Fix setup for flatcar

Reviewed-on: #2

ansible-kvm-vms/README.md

@@ -5,7 +5,9 @@ This project provides an Ansible-based framework to automatically provision virt
 ## 🚀 Features
 
 - **Automated Host Setup**: Installs and configures `libvirt`, `qemu-kvm`, and `libguestfs-tools`.
-- **Ignition Support**: Generates and injects Ignition configuration for all supported OSs via the `fw_cfg` QEMU feature.
+- **Immutable OS Support**: Handles the specific boot-time configuration requirements for:
+  - **CoreOS/Flatcar**: Generates and injects Ignition JSON configurations.
+  - **MicroOS**: Generates and injects Cloud-init user-data.
 - **Custom User Provisioning**: Automatically creates a default user with a hashed password and injects your SSH public key.
 - **Modular Design**: Uses Ansible roles for host preparation, configuration generation, and VM provisioning.
 
@@ -20,7 +22,7 @@ ansible-kvm-vms/
 │   └── vms.yml              # List of VMs to create with CPU, RAM, and Disk specs
 ├── roles/
 │   ├── kvm_host_setup/      # Installs virtualization dependencies on the host
-│   ├── os_config/           # Generates Ignition configuration files
+│   ├── os_config/           # Generates Ignition/Cloud-init config files
 │   └── vm_provision/        # Downloads images and creates VMs via virt-install
 └── playbooks/
     └── create_vms.yml       # Main orchestration playbook
@@ -65,8 +67,9 @@ Edit `vars/vms.yml` to add or modify the VMs you wish to deploy. You can specify
 ## 🔍 How it Works
 
 Since immutable OSs do not use traditional installers, this setup uses a "seed" approach:
-1. **Config Generation**: The `os_config` role creates a JSON Ignition configuration file based on your variables.
+1. **Config Generation**: The `os_config` role creates a JSON (Ignition) or YAML (Cloud-init) file based on your variables.
-2. **Deployment**: `virt-install` is used to create the VM with UEFI boot. The `--sysinfo` flag is used to provide the Ignition config via the `fw_cfg` device, which the immutable OSs (CoreOS, Flatcar, MicroOS) process at first boot.
+2. **Image Customization**: The `vm_provision` role downloads the official `.qcow2` cloud image and uses `virt-customize` (from `libguestfs-tools`) to inject the configuration directly into the disk image before the VM is started.
+3. **Deployment**: `virt-install` is used to create the VM with UEFI boot and the customized disk.
 
 ## 🌐 Accessing your VMs
 

ansible-kvm-vms/cleanup_vms.sh

@@ -0,0 +1,24 @@
+#!/bin/bash
+
+# VM names from vars/vms.yml
+VMS=("coreos-vm" "flatcar-vm" "microos-vm")
+# Image directory from group_vars/all.yml
+IMAGES_DIR="/var/lib/libvirt/images"
+
+for vm in "${VMS[@]}"; do
+    echo "Cleaning up VM: $vm"
+    
+    # Destroy the VM (force stop)
+    sudo virsh destroy "$vm" 2>/dev/null || echo "VM $vm is not running."
+    
+    # Undefine the VM (remove configuration)
+    sudo virsh undefine "$vm" 2>/dev/null || echo "VM $vm is not defined."
+    
+    # Remove the disk image
+    sudo rm -f "$IMAGES_DIR/$vm.qcow2"
+    sudo rm -f "$IMAGES_DIR/$vm.download"
+    
+    echo "VM $vm cleaned up."
+done
+
+echo "Cleanup complete."

ansible-kvm-vms/group_vars/all.yml

@@ -7,7 +7,7 @@ vm_ssh_public_key: "~/.ssh/id_vms.pub" # Path to your public key for SSH access
 # Default VM resources
 default_cpu: 2
 default_ram: 2048
-default_disk: "20G"
+default_disk: 20 # GB
 
