Redis数据迁移-RedisShake
redis-shake是阿里云Redis团队开源的用于Redis数据迁移和数据过滤的工具。一、根本功能
redis-shake它支持解析、规复、备份、同步四个功能
规复restore：将RDB文件规复到目的redis数据库。
备份dump：将源redis的全量数据通过RDB文件备份起来。
解析decode：对RDB文件进行读取，并以json格式解析存储。
同步sync：支持源redis和目的redis的数据同步，支持全量和增量数据的迁移，支持单节点、主从版、集群版之间的互相同步。
同步rump：支持源redis和目的redis的数据同步，仅支持全量的迁移,采用scan和restore下令进行迁移，支持不同云厂商不同redis版本的迁移。
二、根本原理
https://img-blog.csdnimg.cn/direct/778215d71116475ca879eb93f6f8e277.png
三、RedisShake同步原理
1.源Redis服务实例相当于主库，Redis-shake相当于从库，它会发送psync指令给源Redis服务实例。
2.源Redis实例先把RDB文件传输给 Redis-shake ，Redis-shake 会把RDB文件发送给目的实例。
3.源实例会再把增量下令发送给 Redis-shake ，Redis-shake负责把这些增量下令再同步给目的实例。
四、RedisShake安装
确保您在当地呆板上设置了 Golang 环境。
4.1、release包下载
Releases · tair-opensource/RedisShake · GitHub
4.2、解压
tar -zxvf redis-shake-linux-amd64.tar.gz -C /home/redisshake/ 解压完了之后有两个文件：
https://img-blog.csdnimg.cn/direct/26762236cbf44e1fb5f1507c7b0e54d1.png
4.3、修改shake.toml配置文件
function = ""
cluster = false # set to true if source is a redis cluster
address = "127.0.0.1:6379" # when cluster is true, set address to one of the cluster node
username = "" # keep empty if not using ACL
password = "" # keep empty if no authentication is required
tls = false
sync_rdb = true # set to false if you don't want to sync rdb
sync_aof = true # set to false if you don't want to sync aof
prefer_replica = true # set to true if you want to sync from replica node
#
#cluster = false # set to true if source is a redis cluster
#address = "127.0.0.1:6379" # when cluster is true, set address to one of the cluster node
#username = "" # keep empty if not using ACL
#password = "" # keep empty if no authentication is required
#tls = false
#dbs = [] # set you want to scan dbs such as , if you don't want to scan all
#scan = true # set to false if you don't want to scan keys
#ksn = false # set to true to enabled Redis keyspace notifications (KSN) subscription
#count = 1 # number of keys to scan per iteration
#
# filepath = "/tmp/dump.rdb"
#
# filepath = "/tmp/.aof"
# timestamp = 0 # subsecond
cluster = false # set to true if target is a redis cluster
sentinel = false # set to true if target is a redis sentinel
master = "" # set to master name if target is a redis sentinel
address = "192.168.72.129:6379" # when cluster is true, set address to one of the cluster node
username = "" # keep empty if not using ACL
password = "" # keep empty if no authentication is required
tls = false
off_reply = false # ture off the server reply
dir = "data"
ncpu = 0 # runtime.GOMAXPROCS, 0 means use runtime.NumCPU() cpu cores
pprof_port = 0# pprof port, 0 means disable
status_port = 0 # status port, 0 means disable
# log
log_file = "shake.log"
log_level = "info" # debug, info or warn
log_interval = 5 # in seconds
# redis-shake gets key and value from rdb file, and uses RESTORE command to
# create the key in target redis. Redis RESTORE will return a "Target key name
# is busy" error when key already exists. You can use this configuration item
# to change the default behavior of restore:
# panic: redis-shake will stop when meet "Target key name is busy" error.
# rewrite: redis-shake will replace the key with new value.
# ignore:redis-shake will skip restore the key when meet "Target key name is busy" error.
rdb_restore_command_behavior = "panic" # panic, rewrite or skip
# redis-shake uses pipeline to improve sending performance.
# This item limits the maximum number of commands in a pipeline.
pipeline_count_limit = 1024
# Client query buffers accumulate new commands. They are limited to a fixed
# amount by default. This amount is normally 1gb.
target_redis_client_max_querybuf_len = 1024_000_000
# In the Redis protocol, bulk requests, that are, elements representing single
# strings, are normally limited to 512 mb.
target_redis_proto_max_bulk_len = 512_000_000
# If the source is Elasticache or MemoryDB, you can set this item.
aws_psync = "" # example: aws_psync = "10.0.0.1:6379@nmfu2sl5osync,10.0.0.1:6379@xhma21xfkssync"
# destination will delete itself entire database before fetching files
# from source during full synchronization.
# This option is similar redis replicas RDB diskless load option:
# repl-diskless-load on-empty-db
empty_db_before_sync = false
# The data format for BF.LOADCHUNK is not compatible in different versions. v2.6.3 <=> 20603
target_mbbloom_version = 20603
官方使用指导手册：
Sync Reader | RedisShake 4.4、启动RediShake
./redis-shake shake.toml https://img-blog.csdnimg.cn/direct/e9c73d5bc0ab411fbd72dae4563a1b91.png
4.5、测试数据迁移
在192.168.72.128这台呆板上插入几个key
https://img-blog.csdnimg.cn/direct/2c0da3d325b14795af04486eec69fa3d.png
可以看到RedisShake工具在实施监听key，有新增的就会把新增的key迁移到另外一呆板的redis中；看打印的日记是写了4条数据
https://img-blog.csdnimg.cn/direct/98420c9f25d6467d8120683ea735057e.png
在192.168.72.129这台呆板上查看迁移的数据
https://img-blog.csdnimg.cn/direct/265fcc7a60dc4f6186c97fa1d6d2e6bb.png
4.5、数据校验
通过info keyspace下令，查看所有的key和过期key的数量。
https://img-blog.csdnimg.cn/direct/9bd1a4bcc5284539b375e5e8b7158653.png
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