• docker 部署Redis集群（三主三从，以及扩容、缩容）

    1：创建6个redis容器

    1. docker run -d --name redis01 --net host --privileged=true -v /opt/redis/redis01:/data redis:6.0.8 --cluster-enabled yes --appendonly yes --port 6381
    2. docker run -d --name redis02 --net host --privileged=true -v /opt/redis/redis02:/data redis:6.0.8 --cluster-enabled yes --appendonly yes --port 6382
    3. docker run -d --name redis03 --net host --privileged=true -v /opt/redis/redis03:/data redis:6.0.8 --cluster-enabled yes --appendonly yes --port 6383
    4. docker run -d --name redis04 --net host --privileged=true -v /opt/redis/redis04:/data redis:6.0.8 --cluster-enabled yes --appendonly yes --port 6384
    5. docker run -d --name redis05 --net host --privileged=true -v /opt/redis/redis05:/data redis:6.0.8 --cluster-enabled yes --appendonly yes --port 6385
    6. docker run -d --name redis06 --net host --privileged=true -v /opt/redis/redis06:/data redis:6.0.8 --cluster-enabled yes --appendonly yes --port 6386

    2：查看容器运行状态

    1. [root@localhost redis]# docker ps 
    2. CONTAINER ID   IMAGE         COMMAND                  CREATED          STATUS          PORTS     NAMES
    3. 2230e0a5bf5c   redis:6.0.8   "docker-entrypoint.s…"   7 seconds ago    Up 6 seconds              redis06
    4. 0bc9f5da8601   redis:6.0.8   "docker-entrypoint.s…"   9 seconds ago    Up 8 seconds              redis05
    5. e1431fb85072   redis:6.0.8   "docker-entrypoint.s…"   9 seconds ago    Up 8 seconds              redis04
    6. 01c2ff5e0090   redis:6.0.8   "docker-entrypoint.s…"   9 seconds ago    Up 8 seconds              redis03
    7. 88892f9eb9db   redis:6.0.8   "docker-entrypoint.s…"   9 seconds ago    Up 9 seconds              redis02
    8. a13bfc991867   redis:6.0.8   "docker-entrypoint.s…"   44 seconds ago   Up 43 seconds             redis01

    3：创建redis 3主3从集群

    1. [root@localhost ~]# docker exec -it redis01 /bin/bash
    2.  
    3. --cluster-replicas 1 表示为每个master，创建一个slave节点
    4. root@localhost:/data# redis-cli --cluster create 192.168.1.31:6381 192.168.1.31:6382 192.168.1.31:6383 192.168.1.31:6384 192.168.1.31:6385 192.168.1.31:6386 --cluster-replicas 1
    5. >>> Performing hash slots allocation on 6 nodes...
    6. Master[0] -> Slots 0 - 5460
    7. Master[1] -> Slots 5461 - 10922
    8. Master[2] -> Slots 10923 - 16383
    9. Adding replica 192.168.1.31:6385 to 192.168.1.31:6381
    10. Adding replica 192.168.1.31:6386 to 192.168.1.31:6382
    11. Adding replica 192.168.1.31:6384 to 192.168.1.31:6383
    12. >>> Trying to optimize slaves allocation for anti-affinity
    13. [WARNING] Some slaves are in the same host as their master
    14. M: cd9a9149593770a920258bf75e1235ca4b904cd5 192.168.1.31:6381
    15.    slots:[0-5460] (5461 slots) master
    16. M: 89228357317c6b7d6850fffa2f0819085def1a2f 192.168.1.31:6382
    17.    slots:[5461-10922] (5462 slots) master
    18. M: c2436c65625e1d74d8ea5bde328df04699d494e9 192.168.1.31:6383
    19.    slots:[10923-16383] (5461 slots) master
    20. S: eac210d52a6c6ddeb9556ffa1820d13a89828264 192.168.1.31:6384
    21.    replicates 89228357317c6b7d6850fffa2f0819085def1a2f
    22. S: d8f0436ada2c423bc07d8cba38461eb3bb00ca3a 192.168.1.31:6385
    23.    replicates c2436c65625e1d74d8ea5bde328df04699d494e9
    24. S: 5b40728c470dac59556f7b51866e590e9038bbd9 192.168.1.31:6386
    25.    replicates cd9a9149593770a920258bf75e1235ca4b904cd5
    26. Can I set the above configuration? (type 'yes' to accept): yes
    27. >>> Nodes configuration updated
    28. >>> Assign a different config epoch to each node
    29. >>> Sending CLUSTER MEET messages to join the cluster
    30. Waiting for the cluster to join
    31. .
    32. >>> Performing Cluster Check (using node 192.168.1.31:6381)
    33. M: cd9a9149593770a920258bf75e1235ca4b904cd5 192.168.1.31:6381
    34.    slots:[0-5460] (5461 slots) master
    35.    1 additional replica(s)
    36. S: eac210d52a6c6ddeb9556ffa1820d13a89828264 192.168.1.31:6384
    37.    slots: (0 slots) slave
    38.    replicates 89228357317c6b7d6850fffa2f0819085def1a2f
    39. M: 89228357317c6b7d6850fffa2f0819085def1a2f 192.168.1.31:6382
    40.    slots:[5461-10922] (5462 slots) master
    41.    1 additional replica(s)
    42. S: 5b40728c470dac59556f7b51866e590e9038bbd9 192.168.1.31:6386
    43.    slots: (0 slots) slave
    44.    replicates cd9a9149593770a920258bf75e1235ca4b904cd5
    45. S: d8f0436ada2c423bc07d8cba38461eb3bb00ca3a 192.168.1.31:6385
    46.    slots: (0 slots) slave
    47.    replicates c2436c65625e1d74d8ea5bde328df04699d494e9
    48. M: c2436c65625e1d74d8ea5bde328df04699d494e9 192.168.1.31:6383
    49.    slots:[10923-16383] (5461 slots) master
    50.    1 additional replica(s)
    51. [OK] All nodes agree about slots configuration.
    52. >>> Check for open slots...
    53. >>> Check slots coverage...
    54. [OK] All 16384 slots covered.

