with_nested with range()

[Łukasz Górski]

Hi,

I need to create a nested loop referencing a variable from the outer loop. Basically something along the lines of:

hosts = [{'name': 'first', 'limit': 3}, {'name': 'second', 'limit': 5}]

for host in hosts:

    for i in range(1, host['limit'] + 1):

        print('%s-%d' % (host['name'], i))

For all I see it's not quite possible using with_nested or with_subelements (how do I refer to the item coming from the first loop?). I cannot enumerate all the items, they are simple int values, but their numer may be quite large.

Is there something to the built-in loops I am missing which could possibly help me using range() with limit coming from a dictionary from the first loop/data set?

Thanks in advance for any tips.

--

Łukasz Górski
Administrator Systemu Linux
e-mail: l.go...@trojmiasto.pl
Tel. 058 321 95 65 Kom.

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[Kai Stian Olstad]

On 19. des. 2016 14:47, Łukasz Górski wrote:
> I need to create a nested loop referencing a variable from the outer loop.
> Basically something along the lines of:
>
> hosts = [{'name': 'first', 'limit': 3}, {'name': 'second', 'limit': 5}]
> for host in hosts:
> for i in range(1, host['limit'] + 1):
> print('%s-%d' % (host['name'], i))
>
> For all I see it's not quite possible using with_nested or with_subelements
> (how do I refer to the item coming from the first loop?). I cannot
> enumerate all the items, they are simple int values, but their numer may be
> quite large.
>
> Is there something to the built-in loops I am missing which could possibly
> help me using range() with limit coming from a dictionary from the first
> loop/data set?

Check out loop_control
https://docs.ansible.com/ansible/playbooks_loops.html#loop-control

hosts.yml
---
- debug: msg="{{ outer_item.name }}-{{ item }}"
with_sequence: start=1 end={{ outer_item.limit }}

playbook.yml
- hosts: localhost
vars:
hosts:
- name: 'first'
limit: 3
- name: 'second'
limit: 5

tasks:
- include: hosts.yml
with_items: "{{ hosts }}"
loop_control:
loop_var: outer_item

--
Kai Stian Olstad

[Łukasz Górski]

Thank you! It gets the job done nicely indeed.

Best regards,

--
Kai Stian Olstad

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