Notification to clients

gns3server/modules/base.py

@@ -183,14 +183,15 @@ class IModule(multiprocessing.Process):
                                                                                               self._current_call_id))
         self._stream.send_json(response)
 
-    def send_notification(self, results):
+    def send_notification(self, destination, results):
         """
         Sends a notification
 
-        :param results: JSON results to the ZeroMQ server
+        :param destination: destination (or method)
+        :param results: JSON results to the ZeroMQ router
         """
 
-        jsonrpc_response = jsonrpc.JSONRPCNotification(results)()
+        jsonrpc_response = jsonrpc.JSONRPCNotification(destination, results)()
 
         # add session to the response
         response = [self._current_session, jsonrpc_response]

gns3server/modules/dynamips/__init__.py

@@ -115,8 +115,8 @@ class Dynamips(IModule):
         self._working_dir = self._projects_dir
         self._dynamips = ""
 
-        #self._callback = self.add_periodic_callback(self.test, 1000)
+        self._callback = self.add_periodic_callback(self._check_hypervisors, 5000)
-        #self._callback.start()
+        self._callback.start()
 
     def stop(self):
         """
@@ -127,6 +127,27 @@ class Dynamips(IModule):
             self._hypervisor_manager.stop_all_hypervisors()
         IModule.stop(self)  # this will stop the I/O loop
 
+    def _check_hypervisors(self):
+        """
+        Periodic callback to check if Dynamips hypervisors are running.
+
+        Sends a notification to the client if not.
+        """
+
+        if self._hypervisor_manager:
+            for hypervisor in self._hypervisor_manager.hypervisors:
+                if hypervisor.started and not hypervisor.is_running():
+                    notification = {"module": self.name}
+                    stdout = hypervisor.read_stdout()
+                    device_names = []
+                    for device in hypervisor.devices:
+                        device_names.append(device.name)
+                    notification["message"] = "Dynamips has stopped running"
+                    notification["details"] = stdout
+                    notification["devices"] = device_names
+                    self.send_notification("{}.dynamips_stopped".format(self.name), notification)
+                    hypervisor.stop()
+
     @IModule.route("dynamips.reset")
     def reset(self, request):
         """

gns3server/modules/dynamips/hypervisor.py

@@ -54,6 +54,7 @@ class Hypervisor(DynamipsHypervisor):
         self._command = []
         self._process = None
         self._stdout_file = ""
+        self._started = False
 
         # settings used the load-balance hypervisors
         # (for the hypervisor manager)
@@ -70,6 +71,16 @@ class Hypervisor(DynamipsHypervisor):
 
         return(self._id)
 
+    @property
+    def started(self):
+        """
+        Returns either this hypervisor has been started or not.
+
+        :returns: boolean
+        """
+
+        return self._started
+
     @property
     def path(self):
         """
@@ -199,6 +210,7 @@ class Hypervisor(DynamipsHypervisor):
                                                  stderr=subprocess.STDOUT,
                                                  cwd=self._working_dir)
             log.info("Dynamips started PID={}".format(self._process.pid))
+            self._started = True
         except EnvironmentError as e:
             log.error("could not start Dynamips: {}".format(e))
             raise DynamipsError("could not start Dynamips: {}".format(e))
@@ -222,6 +234,8 @@ class Hypervisor(DynamipsHypervisor):
                 if self._process.poll() == None:
                     log.warn("Dynamips process {} is still running".format(self._process.pid))
 
+        self._started = False
+
     def read_stdout(self):
         """
         Reads the standard output of the Dynamips process.

gns3server/modules/iou/__init__.py

@@ -82,7 +82,8 @@ class IOU(IModule):
         self._working_dir = self._projects_dir
         self._iourc = ""
 
-        self._iou_callback = self.add_periodic_callback(self._check_iou, 5000)
+        # check every 5 seconds
+        self._iou_callback = self.add_periodic_callback(self._check_iou_is_alive, 5000)
         self._iou_callback.start()
 
     def stop(self):
@@ -97,15 +98,30 @@ class IOU(IModule):
 
