How to do it...

1. Inside the ch1_ansible folder, create a new folder called roles and create a new role called basic_config, as shown here:

$ mkdir roles
$ cd roles
$ ansible-galaxy init basic_config

2. Update the basic_config/vars/main.yml file with the following variable:

$ cat roles/basic_config/vars/main.yml

---
config_dir: basic_config

3. Update the basic_config/tasks/main.yml file with the following tasks:

$ cat roles/basic_config/tasks/main.yml

---
  - name: Create Configs Directory
    file:
      path: "{{ config_dir }}"
      state: directory
    run_once: yes

  - name: Generate Cisco Basic Config
    template:
      src: "{{os}}.j2"
      dest: "{{config_dir}}/{{inventory_hostname}}.cfg"

4. Inside the basic_config/templates folder, create the following structure:

$ tree roles/basic_config/templates/

roles/basic_config/templates/
├── ios.j2
└── junos.j2

$ cat roles/basic_config/templates/ios.j2
hostname {{ hostname }}
!
{% for server in ntp_servers %}
ntp {{ server }}
{% endfor %}

5. Create a new playbook, pb_ansible_role.yml, with the following content to use our role:

$ cat pb_ansible_role.yml
---
  - name: Build Basic Config Using Roles
    hosts: all
    connection: local
    roles:
      - basic_config