jinja2 - loop over hosts in jinj2a template, respecting --limit -

i'm aware ansible supports loops in templates in form:

{% host in groups['all'] %}   "{{ host }}"{% if not loop.last %},{% endif %} {% endfor %} 

when run ansible, loops on in hosts file, 1 might expect.

when run ansible --limit command line argument, loop on hosts match limit. there way express loop in jinja2 templates?

you can use play_hosts variable vars, example:

{% host in vars['play_hosts'] %}   "{{ host }}"{% if not loop.last %},{% endif %} {% endfor %} 

imagine setup:

# hosts [all-hosts] ansible               ansible_ssh_host=192.168.42.2 webapp                ansible_ssh_host=192.168.42.10  postgresql            ansible_ssh_host=192.168.42.20  #playbook.yml ---  - hosts:   gather_facts: no   tasks:     - name: hosts       template: src=myhosts.j2 dest=./myhosts.json       delegate_to: 127.0.0.1       run_once: yes 

then running no limit give same result have, when specify limit produce "limited" host names:

ansible-playbook -i hosts playbook.yml --limit postgresql,ansible 

output:

"ansible",  "postgresql"