On Wed, Sep 30, 2020 at 2:33 PM Konstantinos Betsis <k.betsis@gmail.com> wrote:

Sure

I've attached it for easier reference.

On Wed, Sep 30, 2020 at 2:21 PM Dominik Holler <dholler@redhat.com> wrote:

On Wed, Sep 30, 2020 at 1:16 PM Konstantinos Betsis <k.betsis@gmail.com> wrote:
Hi Dominik

The DC01-node02 was formatted and reinstalled and then attached to ovirt environment.
Unfortunately we exhibit the same issue.
The new DC01-node02 tries to establish geneve tunnels to his own IP.
[root@dc01-node02 ~]# ovs-vsctl show
eff2663e-cb10-41b0-93ba-605bb5c7bd78
Bridge br-int
fail_mode: secure
Port "ovn-95ccb0-0"
Interface "ovn-95ccb0-0"
type: geneve
options: {csum="true", key=flow, remote_ip="dc01-node01_IP"}
Port "ovn-be3abc-0"
Interface "ovn-be3abc-0"
type: geneve
options: {csum="true", key=flow, remote_ip="dc01-node02_IP"}
Port "ovn-c4b238-0"
Interface "ovn-c4b238-0"
type: geneve
options: {csum="true", key=flow, remote_ip="dc02-node01_IP"}
Port br-int
Interface br-int
type: internal
ovs_version: "2.11.0"

Is there a way to fix this on the Ovirt engine since this is where the information resides?
Something is broken there.

I suspect that there is an inconsistency in the OVN SB DB.
Is there a way to share your /var/lib/openvswitch/ovnsb_db.db with us?

Thank you
Best Regards
Konstantinos Betsis

On Wed, Sep 16, 2020, 13:25 Dominik Holler <dholler@redhat.com> wrote:

On Wed, Sep 16, 2020 at 12:15 PM Konstantinos Betsis <k.betsis@gmail.com> wrote:
I have a better solution.
I am currently migrating all VMs over to dc01-node01 and then i'll format it as to fix the partitioning as well.

In theory the ovs sbdb will be fixed once it is re-installed....

If not we can then check if there is a stale entry in the ovirt host where the sb db is managed.

Maybe you could ensure that there is no entry anymore during dc01-host02 is reinstalling, before the host is added to oVirt again?

Do you agree with this?

Sounds good, but OVN should be not the reason to reinstall.

On Wed, Sep 16, 2020 at 1:00 PM Dominik Holler <dholler@redhat.com> wrote:

Maybe because of a duplicated entry in the ovn sb db?
Can you please stop the ovn-ctrontroller on this host, remove the host from the ovn sb db, ensure it is gone and restart the ovn-controller on the host?

On Wed, Sep 16, 2020 at 11:55 AM Konstantinos Betsis <k.betsis@gmail.com> wrote:
Hi Dominik

Just saw the below on host dc01-host02
ovs-vsctl show
f3b13557-dfb4-45a4-b6af-c995ccf68720
Bridge br-int
Port "ovn-95ccb0-0"
Interface "ovn-95ccb0-0"
type: geneve
options: {csum="true", key=flow, remote_ip="dc01-host01"}
Port "vnet10"
Interface "vnet10"
Port "vnet11"
Interface "vnet11"
Port "vnet0"
Interface "vnet0"
Port "vnet9"
Interface "vnet9"
Port "vnet8"
Interface "vnet8"
Port br-int
Interface br-int
type: internal
Port "vnet12"
Interface "vnet12"
Port "ovn-be3abc-0"
Interface "ovn-be3abc-0"
type: geneve
options: {csum="true", key=flow, remote_ip="dc01-host02"}
Port "vnet7"
Interface "vnet7"
Port "ovn-c4b238-0"
Interface "ovn-c4b238-0"
type: geneve
options: {csum="true", key=flow, remote_ip="dc02-host01"}
Port "vnet6"
Interface "vnet6"
ovs_version: "2.11.0"

Why would this node establish a geneve tunnel to himself?
Other nodes do not exhibit this behavior.

On Wed, Sep 16, 2020 at 12:21 PM Konstantinos Betsis <k.betsis@gmail.com> wrote:
Hi Dominik

Below is the output of the ovs-vsctl list interface
_uuid : bdaf92c1-4389-4ddf-aab0-93975076ebb2
admin_state : up
bfd : {}
bfd_status : {}
cfm_fault : []
cfm_fault_status : []
cfm_flap_count : []
cfm_health : []
cfm_mpid : []
cfm_remote_mpids : []
cfm_remote_opstate : []
duplex : full
error : []
external_ids : {attached-mac="56:6f:77:61:00:02", iface-id="5d03a7a5-82a1-40f9-b50c-353a26167fa3", iface-status=active, vm-id="e45b7b34-24f2-41ed-b95e-cd1ad532e8d3"}
ifindex : 34
ingress_policing_burst: 0
ingress_policing_rate: 0
lacp_current : []
link_resets : 1
link_speed : 10000000
link_state : up
lldp : {}
mac : []
mac_in_use : "fe:6f:77:61:00:02"
mtu : 1442
mtu_request : []
name : "vnet6"
ofport : 2
ofport_request : []
options : {}
other_config : {}
statistics : {collisions=0, rx_bytes=10828495, rx_crc_err=0, rx_dropped=0, rx_errors=0, rx_frame_err=0, rx_over_err=0, rx_packets=117713, tx_bytes=20771797, tx_dropped=0, tx_errors=0, tx_packets=106954}
status : {driver_name=tun, driver_version="1.6", firmware_version=""}
type : ""

_uuid : bad80911-3993-4085-a0b0-962b6c9156cd
admin_state : up
bfd : {}
bfd_status : {}
cfm_fault : []
cfm_fault_status : []
cfm_flap_count : []
cfm_health : []
cfm_mpid : []
cfm_remote_mpids : []
cfm_remote_opstate : []
duplex : []
error : []
external_ids : {}
ifindex : 39
ingress_policing_burst: 0
ingress_policing_rate: 0
lacp_current : []
link_resets : 0
link_speed : []
link_state : up
lldp : {}
mac : []
mac_in_use : "fe:37:52:c4:cb:03"
mtu : []
mtu_request : []
name : "ovn-c4b238-0"
ofport : 7
ofport_request : []
options : {csum="true", key=flow, remote_ip="192.168.121.164"}
other_config : {}
statistics : {rx_bytes=0, rx_packets=0, tx_bytes=0, tx_packets=0}
status : {tunnel_egress_iface="ovirtmgmt-ams03", tunnel_egress_iface_carrier=up}
type : geneve

