diff --git a/proxmox/terraform/modules/node/main.tf b/proxmox/terraform/modules/node/main.tf
--- a/proxmox/terraform/modules/node/main.tf
+++ b/proxmox/terraform/modules/node/main.tf
@@ -89,7 +89,9 @@
         "sed -i 's/127.0.1.1/${lookup(var.networks[0], "ip")}/g' /etc/hosts",
         # so puppet agent installs the node's role
         "puppet agent --server ${var.config["puppet_master"]} --environment=${var.config["puppet_environment"]} --waitforcert 60 --test || echo 'Node provisionned!'",
-      ])
+      ],
+      var.post_provision_steps,
+      )
 
     connection {
       type        = "ssh"
diff --git a/proxmox/terraform/modules/node/variables.tf b/proxmox/terraform/modules/node/variables.tf
--- a/proxmox/terraform/modules/node/variables.tf
+++ b/proxmox/terraform/modules/node/variables.tf
@@ -54,7 +54,7 @@
     id      = number
     ip      = string
     gateway = string
-    macaddr = string
+    macaddr = optional(string)
     bridge  = string
   }))
   default = []
@@ -102,7 +102,13 @@
 }
 
 variable "pre_provision_steps" {
-  description = "List of sequential provisioning steps to apply"
+  description = "Sequential provisioning steps to apply *before* common provision steps"
+  type        = list(string)
+  default     = []
+}
+
+variable "post_provision_steps" {
+  description = "Sequential provisioning steps to apply *after* common provision steps"
   type        = list(string)
   default     = []
 }
diff --git a/proxmox/terraform/staging/rancher.tf b/proxmox/terraform/staging/rancher.tf
--- a/proxmox/terraform/staging/rancher.tf
+++ b/proxmox/terraform/staging/rancher.tf
@@ -39,5 +39,42 @@
 }
 
 output "rancher2_cluster_command" {
+  sensitive = true
   value = rancher2_cluster.staging-workers.cluster_registration_token[0].node_command
 }
+
+module "elastic-worker0" {
+  source      = "../modules/node"
+  template    = "debian-bullseye-11.3-zfs-2022-04-21"
+  config      = local.config
+  hostname    = "elastic-worker0"
+  description = "elastic worker running in rancher cluster"
+  hypervisor  = "uffizi"
+  sockets     = "1"
+  cores       = "4"
+  onboot      = true
+  memory  = "4096"
+  balloon = "1024"
+
+  networks = [{
+    id      = 0
+    ip      = "192.168.130.130"
+    gateway = local.config["gateway_ip"]
+    bridge  = "vmbr443"
+  }]
+
+  storages = [{
+    storage = "proxmox"
+    size    = "50G"
+    }
+  ]
+
+  # Let the node registered itself to the cluster rancher
+  post_provision_steps = [
+    rancher2_cluster.staging-workers.cluster_registration_token[0].node_command
+  ]
+}
+
+output "elastic-worker0_summary" {
+  value = module.elastic-worker0.summary
+}
diff --git a/proxmox/terraform/versions.tf b/proxmox/terraform/versions.tf
--- a/proxmox/terraform/versions.tf
+++ b/proxmox/terraform/versions.tf
@@ -1,5 +1,6 @@
 terraform {
   required_version = ">= 0.13"
+  experiments      = [module_variable_optional_attrs]
   required_providers {
     proxmox = {
       source = "telmate/proxmox"
@@ -16,7 +17,7 @@
   pm_tls_insecure = true
   pm_api_url      = "https://beaubourg.internal.softwareheritage.org:8006/api2/json"
   # in a shell (see README): source ../setup.sh
-  
+
   # Uncomment this section to activate the proxmox execution logs
   # pm_log_enable = true
   # pm_log_file = "terraform-plugin-proxmox.log"