Check if user has a correct cluster-cidr and service-cidr config

Signed-off-by: Manuel Buil <mbuil@suse.com>

pkg/agent/run.go

@@ -61,8 +61,14 @@ func run(ctx context.Context, cfg cmds.Agent, proxy proxy.Proxy) error {
 	}
 	serviceIPv6 := utilsnet.IsIPv6CIDR(nodeConfig.AgentConfig.ServiceCIDR)
 	clusterIPv6 := utilsnet.IsIPv6CIDR(nodeConfig.AgentConfig.ClusterCIDR)
-
-	enableIPv6 := dualCluster || dualService || dualNode || serviceIPv6 || clusterIPv6
+	nodeIPv6 := utilsnet.IsIPv6String(nodeConfig.AgentConfig.NodeIP)
+	if (serviceIPv6 != clusterIPv6) || (dualCluster != dualService) {
+		return errors.New("cluster-cidr and service-cidr must share the same IP version (IPv4, IPv6 or dual-stack)")
+	}
+	if (clusterIPv6 != nodeIPv6) || (dualCluster != dualNode) {
+		return errors.New("cluster-cidr and node-ip must share the same IP version (IPv4, IPv6 or dual-stack)")
+	}
+	enableIPv6 := dualCluster || clusterIPv6
 	conntrackConfig, err := getConntrackConfig(nodeConfig)
 	if err != nil {
 		return errors.Wrap(err, "failed to validate kube-proxy conntrack configuration")