_uuid : 8e7705d1-0b9d-4e30-8277-c339e7e1c27a
admin_state : up
bfd : {}
bfd_status : {}
cfm_fault : []
cfm_fault_status : []
cfm_flap_count : []
cfm_health : []
cfm_mpid : []
cfm_remote_mpids : []
cfm_remote_opstate : []
duplex : full
error : []
external_ids : {attached-mac="56:6f:77:61:00:0d", iface-id="b7ff5f2b-4bb4-4250-8ad8-8a7e19d2b4c7", iface-status=active, vm-id="8d73f333-bca4-4b32-9b87-2e7ee07eda84"}
ifindex : 28
ingress_policing_burst: 0
ingress_policing_rate: 0
lacp_current : []
link_resets : 1
link_speed : 10000000
link_state : up
lldp : {}
mac : []
mac_in_use : "fe:6f:77:61:00:0d"
mtu : 1442
mtu_request : []
name : "vnet0"
ofport : 1
ofport_request : []
options : {}
other_config : {}
statistics : {collisions=0, rx_bytes=20609787, rx_crc_err=0, rx_dropped=0, rx_errors=0, rx_frame_err=0, rx_over_err=0, rx_packets=104535, tx_bytes=10830007, tx_dropped=0, tx_errors=0, tx_packets=117735}
status : {driver_name=tun, driver_version="1.6", firmware_version=""}
type : ""

_uuid : 86dcc68a-63e4-4445-9373-81c1f4502c17
admin_state : up
bfd : {}
bfd_status : {}
cfm_fault : []
cfm_fault_status : []
cfm_flap_count : []
cfm_health : []
cfm_mpid : []
cfm_remote_mpids : []
cfm_remote_opstate : []
duplex : full
error : []
external_ids : {attached-mac="56:6f:77:61:00:10", iface-id="4e8d5636-4110-41b2-906d-f9b04c2e62cd", iface-status=active, vm-id="9a002a9b-5f09-4def-a531-d50ff683470b"}
ifindex : 40
ingress_policing_burst: 0
ingress_policing_rate: 0
lacp_current : []
link_resets : 1
link_speed : 10000000
link_state : up
lldp : {}
mac : []
mac_in_use : "fe:6f:77:61:00:10"
mtu : 1442
mtu_request : []
name : "vnet11"
ofport : 10
ofport_request : []
options : {}
other_config : {}
statistics : {collisions=0, rx_bytes=3311352, rx_crc_err=0, rx_dropped=0, rx_errors=0, rx_frame_err=0, rx_over_err=0, rx_packets=51012, tx_bytes=5514116, tx_dropped=0, tx_errors=0, tx_packets=103456}
status : {driver_name=tun, driver_version="1.6", firmware_version=""}
type : ""

_uuid : e8d5e4a2-b9a0-4146-8d98-34713cb443de
admin_state : up
bfd : {}
bfd_status : {}
cfm_fault : []
cfm_fault_status : []
cfm_flap_count : []
cfm_health : []
cfm_mpid : []
cfm_remote_mpids : []
cfm_remote_opstate : []
duplex : full
error : []
external_ids : {attached-mac="56:6f:77:61:00:15", iface-id="b88de6e4-6d77-4e42-b734-4cc676728910", iface-status=active, vm-id="e45b7b34-24f2-41ed-b95e-cd1ad532e8d3"}
ifindex : 37
ingress_policing_burst: 0
ingress_policing_rate: 0
lacp_current : []
link_resets : 1
link_speed : 10000000
link_state : up
lldp : {}
mac : []
mac_in_use : "fe:6f:77:61:00:15"
mtu : 1442
mtu_request : []
name : "vnet9"
ofport : 5
ofport_request : []
options : {}
other_config : {}
statistics : {collisions=0, rx_bytes=180, rx_crc_err=0, rx_dropped=0, rx_errors=0, rx_frame_err=0, rx_over_err=0, rx_packets=2, tx_bytes=4500, tx_dropped=0, tx_errors=0, tx_packets=74}
status : {driver_name=tun, driver_version="1.6", firmware_version=""}
type : ""

_uuid : 6a2974b3-cd72-4688-a630-0a7e9c779b21
admin_state : up
bfd : {}
bfd_status : {}
cfm_fault : []
cfm_fault_status : []
cfm_flap_count : []
cfm_health : []
cfm_mpid : []
cfm_remote_mpids : []
cfm_remote_opstate : []
duplex : full
error : []
external_ids : {attached-mac="56:6f:77:61:00:17", iface-id="64681036-26e2-41d7-b73f-ab5302610145", iface-status=active, vm-id="bf0dc78c-dad5-41a0-914c-ae0da0f9a388"}
ifindex : 41
ingress_policing_burst: 0
ingress_policing_rate: 0
lacp_current : []
link_resets : 1
link_speed : 10000000
link_state : up
lldp : {}
mac : []
mac_in_use : "fe:6f:77:61:00:17"
mtu : 1442
mtu_request : []
name : "vnet12"
ofport : 11
ofport_request : []
options : {}
other_config : {}
statistics : {collisions=0, rx_bytes=5513640, rx_crc_err=0, rx_dropped=0, rx_errors=0, rx_frame_err=0, rx_over_err=0, rx_packets=103450, tx_bytes=3311868, tx_dropped=0, tx_errors=0, tx_packets=51018}
status : {driver_name=tun, driver_version="1.6", firmware_version=""}
type : ""

_uuid : 44498e54-f122-41a0-a41a-7a88ba2dba9b
admin_state : down
bfd : {}
bfd_status : {}
cfm_fault : []
cfm_fault_status : []
cfm_flap_count : []
cfm_health : []
cfm_mpid : []
cfm_remote_mpids : []
cfm_remote_opstate : []
duplex : []
error : []
external_ids : {}
ifindex : 7
ingress_policing_burst: 0
ingress_policing_rate: 0
lacp_current : []
link_resets : 0
link_speed : []
link_state : down
lldp : {}
mac : []
mac_in_use : "32:0a:69:67:07:4f"
mtu : 1442
mtu_request : []
name : br-int
ofport : 65534
ofport_request : []
options : {}
other_config : {}
statistics : {collisions=0, rx_bytes=0, rx_crc_err=0, rx_dropped=326, rx_errors=0, rx_frame_err=0, rx_over_err=0, rx_packets=0, tx_bytes=0, tx_dropped=0, tx_errors=0, tx_packets=0}
status : {driver_name=openvswitch}
type : internal

