def swapdb(self, *args, **kwargs) -> NoReturn:
"""
Swaps two Redis databases.
For more information see https://redis.io/commands/swapdb
"""
raise RedisClusterException("SWAPDB is not supported in cluster mode")
def wait_for_cluster_creation(redis_url, cluster_nodes, timeout=60):
"""
Waits for the cluster creation to complete.
As soon as all :cluster_nodes: nodes become available, the cluster will be
considered ready.
:param redis_url: the cluster's url, e.g. redis://localhost:16379/0
:param cluster_nodes: The number of nodes in the cluster
:param timeout: the amount of time to wait (in seconds)
"""
now = time.time()
end_time = now + timeout
client = None
print(f"Waiting for {cluster_nodes} cluster nodes to become available")
while now < end_time:
try:
client = redis.RedisCluster.from_url(redis_url)
if len(client.get_nodes()) == int(cluster_nodes):
print("All nodes are available!")
break
except RedisClusterException:
pass
time.sleep(1)
now = time.time()
if now >= end_time:
available_nodes = 0 if client is None else len(client.get_nodes())
raise RedisClusterException(
f"The cluster did not become available after {timeout} seconds. "
f"Only {available_nodes} nodes out of {cluster_nodes} are available"
)
def replicaof(self, *args, **kwargs) -> NoReturn:
"""
Make the server a replica of another instance, or promote it as master.
For more information see https://redis.io/commands/replicaof
"""
raise RedisClusterException("REPLICAOF is not supported in cluster mode")
def my_bad_function() -> int:
nonlocal fails_left
fails_left -= 1
if fails_left > 0:
raise RedisClusterException(
"All slots are not covered after query all startup_nodes.")
return 1
def swapdb(self, *args, **kwargs):
raise RedisClusterException("SWAPDB is not supported in cluster" " mode")
def replicaof(self, *args, **kwargs):
raise RedisClusterException("REPLICAOF is not supported in cluster" " mode")
def slaveof(self, *args, **kwargs):
raise RedisClusterException("SLAVEOF is not supported in cluster mode")