Hi konstantin,
There is a non-default re-sync functionality available in the openflow plugin. 
If you use this, you should be in a position to restart the controller, or a 
compute in any order (at least from a netvirt and related features perspective)
Tunnel deletes are not well handled today, I,e if you remove a switch, and 
delete a tep in the controller, the system goes out of sync, we are adding an 
ovsdb re-sync feature in fluorine mainly for this usecase, but if you are not 
changing config, it should not block you currently.
I would suggest you enable the resync, and report any issues found to the group.

Thanks,
daya

-----Original Message-----
From: [email protected] 
[mailto:[email protected]] On Behalf Of Konstantin 
Agouros
Sent: Wednesday, April 25, 2018 2:05 AM
To: odl netvirt dev <[email protected]>
Subject: [netvirt-dev] Proper way to shutdown and restart everything?

Hi,

I am under the impression that the whole system is not resilient to a proper 
shutdown/restart of the whole ensemble. So is the proper way to first shutdown 
the compute nodes and then ODL or the other way around?
Also: Should the tunnels-ports on the compute nodes be left as be or deleted 
before starting again? At the moment I get an inconsistent state, where VMs on 
some compute nodes have network and others not.

Thanks,

Konstantin
--
Dipl-Inf. Konstantin Agouros aka Elwood Blues. Internet: [email protected] 
Altersheimerstr. 1, 81545 Muenchen, Germany. Tel +49 89 69370185
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