关于linux:没接触过kubevirt15分钟快速入门kubevirt

@TOC

本文介绍

本文有两个版本，具体版、简洁版。

前者适宜老手，后者适宜新手（不便大家查找，从而过滤掉某些步骤，节约工夫老本） 所以大家按需查看哟。

具体版	简洁版

简洁版：蕴含所有步骤，以及命令的执行过程（适宜老手）

简洁版：只蕴含命令（适宜有肯定熟练度的人）

前言

什么是kubevirt？
kubevirt是一个容器形式运行虚拟机的我的项目。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。应用形式相似创立deploy、pod......这些资源清单。

环境筹备

环境保障网络出外网

零碎	服务
centos7	kubernetes集群

官网地址：https://kubevirt.io/

具体版

搭建步骤

装置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 kubevirtNAME                               READY   STATUS    RESTARTS   AGEvirt-api-64999f7bf5-fblkh          1/1     Running   0          5m24svirt-api-64999f7bf5-l8wzr          1/1     Running   0          5m24svirt-controller-8696ccdf44-k9qpv   1/1     Running   0          4m52svirt-controller-8696ccdf44-tpxwp   1/1     Running   0          4m52svirt-handler-kl8tl                 1/1     Running   0          4m52svirt-operator-78fbcdfdf4-468h4     1/1     Running   0          8m4svirt-operator-78fbcdfdf4-nvvxx     1/1     Running   0          8m4s

所以服务启动后，执行上面这条命令

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

装置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 versionClient 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"}

创立VirtualMachine

VirtualMachine(vm)相似于docker镜像一个模板能够启动很多运行实例vmi：

[root@master kubevirt]# cat test.yamlapiVersion: kubevirt.io/v1alpha3kind: VirtualMachinemetadata:  labels:    kubevirt.io/vm: vm-cirros  name: vm-cirrosspec:  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.yamlvirtualmachine.kubevirt.io/vm-cirros created[root@master kubevirt]# kubectl get vmNAME        AGE   VOLUMEvm-cirros   21m

启动VirtualMachineInstance

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

[root@master kubevirt]# virtctl start vm-cirrosVM vm-cirros was scheduled to start[root@master kubevirt]# kubectl get vmiNAME        AGE   PHASE     IP            NODENAMEvm-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: cirrosPassword:$ ip a1: lo: <LOOPBACK,UP,LOWER_UP> 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 forever2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> 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]#

启动和进行命令

spec.running 字段如果设置为true为启动、false为进行**

创立 VirtualMachine 后，能够像这样关上或敞开它：

# Start the virtual machine:  启动虚拟机virtctl start vm   # Stop the virtual machine:  进行虚拟机virtctl stop vm

kubectl也能够应用：

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

vm作为服务公开

VirtualMachine 能够作为服务公开。理论服务将在 VirtualMachineInstance 启动后可用。

例如，在创立 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 NodePortService vmiservice-node successfully exposed for virtualmachine vm-cirros[root@master kubevirt]# kubectl get svcNAME              TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)        AGEkubernetes        ClusterIP   10.96.0.1       <none>        443/TCP        95dvmiservice-node   NodePort    10.106.62.191   <none>        24:31912/TCP   3s

最初应用近程工具连贯即可：

留神 端口应用svc NodePort端口**，如图所示：

简洁版