I installed

* CentOS

* Master repo for ovirt

* create ovirtmgmt bridge via network scripts (not virbr0)

* installed VDSM

* installed cockpit

* installed cockpit-ovirt-dashboard.noarch

i suspect the virbr0 came from installing the cockpit-ovirt-dashboard.noarch components as it also installed a whole host of stuff like virt-manager-common.noarch

Anyway this causes the hosted ovirt-engine vm install to fail from cockpit as

"[ ERROR ] fatal: [localhost]: FAILED! => {"changed": false, "msg": "hostname 'host-141' doesn't uniquely match the interface 'enp3s0' selected for the management bridge; it matches also interface with IP [u'192.168.122.1']. Please make sure that the hostname got from the interface for the management network resolves only there.\n"}"

-----------

[sysadmin@host-141 ~]$ ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: enp3s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master ovirtmgmt state UP group default qlen 1000
    link/ether e0:d5:5e:73:ad:5e brd ff:ff:ff:ff:ff:ff
    inet6 fe80::e2d5:5eff:fe73:ad5e/64 scope link
       valid_lft forever preferred_lft forever
18: ovirtmgmt: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether e0:d5:5e:73:ad:5e brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.141/24 brd 192.168.1.255 scope global ovirtmgmt
       valid_lft forever preferred_lft forever
    inet6 fe80::e2d5:5eff:fe73:ad5e/64 scope link
       valid_lft forever preferred_lft forever
19: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
    link/ether 52:54:00:e5:0d:40 brd ff:ff:ff:ff:ff:ff
    inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
       valid_lft forever preferred_lft forever
20: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast master virbr0 state DOWN group default qlen 1000
    link/ether 52:54:00:e5:0d:40 brd ff:ff:ff:ff:ff:ff

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