Redis5.0redis-cli--clusterhelp说明
背景：
Redis Cluster 在5.0之后取消了ruby脚本 redis-trib.rb的⽀持（⼿动命令⾏添加集的⽅式不变），集合到redis-cli⾥，避免了再安装ruby的相关环境。直接使⽤redis-clit的参数--cluster 来
取代。为⽅便⾃⼰后⾯查询就说明下如何使⽤该命令进⾏Cluster的创建和管理，关于Cluster的相关说明可以查看或则。
环境：
系统版本：Ubuntu 14.04
Redis版本：5.0.5
机器IP：192.168.163.132
说明：redis-cli --cluster help
redis-cli --cluster help
Cluster Manager Commands:
create host1:port1 ... hostN:portN #创建集
--cluster-replicas <arg> #从节点个数 check host:port #检查集
--cluster-search-multiple-owners #检查是否有槽同时被分配给了多个节点
info host:port #查看集状态
fix host:port #修复集
--cluster-search-multiple-owners #修复槽的重复分配问题
reshard host:port #指定集的任意⼀节点进⾏迁移slot，重新分slots --cluster-from <arg> #需要从哪些源节点上迁移slot，可从多个源节点完成迁移，以逗号隔开，传递的是节点的node id，还可以直接传递--from all，这样源节点就是集的所有节点，不传递该参数的话，则会在迁移过程中提⽰⽤户输 --cluster-to <arg> #slot需要迁移的⽬的节点的n
ode id，⽬的节点只能填写⼀个，不传递该参数的话，则会在迁移过程中提⽰⽤户输⼊
--cluster-slots <arg> #需要迁移的slot数量，不传递该参数的话，则会在迁移过程中提⽰⽤户输⼊。
--cluster-yes #指定迁移时的确认输⼊
--cluster-timeout <arg> #设置migrate命令的超时时间
--cluster-pipeline <arg> #定义cluster getkeysinslot命令⼀次取出的key数量，不传的话使⽤默认值为10
--cluster-replace #是否直接replace到⽬标节点
rebalance host:port #指定集的任意⼀节点进⾏平衡集节点slot数量
--cluster-weight <deN=wN> #指定集节点的权重
--cluster-use-empty-masters #设置可以让没有分配slot的主节点参与，默认不允许
--cluster-timeout <arg> #设置migrate命令的超时时间
--cluster-simulate #模拟rebalance操作，不会真正执⾏迁移操作
--cluster-pipeline <arg> #定义cluster getkeysinslot命令⼀次取出的key数量，默认值为10
--cluster-threshold <arg> #迁移的slot阈值超过threshold，执⾏rebalance操作
--cluster-replace #是否直接replace到⽬标节点
add-node new_host:new_port existing_host:existing_port #添加节点，把新节点加⼊到指定的集，默认添加主节点
--cluster-slave #新节点作为从节点，默认随机⼀个主节点
--cluster-master-id <arg> #给新节点指定主节点
del-node host:port node_id #删除给定的⼀个节点，成功后关闭该节点服务
call host:port command arg arg .. arg #在集的所有节点执⾏相关命令
set-timeout host:port milliseconds #设置cluster-node-timeout
import host:port #将外部redis数据导⼊集
--cluster-from <arg> #将指定实例的数据导⼊到集
--cluster-copy #migrate时指定copy
--cluster-replace #migrate时指定replace
help
For check, fix, reshard, del-node, set-timeout you can specify the host and port of any working node in the cluster.
