kube-router manifest DSR adjustments (#3828)

roles/network_plugin/kube-router/templates/kube-router.yml.j2

@@ -113,6 +113,11 @@ spec:
         securityContext:
           privileged: true
         volumeMounts:
+{% if kube_router_enable_dsr %}
+        - name: docker-socket
+          mountPath: /var/run/docker.sock
+          readOnly: true
+{% endif %}
         - name: lib-modules
           mountPath: /lib/modules
           readOnly: true
@@ -147,12 +152,22 @@ spec:
         - name: kubeconfig
           mountPath: /var/lib/kube-router
       hostNetwork: true
+{% if kube_router_enable_dsr %}
+      hostIPC: true
+      hostPID: true
+{% endif %}
       tolerations:
       - operator: Exists
       # Mark pod as critical for rescheduling (Will have no effect starting with kubernetes 1.12)
       - key: CriticalAddonsOnly
         operator: "Exists"
       volumes:
+{% if kube_router_enable_dsr %}
+      - name: docker-socket
+        hostPath:
+          path: /var/run/docker.sock
+          type: Socket
+{% endif %}
       - name: lib-modules
         hostPath:
           path: /lib/modules