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IX redis(3) 

redis数据迁移:

加载rdb文件(或加载aof文件);

redis replication

 

redis-migrate-tool,此工具适用任何场景,是重点:

https://github.com/vipshop/redis-migrate-toolFeatures特点:

Fast.快速;

Multi-Threads.多线程;

Based on redis replication.基于redis复制;

Live migration.实时迁移;

In the process of migrating data, the source redis can also provide services for users.迁移过程中,源集群不影响对外提供服务;

Heterogeneous migration.异构迁移;

Twemproxy and redis cluster support.支持twemproxy集群,redis集群,rdb文件和aof文件;

When the target is twemproxy, keys are direct imported into redis behind the twemproxy.过滤功能;

Migration Status view.迁移状态显示;

Data Verification Mechanism.完善的数据抽样校验;

source来源可以是:单redis实例、redis clusterrdb文件、aof文件、twemproxy集群;

target目标可以是:单redis实例、redis clusterrdb文件、twemproxy集群;


配置文件rmt.conf常用配置项如下:

type: The group redis type. Possible values are:

single

twemproxy

redis cluster

rdb file

aof file

servers: The list of redis address in the group. If type is twemproxy, this is same as the twemproxy config file. If type is rdb file, this is the filename.

listen: The listening address and port (name:port or ip:port). Defaults to 127.0.0.1:8888.

 

以下操作有:单节点迁到单节点、redis集群迁到redis集群,各用两种方法,其中:

单节点迁到单节点(方一,直接复制并加载rdbaof文件;方二,利用redis复制机制);

redis集群迁到redis集群(两种方法都使用redis-migrate-tool工具;方一,网络隔离情况时,在被迁移端导出rdb文件,再到迁移端加载;方二,相同网段时,在线迁移);

 

1redis单节点数据迁到另一单节点上:

方一:

利用redis启动时加载rdb二进制文件方式(或加载aof文本文件方式),直接将被迁移端的dump.rdb文件(即snapshotting快照文件)上传至迁移端主机;

被迁移端注意:

停连接redis的应用,即禁止往redis里写数据;

redis交互模式下执行>bgsave   #(即重新fork一个线程,用于将当前内存中的数据持久化到磁盘上;若使用加载aof文件,此步用>bgrewriteaof命令);

迁移端注意:

将被迁移端的dump.rdb上传至迁移端指定路径下,即要与配置文件中dirdbfilename配置项一致;

启动前将配置文件中的rdb持久化配置项注释掉,此步重要,即注释掉配置文件中默认的如下三行:

#save 900 1

#save 300 10

#save 60 10000

 

操作:

此例是在一台主机上启动两个redis实例(63796380),将6379上的数据迁到6380上;

在被迁移端(6379)如下操作:

[[email protected] ~]# cd /ane/redis

[[email protected] redis]# redis-cli -p 6379 keys \*

(empty list or set)

[[email protected] redis]# for i in `seq 1 100` ; do redis-cli -p 6379 set key$i value$i ; done  #(模拟产生数据)

……

[[email protected] redis]# redis-cli -p 6379

127.0.0.1:6379> keys *

……

127.0.0.1:6379> bgsave

Background saving started

127.0.0.1:6379> exit

 

在迁移端(6380)上操作:

[[email protected] redis]# redis-cli -p 6380

127.0.0.1:6380> keys *

(empty list or set)

127.0.0.1:6380> exit

[[email protected] redis]# vim redis_6380.conf

#save 900 1

#save 300 10

#save 60 10000

dbfilename dump_6380.rdb

dir /ane/redis/6380/

[[email protected] redis]# redis-cli -p 6380 shutdown

[[email protected] redis]# rm -f /ane/redis/6380/dump_6380.rdb

[[email protected] redis]# cp dump.rdb /ane/redis/6380/dump_6380.rdb  #dump.rdb6379上的持久化数据)