_uuid : e2114584-8ceb-43d6-817b-e457738ead8a
admin_state : up
bfd : {}
bfd_status : {}
cfm_fault : []
cfm_fault_status : []
cfm_flap_count : []
cfm_health : []
cfm_mpid : []
cfm_remote_mpids : []
cfm_remote_opstate : []
duplex : full
error : []
external_ids : {attached-mac="56:6f:77:61:00:03", iface-id="16162721-c815-4cd8-ab57-f22e6e482c7f", iface-status=active, vm-id="e45b7b34-24f2-41ed-b95e-cd1ad532e8d3"}
ifindex : 35
ingress_policing_burst: 0
ingress_policing_rate: 0
lacp_current : []
link_resets : 1
link_speed : 10000000
link_state : up
lldp : {}
mac : []
mac_in_use : "fe:6f:77:61:00:03"
mtu : 1442
mtu_request : []
name : "vnet7"
ofport : 3
ofport_request : []
options : {}
other_config : {}
statistics : {collisions=0, rx_bytes=180, rx_crc_err=0, rx_dropped=0, rx_errors=0, rx_frame_err=0, rx_over_err=0, rx_packets=2, tx_bytes=4730, tx_dropped=0, tx_errors=0, tx_packets=77}
status : {driver_name=tun, driver_version="1.6", firmware_version=""}
type : ""

_uuid : ee16943e-d145-4080-893f-464098a6388f
admin_state : up
bfd : {}
bfd_status : {}
cfm_fault : []
cfm_fault_status : []
cfm_flap_count : []
cfm_health : []
cfm_mpid : []
cfm_remote_mpids : []
cfm_remote_opstate : []
duplex : []
error : []
external_ids : {}
ifindex : 39
ingress_policing_burst: 0
ingress_policing_rate: 0
lacp_current : []
link_resets : 0
link_speed : []
link_state : up
lldp : {}
mac : []
mac_in_use : "1e:50:3f:a8:42:d1"
mtu : []
mtu_request : []
name : "ovn-be3abc-0"
ofport : 8
ofport_request : []
options : {csum="true", key=flow, remote_ip="DC01-host02"}
other_config : {}
statistics : {rx_bytes=0, rx_packets=0, tx_bytes=0, tx_packets=0}
status : {tunnel_egress_iface="ovirtmgmt-ams03", tunnel_egress_iface_carrier=up}
type : geneve

_uuid : 86a229be-373e-4c43-b2f1-6190523ed73a
admin_state : up
bfd : {}
bfd_status : {}
cfm_fault : []
cfm_fault_status : []
cfm_flap_count : []
cfm_health : []
cfm_mpid : []
cfm_remote_mpids : []
cfm_remote_opstate : []
duplex : full
error : []
external_ids : {attached-mac="56:6f:77:61:00:1c", iface-id="12d829c3-64eb-44bc-a0bd-d7219991f35f", iface-status=active, vm-id="e45b7b34-24f2-41ed-b95e-cd1ad532e8d3"}
ifindex : 38
ingress_policing_burst: 0
ingress_policing_rate: 0
lacp_current : []
link_resets : 1
link_speed : 10000000
link_state : up
lldp : {}
mac : []
mac_in_use : "fe:6f:77:61:00:1c"
mtu : 1442
mtu_request : []
name : "vnet10"
ofport : 6
ofport_request : []
options : {}
other_config : {}
statistics : {collisions=0, rx_bytes=117912, rx_crc_err=0, rx_dropped=0, rx_errors=0, rx_frame_err=0, rx_over_err=0, rx_packets=2195, tx_bytes=4204, tx_dropped=0, tx_errors=0, tx_packets=66}
status : {driver_name=tun, driver_version="1.6", firmware_version=""}
type : ""

_uuid : fa4b8d96-bffe-4b56-930e-0e7fcc5f68ac
admin_state : up
bfd : {}
bfd_status : {}
cfm_fault : []
cfm_fault_status : []
cfm_flap_count : []
cfm_health : []
cfm_mpid : []
cfm_remote_mpids : []
cfm_remote_opstate : []
duplex : []
error : []
external_ids : {}
ifindex : 39
ingress_policing_burst: 0
ingress_policing_rate: 0
lacp_current : []
link_resets : 0
link_speed : []
link_state : up
lldp : {}
mac : []
mac_in_use : "7a:28:24:eb:ec:d2"
mtu : []
mtu_request : []
name : "ovn-95ccb0-0"
ofport : 9
ofport_request : []
options : {csum="true", key=flow, remote_ip="DC01-host01"}
other_config : {}
statistics : {rx_bytes=0, rx_packets=0, tx_bytes=12840478, tx_packets=224029}
status : {tunnel_egress_iface="ovirtmgmt-ams03", tunnel_egress_iface_carrier=up}
type : geneve

_uuid : 5e3df5c7-958c-491d-8d41-0ae83c613f1d
admin_state : up
bfd : {}
bfd_status : {}
cfm_fault : []
cfm_fault_status : []
cfm_flap_count : []
cfm_health : []
cfm_mpid : []
cfm_remote_mpids : []
cfm_remote_opstate : []
duplex : full
error : []
external_ids : {attached-mac="56:6f:77:61:00:06", iface-id="9a6cc189-0934-4468-97ae-09f90fa4598d", iface-status=active, vm-id="e45b7b34-24f2-41ed-b95e-cd1ad532e8d3"}
ifindex : 36
ingress_policing_burst: 0
ingress_policing_rate: 0
lacp_current : []
link_resets : 1
link_speed : 10000000
link_state : up
lldp : {}
mac : []
mac_in_use : "fe:6f:77:61:00:06"
mtu : 1442
mtu_request : []
name : "vnet8"
ofport : 4
ofport_request : []
options : {}
other_config : {}
statistics : {collisions=0, rx_bytes=180, rx_crc_err=0, rx_dropped=0, rx_errors=0, rx_frame_err=0, rx_over_err=0, rx_packets=2, tx_bytes=8829812, tx_dropped=0, tx_errors=0, tx_packets=154540}
status : {driver_name=tun, driver_version="1.6", firmware_version=""}
type : ""

I've identified which VMs have these MAC addresses but i do not see any "conflict" with any other VM's MAC address.

I really do not understand why these will create a conflict.

On Wed, Sep 16, 2020 at 12:06 PM Dominik Holler <dholler@redhat.com> wrote:

On Tue, Sep 15, 2020 at 6:53 PM Konstantinos Betsis <k.betsis@gmail.com> wrote:
So a new test-net was created under DC01 and was depicted in the networks tab under both DC01 and DC02.
I believe for some reason networks are duplicated in DCs, maybe for future use??? Don't know.
If one tries to delete the network from the other DC it gets an error, while if deleted from the once initially created it gets deleted from both.

In oVirt a logical network is an entity in a data center. If the automatic synchronization is enabled on the ovirt-provider-ovn entity in oVirt Engine, the OVN networks are reflected to all data centers. If you do not like this, you can disable the automatic synchronization of the ovirt-provider-ovn in Admin Portal.

