docs: Add TUN device

kubernetes.yml

@@ -1,3 +1,4 @@
+---
 apiVersion: v1
 kind: PersistentVolumeClaim
 metadata:
@@ -16,47 +17,53 @@ metadata:
   labels:
     name: qemu
 spec:
-  terminationGracePeriodSeconds: 120 # the Kubernetes default is 30 seconds and it may be not enough
   containers:
   - name: qemu
     image: qemux/qemu-arm
-      ports:
-        - containerPort: 8006
-          protocol: TCP
-      securityContext:
-        privileged: true
     env:
     - name: BOOT
       value: "https://dl-cdn.alpinelinux.org/alpine/v3.19/releases/aarch64/alpine-virt-3.19.1-aarch64.iso"
     - name: RAM_SIZE
-          value: 1G
+      value: "1G"
     - name: CPU_CORES
       value: "1"
     - name: DISK_SIZE
       value: "16G"
+    ports:
+    - containerPort: 8006
+    securityContext:
+      capabilities:
+        add:
+        - NET_ADMIN
+      privileged: true
     volumeMounts:
     - mountPath: /storage
       name: storage
     - mountPath: /dev/kvm
       name: dev-kvm
+    - mountPath: /dev/net/tun
+      name: dev-tun
+  terminationGracePeriodSeconds: 120
   volumes:
   - name: storage
     persistentVolumeClaim:
       claimName: qemu-pvc
-    - name: dev-kvm
+  - hostPath:
-      hostPath:
       path: /dev/kvm
+    name: dev-kvm
+  - hostPath:
+      path: /dev/net/tun
+      type: CharDevice
+    name: dev-tun
 ---
 apiVersion: v1
 kind: Service
 metadata:
   name: qemu
 spec:
-  type: NodePort
-  selector:
-    name: qemu
   ports:
   - name: tcp-8006
-      protocol: TCP
     port: 8006
-      targetPort: 8006
+  selector:
+    name: qemu
+  type: NodePort