'hostvars' is undefined

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1

Encountered below error:

ERROR! the field ‘hosts’ has an invalid value, which appears to include a variable that is undefined. The error was: ‘hostvars’ is undefined
I am using below command to define hosts value:

  • hosts: “{{ ‘prod-app-servers’ if hostvars[‘127.0.0.1’].result.stdout == ‘prod’ else ‘dr-app-servers’ }}”

I have tried different possibilities but of no use:

  • hosts: “{{ ‘prod-app-servers’ if hostvars[‘127.0.0.1’][result].stdout == ‘prod’ else ‘dr-app-servers’ }}”

I have tried below jinja format aswell, but of no use…

{% if {{hostvars[127.0.0.1][result][stdout]}} == prod %}prod-app-servers{% else %}dr-app-servers{% endif %}

My intention is to decide host during runtime based on a result.

I am not sure what is the mistake. prod-app-servers & dr-app-servers are the host groups that i defined in inventory file. ‘result’ is the value that gets populated at the begining of the playbook execution:

  • hosts: 127.0.0.1
    connection: local
    gather_facts: no
    tasks:
  • name: Check Failover or Failback
    command: --Executing a script file with some parameters–
    register: result

It fails on the syntax check, however the playbook run fine as expected.

2

This will only work if both play is in the same playbook, you error message indicate that this is not the case.

3

Hi,
Thanks for your reply.

All the plays are in same playbook.

My script is something like below:

  • hosts: 127.0.0.1
    connection: local
    gather_facts: no
    tasks:

  • name: Execute script
    command:
    register: result

  • hosts: “{{ ‘prod-app-servers’ if hostvars[‘127.0.0.1’].result.stdout == ‘prod’ else ‘dr-app-servers’ }}”
    gather_facts: no
    tasks:

  • name: Stop IIS
    win_command: iisreset /stop

As mentioned earlier, my script works as expected during execution but it throws error during syntax check.

Thanks