Hi Dominik 

That immediately fixed the geneve tunnels between all hosts.

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?

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
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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