diff --git a/cluster/Vagrantfile b/cluster/Vagrantfile
index d5c2574..4677c1d 100755
--- a/cluster/Vagrantfile
+++ b/cluster/Vagrantfile
@@ -30,7 +30,7 @@ node_os = ENV['CONTIV_NODE_OS'] || CENTOS
 k8s_ver = ENV['CONTIV_K8S_VERSION'] || DEFAULT_K8S_VERSION
 orc_path = case k8s_ver
            when /^v1\.[45]\./ then 'k8s1.4/'
-           when /^v1\.6\./    then 'k8s1.6/'
+           when /^v1\.[67]\./ then 'k8s1.6/'
            else
              raise "unsupported k8s version: #{k8s_ver}"
            end
@@ -40,7 +40,6 @@ orchestrators = [ORC_LEGACY_SWARM, ORC_SWARM, ORC_KUBEADM]
 
 # method to create an etc_hosts file based on the cluster info
 def create_etc_hosts(node_names, node_ips, o)
-  master_ip = node_ips[0]
   hosts = "127.0.0.1   localhost\n"
 
   node_names.zip(node_ips).each do |node, ip|