    4：查看集群状态

    1. root@localhost:/data# redis-cli -p 6381
    2. 127.0.0.1:6381> keys *
    3. (empty array)
    4. 127.0.0.1:6381> cluster info
    5. cluster_state:ok
    6. cluster_slots_assigned:16384
    7. cluster_slots_ok:16384
    8. cluster_slots_pfail:0
    9. cluster_slots_fail:0
    10. cluster_known_nodes:6
    11. cluster_size:3
    12. cluster_current_epoch:6
    13. cluster_my_epoch:1
    14. cluster_stats_messages_ping_sent:300
    15. cluster_stats_messages_pong_sent:310
    16. cluster_stats_messages_sent:610
    17. cluster_stats_messages_ping_received:305
    18. cluster_stats_messages_pong_received:300
    19. cluster_stats_messages_meet_received:5
    20. cluster_stats_messages_received:610
    21.  
    22. 127.0.0.1:6381> cluster nodes
    23. cd9a9149593770a920258bf75e1235ca4b904cd5 192.168.1.31:6381@16381 myself,master - 0 1700124241000 1 connected 0-5460
    24. eac210d52a6c6ddeb9556ffa1820d13a89828264 192.168.1.31:6384@16384 slave 89228357317c6b7d6850fffa2f0819085def1a2f 0 1700124242176 2 connected
    25. 89228357317c6b7d6850fffa2f0819085def1a2f 192.168.1.31:6382@16382 master - 0 1700124242000 2 connected 5461-10922
    26. 5b40728c470dac59556f7b51866e590e9038bbd9 192.168.1.31:6386@16386 slave cd9a9149593770a920258bf75e1235ca4b904cd5 0 1700124240000 1 connected
    27. d8f0436ada2c423bc07d8cba38461eb3bb00ca3a 192.168.1.31:6385@16385 slave c2436c65625e1d74d8ea5bde328df04699d494e9 0 1700124239000 3 connected
    28. c2436c65625e1d74d8ea5bde328df04699d494e9 192.168.1.31:6383@16383 master - 0 1700124241149 3 connected 10923-16383
    29.  
    30. 可以看出主从关系如下：
    31. 192.168.1.31:6381 -> 192.168.1.31:6386
    32. 192.168.1.31:6382 -> 192.168.1.31:6384
    33. 192.168.1.31:6383 -> 192.168.1.31:6385

    5：存储数据，必须连接redis集群，不能连接单节点

    1. root@localhost:/data# redis-cli -p 6381 -c
    2. 127.0.0.1:6381> keys *
    3. (empty array)
    4. 127.0.0.1:6381> set k1 v1
    5. (error) MOVED 12706 192.168.1.31:6383
    6. 127.0.0.1:6381> set k2 v2
    7. OK
    8. 127.0.0.1:6381> set k3 v3
    9. OK
    10. 127.0.0.1:6381> set k4 v4
    11. (error) MOVED 8455 192.168.1.31:6382
    12. 127.0.0.1:6381> 
    13.  
    14. 127.0.0.1:6381> set k1 v-cluster1
    15. -> Redirected to slot [12706] located at 192.168.1.31:6383
    16. OK
    17. 192.168.1.31:6383> set k2 v-cluster2
    18. -> Redirected to slot [449] located at 192.168.1.31:6381
    19. OK
    20. 192.168.1.31:6381> set k3 v3
    21. OK
    22. 192.168.1.31:6381> set k4 v4
    23. -> Redirected to slot [8455] located at 192.168.1.31:6382
    24. OK

    6：主从容错切换迁移
    6.1：查看集群信息

    1. root@localhost:/data# redis-cli --cluster check 192.168.1.31:6381
    2. 192.168.1.31:6381 (cd9a9149...) -> 2 keys | 5461 slots | 1 slaves.
    3. 192.168.1.31:6382 (89228357...) -> 1 keys | 5462 slots | 1 slaves.
    4. 192.168.1.31:6383 (c2436c65...) -> 1 keys | 5461 slots | 1 slaves.
    5. [OK] 4 keys in 3 masters.
    6. 0.00 keys per slot on average.
    7. >>> Performing Cluster Check (using node 192.168.1.31:6381)
    8. M: cd9a9149593770a920258bf75e1235ca4b904cd5 192.168.1.31:6381
    9.    slots:[0-5460] (5461 slots) master
    10.    1 additional replica(s)
    11. S: eac210d52a6c6ddeb9556ffa1820d13a89828264 192.168.1.31:6384
    12.    slots: (0 slots) slave
    13.    replicates 89228357317c6b7d6850fffa2f0819085def1a2f
    14. M: 89228357317c6b7d6850fffa2f0819085def1a2f 192.168.1.31:6382
    15.    slots:[5461-10922] (5462 slots) master
    16.    1 additional replica(s)
    17. S: 5b40728c470dac59556f7b51866e590e9038bbd9 192.168.1.31:6386
    18.    slots: (0 slots) slave
    19.    replicates cd9a9149593770a920258bf75e1235ca4b904cd5
    20. S: d8f0436ada2c423bc07d8cba38461eb3bb00ca3a 192.168.1.31:6385
    21.    slots: (0 slots) slave
    22.    replicates c2436c65625e1d74d8ea5bde328df04699d494e9
    23. M: c2436c65625e1d74d8ea5bde328df04699d494e9 192.168.1.31:6383
    24.    slots:[10923-16383] (5461 slots) master
    25.    1 additional replica(s)
    26. [OK] All nodes agree about slots configuration.
    27. >>> Check for open slots...
    28. >>> Check slots coverage...
    29. [OK] All 16384 slots covered.

