name to IP aresolution

[Charles Brown]

Hello,

Given a list of hostnames, how would I resolve the names to IP address for use in a Jinja2 template?  I don't see a Jinja filter that performs gethostbyname lookups, and I don't see a way to do this in Ansible either.

Thanks 

[Giovanni Tirloni]

On Wed, 18 Feb 2015 15:15 -0800, Charles Brown <charl...@gmail.com>
wrote:

I don't think there is a lookup plugin for that, yet.

Not the cleanest way, but you could use register and dig:

vars:
some_ip: "8.8.8.8"
some_hostname: "google.com"

tasks:

- name: resolve some ip
command: "dig +short -x {{ some_ip }}"
register: resolved_ip

- debug:
var: resolved_ip.stdout

- name: resolve some hostname
command: "dig +short {{ some_hostname }}"
register: resolved_hostname

- debug:
var: resolved_hostname.stdout


Giovanni

[Brian Coca]

lookup('pipe','dig ' + hostname + '|grep....')

or host/nslookup/dnsip, which ever system utility you have that does the same



--
Brian Coca

[Timo]

Hi,

i am having somewhat the same problem.

But i dont find any solution to that.

I have to use lookup within a template with jinja2.

  address                       {{ lookup('dig', '({{hosts}}{{domain1}})') }}

Were hosts and domain1 are lists defined in default/main.yml

and will be used in a for loop inside the jinja2 template.

{% for hosts in hostlist1 %}

define host {

  host_name                {{hosts}}

  alias                         {{hosts}}{{domain1}}

  address                    {{ lookup('dig', '({{hosts}}{{domain1}})') }}

}

{% endfor %}

Problem: lookup ('dig', does only accept the real string. Not the variables.

So i can't use this in this template.

Any ideas how to overcome this problem?

Many thx in advance!

Timo

 

[Brian Coca]

too many moustaches!

inside {{ }} you don't stack more, variables are directly interpolated already

{{ lookup('dig', hosts + '.'+ domain1) }}

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--
Brian Coca

[Timo]

Brian,

On Monday, June 15, 2015 at 5:47:37 PM UTC+2, Brian Coca wrote:

too many moustaches!

inside {{ }} you don't stack more, variables are directly interpolated already

you' re the man!

Thx so much. 

It works now like hell!!!

That would somehow be great as an example in the documentation....

 

 

--
Brian Coca