[没接触过kubevirt（]15分钟快速入门kubevirt） [没接触过kubevirt？]15分钟快速

@TOC
本文介绍本文有两个版本，详细版、简洁版。
前者适合新手，后者适合老手（方便大家查找，从而过滤掉某些步骤，节约时间成本）所以大家按需查看哟。

详细版	简洁版

简洁版：包含所有步骤，以及命令的执行过程（适合新手）
简洁版：只包含命令（适合有一定熟练度的人）

前言

什么是kubevirt？
kubevirt是一个容器方式运行虚拟机的项目。kubevirt是附加kubernetes集群上的，它是通过 CustomResourceDefinition（CRD）部署到Kubernetes API变成资源对象。使用方式类似创建deploy、pod......这些资源清单。

环境准备

环境保证网络出外网

系统	服务
centos7	kubernetes集群

官网地址：https://kubevirt.io/

详细版

搭建步骤
安装KubeVirt

[root@master ~]# export RELEASE=v0.35.0 [root@master ~]# kubectl apply -f https://github.com/kubevirt/kubevirt/releases/download/${RELEASE}/kubevirt-operator.yaml [root@master ~]# kubectl apply -f https://github.com/kubevirt/kubevirt/releases/download/${RELEASE}/kubevirt-cr.yaml [root@master ~]# kubectl get pods -n kubevirt NAMEREADYSTATUSRESTARTSAGE virt-api-64999f7bf5-fblkh1/1Running05m24s virt-api-64999f7bf5-l8wzr1/1Running05m24s virt-controller-8696ccdf44-k9qpv1/1Running04m52s virt-controller-8696ccdf44-tpxwp1/1Running04m52s virt-handler-kl8tl1/1Running04m52s virt-operator-78fbcdfdf4-468h41/1Running08m4s virt-operator-78fbcdfdf4-nvvxx1/1Running08m4s

所以服务启动后，执行下面这条命令

[root@master ~]# kubectl -n kubevirt wait kv kubevirt --for condition=Available kubevirt.kubevirt.io/kubevirt condition met

安装virtctl客户端工具

[root@master ~]# export VERSION=v0.41.0 [root@master ~]# wget https://github.com/kubevirt/kubevirt/releases/download/${VERSION}/virtctl-${VERSION}-linux-amd64 [root@master kubevirt]# cp virtctl-v0.41.0-linux-amd64 /usr/local/bin/virtctl [root@master kubevirt]# chmod +x /usr/local/bin/virtctl ; ll /usr/local/bin/ total 64000 -r-xr-xr-x. 1 root root 17586312 Jan 11 10:52 docker-compose -rwxr-xr-x. 1 root root 47944250 Apr 16 16:58 virtctl [root@master kubevirt]# virtctl version Client Version: version.Info{GitVersion:"v0.41.0", GitCommit:"b77b858ac9345ae6858cf409e1833f4548ec2809", GitTreeState:"clean", BuildDate:"2020-11-09T13:38:36Z", GoVersion:"go1.13.14", Compiler:"gc", Platform:"linux/amd64"} Server Version: version.Info{GitVersion:"{gitVersion}", GitCommit:"{gitCommit}", GitTreeState:"{gitTreeState}", BuildDate:"{buildDate}", GoVersion:"go1.13.14", Compiler:"gc", Platform:"linux/amd64"}

创建VirtualMachine

VirtualMachine(vm)类似于docker镜像一个模板可以启动很多运行实例vmi：

[root@master kubevirt]# cat test.yaml apiVersion: kubevirt.io/v1alpha3 kind: VirtualMachine metadata: labels: kubevirt.io/vm: vm-cirros name: vm-cirros spec: running: false template: metadata: labels: kubevirt.io/vm: vm-cirros spec: domain: devices: disks: - disk: bus: virtio name: containerdisk - disk: bus: virtio name: cloudinitdisk machine: type: "" resources: requests: memory: 64M terminationGracePeriodSeconds: 0 volumes: - name: containerdisk containerDisk: image: kubevirt/cirros-container-disk-demo:latest - cloudInitNoCloud: userDataBase64: IyEvYmluL3NoCgplY2hvICdwcmludGVkIGZyb20gY2xvdWQtaW5pdCB1c2VyZGF0YScK name: cloudinitdisk [root@master kubevirt]# kubectl apply -f test.yaml virtualmachine.kubevirt.io/vm-cirros created[root@master kubevirt]# kubectl get vm NAMEAGEVOLUME vm-cirros21m