From the DC01-node02 i get the following errors:
2020-09-15T16:48:49.904Z|22748|main|INFO|OVNSB commit failed, force recompute next time.
2020-09-15T16:48:49.905Z|22749|binding|INFO|Claiming lport 9a6cc189-0934-4468-97ae-09f90fa4598d for this chassis.
2020-09-15T16:48:49.905Z|22750|binding|INFO|9a6cc189-0934-4468-97ae-09f90fa4598d: Claiming 56:6f:77:61:00:06
2020-09-15T16:48:49.905Z|22751|binding|INFO|Claiming lport 16162721-c815-4cd8-ab57-f22e6e482c7f for this chassis.
2020-09-15T16:48:49.905Z|22752|binding|INFO|16162721-c815-4cd8-ab57-f22e6e482c7f: Claiming 56:6f:77:61:00:03
2020-09-15T16:48:49.905Z|22753|binding|INFO|Claiming lport b88de6e4-6d77-4e42-b734-4cc676728910 for this chassis.
2020-09-15T16:48:49.905Z|22754|binding|INFO|b88de6e4-6d77-4e42-b734-4cc676728910: Claiming 56:6f:77:61:00:15
2020-09-15T16:48:49.905Z|22755|binding|INFO|Claiming lport b7ff5f2b-4bb4-4250-8ad8-8a7e19d2b4c7 for this chassis.
2020-09-15T16:48:49.905Z|22756|binding|INFO|b7ff5f2b-4bb4-4250-8ad8-8a7e19d2b4c7: Claiming 56:6f:77:61:00:0d
2020-09-15T16:48:49.905Z|22757|binding|INFO|Claiming lport 5d03a7a5-82a1-40f9-b50c-353a26167fa3 for this chassis.
2020-09-15T16:48:49.905Z|22758|binding|INFO|5d03a7a5-82a1-40f9-b50c-353a26167fa3: Claiming 56:6f:77:61:00:02
2020-09-15T16:48:49.905Z|22759|binding|INFO|Claiming lport 12d829c3-64eb-44bc-a0bd-d7219991f35f for this chassis.
2020-09-15T16:48:49.905Z|22760|binding|INFO|12d829c3-64eb-44bc-a0bd-d7219991f35f: Claiming 56:6f:77:61:00:1c
2020-09-15T16:48:49.959Z|22761|main|INFO|OVNSB commit failed, force recompute next time.
2020-09-15T16:48:49.960Z|22762|binding|INFO|Claiming lport 9a6cc189-0934-4468-97ae-09f90fa4598d for this chassis.
2020-09-15T16:48:49.960Z|22763|binding|INFO|9a6cc189-0934-4468-97ae-09f90fa4598d: Claiming 56:6f:77:61:00:06
2020-09-15T16:48:49.960Z|22764|binding|INFO|Claiming lport 16162721-c815-4cd8-ab57-f22e6e482c7f for this chassis.
2020-09-15T16:48:49.960Z|22765|binding|INFO|16162721-c815-4cd8-ab57-f22e6e482c7f: Claiming 56:6f:77:61:00:03
2020-09-15T16:48:49.960Z|22766|binding|INFO|Claiming lport b88de6e4-6d77-4e42-b734-4cc676728910 for this chassis.
2020-09-15T16:48:49.960Z|22767|binding|INFO|b88de6e4-6d77-4e42-b734-4cc676728910: Claiming 56:6f:77:61:00:15
2020-09-15T16:48:49.960Z|22768|binding|INFO|Claiming lport b7ff5f2b-4bb4-4250-8ad8-8a7e19d2b4c7 for this chassis.
2020-09-15T16:48:49.960Z|22769|binding|INFO|b7ff5f2b-4bb4-4250-8ad8-8a7e19d2b4c7: Claiming 56:6f:77:61:00:0d
2020-09-15T16:48:49.960Z|22770|binding|INFO|Claiming lport 5d03a7a5-82a1-40f9-b50c-353a26167fa3 for this chassis.
2020-09-15T16:48:49.960Z|22771|binding|INFO|5d03a7a5-82a1-40f9-b50c-353a26167fa3: Claiming 56:6f:77:61:00:02
2020-09-15T16:48:49.960Z|22772|binding|INFO|Claiming lport 12d829c3-64eb-44bc-a0bd-d7219991f35f for this chassis.
2020-09-15T16:48:49.960Z|22773|binding|INFO|12d829c3-64eb-44bc-a0bd-d7219991f35f: Claiming 56:6f:77:61:00:1c

And this repeats forever.

Looks like the southbound db is confused.

Can you try to delete all chassis listed by
sudo ovn-sbctl show
via
sudo /usr/share/ovirt-provider-ovn/scripts/remove_chassis.sh dev-host0
?
if the script remove_chassis.sh is not installed, you can use
https://github.com/oVirt/ovirt-provider-ovn/blob/master/provider/scripts/remove_chassis.py
instead.

Can you please also share the output of
ovs-vsctl list Interface
on the host which produced the logfile above?

The connections to ovn-sbctl is ok and the geneve tunnels are depicted under ovs-vsctl ok.
VMs still not able to ping each other.

On Tue, Sep 15, 2020 at 7:22 PM Dominik Holler <dholler@redhat.com> wrote:

On Tue, Sep 15, 2020 at 6:18 PM Konstantinos Betsis <k.betsis@gmail.com> wrote:
Hi Dominik

Fixed the issue.

Thanks.

I believe the /etc/ovirt-provider-ovn/conf.d/10-setup-ovirt-provider-ovn.conf needed update also.
The package is upgraded to the latest version.

Once the provider was updated with the following it functioned perfectly:
Name: ovirt-provider-ovn
Description: oVirt network provider for OVN
Type: External Network Provider
Network Plugin: oVirt Network Provider for OVN
Automatic Synchronization: Checked
Unmanaged: Unchecked
Provider URL: https:dc02-ovirt01.testdomain.com:9696
Requires Authentication: Checked
Username: admin@internal
Password: "The admin password"
Protocol: HTTPS
Host Name: dc02-ovirt01.testdomain.com
API Port: 35357
API Version: v2.0
Tenant Name: "Empty"

For some reason the TLS certificate was in conflict with the ovn provider details, i would bet the "host" entry.

So now geneve tunnels are established.
OVN provider is working.

But VMs still do not communicated on the same VM network spanning different hosts.

So if we have a VM network test-net on both dc01-host01 and dc01-host02 and each host has a VM with IP addresses on the same network, VMs on the same VM network should communicate directly.
But traffic does not reach each other.

Can you create a new external network, with port security disabled, and an IPv4 subnet?
If the VMs get an IP address via DHCP, ovn is working, and should be able to ping each other, too.
If not, there should be a helpful entry in the ovn-controller.log of the host the VM is running.

