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

[Lior Vernia]

I think pressing the "Refresh Capabilities" button at the hosts main tab
might help after you remove the IB interface - this forces the engine to
update its DB state to what's reported by the hypervisor. Then I would
expect things to work better...

On 29/12/14 15:59, Arman Khalatyan wrote:
> 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. 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
> <mailto:masayag at redhat.com>> wrote:
> 
> 
> 
>     ----- Original Message -----
>     > From: "Arman Khalatyan" <arm2arm at gmail.com <mailto:arm2arm at gmail.com>>
>     > To: "users" <users at ovirt.org <mailto: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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>     >
> 
> 
> 
> 
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