[ovirt-users] Unable to reinstall hosts after network removal.

[Moti Asayag]

----- Original Message -----
> From: "Arman Khalatyan" <arm2arm at gmail.com>
> To: "users" <users at ovirt.org>
> Sent: Wednesday, December 24, 2014 1:22:43 PM
> Subject: [ovirt-users] Unable to reinstall hosts after network removal.
> 
> Hello,
> I have a little trouble with ovirt 3.5 on CentOS6.6:
> I was removing all networks from all hosts.

Did you use the setup networks dialog from the UI in order to remove those networks ?
Or have you removed those networks from the host directly (where you should used the: 
1. virsh net-destroy 'the-network-name'
2. virsh net-undefine 'the-network-name'
)

can you report the output of 'virsh -r net-list'  ?

> Then after removing network from data center the hosts went to unusable.

What was the host's status prior to removing its networks ? Was it up ?

> Every time after reinstall the host claims that the network is not
> configured, but it s already removed from network tab in DC.

What is the missing network name ? Is it 'ovirtmgmt' ?

> Where from it gets the old configuration? the old interfaces also restored
> every time on the reinstalled hosts.

The hosts via vdsm reports their network configuration via the 'getCapabilities' verb
of vdsm. You can try running it on the host:

vdsClient -s 0 getVdsCaps 

and examine the nics / neworks / bridges / vlans / bonds elements.

> Which DB table is in charge of dc-networks?
> 

The retrieved information from vdsm is reported to 'vds_interace' table.
The dc networks are stored in 'networks' table and networks attached to
clusters are stored in network_cluster table.

I wouldn't recommend on deleting entries from the tables directly. There are
certain constraints which shouldn't be violated, i.e. the management network
'ovirtmgnt' is blocked for removal from the engine.

> Thanks,
> Arman.
> 
> 
> ***********************************************************
> Dr. Arman Khalatyan eScience -SuperComputing Leibniz-Institut für Astrophysik
> Potsdam (AIP) An der Sternwarte 16, 14482 Potsdam, Germany
> ***********************************************************
> 
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