注意：Redis Cluster最低要求是3个主节点，如果需要集需要认证，则在最后加⼊-a xx即可。
①创建集主节点
redis-cli --cluster create 192.168.163.132:6379192.168.163.132:6380192.168.163.132:6381
>>> Performing hash slots allocation on
Master[0] -> Slots 0 - 5460视觉定位系统
Master[1] -> Slots 5461 - 10922
Master[2] -> Slots 10923 - 16383
M: 117457eab5071954faab5e81c3170600d5192270 192.168.163.132:6379
slots:[0-5460] (5461 slots) master
M: 815da8448f5d5a304df0353ca10d8f9b77016b28 192.168.163.132:6380
slots:[5461-10922] (5462 slots) master
M: 56005b9413cbf225783906307a2631109e753f8f 192.168.163.132:6381
slots:[10923-16383] (5461 slots) master
Can I set the above configuration? (type 'yes' to accept): yes #slot分配
>>> Nodes configuration updated
数码理疗仪>>> Assign a different config epoch to each node
>>> Sending CLUSTER MEET messages to join the cluster
Waiting for the cluster to join
..
>>> Performing Cluster Check (using node 192.168.163.132:6379)
M: 117457eab5071954faab5e81c3170600d5192270 192.168.163.132:6379
slots:[0-5460] (5461 slots) master
M: 56005b9413cbf225783906307a2631109e753f8f 192.168.163.132:6381
slots:[10923-16383] (5461 slots) master
M: 815da8448f5d5a304df0353ca10d8f9b77016b28 192.168.163.132:6380
slots:[5461-10922] (5462 slots) master
[OK] All nodes agree about slots configuration.
>>> Check for
>>> Check
[OK] All 16384 slots covered.
View Code
②创建集主从节点
/redis-cli --cluster create 192.168.163.132:6379192.168.163.132:6380192.168.163.132:6381192.168.163.132:6382192.168.163.132:6383192.168.163.132:6384 --cluster-replicas 1
说明：--cluster-replicas 参数为数字，1表⽰每个主节点需要1个从节点。
>>> Performing hash slots allocation on
Master[0] -> Slots 0 - 5460
Master[1] -> Slots 5461 - 10922
Master[2] -> Slots 10923 - 16383
Adding replica 192.168.163.132:6383 to 192.168.163.132:6379
Adding replica 192.168.163.132:6384 to 192.168.163.132:6380
Adding replica 192.168.163.132:6382 to 192.168.163.132:6381
>>> Trying to optimize slaves allocation for anti-affinity
[WARNING] Some slaves are in the same host as their master
M: 117457eab5071954faab5e81c3170600d5192270 192.168.163.132:6379
slots:[0-5460] (5461 slots) master
M: 815da8448f5d5a304df0353ca10d8f9b77016b28 192.168.163.132:6380
slots:[5461-10922] (5462 slots) master
M: 56005b9413cbf225783906307a2631109e753f8f 192.168.163.132:6381
slots:[10923-16383] (5461 slots) master
S: 3a1d04983ab6c4ae853f9602dd922d4ebadc4dbf 192.168.163.132:6382
replicates 56005b9413cbf225783906307a2631109e753f8f
S: 0c21b6cee354594a23f4d5abf0d01b48bdc96d55 192.168.163.132:6383
replicates 117457eab5071954faab5e81c3170600d5192270
S: f6a6957421b80409106cb36be3c7ba41f3b603ff 192.168.163.132:6384
replicates 815da8448f5d5a304df0353ca10d8f9b77016b28
Can I set the above configuration? (type 'yes' to accept): yes
>>> Nodes configuration updated
>>> Assign a different config epoch to each node
>>> Sending CLUSTER MEET messages to join the cluster
Waiting for the cluster to join
..
>>> Performing Cluster Check (using node 192.168.163.132:6379)
M: 117457eab5071954faab5e81c3170600d5192270 192.168.163.132:6379
slots:[0-5460] (5461 slots) master
1 additional replica(s)
M: 815da8448f5d5a304df0353ca10d8f9b77016b28 192.168.163.132:6380
slots:[5461-10922] (5462 slots) master
1 additional replica(s)
S: 3a1d04983ab6c4ae853f9602dd922d4ebadc4dbf 192.168.163.132:6382
slots: (0 slots) slave
replicates 56005b9413cbf225783906307a2631109e753f8f
S: 0c21b6cee354594a23f4d5abf0d01b48bdc96d55 192.168.163.132:6383
slots: (0 slots) slave
replicates 117457eab5071954faab5e81c3170600d5192270
M: 56005b9413cbf225783906307a2631109e753f8f 192.168.163.132:6381
slots:[10923-16383] (5461 slots) master
1 additional replica(s)
S: f6a6957421b80409106cb36be3c7ba41f3b603ff 192.168.163.132:6384
slots: (0 slots) slave
replicates 815da8448f5d5a304df0353ca10d8f9b77016b28
[OK] All nodes agree about slots configuration.
