安装依赖和前提条件¶
本页说明安装云主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¶
操作系统内核版本需要在 4.11 以上¶
目标集群所有节点的操作系统内核版本需要大于 4.11（详见 kubevirt issue）。 运行以下命令查看内核版本：
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¶
使用以下脚本检查当前节点的 CPU 是否支持：
Note
若出现与输出信息无关的报错（如下所示），可无需关注，不影响最终结果。
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）¶
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运行以下命令检查：
# 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：
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硬件虚拟化启用方法：
不同平台启用硬件虚拟化的方法也不一样，以 vsphere 为例， 方法请参照 vmware 官网文档。
如果使用 Docker Engine 作为容器运行时¶
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
建议开启 IOMMU¶
为了后续功能做准备，建议开启 IOMMU。