安装虚拟机运行时支持

1. 准备工作
   1. 下载kubectl和kubeconfig
      1. 从集群控制台下载客户端kubectl和用户配置文件kubeconfig，并将它们拷贝到客户端机器的/home目录下。
      2. 登录到您的客户端机器，配置kubectl:

         cd /home
         chmod +x kubectl
         mv -f kubectl /usr/local/bin
         mkdir -p $HOME/.kube
         mv -f kubeconfig.json $HOME/.kube/config
         kubectl config use-context internal

      3. 配置完成后，可以通过以下命令查看Kubernetes集群信息：

         kubectl cluster-info

   2. 执行以下命令获取KubeVirt的最新版本号：

      export VERSION=v1.5.0

2. 在集群的API Server添加Aggregation Layer证书转发

   登录到集群管理节点的manifests目录/var/paas/kubernetes/manifests，编辑kube-apiserver.manifest文件，添加以下参数，进行修改API Server配置：

   --proxy-client-key-file=/srv/kubernetes/aggregation-tls.key
   --proxy-client-cert-file=/srv/kubernetes/aggregation-tls.crt

3. 安装kubevirt-operator
   在客户端机器的/home目录中，执行以下命令：

   kubectl create -f "https://github.com/kubevirt/kubevirt/releases/download/${VERSION}/kubevirt-operator.yaml"

   如安装成功，您将看到如下输出：

   namespace/kubevirt created
   customresourcedefinition.apiextensions.k8s.io/kubevirts.kubevirt.io created
   priorityclass.scheduling.k8s.io/kubevirt-cluster-critical created
   clusterrole.rbac.authorization.k8s.io/kubevirt.io:operator created
   serviceaccount/kubevirt-operator created
   role.rbac.authorization.k8s.io/kubevirt-operator created
   rolebinding.rbac.authorization.k8s.io/kubevirt-operator-rolebinding created
   clusterrole.rbac.authorization.k8s.io/kubevirt-operator created
   clusterrolebinding.rbac.authorization.k8s.io/kubevirt-operator created
   deployment.apps/virt-operator created

4. 安装KubeVirt CR
   1. 下载并修改kubevirt的CR文件
      1. 下载KubeVirt的CR文件：

         curl -L https://github.com/kubevirt/kubevirt/releases/download/${VERSION}/kubevirt-cr.yaml -o kubevirt-cr-cce.yaml

      2. 编辑kubevirt-cr-cce.yaml文件，添加以下内容：

         apiVersion: kubevirt.io/v1
         kind: KubeVirt
         metadata:
           name: kubevirt
           namespace: kubevirt
         spec:
           certificateRotateStrategy: {}
           configuration:
             developerConfiguration: {}
           customizeComponents:
             patches:
               - resourceType: DaemonSet
                 resourceName: virt-handler
                 patch: '{"spec": {"template": {"spec": {
                     "volumes": [
                       {"name": "kubelet-pods", "hostPath": {"path": "/mnt/paas/kubernetes/kubelet/pods"}},
                       {"name": "kubelet-pods-shortened", "hostPath": {"path": "/mnt/paas/kubernetes/kubelet/pods"}},
                       {"name": "device-plugin", "hostPath": {"path": "/mnt/paas/kubernetes/kubelet/device-plugins"}}
                     ],
                     "containers": [{
                       "name": "virt-handler",
                       "volumeMounts": [
                         {"name": "kubelet-pods", "mountPath": "/mnt/paas/kubernetes/kubelet/pods", "mountPropagation": "Bidirectional"},
                         {"name": "device-plugin", "mountPath": "/mnt/paas/kubernetes/kubelet/device-plugins"}
                       ]
                     }]
                   }}}}'
                 type: strategic
             flags:
               handler:
                 kubelet-pods-dir: /mnt/paas/kubernetes/kubelet/pods
                 kubelet-root: /mnt/paas/kubernetes/kubelet

      3. 保存修改并执行：

         kubectl create -f ./kubevirt-cr-cce.yaml

         如顺利执行，您将看到以下输出：

         kubevirt.kubevirt.io/kubevirt created
         kubevirt.kubevirt.io/kubevirt created

   2. 等待安装情况

      watch -n 1 kubectl get kubevirt.kubevirt.io/kubevirt -n kubevirt -o=jsonpath="{.status.phase}"

      当状态从Deploying变为Deployed时，表示安装成功。

5. 确认硬件虚拟化支持
   1. 执行以下命令安装虚拟化管理软件包libvirt-client：

      sudo apt-get install libvirt-client

   2. 使用以下命令，验证服务器是否支持虚拟化：

      virt-host-validate qemu

      • 如果出现以下情况，则表示服务器不支持硬件虚拟化：

        QEMU: Checking for hardware virtualization: FAIL (Only emulated CPUs are available, performance will be significantly limited)

      • 如果出现FAIL，可以打开KubeVirt的软件模拟，但请注意性能会显著下降：

        kubectl -n kubevirt patch kubevirt kubevirt --type=merge --patch '{"spec":{"configuration":{"developerConfiguration":{"useEmulation":true}}}}'

6. 安装virtctl

   执行以下命令，安装KubeVirt命令行工具virtctl：

   VERSION=$(kubectl get kubevirt.kubevirt.io/kubevirt -n kubevirt -o=jsonpath="{.status.observedKubeVirtVersion}")
   ARCH=$(uname -s | tr A-Z a-z)-$(uname -m | sed 's/x86_64/amd64/') || windows-amd64.exe
   echo ${VERSION}-${ARCH}
   curl -L -o virtctl https://github.com/kubevirt/kubevirt/releases/download/${VERSION}/virtctl-${VERSION}-${ARCH}
   chmod +x virtctl
   sudo install virtctl /usr/local/bin

以上步骤将帮助您在UCS本地集群上成功启用VM Runtime。如果您在安装过程中遇到任何问题，请参阅KubeVirt的官方文档或联系华为云技术支持。