# Use hostnames from ansible group into template

**URL:** <https://forum.ansible.com/t/use-hostnames-from-ansible-group-into-template/14754>\
**Category:** Ansible Project\
**Created:** [March 11, 2014, 5:21am UTC](https://forum.ansible.com/t/use-hostnames-from-ansible-group-into-template/14754 "2014-03-11T05:21:38Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Petr\_Sukharev](https://avatars.discourse-cdn.com/v4/letter/p/3ab097/32.png) [@Petr\_Sukharev](https://forum.ansible.com/u/Petr_Sukharev)\
**Post date:** [March 11, 2014, 5:21am UTC](https://forum.ansible.com/t/use-hostnames-from-ansible-group-into-template/14754/1 "2014-03-11T05:21:38Z")

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Hi!  
Does anybody know solution for scenario like this:  
i have template (sudoers file with host list) like this

Host\_group = host1, host2, host3  
Host\_group = host4, host5, host6  
Host\_group = host7, host8, host9

And host file like this:  
[app]  
host1  
host2  
host3

[db]  
host4  
host5  
host6

[other]  
host7  
host8  
host9

How can i use variable with host list from hosts file? Like this:

Host\_group = {{ app }}  
Host\_group = {{ db }}

I add some host in hosts file and it will be automatically insert into this variable. Does it real?

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**Author:** ![Tomasz\_Lesniewski](https://avatars.discourse-cdn.com/v4/letter/t/7ab992/32.png) [@Tomasz\_Lesniewski](https://forum.ansible.com/u/Tomasz_Lesniewski)\
**Post date:** [March 11, 2014, 8:09am UTC](https://forum.ansible.com/t/use-hostnames-from-ansible-group-into-template/14754/2 "2014-03-11T08:09:01Z")

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You mean:

Host\_group = {{ groups[‘app’] | join(‘,’) }}  
Host\_group = {{ groups[‘db’] | join(‘,’) }}

?

W dniu wtorek, 11 marca 2014 06:21:38 UTC+1 użytkownik Petr Sukharev napisał:

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**Author:** ![Petr\_Sukharev](https://avatars.discourse-cdn.com/v4/letter/p/3ab097/32.png) [@Petr\_Sukharev](https://forum.ansible.com/u/Petr_Sukharev)\
**Post date:** [March 11, 2014, 10:37am UTC](https://forum.ansible.com/t/use-hostnames-from-ansible-group-into-template/14754/3 "2014-03-11T10:37:48Z")

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Exactly! Thanks for you help.