Example using inventory_hostname

[FloLaco]

Hello guys,

When we follow examples (http://napalm.readthedocs.io/en/latest/tutorials/ansible-napalm.html or https://github.com/napalm-automation/napalm-ansible#examples), the hostname is using the {{ inventory_hostname }}

But a classic host file is :

[cisco]
spine1 ansible_host=10.0.100.101
spine2 ansible_host=10.0.100.102
leaf1 ansible_host=10.0.100.103
leaf2 ansible_host=10.0.100.104
leaf3 ansible_host=10.0.100.105
leaf4 ansible_host=10.0.100.106

[cisco:vars]
ansible_python_interpreter= "/usr/bin/env python"

Here's the playbook example :

- name: Test Inventory #The Task Name
  hosts: cisco         #This will be in your ansible inventory file
  connection: local    #Required
  gather_facts: no     #Do not gather facts

  tasks:                                     #Begin Tasks
    - name: get facts from device            #Task Name
      napalm_get_facts:                      #Call the napalm module, in this case napal_get_facts
        hostname: "{{ inventory_hostname }}" #This is a parameter and is derived from your ansible inventory file
        username: 'admin'                     #The username to ssh with
        dev_os: 'nxos_ssh'                        #The hardware operating system
        password: 'xxxx'                 #The line level password
        filter: 'facts'                      #The list of items you want to retrieve. The filter keyword is _inclusive_ of what you want
      register: result                       #Ansible function for collecting output

    - name: print results                    #Task Name
      debug: msg="{{ result }}"              #Display the collected output

The playbook does not work

(flacommare_venv2.7) florian@ubuntuvm:~/ansible$ ansible-playbook playbooks/get_facts.yaml -i inventory/host.ini

PLAY [Test Inventory] ************************************************************************************************************************************************************************************************************************

TASK [get facts from device] *****************************************************************************************************************************************************************************************************************
fatal: [leaf2]: FAILED! => {"changed": false, "msg": "cannot connect to device: Cannot connect to leaf2"}
fatal: [leaf1]: FAILED! => {"changed": false, "msg": "cannot connect to device: Cannot connect to leaf1"}
fatal: [leaf3]: FAILED! => {"changed": false, "msg": "cannot connect to device: Cannot connect to leaf3"}
fatal: [spine2]: FAILED! => {"changed": false, "msg": "cannot connect to device: Cannot connect to spine2"}
fatal: [spine1]: FAILED! => {"changed": false, "msg": "cannot connect to device: Cannot connect to spine1"}
fatal: [leaf4]: FAILED! => {"changed": false, "msg": "cannot connect to device: Cannot connect to leaf4"}
    to retry, use: --limit @/home/florian/ansible/playbooks/get_facts.retry

PLAY RECAP ***********************************************************************************************************************************************************************************************************************************
leaf1                      : ok=0    changed=0    unreachable=0    failed=1
leaf2                      : ok=0    changed=0    unreachable=0    failed=1
leaf3                      : ok=0    changed=0    unreachable=0    failed=1
leaf4                      : ok=0    changed=0    unreachable=0    failed=1
spine1                     : ok=0    changed=0    unreachable=0    failed=1
spine2                     : ok=0    changed=0    unreachable=0    failed=1

Indeed, the module code set the local params to override provider. (https://github.com/napalm-automation/napalm-ansible/blob/8d868d387f095117c6bb63f828f92a5b84166945/napalm_ansible/modules/napalm_get_facts.py#L192) So my IP is not use but the "name" of the equipment, which is not a dns entry.

Is there some mistake in my inventory file ? Or maybe the example have a mistake and should use {{ ansible_host }} instead ?

[ktbyers]

Yes, you need to use {{ ansible_host }} and not {{ inventory_hostname }}

[cisco]
spine1 ansible_host=10.0.100.101
spine2 ansible_host=10.0.100.102
leaf1 ansible_host=10.0.100.103
leaf2 ansible_host=10.0.100.104
leaf3 ansible_host=10.0.100.105
leaf4 ansible_host=10.0.100.106

inventory_hostname is spine1, spine2, et cetera and would need to be DNS resolvable to work in the playbook.

[targuan]

You should follow the last example which doen't use any hostname parameter. If you don't provide the hostname parameter, ansible_host will be used instead of the inventory hostname if provided in the vars.