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

Wed Dec 28 13:25:35 UTC 2016

I have tried various variants to create an interface with the dummy 
driver, currently I have an interface dummy0 which is assigned to a 
legacy bridge ovirtmgmt but ovirt-engine doesn't see those neither.
/Sverker

Den 2016-12-28 kl. 12:06, skrev Marcin Mirecki:
>> 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:
>>>>
>>>>
>>