Support kafka connection timeout option

Add timeout option for kafka consumer client.

Task: 36034
Story: 2006312
Change-Id: I197b81b2c5690b3e27b3fac8dd42c4cb2d9ba776

monasca_common/confluent_kafka/consumer.py

@@ -25,7 +25,7 @@ class KafkaConsumer(object):
     def __init__(self, bootstrap_servers, group_id, topic,
                  fetch_min_bytes=1048576, client_id="",
                  repartition_callback=None, commit_callback=None,
-                 max_commit_interval=30):
+                 max_commit_interval=30, timeout=10000):
         """
         Create new high-level Consumer instance.
 
@@ -43,10 +43,12 @@ class KafkaConsumer(object):
         :param callable commit_callback: Callback function responsible for
         calling the commit() method.
         :param int max_commit_interval: Maximum time in seconds between commits.
+        :param int timeout: Client group session and failure detection timeout.
         """
 
         consumer_config = {'bootstrap.servers': bootstrap_servers,
                            'group.id': group_id,
+                           'session.timeout.ms': timeout,
                            'fetch.min.bytes': fetch_min_bytes,
                            'client.id': client_id,
                            'enable.auto.commit': False,

monasca_common/kafka/consumer.py

@@ -18,13 +18,14 @@ import logging
 import threading
 import time
 
-import monasca_common.kafka_lib.client as kafka_client
-import monasca_common.kafka_lib.common as kafka_common
-import monasca_common.kafka_lib.consumer as kafka_consumer
-
 from kazoo.client import KazooClient
 from kazoo.recipe.partitioner import SetPartitioner
 
+import monasca_common.kafka_lib.client as kafka_client
+import monasca_common.kafka_lib.common as kafka_common
+from monasca_common.kafka_lib.conn import DEFAULT_SOCKET_TIMEOUT_SECONDS
+import monasca_common.kafka_lib.consumer as kafka_consumer
+
 log = logging.getLogger(__name__)
 
 """Kafka consumer interface
@@ -52,7 +53,8 @@ class KafkaConsumer(object):
                  fetch_size=1048576,
                  repartition_callback=None,
                  commit_callback=None,
-                 commit_timeout=30):
+                 commit_timeout=30,
+                 timeout=DEFAULT_SOCKET_TIMEOUT_SECONDS):
         """Init
 
              kafka_url            - Kafka location
@@ -68,6 +70,7 @@ class KafkaConsumer(object):
              commit_callback      - Callback to run when the commit_timeout
                                     has elapsed between commits.
              commit_timeout       - Timeout between commits.
+             timeout              - kafka connection timeout
         """
 
         self._kazoo_client = None
@@ -89,7 +92,7 @@ class KafkaConsumer(object):
         self._zookeeper_url = zookeeper_url
         self._zookeeper_path = zookeeper_path
 
-        self._kafka = kafka_client.KafkaClient(kafka_url)
+        self._kafka = kafka_client.KafkaClient(kafka_url, timeout=timeout)
 
         self._consumer = self._create_kafka_consumer()
 

monasca_common/tests/test_confluent_kafka.py

@@ -123,6 +123,7 @@ class TestConfluentKafkaConsumer(base.BaseTestCase):
 
     def test_kafka_consumer_init(self):
         expected_config = {'group.id': 'fake_group',
+                           'session.timeout.ms': 10000,
                            'bootstrap.servers': ['fake_server1',
                                                  'fake_server2'],
                            'fetch.min.bytes': 128,