On Tue, Sep 15, 2020 at 7:07 PM Dominik Holler <dholler@redhat.com> wrote:
Can you try again with:

[OVN REMOTE]
ovn-remote=ssl:127.0.0.1:6641
[SSL]
https-enabled=false
ssl-cacert-file=/etc/pki/ovirt-engine/ca.pem
ssl-cert-file=/etc/pki/ovirt-engine/certs/ovirt-provider-ovn.cer
ssl-key-file=/etc/pki/ovirt-engine/keys/ovirt-provider-ovn.key.nopass
[OVIRT]
ovirt-sso-client-secret=random_test
ovirt-host=https://dc02-ovirt01.testdomain.com:443
ovirt-sso-client-id=ovirt-provider-ovn
ovirt-ca-file=/etc/pki/ovirt-engine/apache-ca.pem
[NETWORK]
port-security-enabled-default=True
[PROVIDER]
provider-host=dc02-ovirt01.testdomain.com

Please note that the should match the HTTP or HTTPS in the of the ovirt-prover-ovn configuration in oVirt Engine.
So if the ovirt-provider-ovn entity in Engine is on HTTP, the config file should use
https-enabled=false

On Tue, Sep 15, 2020 at 5:56 PM Konstantinos Betsis <k.betsis@gmail.com> wrote:
This is the updated one:
# This file is automatically generated by engine-setup. Please do not edit manually
[OVN REMOTE]
ovn-remote=ssl:127.0.0.1:6641
[SSL]
https-enabled=true
ssl-cacert-file=/etc/pki/ovirt-engine/ca.pem
ssl-cert-file=/etc/pki/ovirt-engine/certs/ovirt-provider-ovn.cer
ssl-key-file=/etc/pki/ovirt-engine/keys/ovirt-provider-ovn.key.nopass
[OVIRT]
ovirt-sso-client-secret=random_text
ovirt-host=https://dc02-ovirt01.testdomain.com:443
ovirt-sso-client-id=ovirt-provider-ovn
ovirt-ca-file=/etc/pki/ovirt-engine/apache-ca.pem
[NETWORK]
port-security-enabled-default=True
[PROVIDER]
provider-host=dc02-ovirt01.testdomain.com
[AUTH]
auth-plugin=auth.plugins.static_token:NoAuthPlugin

However, it still does not connect.
It prompts for the certificate but then fails and prompts to see the log but the ovirt-provider-ovn.log does not list anything.

Yes we've got ovirt for about a year now from about version 4.1

This might explain the trouble. Upgrade of ovirt-provider-ovn should work flawlessly starting from oVirt 4.2.

On Tue, Sep 15, 2020 at 6:44 PM Dominik Holler <dholler@redhat.com> wrote:

On Tue, Sep 15, 2020 at 5:34 PM Konstantinos Betsis <k.betsis@gmail.com> wrote:
There is a file with the below entries

Impressive, do you know when this config file was created and if it was manually modified?
Is this an upgrade from oVirt 4.1?

[root@dc02-ovirt01 log]# cat /etc/ovirt-provider-ovn/conf.d/10-setup-ovirt-provider-ovn.conf
# This file is automatically generated by engine-setup. Please do not edit manually
[OVN REMOTE]
ovn-remote=tcp:127.0.0.1:6641
[SSL]
https-enabled=false
ssl-cacert-file=/etc/pki/ovirt-engine/ca.pem
ssl-cert-file=/etc/pki/ovirt-engine/certs/ovirt-provider-ovn.cer
ssl-key-file=/etc/pki/ovirt-engine/keys/ovirt-provider-ovn.key.nopass
[OVIRT]
ovirt-sso-client-secret=random_test
ovirt-host=https://dc02-ovirt01.testdomain.com:443
ovirt-sso-client-id=ovirt-provider-ovn
ovirt-ca-file=/etc/pki/ovirt-engine/apache-ca.pem
[NETWORK]
port-security-enabled-default=True
[PROVIDER]
provider-host=dc02-ovirt01.testdomain.com

The only entry missing is the [AUTH] and under [SSL] the https-enabled is false. Should I edit this in this file or is this going to break everything?

Changing the file should improve, but better create a backup into another diretory before modification.
The only required change is
from
ovn-remote=tcp:127.0.0.1:6641
to
ovn-remote=ssl:127.0.0.1:6641

On Tue, Sep 15, 2020 at 6:27 PM Dominik Holler <dholler@redhat.com> wrote:

On Tue, Sep 15, 2020 at 5:11 PM Konstantinos Betsis <k.betsis@gmail.com> wrote:
Hi Dominik

That immediately fixed the geneve tunnels between all hosts.

thanks for the feedback.

However, the ovn provider is not broken.
After fixing the networks we tried to move a VM to the DC01-host01 so we powered it down and simply configured it to run on dc01-node01.

While checking the logs on the ovirt engine i noticed the below:
Failed to synchronize networks of Provider ovirt-provider-ovn.

The ovn-provider configure on the engine is the below:
Name: ovirt-provider-ovn
Description: oVirt network provider for OVN
Type: External Network Provider
Network Plugin: oVirt Network Provider for OVN
Automatic Synchronization: Checked
Unmanaged: Unchecked
Provider URL: http:localhost:9696
Requires Authentication: Checked
Username: admin@internal
Password: "The admin password"
Protocol: hTTP
Host Name: dc02-ovirt01
API Port: 35357
API Version: v2.0
Tenant Name: "Empty"

In the past this was deleted by an engineer and recreated as per the documentation, and it worked. Do we need to update something due to the SSL on the ovn?

Is there a file in /etc/ovirt-provider-ovn/conf.d/ ?
engine-setup should have created one.
If the file is missing, for testing purposes, you can create a file /etc/ovirt-provider-ovn/conf.d/00-setup-ovirt-provider-ovn-test.conf :
[PROVIDER]
provider-host=REPLACE_WITH_FQDN
[SSL]
ssl-cert-file=/etc/pki/ovirt-engine/certs/ovirt-provider-ovn.cer
ssl-key-file=/etc/pki/ovirt-engine/keys/ovirt-provider-ovn.key.nopass
ssl-cacert-file=/etc/pki/ovirt-engine/ca.pem
https-enabled=true
[OVN REMOTE]
ovn-remote=ssl:127.0.0.1:6641
[AUTH]
auth-plugin=auth.plugins.static_token:NoAuthPlugin
[NETWORK]
port-security-enabled-default=True

and restart the ovirt-provider-ovn service.