    6.2：停止6381，redis01

    [root@localhost redis]# docker stop redis01

    6.3：查看集群状态

    1. [root@localhost redis]# docker exec -it redis02 /bin/bash
    2. root@localhost:/data# redis-cli -p 6382 -c
    3.  
    4. 查看集群状态：
    5. 127.0.0.1:6382> cluster nodes
    6. eac210d52a6c6ddeb9556ffa1820d13a89828264 192.168.1.31:6384@16384 slave 89228357317c6b7d6850fffa2f0819085def1a2f 0 1700133223366 2 connected
    7. 5b40728c470dac59556f7b51866e590e9038bbd9 192.168.1.31:6386@16386 master - 0 1700133224000 7 connected 0-5460
    8. d8f0436ada2c423bc07d8cba38461eb3bb00ca3a 192.168.1.31:6385@16385 slave c2436c65625e1d74d8ea5bde328df04699d494e9 0 1700133224388 3 connected
    9. 89228357317c6b7d6850fffa2f0819085def1a2f 192.168.1.31:6382@16382 myself,master - 0 1700133223000 2 connected 5461-10922
    10. cd9a9149593770a920258bf75e1235ca4b904cd5 192.168.1.31:6381@16381 master,fail - 1700133123340 1700133116000 1 disconnected
    11. c2436c65625e1d74d8ea5bde328df04699d494e9 192.168.1.31:6383@16383 master - 0 1700133225412 3 connected 10923-16383
    12.  
    13. 192.168.1.31:6386，成为master了，192.168.1.31:6381宕机了。
    14.  
    15.  
    16. # 可以正常查询数据
    17. 127.0.0.1:6382> get k1
    18. -> Redirected to slot [12706] located at 192.168.1.31:6383
    19. "v-cluster1"
    20. 192.168.1.31:6383> get k2
    21. -> Redirected to slot [449] located at 192.168.1.31:6386
    22. "v-cluster2"
    23. 192.168.1.31:6386> get k3
    24. "v3"
    25. 192.168.1.31:6386> get k4
    26. -> Redirected to slot [8455] located at 192.168.1.31:6382
    27. "v4"

    6.4：启动redis01

    [root@localhost redis]# docker start redis01

    6.5：查看redis 集群状况

    1. [root@localhost redis]# docker exec -it redis02 /bin/bash
    2. root@localhost:/data# redis-cli -p 6382 -c
    3. 127.0.0.1:6382> cluster nodes
    4. eac210d52a6c6ddeb9556ffa1820d13a89828264 192.168.1.31:6384@16384 slave 89228357317c6b7d6850fffa2f0819085def1a2f 0 1700134213000 2 connected
    5. 5b40728c470dac59556f7b51866e590e9038bbd9 192.168.1.31:6386@16386 master - 0 1700134213004 7 connected 0-5460
    6. d8f0436ada2c423bc07d8cba38461eb3bb00ca3a 192.168.1.31:6385@16385 slave c2436c65625e1d74d8ea5bde328df04699d494e9 0 1700134214020 3 connected
    7. 89228357317c6b7d6850fffa2f0819085def1a2f 192.168.1.31:6382@16382 myself,master - 0 1700134211000 2 connected 5461-10922
    8. cd9a9149593770a920258bf75e1235ca4b904cd5 192.168.1.31:6381@16381 slave 5b40728c470dac59556f7b51866e590e9038bbd9 0 1700134211000 7 connected
    9. c2436c65625e1d74d8ea5bde328df04699d494e9 192.168.1.31:6383@16383 master - 0 1700134212000 3 connected 10923-16383
    10.  
    11. 6381成为slave，6386是master

    6.6：恢复成原来的 6381位master，6386为slave，只需要重启redis06

    1. docker stop redis06
    2. docker start redis06

    6.7：检查集群状况

    1. root@localhost:/data# redis-cli --cluster check 192.168.1.31:6381
    2. 192.168.1.31:6381 (cd9a9149...) -> 2 keys | 5461 slots | 1 slaves.
    3. 192.168.1.31:6383 (c2436c65...) -> 1 keys | 5461 slots | 1 slaves.
    4. 192.168.1.31:6382 (89228357...) -> 1 keys | 5462 slots | 1 slaves.
    5. [OK] 4 keys in 3 masters.
    6. 0.00 keys per slot on average.
    7. >>> Performing Cluster Check (using node 192.168.1.31:6381)
    8. M: cd9a9149593770a920258bf75e1235ca4b904cd5 192.168.1.31:6381
    9.    slots:[0-5460] (5461 slots) master
    10.    1 additional replica(s)
    11. S: eac210d52a6c6ddeb9556ffa1820d13a89828264 192.168.1.31:6384
    12.    slots: (0 slots) slave
    13.    replicates 89228357317c6b7d6850fffa2f0819085def1a2f
    14. S: d8f0436ada2c423bc07d8cba38461eb3bb00ca3a 192.168.1.31:6385
    15.    slots: (0 slots) slave
    16.    replicates c2436c65625e1d74d8ea5bde328df04699d494e9
    17. S: 5b40728c470dac59556f7b51866e590e9038bbd9 192.168.1.31:6386
    18.    slots: (0 slots) slave
    19.    replicates cd9a9149593770a920258bf75e1235ca4b904cd5
    20. M: c2436c65625e1d74d8ea5bde328df04699d494e9 192.168.1.31:6383
    21.    slots:[10923-16383] (5461 slots) master
    22.    1 additional replica(s)
    23. M: 89228357317c6b7d6850fffa2f0819085def1a2f 192.168.1.31:6382
    24.    slots:[5461-10922] (5462 slots) master
    25.    1 additional replica(s)
    26. [OK] All nodes agree about slots configuration.
    27. >>> Check for open slots...
    28. >>> Check slots coverage...
    29. [OK] All 16384 slots covered.