 # Storage path for images
 vm_images_dir: "/var/lib/libvirt/images"

ansible-kvm-vms/playbooks/create_vms.yml

@@ -27,6 +27,4 @@
         cpu: "{{ item.cpu }}"
         ram: "{{ item.ram }}"
         disk: "{{ item.disk }}"
-        disk_bus: "{{ item.disk_bus }}"
       loop: "{{ vms }}"
-

ansible-kvm-vms/roles/os_config/tasks/main.yml

@@ -1,6 +1,18 @@
 ---
-- name: Generate Ignition config
+
+- name: Generate Ignition configuration for CoreOS/Flatcar
   template:
     src: ignition.json.j2
-    dest: "/tmp/{{ vm_name }}.ign"
+    dest: "{{ vm_images_dir }}/{{ vm_name }}.ign"
+  when: os_type == 'coreos' or os_type == 'flatcar'
 
+- name: Generate Cloud-init configuration for MicroOS
+  template:
+    src: user-data.yaml.j2
+    dest: "{{ vm_images_dir }}/{{ vm_name }}_user-data"
+  when: os_type == 'microos'
+
+- 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"

ansible-kvm-vms/roles/os_config/templates/ignition.json.j2

@@ -1,13 +1,14 @@
 {
   "ignition": {
-    "version": "3.0.0"
+    "version": "3.4.0"
   },
   "passwd": {
     "users": [
       {
         "name": "{{ vm_user }}",
+        "passwordHash": "{{ vm_password | password_hash('sha512') }}",
         "sshAuthorizedKeys": [
-          "{{ lookup('file', vm_ssh_public_key | replace('~', lookup('env', 'HOME'))) }}"
+          "{{ lookup('file', vm_ssh_public_key) | trim }}"
         ]
       }
     ]

ansible-kvm-vms/roles/os_config/templates/user-data-coreos.yaml.j2

@@ -1,11 +0,0 @@
-#cloud-config
-users:
-  - name: {{ vm_user }}
-    passwd: {{ vm_password | password_hash('sha512') }}
-    ssh_authorized_keys:
-      - {{ lookup('file', vm_ssh_public_key | replace('~', lookup('env', 'HOME'))) }}
-    sudo: ALL=(ALL) NOPASSWD:ALL
-write_files:
-  - path: /etc/ssh/sshd_config.d/permit_root_login.conf
-    content: |
-      PermitRootLogin yes

ansible-kvm-vms/roles/os_config/templates/user-data.yaml.j2

@@ -1,7 +1,19 @@
 #cloud-config
 users:
   - name: {{ vm_user }}
-    sudo: ALL=(ALL) NOPASSWD:ALL
+    passwd: {{ vm_password | password_hash('sha512') }}
     ssh_authorized_keys:
-      - {{ lookup('file', vm_ssh_public_key | replace('~', lookup('env', 'HOME'))) }}
+      - {{ lookup('file', vm_ssh_public_key) | trim }}
+    sudo: ALL=(ALL) NOPASSWD:ALL
     lock_passwd: false
+  - name: root
+    passwd: {{ vm_password | password_hash('sha512') }}
+    sudo: ALL=(ALL) NOPASSWD:ALL
+    lock_passwd: false
+
+runcmd:
+  - mkdir -p /etc/ssh/sshd_config.d
+  - echo "PermitRootLogin yes" > /etc/ssh/sshd_config.d/permit_root_login.conf
+  - systemctl restart sshd
+
+

ansible-kvm-vms/roles/vm_provision/tasks/main.yml

@@ -1,10 +1,9 @@
 ---
-
 - name: Define image URLs
   set_fact:
     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_uefi_image.img"
+      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"
 
 - name: Verify internet connectivity
@@ -23,50 +22,66 @@
 - name: Handle compressed or raw images
   shell: |
     DOWNLOAD_FILE="{{ vm_images_dir }}/{{ vm_name }}.download"
-    FINAL_FILE="{{ vm_images_dir }}/{{ vm_name }}.qcow2"
+    FINAL_FILE="{{ vm_images_dir }}/{{ vm_name }}"
     