>>> Check for
>>> Check
[OK] All 16384 slots covered.
View Code
通过该⽅式创建的带有从节点的机器不能够⾃⼰⼿动指定主节点，所以如果需要指定的话，需要⾃⼰⼿动指定，先使⽤①或③创建好主节点后，再通过④来处理。
③添加集主节点
redis-cli --cluster add-node 192.168.163.132:6382192.168.163.132:6379
说明：为⼀个指定集添加节点，需要先连到该集的任意⼀个节点IP（192.168.163.132:6379），再把新节点加⼊。该2个参数的顺序有要求：新加⼊的节点放前
>>> Adding node 192.168.163.132:6382 to cluster 192.168.163.132:6379
>>> Performing Cluster Check (using node 192.168.163.132:6379)
M: 117457eab5071954faab5e81c3170600d5192270 192.168.163.132:6379
slots:[0-5460] (5461 slots) master
电容触摸按键
M: 815da8448f5d5a304df0353ca10d8f9b77016b28 192.168.163.132:6380
slots:[5461-10922] (5462 slots) master
M: 56005b9413cbf225783906307a2631109e753f8f 192.168.163.132:6381
slots:[10923-16383] (5461 slots) master
[OK] All nodes agree about slots configuration.
>>> Check for
>>> Check
[OK] All 16384 slots covered.
>>> Send CLUSTER MEET to node 192.168.163.132:6382 to make it join the cluster.
[OK] New node added correctly.
View Code
④添加集从节点
redis-cli --cluster add-node 192.168.163.132:6382192.168.163.132:6379 --cluster-slave --cluster-master-id 117457eab5071954faab5e81c3170600d5192270
说明：把6382节点加⼊到6379节点的集中，并且当做node_id为 117457eab5071954faab5e81c3170600d5192270 的从节点。如果不指定 --cluster-master-id 会随机分配到任意⼀个主节点。
>>> Adding node 192.168.163.132:6382 to cluster 192.168.163.132:6379
>>> Performing Cluster Check (using node 192.168.163.132:6379)
M: 117457eab5071954faab5e81c3170600d5192270 192.168.163.132:6379
slots:[0-5460] (5461 slots) master
M: 815da8448f5d5a304df0353ca10d8f9b77016b28 192.168.163.132:6380
slots:[5461-10922] (5462 slots) master
M: 56005b9413cbf225783906307a2631109e753f8f 192.168.163.132:6381
slots:[10923-16383] (5461 slots) master
[OK] All nodes agree about slots configuration.
>>> Check for
>>> Check
[OK] All 16384 slots covered.
>>> Send CLUSTER MEET to node 192.168.163.132:6382 to make it join the cluster.
Waiting for the cluster to join
..
>>> Configure node as replica of 192.168.163.132:6379.
View Code
⑤删除节点
redis-cli --cluster del-node 192.168.163.132:6384 f6a6957421b80409106cb36be3c7ba41f3b603ff
说明：指定IP、端⼝和node_id 来删除⼀个节点，从节点可以直接删除，有slot分配的主节点不能直接删除。删除之后，该节点会被shutdown。
删除从节点：
redis-cli --cluster del-node 192.168.163.132:6384 f6a6957421b80409106cb36be3c7ba41f3b603ff
>>> Removing node f6a6957421b80409106cb36be3c7ba41f3b603ff from cluster 192.168.163.132:6384
>>> Sending CLUSTER FORGET messages to
>>> SHUTDOWN the node.
