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Nested Virtualization Without the Nest

Abstract : With the increasing popularity of containers, managing them on top of virtual machines becomes a common practice, called nested virtualization. This paper presents BrFusion and Hostlo, two solutions that address each of two networking issues of nested virtualization: network virtualization duplication and virtual machine-bounded pod deployments. The first issue lengthens network packet paths while the second issue leads to resource fragmentation. For instance, in respect with the first issue, we measured a throughput degradation of about 68% and a latency increase of about 31% in comparison with a single networking layer. We prototype BrFusion and Hostlo in Linux KVM/QEMU, Docker and Kubernetes systems. The evaluation results show that BrFusion leads to the same performance as a single-layer virtualization deployment. Concerning Hostlo, the results show that more than 11% of cloud clients see their cloud utilization cost reduced by down to 40%.
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Submitted on : Thursday, September 24, 2020 - 9:49:16 AM
Last modification on : Thursday, August 4, 2022 - 4:53:09 PM
Long-term archiving on: : Thursday, December 3, 2020 - 4:35:28 PM


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  • HAL Id : hal-02947732, version 1
  • OATAO : 26401


Mathieu Bacou, Grégoire Todeschi, Alain Tchana, Daniel Hagimont. Nested Virtualization Without the Nest. 48th International Conference on Parallel Processing (ICPP 2019), Aug 2019, Kyoto, Japan. pp.1-10. ⟨hal-02947732⟩



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