https://github.com/vipshop/redis-migrate-tool
一.安装redis-migrate-tool
a.下载redis-migrate-tool软件包 https://codeload.github.com/vipshop/redis-migrate-tool/zip/master
b.安装autoconf yum install autoconf automake libtool
注意：autoconf需要2.64以上版本
rpm -e --nodeps autoconf-2.63
cd /usr/local/src
wget ftp://ftp.gnu.org/gnu/autoconf/autoconf-2.68.tar.gz
tar -zxvf autoconf-2.68.tar.gz
cd autoconf-2.68
./configure --prefix=/usr
make && make install
c.解压安装
cd /usr/local/src
unzip redis-migrate-tool-master.zip
cd redis-migrate-tool-master
autoreconf -fvi
./configure --prefix=/usr/local/redis-migrate/
make
make install
echo "export PATH=$PATH:/usr/local/redis-migrate/sbin">>/etc/profile
source /etc/profile
二.测试
测试环境简介(redis版本3.0.5，redis3.2版本不能使用此迁移工具)
主机：192.168.196.128
实例：192.168.196.128:6001....192.168.196.128:6008（共8个实例）
安装目录及结构如下：（其中.sh结尾的文件为自定义的快捷脚本）
[root@vhost02 redis-cluster3.0]# pwd
/usr/local/redis-cluster3.0
[root@vhost02 redis-cluster3.0]# ll
total 112
drwxr-xr-x. 2 root root 4096 May 18 01:45 bin
drwxr-xr-x. 2 root root 4096 May 18 02:29 etc
-rwxr-xr-x. 1 root root 80 May 18 02:24 load_data.sh
drwxr-xr-x. 2 root root 4096 May 18 02:07 redis6001
drwxr-xr-x. 2 root root 4096 May 18 02:40 redis6002
drwxr-xr-x. 2 root root 4096 May 18 02:40 redis6003
drwxr-xr-x. 2 root root 4096 May 18 01:45 redis6004
drwxr-xr-x. 2 root root 4096 May 18 01:45 redis6005
drwxr-xr-x. 2 root root 4096 May 18 02:23 redis6006
drwxr-xr-x. 2 root root 4096 May 18 02:23 redis6007
drwxr-xr-x. 2 root root 4096 May 18 02:23 redis6008
-rwxr-xr-x. 1 root root 49186 May 18 02:26 redis-trib.rb
-rwxr-xr-x. 1 root root 12 May 18 01:56 shutdown-all.sh
-rwxr-xr-x. 1 root root 100 May 18 01:56 shutdown-cluster.sh
-rwxr-xr-x. 1 root root 660 May 18 02:03 startup-all.sh
-rwxr-xr-x. 1 root root 99 May 18 02:00 startup-cluster.sh
1.有数据集群到无数据单点
a.搭建集群（192.168.196.128:6001 192.168.196.128:6002 192.168.196.128:6003此处略去集群搭建过程）
b.使用脚本往集群中添加数据
more load_data.sh
#!/bin/bash
for((i=1;i<=20000;i++))
do
redis-cli -c -p 6001 set k$i v$i
done
c.检查下集群中的数据
redis-cli -c -p 6003
127.0.0.1:6001> info
...
# Keyspace
db0:keys=6656,expires=0,avg_ttl=0
d.启动单实例192.168.196.128:6004,并查看数据
[root@vhost02 redis-cluster]# ./startup-all.sh
please enter the number that you want to startup[1|2|3|4..|all]4
startup redis04 ...
redis04 is ok
redis-cli -p 6004
127.0.0.1:6004> info
...
# Keyspace
e.修改迁移配置文件
mkdir /usr/local/redis-migrate/etc
vi c-s-rmt.conf
[source]
type: redis cluster
servers:
- 192.168.196.128:6001
[target]
type: single
servers:
- 192.168.196.128:6004
[common]
threads: 1
step: 5
mbuf_size: 512
source_safe: false
f.迁移
redis-migrate-tool -c /usr/local/redis-migrate/etc/c-s-rmt.conf -o c-s.log -d
g.检查数据
redis-cli -p 6004
# Keyspace
db0:keys=20000,expires=0,avg_ttl=0
h.集群写，单实例是否同步
往集群实例6001中写添加key kx001
添加成功后，查看6004中key总理，并查看kx001
# Keyspace
db0:keys=20001,expires=0,avg_ttl=0
127.0.0.1:6004> get kx001
"x001"
同理删除key值
结论：同步 redis-migrate-tool进程一直在后台运行，断掉进程后就不再同步。如果后面修改source上的数据target上没有也不会报错，动作仍旧会同步。
2.单点到集群
vi s-c-rmt.conf
[source]
type: single
servers:
- 192.168.196.128:6004
[target]
type: redis cluster
servers:
- 192.168.196.128:6001
[common]
threads: 1
step: 5
mbuf_size: 512
source_safe: false
结论：同上
3.单点到单点
more s-s-rmt.conf
[source]
type: single
servers:
- 192.168.196.128:6004
[target]
type: single
servers:
- 192.168.196.128:6005
[common]
threads: 1
step: 5
mbuf_size: 512
source_safe: false
结论：同上
4.三节点集群到三节点集群
more c-c-rmt.conf
[source]
type: redis cluster
servers:
- 192.168.196.128:6001
[target]
type: redis cluster
servers:
- 192.168.196.128:6006
[common]
threads: 1
step: 5
mbuf_size: 512
source_safe: false
结论：同上
作者：jane.hoo 出处：jane.hoo的博客 http://www.cnblogs.com/janehoo/ [人生不设限,生命不息，折腾不止] 您的支持是对博主最大的鼓励，感谢您的认真阅读。本文版权归作者所有，欢迎转载，但请保留该声明。