diff --git a/README.md b/README.md
index 9c445b8..eb473c9 100644
--- a/README.md
+++ b/README.md
@@ -23,6 +23,8 @@ Terraform module for KVM/Libvirt Virtual Machine. This module will create a KVM
 | Parameter | Description | Default value
 |-----------------|-----|-----
 |os_img_url|URL to the OS image|https://cloud-images.ubuntu.com/focal/current/focal-server-cloudimg-amd64.img
+|base_pool_name|When defined it will be used in combination with `base_volume_name` to create root volume as linked clone from this pool name|null
+|base_volume_name|When defined it will be used in combination with `base_pool_name` to create root volume as linked clone from this pool/vol name. Defining this variable will disable downloading `os_img_url` and creating a base volume| null
 |autostart| Autostart the Domain| true
 |vm_count|Number of VMs| 1
 |index_start|From where the index start| 1
@@ -43,10 +45,10 @@ Terraform module for KVM/Libvirt Virtual Machine. This module will create a KVM
 |ip_gateway|Static IP addresses of a gateway|192.168.123.1
 |ssh_admin|Admin user with ssh access|ssh-admin
 |ssh_keys|List of public ssh keys| []
-|local_admin|Admin user without ssh access|local-admin
+|local_admin|Admin user without ssh access|""
 |local_admin_passwd|Local admin user password|password_example
 |time_zone|Time Zone|UTC
-|ssh_private_key|Private key for SSH connection test|~/.ssh/id_ed25519
+|ssh_private_key|Private key for SSH connection test|null
 
 ## Example
 
diff --git a/main.tf b/main.tf
index f7b1833..2983853 100644
--- a/main.tf
+++ b/main.tf
@@ -66,12 +66,11 @@ resource "libvirt_domain" "virt-machine" {
       "echo \"Virtual Machine \"$(hostname)\" is UP!\"",
       "date"
     ]
-
     connection {
       type                = "ssh"
       user                = var.ssh_admin
       host                = self.network_interface.0.addresses.0
-      private_key         = file(var.ssh_private_key)
+      private_key         = var.ssh_private_key != null ? file(var.ssh_private_key): null
       timeout             = "2m"
     }
   }
diff --git a/storage.tf b/storage.tf
index 4ff45a1..4725b1a 100644
--- a/storage.tf
+++ b/storage.tf
@@ -1,4 +1,5 @@
 resource "libvirt_volume" "base-volume-qcow2" {
+  count = var.base_volume_name != null ? 0 : 1
   name   = format("${var.vm_hostname_prefix}-base.qcow2")
   pool   = var.pool
   source = var.os_img_url
@@ -10,7 +11,10 @@ resource "libvirt_volume" "volume-qcow2" {
   name   = format("${var.vm_hostname_prefix}%02d.qcow2", count.index + var.index_start)
   pool   = var.pool
   size   = 1024*1024*1024*var.system_volume
-  base_volume_id = libvirt_volume.base-volume-qcow2.id
+  base_volume_id = var.base_volume_name != null ? null : element(libvirt_volume.base-volume-qcow2, 0).id
+  base_volume_name = var.base_volume_name
+  base_volume_pool = var.base_pool_name
+
   format = "qcow2"
 }
 
@@ -20,4 +24,4 @@ resource "libvirt_cloudinit_disk" "commoninit" {
   user_data      = data.template_cloudinit_config.init_config[count.index].rendered
   network_config = data.template_file.network_config[count.index].rendered
   pool           = var.pool
-}
\ No newline at end of file
+}
diff --git a/templates/cloud_init.tpl b/templates/cloud_init.tpl
index 86d74b7..3c48ed6 100644
--- a/templates/cloud_init.tpl
+++ b/templates/cloud_init.tpl
@@ -22,12 +22,14 @@ users:
     system: False
     ssh_authorized_keys: ${ssh_keys}
     shell: /bin/bash
+%{ if local_admin != "" }
   - name: ${local_admin}
     gecos: Local admin (no SSH)
     lock-passwd: false
     sudo: ALL=(ALL) ALL
     passwd: ${local_admin_passwd}
     shell: /bin/bash
+%{ endif }
 
 write_files:
   - path: /etc/ssh/sshd_config
diff --git a/variables.tf b/variables.tf
index 69c0efd..555ce40 100644
--- a/variables.tf
+++ b/variables.tf
@@ -3,6 +3,17 @@ variable "os_img_url" {
   default     = "https://cloud-images.ubuntu.com/focal/current/focal-server-cloudimg-amd64.img"
 }
 
+variable "base_volume_name" {
+  description = "Name of base OS image"
+  default     = null
+}
+
+variable "base_pool_name" {
+  description = "Name of base OS image"
+  default     = null
+}
+
+
 variable "autostart" {
   description = "Autostart the domain"
   default = true
@@ -111,7 +122,7 @@ variable "ssh_keys" {
 
 variable "local_admin" {
   description = "Admin user without ssh access"
-  default     = "local-admin"
+  default     = ""
 }
 
 variable "local_admin_passwd" {
@@ -126,5 +137,5 @@ variable "time_zone" {
 
 variable "ssh_private_key" {
   description = "Private key for SSH connection test"
-  default     = "~/.ssh/id_ed25519"
+  default     = null
 }