Description of problem:

During the step 6.1[1] cu. is getting the following errors, director is trying to delete all the networks:

...
overcloud3.Networks.TenantNetwork.TenantSubnet:
  resource_type: OS::Neutron::Subnet
  physical_resource_id: d5ca764d-80dc-4394-9cbe-590e79e7fd6f
  status: DELETE_FAILED
  status_reason: |
    Conflict: resources.TenantSubnet: Unable to complete operation on subnet d5ca764d-80dc-4394-9cbe-590e79e7fd6f: One or more ports have an IP allocation from this subnet.
...

I did check the templates, networking config is updated correctly, noyt using custom roles_data so nothing modified there.

These are the commands used:

Overcloud deploy:

time openstack overcloud deploy \
--stack overcloud1 \
--templates /home/stack/templates/openstack-tripleo-heat-templates \
-e openstack-tripleo-heat-templates/environments/network-isolation.yaml \
-e openstack-tripleo-heat-templates/environments/puppet-ceph-external.yaml \
-e rhel-registration/environment-rhel-registration.yaml \
-e rhel-registration/rhel-registration-resource-registry.yaml \
-e network-environment.yaml \
--timeout 120 | tee overcloud_install.log


Ffw-update:

openstack overcloud ffwd-upgrade prepare \
    --stack overcloud1 \
    --templates /home/stack/templates/openstack-tripleo-heat-templates \
    -e /home/stack/templates/overcloud_images.yaml \
    -e openstack-tripleo-heat-templates/environments/network-isolation.yaml \
    -e openstack-tripleo-heat-templates/environments/puppet-ceph-external.yaml \
	-e network-environment.yaml


One strange thing is that there is no references on temp files generated by director of the network-environment.yaml  so if I do a grep -R ExternalNetCidr *  I only find the default values.


[1] https://access.redhat.com/documentation/en-us/red_hat_openstack_platform/13/html/fast_forward_upgrades/assembly-upgrading_the_overcloud#performing_the_fast_forward_upgrade_of_the_overcloud


Version-Release number of selected component (if applicable):
OSP10 - OSP13


How reproducible:
Always



Actual results:
Errors specified above

Expected results:
no errors