On Thu, Jul 25, 2019 at 12:51 AM Han Zhou <[email protected]> wrote:
>
>
>
> On Mon, Jul 8, 2019 at 2:11 PM Ben Pfaff <[email protected]> wrote:
> >
> > On Mon, Jul 08, 2019 at 12:06:45PM +0200, Dumitru Ceara wrote:
> > > The chassis_run code didn't take into account the scenario when the
> > > system-id was changed in the Open_vSwitch table. Due to this the code
> > > was trying to insert a new Chassis record in the OVN_Southbound DB with
> > > the same Encaps as the previous Chassis record. The transaction used
> > > to insert the new records was aborting due to the ["type", "ip"]
> > > index constraint violation as we were creating new Encap entries with
> > > the same "type" and "ip" as the old ones.
> >
> > Thanks.  I applied this series to master.
> > _______________________________________________
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> > [email protected]
> > https://mail.openvswitch.org/mailman/listinfo/ovs-dev
>
> Hi Dumitru,
>
> When reviewing Numan's fix "ovn-controller: Fix the chassis row recreation 
> issue" I found this original change and I have a question here regarding this 
> series. I tried this feature when SSL & RBAC is enabled, and it seems not 
> working as this patch declared. I used the OVN sandbox (which uses SSL by 
> default) to test.
>
> Initially:
> $ ovn-sbctl show
> Chassis "chassis-1"
>     hostname: sandbox
>     Encap geneve
>         ip: "127.0.0.1"
>         options: {csum="true"}
>
> Then update chassis id:
> $ ovs-vsctl set open . external_ids:system-id="chassis-2"
>
> The SB DB didn't get updated, and there are warn logs:
> 2019-07-24T08:28:51.036Z|00015|ovsdb_idl|WARN|transaction error: 
> {"details":"RBAC rules for client \"chassis-1\" role \"ovn-controller\" 
> prohibit modification of table \"Chassis\".","error":"permission error"}
> 2019-07-24T08:28:51.036Z|00016|chassis|WARN|Could not find Chassis : stored 
> (chassis-2) ovs (chassis-2)
>
> This seems to be expected, because otherwise RBAC is malfunctioning. However, 
> I am not sure what is the goal of this patch. Is it supposed to solve the 
> problem only when HV uses TCP but not for SSL? If so, shall this behaviour be 
> clarified in some documents? Or did I misunderstood something? (Sorry that I 
> was not able to post the question during the patch review.)
>
> Thanks,
> Han

Hi Han,

You're right, changing the OVS system-id when using SSL won't work due
to RBAC and that's indeed expected. This was the behavior for
ovn-controller also before the patch. It would be good though to
document that and maybe provide the steps on how to change the ovs
system-id when using SSL: I guess that means stopping ovn-controller,
regenerating certificates and starting ovn-controller. I'll put it on
my TODO list and try to handle it soon.

Thanks,
Dumitru
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