/etc/resolv.conf facts

[ahuffman]

Build a fact collector for /etc/resolv.conf that has data structure similar to https://github.com/ahuffman/ansible-resolv.

Preferably the facts would reside under ansible_facts['resolv.conf']: with dictionaries for nameservers, domain, search, and options.

[bleung]

This is already available as an ansible fact under ansible_dns

[bleung@bleung ~]$ ansible localhost -m setup | grep -A10 ansible_dns
        "ansible_dns": {
            "nameservers": [
                "192.168.1.1"
            ],
            "search": [
                "home"
            ]
        },
        "ansible_domain": "home",
        "ansible_effective_group_id": 1000,
        "ansible_effective_user_id": 1000,

[ahuffman]

Not exactly all of it though. We want to gather the /etc/resolv.conf similar to the structure found in this role: https://github.com/ahuffman/ansible-resolv

[bleung]

I created a more extensive resolv.conf as an example and checked the ansible facts. This is what I get:

[bleung@bleung workspace]$ cat /etc/resolv.conf
# Generated by NetworkManager
search fios-router.home example.com
nameserver 192.168.1.1
nameserver 8.8.8.8
nameserver 8.8.4.4
domain example.com
options rotate timeout:1
sortlist 
[bleung@bleung workspace]$ ansible localhost -m setup | grep -A17 ansible_dns
        "ansible_dns": {
            "domain": "example.com",
            "nameservers": [
                "192.168.1.1",
                "8.8.8.8",
                "8.8.4.4"
            ],
            "options": {
                "rotate": true,
                "timeout": "1"
            },
            "search": [
                "fios-router.home",
                "example.com"
            ],
            "sortlist": []
        },
        "ansible_domain": "",

My understanding of resolv.conf is pretty basic, but does this look more like what you're trying to gather from a server?

[ahuffman]

Yes actually. I had not noticed this was a built-in fact. It's pretty close to what I would want to gather. The only thing I do not like is the way that the options come out as a dictionary, which makes it slightly more difficult to template out, but I can work with it for the most part. I'd prefer the options to come out as a list with just:

options:
  - rotate
  - timeout:1

Maybe a PR on the Ansible project would be a good approach for this one.