diff --git a/ansible-kvm-vms/roles/os_config/tasks/main.yml b/ansible-kvm-vms/roles/os_config/tasks/main.yml
index d93853a..9e8565a 100644
--- a/ansible-kvm-vms/roles/os_config/tasks/main.yml
+++ b/ansible-kvm-vms/roles/os_config/tasks/main.yml
@@ -1,18 +1,28 @@
 ---
-
-- name: Generate Ignition configuration for CoreOS/Flatcar
+- name: Generate Butane config for CoreOS
   template:
-    src: ignition.json.j2
-    dest: "{{ vm_images_dir }}/{{ vm_name }}.ign"
-  when: os_type == 'coreos' or os_type == 'flatcar'
+    src: coreos_ignition.bu.j2
+    dest: "/tmp/{{ vm_name }}.bu"
+  when: os_type == 'coreos'
 
-- name: Generate Cloud-init configuration for MicroOS
+- name: Generate Butane config for Flatcar
   template:
-    src: user-data.yaml.j2
-    dest: "{{ vm_images_dir }}/{{ vm_name }}_user-data"
+    src: flatcar_ignition.bu.j2
+    dest: "/tmp/{{ vm_name }}.bu"
+  when: os_type == 'flatcar'
+
+- name: Generate Butane config for microos
+  template:
+    src: microos_ignition.bu.j2
+    dest: "/tmp/{{ vm_name }}.bu"
   when: os_type == 'microos'
 
+- name: Compile Butane to Ignition JSON
+  shell: |
+    docker run --rm -i quay.io/coreos/butane --pretty --strict < /tmp/{{ vm_name }}.bu > {{ vm_images_dir }}/{{ vm_name }}.ign
+  become: yes
+
 - name: Generate dummy meta-data file
   copy:
     content: "instance-id: {{ vm_name }}\nlocal-hostname: {{ vm_name }}\n"
-    dest: "{{ vm_images_dir }}/{{ vm_name }}_meta-data"
+    dest: "{{ vm_images_dir }}/{{ vm_name }}_meta-data"
\ No newline at end of file
diff --git a/ansible-kvm-vms/roles/os_config/templates/coreos_ignition.bu.j2 b/ansible-kvm-vms/roles/os_config/templates/coreos_ignition.bu.j2
new file mode 100644
index 0000000..8f7cb97
--- /dev/null
+++ b/ansible-kvm-vms/roles/os_config/templates/coreos_ignition.bu.j2
@@ -0,0 +1,14 @@
+variant: fcos
+version: 1.5.0
+passwd:
+  users:
+    - name: {{ vm_user }}
+      password_hash: "{{ vm_password | password_hash('sha512') }}"
+      ssh_authorized_keys:
+        - "{{ lookup('file', vm_ssh_public_key) | trim }}"
+storage:
+  files:
+    - path: /etc/ssh/sshd_config.d/permit_root_login.conf
+      mode: 0644
+      contents:
+        inline: PermitRootLogin yes
\ No newline at end of file
diff --git a/ansible-kvm-vms/roles/os_config/templates/flatcar_ignition.bu.j2 b/ansible-kvm-vms/roles/os_config/templates/flatcar_ignition.bu.j2
new file mode 100644
index 0000000..e47b533
--- /dev/null
+++ b/ansible-kvm-vms/roles/os_config/templates/flatcar_ignition.bu.j2
@@ -0,0 +1,14 @@
+variant: fcos
+version: 1.4.0
+passwd:
+  users:
+    - name: {{ vm_user }}
+      password_hash: "{{ vm_password | password_hash('sha512') }}"
+      ssh_authorized_keys:
+        - "{{ lookup('file', vm_ssh_public_key) | trim }}"
+storage:
+  files:
+    - path: /etc/ssh/sshd_config.d/permit_root_login.conf
+      mode: 0644
+      contents:
+        inline: PermitRootLogin yes
diff --git a/ansible-kvm-vms/roles/os_config/templates/ignition.json.j2 b/ansible-kvm-vms/roles/os_config/templates/ignition.json.j2
deleted file mode 100644
index f4189ce..0000000
--- a/ansible-kvm-vms/roles/os_config/templates/ignition.json.j2
+++ /dev/null
@@ -1,16 +0,0 @@
-{
-  "ignition": {
-    "version": "3.4.0"
-  },
-  "passwd": {
-    "users": [
-      {
-        "name": "{{ vm_user }}",
