diff --git a/inventory/example/group_vars/all/all.yml b/inventory/example/group_vars/all/all.yml
new file mode 100644
index 0000000..5e8349a
--- /dev/null
+++ b/inventory/example/group_vars/all/all.yml
@@ -0,0 +1,78 @@
+---
+bootstrap_python: false
+# Install portable python distribution that do not provide python (eg.
+# coreos/flatcar):
+# bootstrap_python: true
+# ansible_python_interpreter: /opt/bin/python
+
+ansible_ssh_user: ubuntu
+
+ansible_ssh_common_args: '-o StrictHostKeyChecking=no'
+# To use a bastion host between node and ansible use:
+# ansible_ssh_common_args: '-o StrictHostKeyChecking=no -o ProxyCommand="ssh -o StrictHostKeyChecking=no -W %h:%p -q ubuntu@{{ ansible_ssh_bastion_host }}"'
+# ansible_ssh_bastion_host: __BASTION_IP__
+
+kubeadm_version: v1.19.3
+kubernetes_version: v1.19.3
+# If deploying HA clusters, specify the loadbalancer IP or domain name and port
+# in front of the control plane nodes:
+# kubernetes_api_server_address: __LB_HOSTNAME__
+# kubernetes_api_server_port: __LB_LISTENER_PORT__
+
+bin_dir: /usr/local/bin
+# Change default path for custom binary. On OS with immutable file system (eg.
+# coreos/flatcar) use a writable path
+# bin_dir: /opt/bin
+
+cni_plugin: "calico"
+
+# Customize API server
+kubeadm_api_server_extra_args: {}
+kubeadm_api_server_extra_volumes: {}
+
+# Customize controller manager scheduler
+# eg. to publish prometheus metrics on "0.0.0.0":
+# kubeadm_controller_manager_extra_args: |
+#   address: 0.0.0.0
+kubeadm_controller_manager_extra_args: {}
+kubeadm_controller_manager_extra_volumes: {}
+
+# Customize scheduler manager scheduler
+# eg. to publish prometheus metrics on "0.0.0.0":
+# kubeadm_scheduler_extra_args: |
+#   address: 0.0.0.0
+kubeadm_scheduler_extra_volumes: {}
+kubeadm_scheduler_extra_args: {}
+
+# Customize Kubelet
+# `kubeadm_kubelet_extra_args` is to be used as a last resort,
+# `kubeadm_kubelet_component_config` configure kubelet wth native kubeadm API,
+# please see
+# https://kubernetes.io/docs/tasks/administer-cluster/kubelet-config-file/ for
+# more information
+kubeadm_kubelet_component_config: {}
+kubeadm_kubelet_extra_args: {}
+
+
+# Customize Kube Proxy configuration using native Kubeadm API
+# eg. to publish prometheus metrics on "0.0.0.0":
+# kubeadm_kube_proxy_component_config: |
+#   metricsBindAddress: 0.0.0.0
+kubeadm_kube_proxy_component_config: {}
+
+# Additionnal subject alternative names for the API server
+# eg. to add aditionnals domains:
+# kubeadm_api_server_cert_extra_sans: |
+#   - mydomain.example.com
+kubeadm_api_server_cert_extra_sans: {}
+
+kubeadm_cluster_name: symplegma
+
+# Enable systemd cgroup for Kubelet and container runtime
+# DO NOT CHANGE this on an existing cluster: Changing the cgroup driver of a
+# Node that has joined a cluster is strongly not recommended. If the kubelet
+# has created Pods using the semantics of one cgroup driver, changing the
+# container runtime to another cgroup driver can cause errors when trying to
+# re-create the Pod sandbox for such existing Pods. Restarting the kubelet may
+# not solve such errors. Default is to use cgroupfs.
+# systemd_cgroup: true
diff --git a/inventory/sample-coreos-bastion/host_vars/.placeholder b/inventory/example/host_vars/.placeholder
similarity index 100%
rename from inventory/sample-coreos-bastion/host_vars/.placeholder
rename to inventory/example/host_vars/.placeholder
diff --git a/inventory/sample-coreos-bastion/group_vars/all/all.yml b/inventory/sample-coreos-bastion/group_vars/all/all.yml
deleted file mode 100644
index fd2891c..0000000
--- a/inventory/sample-coreos-bastion/group_vars/all/all.yml
+++ /dev/null
@@ -1,27 +0,0 @@
----
-bootstrap_python: true
-ansible_ssh_user: core
-ansible_python_interpreter: /opt/bin/python
-ansible_ssh_common_args: '-o StrictHostKeyChecking=no -o ProxyCommand="ssh -o StrictHostKeyChecking=no -W %h:%p -q ubuntu@{{ ansible_ssh_bastion_host }}"'
-ansible_ssh_bastion_host: __BASTION_IP__
-
-kubeadm_version: v1.15.0
-kubernetes_version: v1.15.0
-# kubernetes_api_server_address: __NLB_HOSTNAME__