删除主节点：
redis-cli --cluster del-node 192.168.163.132:6380 815da8448f5d5a304df0353ca10d8f9b77016b28
>>> Removing node 815da8448f5d5a304df0353ca10d8f9b77016b28 from cluster 192.168.163.132:6380
[ERR] Node 192.168.163.132:6380 is not empty! Reshard data away and try again.
View Code
注意：当被删除掉的节点重新起来之后不能⾃动加⼊集，但其和主的复制还是正常的，也可以通过该节点看到集信息（通过其他正常节点已经看不到该被del-node节点的信息）。
如果想要再次加⼊集，则需要先在该节点执⾏cluster reset，再⽤add-node进⾏添加，进⾏增量同步复制。
到此，⽬前整个集的状态如下：
192.168.163.132:6379> cluster nodes
815da8448f5d5a304df0353ca10d8f9b77016b28 192.168.163.132:6380@16380 master - 015697482971772 connected 5461-10922
0c21b6cee354594a23f4d5abf0d01b48bdc96d55 192.168.163.132:6383@16383 slave 56005b9413cbf225783906307a2631109e753f8f 015697482950004 connected
3a1d04983ab6c4ae853f9602dd922d4ebadc4dbf 192.168.163.132:6382@16382 slave 815da8448f5d5a304df0353ca10d8f9b77016b28 015697482950005 connected
117457eab5071954faab5e81c3170600d5192270 192.168.163.132:6379@16379 myself,master - 015697482970001 connected 0-5460
56005b9413cbf225783906307a2631109e753f8f 192.168.163.132:6381@16381 master - 015697482950003 connected 10923-16383
f6a6957421b80409106cb36be3c7ba41f3b603ff 192.168.163.132:6384@16384 slave 117457eab5071954faab5e81c3170600d5192270 015697482981856 connected
⑥检查集
redis-cli --cluster check 192.168.163.132:6384 --cluster-search-multiple-owners
说明：任意连接⼀个集节点，进⾏集状态检查
redis-cli --cluster check 192.168.163.132:6384 --cluster-search-multiple-owners
192.168.163.132:6380 () -> 0 keys | 5462 slots | 1 slaves.
192.168.163.132:6381 () -> 0 keys | 5461 slots | 1 slaves.
192.168.163.132:6379 () -> 2 keys | 5461 slots | 1 slaves.
[OK] 2 keys in3 masters.
0.00 keys per slot on average.
>>> Performing Cluster Check (using node 192.168.163.132:6384)
S: f6a6957421b80409106cb36be3c7ba41f3b603ff 192.168.163.132:6384
slots: (0 slots) slave
replicates 117457eab5071954faab5e81c3170600d5192270
S: 0c21b6cee354594a23f4d5abf0d01b48bdc96d55 192.168.163.132:6383
slots: (0 slots) slave
replicates 56005b9413cbf225783906307a2631109e753f8f
M: 815da8448f5d5a304df0353ca10d8f9b77016b28 192.168.163.132:6380
slots:[5461-10922] (5462 slots) master
1 additional replica(s)
M: 56005b9413cbf225783906307a2631109e753f8f 192.168.163.132:6381
slots:[10923-16383] (5461 slots) master
1 additional replica(s)
S: 3a1d04983ab6c4ae853f9602dd922d4ebadc4dbf 192.168.163.132:6382自动感应垃圾桶
slots: (0 slots) slave
replicates 815da8448f5d5a304df0353ca10d8f9b77016b28
M: 117457eab5071954faab5e81c3170600d5192270 192.168.163.132:6379
slots:[0-5460] (5461 slots) master
1 additional replica(s)
[OK] All nodes agree about slots configuration.
>>> Check for
>>> Check
[OK] All 16384 slots covered.
>>> Check for multiple
View Code
⑦集信息查看
redis-cli --cluster info192.168.163.132:6384
说明：检查key、slots、从节点个数的分配情况
/redis-cli --cluster info192.168.163.132:6384
192.168.163.132:6380 () -> 0 keys | 5462 slots | 1 slaves.
192.168.163.132:6381 () -> 0 keys | 5461 slots | 1 slaves.
