مدل سنتی (جدا):
┌─────────────────┐     ┌─────────────────┐
│  vSphere/Proxmox │     │   Kubernetes    │
│  VMها، template  │     │  Pod، Deployment│
│  vMotion         │     │  HPA، Ingress   │
└─────────────────┘     └─────────────────┘
        ↑                       ↑
   تیم virtualization      تیم platform

                    Kubernetes API Server
                            │
         ┌──────────────────┼──────────────────┐
         ▼                  ▼                  ▼
   VirtualMachine    VirtualMachineInstance   DataVolume
   (VM — start/stop)  (VMI — در حال اجرا)     (CDI — disk image)
         │                  │
         └────────┬─────────┘
                  ▼
           virt-controller          ← control plane (Deployment)
                  │
    ┌─────────────┼─────────────┐
    ▼             ▼             ▼
 Node 1        Node 2        Node N
virt-handler  virt-handler  virt-handler   ← DaemonSet (کنار kubelet)
    │             │             │
    ▼             ▼             ▼
virt-launcher   virt-launcher  virt-launcher  ← Pod
 Pod            Pod            Pod
 └── QEMU/KVM + libvirt
     └── Guest OS (Linux/Windows/...)

فاز ۱: VM فعلی lift-and-shift به KubeVirt
فاز ۲: سرویس جدید container کنار همان VM
فاز ۳: بخش‌بخش decompose — بدون big-bang

# باید virtualization supported و enabled باشد
grep -E '(vmx|svm)' /proc/cpuinfo

# دسترسی به device
ls -l /dev/kvm

kubectl -n kubevirt patch kubevirt kubevirt --type=merge \
  -p '{"spec":{"configuration":{"developerConfiguration":{"useEmulation":true}}}}'

export RELEASE=$(curl -s https://api.github.com/repos/kubevirt/kubevirt/releases/latest \
  | grep tag_name | cut -d '"' -f 4)

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 -n kubevirt wait kv kubevirt --for=condition=Available --timeout=300s

kubectl get pods -n kubevirt
# virt-api، virt-controller، virt-handler (DaemonSet)، virt-operator

# دانلود از release page
curl -L -o virtctl \
  "https://github.com/kubevirt/kubevirt/releases/download/${RELEASE}/virtctl-${RELEASE}-linux-amd64"
chmod +x virtctl && sudo mv virtctl /usr/local/bin/

# یا با krew:
kubectl krew install virt
# سپس: kubectl virt console my-vm

apiVersion: kubevirt.io/v1
kind: VirtualMachine
metadata:
  name: testvm
  namespace: default
spec:
  running: true
  template:
    metadata:
      labels:
        kubevirt.io/vm: testvm
    spec:
      domain:
        devices:
          disks:
            - name: containerdisk
              disk:
                bus: virtio
            - name: cloudinitdisk
              disk:
                bus: virtio
          interfaces:
            - name: default
              masquerade: {}
        resources:
          requests:
            memory: 1Gi
            cpu: 1
      networks:
        - name: default
          pod: {}
      volumes:
        - name: containerdisk
          containerDisk:
            image: quay.io/kubevirt/cirros-container-disk-demo
        - name: cloudinitdisk
          cloudInitNoCloud:
            userData: |
              #cloud-config
              password: cirros
              chpasswd: { expire: False }

kubectl apply -f testvm.yaml
kubectl get vm,vmi
virtctl console testvm   # login: cirros / gocubsgo

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: vm-disk
spec:
  accessModes: [ReadWriteOnce]
  resources:
    requests:
      storage: 20Gi
  storageClassName: your-sc
---
apiVersion: kubevirt.io/v1
kind: VirtualMachine
metadata:
  name: linux-vm
spec:
  running: false
  template:
    spec:
      domain:
        devices:
          disks:
            - name: disk0
              disk: { bus: virtio }
        resources:
          requests:
            memory: 4Gi
            cpu: 2
      volumes:
        - name: disk0
          persistentVolumeClaim:
            claimName: vm-disk

virtctl start linux-vm
virtctl console linux-vm
virtctl stop linux-vm      # graceful shutdown
virtctl stop linux-vm --grace-period 0 --force  # power pull

export CDI_VERSION=$(curl -s https://api.github.com/repos/kubevirt/containerized-data-importer/releases/latest \
  | grep tag_name | cut -d '"' -f 4)
kubectl apply -f \
  "https://github.com/kubevirt/containerized-data-importer/releases/download/${CDI_VERSION}/cdi-operator.yaml"
kubectl apply -f \
  "https://github.com/kubevirt/containerized-data-importer/releases/download/${CDI_VERSION}/cdi-cr.yaml"

apiVersion: cdi.kubevirt.io/v1beta1
kind: DataVolume
metadata:
  name: windows-2022-dv
spec:
  source:
    upload: {}
  pvc:
    accessModes: [ReadWriteOnce]
    resources:
      requests:
        storage: 50Gi

virtctl image-upload windows-2022-dv --size=50Gi --image-path=./windows2022.qcow2

interfaces:
  - name: net0
    bridge: {}
networks:
  - name: net0
    multus:
      networkName: tenant-vlan-100

virtctl migrate my-vm
# یا drain node — KubeVirt VM را migrate می‌کند اگر policy اجازه دهد

┌────────────────────────────────────────────────────┐
│              Kubernetes Cluster                     │
├──────────────┬──────────────┬──────────────────────┤
│  Containers  │   KubeVirt   │   Operators          │
│  Deploy/STS  │   VM/VMI     │   CDI, Kube-OVN      │
├──────────────┴──────────────┴──────────────────────┤
│  CNI (Calico/Kube-OVN)  │  CSI (Ceph/Longhorn)     │
├─────────────────────────┴──────────────────────────┤
│  KVM-enabled Linux Nodes                            │
└────────────────────────────────────────────────────┘

# وضعیت
kubectl get vm -A
kubectl get vmi -A

# console گرافیکی (VNC)
virtctl vnc my-vm

# pause / unpause (مثل suspend RAM)
virtctl pause vm my-vm
virtctl unpause vm my-vm

# restart
virtctl restart my-vm

# expose سرویس VM
kubectl expose vmi my-vm --port=80 --type=NodePort