OpenShift Virtualization

Contents

• Defining File System Configurations for VM
• Windows VM
• ExpandingVMDisk
• RunningVMOnSpecificNode
• UserAccess
• Networking
• Backup&Restore
• ClusterUpdate
• UsefulLinks

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Defining File System Configurations for VM:

Create the rhel9 guest image:

Download the qcow2 image to your local system once ready:

Copy the image to your working server

Compress the qcow2 image for faster performance:

Login to OCP cli:

Use below command to upload the image:

virtctl image-upload dv rhel9-with-fs --size=30Gi --image-path=/home/bsahu/composer-api-37841dfb-f81c-4a11-be2f-e463f59dcf29-disk.qcow2.gz --force-bind --storage-class=lvms-vg1 --access-mode=ReadWriteOnce --insecure

*** I was using 4.15 OCP and topolvm.io as my storage class and was getting "Data Volume failed to initiate upload" while doing through the OCP console. Checked with experts and got to know that "since TopoLVM is WaitForFIrstConsumer, I suspect the issue is that there is no consumer and thus the volume won't bind and the pod won't start". The suggestion was to use "--force-bind" flag.

You will see PVC , PV and cdi-upload pod status on OCP console:

Create a VM:

Virtualization -> VirtualMachines -> Create from Template -> Select rhel9 -> Customize VM -> Select Disk -> Edit rootdisk -> Use existing PVC -> Create VM

Go to Scripts and update the cloud-init data to initialize with your specific username.

You will see PVC , PV and virt-launcher pod status on OCP console:

You will see VM is running.

Login to console and check the rhel version and file system:

File system on console:

Resource usage of VM:

Links to refer:

https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html-single/creating_customized_images_by_using_insights_image_builder/index#proc_creating-a-customized-rhel-guest-system-image-using-image-builder_assembly_creating-a-customized-rhel-guest-image-using-red-hat-image-builder

https://docs.openshift.com/container-platform/4.15/virt/getting_started/virt-using-the-cli-tools.html

https://docs.openshift.com/container-platform/4.15/cli_reference/openshift_cli/getting-started-cli.html

https://docs.openshift.com/container-platform/4.15/virt/virtual_machines/creating_vms_custom/virt-creating-vms-uploading-images.html

Windows VM

This is a 3 mins video which will walk you through creating an windows VM: https://youtu.be/Kty3hUBwk54

Supported and Certified guests: https://access.redhat.com/articles/973163#thirdpartyguests

Automating Windows VM creation with OpenShift Virtualization: https://www.youtube.com/watch?v=-xBSW8bNb-U

Creating a Golden Image for Windows VMs in OpenShift Virtualization: https://www.redhat.com/en/blog/creating-a-golden-image-for-windows-vms-in-openshift-virtualization