diff --git a/projects/kubernetes/boot.sh b/projects/kubernetes/boot.sh
index 8c1dfc053..57acfccfa 100755
--- a/projects/kubernetes/boot.sh
+++ b/projects/kubernetes/boot.sh
@@ -1,4 +1,8 @@
 #!/bin/bash -eu
+: ${KUBE_PORT_BASE:=2222}
+: ${KUBE_VCPUS:=2}
+: ${KUBE_MEM:=4096}
+: ${KUBE_DISK:=4G}
 : ${KUBE_RUN_ARGS:=}
 if [ $# -eq 0 ] ; then
     img="kube-master"
@@ -31,4 +35,4 @@ else
 fi
 set -x
 rm -rf "${state}"
-../../bin/linuxkit run ${KUBE_RUN_ARGS} -cpus 2 -mem 4096 -state "${state}" -disk size=4G -data "${data}" "${img}"
+../../bin/linuxkit run ${KUBE_RUN_ARGS} -cpus ${KUBE_VCPUS} -mem ${KUBE_MEM} -state "${state}" -disk size=${KUBE_DISK} -data "${data}" "${img}"