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、基本功能

redis-shake它支持解析、恢复、备份、同步四个功能

恢复restore：将RDB文件恢复到目的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命令进行迁移，支持不同云厂商不同redis版本的迁移。

二、基本原理

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.源实例会再把增量命令发送给 Redis-shake ，Redis-shake负责把这些增量命令再同步给目的实例。

四、RedisShake安装

确保您在本地机器上设置了 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：

4.3、修改shake.toml配置文件

function = ""[sync_reader]
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#[scan_reader]
#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 [1,5,7], 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# [rdb_reader]
# filepath = "/tmp/dump.rdb"# [aof_reader]
# filepath = "/tmp/.aof"
# timestamp = 0              # subsecond[redis_writer]
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[advanced]
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[module]
# 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