    7：主从扩容，增加一个节点6387为master，一个节点6388为slave

    1. docker run -d --name redis07 --net host --privileged=true -v /opt/redis/redis07:/data redis:6.0.8 --cluster-enabled yes --appendonly yes --port 6387
    2. docker run -d --name redis08 --net host --privileged=true -v /opt/redis/redis08:/data redis:6.0.8 --cluster-enabled yes --appendonly yes --port 6388
    3.  
    4.  
    5. [root@localhost redis]# docker exec -it redis07 /bin/bash
    6. 将新增的6387作为master节点加入集群
    7. 6387就是将要作为master新增节点
    8. 6381就是原来集群节点里面的领导
    9. root@localhost:/data# redis-cli --cluster add-node 192.168.1.31:6387 192.168.1.31:6381
    10. >>> Adding node 192.168.1.31:6387 to cluster 192.168.1.31:6381
    11. >>> Performing Cluster Check (using node 192.168.1.31:6381)
    12. M: cd9a9149593770a920258bf75e1235ca4b904cd5 192.168.1.31:6381
    13.    slots:[0-5460] (5461 slots) master
    14.    1 additional replica(s)
    15. S: eac210d52a6c6ddeb9556ffa1820d13a89828264 192.168.1.31:6384
    16.    slots: (0 slots) slave
    17.    replicates 89228357317c6b7d6850fffa2f0819085def1a2f
    18. S: d8f0436ada2c423bc07d8cba38461eb3bb00ca3a 192.168.1.31:6385
    19.    slots: (0 slots) slave
    20.    replicates c2436c65625e1d74d8ea5bde328df04699d494e9
    21. S: 5b40728c470dac59556f7b51866e590e9038bbd9 192.168.1.31:6386
    22.    slots: (0 slots) slave
    23.    replicates cd9a9149593770a920258bf75e1235ca4b904cd5
    24. M: c2436c65625e1d74d8ea5bde328df04699d494e9 192.168.1.31:6383
    25.    slots:[10923-16383] (5461 slots) master
    26.    1 additional replica(s)
    27. M: 89228357317c6b7d6850fffa2f0819085def1a2f 192.168.1.31:6382
    28.    slots:[5461-10922] (5462 slots) master
    29.    1 additional replica(s)
    30. [OK] All nodes agree about slots configuration.
    31. >>> Check for open slots...
    32. >>> Check slots coverage...
    33. [OK] All 16384 slots covered.
    34. >>> Send CLUSTER MEET to node 192.168.1.31:6387 to make it join the cluster.
    35. [OK] New node added correctly.
    36.  
    37.  
    38. root@localhost:/data# redis-cli --cluster check 192.168.1.31:6381
    39. 192.168.1.31:6381 (cd9a9149...) -> 2 keys | 5461 slots | 1 slaves.
    40. 192.168.1.31:6387 (f32e0d73...) -> 0 keys | 0 slots | 0 slaves.
    41. 192.168.1.31:6383 (c2436c65...) -> 1 keys | 5461 slots | 1 slaves.
    42. 192.168.1.31:6382 (89228357...) -> 1 keys | 5462 slots | 1 slaves.
    43. [OK] 4 keys in 4 masters.
    44. 0.00 keys per slot on average.
    45. >>> Performing Cluster Check (using node 192.168.1.31:6381)
    46. M: cd9a9149593770a920258bf75e1235ca4b904cd5 192.168.1.31:6381
    47.    slots:[0-5460] (5461 slots) master
    48.    1 additional replica(s)
    49. M: f32e0d7320635a5873beb3594927ed6eea318976 192.168.1.31:6387
    50.    slots: (0 slots) master
    51. S: eac210d52a6c6ddeb9556ffa1820d13a89828264 192.168.1.31:6384
    52.    slots: (0 slots) slave
    53.    replicates 89228357317c6b7d6850fffa2f0819085def1a2f
    54. S: d8f0436ada2c423bc07d8cba38461eb3bb00ca3a 192.168.1.31:6385
    55.    slots: (0 slots) slave
    56.    replicates c2436c65625e1d74d8ea5bde328df04699d494e9
    57. S: 5b40728c470dac59556f7b51866e590e9038bbd9 192.168.1.31:6386
    58.    slots: (0 slots) slave
    59.    replicates cd9a9149593770a920258bf75e1235ca4b904cd5
    60. M: c2436c65625e1d74d8ea5bde328df04699d494e9 192.168.1.31:6383
    61.    slots:[10923-16383] (5461 slots) master
    62.    1 additional replica(s)
    63. M: 89228357317c6b7d6850fffa2f0819085def1a2f 192.168.1.31:6382
    64.    slots:[5461-10922] (5462 slots) master
    65.    1 additional replica(s)
    66. [OK] All nodes agree about slots configuration.
    67. >>> Check for open slots...
    68. >>> Check slots coverage...
    69. [OK] All 16384 slots covered.
    70.  
    71. 重新分配槽号：
