[没接触过kubevirt？]15分钟快速入门kubevirt |
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[没接触过kubevirt？]15分钟快速入门kubevirt
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@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。 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 NAME READY STATUS RESTARTS AGE virt-api-64999f7bf5-fblkh 1/1 Running 0 5m24s virt-api-64999f7bf5-l8wzr 1/1 Running 0 5m24s virt-controller-8696ccdf44-k9qpv 1/1 Running 0 4m52s virt-controller-8696ccdf44-tpxwp 1/1 Running 0 4m52s virt-handler-kl8tl 1/1 Running 0 4m52s virt-operator-78fbcdfdf4-468h4 1/1 Running 0 8m4s virt-operator-78fbcdfdf4-nvvxx 1/1 Running 0 8m4s 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 NAME AGE VOLUME vm-cirros 21m 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 NAME AGE PHASE IP NODENAME vm-cirros 62s Running 10.244.0.15 master [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 virtualmachine vm-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 NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE kubernetes ClusterIP 10.96.0.1 443/TCP 95d vmiservice-node NodePort 10.106.62.191 24:31912/TCP 3s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：
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 NAME AGE VOLUME vm-cirros 21m 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 virtualmachine vm-cirros --name vmiservice-node --target-port 22 --port 24 --type NodePort [root@master kubevirt]# kubectl get svc |
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