Redis Cluster添加、删除的完整操作步骤

2023-09-24 11:44:05 231

前言

最近学习了Redis，发现Redis还是挺好玩的，今天测试了集群的添加、删除节点、重分配slot等。更深入的理解redis的游戏规则。步骤繁多，但是详细，话不多说了，来一起看看详细的介绍吧。

环境解释：

我是在一台Centos6.9上测试的，各个redis节点以端口号区分。文中针对各个redis，我只是以端口号代表。

~~~~MasterNode~~~~~
172.16.32.116:7000
172.16.32.116:7001
172.16.32.116:7002
~~~~SlaveNode~~~~~
172.16.32.116:8000
172.16.32.116:8001
172.16.32.116:8002
~~~~用来折腾的Node~~~~~
172.16.32.116:9000
172.16.32.116:9001

1.创建redis集群

注：更多redis集群创建，请参阅

RedisCluster集群部署搭建

#./redis-trib.rbcreate--replicas1172.16.32.116:7000172.16.32.116:7001172.16.32.116:7002172.16.32.116:8000172.16.32.116:8001172.16.32.116:8002
>>>Creatingcluster
>>>Performinghashslotsallocationon6nodes...
Using3masters:
172.16.32.116:7000
172.16.32.116:7001
172.16.32.116:7002
Addingreplica172.16.32.116:8000to172.16.32.116:7000
Addingreplica172.16.32.116:8001to172.16.32.116:7001
Addingreplica172.16.32.116:8002to172.16.32.116:7002
M:a0b91f48e933c1f1d427c54917ce970bd25d29f8172.16.32.116:7000
slots:0-5460(5461slots)master
M:273107e5ac994d675749be0979556e761274bb93172.16.32.116:7001
slots:5461-10922(5462slots)master
M:88fe075375295b59eabe69fa1438ed7c7c314f43172.16.32.116:7002
slots:10923-16383(5461slots)master
S:aeb684429d220c0fd1392574d193cc1ae7577782172.16.32.116:8000
replicatesa0b91f48e933c1f1d427c54917ce970bd25d29f8
S:a96cad95dca2a8e1e0302bff4f835260d92e3d31172.16.32.116:8001
replicates273107e5ac994d675749be0979556e761274bb93
S:3d27f60a1cc4d9c8f09aca928b03f0e083722d3b172.16.32.116:8002
replicates88fe075375295b59eabe69fa1438ed7c7c314f43
CanIsettheaboveconfiguration?(type'yes'toaccept):yes
>>>Nodesconfigurationupdated
>>>Assignadifferentconfigepochtoeachnode
>>>SendingCLUSTERMEETmessagestojointhecluster
Waitingfortheclustertojoin...
>>>PerformingClusterCheck(usingnode172.16.32.116:7000)
M:a0b91f48e933c1f1d427c54917ce970bd25d29f8172.16.32.116:7000
slots:0-5460(5461slots)master
M:273107e5ac994d675749be0979556e761274bb93172.16.32.116:7001
slots:5461-10922(5462slots)master
M:88fe075375295b59eabe69fa1438ed7c7c314f43172.16.32.116:7002
slots:10923-16383(5461slots)master
M:aeb684429d220c0fd1392574d193cc1ae7577782172.16.32.116:8000
slots:(0slots)master
replicatesa0b91f48e933c1f1d427c54917ce970bd25d29f8
M:a96cad95dca2a8e1e0302bff4f835260d92e3d31172.16.32.116:8001
slots:(0slots)master
replicates273107e5ac994d675749be0979556e761274bb93
M:3d27f60a1cc4d9c8f09aca928b03f0e083722d3b172.16.32.116:8002
slots:(0slots)master
replicates88fe075375295b59eabe69fa1438ed7c7c314f43
[OK]Allnodesagreeaboutslotsconfiguration.
>>>Checkforopenslots...
>>>Checkslotscoverage...
[OK]All16384slotscovered.

2.检查集群状态

#./redis-trib.rbcheck172.16.32.116:7000
>>>PerformingClusterCheck(usingnode172.16.32.116:7000)
M:a0b91f48e933c1f1d427c54917ce970bd25d29f8172.16.32.116:7000
slots:0-5460(5461slots)master
1additionalreplica(s)
M:88fe075375295b59eabe69fa1438ed7c7c314f43172.16.32.116:7002
slots:10923-16383(5461slots)master
1additionalreplica(s)
M:273107e5ac994d675749be0979556e761274bb93172.16.32.116:7001
slots:5461-10922(5462slots)master
1additionalreplica(s)
S:3d27f60a1cc4d9c8f09aca928b03f0e083722d3b172.16.32.116:8002
slots:(0slots)slave
replicates88fe075375295b59eabe69fa1438ed7c7c314f43
S:a96cad95dca2a8e1e0302bff4f835260d92e3d31172.16.32.116:8001
slots:(0slots)slave
replicates273107e5ac994d675749be0979556e761274bb93
S:aeb684429d220c0fd1392574d193cc1ae7577782172.16.32.116:8000
slots:(0slots)slave
replicatesa0b91f48e933c1f1d427c54917ce970bd25d29f8
[OK]Allnodesagreeaboutslotsconfiguration.
>>>Checkforopenslots...
>>>Checkslotscoverage...
[OK]All16384slotscovered.

