关于docker compose安装redis集群的问题(集群扩容、集群收缩)

# redis端口
port ${PORT}
#redis 访问密码
requirepass 123456
#redis 访问Master节点密码
masterauth 123456
# 关闭保护模式
protected-mode no
# 开启集群
cluster-enabled yes
# 集群节点配置
cluster-config-file nodes.conf
# 超时
cluster-node-timeout 5000
# 集群节点IP host模式为宿主机IP
# cluster-announce-ip 192.168.1.10
# 集群节点端口 7001 - 7006
cluster-announce-port ${PORT}
cluster-announce-bus-port 1${PORT}
# 开启 appendonly 备份模式
appendonly yes
# 每秒钟备份
appendfsync everysec
# 对aof文件进行压缩时，是否执行同步操作
no-appendfsync-on-rewrite no
# 当目前aof文件大小超过上一次重写时的aof文件大小的100%时会再次进行重写
auto-aof-rewrite-percentage 100
# 重写前AOF文件的大小最小值 默认 64mb
auto-aof-rewrite-min-size 64mb

# 日志配置
# debug:会打印生成大量信息，适用于开发/测试阶段
# verbose:包含很多不太有用的信息，但是不像debug级别那么混乱
# notice:适度冗长，适用于生产环境
# warning:仅记录非常重要、关键的警告消息
loglevel notice
# 日志文件路径
logfile "/data/redis.log"

for port in `seq 7001 7006`; do \
  mkdir -p ./${port}/conf \
  && PORT=${port} envsubst < ./redis-cluster.tmpl > ./${port}/conf/redis.conf \
  && mkdir -p ./${port}/data; \
done

version: '3'
services:
  redis-7001:
    image: redis:6
    container_name: redis-7001
    command:
      ["redis-server", "/usr/local/etc/redis/redis.conf"]
    volumes:
      - ./7001/conf/redis.conf:/usr/local/etc/redis/redis.conf
      - ./7001/data:/data
    ports:
      - "7001:7001"
      - "17001:17001"
    environment:
      # 设置时区为上海，否则时间会有问题
      - TZ=Asia/Shanghai
    logging:
      options:
        max-size: '100m'
        max-file: '10'
  redis-7002:
    container_name: redis-7002
      - ./7002/conf/redis.conf:/usr/local/etc/redis/redis.conf
      - ./7002/data:/data
      - "7002:7002"
      - "17002:17002"
  redis-7003:
    container_name: redis-7003
      - ./7003/conf/redis.conf:/usr/local/etc/redis/redis.conf
      - ./7003/data:/data
      - "7003:7003"
      - "17003:17003"
  redis-7004:
    container_name: redis-7004
      - ./7004/conf/redis.conf:/usr/local/etc/redis/redis.conf
      - ./7004/data:/data
      - "7004:7004"
      - "17004:17004"
  redis-7005:
    container_name: redis-7005
      - ./7005/conf/redis.conf:/usr/local/etc/redis/redis.conf
      - ./7005/data:/data
      - "7005:7005"
      - "17005:17005"
  redis-7006:
    container_name: redis-7006
      - ./7006/conf/redis.conf:/usr/local/etc/redis/redis.conf
      - ./7006/data:/data
      - "7006:7006"
      - "17006:17006"

C:\Users\billow>docker exec -it redis-7001 redis-cli -p 7001 -a 123456 --cluster create 192.168.44.65:7001 192.168.44.65:7002 192.168.44.65:7003 192.168.44.65:7004 192.168.44.65:7005 192.168.44.65:7006 --cluster-replicas 1
>>> Performing hash slots allocation on 6 nodes...
Master[0] -> Slots 0 - 5460
Master[1] -> Slots 5461 - 10922
Master[2] -> Slots 10923 - 16383
Adding replica 192.168.44.65:7005 to 192.168.44.65:7001
Adding replica 192.168.44.65:7006 to 192.168.44.65:7002
Adding replica 192.168.44.65:7004 to 192.168.44.65:7003
>>> Trying to optimize slaves allocation for anti-affinity
[WARNING] Some slaves are in the same host as their master
M: 741c7bb537888ff97866896abb22da27c22f8eaf 192.168.44.65:7001
   slots:[0-5460] (5461 slots) master
M: e5f687462a0c47f51c3abf4b8d77d646a3d63fa9 192.168.44.65:7002
   slots:[5461-10922] (5462 slots) master
M: 9936d3690d971eccfc8b8ed43c5defc66f318454 192.168.44.65:7003
   slots:[10923-16383] (5461 slots) master
S: b7b6fa6a4766c32c5d42d759548d6fcdf2b9159b 192.168.44.65:7004
   replicates e5f687462a0c47f51c3abf4b8d77d646a3d63fa9
S: 2275c996f25a8815342e2435af073eb29565778b 192.168.44.65:7005
   replicates 9936d3690d971eccfc8b8ed43c5defc66f318454
S: f69a5d0ae974816396a9d9e613c13f6ceea25de2 192.168.44.65:7006
   replicates 741c7bb537888ff97866896abb22da27c22f8eaf
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 192.168.44.65:7001)
M: 741c7bb537888ff97866896abb22da27c22f8eaf 192.168.44.65:7001
   slots:[0-5460] (5461 slots) master
   1 additional replica(s)
S: f69a5d0ae974816396a9d9e613c13f6ceea25de2 172.25.0.11:7006
   slots: (0 slots) slave
   replicates 741c7bb537888ff97866896abb22da27c22f8eaf
M: 9936d3690d971eccfc8b8ed43c5defc66f318454 172.25.0.7:7003
   slots:[10923-16383] (5461 slots) master
   1 additional replica(s)
M: e5f687462a0c47f51c3abf4b8d77d646a3d63fa9 172.25.0.8:7002
   slots:[5461-10922] (5462 slots) master
   1 additional replica(s)
S: 2275c996f25a8815342e2435af073eb29565778b 172.25.0.10:7005
   slots: (0 slots) slave
   replicates 9936d3690d971eccfc8b8ed43c5defc66f318454
S: b7b6fa6a4766c32c5d42d759548d6fcdf2b9159b 172.25.0.9:7004
   slots: (0 slots) slave
   replicates e5f687462a0c47f51c3abf4b8d77d646a3d63fa9
[OK] All nodes agree about slots configuration.
>>> Check for open slots...
>>> Check slots coverage...
[OK] All 16384 slots covered.

-- 集群、分配插槽
docker exec -it redis-7001 redis-cli -p 7001 -a 123456 --cluster create 192.168.44.65:7001 192.168.44.65:7002 192.168.44.65:7003 192.168.44.65:7004 192.168.44.65:7005 192.168.44.65:7006 --cluster-replicas 1
-- 测试
docker exec -it redis-7001 redis-cli -h 192.168.44.65 -p 7003 -a 123456 -c
-- 查看集群状态
cluster nodes
-- 查看分片信息
cluster slots
-- 查看集群信息
cluster info

version: '3'

services:
  redis-7007:
    image: redis:6
    container_name: redis-7007
    command:
      ["redis-server", "/usr/local/etc/redis/redis.conf"]
    volumes:
      - ./7007/conf/redis.conf:/usr/local/etc/redis/redis.conf
      - ./7007/data:/data
    ports:
      - "7007:7007"
      - "17007:17007"
    environment:
      # 设置时区为上海，否则时间会有问题
      - TZ=Asia/Shanghai
    logging:
      options:
        max-size: '100m'
        max-file: '10'
  redis-7008:
    container_name: redis-7008
      - ./7008/conf/redis.conf:/usr/local/etc/redis/redis.conf
      - ./7008/data:/data
      - "7008:7008"
      - "17008:17008"
networks:
    default:
        external:
            name: learn_shop

-- 进入任意节点
docker exet -it redis-7001 bash

-- 添加主节点(192.168.44.65:7001 -a 123456  这个可以是任何已存在的节点，主要用于获取集群信息)
redis-cli --cluster add-node 192.168.44.65:7007 192.168.44.65:7001 -a 123456

127.0.0.1:7001> cluster nodes
741c7bb537888ff97866896abb22da27c22f8eaf 172.25.0.10:7001@17001 myself,master - 0 1648104789000 1 connected 0-5460
2275c996f25a8815342e2435af073eb29565778b 172.25.0.6:7005@17005 slave 9936d3690d971eccfc8b8ed43c5defc66f318454 0 1648104789523 3 connected
6f0c7d0ae166717d645e84b48b72b9706c7c758a 172.25.0.13:7007@17007 master - 0 1648104790133 0 connected
9936d3690d971eccfc8b8ed43c5defc66f318454 172.25.0.8:7003@17003 master - 0 1648104790546 3 connected 10923-16383
f69a5d0ae974816396a9d9e613c13f6ceea25de2 172.25.0.11:7006@17006 slave 741c7bb537888ff97866896abb22da27c22f8eaf 0 1648104790000 1 connected
b7b6fa6a4766c32c5d42d759548d6fcdf2b9159b 172.25.0.9:7004@17004 slave e5f687462a0c47f51c3abf4b8d77d646a3d63fa9 0 1648104790000 2 connected
e5f687462a0c47f51c3abf4b8d77d646a3d63fa9 172.25.0.7:7002@17002 master - 0 1648104791062 2 connected 5461-10922

-- 进入任意节点
docker exet -it redis-7001 bash

-- 添加从节点(192.168.44.65:7001 -a 123456  这个可以是任何已存在的节点，主要用于获取集群信息)(6f0c7d0ae166717d645e84b48b72b9706c7c758a  为刚加的主节点 id)
redis-cli --cluster add-node --cluster-slave --cluster-master-id 6f0c7d0ae166717d645e84b48b72b9706c7c758a 192.168.44.65:7008 192.168.44.65:7001 -a 123456

rebalance host:port
--weight <arg>
--auto-weights
--threshold <arg>
--use-empty-masters
--timeout <arg>
--simulate
--pipeline <arg>

host:port：这个是必传参数，用来从一个节点获取整个集群信息，相当于获取集群信息的入口。
--weight <arg>：节点的权重，格式为node_id=weight，如果需要为多个节点分配权重的话，需要添加多个--weight <arg>参数，即--weight b31e3a2e=5 --weight 60b8e3a1=5，node_id可为节点名称的前缀，只要保证前缀位数能唯一区分该节点即可。没有传递–weight的节点的权重默认为1。
--auto-weights：这个参数在rebalance流程中并未用到。
--threshold <arg>：只有节点需要迁移的slot阈值超过threshold，才会执行rebalance操作。具体计算方法可以参考下面的rebalance命令流程的第四步。
--use-empty-masters：rebalance是否考虑没有节点的master，默认没有分配slot节点的master是不参与rebalance的，设置--use-empty-masters可以让没有分配slot的节点参与rebalance。
--timeout <arg>：设置migrate命令的超时时间。
--simulate：设置该参数，可以模拟rebalance操作，提示用户会迁移哪些slots，而不会真正执行迁移操作。
--pipeline <arg>：与reshar的pipeline参数一样，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。

-- 分配插槽(192.168.44.65:7001 -a 123456  这个可以是任何已存在的节点，主要用于获取集群信息)
redis-cli --cluster rebalance --cluster-threshold 1 --cluster-use-empty-masters 192.168.44.65:7001 -a 123456

root@aa1e004c00ff:/data# redis-cli -p 7001 -a 123456 -c
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
127.0.0.1:7001> set 1 1
-> Redirected to slot [9842] located at 172.25.0.7:7002
OK
172.25.0.7:7002> set 2 2
-> Redirected to slot [5649] located at 172.25.0.13:7007
OK
172.25.0.13:7007> set 3 3
-> Redirected to slot [1584] located at 172.25.0.10:7001
OK
172.25.0.10:7001> set 4 4
-> Redirected to slot [14039] located at 172.25.0.8:7003
OK
172.25.0.8:7003> set 5 5
-> Redirected to slot [9974] located at 172.25.0.7:7002
OK
172.25.0.7:7002> set 6 6
-> Redirected to slot [5781] located at 172.25.0.13:7007
OK
172.25.0.13:7007> set 7 7
-> Redirected to slot [1716] located at 172.25.0.10:7001
OK
172.25.0.10:7001>
172.25.0.10:7001>
172.25.0.10:7001>
172.25.0.10:7001>
172.25.0.10:7001> get 1
-> Redirected to slot [9842] located at 172.25.0.7:7002
"1"
172.25.0.7:7002> get 2
-> Redirected to slot [5649] located at 172.25.0.13:7007
"2"
172.25.0.13:7007> get 3
-> Redirected to slot [1584] located at 172.25.0.10:7001
"3"
172.25.0.10:7001> get 4
-> Redirected to slot [14039] located at 172.25.0.8:7003
"4"
172.25.0.8:7003> get 5
-> Redirected to slot [9974] located at 172.25.0.7:7002
"5"
172.25.0.7:7002> get 6
-> Redirected to slot [5781] located at 172.25.0.13:7007
"6"
172.25.0.13:7007> get 7
-> Redirected to slot [1716] located at 172.25.0.10:7001
"7"

集群
cluster info ：打印集群的信息

cluster nodes ：列出集群当前已知的所有节点（ node），以及这些节点的相关信息。
节点
cluster meet <ip> <port> ：将 ip 和 port 所指定的节点添加到集群当中，让它成为集群的一份子。
cluster forget <node_id> ：从集群中移除 node_id 指定的节点。
cluster replicate <node_id> ：将当前节点设置为 node_id 指定的节点的从节点。
cluster saveconfig ：将节点的配置文件保存到硬盘里面。
槽(slot)
cluster addslots <slot> [slot ...] ：将一个或多个槽（ slot）指派（ assign）给当前节点。
cluster delslots <slot> [slot ...] ：移除一个或多个槽对当前节点的指派。
cluster flushslots ：移除指派给当前节点的所有槽，让当前节点变成一个没有指派任何槽的节点。
cluster setslot <slot> node <node_id> ：将槽 slot 指派给 node_id 指定的节点，如果槽已经指派给另一个节点，那么先让另一个节点删除该槽>，然后再进行指派。
cluster setslot <slot> migrating <node_id> ：将本节点的槽 slot 迁移到 node_id 指定的节点中。
cluster setslot <slot> importing <node_id> ：从 node_id 指定的节点中导入槽 slot 到本节点。
cluster setslot <slot> stable ：取消对槽 slot 的导入（ import）或者迁移（ migrate）。
键
cluster keyslot <key> ：计算键 key 应该被放置在哪个槽上。
cluster countkeysinslot <slot> ：返回槽 slot 目前包含的键值对数量。
cluster getkeysinslot <slot> <count> ：返回 count 个 slot 槽中的键