redis cluster-reset命令

CLUSTER RESET [HARD|SOFT]

Reset a Redis Cluster node, in a more or less drastic way depending on the
reset type, that can be hard or soft. Note that this command
does not work for masters if they hold one or more keys, in that case
to completely reset a master node keys must be removed first, e.g. by using FLUSHALL first,
and then CLUSTER RESET.

Effects on the node:

  1. All the other nodes in the cluster are forgotten.
  2. All the assigned / open slots are reset, so the slots-to-nodes mapping is totally cleared.
  3. If the node is a slave it is turned into an (empty) master. Its dataset is flushed, so at the end the node will be an empty master.
  4. Hard reset only: a new Node ID is generated.
  5. Hard reset only: currentEpoch and configEpoch vars are set to 0.
  6. The new configuration is persisted on disk in the node cluster configuration file.

This command is mainly useful to re-provision a Redis Cluster node
in order to be used in the context of a new, different cluster. The command
is also extensively used by the Redis Cluster testing framework in order to
reset the state of the cluster every time a new test unit is executed.

If no reset type is specified, the default is soft.

*返回值

Simple string reply: OK if the command was successful. Otherwise an error is returned.