-# kubernetes_api_server_port: __NLB_LISTENER_PORT__
-
-bin_dir: /opt/bin
-
-cni_plugin: "calico"
-
-kubeadm_api_server_extra_args: {}
-kubeadm_controller_manager_extra_args: {}
-kubeadm_scheduler_extra_args: {}
-kubeadm_api_server_extra_volumes: {}
-kubeadm_controller_manager_extra_volumes: {}
-kubeadm_scheduler_extra_volumes: {}
-kubeadm_kubelet_extra_args: {}
-
-kubeadm_api_server_cert_extra_sans: {}
-
-kubeadm_cluster_name: symplegma
diff --git a/inventory/sample-coreos/group_vars/all/all.yml b/inventory/sample-coreos/group_vars/all/all.yml
deleted file mode 100644
index b7ddb0b..0000000
--- a/inventory/sample-coreos/group_vars/all/all.yml
+++ /dev/null
@@ -1,26 +0,0 @@
----
-bootstrap_python: true
-ansible_ssh_user: core
-ansible_python_interpreter: /opt/bin/python
-ansible_ssh_common_args: '-o StrictHostKeyChecking=no'
-
-kubeadm_version: v1.15.0
-kubernetes_version: v1.15.0
-# kubernetes_api_server_address: __NLB_HOSTNAME__
-# kubernetes_api_server_port: __NLB_LISTENER_PORT__
-
-bin_dir: /opt/bin
-
-cni_plugin: "calico"
-
-kubeadm_api_server_extra_args: {}
-kubeadm_controller_manager_extra_args: {}
-kubeadm_scheduler_extra_args: {}
-kubeadm_api_server_extra_volumes: {}
-kubeadm_controller_manager_extra_volumes: {}
-kubeadm_scheduler_extra_volumes: {}
-kubeadm_kubelet_extra_args: {}
-
-kubeadm_api_server_cert_extra_sans: {}
-
-kubeadm_cluster_name: symplegma
diff --git a/inventory/sample-coreos/host_vars/.placeholder b/inventory/sample-coreos/host_vars/.placeholder
deleted file mode 100644
index 6e4754f..0000000
--- a/inventory/sample-coreos/host_vars/.placeholder
+++ /dev/null
@@ -1 +0,0 @@
-YOLO
diff --git a/inventory/sample-ubuntu-bastion/group_vars/all/all.yml b/inventory/sample-ubuntu-bastion/group_vars/all/all.yml
deleted file mode 100644
index 99d30e6..0000000
--- a/inventory/sample-ubuntu-bastion/group_vars/all/all.yml
+++ /dev/null
@@ -1,26 +0,0 @@
----
-bootstrap_python: false
-ansible_ssh_user: ubuntu
-ansible_ssh_common_args: '-o StrictHostKeyChecking=no -o ProxyCommand="ssh -o StrictHostKeyChecking=no -W %h:%p -q ubuntu@{{ ansible_ssh_bastion_host }}"'
-ansible_ssh_bastion_host: __BASTION_IP__
-
-kubeadm_version: v1.15.0
-kubernetes_version: v1.15.0
-# kubernetes_api_server_address: __NLB_HOSTNAME__
-# kubernetes_api_server_port: __NLB_LISTENER_PORT__
-
-bin_dir: /usr/local/bin
-
-cni_plugin: "calico"
-
-kubeadm_api_server_extra_args: {}
-kubeadm_controller_manager_extra_args: {}
-kubeadm_scheduler_extra_args: {}
-kubeadm_api_server_extra_volumes: {}
-kubeadm_controller_manager_extra_volumes: {}
-kubeadm_scheduler_extra_volumes: {}
-kubeadm_kubelet_extra_args: {}
-
-kubeadm_api_server_cert_extra_sans: {}
-
-kubeadm_cluster_name: symplegma
diff --git a/inventory/sample-ubuntu-bastion/host_vars/.placeholder b/inventory/sample-ubuntu-bastion/host_vars/.placeholder
deleted file mode 100644
index 6e4754f..0000000
--- a/inventory/sample-ubuntu-bastion/host_vars/.placeholder
+++ /dev/null
@@ -1 +0,0 @@
-YOLO
diff --git a/inventory/sample-ubuntu/group_vars/all/all.yml b/inventory/sample-ubuntu/group_vars/all/all.yml
deleted file mode 100644
index b837a83..0000000
--- a/inventory/sample-ubuntu/group_vars/all/all.yml
+++ /dev/null
@@ -1,25 +0,0 @@
----
-bootstrap_python: false
-ansible_ssh_user: ubuntu
-ansible_ssh_common_args: '-o StrictHostKeyChecking=no'
-
-kubeadm_version: v1.15.0
-kubernetes_version: v1.15.0
-# kubernetes_api_server_address: __NLB_HOSTNAME__
-# kubernetes_api_server_port: __NLB_LISTENER_PORT__
-
-bin_dir: /usr/local/bin
-
-cni_plugin: "calico"
-
-kubeadm_api_server_extra_args: {}
-kubeadm_controller_manager_extra_args: {}
-kubeadm_scheduler_extra_args: {}
-kubeadm_api_server_extra_volumes: {}
-kubeadm_controller_manager_extra_volumes: {}
-kubeadm_scheduler_extra_volumes: {}
-kubeadm_kubelet_extra_args: {}
-
-kubeadm_api_server_cert_extra_sans: {}
-
-kubeadm_cluster_name: symplegma
diff --git a/inventory/sample-ubuntu/host_vars/.placeholder b/inventory/sample-ubuntu/host_vars/.placeholder
deleted file mode 100644
index 6e4754f..0000000
--- a/inventory/sample-ubuntu/host_vars/.placeholder
+++ /dev/null
@@ -1 +0,0 @@
-YOLO