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Explain how to remove failed cluster node (#2427) #2434

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Dec 15, 2023
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Explain how to remove failed cluster node (#2427) #2434

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Add explain how to remove failed node (#2427)
jiangyunpeng Jun 8, 2023
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zuiderkwast Dec 15, 2023
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8 changes: 8 additions & 0 deletions docs/management/scaling.md
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Expand Up @@ -875,6 +875,14 @@ over one of its replicas and remove the node after it turned into a replica of t
new master. Obviously this does not help when you want to reduce the actual
number of masters in your cluster, in that case, a resharding is needed.

There is a special scenario where you want to remove a failed node.
You should not use the `del-node` command because it tries to connect to all nodes and you will encounter a "connection refused" error.
Instead, you can use the `call` command:

redis-cli --cluster call 127.0.0.1:7000 cluster forget `<node-id>`

This command will execute `CLUSTER FORGET` command on every node.

#### Replica migration

In Redis Cluster, you can reconfigure a replica to replicate with a
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