ansible-roles/mysql/tasks/munin.yml

---

- name: is Munin present ?
  stat:
    path: /etc/munin/plugin-conf.d/munin-node
  check_mode: no
  register: munin_node_plugins_config
  tags:
    - mysql
    - munin

- block:
  - name: "Install perl libraries for Munin (Debian < 11)"
    apt:
      name:
        - libdbd-mysql-perl
        - libcache-cache-perl
      state: present
    when: ansible_distribution_major_version is version('11', '<')

  - name: "Install perl libraries for Munin (Debian >= 11)"
    apt:
      name:
        - libcache-cache-perl
        - libdbd-mariadb-perl
    when: ansible_distribution_major_version is version('11', '>=')

  - name: Enable core Munin plugins
    file:
      src: '/usr/share/munin/plugins/{{ item }}'
      dest: /etc/munin/plugins/{{ item }}
      state: link
    loop:
      - mysql_bytes
      - mysql_queries
      - mysql_slowqueries
      - mysql_threads
    notify: restart munin-node

  - name: Enable contributed Munin plugins
    file:
      src: /usr/share/munin/plugins/mysql_
      dest: '/etc/munin/plugins/mysql_{{ item }}'
      state: link
    loop:
      - commands
      - connections
      - files_tables
      - innodb_bpool
      - innodb_bpool_act
      - innodb_insert_buf
      - innodb_io
      - innodb_io_pend
      - innodb_log
      - innodb_rows
      - innodb_semaphores
      - myisam_indexes
      - network_traffic
      - qcache
      - qcache_mem
      - select_types
      - slow
      - sorts
      - table_locks
      - tmp_tables
      - replication
    notify: restart munin-node

  - name: verify Munin configuration for mysql < Debian 11
    replace:
      dest: /etc/munin/plugin-conf.d/munin-node
      after: '\[mysql\*\]'
      regexp: '^env.mysqluser (.+)$'
      replace: 'env.mysqluser debian-sys-maint'
    notify: restart munin-node
    when: ansible_distribution_major_version is version_compare('11', '<')

  - name: set Munin env.mysqluser option for mysql >= Debian 11
    replace:
      dest: /etc/munin/plugin-conf.d/munin-node
      after: '\[mysql\*\]'
      regexp: '^env.mysqluser (.+)$'
      replace: 'env.mysqluser root'
    notify: restart munin-node
    when: ansible_distribution_major_version is version_compare('11', '>=')

  - name: set Munin env.mysqlopts option for mysql >= Debian 11
    replace:
      dest: /etc/munin/plugin-conf.d/munin-node
      after: '\[mysql\*\]'
      regexp: '^env.mysqlopts (.+)$'
      replace: 'env.mysqlopts --defaults-file=/root/.my.cnf'
    notify: restart munin-node
    when: ansible_distribution_major_version is version_compare('11', '>=')

  - name: set Munin env.mysqlconnection option for mysql >= Debian 11
    replace:
      dest: /etc/munin/plugin-conf.d/munin-node
      after: '\[mysql\*\]'
      regexp: '^env.mysqlconnection (.+)$'
      replace: 'env.mysqlconnection DBI:mysql:mysql;mysql_read_default_file=/root/.my.cnf'
    notify: restart munin-node
    when: ansible_distribution_major_version is version_compare('11', '>=')


  when: munin_node_plugins_config.stat.exists
  tags:
    - mysql
    - munin