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How to do it...

Update the group_vars/all.yml file with the following parameters to define the various system-level parameters such as dns and system users, as shown in the following code:

$ cat group_vars/all.yml
tmp_dir: ./tmp
config_dir: ./configs
global:
  dns:
  - 172.20.1.1
  - 172.20.1.15
  root_pwd: $1$ciI4raxU$XfCVzABJKdALim0aWVMql0
  users:
  -   role: super-user
      SSH_key: Ansible_SSH_key.pub
      username: admin
  -   hash: $1$mR940Z9C$ipX9sLKTRDeljQXvWFfJm1
      passwd: 14161C180506262E757A60
      role: super-user
      username: Ansible

Create a new playbook called pb_jnpr_basic_config.yml with the following tasks, to set up dns, hostname and system users on Juniper devices:

$ cat pb_jnpr_basic_config.yml
---
- name: Configure Juniper Devices
  hosts: junos
  tasks:
    - name: "Conifgure Basic System config"
      junos_system:
        hostname: "{{ inventory_hostname }}"
        name_servers: "{{ global.dns }}"
        state: present
    - name: "Configure Users"
      junos_user:
        name: "{{ item.username }}"
        role: "{{ item.role }}"
        SSHkey: "{{ lookup ('file', item.SSH_key) }}"
        state: present
      with_items: "{{ global.users | selectattr('SSH_key','defined') | list }}"

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