Long-Term Supported Versions

    Innovation Versions

      Preparing the Environment



      • StratoVirt supports only Linux VMs that use the x86_64 or AArch64 processor architecture and start the VM with same architecture.
      • StratoVirt can be compiled, commissioned, and deployed only on openEuler 20.09 and later versions.
      • StratoVirt can run with non-root permissions.

      Environment Requirements

      The following environment is required for running StratoVirt:

      • /dev/vhost-vsock device (for implementing the MMIO)
      • Nmap tool
      • Kernel image and rootfs image

      Preparing Devices and Tools

      • StratoVirt needs to implement the MMIO device. Therefore, before running StratoVirt, ensure that the /dev/vhost-vsock device exists.

        Check whether the device exists.

        $ ls /dev/vhost-vsock

        If the device does not exist, run the following command to generate the /dev/vhost-vsock device:

        $ modprobe vhost_vsock
      • To use QMP commands, install the nmap tool. After configuring the yum source, run the following command to install the nmap tool:

        # yum install nmap

      Preparing Images

      Creating the Kernel Image

      The StratoVirt of the current version supports only the PE kernel image of the x86_64 and AArch64 platforms. The kernel image in PE format can be generated by using the following method:

      1. Run the following command to obtain the kernel source code of the openEuler:

        $ git clone https://gitee.com/openeuler/kernel
        $ cd kernel
      2. Run the following command to check and switch the kernel version to 4.19:

        $ git checkout kernel-4.19
      3. Configure and compile the Linux kernel. It is better to use the recommended configuration file (Obtain configuration file). Copy it to the kernel directory, and rename it as .config. You can also run the following command to configure the kernel as prompted:

        $ make menuconfig
      4. Run the following command to create and convert the kernel image to the PE format. The converted image is vmlinux.bin.

        $ make -j vmlinux && objcopy -O binary vmlinux vmlinux.bin

        After the compilation is complete, the kernel image vmlinux.bin is generated in the current directory.

      Creating the Rootfs Image

      The rootfs image is a file system image. When the StratoVirt is started, the ext4 image with init can be loaded. To create an ext4 rootfs image, perform the following steps:

      1. Prepare a file with a proper size (for example, create a file with the size of 10 GiB in /home).

        $ cd /home
        $ dd if=/dev/zero of=./rootfs.ext4 bs=1G count=10
      2. Create an empty ext4 file system on this file.

        $ mkfs.ext4 ./rootfs.ext4
      3. Mount the file image. Create the /mnt/rootfs directory and mount rootfs.ext4 to the /mnt/rootfs directory as user root.

        $ mkdir /mnt/rootfs
        $ cd /home
        $ sudo mount ./rootfs.ext4 /mnt/rootfs && cd /mnt/rootfs
      4. Obtain the latest alpine-mini rootfs of the corresponding processor architecture.

        • If the AArch64 processor architecture is used, run the following command:

          $ wget http://dl-cdn.alpinelinux.org/alpine/latest-stable/releases/aarch64/alpine-minirootfs-3.12.0-aarch64.tar.gz
          $ tar -zxvf alpine-minirootfs-3.12.0-aarch64.tar.gz
          $ rm alpine-minirootfs-3.12.0-aarch64.tar.gz
        • For the x86_64 processor architecture, run the following command:

          $ wget http://dl-cdn.alpinelinux.org/alpine/latest-stable/releases/x86_64/alpine-minirootfs-3.12.0-x86_64.tar.gz
          $ tar -zxvf alpine-minirootfs-3.12.0-x86_64.tar.gz
          $ rm alpine-minirootfs-3.12.0-x86_64.tar.gz
      5. Run the following command to create a simple /sbin/init for the ext4 file image:

        $ rm sbin/init; touch sbin/init && cat > sbin/init <<EOF
        #! /bin/sh
        mount -t devtmpfs dev /dev
        mount -t proc proc /proc
        mount -t sysfs sysfs /sys
        ip link set up dev lo
        exec /sbin/getty -n -l /bin/sh 115200 /dev/ttyS0
        poweroff -f
        sudo chmod +x sbin/init
      6. Uninstall the rootfs image.

        $ cd /home; umount /mnt/rootfs

        Then, the rootfs is created successfully. You can use the ext4 rootfs image file rootfs.ext4, which is stored in the /home directory.

      Bug Catching

      Buggy Content

      Bug Description

      Submit As Issue

      It's a little complicated....

      I'd like to ask someone.


      Just a small problem.

      I can fix it online!

      Bug Type
      Specifications and Common Mistakes

      ● Misspellings or punctuation mistakes;

      ● Incorrect links, empty cells, or wrong formats;

      ● Chinese characters in English context;

      ● Minor inconsistencies between the UI and descriptions;

      ● Low writing fluency that does not affect understanding;

      ● Incorrect version numbers, including software package names and version numbers on the UI.


      ● Incorrect or missing key steps;

      ● Missing prerequisites or precautions;

      ● Ambiguous figures, tables, or texts;

      ● Unclear logic, such as missing classifications, items, and steps.


      ● Technical principles, function descriptions, or specifications inconsistent with those of the software;

      ● Incorrect schematic or architecture diagrams;

      ● Incorrect commands or command parameters;

      ● Incorrect code;

      ● Commands inconsistent with the functions;

      ● Wrong screenshots.

      Risk Warnings

      ● Lack of risk warnings for operations that may damage the system or important data.

      Content Compliance

      ● Contents that may violate applicable laws and regulations or geo-cultural context-sensitive words and expressions;

      ● Copyright infringement.

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      Bug Catching
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