[AIRFLOW-3353] Upgrade redis client

UPDATING.md

@@ -24,6 +24,14 @@ assists users migrating to a new version.
 
 ## Airflow Master
 
+### RedisPy dependency updated to v3 series
+
+If you are using the Redis Sensor or Hook you may have to update your code. See
+[redis-py porting instructions] to check if your code might be affected (MSET,
+MSETNX, ZADD, and ZINCRBY all were, but read the full doc).
+
+[redis-py porting instructions]: https://github.com/andymccurdy/redis-py/tree/3.2.0#upgrading-from-redis-py-2x-to-30
+
 ### New `dag_discovery_safe_mode` config option
 
 If `dag_discovery_safe_mode` is enabled, only check files for DAGs if

airflow/contrib/hooks/redis_hook.py

@@ -20,7 +20,7 @@
 """
 RedisHook module
 """
-from redis import StrictRedis
+from redis import Redis
 from airflow.hooks.base_hook import BaseHook
 
 
@@ -57,7 +57,7 @@ def get_conn(self):
                 'Initializing redis object for conn_id "%s" on %s:%s:%s',
                 self.redis_conn_id, self.host, self.port, self.db
             )
-            self.redis = StrictRedis(
+            self.redis = Redis(
                 host=self.host,
                 port=self.port,
                 password=self.password,

setup.py

@@ -213,7 +213,7 @@ def write_version(filename=os.path.join(*['airflow',
 postgres = ['psycopg2>=2.7.4']
 qds = ['qds-sdk>=1.10.4']
 rabbitmq = ['librabbitmq>=1.6.1']
-redis = ['redis>=2.10.5,<3.0.0']
+redis = ['redis~=3.2']
 salesforce = ['simple-salesforce>=0.72']
 samba = ['pysmbclient>=0.1.3']
 segment = ['analytics-python>=1.2.9']