     # 1. Handle XZ compression
     if [[ "{{ os_images[os_type] }}" == *.xz ]]; then
       echo "Decompressing XZ image..."
-      unxz -c "$DOWNLOAD_FILE" > "$FINAL_FILE"
+      unxz -c "$DOWNLOAD_FILE" > "$FINAL_FILE".qcow2
     elif [[ "{{ os_images[os_type] }}" == *.img ]]; then
-      echo "Converting RAW image to QCOW2..."
+      echo "Moving IMG image to final destination..."
-      qemu-img convert -f raw -O qcow2 "$DOWNLOAD_FILE" "$FINAL_FILE"
+      mv "$DOWNLOAD_FILE" "$FINAL_FILE".img
     else
       echo "Moving QCOW2 image to final destination..."
-      mv "$DOWNLOAD_FILE" "$FINAL_FILE"
+      mv "$DOWNLOAD_FILE" "$FINAL_FILE".qcow2
     fi
     rm -f "$DOWNLOAD_FILE"
   become: yes
   args:
     creates: "{{ vm_images_dir }}/{{ vm_name }}.qcow2"
 
-- name: Debug Provisioning Vars
-  debug:
-    msg: "Provisioning {{ vm_name }} with disk_bus={{ disk_bus | default('virtio') }} and os_variant={{ os_variant }}"
-
-- name: Remove existing VM definition
-  shell: |
-    virsh destroy {{ vm_name }} || true
-    virsh undefine {{ vm_name }} --nvram || true
-    rm -f /etc/libvirt/qemu/{{ vm_name }}.xml
-  become: yes
-
 - name: Provision VM using virt-install
   shell: |
+    {% if os_type == 'coreos' %}
+    virt-install \
+    --connect qemu:///system \
+    --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 \
+    --os-variant {{ os_variant }} \
+    --network network=default \
+    --graphics none \
+    --noautoconsole \
+    --boot uefi \
+    --sysinfo type=fwcfg,entry0.name=opt/com.coreos/config,entry0.file={{ vm_images_dir }}/{{ vm_name }}.ign
+    {% elif os_type == 'flatcar' %}
+    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 }}.img,format=qcow2,bus=virtio \
+    --import \
+    --os-variant {{ os_variant }} \
+    --network network=default \
+    --graphics none \
+    --noautoconsole \
+    --sysinfo system.serial=flatcar.first_boot=1 \
+    --qemu-commandline="-fw_cfg name=opt/org.flatcar-linux/config,file=/{{ vm_images_dir }}/{{ vm_name }}.ign"
+    {% elif os_type == 'microos' %}
     virt-install \
     --name {{ vm_name }} \
     --vcpus {{ cpu | default(default_cpu) }} \
     --memory {{ ram | default(default_ram) }} \
-    --machine q35 \
+    --disk path={{ vm_images_dir }}/{{ vm_name }}.qcow2,bus=virtio \
-    --disk path={{ vm_images_dir }}/{{ vm_name }}.qcow2,bus={{ disk_bus | default('virtio') }} \
     --import \
     --os-variant {{ os_variant }} \
     --network network=default \
     --graphics none \
     --noautoconsole \
     --boot uefi \
-    --sysinfo type=fwcfg,entry0.name="opt/com.coreos/config",entry0.file="/tmp/{{ vm_name }}.ign"
+    --cloud-init user-data={{ vm_images_dir }}/{{ vm_name }}_user-data,meta-data={{ vm_images_dir }}/{{ vm_name }}_meta-data
+    {% endif %}
   args:
     creates: "/etc/libvirt/qemu/{{ vm_name }}.xml"
-  become: yes

ansible-kvm-vms/vars/vms.yml

@@ -3,23 +3,20 @@ vms:
   - name: coreos-vm
     os_type: coreos
     os_variant: "fedora-coreos-stable"
-    disk_bus: "virtio"
     cpu: 2
     ram: 2048
-    disk: "20G"
+    disk: 20 # GB
 
   - name: flatcar-vm
     os_type: flatcar
     os_variant: "fedora-coreos-stable"
-    disk_bus: "virtio"
     cpu: 2
     ram: 2048
-    disk: "20G"
+    disk: 20 # GB
 
   - name: microos-vm
     os_type: microos
-    os_variant: "generic"
+    os_variant: "opensusemicroos"
-    disk_bus: "virtio"
     cpu: 2
     ram: 2048
     disk: "20G"