instack-undercloud/releasenotes/notes/relax-validation-for-ui-f27...

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---
fixes:
- |
Previously, when an IP value was provided for the undercloud_public_host
or undercloud_admin_host config value, it was validated to ensure it fell
within the network_cidr. This was to avoid problems when the CIDR was
changed but the IPs were not. However, this validation was broken for a
time in the case where generate_service_certificate was used. During this
time, the UI began to depend on the broken validation as it needs to
listen on a routable network, which the provisioning network often is not.
When the validation was fixed, the user was no longer able to configure
the host values to listen on a different routable network.
To enable this UI functionality again, the host validation has been
disabled when enable_ui is true. This means the user is responsible for
selecting functional host values, but the UI can once again be configured
to listen on a separate network.