using inventory group name as var?

[Matthew Arguin]

I am sure that i am just glossing over this in the documentation, but here goes anyway:

i am tryingto identify how i can use a hosts group name

host_group_1:

   host1:

   host2:

in such a way that i can call it in a task and use the actual name of the group as a variable.

if i run a playbook against host1 from above and  have a task that does a lineinfile on /etc/somefile:

line1

line2

line3

lineX

the line that i am inserting would be "host_group_1" that i would do an insertbefore "lineX"

i am trying to avoid for every host group, having some variable with the same name as the host group.  seems silly, redundant and avoidable.  I am guessing that i am just not searching for the right thing in the documentation.  any pointers?

[Claudia de Luna]

Hi Matthew,

Not sure if this is what you are looking for but I use the host group name to create a custom directory to store files (basically show command output from network devices).

I use the ansible facts group_name list which gives a list of all the groups to which the host belongs.  In my case each hosts belongs to just a single group so that list will contain one element which I reference as you see by group_names[0] and use it to build my custom directory (which I also time stamps so I get something like logs_cisco_2019-05-13 as my directory).   You do have to gather facts which might make your run a bit longer.

group_names is one of the Ansible "Magic" Variables and you can read more about those here:
https://docs.ansible.com/ansible/latest/reference_appendices/special_variables.html

group_names

List of groups the current host is part of

- hosts: cisco

  gather_facts: yes

- name: Create Directory
      file:
        path: ./logs_{{ group_names[0] }}_{{ ansible_date_time.date }}
        state: directory

Not sure thats what you were looking for but thought I would suggest on the off chance it is.

[Matthew Arguin]

ha..that did the trick! 

thanks

-m

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