ansible-edda/plays/services/roles/setup_user/tasks/include/veth.yml

- name: "{{ services_service_name }} : veth : configure interface"
  ansible.builtin.template:
    src: "./veth/interface.j2"
    dest: "/etc/network/interfaces.d/{{ services_service_iface_name }}"
    mode: 0644
    validate: >
      bash -c
      'export NEWIF=%s;
       if ! diff ${NEWIF} /etc/network/interfaces.d/{{ services_service_iface_name }} &&
            ip link show dev {{ services_service_iface_name }} ;
       then
           ifdown {{ services_service_iface_name }} &&
           ifup -i ${NEWIF} {{ services_service_iface_name }} ;
       fi'
  vars:
    services_service_iface_name: "veth-{{ services_service_name }}"
    services_service_iface_address: "{{ services_host_services[services_service_name].address }}"

- name: "{{ services_service_name }} : veth : enable the path trigger"
  ansible.builtin.systemd:
    name: "connect-pod-service@{{ services_service_name }}.path"
    enabled: true
    state: "started"