Deckhouse virtualization module

Description

This module is designed to run and manage virtual machines and their resources on the Deckhouse platform.

It offers the following features:

• A simple and intuitive interface for declarative creation and management of virtual machines and their resources.
• The ability to run legacy applications that for some reason cannot or are difficult to run in a container.
• Ability to run applications that require non-Linux operating systems.
• Ability to run virtual machines and containerized applications in the same environment.
• Integration with the existing Deckhouse ecosystem to leverage its capabilities for virtual machines.

Requirements

The following conditions are required to run the module:

• A processor with x86_64 architecture and support for Intel-VT or AMD-V instructions.
• Cluster resource requirements and configuration specifics are available for reading on this page.
• Any compatible Linux-based OS is supported for installation.
• The Linux kernel on the cluster nodes must be version 5.7 or newer.
• The CNI Cilium module to provide network connectivity for virtual machines.
• Modules SDS-DRBD or CEPH-CSI for storing virtual machine data. It is also possible to use other storage options that support the creation of block devices with RWX (ReadWriteMany) access mode.

The command line utility d8 is used to create cluster resources and connect to virtual machines. For users of the EE-version the ability to manage resources via UI is available.

What do I need to enable the module?

Procedure for enabling the module

1. Configure the deckhouse cluster
2. Enable the CNI Cilium module
3. Install and configure SDS-DRBD/CEPH/etc storage
4. Enable the virtualization module

Architecture

The module includes the following components:

• The module core, based on the KubeVirt project and uses QEMU/KVM + libvirtd to run virtual machines.
• Deckhouse Virtualization Container Registry (DVCR) - repository for storing and caching virtual machine images.
• Virtualization-API - controller that implements a user API for creating and managing virtual machine resources.

The API provides capabilities for creating and managing the following resources:

• Virtual Images
• Virtual Disks
• Virtual machines
• Virtual Machine Operations

How to enable module

Example of ModuleConfig to enable the virtualization module

apiVersion: deckhouse.io/v1alpha1
kind: ModuleConfig
metadata:
  name: virtualization
spec:
  enabled: true
  settings:
    dvcr:
      storage:
        persistentVolumeClaim:
          size: 50G # size of DVCR storage
        type: PersistentVolumeClaim
    virtualMachineCIDRs:
      - 10.66.10.0/24
      - 10.66.20.0/24
      - 10.66.30.0/24
  version: 1