diff --git a/variables.tf b/variables.tf
new file mode 100644
index 0000000..012b32a
--- /dev/null
+++ b/variables.tf
@@ -0,0 +1,6 @@
+# Number of worker nodes in out kubernetes cluster.
+variable "kubesize" {
+  type    = number
+  default = 3
+}
+