-        "passwordHash": "{{ vm_password | password_hash('sha512') }}",
-        "sshAuthorizedKeys": [
-          "{{ lookup('file', vm_ssh_public_key) | trim }}"
-        ]
-      }
-    ]
-  }
-}
\ No newline at end of file
diff --git a/ansible-kvm-vms/roles/os_config/templates/microos_ignition.bu.j2 b/ansible-kvm-vms/roles/os_config/templates/microos_ignition.bu.j2
new file mode 100644
index 0000000..938fde2
--- /dev/null
+++ b/ansible-kvm-vms/roles/os_config/templates/microos_ignition.bu.j2
@@ -0,0 +1,89 @@
+variant: fcos
+version: 1.5.0
+passwd:
+  users:
+    - name: root
+      password_hash: "{{ vm_password | password_hash('sha512') }}"
+      ssh_authorized_keys:
+        - "{{ lookup('file', vm_ssh_public_key) | trim }}"
+storage:
+  disks:
+    - device: /dev/vdb
+      wipe_table: true
+      partitions:
+        - label: ext-data
+          number: 1
+  filesystems:
+    - device: /dev/vdb1
+      format: btrfs
+      label: ext-pool
+      wipe_filesystem: true
+  files:
+    - path: /etc/ssh/sshd_config.d/permit_root_login.conf
+      mode: 0644
+      contents:
+        inline: PermitRootLogin yes
+systemd:
+  units:
+    # 1. Einmaliger Dienst, der das Subvolume "@home" physisch auf der Platte anlegt
+    - name: create-home-subvolume.service
+      enabled: true
+      contents: |
+        [Unit]
+        Description=Create Btrfs Subvolume for Home (Once)
+        After=local-fs-pre.target
+        Before=home.mount
+
+        [Service]
+        Type=oneshot
+        ExecStartPre=/usr/bin/mkdir -p /run/mnt-ext-init
+        ExecStartPre=/usr/bin/mount LABEL=ext-pool /run/mnt-ext-init
+        # Hier werden die Subvolumes @home angelegt, falls sie nicht existieren
+        ExecStart=/usr/bin/bash -c "for sub in @home; do [ -d /run/mnt-ext-init/\$$sub ] || /usr/sbin/btrfs subvolume create /run/mnt-ext-init/$$sub; done"
+        ExecStartPost=/usr/bin/umount /run/mnt-ext-init
+        ExecStartPost=/usr/bin/rmdir /run/mnt-ext-init
+        RemainAfterExit=true
+
+        [Install]
+        RequiredBy=home.mount
+    # Der Name der Unit MUSS exakt dem Pfad entsprechen (aus /home wird home.mount)
+    - name: home.mount
+      enabled: true
+      contents: |
+        [Unit]
+        Description=Mount Separates Home Laufwerk
+        Before=local-fs.target
+
+        [Mount]
+        What=LABEL=ext-pool
+        Where=/home
+        Type=btrfs
+        Options=defaults,subvol=@home
+
+        [Install]
+        WantedBy=local-fs.target
+    # HIER wird der zusätzliche User sicher angelegt, NACHDEM /home gemountet ist
+    - name: create-custom-users.service
+      enabled: true
+      contents: |
+        [Unit]
+        Description=Create Additional System Users safely after Mounts
+        After=home.mount
+        Requires=home.mount
+        Before=multi-user.target
+
+        [Service]
+        Type=oneshot
+        # Legt den User an, setzt das Home-Verzeichnis, fügt ihn zu wheel (sudo) hinzu und setzt den SSH Key
+        ExecStart=/usr/bin/bash -c "\
+          /usr/sbin/useradd -m -s /bin/bash {{ vm_user }} && \
+          /usr/sbin/usermod -p '{{ vm_password | password_hash('sha512') }}' {{ vm_user }} && \
+          /usr/bin/mkdir -p /home/{{ vm_user }}/.ssh && \
