add the current state of the vmsetup

roles/setup-libvirt/defaults/main.yml

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+---
+vm_host_bridge_interface: eno1

roles/setup-libvirt/tasks/main.yml

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+---
+- name: install libvirt and tools
+  package:
+    name:
+      - libvirt-daemon-system 
+      - qemu-system
+    state: latest
+
+- name: Make sure config directory exists
+  file:
+    path: /etc/systemd/network
+    state: directory
+      
+- name: copy network config
+  template:
+    src: "{{ item }}"
+    dest: "/etc/systemd/network/"
+  with_items:
+    - "br0.netdev"
+    - "br0.network"
+    - "ethernet.network"
+
+- name: check if /etc/network/interfaces exists
+  stat: path="/etc/network/interfaces"
+  register: interfaces
+
+- name: disable /etc/network/interfaces
+  command: mv /etc/network/interfaces /etc/network/interfaces.disabled
+  when: interfaces.stat.exists
+
+- name: start and enable systemd-networkd
+  service: name=systemd-networkd state=restarted enabled=yes 
+
+- name: start and enable systemd-resolved
+  service: name=systemd-resolved state=restarted enabled=yes
+
+- name: Disable old network scripts and NetworkManager
+  service:
+    name: "{{ item }}"
+    enabled: no
+    state: stopped
+  with_items:
+    - networking
+    - network-manager
+    - NetworkManager
+  ignore_errors: true
+
+- name: Make a symlink for resolv.conf to use systemd-resolved
+  file:
+    dest: /etc/resolv.conf
+    src: /run/systemd/resolve/stub-resolv.conf
+
+- name: Create libvirt bridge config
+  copy:
+    dest: /etc/qemu/bridge.conf
+    content: "allow br0"
+
+- name: setuid for qemu-bridge-helper
+  file:
+    path: /usr/lib/qemu/qemu-bridge-helper
+    mode: 04755
+
+  

roles/setup-libvirt/templates/br0.netdev

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+[NetDev]
+Name=br0
+Kind=bridge

roles/setup-libvirt/templates/br0.network

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+[Match]
+Name=br0
+
+[Link]
+MACAddress={{ mac }}
+
+[Network]
+DHCP=yes
+LinkLocalAddressing=ipv6

roles/setup-libvirt/templates/ethernet.network

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+[Match]
+Name={{ vm_host_bridge_interface }}
+
+[Network]
+Bridge=br0