-pg/templates/service.yaml
+++ b/charts/cloudnative-pg/templates/service.yaml
@@ -26,6 +26,12 @@ metadata:
   {{- end }}
 spec:
   type: {{ .Values.service.type }}
+  {{- if .Values.service.ipFamilyPolicy }}
+  ipFamilyPolicy: {{ .Values.service.ipFamilyPolicy }}
+  {{- end }}
+  {{- if .Values.service.ipFamilies }}
+  ipFamilies: {{ .Values.service.ipFamilies | toYaml | nindent 2 }}
+  {{- end }}
   ports:
   - port: {{ .Values.service.port }}
     targetPort: webhook-server
diff --git a/charts/cloudnative-pg/values.schema.json b/charts/cloudnative-pg/values.schema.json
index 63fba0454..762bb54d1 100644
--- a/charts/cloudnative-pg/values.schema.json
+++ b/charts/cloudnative-pg/values.schema.json
@@ -206,6 +206,12 @@
         "service": {
             "type": "object",
             "properties": {
+                "ipFamilies": {
+                    "type": "array"
+                },
+                "ipFamilyPolicy": {
+                    "type": "string"
+                },
                 "name": {
                     "type": "string"
                 },
diff --git a/charts/cloudnative-pg/values.yaml b/charts/cloudnative-pg/values.yaml
index a95165ffd..c39912580 100644
--- a/charts/cloudnative-pg/values.yaml
+++ b/charts/cloudnative-pg/values.yaml
@@ -126,6 +126,10 @@ service:
   # and can not be configured
   name: cnpg-webhook-service
   port: 443
+  # -- Set the ip family policy to configure dual-stack see [Configure dual-stack](https://kubernetes.io/docs/concepts/services-networking/dual-stack/#services)
+  ipFamilyPolicy: ""
+  # -- Sets the families that should be supported and the order in which they should be applied to ClusterIP as well. Can be IPv4 and/or IPv6.
+  ipFamilies: []
 
 resources: {}
   # If you want to specify resources, uncomment the following