Possible to loop over conditional variables?

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1

Hi all, I’m pretty new to Ansible but trying to learn quickly. I was building a role and wanted to perform a check for required variables, and was trying to put them in a loop instead of individually. Here is what I am trying but I keep getting errors:

`

  • name: Check for requirement variables
    fail: msg=“Bailing out. This role requires {{ item }}”
    when: {{ item }} is undefined
    with_items:
  • nginx_domain
  • nginx_port

`

Instead of having declare them individually like this:

`

  • name: Check for requirement nginx_domain
    fail: msg=“Bailing out. This role requires ‘nginx_domain’”
    when: nginx_domain is undefined

  • name: Check for requirement nginx_port
    fail: msg=“Bailing out. This role requires ‘nginx_port’”
    when: nginx_domain is undefined

`

Is this possible? Or am I trying to fit a square peg in a round hole?

Thanks for any feedback

– BrianH

2

when executes inside the loop so it cannot prevent undefined errors,
the following does a union of the lists but makes sure to default each
to an empty list in case they are undefined:

with_items:"{{nginx_domain|default()|union(nginx_port|default())}}"

3

Thanks for the feedback, it took a bit for me to understand. I think I might be better off declare them individually in my example since that is much easier for other to read and add to and I can see possible text errors with all the brackets and parens that have to be used for each additional item. (say I wanted to add 3 more variables to check)