Trigger a manual Redis Cluster failover with CLUSTER FAILOVER for planned primary maintenance
domain: redis.io · 5 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
Connect to the replica of the primary you want to fail over — CLUSTER FAILOVER must be issued on a replica, not the primary
Run CLUSTER FAILOVER with no options for the safe, coordinated path: the primary pauses clients, the replica waits to match the replication offset, then takes over
Use CLUSTER FAILOVER FORCE if the primary is unreachable and coordination isn't possible, or TAKEOVER only as a last resort when cluster authorization can't be reached
Confirm the new primary via CLUSTER NODES / CLUSTER SLOTS on all nodes and check that hash slot ownership propagated correctly
Confirm the client library re-discovers the new primary automatically, or update any client-side topology cache
Known gotchas
Plain CLUSTER FAILOVER (and FORCE) still requires a majority of primaries reachable to authorize a new configuration epoch
TAKEOVER bypasses cluster authorization entirely and can create a split-brain if used while the old primary is still partially reachable
An OK reply only means the failover was scheduled, not that it completed — verify the outcome separately with CLUSTER NODES
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