1eae56ba7f
Update Kata containers docs Fix conflict Story: 2010765 Task: 49554 Change-Id: I07e31de31baca504e073efc5358ab664d9355909 Signed-off-by: Elisamara Aoki Goncalves <elisamaraaoki.goncalves@windriver.com>
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1.6 KiB
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55 lines
1.6 KiB
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.. ihj1591797204756
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.. _known-limitations:
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================================
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Known Kata Container Limitations
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================================
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This section describes the known limitations when using Kata containers.
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.. _known-limitations-section-tsh-tl1-zlb:
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--------------
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SR-IOV Support
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--------------
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A minimal **kernel** and **rootfs** for Kata containers are shipped with
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|prod-long|, and can be found at ``/usr/share/kata-containers/``. To enable
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certain kernel features such as :abbr:`IOMMU (I/O memory management unit)`, and
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desired network kernel modules, a custom kernel image, and rootfs has to be
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built. However, many tests carried out using this solution were unsuccessful.
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More details of this solution can be seen in:
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https://bugs.launchpad.net/starlingx/+bug/1867927.
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.. _known-limitations-section-ngp-ty3-bmb:
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-------------------
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CPU Manager Support
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-------------------
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Kata containers currently occupy only the platform cores. There is no
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:abbr:`CPU (Central Processing Unit)` manager support.
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.. _known-limitations-section-wcd-xy3-bmb:
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---------
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Hugepages
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---------
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.. _known-limitations-ul-uhz-xy3-bmb:
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- Similar to the |SRIOV| limitation, hugepage support must be configured in a
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custom Kata kernel.
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- The size and number of hugepages must be written using the
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:command:`io.katacontainers.config.hypervisor.kernel_params` annotation.
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- Creating a ``hugetlbfs`` mount for hugepages in the Kata container is
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specific to the end user application.
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.. note::
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This solution does not work in version v3.1.3 of the Kata Containers. A
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pod can be started with hugepages specified, but none are actually
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allocated to the Kata |VM|. |