Chapter 3. OpenShift Virtualization architecture

Validates the

HyperConverged

Provides the

virtctl

Contains all operators, CRs, and objects needed by OpenShift Virtualization.

An SSP CR. This is automatically created by the HCO.

A CDI CR. This is automatically created by the HCO.

A CR that instructs and is managed by the

cluster-network-addons-operator

Manages the authorization to upload VM disks into PVCs by issuing secure upload tokens.

Directs external disk upload traffic to the appropriate upload server pod so that it can be written to the correct PVC. Requires a valid upload token.

Helper pod that imports a virtual machine image into a PVC when creating a data volume.

Manages TLS certificates of Kubemacpool’s webhooks.

Provides a MAC address pooling service for virtual machine (VM) network interface cards (NICs).

Marks network bridges available on nodes as node resources.

Installs CNI plugins on cluster nodes, enabling the attachment of VMs to Linux bridges through network attachment definitions.

Provides a worker for each node where the hostpath provisioner (HPP) is designated to run. The pods mount the specified backing storage on the node.

Implements the Container Storage Interface (CSI) driver interface of the HPP.

Implements the legacy driver interface of the HPP.

Checks

vm.kubevirt.io/validations

Creates a VM from a template.

Copies a VM template.

Creates or removes a VM template.

Creates or removes data volumes or data sources.

Runs a script or a command on a VM, then stops or deletes the VM afterward.

Runs a

customize

virt-customize

Runs a

sysprep

virt-sysprep

Waits for a specific VMI status, then fails or succeeds according to that status.

HTTP API server that serves as the entry point for all virtualization-related flows.

Observes the creation of a new VM instance object and creates a corresponding pod. When the pod is scheduled on a node,

virt-controller

Monitors any changes to a VM and instructs

virt-launcher

Contains the VM that was created by the user as implemented by

libvirt

qemu