192.168.163.132:6379 () -> 2 keys | 5461 slots | 1 slaves.
[OK] 2 keys in3 masters.
0.00 keys per slot on average.
⑧修复集
redis-cli --cluster fix 192.168.163.132:6384 --cluster-search-multiple-owners
说明：修复集和槽的重复分配问题
redis-cli --cluster fix 192.168.163.132:6384 --cluster-search-multiple-owners
192.168.163.132:6380 () -> 0 keys | 5462 slots | 1 slaves.
192.168.163.132:6381 () -> 0 keys | 5461 slots | 1 slaves.
192.168.163.132:6379 () -> 2 keys | 5461 slots | 1 slaves.
[OK] 2 keys in3 masters.
0.00 keys per slot on average.
>>> Performing Cluster Check (using node 192.168.163.132:6384)
S: f6a6957421b80409106cb36be3c7ba41f3b603ff 192.168.163.132:6384
slots: (0 slots) slave
replicates 117457eab5071954faab5e81c3170600d5192270
S: 0c21b6cee354594a23f4d5abf0d01b48bdc96d55 192.168.163.132:6383
slots: (0 slots) slave
replicates 56005b9413cbf225783906307a2631109e753f8f
M: 815da8448f5d5a304df0353ca10d8f9b77016b28 192.168.163.132:6380
slots:[5461-10922] (5462 slots) master
1 additional replica(s)
M: 56005b9413cbf225783906307a2631109e753f8f 192.168.163.132:6381
slots:[10923-16383] (5461 slots) master
1 additional replica(s)
S: 3a1d04983ab6c4ae853f9602dd922d4ebadc4dbf 192.168.163.132:6382
slots: (0 slots) slave
replicates 815da8448f5d5a304df0353ca10d8f9b77016b28
M: 117457eab5071954faab5e81c3170600d5192270 192.168.163.132:6379
slots:[0-5460] (5461 slots) master
1 additional replica(s)
[OK] All nodes agree about slots configuration.
>>> Check for
>>> Check
[OK] All 16384 slots covered.
>>> Check for multiple
View Code
⑨设置集的超时时间
redis-cli --cluster set-timeout 192.168.163.132:638210000
说明：连接到集的任意⼀节点来设置集的超时时间参数cluster-node-timeout redis-cli --cluster set-timeout 192.168.163.132:638210000
>>> Reconfiguring node timeout in every
*** New timeout set for192.168.163.132:6382
*** New timeout set for192.168.163.132:6384
*** New timeout set for192.168.163.132:6383
*** New timeout set for192.168.163.132:6379
*** New timeout set for192.168.163.132:6381
*** New timeout set for192.168.163.132:6380
>>> New node timeout set. 6 OK, 0 ERR.
⑩集中执⾏相关命令
redis-cli --cluster call 192.168.163.132:6381 config set requirepass cc
redis-cli -a cc --cluster call 192.168.163.132:6381 config set masterauth cc
redis-cli -a cc --cluster call 192.168.163.132:6381 config rewrite
说明：连接到集的任意⼀节点来对整个集的所有节点进⾏设置。
redis-cli --cluster call 192.168.163.132:6381 config set cluster-node-timeout 12000 >>> Calling config set cluster-node-timeout 12000
192.168.163.132:6381: OK
192.168.163.132:6383: OK
192.168.163.132:6379: OK
192.168.163.132:6384: OK
192.168.163.132:6382: OK
192.168.163.132:6380: OK
...
...
