Fix for bug 1433 - MON will not start till MongoDB service is up

[osm/MON.git] / osm_mon / cmd / common_functions.py

diff --git a/osm_mon/cmd/common_functions.py b/osm_mon/cmd/common_functions.py
new file mode 100644 (file)
index 0000000..5e4bff8
--- /dev/null
+++ b/osm_mon/cmd/common_functions.py
@@ -0,0 +1,55 @@
+# -*- coding: utf-8 -*-
+
+# This file is part of OSM Monitoring module
+
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License. You may obtain
+# a copy of the License at
+
+#         http://www.apache.org/licenses/LICENSE-2.0
+
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+
+import pymongo
+import time
+import socket
+import logging
+
+
+def wait_till_core_services_are_ready(config, process_name="osm-mon", commondb_wait_time=5, kafka_wait_time=5):
+
+    logging.debug("wait_till_services_are_ready()")
+
+    if not config:
+        logging.info("Config information is not available")
+        return False
+
+    # Check if common-db is ready
+    while(True):
+        commondb_url = config.conf["database"].get("uri")
+        try:
+            commondb = pymongo.MongoClient(commondb_url)
+            commondb.server_info()
+            break
+        except Exception:
+            logging.info("{} process is waiting for commondb to come up...".format(process_name))
+            time.sleep(commondb_wait_time)
+
+    # Check if kafka is ready
+    while(True):
+        port_in_use = False
+        # Logic to check kafka is ready
+        with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
+            if s.connect_ex(("kafka", int(config.conf["message"].get("port")))) == 0:
+                port_in_use = True
+        if port_in_use:
+            break
+        else:
+            logging.info("{} process is waiting for kafka to come up...".format(process_name))
+            time.sleep(kafka_wait_time)
+
+    return True