---
- name: Install redis server
  become: yes
  apt:
    name: redis-server
    state: present

- name: Install redis configuration file
  become: yes
  template:
    src: redis.conf.j2
    dest: /etc/redis/redis.conf
    owner: redis
    group: redis
    mode: u=r,g=,o=
  notify: Restart redis-server

- name: Enable redis-server service
  become: yes
  systemd:
    name: redis-server.service
    state: started
    enabled: yes
...