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ansibleansible-inventory

How can I get the sequence number of host entry defined in inventory file (Ansible)?

I have an inventory file with two hosts defined as below

[testservers]
xx.xx.xx.106 ansible_ssh_user=johndoe
xx.xx.xx.138 ansible_ssh_user=johndoe
xx.xx.xx.141 ansible_ssh_user=johndoe

I want to use the sequence number of defined hosts inside the tasks. Like for xx.xx.xx.106 I should get the sequence 1, for xx.xx.xx.141 I should get the sequence value as 3 since its the third entry.

How do I get this sequence number of host entry defined in inventory file without defining additional variables?

Solution

  • You can use standard Python's index method.

    Replace strings with variables below:

    debug:
  msg: "{{ groups['testservers'].index('xx.xx.xx.141') + 1 }}"

    (+1 because you explicitly asked for a sequence from 1 to 3, but index starts with 0)