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128 lines
4.2 KiB
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.. _run-kata-containers:
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Run Kata Containers on a Service VM
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###################################
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This tutorial describes how to install, configure, and run `Kata Containers
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<https://katacontainers.io/>`_ on the ACRN Service VM. In this configuration,
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Kata Containers leverage the ACRN hypervisor instead of QEMU which is used by
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default. Refer to the `Kata Containers with ACRN
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<https://drive.google.com/file/d/1ZrqM5ouWUJA0FeIWhU_aitEJe8781rpe/view?usp=sharing>`_
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presentation from a previous ACRN Project Technical Community Meeting for
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more details on Kata Containers and how the integration with ACRN has been
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done.
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Prerequisites
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**************
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#. Refer to the :ref:`ACRN supported hardware <hardware>`.
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#. For a default prebuilt ACRN binary in the E2E package, you must have 4
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CPU cores or enable "CPU Hyper-Threading" in order to have 4 CPU threads for 2 CPU cores.
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#. Follow :ref:`these instructions <kbl-nuc-sdc>` to set up the ACRN Service VM.
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Install Docker
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**************
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.. code-block:: none
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$ sudo swupd bundle-add containers-basic
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$ sudo systemctl enable docker
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$ sudo systemctl start docker
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Install Kata Containers
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***********************
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The Kata Containers installation from Clear Linux's official repository does
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not work with ACRN at the moment. Therefore, you must install Kata
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Containers using the `manual installation
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<https://github.com/kata-containers/documentation/blob/master/Developer-Guide.md>`_
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instructions (using a ``rootfs`` image).
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#. Install the build dependencies.
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.. code-block:: none
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$ sudo swupd bundle-add go-basic devpkg-elfutils
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#. Install Kata Containers.
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At a high level, the `manual installation
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<https://github.com/kata-containers/documentation/blob/master/Developer-Guide.md>`_
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steps are:
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#. Build and install the Kata runtime.
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#. Create and install a ``rootfs``.
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#. Build and install the Kata Containers kernel.
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#. Build and install the Kata proxy.
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#. Build and install the Kata shim.
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Configure Kata on ACRN
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**********************
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After the core components are installed on the system, the next step is to
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configure them to work seamlessly together. This includes two parts.
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#. `Configure Docker <https://github.com/kata-containers/documentation/blob/master/Developer-Guide.md#run-kata-containers-with-docker>`_
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to recognize the ``kata-runtime`` as an additional runtime available for
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use.
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#. Configure Kata to use ACRN.
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.. code-block:: none
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$ sudo mkdir -p /etc/kata-containers
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$ sudo cp /usr/share/defaults/kata-containers/configuration-acrn.toml /etc/kata-containers/configuration.toml
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Verify that these configurations are effective by checking the following
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outputs:
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.. code-block:: none
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$ sudo docker info | grep runtime
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WARNING: the devicemapper storage-driver is deprecated, and will be
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removed in a future release.
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WARNING: devicemapper: usage of loopback devices is strongly discouraged
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for production use.
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Use `--storage-opt dm.thinpooldev` to specify a custom block storage device.
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Runtimes: kata-runtime runc
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.. code-block:: none
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$ kata-runtime kata-env | awk -v RS= '/\[Hypervisor\]/'
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[Hypervisor]
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MachineType = ""
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Version = "DM version is: 1.5-unstable-"2020w02.5.140000p_261" (daily tag:"2020w02.5.140000p"), build by mockbuild@2020-01-12 08:44:52"
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Path = "/usr/bin/acrn-dm"
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BlockDeviceDriver = "virtio-blk"
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EntropySource = "/dev/urandom"
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Msize9p = 0
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MemorySlots = 10
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Debug = false
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UseVSock = false
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SharedFS = ""
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Run a Kata Container with ACRN
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******************************
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The system is now ready to run a Kata Container on ACRN. Note that a reboot
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is recommended after the installation.
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Before running a Kata Container on ACRN, you must offline at least one CPU:
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.. code-block:: none
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$ curl -O https://raw.githubusercontent.com/kata-containers/documentation/master/how-to/offline_cpu.sh
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$ chmod +x ./offline_cpu.sh
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$ sudo ./offline_cpu.sh
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Start a Kata Container on ACRN:
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.. code-block:: none
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$ sudo docker run -ti --runtime=kata-runtime busybox sh
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If you run into problems, contact us on the ACRN mailing list and provide as
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much detail as possible about the issue. The output of ``sudo docker info``
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and ``kata-runtime kata-env`` is useful.
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