docu(readme): document dict-based variables and examples

inventory_libvirt_example.yml

@@ -1,65 +1,126 @@
 ---
 all:
   vars:
-    install_type: "virtual"
     hypervisor:
       type: "libvirt"
-    install_drive: "/dev/vda"
+      url: "localhost"
+      username: ""
+      password: ""
+      host: ""
+      storage: "default"
     boot_iso: "/var/lib/libvirt/images/archlinux-x86_64.iso"
   children:
     libvirt:
       hosts:
-        web01.example.com:
-          ansible_host: 192.168.122.10
-          os: "debian"
-          os_version: "12"
+        web01.local:
+          ansible_host: 192.168.122.20
           filesystem: "ext4"
           system:
-            name: "web01.example.com"
+            type: "virtual"
+            os: "debian"
+            os_version: "12"
+            name: "web01.local"
             cpus: 2
-            memory_mb: 2048
-            ip: 192.168.122.10
+            memory: 2048
+            network: "default"
+            ip: 192.168.122.20
             prefix: 24
             gateway: 192.168.122.1
-            dns_servers: 1.1.1.1
+            dns:
+              servers:
+                - 1.1.1.1
+              search:
+                - lab.local
+            path: "/var/lib/libvirt/images"
             disks:
               - size: 30
-          extra_packages:
-            - nginx
-            - fail2ban
-        vault01.example.com:
-          ansible_host: 192.168.122.11
-          os: "ubuntu-lts"
+              - size: 80
+                mount:
+                  path: /var/www
+                  fstype: xfs
+            user:
+              name: "web"
+              password: "CHANGE_ME"
+              public_key: "ssh-ed25519 AAAA..."
+            root:
+              password: "CHANGE_ME"
+            packages:
+              - nginx
+              - curl
+            features:
+              firewall:
+                enabled: true
+                backend: "ufw"
+                toolkit: "nftables"
+        db01.local:
+          ansible_host: 192.168.122.21
+          filesystem: "xfs"
+          rhel_iso: "/var/lib/libvirt/images/rhel-9.4-x86_64-dvd.iso"
+          system:
+            type: "virtual"
+            os: "rhel"
+            os_version: "9"
+            name: "db01.local"
+            cpus: 4
+            memory: 4096
+            network: "default"
+            ip: 192.168.122.21
+            prefix: 24
+            gateway: 192.168.122.1
+            dns:
+              servers:
+                - 9.9.9.9
+              search:
+                - example.com
+            disks:
+              - size: 60
+              - size: 120
+                mount:
+                  path: /data
+                  fstype: ext4
+            user:
+              name: "db"
+              password: "CHANGE_ME"
+              public_key: "ssh-ed25519 AAAA..."
+            root:
+              password: "CHANGE_ME"
+            luks:
+              enabled: true
+              passphrase: "CHANGE_ME"
+              auto_decrypt_method: "keyfile"
+            features:
+              firewall:
+                enabled: false
+                backend: "firewalld"
+                toolkit: "nftables"
+        compute01.local:
+          ansible_host: 192.168.122.22
           filesystem: "btrfs"
           system:
-            name: "vault01.example.com"
-            cpus: 2
-            memory_mb: 4096
-            ip: 192.168.122.11
+            type: "virtual"
+            os: "fedora"
+            os_version: "41"
+            name: "compute01.local"
+            cpus: 8
+            memory: 8192
+            network: "default"
+            ip: 192.168.122.22
             prefix: 24
             gateway: 192.168.122.1
-            dns_search: "example.com"
-            disks:
-              - size: 40
-          luks_enabled: true
-          luks_passphrase: "CHANGE_ME"
-          luks_auto_decrypt_method: "keyfile"
-          firewall_enabled: false
-        rhel9.example.com:
-          ansible_host: 192.168.122.12
-          os: "rhel"
-          os_version: "9"
-          filesystem: "xfs"
-          system:
-            name: "rhel9.example.com"
-            cpus: 4
-            memory_mb: 8192
-            vlan: "100"
-            ip: 192.168.122.12
-            prefix: 24
-            gateway: 192.168.122.1
-            dns_servers: "1.1.1.1,1.0.0.1"
-            path: "/srv/libvirt/images"
+            dns:
+              servers: "1.1.1.1,1.0.0.1"
             disks:
               - size: 80
-          rhel_iso: "/var/lib/libvirt/images/rhel-9.4-x86_64-dvd.iso"
+              - size: 200
+                mount:
+                  path: /data
+                  fstype: btrfs
+            user:
+              name: "compute"
+              password: "CHANGE_ME"
+              public_key: "ssh-ed25519 AAAA..."
+            root:
+              password: "CHANGE_ME"
+            features:
+              cis:
+                enabled: true