    72. root@localhost:/data# redis-cli --cluster reshard 192.168.1.31:6381
    73. >>> Performing Cluster Check (using node 192.168.1.31:6381)
    74. M: cd9a9149593770a920258bf75e1235ca4b904cd5 192.168.1.31:6381
    75.    slots:[0-6826],[10923-12287] (8192 slots) master
    76.    1 additional replica(s)
    77. M: f32e0d7320635a5873beb3594927ed6eea318976 192.168.1.31:6387
    78.    slots: (0 slots) master
    79. S: eac210d52a6c6ddeb9556ffa1820d13a89828264 192.168.1.31:6384
    80.    slots: (0 slots) slave
    81.    replicates 89228357317c6b7d6850fffa2f0819085def1a2f
    82. S: d8f0436ada2c423bc07d8cba38461eb3bb00ca3a 192.168.1.31:6385
    83.    slots: (0 slots) slave
    84.    replicates c2436c65625e1d74d8ea5bde328df04699d494e9
    85. S: 5b40728c470dac59556f7b51866e590e9038bbd9 192.168.1.31:6386
    86.    slots: (0 slots) slave
    87.    replicates cd9a9149593770a920258bf75e1235ca4b904cd5
    88. M: c2436c65625e1d74d8ea5bde328df04699d494e9 192.168.1.31:6383
    89.    slots:[12288-16383] (4096 slots) master
    90.    1 additional replica(s)
    91. M: 89228357317c6b7d6850fffa2f0819085def1a2f 192.168.1.31:6382
    92.    slots:[6827-10922] (4096 slots) master
    93.    1 additional replica(s)
    94. [OK] All nodes agree about slots configuration.
    95. >>> Check for open slots...
    96. >>> Check slots coverage...
    97. [OK] All 16384 slots covered.
    98. How many slots do you want to move (from 1 to 16384)? 4096 
    99. What is the receiving node ID? f32e0d7320635a5873beb3594927ed6eea318976 #6387的节点id
    100. Please enter all the source node IDs.
    101.   Type 'all' to use all the nodes as source nodes for the hash slots.
    102.   Type 'done' once you entered all the source nodes IDs.
    103. Source node #1: all   #从其他3个主节点拿槽位
    104.  
    105.  
    106. root@localhost:/data# redis-cli --cluster check 192.168.1.31:6381  
    107. 192.168.1.31:6381 (cd9a9149...) -> 1 keys | 4096 slots | 1 slaves.
    108. 192.168.1.31:6387 (f32e0d73...) -> 1 keys | 4096 slots | 0 slaves.
    109. 192.168.1.31:6383 (c2436c65...) -> 1 keys | 4096 slots | 1 slaves.
    110. 192.168.1.31:6382 (89228357...) -> 1 keys | 4096 slots | 1 slaves.
    111. [OK] 4 keys in 4 masters.
    112. 0.00 keys per slot on average.
    113. >>> Performing Cluster Check (using node 192.168.1.31:6381)
    114. M: cd9a9149593770a920258bf75e1235ca4b904cd5 192.168.1.31:6381
    115.    slots:[1365-5460] (4096 slots) master
    116.    1 additional replica(s)
    117. M: f32e0d7320635a5873beb3594927ed6eea318976 192.168.1.31:6387
    118.    slots:[0-1364],[5461-6826],[10923-12287] (4096 slots) master
    119. S: eac210d52a6c6ddeb9556ffa1820d13a89828264 192.168.1.31:6384
    120.    slots: (0 slots) slave
    121.    replicates 89228357317c6b7d6850fffa2f0819085def1a2f
    122. S: d8f0436ada2c423bc07d8cba38461eb3bb00ca3a 192.168.1.31:6385
    123.    slots: (0 slots) slave
    124.    replicates c2436c65625e1d74d8ea5bde328df04699d494e9
    125. S: 5b40728c470dac59556f7b51866e590e9038bbd9 192.168.1.31:6386
    126.    slots: (0 slots) slave
    127.    replicates cd9a9149593770a920258bf75e1235ca4b904cd5
    128. M: c2436c65625e1d74d8ea5bde328df04699d494e9 192.168.1.31:6383
    129.    slots:[12288-16383] (4096 slots) master
    130.    1 additional replica(s)
    131. M: 89228357317c6b7d6850fffa2f0819085def1a2f 192.168.1.31:6382
    132.    slots:[6827-10922] (4096 slots) master
    133.    1 additional replica(s)
    134. [OK] All nodes agree about slots configuration.
    135. >>> Check for open slots...
    136. >>> Check slots coverage...
    137. [OK] All 16384 slots covere
    138.  
    139. 可以看到6387是3个新的区间，以前的还是连续？
    140. 重新分配成本太高，所以3家各匀出来一部分，从6381、6382、6383三个旧节点，分别匀出1364个槽位给新节点6387
    141.  
    142. 给6387 添加slave 6388,f32e0d7320635a5873beb3594927ed6eea318976是6387的编号