~~~~~~~~~~~~~~~~~~~~~~~~~~~添加节点~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

3.添加新节点redis-trib.rbadd-node新增节点名原集群节点名

#./redis-trib.rbadd-node172.16.32.116:9000172.16.32.116:7000
>>>Addingnode172.16.32.116:9000tocluster172.16.32.116:7000
>>>PerformingClusterCheck(usingnode172.16.32.116:7000)
M:a0b91f48e933c1f1d427c54917ce970bd25d29f8172.16.32.116:7000
slots:0-5460(5461slots)master
1additionalreplica(s)
M:88fe075375295b59eabe69fa1438ed7c7c314f43172.16.32.116:7002
slots:10923-16383(5461slots)master
1additionalreplica(s)
M:273107e5ac994d675749be0979556e761274bb93172.16.32.116:7001
slots:5461-10922(5462slots)master
1additionalreplica(s)
S:3d27f60a1cc4d9c8f09aca928b03f0e083722d3b172.16.32.116:8002
slots:(0slots)slave
replicates88fe075375295b59eabe69fa1438ed7c7c314f43
S:a96cad95dca2a8e1e0302bff4f835260d92e3d31172.16.32.116:8001
slots:(0slots)slave
replicates273107e5ac994d675749be0979556e761274bb93
S:aeb684429d220c0fd1392574d193cc1ae7577782172.16.32.116:8000
slots:(0slots)slave
replicatesa0b91f48e933c1f1d427c54917ce970bd25d29f8
[OK]Allnodesagreeaboutslotsconfiguration.
>>>Checkforopenslots...
>>>Checkslotscoverage...

4.查看当前集群状态，9000是一个空的Master

#./redis-cli-p9000clusternodes
a0b91f48e933c1f1d427c54917ce970bd25d29f8172.16.32.116:7000master-015053212547671connected0-5460
273107e5ac994d675749be0979556e761274bb93172.16.32.116:7001master-015053212507592connected5461-10922
88fe075375295b59eabe69fa1438ed7c7c314f43172.16.32.116:7002master-015053212517613connected10923-16383
3d27f60a1cc4d9c8f09aca928b03f0e083722d3b172.16.32.116:8002slave88fe075375295b59eabe69fa1438ed7c7c314f43015053212557693connected
aeb684429d220c0fd1392574d193cc1ae7577782172.16.32.116:8000slavea0b91f48e933c1f1d427c54917ce970bd25d29f8015053212537651connected
a96cad95dca2a8e1e0302bff4f835260d92e3d31172.16.32.116:8001slave273107e5ac994d675749be0979556e761274bb93015053212567712connected