[[email protected] redis]# redis-server /ane/redis/6380/redis_6380.conf

[[email protected] redis]# redis-cli -p 6380

127.0.0.1:6380> keys *

  1)"key64"

  2)"key29"

  3)"key55"

  4)"key67"

  5)"key12"

  6)"key39"

  7)"key26"

  8)"key82"

  9)"key57"

 10)"key48"

……

[[email protected] redis]# vim /ane/redis/6380/redis_6380.conf

save 900 1

save 300 10

save 60 10000

[[email protected] redis]# redis-cli -p 6380 shutdown

[[email protected] redis]# redis-server /ane/redis/6380/redis_6380.conf

[[email protected] redis]# redis-cli -p 6380

127.0.0.1:6380> keys *

  1)"key85"

  2)"key23"

  3)"key94"

  4)"key41"

  5)"key76"

  6)"key24"

  7)"key55"

  8)"key67"

  9)"key43"

 10)"key90"

 11)"key84"

 12)"key86"

……

127.0.0.1:6380> exit

 

方二:

redis replication复制机制,用于两主机在相同网段或两主机可互通的情况下;

注意主从次序,主端数据被清空,若从仍开启slaveof项时,从上数据也会被清空,两端数据是实时同步的;

在迁移端(6380)操作:

[[email protected] redis]# pwd

/ane/redis

[[email protected] redis]# redis-cli -p 6380 shutdown  #(关闭从redis后改配置)

[[email protected] redis]#vim 6380/redis.conf   #(在迁移端即主从模式的从服务器设置主的ipport,也可在交互模式下配置>slaveof 192.168.23.130 6379

# slaveof <masterip><masterport>

slaveof 192.168.23.130 6379

[[email protected] redis]# redis-server 6380/redis.conf   #(启动从redis

 

在被迁移端(6379)操作:

[[email protected] redis]# redis-cli -p 6379 flushall

OK

[[email protected] redis]# for i in `seq 100 1000`; do redis-cli -p 6379 set key$i value$i &> /dev/null ; done   #(模拟产生数据,到迁移端查看是否有)

 

在迁移端(6380)上查看是否有数据:

[[email protected] redis]# redis-cli -p 6380

127.0.0.1:6380> exists key1000

(integer) 1

127.0.0.1:6380> exists key100

(integer) 1

127.0.0.1:6380> exit

[[email protected] redis]# vim 6380/redis.conf   #(待数据传完后,改配置,重启;或在命令行交互模式下执行>slave NO ONE,并改配置文件)

#slaveof 192.168.23.1306379

[[email protected] redis]# redis-cli -p 6380 shutdown

[[email protected] redis]# redis-server 6380/redis.conf

[[email protected] redis]# redis-cli -p 6380

127.0.0.1:6380> exists key100

(integer) 1

127.0.0.1:6380> exists key1000

(integer) 1

127.0.0.1:6380> exit

 

 

2redis 集群数据迁到另一redis集群:

使用redis-migrate-tool工具;

操作:

test1主机redis集群中的数据迁到test2主机;

方一:

适合两台主机不在一个网段,网络隔离情况;

test1test2均需安装redis-migrate-tool,利用此工具先将test1主机上的redis集群中的数据导出为rdb文件,再将rdb文件上传至test2并恢复到redis集群中;

 

test1(被迁移端)上操作如下:

[[email protected] ~]# cd /ane

[[email protected] ane]# yum -y install automake libtool autoconf bzip2

[[email protected] ane]# unzip /usr/local/src/redis-migrate-tool-master.zip -d /ane

[[email protected] ane]# cd redis-migrate-tool-master

[[email protected] redis-migrate-tool-master]# autoreconf -fvi

[[email protected] redis-migrate-tool-master]# ./configure

[[email protected] redis-migrate-tool-master]# make

 

