Re: [ovirt-users] How to setup OVS using python SDK ?

26 Dec 2016

      Hi,

I found a way to update property in setup network as shown below

# Get the reference to the hosts service:
hosts_service = connection.system_service().hosts_service()
myhost = hosts_service.list(search='name=myhost')[0]

myhost_service = hosts_service.host_service(myhost.id)
mynet_attached_services = myhost_service.network_attachments_service()

for mynet_attachment in mynet_attached_services.list():
    if mynet_attachment.network.name == "mynet":
        print "Found : %s"%(mynet_attachment.network.name)
        mynet_attached_services.attachment_service(mynet_attachment.id).update(
attachment=types.NetworkAttachment( properties=[types.Property("ovs","1")]
) )
    else:
        print "Not Found : %s"%(mynet_attachment.network.name)

Please find below ovs output.
# ovs-vsctl show
    Bridge "vdsmbr_tJ9jxY5o"
        Port "em2"
            Interface "em2"
        Port "vdsmbr_tJ9jxY5o"
            Interface "vdsmbr_tJ9jxY5o"
                type: internal
        Port mynet
            Interface mynet
                type: internal
    ovs_version: "2.4.0"

But ovirt is showing me "out-of-sync" message.

*Can someone explain me why it shown as out-of-sync ?*
*How ovirt determine sync on logical network ?*

Thanks,
~Rohit

On Mon, Dec 26, 2016 at 7:04 PM, TranceWorldLogic . <
tranceworldlogic@gmail.com> wrote:
...
Hi,
Thanks for providing script it is working fine.
But it not complete, would you help me to complete step 2 ?
https://www.ovirt.org/networking/ovs/
Setup network
In the oVirt UI open the 'Setup Host Networks' dialog. Proceed to editing
a desired logical network's properties. Among them you will find 'ovs', set
it to 'true' or '1' to mark is as a OVS Network.
And have one doubt.
Why we have to set ovs property two time ?
Thanks,
~Rohit
On Tue, Dec 20, 2016 at 7:44 PM, Juan Hernández <jhernand@redhat.com>
wrote:
...
On 12/20/2016 02:19 PM, TranceWorldLogic . wrote:
...
Hi,
I am trying to setup OVS network using ovirt and found guide as shown
below:
https://www.ovirt.org/networking/ovs/
Then, I tried to explore "vNic Profile" in sdk but not found any ovs
profile in types.py.
Can anyone help me how to setup ovs using python sdk ?
I am using ovirtsdk4 (4.0 version).
Should be something like this:
---8<---
#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# Copyright (c) 2016 Red Hat, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
import logging
import ovirtsdk4 as sdk
import ovirtsdk4.types as types
logging.basicConfig(level=logging.DEBUG, filename='example.log')
# This example will connect to the server and create a logical network
# that using Open vSwitch. Note that in order for this to work the
# engine has to be configured to use Open vSwitch, as described here:
#
#   https://www.ovirt.org/networking/ovs
#
# Specifcally you need to run the following commands in the machine
# where the engine is running:
#
#   engine-config -s CustomDeviceProperties="{type=
interface;prop={ovs=.*}}"
#   engine-config -s
'UserDefinedNetworkCustomProperties=ovs=.*;ovs_aa_sid=.*'
#   systemctl restart ovirt-engine
# Create the connection to the server:
connection = sdk.Connection(
    url='https://engine41.example.com/ovirt-engine/api',
    username='admin@internal',
    password='redhat123',
    ca_file='ca.pem',
    debug=True,
    log=logging.getLogger(),
)
# Get the reference to the root of the tree of services:
system_service = connection.system_service()
# Get the reference to the service that manages the logical networks:
nets_service = system_service.networks_service()
# Create a logical network, which will automatically create a virtual
# NIC profile:
net = nets_service.add(
    network=types.Network(
        name='myovsnetwork',
        data_center=types.DataCenter(
            name='mydc'
        )
    )
)
# Retrieve the details of the virtual NIC profile that was created for
# the network (assuming that there is only one):
profile = connection.follow_link(net.vnic_profiles)[0]
# Get the reference to the service that manages the virtual NIC profile:
profiles_service = system_service.vnic_profiles_service()
profile_service = profiles_service.profile_service(profile.id)
# Update the custom properties of the virtual NIC profile in order to
# enable Open vSwitch:
profile_service.update(
    profile=types.VnicProfile(
        custom_properties=[
            types.CustomProperty(
                name='ovs',
                value='true'
            )
        ]
    )
)
# Close the connection to the server:
connection.close()
--->8---
Note that it isn't complete, and that I didn't test if the OVS network
does work. But at least the creation of the network and the modification
of the VNIC profile does work.
I am suggesting to add this to the collection of examples of the SDK:
Add example of how to create OVS network
  https://gerrit.ovirt.org/68825
You may want to review it.