5.为9000分配slot，redis的solt是固定的，就16384个，只能从其他节点获取slot，然后分配到9000

#./redis-trib.rbreshard172.16.32.116:9000
>>>PerformingClusterCheck(usingnode172.16.32.116:9000)
M:364ae8322ab2627e25b05d45b702448c74afad10172.16.32.116:9000
slots:(0slots)master
0additionalreplica(s)
M:a0b91f48e933c1f1d427c54917ce970bd25d29f8172.16.32.116:7000
slots:0-5460(5461slots)master
1additionalreplica(s)
M:273107e5ac994d675749be0979556e761274bb93172.16.32.116:7001
slots:5461-10922(5462slots)master
1additionalreplica(s)
S:3d27f60a1cc4d9c8f09aca928b03f0e083722d3b172.16.32.116:8002
slots:(0slots)slave
replicates88fe075375295b59eabe69fa1438ed7c7c314f43
S:aeb684429d220c0fd1392574d193cc1ae7577782172.16.32.116:8000
slots:(0slots)slave
replicatesa0b91f48e933c1f1d427c54917ce970bd25d29f8
M:88fe075375295b59eabe69fa1438ed7c7c314f43172.16.32.116:7002
slots:10923-16383(5461slots)master
1additionalreplica(s)
S:a96cad95dca2a8e1e0302bff4f835260d92e3d31172.16.32.116:8001
slots:(0slots)slave
replicates273107e5ac994d675749be0979556e761274bb93
[OK]Allnodesagreeaboutslotsconfiguration.
>>>Checkforopenslots...
>>>Checkslotscoverage...
[OK]All16384slotscovered.
Howmanyslotsdoyouwanttomove(from1to16384)?
WhatisthereceivingnodeID?364ae8322ab2627e25b05d45b702448c74afad10PleaseenterallthesourcenodeIDs.
Type'all'touseallthenodesassourcenodesforthehashslots.
Type'done'onceyouenteredallthesourcenodesIDs.
Sourcenode#1:all
Readytomove300slots.
Sourcenodes:
M:a0b91f48e933c1f1d427c54917ce970bd25d29f8172.16.32.116:7000
slots:0-5460(5461slots)master
1additionalreplica(s)
M:273107e5ac994d675749be0979556e761274bb93172.16.32.116:7001
slots:5461-10922(5462slots)master
1additionalreplica(s)
M:88fe075375295b59eabe69fa1438ed7c7c314f43172.16.32.116:7002
slots:10923-16383(5461slots)master
1additionalreplica(s)
Destinationnode:
M:364ae8322ab2627e25b05d45b702448c74afad10172.16.32.116:9000
slots:(0slots)master
0additionalreplica(s)
Reshardingplan:
Movingslot5461from273107e5ac994d675749be0979556e761274bb93
Movingslot5469from273107e5ac994d675749be0979556e761274bb93
Doyouwanttoproceedwiththeproposedreshardplan(yes/no)?yes
Movingslot5461from172.16.32.116:7001to172.16.32.116:9000:

6.可以看到，9000已经分配到的slot是0-985461-556110923-11021

#./redis-cli-p9000clusternodes
a0b91f48e933c1f1d427c54917ce970bd25d29f8172.16.32.116:7000master-015053249050621connected99-5460
273107e5ac994d675749be0979556e761274bb93172.16.32.116:7001master-015053249100752connected5562-10922
364ae8322ab2627e25b05d45b702448c74afad10172.16.32.116:9000myself,master-007connected0-985461-556110923-11021
3d27f60a1cc4d9c8f09aca928b03f0e083722d3b172.16.32.116:8002slave88fe075375295b59eabe69fa1438ed7c7c314f43015053249080703connected
aeb684429d220c0fd1392574d193cc1ae7577782172.16.32.116:8000slavea0b91f48e933c1f1d427c54917ce970bd25d29f8015053249110771connected
88fe075375295b59eabe69fa1438ed7c7c314f43172.16.32.116:7002master-015053249020573connected11022-16383
a96cad95dca2a8e1e0302bff4f835260d92e3d31172.16.32.116:8001slave273107e5ac994d675749be0979556e761274bb93015053249090732connected

~~~~~~~~~~~~~~~~~~~~~~~~~~~将9000变为slave~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

7.希望将9000变成7000的slave，但是由于有slot，执行失败，需要先转移slot

#redis-cli-c-p9000clusterreplicatea0b91f48e933c1f1d427c54917ce970bd25d29f8
(error)ERRTosetamasterthenodemustbeemptyandwithoutassignedslots.

8.删除节点也是不可以的，总之，只要上面有slot。redis是不会让你删除的，而且需要人工介入，rebalance这些slot之后才行

#./redis-trib.rbdel-node172.16.32.116:9000364ae8322ab2627e25b05d45b702448c74afad10
>>>Removingnode364ae8322ab2627e25b05d45b702448c74afad10fromcluster172.16.32.116:9000
[ERR]Node172.16.32.116:9000isnotempty!Resharddataawayandtryagain.

9.重新分配9000的slot到7000上

#./redis-trib.rbreshard172.16.32.116:9000<<<<<<重新分配slot
>>>PerformingClusterCheck(usingnode172.16.32.116:9000)
M:364ae8322ab2627e25b05d45b702448c74afad10172.16.32.116:9000
slots:0-98,5461-5561,10923-11021(299slots)master
0additionalreplica(s)
M:a0b91f48e933c1f1d427c54917ce970bd25d29f8172.16.32.116:7000
slots:99-5460(5362slots)master
1additionalreplica(s)
M:273107e5ac994d675749be0979556e761274bb93172.16.32.116:7001
slots:5562-10922(5361slots)master
1additionalreplica(s)
S:3d27f60a1cc4d9c8f09aca928b03f0e083722d3b172.16.32.116:8002
slots:(0slots)slave
replicates88fe075375295b59eabe69fa1438ed7c7c314f43
S:aeb684429d220c0fd1392574d193cc1ae7577782172.16.32.116:8000
slots:(0slots)slave
replicatesa0b91f48e933c1f1d427c54917ce970bd25d29f8
M:88fe075375295b59eabe69fa1438ed7c7c314f43172.16.32.116:7002
slots:11022-16383(5362slots)master
1additionalreplica(s)
S:a96cad95dca2a8e1e0302bff4f835260d92e3d31172.16.32.116:8001
slots:(0slots)slave
replicates273107e5ac994d675749be0979556e761274bb93
[OK]Allnodesagreeaboutslotsconfiguration.
>>>Checkforopenslots...
>>>Checkslotscoverage...
[OK]All16384slotscovered.
Howmanyslotsdoyouwanttomove(from1to16384)?300<<<9000节点全部需要迁移的节点
WhatisthereceivingnodeID?a0b91f48e933c1f1d427c54917ce970bd25d29f8<<<<<<7000的ID
PleaseenterallthesourcenodeIDs.
Type'all'touseallthenodesassourcenodesforthehashslots.
Type'done'onceyouenteredallthesourcenodesIDs.
Sourcenode#1:364ae8322ab2627e25b05d45b702448c74afad10<<<<<<9000的ID
Sourcenode#2:done
Readytomove300slots.
Sourcenodes:
M:364ae8322ab2627e25b05d45b702448c74afad10172.16.32.116:9000<<<<<
10.查询，可以看到9000已经没有slot了