[[email protected] redis-migrate-tool-master]# vim /etc/profile.d/redis.sh

export PATH=$PATH:/ane/redis/bin:/ane/redis-migrate-tool-master/src

[[email protected] redis-migrate-tool-master]# ./etc/profile.d/redis.sh

[[email protected] redis-migrate-tool-master]# which redis-migrate-tool

/ane/redis-migrate-tool-master/src/redis-migrate-tool

[[email protected] redis-migrate-tool-master]# redis-migrate-tool -h

……

  -d,--daemonize        : run as a daemon

  -o,--output=S         : set logging file(default: stderr)

  -c,--conf-file=S      : set configurationfile (default: rmt.conf)

  -C,--command=S        : set command toexecute (default: redis_migrate)

[[email protected] redis-migrate-tool-master]# cd..

 

[[email protected] ane]# redis-cli -c -h 192.168.23.129 -p 6379 keys \*

(empty list or set)

[[email protected] ane]# for i in `seq 101 2000` ; do redis-cli -c -h 192.168.23.129 -p 6379 set key$i value$i &> /dev/null ; done   #(模拟往test1主机上的redis集群中插入数据)

[[email protected] ane]# redis-cli -c -h 192.168.23.129 -p 6379

192.168.23.129:6379> exists key101

(integer) 1

192.168.23.129:6379> exists key2000

-> Redirected to slot [9780] located at192.168.23.129:6380

(integer) 1

192.168.23.129:6380> exit

 

[[email protected] ane]# cp redis-migrate-tool-master/rmt.conf redis-migrate-tool-master/rmt.conf.example

[[email protected] ane]# vim redis-migrate-tool-master/rmt.conf

[source]

type: redis cluster

servers:

 - 192.168.23.129:6379

[target]

type: rdb file

[common]

listen: 0.0.0.0:8888

[[email protected] ane]# redis-migrate-tool -c redis-migrate-tool-master/rmt.conf -o log.txt -d

[[email protected] ane]# tail -f log.txt   #(查看日志是否报错)

……

[[email protected] ane]# cat log.txt   #(日志中有详细操作过程)

……

[[email protected] ane]# ll -h   #(在当前目录下生成了三个rdb文件(该集群是6个节点,33从),将这三个文件上传到迁移端恢复即可)

total 60K

-rw-r--r--. 1 root root 4.2K Mar 17 01:26log.txt

-rw-r--r--. 1 root root  12K Mar 17 01:26 node192.168.23.129:6379-1489739168652097-11514.rdb

-rw-r--r--. 1 root root  12K Mar 17 01:26 node192.168.23.129:6380-1489739168552203-11514.rdb

-rw-r--r--. 1 root root  12K Mar 17 01:26 node192.168.23.129:6381-1489739168455476-11514.rdb

drwxr-xr-x. 9 root root 4.0K Mar  2 18:52 redis

drwxr-xr-x. 9 root root 4.0K Mar 17 01:23redis-migrate-tool-master

-rwxr-xr-x. 1 root root  163 Mar 3 00:32 shutdown_redis.sh

-rwxr-xr-x. 1 root root  140 Mar 3 00:34 startup_redis.sh

[[email protected] ane]# mv node192.168.23.129\:6379-1489739168652097-11514.rdb node129-6379.rdb   #(将生成的这三个文件改名,防止特殊字符(如冒号等)影响操作)

[[email protected] ane]# mv node192.168.23.129\:6380-1489739168552203-11514.rdb node129-6380.rdb

[[email protected] ane]# mv node192.168.23.129\:6381-1489739168455476-11514.rdb node129-6381.rdb

[[email protected] ane]# scp node129-63*[email protected]:/ane   #(传至迁移端)

[[email protected] ane]# redis-migrate-tool-h 127.0.0.1 -p 8888 shutdown   #(关闭redis-migrate-tool

 

test2上操作如下:

安装redis-migrate-tool

[[email protected] ane]# redis-cli -c -h 192.168.23.130-p 6379

192.168.23.130:6379> keys *

(empty list or set)

192.168.23.130:6379> exit

[[email protected] ane]# vim redis-migrate-tool-master/rmt.conf

[source]

type: rdb file

servers:

