Kubernetes : Create Virtual Machine2024/11/06 |
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Create a virtual machine with KubeVirt. This example is based on the environment like follows.
-----------+---------------------------+--------------------------+------------
| | |
eth0|10.0.0.30 eth0|10.0.0.51 eth0|10.0.0.52
+----------+-----------+ +-----------+----------+ +-----------+----------+
| [ dlp.srv.world ] | | [ node01.srv.world ] | | [ node02.srv.world ] |
| Control Plane | | Worker Node | | Worker Node |
+----------------------+ +----------------------+ +----------------------+
|
| [1] |
A Persistent storage is needed to store OS images. |
| [2] | Install Containerized Data Importer to store OS images. |
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[root@dlp ~]#
export TAG=$(curl -s -w %{redirect_url} https://github.com/kubevirt/containerized-data-importer/releases/latest) [root@dlp ~]# export VERSION=$(echo ${TAG##*/}) [root@dlp ~]# wget https://github.com/kubevirt/containerized-data-importer/releases/download/${VERSION}/cdi-operator.yaml [root@dlp ~]# wget https://github.com/kubevirt/containerized-data-importer/releases/download/${VERSION}/cdi-cr.yaml
[root@dlp ~]#
vi cdi-cr.yaml
apiVersion: cdi.kubevirt.io/v1beta1
kind: CDI
metadata:
name: cdi
spec:
config:
# add resource section to expand memory limits
podResourceRequirements:
limits:
cpu: '1'
memory: 4Gi
featureGates:
- HonorWaitForFirstConsumer
imagePullPolicy: IfNotPresent
infra:
nodeSelector:
kubernetes.io/os: linux
tolerations:
- key: CriticalAddonsOnly
operator: Exists
workload:
nodeSelector:
kubernetes.io/os: linux
[root@dlp ~]# kubectl apply -f cdi-operator.yaml namespace/cdi created customresourcedefinition.apiextensions.k8s.io/cdis.cdi.kubevirt.io created clusterrole.rbac.authorization.k8s.io/cdi-operator-cluster created clusterrolebinding.rbac.authorization.k8s.io/cdi-operator created serviceaccount/cdi-operator created role.rbac.authorization.k8s.io/cdi-operator created rolebinding.rbac.authorization.k8s.io/cdi-operator created deployment.apps/cdi-operator created
[root@dlp ~]#
kubectl apply -f cdi-cr.yaml cdi.cdi.kubevirt.io/cdi created # after a few minutes, the pods will start up as follows [root@dlp ~]# kubectl get pods -n cdi NAME READY STATUS RESTARTS AGE cdi-apiserver-55dd9447cb-px9mj 1/1 Running 0 2m29s cdi-deployment-55c6d9fc49-9rx4m 1/1 Running 0 2m29s cdi-operator-7f5bc68fc5-tgprq 1/1 Running 0 2m50s cdi-uploadproxy-5b76f7c876-fh8wx 1/1 Running 0 2m29s |
| [3] | Create a virtual machine. On this example, create it with Fedora 41. |
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[root@dlp ~]# kubectl get sc NAME PROVISIONER RECLAIMPOLICY VOLUMEBINDINGMODE ALLOWVOLUMEEXPANSION AGE nfs-client cluster.local/nfs-client-nfs-subdir-external-provisioner Delete Immediate true 30m
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: "fedora-pvc"
labels:
app: containerized-data-importer
annotations:
cdi.kubevirt.io/storage.import.endpoint: "https://download.fedoraproject.org/pub/fedora/linux/releases/41/Cloud/x86_64/images/Fedora-Cloud-Base-AmazonEC2-41-1.4.x86_64.raw.xz"
spec:
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 15Gi
storageClassName: nfs-client
[root@dlp ~]#
[root@dlp ~]# kubectl apply -f fedora-pvc.yml persistentvolumeclaim/fedora-pvc created kubectl get pvc NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS VOLUMEATTRIBUTESCLASS AGE fedora-pvc Bound pvc-f7bcb943-1b3f-42f8-a35b-605ded78ec44 15Gi RWO nfs-client <unset> 9m[root@dlp ~]# kubectl get pods NAME READY STATUS RESTARTS AGE importer-fedora-pvc 1/1 Running 0 14s # possible to see importing logs [root@dlp ~]# kubectl logs -f importer-fedora-pvc
.....
.....
I1106 06:04:15.804515 1 data-processor.go:341] Expanding image size to: 15220080640
E1106 06:04:15.809706 1 prlimit.go:156] failed to kill the process; os: process already finished
I1106 06:04:15.809722 1 data-processor.go:253] Validating image
E1106 06:04:15.813337 1 prlimit.go:156] failed to kill the process; os: process already finished
I1106 06:04:15.816310 1 data-processor.go:247] New phase: Complete
I1106 06:04:15.816915 1 importer.go:231] {"scratchSpaceRequired":false,"preallocationApplied":false,"message":"Import Complete"}
# after finishing importing, importer pod will also finish [root@dlp ~]# kubectl get pods No resources found in default namespace.
apiVersion: kubevirt.io/v1
kind: VirtualMachine
metadata:
name: fedora41
labels:
kubevirt.io/os: linux
spec:
running: true
template:
spec:
domain:
cpu:
cores: 2
devices:
disks:
- disk:
bus: virtio
name: disk0
- cdrom:
bus: sata
readonly: true
name: cloudinitdisk
machine:
type: q35
resources:
requests:
memory: 4096M
volumes:
- name: disk0
persistentVolumeClaim:
claimName: fedora-pvc
- cloudInitNoCloud:
userData: |
#cloud-config
hostname: fedora41
ssh_pwauth: true
disable_root: false
chpasswd:
list: |
root:myrootpassword
fedora:userpassword
expire: False
name: cloudinitdisk
[root@dlp ~]#
[root@dlp ~]# kubectl apply -f fedora-vm.yml virtualmachine.kubevirt.io/fedora41 created kubectl get vms NAME AGE STATUS READY fedora41 8s Running True[root@dlp ~]# kubectl get vmi NAME AGE PHASE IP NODENAME READY fedora41 2m49s Running 192.168.40.217 node01.srv.world True [root@dlp ~]# virtctl console fedora41 Successfully connected to fedora41 console. The escape sequence is ^] fedora41 login: root Password: [root@fedora41 ~]# # to go back to the Host's console, push Ctrl + ] key # * same operation as virsh command [root@dlp ~]# ssh fedora@192.168.40.217 The authenticity of host '192.168.40.217 (192.168.40.217)' can't be established. ED25519 key fingerprint is SHA256:eH+Jf4nj0c+OvjGYm+RBtBHc1K3pwYxdjUxvLXjTNAU. This key is not known by any other names. Are you sure you want to continue connecting (yes/no/[fingerprint])? yes Warning: Permanently added '192.168.40.217' (ED25519) to the list of known hosts. fedora@192.168.40.217's password: [fedora@fedora41 ~]$ |
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