RHEL7: Install RHV Guest Agent and Drivers

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About the Guest Agent

The RHEL 7.x virtual machine guest agent in RHV 4.x provides  drivers, additional data, and functionality once installed on a RHEL virtual machine.

The guest agent includes:

  • virtio-net paravirtualized network driver
  • virtio-scsi paravirtualized HDD driver
  • virtio-balloon driver which improves memory overcommit (currently not used by RHV)
  • rhevm-guest-agent common which allows RHV to retrieve guest internal information such as IP addresses and allows RHV to gracefully reboot the guest

You can view the entire list here.

When spawning a virtual machine in RHV without the guest agent, a warning will appear as an exclamation mark in RHV.

Screenshot from 2019-07-02 16-11-58

Register with Satellite

You can skip this step if your guest is already registered

In order to install the guest agent, I must first register the virtual machine with my local satellite. If not using a local satellite server, you can register with RHN.

First we need to grab the katello rpm from satellite – an insecure satellite server in this case as we are using a self-signed cert.

# curl -Ok https://satellite.lab.localdomain/pub/katello-ca-consumer-latest.noarch.rpm

Then install the rpm.

# rpm -ivh katello-ca-consumer-latest.noarch.rpm

Now register with Satellite. In the example below, we are using a custom activation key and organization.

# subscription-manager register –activationkey=”auburn-lab-ak” –org=”lab”

Installing the Guest Agent

You will need to ensure that the RHEL 7 RH Common repo is enabled. If the repo is not available to the guest, you will need to enable.

# yum repolist | grep common
!rhel-7-server-rh-common-rpms/7Server/x86_64 Red Hat Enterprise Linux 234

If the proper repo is enabled, then run the following command.

Once installed, the orange exclamation point will disappear.

Screenshot from 2019-07-02 17-13-19

Start and Enable the Guest Agent Service

# systemctl enable ovirt-guest-agent.service
# systemctl start ovirt-guest-agent.service

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OpenStack Staging-Ovirt Driver: global name \’sdk\’ is not defined

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Getting Started

The staging-ovirt driver allows OpenStack to easily use ovirt/RHV virtual machines as overcloud nodes.   For those of us running virtualized OpenStack labs, it’s a huge step forward – as we either were previously having to hack our way around pxe_ssh or vmbc. Neither was a great solution.

In order to use the staging-ovirt driver , I first I needed to configure the undercloud to use the staging-ovirt driver. See undercloud.conf below.

Then create an instackenv.json.  In the example below pm_addr is the IP of my local RHV manager.

You should then be able to import your nodes.

openstack overcloud node import instackenv.json

Troubleshooting

Note that I ran into an error importing my nodes. Error shown below.

[{u’result’: u’Node 09dfefec-e5c3-42c4-93d0-45fb44ce37a8 did not reach state “manageable”, the state is “enroll”, error: Failed to get power state for node 09dfefec-e5c3-42c4-93d0-45fb44ce37a8. Error: global name \’sdk\’ is not defined’}, {u’result’: u’Node 59dce2eb-3aea-41f9-aec2-3f13deece30b did not reach state “manageable”, the state is “enroll”, error: Failed to get power state for node 59dce2eb-3aea-41f9-aec2-3f13deece30b. Error: global name \’sdk\’ is not defined’}, {u’result’: u’Node 0895a6d0-f934-44d0-9c26-25e61b6679cb did not reach state “manageable”, the state is “enroll”, error: Failed to get power state for node 0895a6d0-f934-44d0-9c26-25e61b6679cb. Error: global name \’sdk\’ is not defined’}, {u’result’: u’Node 68bdf1cb-fe1f-48ab-b96d-fb5edaf17154 did not reach state “manageable”, the state is “enroll”, error: Failed to get power state for node 68bdf1cb-fe1f-48ab-b96d-fb5edaf17154. Error: global name \’sdk\’ is not defined’}]

Help was found here.

Apparently I was missing a package. I needed to yum install the package shown below and restart ironic-conductor

sudo yum -y install python-ovirt-engine-sdk4.x86_64
sudo systemctl restart openstack-ironic-conductor.service