Lab 8 - Templates
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Mandatory
=========

Replace copy with template
--------------------------
* Change your ``ntp`` role
* Create the ``templates`` directory in your ntp role ``/home/ansible/training/roles/ntp/templates``
* Create the template file ``templates/ntp.conf.j2`` (copy the ntp.conf file from ``files/ntp.conf``)
* In your tasks file, replace the ``copy`` module with the ``template`` module
* Add a new task to start and enable the ntp service (see `Service Module <http://docs.ansible.com/ansible/2.5/modules/service_module.html>`_)
* Run the playbook
* Verify the configuration file
* If everything works, delete the file ``files/ntp.conf``

.. hint::

    Don't forget the ``.j2`` file extension.


Use facts and ansible_header
----------------------------
* Add a comment in the ``ntp.conf.j2`` file with the fact ``ansible_os_family`` 
* Add a ``ansible_managed`` header in the ``ntp.conf.j2`` file
* Run the playbook and verify the configuration file on the managed host


Loop
----
* Replace the ``pool server`` entries in your template file ``ntp.conf.j2``
* Loop over your ``ntp_servers`` list in the template ``ntp.conf.j2``
* Run the playbook with diff, to see the changes
* Verify the configuration file


When Conditionals
-----------------
* Make sure the ``ntp`` role works on ``Debian`` and ``RedHat``
* Create the variable file ``vars/RedHat.yml`` and add the variable ``ntp_service`` with the value ``ntpd``
* Create a new task to include the variable file ``RedHat.yml`` (see `Include_Vars Module <http://docs.ansible.com/ansible/2.5/modules/include_vars_module.html>`_) -> Put this task in first place, to ensure it run before all other tasks
* Ensure, the ``include_vars`` task is running only on the ``ansible_os_family`` **RedHat** (see Chapter Variables)
* Define a role default in ``defaults/main.yml`` for the variable ``ntp_service`` with the value ``ntp``
* Use the new variable ``ntp_service`` in your ``handlers/main.yml`` and ``tasks/main.yml``
* Edit your installation task and use the ``package`` module instead of the ``apt`` module
* Edit your playbook to run the ntp role on the ``web`` hostgroup
* Run the playbook


Overwrite role default with group_vars
--------------------------------------
* Create a group_vars file for your ``db`` hostgroup
* Add the list variable ``ntp_servers`` with the items ``ntp1.lab``, ``ntp2.lab`` and ``ntp3.lab``
* Edit your playbook to run the ntp role ``all`` hosts
* Run the playbook
* Verify your ``db`` host has other ntp servers


Commit your changes
-------------------
* add all files to your git repo and commit it