diff --git a/classes/cluster/k8s-aio-calico/.env b/classes/cluster/k8s-aio-calico/.env
new file mode 100644
index 0000000..407e2d1
--- /dev/null
+++ b/classes/cluster/k8s-aio-calico/.env
@@ -0,0 +1 @@
+EXTRA_FORMULAS="ntp"
diff --git a/classes/cluster/k8s-aio-contrail/.env b/classes/cluster/k8s-aio-contrail/.env
new file mode 100644
index 0000000..407e2d1
--- /dev/null
+++ b/classes/cluster/k8s-aio-contrail/.env
@@ -0,0 +1 @@
+EXTRA_FORMULAS="ntp"
diff --git a/classes/cluster/k8s-ha-calico-cloudprovider/.env b/classes/cluster/k8s-ha-calico-cloudprovider/.env
new file mode 100644
index 0000000..407e2d1
--- /dev/null
+++ b/classes/cluster/k8s-ha-calico-cloudprovider/.env
@@ -0,0 +1 @@
+EXTRA_FORMULAS="ntp"
diff --git a/classes/cluster/k8s-ha-calico-syndic/.env b/classes/cluster/k8s-ha-calico-syndic/.env
new file mode 100644
index 0000000..407e2d1
--- /dev/null
+++ b/classes/cluster/k8s-ha-calico-syndic/.env
@@ -0,0 +1 @@
+EXTRA_FORMULAS="ntp"
diff --git a/classes/cluster/k8s-ha-calico/.env b/classes/cluster/k8s-ha-calico/.env
new file mode 100644
index 0000000..407e2d1
--- /dev/null
+++ b/classes/cluster/k8s-ha-calico/.env
@@ -0,0 +1 @@
+EXTRA_FORMULAS="ntp"
diff --git a/classes/cluster/k8s-ha-contrail/.env b/classes/cluster/k8s-ha-contrail/.env
new file mode 100644
index 0000000..407e2d1
--- /dev/null
+++ b/classes/cluster/k8s-ha-contrail/.env
@@ -0,0 +1 @@
+EXTRA_FORMULAS="ntp"