ansible-roles/redis/tasks/default-munin.yml

---
- name: Install munin check dependencies
  ansible.builtin.apt:
    name: libswitch-perl
    state: present
  tags:
    - redis

- ansible.builtin.include_role:
    name: evolix/remount-usr
  tags:
    - redis

- name: Create plugin directory
  ansible.builtin.file:
    name: /usr/local/lib/munin/plugins/
    state: directory
    mode: "0755"
  tags:
    - redis

- name: Copy redis munin plugin
  ansible.builtin.copy:
    src: munin_redis
    dest: /usr/local/lib/munin/plugins/redis_
    mode: "0755"
  notify: restart munin-node
  tags:
    - redis

- name: Enable redis munin plugin
  ansible.builtin.file:
    src: /usr/local/lib/munin/plugins/redis_
    dest: "/etc/munin/plugins/redis_{{ plugin_name }}"
    state: link
  loop:
    - connected_clients
    - key_ratio
    - keys_per_sec
    - per_sec
    - used_keys
    - used_memory
  loop_control:
    loop_var: plugin_name
  notify: restart munin-node
  when: not ansible_check_mode
  tags:
    - redis

- name: Count redis condif blocks in munin-node configuration
  ansible.builtin.command:
    cmd: grep -c "\[redis_"  /etc/munin/plugin-conf.d/munin-node
  register: munin_redis_blocs_in_config
  failed_when: False
  changed_when: False
  check_mode: no

- name: Configure redis plugin for munin
  ansible.builtin.template:
    src: templates/munin-plugin-default.conf.j2
    dest: '/etc/munin/plugin-conf.d/z-evolinux-redis'
    mode: "0740"
  when:
    - redis_password is not none
    - redis_password | length > 0
    - (munin_redis_blocs_in_config.stdout | int) <= 1
  notify: restart munin-node
  tags: redis

- name: Warn if multiple instance in munin-plugins configuration
  ansible.builtin.debug:
    msg: "WARNING - It seems you have multiple redis sections in your munin-node configuration - Munin config NOT changed"
  when:
    - redis_password is not none
    - redis_password | length > 0
    - (munin_redis_blocs_in_config.stdout | int) > 1