Run Cloud Virtual Machines Securely and Efficiently

Cloud Hypervisor is an open source Virtual Machine Monitor (VMM) implemented in Rust that focuses on running modern, cloud workloads, with minimal hardware emulation.

Get Started

Get the source on GitHub

Secure 🔒

Minimal emulated devices and implemented in Rust to avoid many common security issues

Fast ⚡️

Boot to userspace in less than 100ms with direct kernel boot

🪟 & 🐧

Supports running modern Linux and Windows guests

Kata Containers

Supported by Kata Containers for running secure containerised workloads

Powerful REST API

Programmatically control the lifecyle of the VM using an HTTP API

Slim

Minimal memory overhead for dense deployments

Cross platform

Runs on both x86-64 and aarch64

Broad device support

Support for wide range of paravirtualised devices and physical device passthrough

Live migration

Migrate VMs from one host to another without interruption

Get Involved:

Cloud Hypervisor is governed openly as part of the Linux Foundation and supported by multiple organisations:

  • Alibaba
  • AMD
  • Ampere
  • ARM
  • ByteDance
  • Intel
  • Microsoft
  • Tencent Cloud

Join our Slack community: Invite

Participate in our community activities: Slack channel

Check out and participate in our roadmap on GitHub

For full details of our governance model please see our community repository on GitHub and our founding charter.

For bug reports please use GitHub isssues; for broader community discussions please use our mailing list

Latest news from Cloud Hypervisor project:

Cloud Hypervisor v42.0 Released!

Posted October 25, 2024 by Cloud Hypervisor Team ‐ 1 min read

This release has been tracked in our roadmap project as iteration v42.0. The following user visible changes have been made:

SVE/SVE2 Support on AArch64

The SVE and SVE2 feature bits are now propagated through to the guest on AArch64. (#6678, #6691)

Notable Bug Fixes

  • Reduce latency notification when rate limited (#6672)
  • Fix virtio-console resizing (#6704)
  • Fix resizing when console uses TTY (#6754)
  • Avoid deadlock in PCI BAR reprogramming that can occur when adding a new virtio device to a VM that has been restored (#6775)
  • Fix console resizing after VM restore (#6748)
  • Fix memory resize error due to incorrect bounds checks (#6736)

Sponsorships

During this release cycle a new VFIO CI worker has been provided by Crusoe Energy and a new ARM64 CI worker has been provided by Ubicloud.

Contributors

Many thanks to everyone who has contributed to our release:

Download

See the GitHub Release for the release assets.