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

[Moti Asayag]

----- Original Message -----
> From: "Arman Khalatyan" <arm2arm at gmail.com>
> To: "Moti Asayag" <masayag at redhat.com>
> Cc: "users" <users at ovirt.org>
> Sent: Monday, December 29, 2014 3:59:46 PM
> Subject: Re: [ovirt-users] Unable to reinstall hosts after network removal.
> 
> My setup  has 3 networks: 1xIB,1x10Gbit+1Gbit for ovirt-management.
> The ovirt network does not have any trouble, it is always there.
> I was trying to rename or remove my IB network which was used for VM
> migrations.
> I was using web-GUI, which was removing IB0 network w/o problem. After
> removal the hosts where ok. 

Have you checked the option of "save network configuration" in the setup networks
dialog (iirc should have been checked by default) ? 

Could you also attach the /var/log/ovirt-engine/engine.log from the engine server
and /var/log/vdsm/vdsm.log and /var/log/vdsm/supervdsm.log from the node so
we can see which request was sent to vdsm and its result ? 

> Then I put them to maintenance mode. To refresh
> iptables rules I did reinstall. then reinstall was failing with message
> that IB0 not attached to any interface. But IB0 interface is not possible
> to attach it is already deleted and not visible in any network dialog.
> After creating interface with the same name everything is online now.
> My current interface list is following:
>  virsh -r net-list
> Name                 State      Autostart     Persistent
> --------------------------------------------------
> ;vdsmdummy;          active     no            no
> vdsm-cls10G          active     yes           yes
> vdsm-IB0             active     yes           yes
> vdsm-ovirtmgmt       active     yes           yes
> 
> On this host the IB0 is not atached to any interface, I wondered, if it
> should show up  in the net list?
> 
> I think the GUI does not rename/remove the interface from the DB. Some
> constrain keeps still IB0 in DB.
> 
> 
> 
> ***********************************************************
> 
> Dr. Arman Khalatyan eScience -SuperComputing Leibniz-Institut für
> Astrophysik Potsdam (AIP) An der Sternwarte 16, 14482 Potsdam, Germany
> 
> ***********************************************************
> 
> 
> On Sun, Dec 28, 2014 at 10:31 AM, Moti Asayag <masayag at redhat.com> wrote:
> 
> >
> >
> > ----- 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
> > > ***********************************************************
> > >
> > > _______________________________________________
> > > Users mailing list
> > > Users at ovirt.org
> > > http://lists.ovirt.org/mailman/listinfo/users
> > >
> >
>