Configure additional network interfaces in Ubuntu.

defaults/main.yml

@@ -25,6 +25,11 @@ sysctl_custom_options: []
 #   sysctl_reload: '{{ sysctl_opts_reload }}'
 #   sysctlfile_state: '{{ sysctl_custom_file_state }}'
 
+ubuntu_configure_additional_interfaces: true
+ubuntu_netplan_interfaces:
+  - name: "enp8s0"
+    dhcp4: true
+    mtu: "{{ ansible_enp8s0.mtu }}"
 disable_ipv6: false
 ipv6_sysctl_value: 1
 ipv6_sysctl_file: /etc/sysctl.d/10-ipv6-disable.conf

handlers/main.yml

@@ -1,2 +1,4 @@
 ---
-# handlers file for ansible-role-template
+- name: Netplan Apply
+  ansible.builtin.command:
+    cmd: netplan Apply

tasks/main.yml

@@ -9,6 +9,9 @@
   ansible.builtin.import_tasks: timezone.yml
 - name: Sysctl kernel parameters
   ansible.builtin.import_tasks: sysctl.yml
+- name: Additional network interface(s)
+  ansible.builtin.import_tasks:
+    - network-interfaces.yml
 - name: Create a directory that will contain the local generated certificates
   ansible.builtin.import_tasks: pki_dir.yml
 - name: Self signed certificates waiting for the letsencrypt ones

tasks/network-interfaces.yml

@@ -0,0 +1,30 @@
+---
+- name: network-interfaces | Manage additional network interfaces, Ubuntu style
+  tags:
+    - network_interface
+    - networking
+  when:
+    - ansible_distribution == 'Ubuntu'
+    - ubuntu_configure_additional_interfaces
+  block:
+    - name: network-interfaces | Check if netplan is in use
+      ansible.builtin.stat:
+        path: /etc/netplan
+      register: netplan_in_use
+    - name: network-interfaces | Check if additional interfaces have been defined
+      ansible.builtin.set_fact:
+        net_ints: "{% for i in ansible_interfaces %}{% if i != ansible_lo.device or i != ansible_default_ipv4.interface %}{{ i }}{% if not loop.last %},{% endif %}{% endfor %}"
+      when: netplan_in_use.stat.isdir
+    - name: network-interfaces | Create a dictionary of additional interfaces
+      ansible.builtin.set_fact:
+        new_ints: "[{% for i in ansible_interfaces %}{% if i != ansible_lo.device or i != ansible_default_ipv4.interface %}{{ i }}{% if not loop.last %},{% endif %}{% endfor %}]"
+      when: net_ints is not defined or net_ints == None or net_ints | length == 0
+    - name: network-interfaces | Install the network interface file
+      ansible.builtin.template:
+        src: 70-ansible.yaml.j2
+        dest: /etc/netplan/70-ansible.yaml
+        owner: root
+        group: root
+        mode: "0644"
+      when: net_ints is not defined or net_ints == None or net_ints | length == 0
+      notify: Netplan Apply

templates/70-ansible.yaml.j2

@@ -0,0 +1,7 @@
+network:
+    version: 2
+    ethernets:
+{% for int in ubuntu_netplan_interfaces %}
+        {{ int.name }}:
+            dhcp4: {{ int.dhcp4 }}
+            mtu: {{ int.mtu }}