12 Commits

Author SHA1 Message Date
andreas add0a7f2c2 Multiple attempted fixes 2026-06-10 23:15:40 +02:00
andreas e40d91eb16 Add debug message 2026-06-10 22:58:54 +02:00
andreas f6a3273e08 Pass disk bus variable 2026-06-10 22:48:47 +02:00
andreas 83edc85654 REVERT AFTER DEBUG! Force recreating VMs 2026-06-10 22:42:25 +02:00
andreas 78695e9f1d Try different disk setup 2026-06-10 22:06:57 +02:00
andreas 71c67cb81a Change from cloud init to ignition 2026-06-10 19:26:28 +02:00
andreas f2c6da73df Syntax error fix 2026-06-10 18:47:41 +02:00
andreas fdd7ca8016 Change back to cloud init 2026-06-10 18:45:25 +02:00
andreas 223b787675 Fix customization parameters 2026-06-10 18:36:20 +02:00
andreas 4c52425591 Fix for virt-customize call. 2026-06-10 18:25:23 +02:00
andreas 03ced3d1b1 Further gemma fixes 2026-06-10 18:18:47 +02:00
andreas 51fd19f45a Several fixes by Gemma, unverified 2026-06-10 17:12:12 +02:00
8 changed files with 42 additions and 44 deletions
+4 -7
View File
@@ -5,9 +5,7 @@ This project provides an Ansible-based framework to automatically provision virt
## 🚀 Features
- **Automated Host Setup**: Installs and configures `libvirt`, `qemu-kvm`, and `libguestfs-tools`.
- **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.
- **Ignition Support**: Generates and injects Ignition configuration for all supported OSs via the `fw_cfg` QEMU feature.
- **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.
@@ -22,7 +20,7 @@ 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/Cloud-init config files
│ ├── os_config/ # Generates Ignition configuration files
│ └── vm_provision/ # Downloads images and creates VMs via virt-install
└── playbooks/
└── create_vms.yml # Main orchestration playbook
@@ -67,9 +65,8 @@ 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) or YAML (Cloud-init) file based on your variables.
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.
1. **Config Generation**: The `os_config` role creates a JSON Ignition configuration 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.
## 🌐 Accessing your VMs
+2
View File
@@ -27,4 +27,6 @@
cpu: "{{ item.cpu }}"
ram: "{{ item.ram }}"
disk: "{{ item.disk }}"
disk_bus: "{{ item.disk_bus }}"
loop: "{{ vms }}"
@@ -1,12 +1,6 @@
---
- name: Generate Ignition config for CoreOS/Flatcar
- name: Generate Ignition config
template:
src: ignition.json.j2
dest: "/tmp/{{ vm_name }}_ignition.json"
when: os_type == "coreos" or os_type == "flatcar"
dest: "/tmp/{{ vm_name }}.ign"
- name: Generate Cloud-init config for MicroOS
template:
src: user-data.yaml.j2
dest: "/tmp/{{ vm_name }}_user-data"
when: os_type == "microos"
@@ -1,26 +1,15 @@
{
"ignition": {
"version": "0.3.0"
"version": "3.0.0"
},
"passwd": {
"users": [
{
"name": "{{ vm_user }}",
"password_hash": "{{ vm_password | password_hash('sha512') }}",
"ssh_public_keys": [
"{{ lookup('file', vm_ssh_public_key) }}"
"sshAuthorizedKeys": [
"{{ lookup('file', vm_ssh_public_key | replace('~', lookup('env', 'HOME'))) }}"
]
}
]
},
"storage": {
"files": [
{
"path": "/etc/ssh/sshd_config.d/permit_root_login.conf",
"contents": {
"source": "data:text/plain;charset=utf-8,PermitRootLogin yes"
}
}
]
}
}
@@ -0,0 +1,11 @@
#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
@@ -1,8 +1,7 @@
#cloud-config
users:
- name: {{ vm_user }}
passwd: {{ vm_password | password_hash('sha512') }}
ssh_authorized_keys:
- {{ lookup('file', vm_ssh_public_key) }}
sudo: ALL=(ALL) NOPASSWD:ALL
ssh_authorized_keys:
- {{ lookup('file', vm_ssh_public_key | replace('~', lookup('env', 'HOME'))) }}
lock_passwd: false
@@ -41,29 +41,32 @@
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: |
virt-install \
--name {{ vm_name }} \
--vcpus {{ cpu | default(default_cpu) }} \
--memory {{ ram | default(default_ram) }} \
--disk path={{ vm_images_dir }}/{{ vm_name }}.qcow2,bus=virtio \
--machine q35 \
--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 \
{% if os_type == 'coreos' or os_type == 'flatcar' %}
--cloud-init user-data=/tmp/{{ vm_name }}_ignition.json
{% elif os_type == 'microos' %}
--cloud-init user-data=/tmp/{{ vm_name }}_user-data
{% endif %}
--sysinfo type=fwcfg,entry0.name="opt/com.coreos/config",entry0.file="/tmp/{{ vm_name }}.ign"
args:
creates: "/etc/libvirt/qemu/{{ vm_name }}.xml"
- name: Attach configuration to VM
debug:
msg: "Configuration is now handled by virt-install --cloud-init flag."
when: false # This task is now obsolete
become: yes
+4 -1
View File
@@ -3,6 +3,7 @@ vms:
- name: coreos-vm
os_type: coreos
os_variant: "fedora-coreos-stable"
disk_bus: "virtio"
cpu: 2
ram: 2048
disk: "20G"
@@ -10,13 +11,15 @@ vms:
- name: flatcar-vm
os_type: flatcar
os_variant: "fedora-coreos-stable"
disk_bus: "virtio"
cpu: 2
ram: 2048
disk: "20G"
- name: microos-vm
os_type: microos
os_variant: "opensusemicroos"
os_variant: "generic"
disk_bus: "virtio"
cpu: 2
ram: 2048
disk: "20G"