到此，相关集的基本操作已经介绍完，现在说明集迁移的相关操作。
Redis 6.0 新增了⼏个命令：
1，fix 的⼦命令：--cluster-fix-with-unreachable-masters
2，call的⼦命令：--cluster-only-masters、--cluster-only-replicas
3，集节点备份：backup
# /root/redis-6.0.9/src/redis-cli -a default --cluster backup 10.0.10.64:6379 /tmp/
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
>>> Performing Cluster Check (using node 10.0.10.64:6379)
M: e6dbd3d565f359fcadaf660a327ee4cd065f45af 10.0.10.64:6379
slots:[0-5460] (5461 slots) master
1 additional replica(s)
M: d2ecfb84d4b18ff08ea3a18776dc1279b7f43aef 10.0.10.64:6381
slots:[10923-16383] (5461 slots) master
1 additional replica(s)
S: ed9e37583f10f82c9489166cf7efe8f66bf72b8d 10.0.10.64:7380
slots: (0 slots) slave
replicates fd19eabbe5ea089625f24eb95129613901ea2190
S: ff1b8764328ae69a05b67b4c78c9abe7a1571563 10.0.10.64:7379
slots: (0 slots) slave
replicates e6dbd3d565f359fcadaf660a327ee4cd065f45af
S: 44b018f76757608057ea5194c7a1c41fd5440262 10.0.10.64:7381
slots: (0 slots) slave
replicates d2ecfb84d4b18ff08ea3a18776dc1279b7f43aef
M: fd19eabbe5ea089625f24eb95129613901ea2190 10.0.10.64:6380
slots:[5461-10922] (5462 slots) master
1 additional replica(s)
[OK] All nodes agree about slots configuration.
>>> Check for
>>> Check
[OK] All 16384 slots covered.
>>> Node 10.0.10.64:6379 ->
SYNC sent to master, writing 2571005 bytes to '/tmp/redis-node-10.0.10.64-6379-e6dbd3d565f359fcadaf660a327ee4cd065f45af.rdb'
Transfer finished with success.
Transfer finished with success.
>>> Node 10.0.10.64:6381 ->
SYNC sent to master, writing 2561844 bytes to '/tmp/redis-node-10.0.10.64-6381-d2ecfb84d4b18ff08ea3a18776dc1279b7f43aef.rdb'
Transfer finished with success.
Transfer finished with success.
>>> Node 10.0.10.64:6380 ->
SYNC sent to master, writing 2564036 bytes to '/tmp/redis-node-10.0.10.64-6380-fd19eabbe5ea089625f24eb95129613901ea2190.rdb'
Transfer finished with success.
Transfer finished with success.
Saving cluster configuration to: /tmp/nodes.json
[OK] Backup created into: /tmp/
View Code
迁移相关
①在线迁移slot ：在线把集的⼀些slot从集原来slot节点迁移到新的节点，即可以完成集的在线横向扩容和缩容。有2种⽅式进⾏迁移
⼀是根据提⽰来进⾏操作：
直接连接到集的任意⼀节点
redis-cli -a cc --cluster reshard 192.168.163.132:6379
信息如下：
redis-cli -a cc --cluster reshard 192.168.163.132:6379
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
>>> Performing Cluster Check (using node 192.168.163.132:6379)
M: 117457eab5071954faab5e81c3170600d5192270 192.168.163.132:6379
slots:[0-5460] (5461 slots) master
1 additional replica(s)
M: 815da8448f5d5a304df0353ca10d8f9b77016b28 192.168.163.132:6380
slots:[5461-10922] (5462 slots) master
1 additional replica(s)
S: 0c21b6cee354594a23f4d5abf0d01b48bdc96d55 192.168.163.132:6383
slots: (0 slots) slave
replicates 56005b9413cbf225783906307a2631109e753f8f
S: 3a1d04983ab6c4ae853f9602dd922d4ebadc4dbf 192.168.163.132:6382
slots: (0 slots) slave
replicates 815da8448f5d5a304df0353ca10d8f9b77016b28
M: 56005b9413cbf225783906307a2631109e753f8f 192.168.163.132:6381
slots:[10923-16383] (5461 slots) master
1 additional replica(s)
S: f6a6957421b80409106cb36be3c7ba41f3b603ff 192.168.163.132:6384
slots: (0 slots) slave
replicates 117457eab5071954faab5e81c3170600d5192270
[OK] All nodes agree about slots configuration.
>>> Check for
>>> Check
[OK] All 16384 slots covered.
