docker 启动 redis cluster,使用出现CLUSTERDOWN Hash slot not served(redis cluster重新分配slot)
背景就像上一篇所说,我使用了docker-componse启动了redis cluster集群。经过了一天的测试,本来测试已经完毕了,但是今天修改了点代码,再次测试的时候发现redis cluster起不来了。报错CLUSTERDOWN Hash slot not served。从这个错误提示,可以看出是slot分配原因造成的。上网找,真的蛋疼,你复制我,我复制你,最后还是得自己解决。查看详细ba
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背景
就像上一篇所说,我使用了docker-componse启动了redis cluster集群。经过了一天的测试,本来测试已经完毕了,但是今天修改了点代码,再次测试的时候发现redis cluster起不来了。报错CLUSTERDOWN Hash slot not served
。从这个错误提示,可以看出是slot分配原因造成的。上网找,真的蛋疼,你复制我,我复制你,最后还是得自己解决。
查看详细
banfushen@banfushen:~/redis-cluster$ redis-cli -p 16379
127.0.0.1:16379>
127.0.0.1:16379>
127.0.0.1:16379> CLUSTER info
cluster_state:fail
cluster_slots_assigned:0
cluster_slots_ok:0
cluster_slots_pfail:0
cluster_slots_fail:0
...
127.0.0.1:16379> CLUSTER SLOTS
Empty slot
直接修复
猜测就是slot分配的问题,进入具体container,重新分配slot
banfushen@banfushen:~/redis-cluster$ docker exec -it redis-node-0 /bin/bash
root@a77b8222eba2:/#
## 先查看命令
root@a77b8222eba2:/# redis-cli --cluster help
Cluster Manager Commands:
create host1:port1 ... hostN:portN
--cluster-replicas <arg>
check host:port
--cluster-search-multiple-owners
info host:port
fix host:port
--cluster-search-multiple-owners
--cluster-fix-with-unreachable-masters
reshard host:port
--cluster-from <arg>
--cluster-to <arg>
--cluster-slots <arg>
--cluster-yes
--cluster-timeout <arg>
--cluster-pipeline <arg>
--cluster-replace
rebalance host:port
--cluster-weight <node1=w1...nodeN=wN>
--cluster-use-empty-masters
--cluster-timeout <arg>
--cluster-simulate
--cluster-pipeline <arg>
--cluster-threshold <arg>
--cluster-replace
add-node new_host:new_port existing_host:existing_port
--cluster-slave
--cluster-master-id <arg>
del-node host:port node_id
call host:port command arg arg .. arg
--cluster-only-masters
--cluster-only-replicas
set-timeout host:port milliseconds
import host:port
--cluster-from <arg>
--cluster-from-user <arg>
--cluster-from-pass <arg>
--cluster-from-askpass
--cluster-copy
--cluster-replace
backup host:port backup_directory
help
For check, fix, reshard, del-node, set-timeout you can specify the host and port of any working node in the cluster.
Cluster Manager Options:
--cluster-yes Automatic yes to cluster commands prompts
## 直接修复
root@a77b8222eba2:/# redis-cli --cluster fix --cluster-search-multiple-owners 127.0.0.1:6379
...
>>> Covering slot 694 with 192.168.88.3:6379
>>> Check for multiple slot owners...
[OK] No multiple owners found.
root@f3f2043dba55:/#
root@f3f2043dba55:/#
root@f3f2043dba55:/#
root@f3f2043dba55:/# redis-cli -p 6379
127.0.0.1:6379> cluster info
cluster_state:ok
cluster_slots_assigned:16384
cluster_slots_ok:16384
cluster_slots_pfail:0
cluster_slots_fail:0
cluster_known_nodes:6
cluster_size:6
cluster_current_epoch:33
cluster_my_epoch:30
cluster_stats_messages_ping_sent:489
cluster_stats_messages_pong_sent:523
cluster_stats_messages_meet_sent:6
cluster_stats_messages_sent:1018
cluster_stats_messages_ping_received:523
cluster_stats_messages_pong_received:495
cluster_stats_messages_received:1018
127.0.0.1:6379> exit
root@f3f2043dba55:/# exit
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