Kubernetes : 仮想マシン作成2025/01/27 |
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KubeVirt で仮想マシンを作成します。 当例では以下のように 4 台のノードを使用して Kubernetes クラスターを構成しています。
+----------------------+ +----------------------+
| [ ctrl.srv.world ] | | [ dlp.srv.world ] |
| Manager Node | | Control Plane |
+-----------+----------+ +-----------+----------+
eth0|10.0.0.25 eth0|10.0.0.30
| |
------------+--------------------------+-----------
| |
eth0|10.0.0.51 eth0|10.0.0.52
+-----------+----------+ +-----------+----------+
| [ node01.srv.world ] | | [ node02.srv.world ] |
| Worker Node#1 | | Worker Node#2 |
+----------------------+ +----------------------+
|
| [1] |
OS イメージを保管するための外部ストレージが必要となります。 |
| [2] | OS イメージを保管するために Containerized Data Importer をインストールします。 |
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[cent@ctrl ~]$
export TAG=$(curl -s -w %{redirect_url} https://github.com/kubevirt/containerized-data-importer/releases/latest) [cent@ctrl ~]$ export VERSION=$(echo ${TAG##*/}) [cent@ctrl ~]$ wget https://github.com/kubevirt/containerized-data-importer/releases/download/${VERSION}/cdi-operator.yaml [cent@ctrl ~]$ wget https://github.com/kubevirt/containerized-data-importer/releases/download/${VERSION}/cdi-cr.yaml
[cent@ctrl ~]$
vi cdi-cr.yaml
apiVersion: cdi.kubevirt.io/v1beta1
kind: CDI
metadata:
name: cdi
spec:
config:
# 下行を追記してメモリーリミットを適当に増やす
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
[cent@ctrl ~]$ 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
[cent@ctrl ~]$
kubectl apply -f cdi-cr.yaml cdi.cdi.kubevirt.io/cdi created # 一定時間経過すると 関連 pod が起動 [cent@ctrl ~]$ kubectl get pods -n cdi NAME READY STATUS RESTARTS AGE cdi-apiserver-74dcb7f4c5-mvtwv 1/1 Running 0 63s cdi-deployment-546cdb5fcd-r27xg 1/1 Running 0 62s cdi-operator-59c7548cfb-bm2dr 1/1 Running 0 89s cdi-uploadproxy-66448dc879-22n88 1/1 Running 0 63s |
| [3] | 仮想マシンを作成します。当例では Fedora で作成します。 |
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[cent@ctrl ~]$ kubectl get sc NAME PROVISIONER RECLAIMPOLICY VOLUMEBINDINGMODE ALLOWVOLUMEEXPANSION AGE nfs-client cluster.local/nfs-client-nfs-subdir-external-provisioner Delete Immediate true 97m
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: 10Gi
storageClassName: nfs-client
[cent@ctrl ~]$
[cent@ctrl ~]$ 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-da7807ef-cfd7-4d4f-ae88-573d2139dd8f 10Gi RWO nfs-client <unset> 5s[cent@ctrl ~]$ kubectl get pods NAME READY STATUS RESTARTS AGE importer-fedora-pvc 1/1 Running 0 13s # possible to see importing logs [cent@ctrl ~]$ kubectl logs -f importer-fedora-pvc
.....
.....
I0127 04:03:56.748963 1 data-processor.go:341] Expanding image size to: 10146021376
E0127 04:03:56.761941 1 prlimit.go:156] failed to kill the process; os: process already finished
I0127 04:03:56.761953 1 data-processor.go:253] Validating image
E0127 04:03:56.766226 1 prlimit.go:156] failed to kill the process; os: process already finished
I0127 04:03:56.769261 1 data-processor.go:247] New phase: Complete
I0127 04:03:56.769498 1 importer.go:231] {"scratchSpaceRequired":false,"preallocationApplied":false,"message":"Import Complete"}
# データのインポートが終了するとimporter pod も終了 [cent@ctrl ~]$ kubectl get pods No resources found in default namespace.
apiVersion: kubevirt.io/v1
kind: VirtualMachine
metadata:
name: fedora41
labels:
kubevirt.io/os: linux
spec:
runStrategy: Halted
template:
spec:
domain:
cpu:
cores: 2
devices:
disks:
- disk:
bus: virtio
name: disk0
- cdrom:
bus: sata
readonly: true
name: cloudinitdisk
interfaces:
- name: default
masquerade: {}
machine:
type: q35
resources:
requests:
memory: 4096M
networks:
- name: default
pod: {}
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
[cent@ctrl ~]$
[cent@ctrl ~]$ kubectl apply -f fedora-vm.yml virtualmachine.kubevirt.io/fedora41 created kubectl get vms
NAME AGE STATUS READY
fedora41 33s Stopped False
[cent@ctrl ~]$ virtctl start fedora41
VM fedora41 was scheduled to start
[cent@ctrl ~]$ kubectl get vmi NAME AGE PHASE IP NODENAME READY fedora41 24s Running 192.168.40.207 node01.srv.world True [cent@ctrl ~]$ virtctl console fedora41 Successfully connected to fedora41 console. The escape sequence is ^] fedora41 login: root Password: [root@fedora41 ~]# # ホストのコンソールに戻るには Ctrl + ] キー # * virsh コマンドと同じ操作 # ssh で接続 [cent@ctrl ~]$ kubectl get pods NAME READY STATUS RESTARTS AGE virt-launcher-fedora41-8bgpp 2/2 Running 0 106s [cent@ctrl ~]$ kubectl port-forward pod/virt-launcher-fedora41-8bgpp 2220:22 & [cent@ctrl ~]$ ssh fedora@127.0.0.1 -p 2220 Handling connection for 2220 The authenticity of host '[127.0.0.1]:2220 ([127.0.0.1]:2220)' can't be established. ED25519 key fingerprint is SHA256:GLKGVtlYXlSk3YPsQF3wRaENGBmg4+mcC0g4A1oC8A4. This key is not known by any other names. Are you sure you want to continue connecting (yes/no/[fingerprint])? yes Warning: Permanently added '[127.0.0.1]:2220' (ED25519) to the list of known hosts. fedora@127.0.0.1's password: [fedora@fedora41 ~]$ |
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