[ovs-discuss] why 'ovs-vsctl add-port br dev' DO NOT check dev is really exist or not ?
Ben Pfaff
blp at nicira.com
Mon Apr 27 15:40:35 UTC 2015
When you configure ovs-vsctl to connect remotely with --db= and
configure the remote ovsdb-server to listen with --remote or "ovs-appctl
-t ovsdb-server ovsdb-server/add-remote".
On Mon, Apr 27, 2015 at 11:36:58PM +0800, ZY wrote:
> Thank you Ben
> In what kind of scenario, ovs-vsctl will run on a different machine as ovs-vswitchd ? How dose ovs-vsctl connect to the remote ovsdb server?
> A example will really help. Great appreciate
>
>
> Best Regards
>
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>
> At 2015-04-27 23:12:09, "Ben Pfaff" <blp at nicira.com> wrote:
> >On Mon, Apr 27, 2015 at 08:02:01PM +0800, ZY wrote:
> >> Reproduce
> >> 1. VM-1 is binding with tap: tape502841a-f4
> >> 2. when machine reboot, OVS service is down first and the info of tape502841a-f4 is store in ovs-db
> >> 3. libvirt destory the instance and delete tape502841a-f4
> >> 4. machine start and bootup the OVS service, OVS read the ovs-db and will add-port br-int tape502841a-f4, but failed to add into datapath because tape502841a-f4 is not create yet.
> >
> >There's no "add-port" happening, it's just that the database still has
> >the same contents as before reboot.
> >
> >> 5. libvirt start instance and create tape502841a-f4
> >> 6. the network service of instance is not work because of tape502841a-f4 is not in datapath
> >>
> >>
> >> This lead to the PORT is different between ovs-db and ovs-datapath, and i have to restart ovs service to make it work.
> >> I am wonder why OVS do not check the DEV is really exist in system first when run 'ovs-vsctl add-port BRIDGE DEV' ? and How to solve this problem?
> >
> >ovs-vsctl is just a database interface. It doesn't know anything about
> >your system interface; in general, it cannot, because it does not
> >necessarily run on the same machine as ovs-vswitchd.
> >
> >You might want to configure OVS to remove all the bridges on reboot.
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