feat: add redis sentinel support

Signed-off-by: snowron <snowronark@gmail.com>

Author: snowron

sdk/python/feast/infra/online_stores/redis.py

@@ -43,6 +43,7 @@
 try:
     from redis import Redis
     from redis.cluster import ClusterNode, RedisCluster
+    from redis.sentinel import Sentinel
 except ImportError as e:
     from feast.errors import FeastExtrasDependencyImportError
 
@@ -54,6 +55,7 @@
 class RedisType(str, Enum):
     redis = "redis"
     redis_cluster = "redis_cluster"
+    redis_sentinel = "redis_sentinel"
 
 
 class RedisOnlineStoreConfig(FeastConfigBaseModel):
@@ -65,6 +67,9 @@ class RedisOnlineStoreConfig(FeastConfigBaseModel):
     redis_type: RedisType = RedisType.redis
     """Redis type: redis or redis_cluster"""
 
+    sentinel_master: StrictStr = "mymaster"
+    """Sentinel's master name"""
+
     connection_string: StrictStr = "localhost:6379"
     """Connection string containing the host, port, and configuration parameters for Redis
      format: host:port,parameter1,parameter2 eg. redis:6379,db=0 """
@@ -178,6 +183,19 @@ def _get_client(self, online_store_config: RedisOnlineStoreConfig):
                     ClusterNode(**node) for node in startup_nodes
                 ]
                 self._client = RedisCluster(**kwargs)
+            elif online_store_config.redis_type == RedisType.redis_sentinel:
+                sentinel_hosts = []
+
+                for item in startup_nodes:
+                    sentinel_hosts.append((item['host'], int(item['port'])))
+
+                sentinel = Sentinel( 
+                    sentinel_hosts,
+                    **kwargs
+                )
+                                    
+                master = sentinel.master_for(online_store_config.sentinel_master)
+                self._client = master
             else:
                 kwargs["host"] = startup_nodes[0]["host"]
                 kwargs["port"] = startup_nodes[0]["port"]