enable dual stack by default

So we can connect to IPv6 upstream
Signed-off-by: spacewander <[email protected]>

e2e/Makefile

@@ -34,7 +34,7 @@ helm: $(LOCALBIN)
 
 .PHONY: create-cluster
 create-cluster: kind kubectl
-	$(KIND) create cluster --name htnn --image kindest/node:v$(MIN_K8S_VERSION)
+	$(KIND) create cluster --name htnn --image kindest/node:v$(MIN_K8S_VERSION) --config=kind_cluster.yaml
 	$(KUBECTL) apply -f https://github.com/kubernetes-sigs/gateway-api/releases/download/v$(GATEWAY_API_VERSION)/standard-install.yaml
 	$(KUBECTL) apply -f https://github.com/kubernetes-sigs/gateway-api/releases/download/v$(GATEWAY_API_VERSION)/experimental-install.yaml
 

e2e/kind_cluster.yaml

@@ -0,0 +1,4 @@
+kind: Cluster
+apiVersion: kind.x-k8s.io/v1alpha4
+networking:
+  ipFamily: dual

manifests/charts/htnn-controller/values.yaml

@@ -35,6 +35,7 @@ pilot:
     PILOT_ENABLE_HTNN: "true"
     PILOT_ENABLE_HTNN_STATUS: "true"
     HTNN_ENABLE_LDS_PLUGIN_VIA_ECDS: "false"
+    ISTIO_DUAL_STACK: "true"
 
   # Settings related to the untaint controller
   # This controller will remove `cni.istio.io/not-ready` from nodes when the istio-cni pod becomes ready