#./redis-cli-p9000clusternodes
a0b91f48e933c1f1d427c54917ce970bd25d29f8172.16.32.116:7000master-015053289380568connected0-556110923-11021
273107e5ac994d675749be0979556e761274bb93172.16.32.116:7001master-015053289390592connected5562-10922
364ae8322ab2627e25b05d45b702448c74afad10172.16.32.116:9000myself,master-007connected
3d27f60a1cc4d9c8f09aca928b03f0e083722d3b172.16.32.116:8002slave88fe075375295b59eabe69fa1438ed7c7c314f43015053289360533connected
aeb684429d220c0fd1392574d193cc1ae7577782172.16.32.116:8000slavea0b91f48e933c1f1d427c54917ce970bd25d29f8015053289330468connected
88fe075375295b59eabe69fa1438ed7c7c314f43172.16.32.116:7002master-015053289370543connected11022-16383
a96cad95dca2a8e1e0302bff4f835260d92e3d31172.16.32.116:8001slave273107e5ac994d675749be0979556e761274bb93015053289340492connected
11.再次执行命令，将9000变成7000的slave，成功
#redis-cli-c-p9000clusterreplicatea0b91f48e933c1f1d427c54917ce970bd25d29f8
OK
12.查看状态,9000已经成为7000的slave
#./redis-cli-p9000clusternodes
a0b91f48e933c1f1d427c54917ce970bd25d29f8172.16.32.116:7000master-015053295642868connected0-556110923-11021
273107e5ac994d675749be0979556e761274bb93172.16.32.116:7001master-015053295612812connected5562-10922
364ae8322ab2627e25b05d45b702448c74afad10172.16.32.116:9000myself,slavea0b91f48e933c1f1d427c54917ce970bd25d29f8007connected<<<<<<<<<<<<<<
3d27f60a1cc4d9c8f09aca928b03f0e083722d3b172.16.32.116:8002slave88fe075375295b59eabe69fa1438ed7c7c314f43015053295582743connected
aeb684429d220c0fd1392574d193cc1ae7577782172.16.32.116:8000slavea0b91f48e933c1f1d427c54917ce970bd25d29f8015053295542668connected
88fe075375295b59eabe69fa1438ed7c7c314f43172.16.32.116:7002master-015053295632853connected11022-16383
a96cad95dca2a8e1e0302bff4f835260d92e3d31172.16.32.116:8001slave273107e5ac994d675749be0979556e761274bb93015053295622832connected
13.删除节点9000，成功删除
#./redis-trib.rbdel-node172.16.32.116:9000364ae8322ab2627e25b05d45b702448c74afad10
>>>Removingnode364ae8322ab2627e25b05d45b702448c74afad10fromcluster172.16.32.116:9000
>>>SendingCLUSTERFORGETmessagestothecluster...
>>>SHUTDOWNthenode.
14.连接9000，发现已经shutdown，无法连接
#./redis-cli-p9000clusternodes
CouldnotconnecttoRedisat127.0.0.1:9000:Connectionrefused
CouldnotconnecttoRedisat127.0.0.1:9000:Connectionrefused
15.查看集群状态，9000已经不见了
#./redis-cli-p7000clusternodes
88fe075375295b59eabe69fa1438ed7c7c314f43172.16.32.116:7002master-015053296938353connected11022-16383
273107e5ac994d675749be0979556e761274bb93172.16.32.116:7001master-015053296948372connected5562-10922
a0b91f48e933c1f1d427c54917ce970bd25d29f8172.16.32.116:7000myself,master-008connected0-556110923-11021
3d27f60a1cc4d9c8f09aca928b03f0e083722d3b172.16.32.116:8002slave88fe075375295b59eabe69fa1438ed7c7c314f43015053296968416connected
a96cad95dca2a8e1e0302bff4f835260d92e3d31172.16.32.116:8001slave273107e5ac994d675749be0979556e761274bb93015053296958405connected
aeb684429d220c0fd1392574d193cc1ae7577782172.16.32.116:8000slavea0b91f48e933c1f1d427c54917ce970bd25d29f8015053296928338connected
~~~~~~~~~~~~~~~~~~~~~~~~~~~再次启动9000，发现不同~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


