Created attachment 1340650 [details]
Description of problem:
Cluster can be created with empty 'Default network provided', which is causing host deploy process to fail with 'Failed to configure management network on the host' and NPE is shown in the logs.
The cause of that is most probably that 'Default network provided' combo box is empty, so no value can be set into it
Version-Release number of selected component (if applicable):
master, Change-Id: I4b5338e4faa5e5dd36872a4772f86dca809a37bb
Steps to Reproduce:
1. Create a new cluster using webadmin (no value can be set in 'Default network provided' combo box)
2. Try to add a host into that cluster
Cluster can be created with no value in 'Default network provided', which causes host deploy to fail
Cluster cannot be created without 'Default network provided' value
 is the patch is causing that issue, with engine before that change everything works fine.
This bugzilla is included in oVirt 4.2.0 release, published on Dec 20th 2017.
Since the problem described in this bug report should be
resolved in oVirt 4.2.0 release, published on Dec 20th 2017, it has been closed with a resolution of CURRENT RELEASE.
If the solution does not work for you, please open a new bug report.