+          /usr/bin/echo '{{ lookup('file', vm_ssh_public_key) | trim }}' > /home/{{ vm_user }}/.ssh/authorized_keys && \
+          /usr/bin/chown -R {{ vm_user }}:{{ vm_user }} /home/{{ vm_user }}/.ssh && \
+          /usr/bin/chmod 700 /home/{{ vm_user }}/.ssh && \
+          /usr/bin/chmod 600 /home/{{ vm_user }}/.ssh/authorized_keys"
+        RemainAfterExit=true
+
+        [Install]
+        WantedBy=multi-user.target
\ No newline at end of file
diff --git a/ansible-kvm-vms/roles/vm_provision/tasks/main.yml b/ansible-kvm-vms/roles/vm_provision/tasks/main.yml
index d31c6c5..f62bc43 100644
--- a/ansible-kvm-vms/roles/vm_provision/tasks/main.yml
+++ b/ansible-kvm-vms/roles/vm_provision/tasks/main.yml
@@ -4,7 +4,7 @@
     os_images:
       coreos: "https://builds.coreos.fedoraproject.org/prod/streams/stable/builds/44.20260510.3.1/x86_64/fedora-coreos-44.20260510.3.1-qemu.x86_64.qcow2.xz"
       flatcar: "https://stable.release.flatcar-linux.net/amd64-usr/current/flatcar_production_qemu_image.img"
-      microos: "https://ftp.halifax.rwth-aachen.de/opensuse/tumbleweed/appliances/openSUSE-MicroOS.x86_64-kvm-and-xen.qcow2"
+      microos: "https://download.opensuse.org/tumbleweed/appliances/openSUSE-MicroOS.x86_64-ContainerHost-kvm-and-xen.qcow2"
 
 - name: Verify internet connectivity
   uri:
@@ -48,7 +48,7 @@
     --name {{ vm_name }} \
     --vcpus {{ cpu | default(default_cpu) }} \
     --memory {{ ram | default(default_ram) }} \
-    --disk size={{ disk | default('10G') }},backing_store={{ vm_images_dir }}/{{ vm_name }}.qcow2,backing_format=qcow2 \
+    --disk size={{ disk | default('10') }},backing_store={{ vm_images_dir }}/{{ vm_name }}.qcow2,backing_format=qcow2,bus=virtio \
     --os-variant {{ os_variant }} \
     --network network=default \
     --graphics none \
@@ -71,17 +71,18 @@
     --qemu-commandline="-fw_cfg name=opt/org.flatcar-linux/config,file=/{{ vm_images_dir }}/{{ vm_name }}.ign"
     {% elif os_type == 'microos' %}
     virt-install \
+    --connect qemu:///system \
     --name {{ vm_name }} \
     --vcpus {{ cpu | default(default_cpu) }} \
     --memory {{ ram | default(default_ram) }} \
-    --disk path={{ vm_images_dir }}/{{ vm_name }}.qcow2,bus=virtio \
-    --import \
+    --disk size={{ disk | default('10') }},backing_store={{ vm_images_dir }}/{{ vm_name }}.qcow2,backing_format=qcow2,bus=virtio \
+    --disk size={{ disk | default('10') }},path={{ vm_images_dir }}/{{ vm_name }}-home.qcow2,bus=virtio \
     --os-variant {{ os_variant }} \
     --network network=default \
     --graphics none \
     --noautoconsole \
     --boot uefi \
-    --cloud-init user-data={{ vm_images_dir }}/{{ vm_name }}_user-data,meta-data={{ vm_images_dir }}/{{ vm_name }}_meta-data
+    --sysinfo type=fwcfg,entry0.name=opt/com.coreos/config,entry0.file={{ vm_images_dir }}/{{ vm_name }}.ign
     {% endif %}
   args:
     creates: "/etc/libvirt/qemu/{{ vm_name }}.xml"
\ No newline at end of file
diff --git a/ansible-kvm-vms/vars/vms.yml b/ansible-kvm-vms/vars/vms.yml
index f3ab098..1848203 100644
--- a/ansible-kvm-vms/vars/vms.yml
+++ b/ansible-kvm-vms/vars/vms.yml
@@ -16,7 +16,7 @@ vms:
 
   - name: microos-vm
     os_type: microos
-    os_variant: "opensusemicroos"
+    os_variant: "opensusetumbleweed"
     cpu: 2
     ram: 2048
-    disk: "20G"
+    disk: 20 #GB