16.再次启动9000，发现一个有意思的事情。上面检查7000，集群已经没有9000了
#./redis-cli-p7000clusternodes
88fe075375295b59eabe69fa1438ed7c7c314f43172.16.32.116:7002master-015053298982413connected11022-16383
273107e5ac994d675749be0979556e761274bb93172.16.32.116:7001master-015053298992422connected5562-10922
a0b91f48e933c1f1d427c54917ce970bd25d29f8172.16.32.116:7000myself,master-008connected0-556110923-11021
3d27f60a1cc4d9c8f09aca928b03f0e083722d3b172.16.32.116:8002slave88fe075375295b59eabe69fa1438ed7c7c314f43015053299022496connected
a96cad95dca2a8e1e0302bff4f835260d92e3d31172.16.32.116:8001slave273107e5ac994d675749be0979556e761274bb93015053299012465connected
aeb684429d220c0fd1392574d193cc1ae7577782172.16.32.116:8000slavea0b91f48e933c1f1d427c54917ce970bd25d29f8015053299002448connected
17.但是查看9000，确仍然能看到整个集群的信息。
说明，在删除节点的过程，只是在原有集群中删除9000的信息。但是9000自身的信息并没有被删除，依然保留全部的信息，只是9000实例被关闭而已。
#./redis-cli-p9000clusternodes
a0b91f48e933c1f1d427c54917ce970bd25d29f8172.16.32.116:7000master-015053299020038connected0-556110923-11021
273107e5ac994d675749be0979556e761274bb93172.16.32.116:7001master-015053299030062connected5562-10922
3d27f60a1cc4d9c8f09aca928b03f0e083722d3b172.16.32.116:8002slave88fe075375295b59eabe69fa1438ed7c7c314f43015053299060133connected
a96cad95dca2a8e1e0302bff4f835260d92e3d31172.16.32.116:8001slave273107e5ac994d675749be0979556e761274bb93015053299080192connected
aeb684429d220c0fd1392574d193cc1ae7577782172.16.32.116:8000slavea0b91f48e933c1f1d427c54917ce970bd25d29f8015053299040088connected
364ae8322ab2627e25b05d45b702448c74afad10172.16.32.116:9000myself,slavea0b91f48e933c1f1d427c54917ce970bd25d29f8007connected
88fe075375295b59eabe69fa1438ed7c7c314f43172.16.32.116:7002master-015053299070163connected11022-16383
18.而9000的全部信息，是记录在自身目录的nodes.conf中
#morenodes.conf
a0b91f48e933c1f1d427c54917ce970bd25d29f8172.16.32.116:7000master-015053295442448connected0-556110923-11021
273107e5ac994d675749be0979556e761274bb93172.16.32.116:7001master-015053295422412connected5562-10922
364ae8322ab2627e25b05d45b702448c74afad10172.16.32.116:9000myself,slavea0b91f48e933c1f1d427c54917ce970bd25d29f8007connected
3d27f60a1cc4d9c8f09aca928b03f0e083722d3b172.16.32.116:8002slave88fe075375295b59eabe69fa1438ed7c7c314f43015053295412393connected
aeb684429d220c0fd1392574d193cc1ae7577782172.16.32.116:8000slavea0b91f48e933c1f1d427c54917ce970bd25d29f8015053295452468connected
88fe075375295b59eabe69fa1438ed7c7c314f43172.16.32.116:7002master-015053295432423connected11022-16383
a96cad95dca2a8e1e0302bff4f835260d92e3d31172.16.32.116:8001slave273107e5ac994d675749be0979556e761274bb93015053295462482connected
varscurrentEpoch8lastVoteEpoch0
19.到7001等其他节点中查看，nodes.conf已经没有9000的信息
#morenodes.conf
273107e5ac994d675749be0979556e761274bb93172.16.32.116:7001myself,master-002connected5562-10922
a0b91f48e933c1f1d427c54917ce970bd25d29f8172.16.32.116:7000master-015053296803128connected0-556110923-11021
aeb684429d220c0fd1392574d193cc1ae7577782172.16.32.116:8000slavea0b91f48e933c1f1d427c54917ce970bd25d29f8015053296843198connected
3d27f60a1cc4d9c8f09aca928b03f0e083722d3b172.16.32.116:8002slave88fe075375295b59eabe69fa1438ed7c7c314f43015053296863216connected
a96cad95dca2a8e1e0302bff4f835260d92e3d31172.16.32.116:8001slave273107e5ac994d675749be0979556e761274bb93015053296853185connected
88fe075375295b59eabe69fa1438ed7c7c314f43172.16.32.116:7002master-015053296833173connected11022-16383
varscurrentEpoch8lastVoteEpoch0
~~~~~~~~~~~~~~~~~~~~~~~~~~~再次添加9000，以及9001~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


20.将9000和9001再次加入集群，开始下面的折腾。


