---
- name: Install isc-dhcp-server
  apt:
    name: isc-dhcp-server

- name: Configure isc-dhcp-server
  template:
    src: "{{ item.src }}"
    dest: "{{ item.dest }}"
    mode: u=rw,g=r,o=
    owner: root
    group: root
  loop:
    - src: dhcpd.conf.j2
      dest: /etc/dhcp/dhcpd.conf
    - src: default.j2
      dest: /etc/default/isc-dhcp-server
  notify:
    - Restart isc-dhcp-server

#- src: dhcpd6.conf.j2
#  dest: /etc/dhcp/dhcpd6.conf

- name: Enable and start isc-dhcp-server
  systemd:
    name: isc-dhcp-server.service
    state: started
    enabled: true
...