 - /ane/node129-6379.rdb

 - /ane/node129-6380.rdb

 - /ane/node129-6381.rdb

[target]

type: redis cluster

servers:

 - 192.168.23.130:6379

[common]

listen: 0.0.0.0:8888

[[email protected] ane]# redis-migrate-tool -c redis-migrate-tool-master/rmt.conf -o log.txt -d

[[email protected] ane]# tail -f log.txt

……

[[email protected] ane]# redis-cli -c -h 192.168.23.130 -p 6379

192.168.23.130:6379> exists key101

(integer) 1

192.168.23.130:6379> exists key2000

-> Redirected to slot [9780] located at192.168.23.130:6380

(integer) 1

192.168.23.130:6380> keys *

……

192.168.23.130:6380> exit

[[email protected] ane]# redis-migrate-tool -h 127.0.0.1 -p 8888 shutdown  

 

方二:

适合两台主机在一个网段,在线迁移:

确保两台主机的redis集群都在运行状态;

两个主机(被迁移端和迁移端)任意一个上安装redis-migrate-tool即可,此例是在test2上安装;

在迁移端test2上操作:

[[email protected] ~]# cd /ane

[[email protected] ane]# redis-cli -c -h 192.168.23.130 -p 6379

192.168.23.130:6379> flushall

OK

192.168.23.130:6379> keys *

(empty list or set)

192.168.23.130:6379> exit

 

[[email protected] ane]# vim redis-migrate-tool-master/rmt.conf

[source]

type: redis cluster

servers:

- 192.168.23.129:6379

[target]

type: redis cluster

servers:

- 192.168.23.130:6379

[common]

listen: 0.0.0.0:8888

[[email protected] ane]# redis-migrate-tool -c redis-migrate-tool-master/rmt.conf -o log.txt -d

[[email protected] ane]# tail -f log.txt   #(查看是否有报错)

[[email protected] ane]# redis-cli -c -h 192.168.23.130 -p 6379   #(查看是否有数据)

192.168.23.130:6379> exists key2000

-> Redirected to slot [9780] located at192.168.23.130:6380

(integer) 1

192.168.23.130:6380> exit

 

[[email protected] ane]# redis-cli-h 127.0.0.1 -p 8888   #(连接redis-migrate-tool监控的端口)

127.0.0.1:8888> info

# Server

version:0.1.0

os:Linux 2.6.32-431.el6.x86_64 x86_64

multiplexing_api:epoll

gcc_version:4.4.7

process_id:25904

tcp_port:8888

uptime_in_seconds:196

uptime_in_days:0

config_file:/ane/redis-migrate-tool-master/rmt.conf

 

# Clients

connected_clients:1

max_clients_limit:100

total_connections_received:1

 

# Memory

mem_allocator:jemalloc-4.0.4

 

# Group

source_nodes_count:3

target_nodes_count:3

 

# Stats

all_rdb_received:1

all_rdb_parsed:1

all_aof_loaded:0

rdb_received_count:3

rdb_parsed_count:3

aof_loaded_count:0

total_msgs_recv:1901

total_msgs_sent:1901

total_net_input_bytes:35215

total_net_output_bytes:76137

total_net_input_bytes_human:34.39K

total_net_output_bytes_human:74.35K

total_mbufs_inqueue:0

total_msgs_outqueue:0

127.0.0.1:8888> exit

 

[[email protected] ane]# redis-migrate-tool-c redis-migrate-tool-master/rmt.conf -o log.txt -C redis_check   #(数据校验)

Check job is running...

 

Checked keys: 1000

Inconsistent value keys: 0

Inconsistent expire keys : 0

Other check error keys: 0

Checked OK keys: 1000

 

All keys checked OK!

Check job finished, used 0.045s

[[email protected] ane]# redis-migrate-tool -h 127.0.0.1 -p 8888 shutdown

 

 

 


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