After upgrade to Netbox 4.2.9 netbox-ansible inventory stops working

[DC-Rasmus-Elmholt]

I have just spend some time developing small ansible plays to update netbox with information from our network devices.

But after upgrading netbox to version 4.2.9 I am not able to get ansible to use the netbox instance as the inventory anymore.

I have followed the installation guide from https://netboxlabs.com/blog/getting-started-with-network-automation-netbox-ansible/ as with the old version of netbox but somehow I am unable to get ansible to connect.

$ pyenv install 3.13.1
$ python -m venv .venv
$ python --version
Python 3.13.1
$ source .venv/bin/activate

$ pip install --upgrade pip
$ pip install ansible
$ pip install netaddr
$ pip install pytz
$ ansible-galaxy collection install netbox.netbox

 export NETBOX_TOKEN=c0b5473a************************
 export NETBOX_API=https://netbox.domain.dk/

$ cat nb_inv.yml
---
plugin: netbox.netbox.nb_inventory
validate_certs: false
config_context: false

$ ansible-inventory --list -i nb_inv.yml
[WARNING]:  * Failed to parse /home/x_aterel/ansible/network/nb_inv.yml with auto plugin: The read operation timed out
[WARNING]:  * Failed to parse /home/x_aterel/ansible/network/nb_inv.yml with yaml plugin: Plugin configuration YAML
file, not YAML inventory
[WARNING]:  * Failed to parse /home/x_aterel/ansible/network/nb_inv.yml with ini plugin: Invalid host pattern '---'
supplied, '---' is normally a sign this is a YAML file.
[WARNING]: Unable to parse /home/x_aterel/ansible/network/nb_inv.yml as an inventory source
[WARNING]: No inventory was parsed, only implicit localhost is available
{
    "_meta": {
        "hostvars": {}
    },
    "all": {
        "children": [
            "ungrouped"
        ]
    }
}

The strange thing is that sometimes I get a reply with the entire inventory as normal, and sometimes I get the result above. And once in a while I get some python SSL errors.

[DC-Rasmus-Elmholt]

Here is an example from when it fails with a python SSL error:

$ ansible-inventory --list -i nb_inv.yml
Exception in thread Thread-4 (wrapper):
Exception in thread Thread-7 (wrapper):
Traceback (most recent call last):
Traceback (most recent call last):
  File "/home/username/.pyenv/versions/3.13.1/lib/python3.13/threading.py", line 1041, in _bootstrap_inner
    self.run()
    ~~~~~~~~^^
  File "/home/username/.pyenv/versions/3.13.1/lib/python3.13/threading.py", line 1041, in _bootstrap_inner
    self.run()
    ~~~~~~~~^^
  File "/home/username/.pyenv/versions/3.13.1/lib/python3.13/threading.py", line 992, in run
    self._target(*self._args, **self._kwargs)
    ~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/username/.ansible/collections/ansible_collections/netbox/netbox/plugins/inventory/nb_inventory.py", line 1576, in wrapper
    raise e
  File "/home/username/.ansible/collections/ansible_collections/netbox/netbox/plugins/inventory/nb_inventory.py", line 1571, in wrapper
    lookup()
    ~~~~~~^^
  File "/home/username/.ansible/collections/ansible_collections/netbox/netbox/plugins/inventory/nb_inventory.py", line 1053, in refresh_platforms_lookup
    platforms = self.get_resource_list(api_url=url)
  File "/home/username/.ansible/collections/ansible_collections/netbox/netbox/plugins/inventory/nb_inventory.py", line 512, in get_resource_list
    api_output = self._fetch_information(api_url)
  File "/home/username/.ansible/collections/ansible_collections/netbox/netbox/plugins/inventory/nb_inventory.py", line 455, in _fetch_information
    response = open_url(
        url,
    ...<6 lines>...
        ca_path=self.ca_path,
    )
  File "/home/username/ansible/network/.venv/lib/python3.13/site-packages/ansible/module_utils/urls.py", line 995, in open_url
    return Request().open(method, url, data=data, headers=headers, use_proxy=use_proxy,
           ~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                          force=force, last_mod_time=last_mod_time, timeout=timeout, validate_certs=validate_certs,
                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    ...<3 lines>...
                          use_gssapi=use_gssapi, unix_socket=unix_socket, ca_path=ca_path,
                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                          unredirected_headers=unredirected_headers, decompress=decompress, ciphers=ciphers, use_netrc=use_netrc)
                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/username/ansible/network/.venv/lib/python3.13/site-packages/ansible/module_utils/urls.py", line 899, in open
    r = urllib.request.urlopen(request, None, timeout)
  File "/home/username/.pyenv/versions/3.13.1/lib/python3.13/urllib/request.py", line 189, in urlopen
    return opener.open(url, data, timeout)
           ~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^

[peterbaumert]

How you installed netbox? Native on linux, docker or helm etc?

[DC-Rasmus-Elmholt]

Hi @peterbaumert

I installed a new version of netbox-docker using: https://github.com/netbox-community/netbox-docker
Backed up the old version and restored it into the new docker-compose folder using the method described here: https://github.com/netbox-community/netbox-docker/wiki/Troubleshooting

And we are running a traefik reverse proxy in front of it.