Junos OS Platform Options

Juniper Junos OS supports multiple connections. This page offers details on how each connection works in Ansible and how to use it.

• Connections Available
• Using CLI in Ansible
  • Example CLI inventory [junos:vars]
  • Example CLI Task
• Using NETCONF in Ansible
  • Enabling NETCONF
  • Example NETCONF inventory [junos:vars]
  • Example NETCONF Task

Connections Available

	CLI junos_netconf & junos_command modules only	NETCONF all modules except junos_netconf, which enables NETCONF
Protocol	SSH	XML over SSH
Credentials	uses SSH keys / SSH-agent if present accepts -u myuser -k if using password	uses SSH keys / SSH-agent if present accepts -u myuser -k if using password
Indirect Access	via a bastion (jump host)	via a bastion (jump host)
Connection Settings	ansible_connection: network_cli	ansible_connection: netconf
Enable Mode (Privilege Escalation)	not supported by Junos OS	not supported by Junos OS
Returned Data Format	stdout[0].	json: result[0]['software-information'][0]['host-name'][0]['data'] foo lo0 text: result[1].interface-information[0].physical-interface[0].name[0].data foo lo0 xml: result[1].rpc-reply.interface-information[0].physical-interface[0].name[0].data foo lo0

For legacy playbooks, Ansible still supports ansible_connection=local on all JUNOS modules. We recommend modernizing to use ansible_connection=netconf or ansible_connection=network_cli as soon as possible.

Using CLI in Ansible

Example CLI inventory [junos:vars]

[junos:vars]
ansible_connection=network_cli
ansible_network_os=junos
ansible_user=myuser
ansible_password=!vault...
ansible_ssh_common_args='-o ProxyCommand="ssh -W %h:%p -q bastion01"'

• If you are using SSH keys (including an ssh-agent) you can remove the ansible_password configuration.
• If you are accessing your host directly (not through a bastion/jump host) you can remove the ansible_ssh_common_args configuration.
• If you are accessing your host through a bastion/jump host, you cannot include your SSH password in the ProxyCommand directive. To prevent secrets from leaking out (for example in ps output), SSH does not support providing passwords via environment variables.

Example CLI Task

- name: Retrieve Junos OS version
  junos_command:
    commands: show version
  when: ansible_network_os == 'junos'

Using NETCONF in Ansible

Enabling NETCONF

Before you can use NETCONF to connect to a switch, you must:

• install the ncclient python package on your control node(s) with pip install ncclient
• enable NETCONF on the Junos OS device(s)

To enable NETCONF on a new switch via Ansible, use the junos_netconf module via the CLI connection. Set up your platform-level variables just like in the CLI example above, then run a playbook task like this:

- name: Enable NETCONF
  connection: network_cli
  junos_netconf:
  when: ansible_network_os == 'junos'

Once NETCONF is enabled, change your variables to use the NETCONF connection.

Example NETCONF inventory [junos:vars]

[junos:vars]
ansible_connection=netconf
ansible_network_os=junos
ansible_user=myuser
ansible_password=!vault |
ansible_ssh_common_args='-o ProxyCommand="ssh -W %h:%p -q bastion01"'

Example NETCONF Task

- name: Backup current switch config (junos)
  junos_config:
    backup: yes
  register: backup_junos_location
  when: ansible_network_os == 'junos'