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Make cluster client get updated nodes' addrs 

During loading state, if all the nodes can't be connected, it's
possible that all the nodes' IP addresses have changed at the same
time. Clear the clusterAddrs so that the cluster client has chance
to get updated nodes' IP addresses by using the initial setting of
cluster addresses.
This commit is contained in:
David Fu 2020-06-15 15:24:18 +08:00
parent 5b4d00c217
commit bb6761fe83
1 changed files with 10 additions and 0 deletions
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10
cluster.go
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@ -1013,6 +1013,16 @@ func (c *ClusterClient) loadState(ctx context.Context) (*clusterState, error) {
return newClusterState(c.nodes, slots, node.Client.opt.Addr)
}
/*
* No node is connectable. It's possible that all nodes' IP has changed.
* Clear clusterAddrs to let client be able to re-connect using the initial
* setting of the addresses (e.g. [redsi-cluster-0:6379, redis-cluster-1:6379]),
* which might have chance to resolve domain name and get updated IP address.
*/
c.nodes.mu.Lock()
c.nodes.clusterAddrs = nil
c.nodes.mu.Unlock()
return nil, firstErr
}