Prep validations, that are run as a part of undercloud install command reports failures, when custom undercloud hostname is used.
Re-running one of enlisted undercloud preflight playbooks manually[1] returns this error:
[stack@master-validations-undercloud ~]$ validation run -i undercloud --validation undercloud-disk-space.yaml
Validation config file found: /etc/validation.cfg
+--------------------------------------+-----------------------+--------+------------+----------------+-------------------+-------------+-------------+
| UUID | Validations | Status | Host_Group | Status_by_Host | Unreachable_Hosts | Duration | Reasons |
+--------------------------------------+-----------------------+--------+------------+----------------+-------------------+-------------+-------------+
| 68d66ba3-542a-4420-9269-928d3b4d70cc | undercloud-disk-space | FAILED | undercloud | undercloud | undercloud | 0:00:24.641 | Unreachable |
+--------------------------------------+-----------------------+--------+------------+----------------+-------------------+-------------+-------------+
The problem is that this playbook and majority of other playbooks use undercloud as a host[2]. However, before undercloud install it works only if node hostname is set exactly to undercloud or /etc/hosts file has additional entry as such `127.0.0.1 undercloud`.
Steps to reproduce
==================
1.Provision node that will serve as a undercloud node.
2.Set the undercloud_hostname option in order to use custom hostname(master-validations-undercloud) in undercloud.conf as suggested in docs.[3]
3.Run openstack undercloud install
[1]https://opendev.org/openstack/python-tripleoclient/src/branch/master/tripleoclient/v1/undercloud_preflight.py#L92
[2] https://opendev.org/openstack/tripleo-validations/src/branch/master/playbooks/undercloud-disk-space.yaml#L2
[3]https://docs.openstack.org/project-deploy-guide/tripleo-docs/latest/deployment/install_undercloud.html
Expected result
===============
Custom hostname option from undercloud.conf should be taken into account when pre undercloud install validations are run.
Fix proposed to branch: master
Review: https:/