Wildcards in ansible_facts

Get Help
,
1

Hello,

I’m attempting to loop over numerous network interfaces and send them to our NetBox instance. Unfortunately, due to the disparate types of servers and network interfaces that are provided, I would like to be able to use wildcards to loop over all interfaces of certain types. So far I have attempted the following:

    - name: Write interfaces and addresses
      include_tasks:
        file: interfaces.yml
      loop:
        - "{{ ansible_facts['ansible_eth*'] }}"
        - "{{ ansible_facts['ansible_'+eno*] }}"
        - "{{ ansible_facts['ansible_'+enp24s0f*] }}"

Unsurprisingly, ansible isn’t happy when I tried to do so:

TASK [Write interfaces and addresses] ********************************************************************************************
fatal: [<hostname>]: FAILED! => {"msg": "'dict object' has no attribute 'ansible_eth*'. 'dict object' has no attribute 'ansible_eth*'"}

I’m looking for guidance on how to best iterate over the interfaces. Any advice is greatly appreciated. If it’s relevant, ansible version info is below:

ansible [core 2.16.6]
  config file = /home/user/project-hpc-netbox-migration/ansible.cfg
  configured module search path = ['/home/user/.ansible/plugins/modules', '/usr/share/ansible/plugins/modules']
  ansible python module location = /opt/rci/miniconda3/envs/ansible/lib/python3.12/site-packages/ansible
  ansible collection location = /home/user/.ansible/collections:/usr/share/ansible/collections
  executable location = /opt/rci/miniconda3/envs/ansible/bin/ansible
  python version = 3.12.3 | packaged by Anaconda, Inc. | (main, May  6 2024, 19:46:43) [GCC 11.2.0] (/opt/rci/miniconda3/envs/ansible/bin/python)
  jinja version = 3.1.4
  libyaml = True
2

Hii

| sam_karateman
September 4 |

  • | - |

Hello,

I’m attempting to loop over numerous network interfaces and send them to our NetBox instance. Unfortunately, due to the disparate types of servers and network interfaces that are provided, I would like to be able to use wildcards to loop over all interfaces of certain types. So far I have attempted the following:

    - name: Write interfaces and addresses
      include_tasks:
        file: interfaces.yml
      loop:
        - "{{ ansible_facts['ansible_eth*'] }}"
        - "{{ ansible_facts['ansible_'+eno*] }}"
        - "{{ ansible_facts['ansible_'+enp24s0f*] }}"

Unsurprisingly, ansible isn’t happy when I tried to do so:

TASK [Write interfaces and addresses] ********************************************************************************************
fatal: [<hostname>]: FAILED! => {"msg": "'dict object' has no attribute 'ansible_eth*'. 'dict object' has no attribute 'ansible_eth*'"}

I’m looking for guidance on how to best iterate over the interfaces. Any advice is greatly appreciated.

Try looping over this:

loop: “{{ ansible_facts.interfaces | select(‘search’, ‘(eth|eno|enp24s0f)\d+’) }}”

That is a regex there, you may have to tweak it a bit further for your situation.

Dick

3 Likes
3

As a best practice you first filter facts using set_fact module using filters and iterate over the that variable or list of facts. loop matching the exact attribute name from facts.

ansible.builtin.set_fact:
my_loop_facts: “{{ ansible_facts[‘interfaces’] | select(‘search’, ‘^eth|^eno|^enp24s0f’) | list }}”

and then iterate over my_loop_facts variable.
loop:
my_loop_facts

-Mayur

4

I was able to get it working for the lookup based on the replies, but I’m having trouble referencing the variable from within ansible_facts. I would like to do something like this:

  when:
    - ansible_facts[\"{{ item }}\"][active] is true

but I’m not sure of what the correct syntax would be for referencing a variable from within the ansible_facts variable. Would anybody have a recommendation?