How many slots do you want to move (from 1 to 16384)? 1
What is the receiving node ID? 815da8448f5d5a304df0353ca10d8f9b77016b28
Please enter all the source node IDs.
Type 'all' to use all the nodes as source nodes for the hash slots.
Type 'done' once you entered all the source nodes IDs.
Source node #1: 117457eab5071954faab5e81c3170600d5192270
Source node #2: done
Ready to move 1 slots.
Source nodes:
M: 117457eab5071954faab5e81c3170600d5192270 192.168.163.132:6379
slots:[0-5460] (5461 slots) master
1 additional replica(s)
Destination node:
M: 815da8448f5d5a304df0353ca10d8f9b77016b28 192.168.163.132:6380
slots:[5461-10922] (5462 slots) master
1 additional replica(s)
Resharding plan:
Moving slot 0 from 117457eab5071954faab5e81c3170600d5192270
Do you want to proceed with the proposed reshard plan (yes/no)? yes
Moving slot 0 from 192.168.163.132:6379 to 192.168.163.132:6380:
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⼆是根据参数进⾏操作：
redis-cli -a cc --cluster reshard 192.168.163.132:6379 --cluster-from 117457eab5071954faab5e81c3170600d5192270 --cluster-to 815da8448f5d5a304df0353ca10d8f9b77016b28 --cluster-slots 10 --cluster-yes --cluster-timeout 5000 --cluster-pipeline 说明：连接到集的任意⼀节点来对指定节点指定数量的slot进⾏迁移到指定的节点。
>>> Performing Cluster Check (using node 192.168.163.132:6379)
M: 117457eab5071954faab5e81c3170600d5192270 192.168.163.132:6379
slots:[11-5460] (5450 slots) master
1 additional replica(s)
M: 815da8448f5d5a304df0353ca10d8f9b77016b28 192.168.163.132:6380
slots:[0-10],[5461-10922] (5473 slots) master
1 additional replica(s)
S: 0c21b6cee354594a23f4d5abf0d01b48bdc96d55 192.168.163.132:6383
slots: (0 slots) slave
replicates 56005b9413cbf225783906307a2631109e753f8f
S: 3a1d04983ab6c4ae853f9602dd922d4ebadc4dbf 192.168.163.132:6382
slots: (0 slots) slave
replicates 815da8448f5d5a304df0353ca10d8f9b77016b28
M: 56005b9413cbf225783906307a2631109e753f8f 192.168.163.132:6381
slots:[10923-16383] (5461 slots) master
1 additional replica(s)
S: f6a6957421b80409106cb36be3c7ba41f3b603ff 192.168.163.132:6384
slots: (0 slots) slave
replicates 117457eab5071954faab5e81c3170600d5192270
[OK] All nodes agree about slots configuration.
>>> Check for
>>> Check
[OK] All 16384 slots covered.
Ready to move 10 slots.
