Comment 9 for bug 1983718

* "127.0.0.1" entry in resolv.conf comes during deployment, we have this entry in standalone_parameters.yaml.txt [1]. We create standalone_parameters.yaml using below Jinja file [2] based on `undercloud_undercloud_nameserver` var.

We use standalone.yml[3] for standalone deployment which is basically symlink to multinode.yml and `undercloud_undercloud_nameserver` var is defined in multinode.yml[4].

We need to investigate on why 127.0.0.1 was added in `undercloud_undercloud_nameserver` var and if it can be removed/other possible solutions.

[1] https://logserver.rdoproject.org/48/38348/38/check/periodic-tripleo-ci-centos-9-scenario001-standalone-wallaby/70fd0da/logs/undercloud/home/zuul/standalone_parameters.yaml.txt.gz
~~~
  DnsServers: ["127.0.0.1", "1.1.1.1"]
~~~
[2] https://opendev.org/openstack/tripleo-quickstart-extras/src/branch/master/roles/standalone/templates/standalone_config.yaml.j2#L20
~~~
  DnsServers: {{ undercloud_undercloud_nameservers | to_json }}
~~~

[3] https://github.com/openstack/tripleo-ci/blob/master/toci-quickstart/config/testenv/standalone.yml
~~~
lrwxrwxrwx. 1 sandeepyadav sandeepyadav 13 Aug 26 09:46 standalone.yml -> multinode.yml
~~~

[4] https://opendev.org/openstack/tripleo-ci/src/branch/master/toci-quickstart/config/testenv/multinode.yml#L36

~~~
undercloud_undercloud_nameservers:
  - 127.0.0.1
  - 1.1.1.1
~~~