my playbook looks like
<code>- hosts: web:back:front
serial: "{{ groups[group_names[0]] | length }}"
</code>
<code>- hosts: web:back:front
serial: "{{ groups[group_names[0]] | length }}"
</code>
- hosts: web:back:front
serial: "{{ groups[group_names[0]] | length }}"
when i execute, it doesn’t seem to work as the error points out that group_names variable is undefined
How can i get the serial value to match the number of hosts in the current group ?
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