Source nodes:
M: 117457eab5071954faab5e81c3170600d5192270 192.168.163.132:6379
slots:[11-5460] (5450 slots) master
1 additional replica(s)
Destination node:
M: 815da8448f5d5a304df0353ca10d8f9b77016b28 192.168.163.132:6380
slots:[0-10],[5461-10922] (5473 slots) master
1 additional replica(s)
Resharding plan:
Moving slot 11 from 117457eab5071954faab5e81c3170600d5192270
Moving slot 12 from 117457eab5071954faab5e81c3170600d5192270
拖曳声纳
Moving slot 13 from 117457eab5071954faab5e81c3170600d5192270
Moving slot 14 from 117457eab5071954faab5e81c3170600d5192270
Moving slot 15 from 117457eab5071954faab5e81c3170600d5192270
Moving slot 16 from 117457eab5071954faab5e81c3170600d5192270
Moving slot 17 from 117457eab5071954faab5e81c3170600d5192270
Moving slot 18 from 117457eab5071954faab5e81c3170600d5192270
Moving slot 19 from 117457eab5071954faab5e81c3170600d5192270
Moving slot 20 from 117457eab5071954faab5e81c3170600d5192270
Moving slot 11 from 192.168.163.132:6379 to 192.168.163.132:6380:
Moving slot 12 from 192.168.163.132:6379 to 192.168.163.132:6380:
Moving slot 13 from 192.168.163.132:6379 to 192.168.163.132:6380:
Moving slot 14 from 192.168.163.132:6379 to 192.168.163.132:6380:
Moving slot 15 from 192.168.163.132:6379 to 192.168.163.132:6380:
Moving slot 16 from 192.168.163.132:6379 to 192.168.163.132:6380:
Moving slot 17 from 192.168.163.132:6379 to 192.168.163.132:6380:
Moving slot 18 from 192.168.163.132:6379 to 192.168.163.132:6380:
Moving slot 19 from 192.168.163.132:6379 to 192.168.163.132:6380:
Moving slot 20 from 192.168.163.132:6379 to 192.168.163.132:6380:
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②平衡（rebalance）slot ：
1）平衡集中各个节点的slot数量
redis-cli -a cc --cluster rebalance 192.168.163.132:6379
>>> Performing Cluster Check (using node 192.168.163.132:6379)
[OK] All nodes agree about slots configuration.
>>> Check for
>>> Check
[OK] All 16384 slots covered.
>>> Rebalancing across 3 nodes. Total weight = 3.00
Moving 522 slots from 192.168.163.132:6380 to 192.168.163.132:6379
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>## Moving 500 slots from 192.168.163.132:6380 to 192.168.163.132:6381数据存储安全检测
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>## View Code2）根据集中各个节点设置的权重等平衡slot数量（不执⾏，只模拟）
redis-cli -a cc --cluster rebalance --cluster-weight 117457eab5071954faab5e81c3170600d5192270=5 815da8448f5d5a304df0353ca10d8f9b77016b28=4 56005b9413cbf225783906307a2631109e753f8f=3 --cluster-simulate 192.168.163.132
③导⼊集
redis-cli --cluster import 192.168.163.132:6379 --cluster-from 192.168.163.132:9021 --cluster-replace
说明：外部Redis实例（9021）导⼊到集中的任意⼀节点。
>>> Importing data from 192.168.163.132:9021 to cluster 192.168.163.132:6379
>>> Performing Cluster Check (using node 192.168.163.132:6379)
M: 117457eab5071954faab5e81c3170600d5192270 192.168.163.132:6379
slots:[1366-5961],[11423-12287] (5461 slots) master
1 additional replica(s)
M: 815da8448f5d5a304df0353ca10d8f9b77016b28 192.168.163.132:6380
slots:[1365],[5962-11422] (5462 slots) master
1 additional replica(s)
S: 0c21b6cee354594a23f4d5abf0d01b48bdc96d55 192.168.163.132:6383
slots: (0 slots) slave
replicates 56005b9413cbf225783906307a2631109e753f8f
S: 3a1d04983ab6c4ae853f9602dd922d4ebadc4dbf 192.168.163.132:6382
slots: (0 slots) slave
replicates 815da8448f5d5a304df0353ca10d8f9b77016b28
M: 56005b9413cbf225783906307a2631109e753f8f 192.168.163.132:6381
slots:[0-1364],[12288-16383] (5461 slots) master
1 additional replica(s)
S: f6a6957421b80409106cb36be3c7ba41f3b603ff 192.168.163.132:6384
slots: (0 slots) slave
replicates 117457eab5071954faab5e81c3170600d5192270
[OK] All nodes agree about slots configuration.
>>> Check for
>>> Check
[OK] All 16384 slots covered.
*** Importing 97847 keys from DB 0
Migrating 9223372011174675807 to 192.168.163.132:6381: OK
Migrating 9223372033047675807 to 192.168.163.132:6381: OK
...
...
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注意：测试下来发现参数--cluster-replace没有⽤，如果集中已经包含了某个key，在导⼊的时候会失败，不会覆盖，只有清空集key才能导⼊。
*** Importing 97847 keys from DB 0
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