         IModule.stop(self)  # this will stop the I/O loop
 
-    def _check_iou(self):
+    def _check_iou_is_alive(self):
+        """
+        Periodic callback to check if IOU and iouyap are alive
+        for each IOU instance.
+
+        Sends a notification to the client if not.
+        """
 
         for iou_id in self._iou_instances:
             iou_instance = self._iou_instances[iou_id]
-            if iou_instance.started and not iou_instance.is_running():
+            if iou_instance.started and (not iou_instance.is_running() or not iou_instance.is_iouyap_running()):
-                self.send_notification({"module": self.name,
+                notification = {"module": self.name,
                                 "id": iou_id,
-                                        "name": iou_instance.name,
+                                "name": iou_instance.name}
-                                        "message": "IOU is not running"})
+                if not iou_instance.is_running():
+                    stdout = iou_instance.read_iou_stdout()
+                    notification["message"] = "IOU has stopped running"
+                    notification["details"] = stdout
+                    self.send_notification("{}.iou_stopped".format(self.name), notification)
+                elif not iou_instance.is_iouyap_running():
+                    stdout = iou_instance.read_iouyap_stdout()
+                    notification["message"] = "iouyap has stopped running"
+                    notification["details"] = stdout
+                    self.send_notification("{}.iouyap_stopped".format(self.name), notification)
                 iou_instance.stop()
 
     @IModule.route("iou.reset")

gns3server/modules/iou/iou_device.py

@@ -77,7 +77,8 @@ class IOUDevice(object):
         self._command = []
         self._process = None
         self._iouyap_process = None
-        self._stdout_file = ""
+        self._iou_stdout_file = ""
+        self._iouyap_stdout_file = ""
         self._ioucon_thead = None
         self._ioucon_thread_stop_event = None
         self._host = host
@@ -391,9 +392,9 @@ class IOUDevice(object):
             self._update_iouyap_config()
             command = [self._iouyap, str(self._id + 512)]  # iouyap has always IOU ID + 512
             log.info("starting iouyap: {}".format(command))
-            self._stdout_file = os.path.join(self._working_dir, "iouyap.log")
+            self._iouyap_stdout_file = os.path.join(self._working_dir, "iouyap.log")
-            log.info("logging to {}".format(self._stdout_file))
+            log.info("logging to {}".format(self._iouyap_stdout_file))
-            with open(self._stdout_file, "w") as fd:
+            with open(self._iouyap_stdout_file, "w") as fd:
                 self._iouyap_process = subprocess.Popen(command,
                                                         stdout=fd,
                                                         stderr=subprocess.STDOUT,
@@ -423,9 +424,9 @@ class IOUDevice(object):
             self._command = self._build_command()
             try:
                 log.info("starting IOU: {}".format(self._command))
-                self._stdout_file = os.path.join(self._working_dir, "iou.log")
+                self._iou_stdout_file = os.path.join(self._working_dir, "iou.log")
-                log.info("logging to {}".format(self._stdout_file))
+                log.info("logging to {}".format(self._iou_stdout_file))
-                with open(self._stdout_file, "w") as fd:
+                with open(self._iou_stdout_file, "w") as fd:
                     self._process = subprocess.Popen(self._command,
                                                      stdout=fd,
                                                      stderr=subprocess.STDOUT,
@@ -481,19 +482,34 @@ class IOUDevice(object):
                                                                                          self._id))
         self._iouyap_process = None
 
-    def read_stdout(self):
+    def read_iou_stdout(self):
         """
         Reads the standard output of the IOU process.
         Only use when the process has been stopped or has crashed.
         """
 
         output = ""
-        if self._stdout_file:
+        if self._iou_stdout_file:
             try:
-                with open(self._stdout_file) as file:
+                with open(self._iou_stdout_file) as file:
                     output = file.read()
             except EnvironmentError as e:
-                log.warn("could not read {}: {}".format(self._stdout_file, e))
+                log.warn("could not read {}: {}".format(self._iou_stdout_file, e))
+        return output
+
+    def read_iouyap_stdout(self):
+        """
+        Reads the standard output of the iouyap process.
+        Only use when the process has been stopped or has crashed.
+        """
+
+        output = ""
+        if self._iouyap_stdout_file:
+            try:
+                with open(self._iouyap_stdout_file) as file:
+                    output = file.read()
+            except EnvironmentError as e:
+                log.warn("could not read {}: {}".format(self._iouyap_stdout_file, e))
         return output
 
     def is_running(self):