playbook.yml

---
- hosts: all
  pre_tasks:
    - name: "Installing which"
      action: yum
              name={{ item }}
              state=installed
      with_items:
        - net-tools
        - which
        - libselinux-python
      register: installation_dependencies

    - name: "Configure SUDO."
      lineinfile:
        dest: /etc/sudoers
        line: "Defaults    !requiretty"
        state: present
      changed_when: installation_dependencies.changed

    - name: "Make sure the docs are installed."
      lineinfile:
        dest: /etc/yum.conf
        line: "tsflags=nodocs"
        state: absent
      changed_when: installation_dependencies.changed

  roles:
    - role: galaxyprojectdotorg.postgresql
      when: inventory_hostname in groups['postgresql']
      ignore_errors: True
    - role: geerlingguy.mysql
      when: inventory_hostname in groups['mysql']
      ignore_errors: True
    - role: ansible-zabbix-server