    143. root@localhost:/data# redis-cli --cluster add-node 192.168.1.31:6388 192.168.1.31:6387 --cluster-slave --cluster-master-id f32e0d7320635a5873beb3594927ed6eea318976
    144. >>> Adding node 192.168.1.31:6388 to cluster 192.168.1.31:6387
    145. >>> Performing Cluster Check (using node 192.168.1.31:6387)
    146. M: f32e0d7320635a5873beb3594927ed6eea318976 192.168.1.31:6387
    147.    slots:[0-1364],[5461-6826],[10923-12287] (4096 slots) master
    148. S: 5b40728c470dac59556f7b51866e590e9038bbd9 192.168.1.31:6386
    149.    slots: (0 slots) slave
    150.    replicates cd9a9149593770a920258bf75e1235ca4b904cd5
    151. M: c2436c65625e1d74d8ea5bde328df04699d494e9 192.168.1.31:6383
    152.    slots:[12288-16383] (4096 slots) master
    153.    1 additional replica(s)
    154. M: 89228357317c6b7d6850fffa2f0819085def1a2f 192.168.1.31:6382
    155.    slots:[6827-10922] (4096 slots) master
    156.    1 additional replica(s)
    157. M: cd9a9149593770a920258bf75e1235ca4b904cd5 192.168.1.31:6381
    158.    slots:[1365-5460] (4096 slots) master
    159.    1 additional replica(s)
    160. S: eac210d52a6c6ddeb9556ffa1820d13a89828264 192.168.1.31:6384
    161.    slots: (0 slots) slave
    162.    replicates 89228357317c6b7d6850fffa2f0819085def1a2f
    163. S: d8f0436ada2c423bc07d8cba38461eb3bb00ca3a 192.168.1.31:6385
    164.    slots: (0 slots) slave
    165.    replicates c2436c65625e1d74d8ea5bde328df04699d494e9
    166. [OK] All nodes agree about slots configuration.
    167. >>> Check for open slots...
    168. >>> Check slots coverage...
    169. [OK] All 16384 slots covered.
    170. >>> Send CLUSTER MEET to node 192.168.1.31:6388 to make it join the cluster.
    171. Waiting for the cluster to join
    172. >>> Configure node as replica of 192.168.1.31:6387.
    173. [OK] New node added correctly.
    174.  
    175. root@localhost:/data# redis-cli --cluster check 192.168.1.31:6381
    176. 192.168.1.31:6381 (cd9a9149...) -> 1 keys | 4096 slots | 1 slaves.
    177. 192.168.1.31:6387 (f32e0d73...) -> 1 keys | 4096 slots | 1 slaves.
    178. 192.168.1.31:6383 (c2436c65...) -> 1 keys | 4096 slots | 1 slaves.
    179. 192.168.1.31:6382 (89228357...) -> 1 keys | 4096 slots | 1 slaves.
    180. [OK] 4 keys in 4 masters.
    181. 0.00 keys per slot on average.
    182. >>> Performing Cluster Check (using node 192.168.1.31:6381)
    183. M: cd9a9149593770a920258bf75e1235ca4b904cd5 192.168.1.31:6381
    184.    slots:[1365-5460] (4096 slots) master
    185.    1 additional replica(s)
    186. M: f32e0d7320635a5873beb3594927ed6eea318976 192.168.1.31:6387
    187.    slots:[0-1364],[5461-6826],[10923-12287] (4096 slots) master
    188.    1 additional replica(s)
    189. S: eac210d52a6c6ddeb9556ffa1820d13a89828264 192.168.1.31:6384
    190.    slots: (0 slots) slave
    191.    replicates 89228357317c6b7d6850fffa2f0819085def1a2f
    192. S: d8f0436ada2c423bc07d8cba38461eb3bb00ca3a 192.168.1.31:6385
    193.    slots: (0 slots) slave
    194.    replicates c2436c65625e1d74d8ea5bde328df04699d494e9
    195. S: 5b40728c470dac59556f7b51866e590e9038bbd9 192.168.1.31:6386
    196.    slots: (0 slots) slave
    197.    replicates cd9a9149593770a920258bf75e1235ca4b904cd5
    198. M: c2436c65625e1d74d8ea5bde328df04699d494e9 192.168.1.31:6383
    199.    slots:[12288-16383] (4096 slots) master
    200.    1 additional replica(s)
    201. S: a8fd323608979efd31be1222d281db20b250820b 192.168.1.31:6388
    202.    slots: (0 slots) slave
    203.    replicates f32e0d7320635a5873beb3594927ed6eea318976
    204. M: 89228357317c6b7d6850fffa2f0819085def1a2f 192.168.1.31:6382
    205.    slots:[6827-10922] (4096 slots) master
    206.    1 additional replica(s)
    207. [OK] All nodes agree about slots configuration.
    208. >>> Check for open slots...
    209. >>> Check slots coverage...
    210. [OK] All 16384 slots covered.

