diff --git a/day01-image/scripts/salt_bootstrap.sh b/day01-image/scripts/salt_bootstrap.sh
index fed903d..54597cc 100644
--- a/day01-image/scripts/salt_bootstrap.sh
+++ b/day01-image/scripts/salt_bootstrap.sh
@@ -1,4 +1,6 @@
 #!/bin/bash -xe
+CLUSTER_NAME=${CLUSTER_NAME:-mcp-day01}
+CLUSTER_MODEL=${CLUSTER_MODEL:-https://github.com/Mirantis/mcp-drivetrain-model.git}
 CLUSTER_MODEL_REF=${CLUSTER_MODEL_REF:-master}
 FORMULA_VERSION=${FORMULA_VERSION:-testing}
 SALTSTACK_GPG=${SALTSTACK_GPG:-"https://repo.saltstack.com/apt/ubuntu/16.04/amd64/2016.3/SALTSTACK-GPG-KEY.pub"}