Report GNS3 VM errors to the GUI server summary. Ref #1359.

gns3server/controller/compute.py

@@ -138,6 +138,14 @@ class Compute:
                 self._password = None
                 self._auth = aiohttp.BasicAuth(self._user, "")
 
+    def set_last_error(self, msg):
+        """
+        Set the last error message for this compute.
+
+        :param msg: message
+        """
+        self._last_error = msg
+
     @asyncio.coroutine
     def interfaces(self):
         """

gns3server/controller/gns3vm/__init__.py

@@ -246,13 +246,15 @@ class GNS3VM:
             except GNS3VMError as e:
                 # User will receive the error later when they will try to use the node
                 try:
-                    yield from self._controller.add_compute(compute_id="vm",
-                                                            name="GNS3 VM ({})".format(self.current_engine().vmname),
-                                                            host=None,
-                                                            force=True)
+                    compute = yield from self._controller.add_compute(compute_id="vm",
+                                                                      name="GNS3 VM ({})".format(self.current_engine().vmname),
+                                                                      host=None,
+                                                                      force=True)
+                    compute.set_last_error(str(e))
+
                 except aiohttp.web.HTTPConflict:
                     pass
-                log.error("Can't start the GNS3 VM: %s", str(e))
+                log.error("Cannot start the GNS3 VM: {}".format(e))
 
     @asyncio.coroutine
     def exit_vm(self):
@@ -290,8 +292,9 @@ class GNS3VM:
                 yield from engine.start()
             except Exception as e:
                 yield from self._controller.delete_compute("vm")
-                log.error("Can't start the GNS3 VM: {}".format(str(e)))
+                log.error("Cannot start the GNS3 VM: {}".format(str(e)))
                 yield from compute.update(name="GNS3 VM ({})".format(engine.vmname))
+                compute.set_last_error(str(e))
                 raise e
             yield from compute.connect()  # we can connect now that the VM has started
             yield from compute.update(name="GNS3 VM ({})".format(engine.vmname),

gns3server/web/web_server.py

@@ -137,7 +137,10 @@ class WebServer:
 
         def signal_handler(signame, *args):
             log.warning("Server has got signal {}, exiting...".format(signame))
-            asyncio_ensure_future(self.shutdown_server())
+            try:
+                asyncio_ensure_future(self.shutdown_server())
+            except asyncio.CancelledError:
+                pass
 
         signals = ["SIGTERM", "SIGINT"]
         if sys.platform.startswith("win"):
@@ -295,4 +298,7 @@ class WebServer:
             log.warning("TypeError exception in the loop {}".format(e))
         finally:
             if self._loop.is_running():
-                self._loop.run_until_complete(self.shutdown_server())
+                try:
+                    self._loop.run_until_complete(self.shutdown_server())
+                except asyncio.CancelledError:
+                    pass