Introduction to Junos Platform Automation and Devops

Module 09: JSON and YAML

JSON and YAML Data Structures

Certain data types are the same across platforms: boolean, integer, string, null. Complex, or ‘bundled’, data types are list, dictionary, etc..

[
    {
        "name": "Retrieve interface information",
        "hosts": "vmx_devices",
        "roles": [ "Juniper.junos" ]
    }
]

YAML is a superset of JSON with improved readability. Every JSON file is a YAML file, but the reverse is not true.

---
- name: Retrieve interface information
  hosts: vmx_devices
  roles:
   - Juniper.junos

Lab

Example Ansible Playbook

retrieveinterfacestatus.yml;

---
- name: Retrieve interface information
  hosts: vmx_devices
  roles:
   - Juniper.junos
   connection: local
   gather_facts: no

   vars_prompt:
    - name: USERNAME
      prompt: Username
      private: no
    - name: DEVICE_PASSWORD
      prompt: Password
      private: yes

   tasks:
    - name: Get Junos device information
      juniper_junos_command:
        user: "{{ USERNAME }}"
        passwd: "{{ DEVICE_PASSWORD }}"
        commands:
         - show interfaces ge-0/0/[01]* terse
      register: cmd_output

    - name: Print result
      debug:
        msg: "{{ cmd output.stdout lines }}"

Run the playbook with;

ansible-playbook retrieve_interface_status.yml