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Virtual Event | September 15-16, 2021
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Wednesday, September 15 • 15:05 - 15:30
Support for Fast and Reliable VMM Live Upgrades in Libvirt - Soham Ghosh & Prachatos Mitra, Nutanix

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Upgrading VMMs with live VMs has always been a challenging problem. The currently accepted solution is live migrating VMs outside the host and then upgrading the VMM before the VMs are migrated back. This enforces the cloud infrastructure to maintain spare resources on other nodes to accommodate the incoming VMs. Along with this it incurs huge cost on the upgrade time as well as network usage. In an effort to reduce these costs we propose a novel approach in the upgrade workflow, which can upgrade the VMM without the need to migrate VMs outside of the host. This talk focuses on how with minimal changes in the existing libvirt migration workflow we can transfer the VMs to the new upgraded qemu binary with minimal downtime while preserving external connections and device states.

avatar for Soham Ghosh

Soham Ghosh

Member of Technical Staff, Red Hat Israel
Soham is a software engineer working for the hypervisor team in Nutanix with interests in areas of virtualization, performance and live migration. Soham completed his M.E degree in Computer Science from IISc.

Prachatos Mitra

Member of Technical Staff, Advanced Micro Devices
Prachatos is a software engineer working for the hypervisor team in Nutanix with interests in areas of virtualization, operating systems and live migration. Prachatos completed his M.Tech degree in Computer Science from IISc.

Wednesday September 15, 2021 15:05 - 15:30 UTC
  KVM Track 2
  • Presentation Slides Attached Yes