Lab 6 - Solution¶

Mandatory¶

Your first role¶

Check out the copy module, you will use it in this lab.
Connect to your srv.<firstname>.lab as ansible user
Switch into your git repo /home/ansible/training
create a roles directory
Create a ntp role directory
Create a ntp/files directory
Copy your /etc/ntp.conf into this directory -> cp /etc/ntp.conf /home/ansible/training/roles/ntp/files/ntp.conf
Create a ntp role with the following tasks in the tasks/main.yml.
- installation via apt module
- configuration via copy module (src: ntp.conf)
- notify a handler after a config change

mkdir /home/ansible/training/roles
mkdir -p /home/ansible/training/roles/ntp/tasks
mkdir /home/ansible/training/roles/ntp/handlers
mkdir /home/ansible/training/roles/ntp/files
vi /home/ansible/training/roles/ntp/tasks/main.yml
vi /home/ansible/training/roles/ntp/handlers/main.yml
cp /etc/ntp.conf /home/ansible/training/roles/ntp/files/ntp.conf

tree /home/ansible/training/roles/
    .
    └── ntp
        ├── files
        │   └── ntp.conf
        ├── handlers
        │   └── main.yml
        └── tasks
            └── main.yml

# file: roles/ntp/tasks/main.yml
    ---
    - name: install ntp
      apt:
        name: ntp
        state: latest

    - name: configure ntp
      copy:
        src: ntp.conf
        dest: /etc/ntp.conf
        owner: root
        group: root
        mode: 0644
      notify: restart ntp

    # file: roles/ntp/handlers/main.yml
    ---
    - name: restart ntp
      service:
        name: ntp
        state: restarted

Playbook with a role¶

Create a new playbook named ntp-role.yml
Link web1.<firstname>.lab with the new role
Run the playbook

# file: ntp-role.yml
---
- hosts: web1.pascal.lab
  roles:
    - ntp

ansible-playbook ntp-role.yml

Add Tags to the ntp role¶

Tag the configuration task with configuration
Tag the installation task with installation

# file: roles/ntp/tasks/main.yml
    ---
    - name: install ntp
      apt:
        name: ntp
        state: latest
      tags:
        - installation

    - name: configure ntp
      copy:
        src: ntp.conf
        dest: /etc/ntp.conf
        owner: root
        group: root
        mode: 0644
      notify: restart ntp
      tags:
        - configuration

Test the handler¶

change the ntp config files/ntp.conf
Run the playbook again -> service should be restarted

echo "# comment" >> roles/ntp/files/ntp.conf

RUNNING HANDLER [ntp : restart ntp] ********************************************
changed: [web1.pascal.lab]

Create a python-pip role¶

Create a new python-pip role
use the package module for the installation of the package python-pip

# file: roles/python-pip/tasks/main.yml
    ---
    - name: install python-pip
      package:
        name: python-pip
        state: latest
      tags:
        - installation

extend the role list with the python-pip role in the already existing ntp-role.yml playbook

# file: ntp-role.yml
---
- hosts: web1.pascal.lab
  roles:
    - ntp
    - python-pip

Run playbook with tag¶

Run only the tag installation

ansible-playbook -t installation ntp-role.yml

Commit your changes¶

add all files to your git repo and commit it

git status
git add roles
git add ntp-role.yml
git add roles/.
git commit -m 'added ntp and python-pip role, included in playbook'