注意：需要将9000和9001下的redis.conf外的文件清除，重启。然后才能再次加入集群。不然会遇到错误：
[ERR]Node172.16.32.116:9001isnotempty.Eitherthenodealreadyknowsothernodes(checkwithCLUSTERNODES)orcontainssomekeyindatabase0.
21.加入集群
./redis-trib.rbadd-node172.16.32.116:9000172.16.32.116:7002
./redis-trib.rbadd-node172.16.32.116:9001172.16.32.116:7002
22.现在是两个空的Master节点
#./redis-trib.rbcheck172.16.32.116:9001
>>>PerformingClusterCheck(usingnode172.16.32.116:9001)
M:c4ba7a1f537ac66076791461d6af9012741fee74172.16.32.116:9001
slots:(0slots)master
0additionalreplica(s)
M:dbf78b73f2ab9e37cbf31abbc2beb3d5413d5516172.16.32.116:9000
slots:(0slots)master
0additionalreplica(s)

[OK]Allnodesagreeaboutslotsconfiguration.
>>>Checkforopenslots...
>>>Checkslotscoverage...
[OK]All16384slotscovered.
23.重分配100个slot到9000上，其实redis很聪明的，我连接的是9001，但是在分配的时候，它会问你，receivingnode是谁，Sourcenode是谁。
#./redis-trib.rbreshard172.16.32.116:9001
>>>PerformingClusterCheck(usingnode172.16.32.116:9001)
......
[OK]Allnodesagreeaboutslotsconfiguration.
>>>Checkforopenslots...
>>>Checkslotscoverage...
[OK]All16384slotscovered.
Howmanyslotsdoyouwanttomove(from1to16384)?100
WhatisthereceivingnodeID?dbf78b73f2ab9e37cbf31abbc2beb3d5413d5516<<<<<<<<
24.查看分配情况，redis还是很聪明灵活的。
#redis-cli-p7001clusternodes
273107e5ac994d675749be0979556e761274bb93172.16.32.116:7001myself,master-002connected5662-10922
a0b91f48e933c1f1d427c54917ce970bd25d29f8172.16.32.116:7000master-015053308566058connected0-556110923-11021
aeb684429d220c0fd1392574d193cc1ae7577782172.16.32.116:8000slavea0b91f48e933c1f1d427c54917ce970bd25d29f8015053308535988connected
3d27f60a1cc4d9c8f09aca928b03f0e083722d3b172.16.32.116:8002slave88fe075375295b59eabe69fa1438ed7c7c314f43015053308606116connected
a96cad95dca2a8e1e0302bff4f835260d92e3d31172.16.32.116:8001slave273107e5ac994d675749be0979556e761274bb93015053308596085connected
c4ba7a1f537ac66076791461d6af9012741fee74172.16.32.116:9001master-015053308626159connected<<<<<<<<<<<<<<<<<<<<<依然是空的
88fe075375295b59eabe69fa1438ed7c7c314f43172.16.32.116:7002master-015053308616123connected11022-16383
dbf78b73f2ab9e37cbf31abbc2beb3d5413d5516172.16.32.116:9000master-0150533085860710connected5562-5661<<<<<<<<<<<<<<<<<<<<<从7001要来100个slot
25.将9001添加为9000的slave节点redis-cli-pclusternodes
#redis-cli-p9001clusternodesdbf78b73f2ab9e37cbf31abbc2beb3d5413d5516
273107e5ac994d675749be0979556e761274bb93172.16.32.116:7001myself,master-002connected5662-10922
a0b91f48e933c1f1d427c54917ce970bd25d29f8172.16.32.116:7000master-015053314577988connected0-556110923-11021
aeb684429d220c0fd1392574d193cc1ae7577782172.16.32.116:8000slavea0b91f48e933c1f1d427c54917ce970bd25d29f8015053314547918connected
3d27f60a1cc4d9c8f09aca928b03f0e083722d3b172.16.32.116:8002slave88fe075375295b59eabe69fa1438ed7c7c314f43015053314567956connected
a96cad95dca2a8e1e0302bff4f835260d92e3d31172.16.32.116:8001slave273107e5ac994d675749be0979556e761274bb930150533145879910connected
c4ba7a1f537ac66076791461d6af9012741fee74172.16.32.116:9001slavedbf78b73f2ab9e37cbf31abbc2beb3d5413d55160150533145980110connected
88fe075375295b59eabe69fa1438ed7c7c314f43172.16.32.116:7002master-015053314557933connected11022-16383
dbf78b73f2ab9e37cbf31abbc2beb3d5413d5516172.16.32.116:9000master-0150533145378810connected5562-5661
经过各种折腾，redis添加，删除，重分配slot等操作，都测试完了。


中间有很多命令输出部门，视乎有点重复。但是为了更好的阅读理解，观察每一步操作的变化。后面查阅也更容易一些。

毕竟，年纪大了，记性不好。好多自己写过的blog，回头翻阅的时候，发现某些步骤，不是很好理解了。虽然我的blog，都是基于自己测试的结果，但是依然会忘记。
总结
以上就是这篇文章的全部内容了，希望本文的内容对大家的学习或者工作能带来一定的帮助，如果有疑问大家可以留言交流，谢谢大家对毛票票的支持。

Redis Cluster添加、删除的完整操作步骤

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