Use variables in standard loops

[Vikas Kumar]

I am trying to user variables in the below example described here.

- name: add several users 
  user: name={{ item.name }} 
  state=present groups={{ item.groups }} 
  with_items: 
    - { name: 'testuser1', groups: 'wheel' } 
    - { name: 'testuser2', groups: 'root' }

This works fine, but when I try to infuse variables, it does not works as intended. I am sure, I am doing something wrong.

I've defined two lists in my playbook

  vars:
    - old:
        - ens155
        - ens160
    - new:
        - eth0
        - eth1

I am trying to make below code work like ens155 is eth0 and ens160 is eth1, but this code shows this message - [ens155, ens160] is [eth0, eth1]

- shell: echo {{ item.old }} is {{ item.new }}
    with_items:
      - { old: '{{ old }}', new: '{{ new }}' }

How can I make this work ? If required, I am happy to change the way my variables are defined.

Regards.

[Alwin Schoemaker]

The injected old and new are injected as an array. Try it like this:

- shell: echo {{ item.old }} is {{ item.new }}

    with_items:

      - { old: '{{ old[0] }}', new: '{{ new[0] }}' }

      - { old: '{{ old[1] }}', new: '{{ new[1] }}' }

[Vikas Kumar]

Thanks Alwin, the number of elements in the list could vary.  

This is what I was looking for.

    - shell: echo {{ item.0 }} is {{ item.1 }}
      with_together:
        - "{{ old }}"
        - "{{ new }}"

Regards.