How to find network device by macaddress ?

[Don Jackson]

Here is a truncated version of a fact for one network interface on a server:

 "ansible_eth2": {

            "active": true,

            "device": "eth2",

            "macaddress": "30:0e:d5:cb:11:fe",

            "type": "ether"

        },       

And there are similar facts for each network interface.

Given that, I need to be able to find the value for "device" for a specific macaddress value.

How would I do that?

[Kai Stian Olstad]

Something like this.

mac.yml
---
- debug: msg="This is the mac"
when: hostvars[inventory_hostname]['ansible_' + item].macaddress |
default() == "xx:xx:xx:xx:xx:xx"


play.yml
---
- hosts: all
tasks:
- include: mac.yml
with_items: "{{ ansible_interfaces }}"


--
Kai Stian Olstad

[Don Jackson]

This worked great, thank you!

For the record, here is the current version of my test playbook:

- hosts: foo.example.com

  vars:

    target_macaddr: "0c:c4:7a:17:9a:94"

  tasks:

    - debug:

        var: hostvars[inventory_hostname]['ansible_' + item].device

      when: hostvars[inventory_hostname]['ansible_' + item].macaddress is defined and hostvars[inventory_hostname]['ansible_' + item].macaddress == target_macaddr

      with_items: '{{ ansible_interfaces }}'

Which prints out the device whose macaddr is the target.