From the ovn-provider logs the below is generated after a service restart and when the start VM is triggered
2020-09-15 15:07:33,579 root Starting server
2020-09-15 15:07:33,579 root Version: 1.2.29-1
2020-09-15 15:07:33,579 root Build date: 20191217125241
2020-09-15 15:07:33,579 root Githash: cb5a80d
2020-09-15 15:08:26,582 root From: ::ffff:127.0.0.1:59980 Request: GET /v2.0/ports
2020-09-15 15:08:26,582 root Could not retrieve schema from tcp:127.0.0.1:6641: Unknown error -1
Traceback (most recent call last):
File "/usr/share/ovirt-provider-ovn/handlers/base_handler.py", line 138, in _handle_request
method, path_parts, content
File "/usr/share/ovirt-provider-ovn/handlers/selecting_handler.py", line 175, in handle_request
return self.call_response_handler(handler, content, parameters)
File "/usr/share/ovirt-provider-ovn/handlers/neutron.py", line 35, in call_response_handler
with NeutronApi() as ovn_north:
File "/usr/share/ovirt-provider-ovn/neutron/neutron_api.py", line 95, in __init__
self.ovsidl, self.idl = ovn_connection.connect()
File "/usr/share/ovirt-provider-ovn/ovn_connection.py", line 46, in connect
ovnconst.OVN_NORTHBOUND
File "/usr/lib/python2.7/site-packages/ovsdbapp/backend/ovs_idl/connection.py", line 127, in from_server
helper = idlutils.get_schema_helper(connection_string, schema_name)
File "/usr/lib/python2.7/site-packages/ovsdbapp/backend/ovs_idl/idlutils.py", line 128, in get_schema_helper
'err': os.strerror(err)})
Exception: Could not retrieve schema from tcp:127.0.0.1:6641: Unknown error -1

When i update the ovn provider from the GUI to have https://localhost:9696/ and HTTPS as the protocol the test fails.

On Tue, Sep 15, 2020 at 5:35 PM Dominik Holler <dholler@redhat.com> wrote:

On Mon, Sep 14, 2020 at 9:25 AM Konstantinos Betsis <k.betsis@gmail.com> wrote:
Hi Dominik

When these commands are used on the ovirt-engine host the output is the one depicted in your email.
For your reference see also below:
[root@ath01-ovirt01 certs]# ovn-nbctl get-ssl
Private key: /etc/pki/ovirt-engine/keys/ovn-ndb.key.nopass
Certificate: /etc/pki/ovirt-engine/certs/ovn-ndb.cer
CA Certificate: /etc/pki/ovirt-engine/ca.pem
Bootstrap: false
[root@ath01-ovirt01 certs]# ovn-nbctl get-connection
ptcp:6641
[root@ath01-ovirt01 certs]# ovn-sbctl get-ssl
Private key: /etc/pki/ovirt-engine/keys/ovn-sdb.key.nopass
Certificate: /etc/pki/ovirt-engine/certs/ovn-sdb.cer
CA Certificate: /etc/pki/ovirt-engine/ca.pem
Bootstrap: false
[root@ath01-ovirt01 certs]# ovn-sbctl get-connection
read-write role="" ptcp:6642

^^^ the line above points to the problem: ovn-central is configured to use plain TCP without ssl.
engine-setup usually configures ovn-central to use SSL. That the files /etc/pki/ovirt-engine/keys/ovn-* exist, shows,
that engine-setup was triggered correctly. Looks like the ovn db was dropped somehow, this should not happen.
This can be fixed manually by executing the following commands on engine's machine:
ovn-nbctl set-ssl /etc/pki/ovirt-engine/keys/ovn-ndb.key.nopass /etc/pki/ovirt-engine/certs/ovn-ndb.cer /etc/pki/ovirt-engine/ca.pem
ovn-nbctl set-connection pssl:6641
ovn-sbctl set-ssl /etc/pki/ovirt-engine/keys/ovn-sdb.key.nopass /etc/pki/ovirt-engine/certs/ovn-sdb.cer /etc/pki/ovirt-engine/ca.pem
ovn-sbctl set-connection pssl:6642

The /var/log/openvswitch/ovn-controller.log on the hosts should tell that br-int.mgmt is connected now.

[root@ath01-ovirt01 certs]# ls -l /etc/pki/ovirt-engine/keys/ovn-*
-rw-r-----. 1 root hugetlbfs 1828 Jun 25 11:08 /etc/pki/ovirt-engine/keys/ovn-ndb.key.nopass
-rw-------. 1 root root 2893 Jun 25 11:08 /etc/pki/ovirt-engine/keys/ovn-ndb.p12
-rw-r-----. 1 root hugetlbfs 1828 Jun 25 11:08 /etc/pki/ovirt-engine/keys/ovn-sdb.key.nopass
-rw-------. 1 root root 2893 Jun 25 11:08 /etc/pki/ovirt-engine/keys/ovn-sdb.p12

When i try the above commands on the node hosts the following happens:
ovn-nbctl get-ssl / get-connection
ovn-nbctl: unix:/var/run/openvswitch/ovnnb_db.sock: database connection failed (No such file or directory)
The above i believe is expected since no northbound connections should be established from the host nodes.

ovn-sbctl get-ssl /get-connection
The output is stuck till i terminate it.

Yes, the ovn-* commands works only on engine's machine, which has the role ovn-central.
On the hosts, there is only the ovn-controller, which connects the ovn southbound to openvswitch on the host.

For the requested logs the below are found in the ovsdb-server-sb.log
2020-09-14T07:18:38.187Z|219636|reconnect|WARN|tcp:DC02-host01:33146: connection dropped (Protocol error)
2020-09-14T07:18:41.946Z|219637|reconnect|WARN|tcp:DC01-host01:51188: connection dropped (Protocol error)
2020-09-14T07:18:43.033Z|219638|reconnect|WARN|tcp:DC01-host02:37044: connection dropped (Protocol error)
2020-09-14T07:18:46.198Z|219639|reconnect|WARN|tcp:DC02-host01:33148: connection dropped (Protocol error)
2020-09-14T07:18:50.069Z|219640|jsonrpc|WARN|Dropped 4 log messages in last 12 seconds (most recently, 4 seconds ago) due to excessive rate
2020-09-14T07:18:50.069Z|219641|jsonrpc|WARN|tcp:DC01-host01:51190: error parsing stream: line 0, column 0, byte 0: invalid character U+0016
2020-09-14T07:18:50.069Z|219642|jsonrpc|WARN|Dropped 4 log messages in last 12 seconds (most recently, 4 seconds ago) due to excessive rate
2020-09-14T07:18:50.069Z|219643|jsonrpc|WARN|tcp:DC01-host01:51190: received SSL data on JSON-RPC channel
2020-09-14T07:18:50.070Z|219644|reconnect|WARN|tcp:DC01-host01:51190: connection dropped (Protocol error)
2020-09-14T07:18:51.147Z|219645|reconnect|WARN|tcp:DC01-host02:37046: connection dropped (Protocol error)
2020-09-14T07:18:54.209Z|219646|reconnect|WARN|tcp:DC02-host01:33150: connection dropped (Protocol error)
2020-09-14T07:18:58.192Z|219647|reconnect|WARN|tcp:DC01-host01:51192: connection dropped (Protocol error)
2020-09-14T07:18:59.262Z|219648|jsonrpc|WARN|Dropped 3 log messages in last 8 seconds (most recently, 1 seconds ago) due to excessive rate
2020-09-14T07:18:59.262Z|219649|jsonrpc|WARN|tcp:DC01-host02:37048: error parsing stream: line 0, column 0, byte 0: invalid character U+0016
2020-09-14T07:18:59.263Z|219650|jsonrpc|WARN|Dropped 3 log messages in last 8 seconds (most recently, 1 seconds ago) due to excessive rate
2020-09-14T07:18:59.263Z|219651|jsonrpc|WARN|tcp:DC01-host02:37048: received SSL data on JSON-RPC channel
2020-09-14T07:18:59.263Z|219652|reconnect|WARN|tcp:DC01-host02:37048: connection dropped (Protocol error)
2020-09-14T07:19:02.220Z|219653|reconnect|WARN|tcp:DC02-host01:33152: connection dropped (Protocol error)
2020-09-14T07:19:06.316Z|219654|reconnect|WARN|tcp:DC01-host01:51194: connection dropped (Protocol error)
2020-09-14T07:19:07.386Z|219655|reconnect|WARN|tcp:DC01-host02:37050: connection dropped (Protocol error)
2020-09-14T07:19:10.232Z|219656|reconnect|WARN|tcp:DC02-host01:33154: connection dropped (Protocol error)
2020-09-14T07:19:14.439Z|219657|jsonrpc|WARN|Dropped 4 log messages in last 12 seconds (most recently, 4 seconds ago) due to excessive rate
2020-09-14T07:19:14.439Z|219658|jsonrpc|WARN|tcp:DC01-host01:51196: error parsing stream: line 0, column 0, byte 0: invalid character U+0016
2020-09-14T07:19:14.439Z|219659|jsonrpc|WARN|Dropped 4 log messages in last 12 seconds (most recently, 4 seconds ago) due to excessive rate
2020-09-14T07:19:14.439Z|219660|jsonrpc|WARN|tcp:DC01-host01:51196: received SSL data on JSON-RPC channel
2020-09-14T07:19:14.440Z|219661|reconnect|WARN|tcp:DC01-host01:51196: connection dropped (Protocol error)
2020-09-14T07:19:15.505Z|219662|reconnect|WARN|tcp:DC01-host02:37052: connection dropped (Protocol error)