    8：主从缩容，将6387、6388踢出集群，恢复3主3从

    1. 1：先清除从节点6388
    2. root@localhost:/data# redis-cli --cluster del-node 192.168.1.31:6388 a8fd323608979efd31be1222d281db20b250820b
    3. >>> Removing node a8fd323608979efd31be1222d281db20b250820b from cluster 192.168.1.31:6388
    4. >>> Sending CLUSTER FORGET messages to the cluster...
    5. >>> Sending CLUSTER RESET SOFT to the deleted node.
    6. root@localhost:/data# 
    7. root@localhost:/data# redis-cli --cluster check 192.168.1.31:6381                                            
    8. 192.168.1.31:6381 (cd9a9149...) -> 1 keys | 4096 slots | 1 slaves.
    9. 192.168.1.31:6387 (f32e0d73...) -> 1 keys | 4096 slots | 0 slaves.
    10. 192.168.1.31:6383 (c2436c65...) -> 1 keys | 4096 slots | 1 slaves.
    11. 192.168.1.31:6382 (89228357...) -> 1 keys | 4096 slots | 1 slaves.
    12. [OK] 4 keys in 4 masters.
    13. 0.00 keys per slot on average.
    14. >>> Performing Cluster Check (using node 192.168.1.31:6381)
    15. M: cd9a9149593770a920258bf75e1235ca4b904cd5 192.168.1.31:6381
    16.    slots:[1365-5460] (4096 slots) master
    17.    1 additional replica(s)
    18. M: f32e0d7320635a5873beb3594927ed6eea318976 192.168.1.31:6387
    19.    slots:[0-1364],[5461-6826],[10923-12287] (4096 slots) master
    20. S: eac210d52a6c6ddeb9556ffa1820d13a89828264 192.168.1.31:6384
    21.    slots: (0 slots) slave
    22.    replicates 89228357317c6b7d6850fffa2f0819085def1a2f
    23. S: d8f0436ada2c423bc07d8cba38461eb3bb00ca3a 192.168.1.31:6385
    24.    slots: (0 slots) slave
    25.    replicates c2436c65625e1d74d8ea5bde328df04699d494e9
    26. S: 5b40728c470dac59556f7b51866e590e9038bbd9 192.168.1.31:6386
    27.    slots: (0 slots) slave
    28.    replicates cd9a9149593770a920258bf75e1235ca4b904cd5
    29. M: c2436c65625e1d74d8ea5bde328df04699d494e9 192.168.1.31:6383
    30.    slots:[12288-16383] (4096 slots) master
    31.    1 additional replica(s)
    32. M: 89228357317c6b7d6850fffa2f0819085def1a2f 192.168.1.31:6382
    33.    slots:[6827-10922] (4096 slots) master
    34.    1 additional replica(s)
    35. [OK] All nodes agree about slots configuration.
    36. >>> Check for open slots...
    37. >>> Check slots coverage...
    38. [OK] All 16384 slots covered.
    39. 检查发现6388被删除了，只剩下7台redis 
    40.  
    41. 2：清理出来的槽号重新分配
    42. 将6387的槽号清空，重新分配，本例将清出来的槽号都给6381
    43. root@localhost:/data# redis-cli --cluster reshard 192.168.1.31:6381
    44. >>> Performing Cluster Check (using node 192.168.1.31:6381)
    45. M: cd9a9149593770a920258bf75e1235ca4b904cd5 192.168.1.31:6381
    46.    slots:[1365-5460] (4096 slots) master
    47.    1 additional replica(s)
    48. M: f32e0d7320635a5873beb3594927ed6eea318976 192.168.1.31:6387
    49.    slots:[0-1364],[5461-6826],[10923-12287] (4096 slots) master
    50. S: eac210d52a6c6ddeb9556ffa1820d13a89828264 192.168.1.31:6384
    51.    slots: (0 slots) slave
    52.    replicates 89228357317c6b7d6850fffa2f0819085def1a2f
    53. S: d8f0436ada2c423bc07d8cba38461eb3bb00ca3a 192.168.1.31:6385
    54.    slots: (0 slots) slave
    55.    replicates c2436c65625e1d74d8ea5bde328df04699d494e9
    56. S: 5b40728c470dac59556f7b51866e590e9038bbd9 192.168.1.31:6386
    57.    slots: (0 slots) slave
    58.    replicates cd9a9149593770a920258bf75e1235ca4b904cd5
    59. M: c2436c65625e1d74d8ea5bde328df04699d494e9 192.168.1.31:6383
    60.    slots:[12288-16383] (4096 slots) master
    61.    1 additional replica(s)
    62. M: 89228357317c6b7d6850fffa2f0819085def1a2f 192.168.1.31:6382
    63.    slots:[6827-10922] (4096 slots) master
    64.    1 additional replica(s)
    65. [OK] All nodes agree about slots configuration.
    66. >>> Check for open slots...
    67. >>> Check slots coverage...
    68. [OK] All 16384 slots covered.
    69. How many slots do you want to move (from 1 to 16384)? 4096 
    70. What is the receiving node ID? cd9a9149593770a920258bf75e1235ca4b904cd5   #6381节点id，用来接收空出来的槽号
    71. Source node #1: f32e0d7320635a5873beb3594927ed6eea318976                  #6387节点id，被删除的那个
    72. Source node #2: done
    73.     Moving slot 12284 from f32e0d7320635a5873beb3594927ed6eea318976
    74.     Moving slot 12285 from f32e0d7320635a5873beb3594927ed6eea318976
    75.     Moving slot 12286 from f32e0d7320635a5873beb3594927ed6eea318976
    76.     Moving slot 12287 from f32e0d7320635a5873beb3594927ed6eea318976
    77. Do you want to proceed with the proposed reshard plan (yes/no)? yes
    78. Moving slot 12284 from 192.168.1.31:6387 to 192.168.1.31:6381: 
    79. Moving slot 12285 from 192.168.1.31:6387 to 192.168.1.31:6381: 
    80. Moving slot 12286 from 192.168.1.31:6387 to 192.168.1.31:6381: 
    81. Moving slot 12287 from 192.168.1.31:6387 to 192.168.1.31:6381:
    82.  
    83. root@localhost:/data# redis-cli --cluster check 192.168.1.31:6381  
    84. 192.168.1.31:6381 (cd9a9149...) -> 2 keys | 8192 slots | 1 slaves.
    85. 192.168.1.31:6387 (f32e0d73...) -> 0 keys | 0 slots | 0 slaves.
    86. 192.168.1.31:6383 (c2436c65...) -> 1 keys | 4096 slots | 1 slaves.
    87. 192.168.1.31:6382 (89228357...) -> 1 keys | 4096 slots | 1 slaves.
    88. [OK] 4 keys in 4 masters.
    89. 0.00 keys per slot on average.
    90. >>> Performing Cluster Check (using node 192.168.1.31:6381)
    91. M: cd9a9149593770a920258bf75e1235ca4b904cd5 192.168.1.31:6381
    92.    slots:[0-6826],[10923-12287] (8192 slots) master
    93.    1 additional replica(s)
    94. M: f32e0d7320635a5873beb3594927ed6eea318976 192.168.1.31:6387
    95.    slots: (0 slots) master
    96. S: eac210d52a6c6ddeb9556ffa1820d13a89828264 192.168.1.31:6384
    97.    slots: (0 slots) slave
    98.    replicates 89228357317c6b7d6850fffa2f0819085def1a2f
    99. S: d8f0436ada2c423bc07d8cba38461eb3bb00ca3a 192.168.1.31:6385
    100.    slots: (0 slots) slave
    101.    replicates c2436c65625e1d74d8ea5bde328df04699d494e9
    102. S: 5b40728c470dac59556f7b51866e590e9038bbd9 192.168.1.31:6386
    103.    slots: (0 slots) slave
    104.    replicates cd9a9149593770a920258bf75e1235ca4b904cd5
    105. M: c2436c65625e1d74d8ea5bde328df04699d494e9 192.168.1.31:6383
    106.    slots:[12288-16383] (4096 slots) master
    107.    1 additional replica(s)
    108. M: 89228357317c6b7d6850fffa2f0819085def1a2f 192.168.1.31:6382
    109.    slots:[6827-10922] (4096 slots) master
    110.    1 additional replica(s)
    111. [OK] All nodes agree about slots configuration.
    112. >>> Check for open slots...
    113. >>> Check slots coverage...
    114. [OK] All 16384 slots covered.
    115.  
    116. 6387的4096个槽位都给6381了，6381有8192个槽位了
    117.  
    118.  
    119. 3：再删除6387
    120. root@localhost:/data# redis-cli --cluster del-node 192.168.1.31:6387 f32e0d7320635a5873beb3594927ed6eea318976
    121. >>> Removing node f32e0d7320635a5873beb3594927ed6eea318976 from cluster 192.168.1.31:6387
    122. >>> Sending CLUSTER FORGET messages to the cluster...
    123. >>> Sending CLUSTER RESET SOFT to the deleted node.
    125.  
    126. 4：恢复成3主3从
    127. root@localhost:/data# redis-cli --cluster check 192.168.1.31:6381                                            
    128. 192.168.1.31:6381 (cd9a9149...) -> 2 keys | 8192 slots | 1 slaves.
    129. 192.168.1.31:6383 (c2436c65...) -> 1 keys | 4096 slots | 1 slaves.
    130. 192.168.1.31:6382 (89228357...) -> 1 keys | 4096 slots | 1 slaves.
    131. [OK] 4 keys in 3 masters.
    132. 0.00 keys per slot on average.
    133. >>> Performing Cluster Check (using node 192.168.1.31:6381)
    134. M: cd9a9149593770a920258bf75e1235ca4b904cd5 192.168.1.31:6381
    135.    slots:[0-6826],[10923-12287] (8192 slots) master
    136.    1 additional replica(s)
    137. S: eac210d52a6c6ddeb9556ffa1820d13a89828264 192.168.1.31:6384
    138.    slots: (0 slots) slave
    139.    replicates 89228357317c6b7d6850fffa2f0819085def1a2f
    140. S: d8f0436ada2c423bc07d8cba38461eb3bb00ca3a 192.168.1.31:6385
    141.    slots: (0 slots) slave
    142.    replicates c2436c65625e1d74d8ea5bde328df04699d494e9
    143. S: 5b40728c470dac59556f7b51866e590e9038bbd9 192.168.1.31:6386
    144.    slots: (0 slots) slave
    145.    replicates cd9a9149593770a920258bf75e1235ca4b904cd5
    146. M: c2436c65625e1d74d8ea5bde328df04699d494e9 192.168.1.31:6383
    147.    slots:[12288-16383] (4096 slots) master
    148.    1 additional replica(s)
    149. M: 89228357317c6b7d6850fffa2f0819085def1a2f 192.168.1.31:6382
    150.    slots:[6827-10922] (4096 slots) master
    151.    1 additional replica(s)
    152. [OK] All nodes agree about slots configuration.
    153. >>> Check for open slots...
    154. >>> Check slots coverage...
    155. [OK] All 16384 slots covered.

  • 相关阅读:
    nginx端口映射后，跳转带的是内网端口而不是内网端口
    flink 处理IOT数据
    2023汕头大学计算机考研信息汇总
    plt 画图不显示label
    HTML期末学生大作业-节日网页作业html+css+javascript
    makefile & dockerfile
    轮转数组问题：如何实现数组“整体逆序，内部有序”？“三步转换法”妙转数组
    8月汽车销量出炉：问界破万，智己破千，理想腰斩！埃安近创新高
    机器学习中参数优化调试方法
    .NET开源功能强大的串口调试工具
  • 原文地址：https://blog.csdn.net/zhanglei_16/article/details/134450914