Merge pull request #2277 from GNS3/fix/2276

Prevent X11 socket file to be modified by Docker container

gns3server/compute/docker/docker_vm.py

@@ -406,7 +406,7 @@ class DockerVM(BaseNode):
             await self._start_vnc()
             params["Env"].append("QT_GRAPHICSSYSTEM=native")  # To fix a Qt issue: https://github.com/GNS3/gns3-server/issues/556
             params["Env"].append("DISPLAY=:{}".format(self._display))
-            params["HostConfig"]["Binds"].append("/tmp/.X11-unix/:/tmp/.X11-unix/")
+            params["HostConfig"]["Binds"].append("/tmp/.X11-unix/X{0}:/tmp/.X11-unix/X{0}:ro".format(self._display))
 
         if self._extra_hosts:
             extra_hosts = self._format_extra_hosts(self._extra_hosts)

tests/compute/docker/test_docker_vm.py

@@ -182,7 +182,7 @@ async def test_create_vnc(compute_project, manager):
                         "Binds": [
                             "{}:/gns3:ro".format(get_resource("compute/docker/resources")),
                             "{}:/gns3volumes/etc/network".format(os.path.join(vm.working_dir, "etc", "network")),
-                            '/tmp/.X11-unix/:/tmp/.X11-unix/'
+                            "/tmp/.X11-unix/X{0}:/tmp/.X11-unix/X{0}:ro".format(vm._display)
                         ],
                         "Privileged": True
                     },