redis-trib.rb reshard针对有键值的slot迁移失败 Wrong number of arguments for specified sub command

我不是女神ヾ 2021-10-15 07:01 315阅读 0赞

运行环境：

redis ：4.0

redis-trib.rb redis集群管理脚本

ruby: 2.6.3

在执行reshard命令时发现迁移有键值的slot时就会报错Wrong number of arguments for specified sub command，谷歌找到的答案是redis-trib.rb脚本的兼容性问题，需要修改这个脚本migrate部分代码：

\# Migrate all the keys from source to target using the MIGRATE command  
        while true  
            keys = source.r.cluster("getkeysinslot",slot,o\[:pipeline\])  
            break if keys.length == 0  
            begin  
                source.r.**client.**call(\["migrate",target.info\[:host\],target.info\[:port\],"",0,@timeout,:keys,\*keys\])  
            rescue => e  
                if o\[:fix\] && e.to\_s =~ /BUSYKEY/  
                    xputs "\*\*\* Target key exists. Replacing it for FIX."  
                    source.r.**client.**call(\["migrate",target.info\[:host\],target.info\[:port\],"",0,@timeout,:replace,:keys,\*keys\])

将标红部分删除即可，即变成下面：

\# Migrate all the keys from source to target using the MIGRATE command  
        while true  
            keys = source.r.cluster("getkeysinslot",slot,o\[:pipeline\])  
            break if keys.length == 0  
            begin  
                source.r.call(\["migrate",target.info\[:host\],target.info\[:port\],"",0,@timeout,:keys,\*keys\])  
            rescue => e  
                if o\[:fix\] && e.to\_s =~ /BUSYKEY/  
                    xputs "\*\*\* Target key exists. Replacing it for FIX."  
                    source.r.call(\["migrate",target.info\[:host\],target.info\[:port\],"",0,@timeout,:replace,:keys,\*keys\])

参考文章：

[https://github.com/antirez/redis/issues/2547][https_github.com_antirez_redis_issues_2547]

[https_github.com_antirez_redis_issues_2547]: https://github.com/antirez/redis/issues/2547