[ovirt-users] Issue with OVN/OVS and mandatory ovirtmgmt network

Wed Dec 28 13:38:19 UTC 2016

Sverker,

Can you try adding a vnic named veth_* or dummy_*,
(or alternatively add the name of the vnic to 
vdsm.config fake_nics), and setup the management
network using this vnic?
I suppose adding the vnic you use for connecting
to the engine to fake_nics should make it visible
to the engine, and you should be able to use it for
the setup.

Marcin

----- Original Message -----
> From: "Marcin Mirecki" <mmirecki at redhat.com>
> To: "Sverker Abrahamsson" <sverker at abrahamsson.com>
> Cc: "Ovirt Users" <users at ovirt.org>
> Sent: Wednesday, December 28, 2016 12:06:26 PM
> Subject: Re: [ovirt-users] Issue with OVN/OVS and mandatory ovirtmgmt network
> 
> > I have an internal OVS bridge called ovirtbridge which has a port with
> > IP address, but in the host network settings that port is not visible.
> 
> I just verified and unfortunately the virtual ports are not visible in engine
> to assign a network to :(
> I'm afraid that the engine is not ready for such a scenario (even if it
> works).
> Please give me some time to look for a solution.
> 
> ----- Original Message -----
> > From: "Sverker Abrahamsson" <sverker at abrahamsson.com>
> > To: "Marcin Mirecki" <mmirecki at redhat.com>
> > Cc: "Ovirt Users" <users at ovirt.org>
> > Sent: Wednesday, December 28, 2016 11:48:24 AM
> > Subject: Re: [ovirt-users] Issue with OVN/OVS and mandatory ovirtmgmt
> > network
> > 
> > Hi Marcin
> > Yes, that is my issue. I don't want to let ovirt/vdsm see eth0 nor
> > ovsbridge0 since as soon as it sees them it messes up the network config
> > so that the host will be unreachable.
> > 
> > I have an internal OVS bridge called ovirtbridge which has a port with
> > IP address, but in the host network settings that port is not visible.
> > It doesn't help to name it ovirtmgmt.
> > 
> > The engine is able to communicate with the host on the ip it has been
> > given, it's just that it believes that it HAS to have a ovirtmgmt
> > network which can't be on OVN.
> > 
> > /Sverker
> > 
> > 
> > Den 2016-12-28 kl. 10:45, skrev Marcin Mirecki:
> > > Hi Sverker,
> > >
> > > The management network is mandatory on each host. It's used by the
> > > engine to communicate with the host.
> > > Looking at your description and the exception it looks like it is
> > > missing.
> > > The error is caused by not having any network for the host
> > > (network list retrieved in InterfaceDaoImpl.getHostNetworksByCluster -
> > > which
> > > gets all the networks on nics for a host from vds_interface table in the
> > > DB).
> > >
> > > Could you maybe create a virtual nic connected to ovsbridge0 (as I
> > > understand you
> > > have no physical nic available) and use this for the management network?
> > >
> > >> I then create a bridge for use with ovirt, with a private address.
> > > I'm not quite sure I understand. Is this yet another bridge connected to
> > > ovsbridge0?
> > > You could also attach the vnic for the management network here if need
> > > be.
> > >
> > > Please keep in mind that OVN has no use in setting up the management
> > > network.
> > > The OVN provider can only handle external networks, which can not be used
> > > for a
> > > management network.
> > >
> > > Marcin
> > >
> > >
> > > ----- Original Message -----
> > >> From: "Sverker Abrahamsson" <sverker at abrahamsson.com>
> > >> To: users at ovirt.org
> > >> Sent: Wednesday, December 28, 2016 12:39:59 AM
> > >> Subject: [ovirt-users] Issue with OVN/OVS and mandatory ovirtmgmt
> > >> network
> > >>
> > >>
> > >>
> > >> Hi
> > >> For long time I've been looking for proper support in ovirt for Open
> > >> vSwitch
> > >> so I'm happy that it is moving in the right direction. However, there
> > >> seems
> > >> to still be a dependency on a ovirtmgmt bridge and I'm unable to move
