diff --git a/demo/inventory/1-cesnet.yaml b/demo/inventory/1-cesnet.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..9ffc5013cdb949c0318455ca4738d1479066c619
--- /dev/null
+++ b/demo/inventory/1-cesnet.yaml
@@ -0,0 +1,28 @@
+---
+fip:
+  hosts:
+    147.251.124.105:
+
+master:
+  hosts:
+    2001:718:801:432:f816:3eff:fe33:7a22:
+      # must be IPv4 address or hostname
+      kube_server: 192.168.0.231
+
+ingress:
+  hosts:
+    2001:718:801:432:f816:3eff:fece:3b38:
+
+nfs:
+  hosts:
+    2001:718:801:432:f816:3eff:fe97:4bbd:
+
+worker:
+  hosts:
+    2001:718:801:432:f816:3eff:fe82:628a:
+
+# using public IP of kube_server for ansible delegate_to
+kube_server:
+  hosts:
+    192.168.0.231:
+      ansible_host: 2001:718:801:432:f816:3eff:fe33:7a22
diff --git a/demo/terraform/terraform.tfvars b/demo/terraform/terraform.tfvars
index d62bebc54be29c7cd89ef68b8ab70e4b1d7ca368..473e95b6264b6669d7b2b719d2c8e8576850f27a 100644
--- a/demo/terraform/terraform.tfvars
+++ b/demo/terraform/terraform.tfvars
@@ -11,7 +11,7 @@ worker_cpus = 4
 worker_ram  = 8192
 
 # Number of extra workers
-extra_workers = 2
+extra_workers = 1
 
 # volumes for docker
 docker_volumes_size = 384