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docs/doc/source/usertasks/kubernetes/known-limitations.rst
Keane Lim 21b11b47d6 OpenStack VNF Integration User Tasks 
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Minor abbreviation fix
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Change-Id: I8940d3572b789990d3b5f2d201f8ec8a46ce2943
Signed-off-by: Keane Lim <keane.lim@windriver.com>
2021-03-23 11:10:42 -04:00

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Known Kata Container Limitations

This section describes the known limitations when using Kata containers.

SR-IOV Support

A minimal kernel and rootfs for Kata containers are shipped with , and are present at /usr/share/kata-containers/. To enable certain kernel features such as IOMMU (I/O memory management unit), and desired network kernel modules, a custom kernel image, and rootfs has to be built. For more information, see https://katacontainers.io/.

CPU Manager Support

Kata containers currently occupy only the platform cores. There is no CPU (Central Processing Unit) manager support.

Hugepages

  • Similar to the SR-IOV limitation, hugepage support must be configured in a custom Kata kernel.
  • The size and number of hugepages must be written using the io.katacontainers.config.hypervisor.kernel\_params annotation.
  • Creating a hugetlbfs mount for hugepages in the Kata container is specific to the end user application.