> > >> that
> > >> to the OVN provider.
> > >>
> > >> The hosting center where I rent hw instances has a bit special network
> > >> setup,
> > >> so I have one physical network port with a /32 netmask and
> > >> point-to-point
> > >> config to router. The physical port I connect to a ovs bridge which has
> > >> the
> > >> public ip. Since ovirt always messes up the network config when I've
> > >> tried
> > >> to let it have access to the network config for the physical port, I've
> > >> set
> > >> eht0 and ovsbridge0 as hidden in vdsm.conf.
> > >>
> > >>
> > >> I then create a bridge for use with ovirt, with a private address. With
> > >> the
> > >> OVN provider I am now able to import these into the engine and it looks
> > >> good. When creating a VM I can select that it will have a vNic on my OVS
> > >> bridge.
> > >>
> > >> However, I can't start the VM as an exception is thrown in the log:
> > >>
> > >> 2016-12-28 00:13:33,350 ERROR [org.ovirt.engine.core.bll.RunVmCommand]
> > >> (default task-5) [3c882d53] Error during ValidateFailure.:
> > >> java.lang.NullPointerException
> > >> at
> > >> org.ovirt.engine.core.bll.scheduling.policyunits.NetworkPolicyUnit.validateRequiredNetworksAvailable(NetworkPolicyUnit.java:140)
> > >> [bll.jar:]
> > >> at
> > >> org.ovirt.engine.core.bll.scheduling.policyunits.NetworkPolicyUnit.filter(NetworkPolicyUnit.java:69)
> > >> [bll.jar:]
> > >> at
> > >> org.ovirt.engine.core.bll.scheduling.SchedulingManager.runInternalFilters(SchedulingManager.java:597)
> > >> [bll.jar:]
> > >> at
> > >> org.ovirt.engine.core.bll.scheduling.SchedulingManager.runFilters(SchedulingManager.java:564)
> > >> [bll.jar:]
> > >> at
> > >> org.ovirt.engine.core.bll.scheduling.SchedulingManager.canSchedule(SchedulingManager.java:494)
> > >> [bll.jar:]
> > >> at
> > >> org.ovirt.engine.core.bll.validator.RunVmValidator.canRunVm(RunVmValidator.java:133)
> > >> [bll.jar:]
> > >> at
> > >> org.ovirt.engine.core.bll.RunVmCommand.validate(RunVmCommand.java:940)
> > >> [bll.jar:]
> > >> at
> > >> org.ovirt.engine.core.bll.CommandBase.internalValidate(CommandBase.java:886)
> > >> [bll.jar:]
> > >> at
> > >> org.ovirt.engine.core.bll.CommandBase.validateOnly(CommandBase.java:366)
> > >> [bll.jar:]
> > >> at
> > >> org.ovirt.engine.core.bll.PrevalidatingMultipleActionsRunner.canRunActions(PrevalidatingMultipleActionsRunner.java:113)
> > >> [bll.jar:]
> > >> at
> > >> org.ovirt.engine.core.bll.PrevalidatingMultipleActionsRunner.invokeCommands(PrevalidatingMultipleActionsRunner.java:99)
> > >> [bll.jar:]
> > >> at
> > >> org.ovirt.engine.core.bll.PrevalidatingMultipleActionsRunner.execute(PrevalidatingMultipleActionsRunner.java:76)
> > >> [bll.jar:]
> > >> at
> > >> org.ovirt.engine.core.bll.Backend.runMultipleActionsImpl(Backend.java:613)
> > >> [bll.jar:]
> > >> at
> > >> org.ovirt.engine.core.bll.Backend.runMultipleActions(Backend.java:583)
> > >> [bll.jar:]
> > >>
> > >>
> > >> Looking at that section of code where the exception is thrown, I see
> > >> that
> > >> it
> > >> iterates over host networks to find required networks, which I assume is
> > >> ovirtmgmt. In the host network setup dialog I don't see any networks at
> > >> all
> > >> but it lists ovirtmgmt as required. It also list the OVN networks but
> > >> these
> > >> can't be statically assigned as they are added dynamically when needed,
> > >> which is fine.
> > >>
> > >> I believe that I either need to remove ovirtmgmt network or configure
> > >> that
> > >> it
> > >> is provided by the OVN provider, but neither is possible. Preferably it
> > >> shouldn't be hardcoded which network is management and mandatory but be
> > >> possible to configure.
> > >>
> > >> /Sverker
> > >> Den 2016-12-27 kl. 17:10, skrev Marcin Mirecki:
> > >>
> > >>
> > 
> > 
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