Hi,
Adding also Marcin here.
I reproduced it as well and I can confirm that the external provider was
called 'OVN' by default at 4.1 time but now engine-setup will create by
default a new provider called 'ovirt-provider-ovn'.
Both the two providers are now configured in the engine to be reached at
https://<enginevm_ip>:9696

The engine can successfully talk with ovirt-provider-ovn while I get errors
like 'Error while listing external networks: EngineException: (Failed with
error Connection reset and code 5050)' when I try to query the old OVN
provider.
Logical networks previously attached to the old OVN provider are still
there in the engine and they are still attached to the old OVN provider.
Unfortunately I'm not able to start/restart VMs with interfaces on a
logical network defined on the OVN provider.
I manually recreated the missing networks on the new 'ovirt-provider-ovn'
provider and I reattached my VMs there and at that point I was finally able
to start again my VMs.


On Mon, May 21, 2018 at 4:55 PM, Gianluca Cecchi <gianluca.cec...@gmail.com>
wrote:

>
>
>>
>>
> Another information regarding my current environment:
> From engine database it results that my OVN provider name is "OVN"
>
> engine=# select id,name from providers;
>                   id                  |          name
> --------------------------------------+------------------------
>  ceab03af-7220-4d42-8f5c-9b557f5d29af | ovirt-image-repository
>  84546a85-2958-4c1d-bbfe-afeb486ebda9 | OVN
> (2 rows)
>
> engine=#
>
> why it seems that in its default config it would name it
> "ovirt-provider-ovn"?
> Does this mean that it will be no conflict in name? But what about the
> current nortbridge and southbridge configs?
>
> Currently my central server is the engine (that is external to the infra)
> and it shows this:
>
> [root@ovmgr1 ~]# ovn-sbctl show
> Chassis "1dce5b7c-a9fc-4ddb-99b4-e2c9e0fa54c5"
>     hostname: "ov200.mydomain"
>     Encap geneve
>         ip: "10.4.192.32"
>         options: {csum="true"}
> Chassis "b8872ab5-4606-4a79-b77d-9d956a18d349"
>     hostname: "ov301.mydomain"
>     Encap geneve
>         ip: "10.4.192.34"
>         options: {csum="true"}
> Chassis "ddecf0da-4708-4f93-958b-6af365a5eeca"
>     hostname: "ov300.mydomain"
>     Encap geneve
>         ip: "10.4.192.33"
>         options: {csum="true"}
> [root@ovmgr1 ~]#
>
> and
>
> [root@ovmgr1 ~]# ovn-nbctl show
>     switch 32367d8a-460f-4447-b35a-abe9ea5187e0 (ovn192)
>         port affc5570-3e5a-439c-9fdf-d75d6810e3a3
>             addresses: ["00:1a:4a:17:01:73 dynamic"]
>         port f639d541-2118-4c24-b478-b7a586eb170c
>             addresses: ["00:1a:4a:17:01:75 dynamic"]
>     switch 6110649a-db2b-4de7-8fbc-601095cfe510 (ovn192)
>     switch 64c4c17f-cd67-4e29-939e-2b952495159f (ovn172)
>         port 32c348d9-12e9-4bcf-a43f-69338c887cfc
>             addresses: ["00:1a:4a:17:01:72 dynamic"]
>         port 3c77c2ea-de00-43f9-a5c5-9b3ffea5ec69
>             addresses: ["00:1a:4a:17:01:74 dynamic"]
>     switch 04501f6b-3977-4ba1-9ead-7096768d796d (ovn172)
>         port 0a2a47bc-ea0d-4f1d-8f49-ec903e519983
>             addresses: ["00:1a:4a:17:01:65 dynamic"]
>         port 8fc7bed4-7663-4903-922b-05e490c6a5a1
>             addresses: ["00:1a:4a:17:01:64 dynamic"]
>         port f2b64f89-b719-484c-ac02-2a1ac8eaacdb
>             addresses: ["00:1a:4a:17:01:59 dynamic"]
>         port f7389c88-1ea1-47c2-92fd-6beffb2e2190
>             addresses: ["00:1a:4a:17:01:58 dynamic"]
> [root@ovmgr1 ~]#
>
>
> and on my hosts currently I have something like this (eg on ov200):
>
> [root@ov200 ~]# ovs-vsctl show
> ae0a1256-7250-46a2-a1b6-8f0ae6105c20
>     Bridge br-int
>         fail_mode: secure
>         Port br-int
>             Interface br-int
>                 type: internal
>         Port "ovn-ddecf0-0"
>             Interface "ovn-ddecf0-0"
>                 type: geneve
>                 options: {csum="true", key=flow, remote_ip="10.4.192.33"}
>         Port "ovn-b8872a-0"
>             Interface "ovn-b8872a-0"
>                 type: geneve
>                 options: {csum="true", key=flow, remote_ip="10.4.192.34"}
>     ovs_version: "2.7.3"
> [root@ov200 ~]#
>
>
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