chg: [diagnostic] Added support of multiple subscribers - WiP

diagnostic.py

@@ -172,7 +172,10 @@ def check_zmq(spinner):
     timeout = 15
     context = zmq.Context()
     socket = context.socket(zmq.SUB)
-    socket.connect(configuration_file.get('RedisGlobal', 'zmq_url'))
+    misp_instances = json.loads(cfg.get('RedisGlobal', 'misp_instances'))
+    instances_status = {}
+    for misp_instance in misp_instances:
+        socket.connect(misp_instance.get('zmq'))
         socket.setsockopt_string(zmq.SUBSCRIBE, '')
         poller = zmq.Poller()
 
@@ -184,10 +187,20 @@ def check_zmq(spinner):
                 if socket in socks and socks[socket] == zmq.POLLIN:
                     rcv_string = socket.recv()
                     if rcv_string.startswith(b'misp_json'):
-                    return (True, '')
+                        instances_status[misp_instance.get('name')] = True
             else:
                 pass
-            spinner.text = f'checking zmq - elapsed time: {int(time.time() - start_time)}s'
+                spinner.text = f'checking zmq of {misp_instance.get('name')} - elapsed time: {int(time.time() - start_time)}s'
+        instances_status[misp_instance.get('name')] = False
+
+    results = [s for n, s in instances_status.items()]
+    if all(results):
+        return (True, '')
+    elif any(results):
+        return_text = 'Some connection to ZMQ streams failed.\n'
+        for name, status:
+            return_text += f'\t➥ {name}: {'success' if status else 'failed'}\n'
+        return (True, return_text)
     else:
         return (False, '''Can\'t connect to the ZMQ stream.
 \t➥ Make sure the MISP ZMQ is running: `/servers/serverSettings/diagnostics`