安装依赖和前提条件¶

本页说明安装虚拟机模块的依赖和前提条件。

Info

下述命令或脚本内出现的 virtnest 字样是全局管理模块的内部开发代号。

前提条件¶

目标集群所有节点的操作系统内核版本需要大于 3.15。您可以通过运行以下命令查看内核版本：

操作系统内核版本需要在 3.15 以上。

uname -a

示例输出：

Linux master 6.5.3-1.el7.elrepo.x86_64 #1 SMP PREEMPT_DYNAMIC Wed Sep 13 11:46:28 EDT 2023 x86_64 x86_64 x86_64 GNU/Linux

CPU 需支持 x86-64-v2 及以上的指令集。您可以使用以下脚本检查当前节点的 CPU 是否支持：

cat <<EOF > detect-cpu.sh
#!/bin/sh -eu

flags=$(cat /proc/cpuinfo | grep flags | head -n 1 | cut -d: -f2)

supports_v2='awk "/cx16/&&/lahf/&&/popcnt/&&/sse4_1/&&/sse4_2/&&/ssse3/ {found=1} END {exit !found}"'
supports_v3='awk "/avx/&&/avx2/&&/bmi1/&&/bmi2/&&/f16c/&&/fma/&&/abm/&&/movbe/&&/xsave/ {found=1} END {exit !found}"'
supports_v4='awk "/avx512f/&&/avx512bw/&&/avx512cd/&&/avx512dq/&&/avx512vl/ {found=1} END {exit !found}"'

echo "$flags" | eval $supports_v2 || exit 2 && echo "CPU supports x86-64-v2"
echo "$flags" | eval $supports_v3 || exit 3 && echo "CPU supports x86-64-v3"
echo "$flags" | eval $supports_v4 || exit 4 && echo "CPU supports x86-64-v4"
EOF
chmod +x detect-cpu.sh
sh detect-cpu.sh

所有节点必须启用硬件虚拟化（嵌套虚拟化）。您可以通过运行以下命令检查：

virt-host-validate qemu

# 成功的情况
QEMU: Checking for hardware virtualization                                 : PASS
QEMU: Checking if device /dev/kvm exists                                   : PASS
QEMU: Checking if device /dev/kvm is accessible                            : PASS
QEMU: Checking if device /dev/vhost-net exists                             : PASS
QEMU: Checking if device /dev/net/tun exists                               : PASS
QEMU: Checking for cgroup 'cpu' controller support                         : PASS
QEMU: Checking for cgroup 'cpuacct' controller support                     : PASS
QEMU: Checking for cgroup 'cpuset' controller support                      : PASS
QEMU: Checking for cgroup 'memory' controller support                      : PASS
QEMU: Checking for cgroup 'devices' controller support                     : PASS
QEMU: Checking for cgroup 'blkio' controller support                       : PASS
QEMU: Checking for device assignment IOMMU support                         : PASS
QEMU: Checking if IOMMU is enabled by kernel                               : PASS
QEMU: Checking for secure guest support                                    : WARN (Unknown if this platform has Secure Guest support)

# 失败的情况
QEMU: Checking for hardware virtualization                                 : FAIL (Only emulated CPUs are available, performance will be significantly limited)
QEMU: Checking if device /dev/vhost-net exists                             : PASS
QEMU: Checking if device /dev/net/tun exists                               : PASS
QEMU: Checking for cgroup 'memory' controller support                      : PASS
QEMU: Checking for cgroup 'memory' controller mount-point                  : PASS
QEMU: Checking for cgroup 'cpu' controller support                         : PASS
QEMU: Checking for cgroup 'cpu' controller mount-point                     : PASS
QEMU: Checking for cgroup 'cpuacct' controller support                     : PASS
QEMU: Checking for cgroup 'cpuacct' controller mount-point                 : PASS
QEMU: Checking for cgroup 'cpuset' controller support                      : PASS
QEMU: Checking for cgroup 'cpuset' controller mount-point                  : PASS
QEMU: Checking for cgroup 'devices' controller support                     : PASS
QEMU: Checking for cgroup 'devices' controller mount-point                 : PASS
QEMU: Checking for cgroup 'blkio' controller support                       : PASS
QEMU: Checking for cgroup 'blkio' controller mount-point                   : PASS
WARN (Unknown if this platform has IOMMU support)

安装 virt-host-validate：

在 CentOS 上安装：

yum install -y qemu-kvm libvirt virt-install bridge-utils

在 Ubuntu 上安装：

apt install qemu-kvm libvirt-daemon-system libvirt-clients bridge-utils

如果集群使用 Docker Engine 作为容器运行时，则 Docker Engine 版本需要大于 20.10.10。并且为了后续功能做准备，建议开启 IOMMU。

安装依赖和前提条件¶

前提条件¶

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