Comment 9 for bug 1924751

Reviewed: https://review.opendev.org/c/openstack/tripleo-heat-templates/+/787327
Committed: https://opendev.org/openstack/tripleo-heat-templates/commit/0f1230d0b5535959a53fbe04a0ec31441eae29f8
Submitter: "Zuul (22348)"
Branch: master

commit 0f1230d0b5535959a53fbe04a0ec31441eae29f8
Author: Brendan <email address hidden>
Date: Wed Apr 21 18:39:33 2021 +1000

    Add RootStackName to group_vars

    After a Overcloud deployment, /etc/hosts on the undercloud
    will be populated with entries for each overcloud node. Since
    we use the same tripleo_ansible roles for both the undercloud
    and overcloud deployment, the /etc/hosts file on the Director
    will be removed by undercloud install / upgrade operations.

    This is outlined here:
    https://bugzilla.redhat.com/show_bug.cgi?id=1933528

    This change adds the RootStackName to the group_vars,
    this is then used by the tripleo_host_entries role in
    tripleo-ansible to write host entries per stack.

    Closes-Bug: #1924751
    RHBZ: 1933528
    Change-Id: I9e53187f37d41d7180e66db1239b5f9c8846addd