---
- name: (redis-server.yml) Set var 'common_redis_conf'
  ansible.builtin.set_fact:
    common_redis_conf: >-
      {{
        '/etc/redis.conf'
        if ansible_facts['distribution'] == 'CentOS'
        else '/etc/redis/redis.conf'
      }}

- name: (redis-server.yml) update
  ansible.builtin.apt:
    update_cache: true
    cache_valid_time: >-
      {{
        0
        if apt_config_updated is defined and apt_config_updated.changed
        else apt_update_cache_valid_time
      }}
  when:
    - ansible_facts['distribution'] == "Debian"
    - apt_update|bool
  tags:
    - redis-server

- name: >-
    (redis-server.yml) Configure any half-installed packages
    'dpkg --configure -a'
  ansible.builtin.command: dpkg --configure -a
  register: common_dpkg_configure
  changed_when: (common_dpkg_configure.stdout | default('')) | length > 0
  failed_when: common_dpkg_configure.rc != 0
  when:
    - ansible_facts['distribution'] == "Debian"
    - apt_dpkg_configure|bool
  tags:
    - redis-server

- name: (redis-server.yml) upgrade
  ansible.builtin.apt:
    upgrade: "{{ apt_upgrade_type }}"
    update_cache: true
    dpkg_options: "{{ apt_upgrade_dpkg_options | join(',') }}"
  when:
    - ansible_facts['distribution'] == "Debian"
    - apt_upgrade|bool
  tags:
    - redis-server

- name: (redis-server.yml) Install redis-server packages (debian system)
  ansible.builtin.apt:
    name: redis-server
    state: present
  when:
    - ansible_facts['distribution'] == "Debian"
  tags:
    - redis-server

- name: (redis-server.yml) Install redis packages (centos / fedora system)
  ansible.builtin.dnf:
    name: redis
    state: present
    update_cache: true
  when:
    - ansible_facts["os_family"] == "RedHat"
    - ansible_distribution == "CentOS" or ansible_distribution == "Fedora"
  tags:
    - redis-server

- name: (redis-server.yml) Determine available users
  ansible.builtin.getent:
    database: passwd
  tags:
    - redis-server

- name: (redis-server.yml) Determine available groups
  ansible.builtin.getent:
    database: group
  tags:
    - redis-server

- name: (redis-server.yml) Add user 'www-data' to group 'redis'
  ansible.builtin.user:
    name: www-data
    groups: redis
    append: true
  when:
    - "'www-data' in my_users"
    - "'redis' in my_groups"
  vars:
    my_users: "{{ ansible_facts.getent_passwd.keys() | list }}"
    my_groups: "{{ ansible_facts.getent_group.keys() | list }}"
  tags:
    - redis-server

- name: (redis-server.yml) Add user 'webadmin' to group 'redis'
  ansible.builtin.user:
    name: webadmin
    groups: redis
    append: true
  when:
    - "'webadmin' in my_users"
    - "'redis' in my_groups"
  vars:
    my_users: "{{ ansible_facts.getent_passwd.keys() | list }}"
    my_groups: "{{ ansible_facts.getent_group.keys() | list }}"
  tags:
    - redis-server

- name: (redis-server.yml)  Check if redis configuration file exists
  ansible.builtin.stat:
    path: "{{ common_redis_conf }}.ORIG"
  register: common_redis_conf_exists
  tags:
    - redis-server

- name: (redis-server.yml) Backup existing redis configuration file.
  ansible.builtin.copy:
    src: "{{ common_redis_conf }}"
    dest: "{{ common_redis_conf }}.ORIG"
    remote_src: true
    mode: preserve
  when:
    - not common_redis_conf_exists.stat.exists
  tags:
    - redis-server

- name: (redis-server.yml) adjust redis configuration
  ansible.builtin.lineinfile:
    dest: "{{ common_redis_conf }}"
    regexp: "{{ item.regexp }}"
    insertafter: "{{ item.insertafter }}"
    line: "{{ item.key }} {{ item.val }}"
    state: present
  loop:
    - regexp: "^bind\\s+"
      key: "bind"
      val: "127.0.0.1 ::1"
      insertafter: "^#\\s*bind\\s+"
    - regexp: "^port\\s+"
      key: "port"
      val: "6379"
      insertafter: "^#\\s*port\\s+"
    - regexp: "^unixsocket\\s+"
      key: "unixsocket"
      val: "/run/redis/redis-server.sock"
      insertafter: "^#\\s*unixsocketperm"
    - regexp: "^unixsocketperm"
      key: "unixsocketperm"
      val: "770"
      insertafter: "^unixsocket\\s+"
    - regexp: "^logfile"
      key: "logfile"
      val: "/var/log/redis/redis-server.log"
      insertafter: "^#\\s+logfile\\s+"
  notify: "Restart redis-server"
  tags:
    - redis-server