[没接触过kubevirt?]15分钟快速入门kubevirt
【摘要】 @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...
@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
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: <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 forever
2: 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 <none> 443/TCP 95d
vmiservice-node NodePort 10.106.62.191 <none> 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:
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
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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