[ovs-discuss] OVS controller reconnection on XenServer reboot

Justin Pettit jpettit at nicira.com
Tue May 3 02:09:54 UTC 2011

On May 2, 2011, at 3:00 PM, Ben Pfaff wrote:

> On Mon, May 02, 2011 at 02:51:14PM -0700, David Erickson wrote:
>> I've noticed that OVS isn't connecting to the controller on
>> boot/reboot, is there an option somewhere I need to set to enable
>> this?  On further inspection when I run ovs-vsctl list bridge it
>> looks like the bridge lost both its controller entry and its
>> other_config:datapath-id.  Is there a persist or save command I need
>> to issue after setting these things?
> What happens at boot is this:
> 	* OVS tears down and destroys all bridges, because XenServer
>          expects to re-create each one at boot.
> 	* OVS refreshes the manager (OVSDB connection) from the
>          XenServer (XAPI) database.
> 	* XenServer creates each of the bridges.  No controller is
>          set.
> 	* The manager is supposed to set the controller for each
>          bridge as it likes, using the OVSDB connection to do so.

I answered a very similar question a couple of weeks ago, and described a couple different possible solutions:



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