create new dual-stack flavor

templates/addons/cilium/cilium-ipv6.yaml

@@ -0,0 +1,29 @@
+apiVersion: addons.cluster.x-k8s.io/v1alpha1
+kind: HelmChartProxy
+metadata:
+  name: cilium-ipv6
+spec:
+  clusterSelector:
+    matchLabels:
+      cni: cilium
+      ipv6: "true"
+  repoURL: https://helm.cilium.io/
+  chartName: cilium
+  namespace: kube-system
+  version: ${CILIUM_VERSION:=1.15.0}
+  options:
+    waitForJobs: true
+    wait: true
+    timeout: 5m
+  valuesTemplate: |
+    ipv6:
+      enabled: true
+    ipam:
+      mode: kubernetes
+    k8s:
+      requireIPv4PodCIDR: true
+    hubble:
+      relay:
+        enabled: true
+      ui:
+        enabled: true

templates/addons/cilium/cilium.yaml

@@ -4,8 +4,9 @@ metadata:
   name: cilium
 spec:
   clusterSelector:
-    matchLabels:
-      cni: cilium
+    matchExpressions:
+      - {key: ipv6, operator: DoesNotExist}
+      - {key: cni, operator: In, values: ['cilium']}
   repoURL: https://helm.cilium.io/
   chartName: cilium
   namespace: kube-system

templates/addons/cilium/kustomization.yaml

@@ -2,3 +2,4 @@ apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
 resources:
     - cilium.yaml
+    - cilium-ipv6.yaml

templates/common-init-files/secret.yaml

@@ -22,6 +22,7 @@ stringData:
     net.bridge.bridge-nf-call-iptables  = 1
     net.bridge.bridge-nf-call-ip6tables = 1
     net.ipv4.ip_forward                 = 1
+    net.ipv6.conf.all.forwarding        = 1
   kubeadm-pre-init.sh: |
     #!/bin/bash
     set -euo pipefail

templates/flavors/dual-stack/kustomization.yaml

@@ -0,0 +1,42 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+resources:
+  - ../default
+
+patches:
+  - target:
+      group: cluster.x-k8s.io
+      version: v1beta1
+      kind: Cluster
+    patch: |-
+      apiVersion: cluster.x-k8s.io/v1beta1
+      kind: Cluster
+      metadata:
+        name: ${CLUSTER_NAME}
+        labels:
+          ipv6: true
+      spec:
+        clusterNetwork:
+          pods:
+            cidrBlocks:
+              - 10.192.0.0/10
+              - fd02::/80
+          services:
+            cidrBlocks:
+              - 10.96.0.0/12
+              - fd03::/108
+  - target:
+      group: controlplane.cluster.x-k8s.io
+      version: v1beta1
+      kind: KubeadmControlPlane
+    patch: |-
+      apiVersion: controlplane.cluster.x-k8s.io/v1beta1
+      kind: KubeadmControlPlane
+      metadata:
+        name: ${CLUSTER_NAME}-control-plane
+      spec:
+        kubeadmConfigSpec:
+          clusterConfiguration:
+            controllerManager:
+              extraArgs:
+                node-cidr-mask-size-ipv6: "96"