CODEWITHSUNDEEP
variablesansible
Vincenzo Pii
Vincenzo Pii

Reputation: 19805

Generate a variable for a role in an ansible play

My objective is to dynamically generate a list of dictionaries and use it for a role I need.

I've managed to generate the variable, but now I cannot pass it to the role.

This is my play:

- hosts:
   - some-hosts
  tasks:
    - name: create zkh var
      vars:
        zkh: []
      set_fact:
        zkh: "{{ zkh + [ {'host': item.1, 'id': item.0} ] }}"
      with_indexed_items: "{{ groups.some-hosts }}"
  roles:
    - {role: ansible-zookeeper, zookeeper_hosts: "{{ zkh }}" }

In the task I generate my variable, but then I cannot pass it to the role as (I imagine), I cannot access the scope where it is defined ("AnsibleUndefinedVariable: ERROR! ERROR! 'zkh' is undefined"}).

Defining a play-level variable and having a new task to assign it with set_fact and the value of zkh doesn't help.

How can I fix this?

Upvotes: 0

Views: 558

Answers (2)

shaps
shaps

Reputation: 1179

You should use pre_tasks to define variables needed in a role. pre_tasks are just a list of tasks that are executed before applying a role.

You also have post_tasks, if you need to do something after applying roles.

Upvotes: 1

Arbab Nazar
Arbab Nazar

Reputation: 23771

Can you try this playbook structure:

- hosts: 
    - some-hosts
  tasks:
    - name: create zkh var
      vars:
        zkh: []
      set_fact:
        zkh: "{{ zkh + [ {'host': item.1, 'id': item.0} ] }}"
      with_indexed_items: "{{ groups.some-hosts }}"
    - {role: ansible-zookeeper, zookeeper_hosts: "{{ zkh }}" }

I am assuming that your set_fact are working properly.

Upvotes: 0

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