How can we fix these SSL errors?

I addressed this above.

I thought vdsm did the certificate provisioning on the host nodes as to communicate to the engine host node.

Yes, this seems to work in your scenario, just the SSL configuration on the ovn-central was lost.

On Fri, Sep 11, 2020 at 6:39 PM Dominik Holler <dholler@redhat.com> wrote:
Looks still like the ovn-controller on the host has problems communicating with ovn-southbound.

Are there any hints in /var/log/openvswitch/*.log, especially in /var/log/openvswitch/ovsdb-server-sb.log ?

Can you please check the output of

ovn-nbctl get-ssl
ovn-nbctl get-connection
ovn-sbctl get-ssl
ovn-sbctl get-connection
ls -l /etc/pki/ovirt-engine/keys/ovn-*

it should be similar to

[root@ovirt-43 ~]# ovn-nbctl get-ssl
Private key: /etc/pki/ovirt-engine/keys/ovn-ndb.key.nopass
Certificate: /etc/pki/ovirt-engine/certs/ovn-ndb.cer
CA Certificate: /etc/pki/ovirt-engine/ca.pem
Bootstrap: false
[root@ovirt-43 ~]# ovn-nbctl get-connection
pssl:6641:[::]
[root@ovirt-43 ~]# ovn-sbctl get-ssl
Private key: /etc/pki/ovirt-engine/keys/ovn-sdb.key.nopass
Certificate: /etc/pki/ovirt-engine/certs/ovn-sdb.cer
CA Certificate: /etc/pki/ovirt-engine/ca.pem
Bootstrap: false
[root@ovirt-43 ~]# ovn-sbctl get-connection
read-write role="" pssl:6642:[::]
[root@ovirt-43 ~]# ls -l /etc/pki/ovirt-engine/keys/ovn-*
-rw-r-----. 1 root hugetlbfs 1828 Oct 14 2019 /etc/pki/ovirt-engine/keys/ovn-ndb.key.nopass
-rw-------. 1 root root 2709 Oct 14 2019 /etc/pki/ovirt-engine/keys/ovn-ndb.p12
-rw-r-----. 1 root hugetlbfs 1828 Oct 14 2019 /etc/pki/ovirt-engine/keys/ovn-sdb.key.nopass
-rw-------. 1 root root 2709 Oct 14 2019 /etc/pki/ovirt-engine/keys/ovn-sdb.p12

On Fri, Sep 11, 2020 at 1:10 PM Konstantinos Betsis <k.betsis@gmail.com> wrote:
I did a restart of the ovn-controller, this is the output of the ovn-controller.log

2020-09-11T10:54:07.566Z|00001|vlog|INFO|opened log file /var/log/openvswitch/ovn-controller.log
2020-09-11T10:54:07.568Z|00002|reconnect|INFO|unix:/var/run/openvswitch/db.sock: connecting...
2020-09-11T10:54:07.568Z|00003|reconnect|INFO|unix:/var/run/openvswitch/db.sock: connected
2020-09-11T10:54:07.570Z|00004|main|INFO|OVS IDL reconnected, force recompute.
2020-09-11T10:54:07.571Z|00005|reconnect|INFO|ssl:OVIRT_ENGINE_IP:6642: connecting...
2020-09-11T10:54:07.571Z|00006|main|INFO|OVNSB IDL reconnected, force recompute.
2020-09-11T10:54:07.685Z|00007|stream_ssl|WARN|SSL_connect: unexpected SSL connection close
2020-09-11T10:54:07.685Z|00008|reconnect|INFO|ssl:OVIRT_ENGINE_IP:6642: connection attempt failed (Protocol error)
2020-09-11T10:54:08.685Z|00009|reconnect|INFO|ssl:OVIRT_ENGINE_IP:6642: connecting...
2020-09-11T10:54:08.800Z|00010|stream_ssl|WARN|SSL_connect: unexpected SSL connection close
2020-09-11T10:54:08.800Z|00011|reconnect|INFO|ssl:OVIRT_ENGINE_IP:6642: connection attempt failed (Protocol error)
2020-09-11T10:54:08.800Z|00012|reconnect|INFO|ssl:OVIRT_ENGINE_IP:6642: waiting 2 seconds before reconnect
2020-09-11T10:54:10.802Z|00013|reconnect|INFO|ssl:OVIRT_ENGINE_IP:6642: connecting...
2020-09-11T10:54:10.917Z|00014|stream_ssl|WARN|SSL_connect: unexpected SSL connection close
2020-09-11T10:54:10.917Z|00015|reconnect|INFO|ssl:OVIRT_ENGINE_IP:6642: connection attempt failed (Protocol error)
2020-09-11T10:54:10.917Z|00016|reconnect|INFO|ssl:OVIRT_ENGINE_IP:6642: waiting 4 seconds before reconnect
2020-09-11T10:54:14.921Z|00017|reconnect|INFO|ssl:OVIRT_ENGINE_IP:6642: connecting...
2020-09-11T10:54:15.036Z|00018|stream_ssl|WARN|SSL_connect: unexpected SSL connection close
2020-09-11T10:54:15.036Z|00019|reconnect|INFO|ssl:OVIRT_ENGINE_IP:6642: connection attempt failed (Protocol error)
2020-09-11T10:54:15.036Z|00020|reconnect|INFO|ssl:OVIRT_ENGINE_IP:6642: continuing to reconnect in the background but suppressing further logging

I have also done the vdsm-tool ovn-config OVIRT_ENGINE_IP OVIRTMGMT_NETWORK_DC
This is how the OVIRT_ENGINE_IP is provided in the ovn controller, i can redo it if you wan.