启动VirtualMachineInstance

VirtualMachineInstance（vmi）类似于docker镜像的运行实例容器：

[root@master kubevirt]# virtctl start vm-cirros VM vm-cirros was scheduled to start [root@master kubevirt]# kubectl get vmi NAMEAGEPHASEIPNODENAME vm-cirros62sRunning10.244.0.15master[root@master kubevirt]# virtctl console vm-cirros# 进入虚拟机 Successfully connected to vm-cirros console. The escape sequence is ^]login as 'cirros' user. default password: 'gocubsgo'. use 'sudo' for root. vm-cirros login: cirros Password: $ ip a 1: lo: mtu 65536 qdisc noqueue qlen 1 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: eth0: mtu 1450 qdisc pfifo_fast qlen 1000 link/ether 2e:3e:2a:46:29:94 brd ff:ff:ff:ff:ff:ff inet 10.244.0.16/24 brd 10.244.0.255 scope global eth0 valid_lft forever preferred_lft forever inet6 fe80::2c3e:2aff:fe46:2994/64 scope link tentative flags 08 valid_lft forever preferred_lft forever$#按 ctrl+]退出虚拟机 $ [root@master kubevirt]#

启动和停止命令 spec.running 字段如果设置为true为启动、false为停止**

创建 VirtualMachine 后，可以像这样打开或关闭它：

# Start the virtual machine:启动虚拟机 virtctl start vm# Stop the virtual machine:停止虚拟机 virtctl stop vm

kubectl也可以使用：

# Start the virtual machine:启动虚拟机 kubectl patch virtualmachine vm --type merge -p \ '{"spec":{"running":true}}'# Stop the virtual machine:停止虚拟机 kubectl patch virtualmachine vm --type merge -p \ '{"spec":{"running":false}}'

vm作为服务公开 【[没接触过kubevirt（]15分钟快速入门kubevirt）】VirtualMachine 可以作为服务公开。实际服务将在 VirtualMachineInstance 启动后可用。
例如，在创建 VirtualMachine 后，将 SSH 端口 (22) 公开为NodePort服务

[root@master kubevirt]# virtctl expose virtualmachinevm-cirros --name vmiservice-node--target-port 22--port 24 --type NodePort Service vmiservice-node successfully exposed for virtualmachine vm-cirros [root@master kubevirt]# kubectl get svc NAMETYPECLUSTER-IPEXTERNAL-IPPORT(S)AGE kubernetesClusterIP10.96.0.1443/TCP95d vmiservice-nodeNodePort10.106.62.19124:31912/TCP3s

最后使用远程工具连接即可：
注意端口使用svc NodePort端口**，如图所示：

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文章图片

简洁版

安装KubeVirt

export RELEASE=v0.35.0 kubectl apply -f https://github.com/kubevirt/kubevirt/releases/download/${RELEASE}/kubevirt-operator.yaml kubectl apply -f https://github.com/kubevirt/kubevirt/releases/download/${RELEASE}/kubevirt-cr.yaml kubectl get pods -n kubevirt

kubectl -n kubevirt wait kv kubevirt --for condition=Available

安装virtctl客户端工具

export VERSION=v0.41.0 wget https://github.com/kubevirt/kubevirt/releases/download/${VERSION}/virtctl-${VERSION}-linux-amd64 cp virtctl-v0.41.0-linux-amd64 /usr/local/bin/virtctl chmod +x /usr/local/bin/virtctl ; ll /usr/local/bin/ virtctl version

创建VirtualMachine

[root@master kubevirt]# cat test.yaml apiVersion: kubevirt.io/v1alpha3 kind: VirtualMachine metadata: labels: kubevirt.io/vm: vm-cirros name: vm-cirros spec: running: false template: metadata: labels: kubevirt.io/vm: vm-cirros spec: domain: devices: disks: - disk: bus: virtio name: containerdisk - disk: bus: virtio name: cloudinitdisk machine: type: "" resources: requests: memory: 64M terminationGracePeriodSeconds: 0 volumes: - name: containerdisk containerDisk: image: kubevirt/cirros-container-disk-demo:latest - cloudInitNoCloud: userDataBase64: IyEvYmluL3NoCgplY2hvICdwcmludGVkIGZyb20gY2xvdWQtaW5pdCB1c2VyZGF0YScK name: cloudinitdisk [root@master kubevirt]# kubectl apply -f test.yaml virtualmachine.kubevirt.io/vm-cirros created[root@master kubevirt]# kubectl get vm NAMEAGEVOLUME vm-cirros21m

启动VirtualMachineInstance

virtctl start vm-cirros kubectl get vmi virtctl console vm-cirros# 进入虚拟机按 ctrl+]退出虚拟机

启动和停止命令

virtctl start vm virtctl stop vm# Start the virtual machine:启动虚拟机 kubectl patch virtualmachine vm --type merge -p \ '{"spec":{"running":true}}'# Stop the virtual machine:停止虚拟机 kubectl patch virtualmachine vm --type merge -p \ '{"spec":{"running":false}}'

vm作为服务公开

[root@master kubevirt]# virtctl expose virtualmachinevm-cirros --name vmiservice-node--target-port 22--port 24 --type NodePort [root@master kubevirt]# kubectl get svc