Description of problem:

With https://bugzilla.redhat.com/show_bug.cgi?id=1416639 (3.10) and https://github.com/openshift/openshift-ansible/pull/7920 (backport to 3.9.1)
we introduce blocking installation or upgrading of metrics, logging, registy,....  if located on NFS unless openshift_enable_unsupported_configurations=True is set in the hosts file.

Testing this is in lab showed that metrics and logging indeed stop and end with a warning but to my understanding it should actually even not be possible to upgrade at all because of the registry on NFS, which was not the case.

Version-Release number of selected component (if applicable):

oc v3.9.27
kubernetes v1.9.1+a0ce1bc657
features: Basic-Auth GSSAPI Kerberos SPNEGO

Server https://openshift.internal.example.com:443
openshift v3.9.27
kubernetes v1.9.1+a0ce1bc657


openshift-ansible-playbooks-3.9.27-1.git.0.52e35b5.el7.noarch
ansible-2.4.4.0-1.el7ae.noarch
openshift-ansible-roles-3.9.27-1.git.0.52e35b5.el7.noarch
openshift-ansible-3.9.27-1.git.0.52e35b5.el7.noarch
openshift-ansible-docs-3.9.27-1.git.0.52e35b5.el7.noarch

How reproducible:

Steps to Reproduce:
1. Install latest version of OCP 3.7 with registry, metrics, logging and asb on NFS
2. One the installation is working, follow docs to update to lastest, i.e. 3.9.1 OCP 
3. According to my understanding of bz 1416639 that should fail with a warning for registry on NFS and a hint that I would need to set openshift_enable_unsupported_configurations=True, which is not the case
4. However, updating metrics or logging shows the warning and installation fails

Actual results:
- OCP 3.9.1 installs without a warning for registry on NFS

Expected results:
- Fails with warning because of NFS for registry

Additional info:
- updating metrics logging shows:

$ ansible-playbook -i hosts_39 /usr/share/ansible/openshift-ansible/playbooks/openshift-logging/config.yml

[...]
TASK [Run variable sanity checks] ************************************************************************************************************************************************************
fatal: [10.10.10.22]: FAILED! => {"failed": true, "msg": "last_checked_host: 10.10.10.22, last_checked_var: openshift_hosted_registry_storage_kind;nfs is an unsupported type for openshift_
hosted_registry_storage_kind. openshift_enable_unsupported_configurations=True mustbe specified to continue with this configuration."}

NO MORE HOSTS LEFT ***************************************************************************************************************************************************************************
....

$ ansible-playbook -i hosts_39 /usr/share/ansible/openshift-ansible/playbooks/openshift-metrics/config.yml
[...]
TASK [Run variable sanity checks] ************************************************************************************************************************************************************
fatal: [10.10.10.22]: FAILED! => {"failed": true, "msg": "last_checked_host: 10.10.10.22, last_checked_var: openshift_hosted_registry_storage_kind;nfs is an unsupported type for openshift_hosted_registry_storage_kind. openshift_enable_unsupported_configurations=True mustbe specified to continue with this configuration."}



Description of problem:

Version-Release number of the following components:
rpm -q openshift-ansible
rpm -q ansible
ansible --version

How reproducible:

Steps to Reproduce:
1.
2.
3.

Actual results:
Please include the entire output from the last TASK line through the end of output if an error is generated

Expected results:

Additional info:
Please attach logs from ansible-playbook with the -vvv flag