[Engine-devel] [vdsm] ovirt-host-deploy and multible bridges

[Balamurugan Arumugam]

On 04/09/2013 06:37 PM, Sahina Bose wrote:
> Decoding "correct address"  - glusterHostsList should return any
> ipAddress that engine knows as being associated with host.
> It could be either ipAddress used while adding host (stored as hostname
> in vds_static) or any of the ipAddresses populated in vds_interface
> table (addr column) .
> I do not have enough knowledge about this bit of code to say what
> entries are made in vds_interface table. I know there's an entry for
> ovirtmgmt here but not sure if this gets added as part of addHost flow
> or not.
>

I guess, vds_interface table is populated by ips given by vdsm through 
getVdsCaps.

Current glusterHostsList provides one of ipaddress of the local host 
(other than 127.*.*.*).   If virbr0 is enabled, it picks up 
192.168.122.1 ip address of the bridge and sends to the engine, but this 
entry is missing in the table.

The requirement is that we need a ip of the local host which is also 
stored in the database.

The database has entries of ips of a host those are from physical nics 
and/or bridges who has slaves to nics.

Regards,
Bala


> thx
> sahina
>
> On 04/09/2013 06:05 PM, Dan Kenigsberg wrote:
>> On Tue, Apr 09, 2013 at 03:55:25PM +0530, Sahina Bose wrote:
>>> [Adding vdsm-devel]
>>>
>>> On 04/09/2013 03:40 PM, Sahina Bose wrote:
>>>> Hi all,
>>>>
>>>> I'm testing the bootstrapping of host without reboot on Fedora 18.
>>>> After
>>>> host's bootstrap,
>>>> Ifconfig output returns this:
>>>>
>>>> ovirtmgmt: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
>>>>           inet 10.70.37.219  netmask 255.255.254.0  broadcast
>>>> 10.70.37.255
>>>>     <snipped>
>>>>
>>>> virbr0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
>>>>           inet 192.168.122.1  netmask 255.255.255.0  broadcast
>>>> 192.168.122.255
>>>>          <snipped>
>>>>
>>>> Running*glusterHostsList*  vdsm verb, returns the ip address
>>>> 192.168.122.1, whereas my host has been added with ip address
>>>> 10.70.37.219
>>>>
>>>> If I reboot the host, the virbr0 bridge is removed, and there's no
>>>> issue.
>>>>
>>>> The vdsm verb glusterHostsList - returns ipAddress of host +
>>>> output of gluster peer probe. This is needed because a periodic
>>>> sync job needs to make sure that the hosts added in engine are in
>>>> sync with the gluster cli (hosts could also be added/removed from
>>>> gluster cli).
>>>>
>>>> How can we make sure glusterHostsList picks the correct ipAddress?
>> Can you define (in plain English) what is the "correct" address?
>> The host may have multiple valid addresses (storage, migration, display,
>> whatnot).
>>
>> Only when it's clear to us, we can start expressing this in Python.
>>
>>>> Reading the inetinfo based on bridge has been vetoed as we are
>>>> doing away with bridges.
>>>>
>>>> It would also work if virbr0 was updated in vds_interfaces table.
>>>> Since this is not happening either - we have an issue.
>> It might be a valid hack to drop this default virbr0 on vdsm start - not
>> only the libvirt definition thereof, but also the running kernel device.
>>
>> However, as expressed above, this would not solve your problem when you
>> have a currently-running host with multiple addresses.
>>
>> Dan.
>
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