After the restart of the ovn-controller the OVIRT ENGINE still shows only two geneve connections one with DC01-host02 and DC02-host01.
Chassis "c4b23834-aec7-4bf8-8be7-aa94a50a6144"
hostname: "dc02-host01"
Encap geneve
ip: "DC02-host01_IP"
options: {csum="true"}
Chassis "be3abcc9-7358-4040-a37b-8d8a782f239c"
hostname: "DC01-host02"
Encap geneve
ip: "DC01-host02"
options: {csum="true"}

I've re-done the vdsm-tool command and nothing changed.... again....with the same errors as the systemctl restart ovn-controller

On Fri, Sep 11, 2020 at 1:49 PM Dominik Holler <dholler@redhat.com> wrote:
Please include ovirt-users list in your reply, to share the knowledge and experience with the community!

On Fri, Sep 11, 2020 at 12:12 PM Konstantinos Betsis <k.betsis@gmail.com> wrote:
Ok below the output per node and DC
DC01
node01
[root@dc01-node01 ~]# ovs-vsctl --no-wait get open . external-ids:ovn-remote
"ssl:OVIRT_ENGINE_IP:6642"
[root@ dc01-node01 ~]# ovs-vsctl --no-wait get open . external-ids:ovn-encap-type
geneve
[root@ dc01-node01 ~]# ovs-vsctl --no-wait get open . external-ids:ovn-encap-ip
"OVIRTMGMT_IP_DC01-NODE01"

node02
[root@dc01-node02 ~]# ovs-vsctl --no-wait get open . external-ids:ovn-remote
"ssl:OVIRT_ENGINE_IP:6642"
[root@ dc01-node02 ~]# ovs-vsctl --no-wait get open . external-ids:ovn-encap-type
geneve
[root@ dc01-node02 ~]# ovs-vsctl --no-wait get open . external-ids:ovn-encap-ip
"OVIRTMGMT_IP_DC01-NODE02"

DC02
node01
[root@dc02-node01 ~]# ovs-vsctl --no-wait get open . external-ids:ovn-remote
"ssl:OVIRT_ENGINE_IP:6642"
[root@ dc02-node01 ~]# ovs-vsctl --no-wait get open . external-ids:ovn-encap-type
geneve
[root@ dc02-node01 ~]# ovs-vsctl --no-wait get open . external-ids:ovn-encap-ip
"OVIRTMGMT_IP_DC02-NODE01"

Looks good.

DC01 node01 and node02 share the same VM networks and VMs deployed on top of them cannot talk to VM on the other hypervisor.

Maybe there is a hint on ovn-controller.log on dc01-node02 ? Maybe restarting ovn-controller creates more helpful log messages?

You can also try restart the ovn configuration on all hosts by executing
vdsm-tool ovn-config OVIRT_ENGINE_IP LOCAL_OVIRTMGMT_IP
on each host, this would trigger
https://github.com/oVirt/ovirt-provider-ovn/blob/master/driver/scripts/setup_ovn_controller.sh
internally.

So I would expect to see the same output for node01 to have a geneve tunnel to node02 and vice versa.

Me too.

On Fri, Sep 11, 2020 at 12:14 PM Dominik Holler <dholler@redhat.com> wrote:

On Fri, Sep 11, 2020 at 10:53 AM Konstantinos Betsis <k.betsis@gmail.com> wrote:
Hi Dominik

OVN is selected as the default network provider on the clusters and the hosts.

sounds good.
This configuration is required already during the host is added to oVirt Engine, because OVN is configured during this step.

The "ovn-sbctl show" works on the ovirt engine and shows only two hosts, 1 per DC.
Chassis "c4b23834-aec7-4bf8-8be7-aa94a50a6144"
hostname: "dc01-node02"
Encap geneve
ip: "X.X.X.X"
options: {csum="true"}
Chassis "be3abcc9-7358-4040-a37b-8d8a782f239c"
hostname: "dc02-node1"
Encap geneve
ip: "A.A.A.A"
options: {csum="true"}

The new node is not listed (dc01-node1).

When executed on the nodes the same command (ovn-sbctl show) times-out on all nodes.....

The output of the /var/log/openvswitch/ovn-conntroller.log lists on all logs
2020-09-11T08:46:55.197Z|07361|stream_ssl|WARN|SSL_connect: unexpected SSL connection close

Can you please compare the output of

ovs-vsctl --no-wait get open . external-ids:ovn-remote
ovs-vsctl --no-wait get open . external-ids:ovn-encap-type
ovs-vsctl --no-wait get open . external-ids:ovn-encap-ip

of the working hosts, e.g. dc01-node02, and the failing host dc01-node1?
This should point us the relevant difference in the configuration.

Please include ovirt-users list in your replay, to share the knowledge and experience with the community.

Thank you
Best regards
Konstantinos Betsis

On Fri, Sep 11, 2020 at 11:01 AM Dominik Holler <dholler@redhat.com> wrote:

On Thu, Sep 10, 2020 at 6:26 PM Konstantinos B <k.betsis@gmail.com> wrote:
Hi all

We have a small installation based on OVIRT 4.3.
1 Cluster is based on Centos 7 and the other on OVIRT NG Node image.

The environment was stable till an upgrade took place a couple of months ago.
As such we had to re-install one of the Centos 7 node and start from scratch.

To trigger the automatic configuration of the host, it is required to configure ovirt-provider-ovn as the default network provider for the cluster before adding the host to oVirt.

Even though the installation completed successfully and VMs are created, the following are not working as expected:
1. ovn geneve tunnels are not established with the other Centos 7 node in the cluster.
2. Centos 7 node is configured by ovirt engine however no geneve tunnel is established when "ovn-sbctl show" is issued on the engine.

Does "ovn-sbctl show" list the hosts?

3. no flows are shown on the engine on port 6642 for the ovs db.

Does anyone have any experience on how to troubleshoot OVN on ovirt?

/var/log/openvswitch/ovncontroller.log on the host should contain a helpful hint.

Thank you
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