On Wed, Sep 27, 2017 at 4:04 PM, Michael Burman <mburman@redhat.com> wrote:

Hello Gianluca,

This is not the right flow. If you would like to have any other network in your cluster as the management network, then you need to create it as the management network of the cluster and then add hosts to the cluster, then the new network which was defined as the management network of the cluster will be the management network of the host/s in the cluster.

The correct flow will be :

1) Create new network for example - 'net1-mgmt'

2) Give 'net1-mgmt'  a management role via manage networks, it can be done via networks>clusters flow or via Cluster>logical networks flow(note that management network must be required and attached)

3) Create cluster and choose 'net1-mgmt' as the management network of the cluster

3) Add/install the host in the cluster

See also - https://www.ovirt.org/develop/release-management/features/network/management-network-as-a-role/

It's a network feature since 3.6

Cheers)

OK.

But what if the hosts already existed before?

Can I 

1) delete host from engine gui 

2) remove ovirt packages from host

3) verify also /var/lib/vdsm is removed

4) reboot host and verify all ok as a standalone server 

5) add the host to the engine

Will step 5) have problems because y host is sort-of-already-known by the engine before?

Also, is it expected that if I set another network as mgmt one for a cluster, still I cannot remove the default ovirtmgmt network from that cluster?  

Thanks

Gianluca