docs: Add TUN device (#861)

compose.yml

@@ -6,6 +6,7 @@ services:
             DISK_SIZE: "16G"
         devices:
             - /dev/kvm
+            - /dev/net/tun
         cap_add:
             - NET_ADMIN
         ports:

kubernetes.yml

@@ -1,3 +1,4 @@
+---
 apiVersion: v1
 kind: PersistentVolumeClaim
 metadata:
@@ -16,44 +17,51 @@ metadata:
   labels:
     name: dsm
 spec:
-  terminationGracePeriodSeconds: 120 # the Kubernetes default is 30 seconds and it may be not enough
   containers:
   - name: dsm
     image: vdsm/virtual-dsm
-      ports:
-        - containerPort: 5000
-          protocol: TCP
-      securityContext:
-        privileged: true
     env:
     - name: RAM_SIZE
-          value: 1G
+      value: "1G"
     - name: CPU_CORES
       value: "1"
     - name: DISK_SIZE
-          value: "16G"  # Kubernetes uses Gi, but DSM uses GB
+      value: "16G"
+    ports:
+    - containerPort: 5000
+    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: dsm-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: dsm
 spec:
-  type: NodePort
-  selector:
-    name: dsm
   ports:
   - name: tcp-5000
     port: 5000
-      targetPort: 5000
+  selector:
+    name: dsm
+  type: NodePort

readme.md

@@ -33,6 +33,7 @@ services:
       DISK_SIZE: "16G"
     devices:
       - /dev/kvm
+      - /dev/net/tun
     cap_add:
       - NET_ADMIN
     ports:
@@ -45,7 +46,7 @@ services:
 Via Docker CLI:
 
 ```bash
-docker run -it --rm -p 5000:5000 --device=/dev/kvm --cap-add NET_ADMIN --stop-timeout 120 vdsm/virtual-dsm
+docker run -it --rm -p 5000:5000 --device=/dev/kvm --device=/dev/net/tun --cap-add NET_ADMIN --stop-timeout 120 vdsm/virtual-dsm
 ```
 
 Via Kubernetes: