關於docker compose安裝redis叢集的問題(叢集擴容、叢集收縮)

# redis埠
port ${PORT}
#redis 存取密碼
requirepass 123456
#redis 存取Master節點密碼
masterauth 123456
# 關閉保護模式
protected-mode no
# 開啟叢集
cluster-enabled yes
# 叢集節點設定
cluster-config-file nodes.conf
# 超時
cluster-node-timeout 5000
# 叢集節點IP host模式為宿主機IP
# cluster-announce-ip 192.168.1.10
# 叢集節點埠 7001 - 7006
cluster-announce-port ${PORT}
cluster-announce-bus-port 1${PORT}
# 開啟 appendonly 備份模式
appendonly yes
# 每秒鐘備份
appendfsync everysec
# 對aof檔案進行壓縮時，是否執行同步操作
no-appendfsync-on-rewrite no
# 當目前aof檔案大小超過上一次重寫時的aof檔案大小的100%時會再次進行重寫
auto-aof-rewrite-percentage 100
# 重寫前AOF檔案的大小最小值 預設 64mb
auto-aof-rewrite-min-size 64mb

# 紀錄檔設定
# debug:會列印生成大量資訊，適用於開發/測試階段
# verbose:包含很多不太有用的資訊，但是不像debug級別那麼混亂
# notice:適度冗長，適用於生產環境
# warning:僅記錄非常重要、關鍵的警告訊息
loglevel notice
# 紀錄檔檔案路徑
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:
      # 設定時區為上海，否則時間會有問題
      - 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:Usersbillow>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.

-- 叢集、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
-- 測試
docker exec -it redis-7001 redis-cli -h 192.168.44.65 -p 7003 -a 123456 -c
-- 檢視叢集狀態
cluster nodes
-- 檢視分片資訊
cluster slots
-- 檢視叢集資訊
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:
      # 設定時區為上海，否則時間會有問題
      - 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

-- 進入任意節點
docker exet -it redis-7001 bash

-- 新增主節點(192.168.44.65:7001 -a 123456  這個可以是任何已存在的節點，主要用於獲取叢集資訊)
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

-- 進入任意節點
docker exet -it redis-7001 bash

-- 新增從節點(192.168.44.65:7001 -a 123456  這個可以是任何已存在的節點，主要用於獲取叢集資訊)(6f0c7d0ae166717d645e84b48b72b9706c7c758a  為剛加的主節點 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：這個是必傳引數，用來從一個節點獲取整個叢集資訊，相當於獲取叢集資訊的入口。
--weight <arg>：節點的權重，格式為node_id=weight，如果需要為多個節點分配權重的話，需要新增多個--weight <arg>引數，即--weight b31e3a2e=5 --weight 60b8e3a1=5，node_id可為節點名稱的字首，只要保證字首位數能唯一區分該節點即可。沒有傳遞–weight的節點的權重預設為1。
--auto-weights：這個引數在rebalance流程中並未用到。
--threshold <arg>：只有節點需要遷移的slot閾值超過threshold，才會執行rebalance操作。具體計算方法可以參考下面的rebalance命令流程的第四步。
--use-empty-masters：rebalance是否考慮沒有節點的master，預設沒有分配slot節點的master是不參與rebalance的，設定--use-empty-masters可以讓沒有分配slot的節點參與rebalance。
--timeout <arg>：設定migrate命令的超時時間。
--simulate：設定該引數，可以模擬rebalance操作，提示使用者會遷移哪些slots，而不會真正執行遷移操作。
--pipeline <arg>：與reshar的pipeline引數一樣，定義cluster getkeysinslot命令一次取出的key數量，不傳的話使用預設值為10。

-- 分配插槽(192.168.44.65:7001 -a 123456  這個可以是任何已存在的節點，主要用於獲取叢集資訊)
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"

叢集
cluster info ：列印叢集的資訊

cluster nodes ：列出叢集當前已知的所有節點（ node），以及這些節點的相關資訊。
節點
cluster meet <ip> <port> ：將 ip 和 port 所指定的節點新增到叢集當中，讓它成為叢集的一份子。
cluster forget <node_id> ：從叢集中移除 node_id 指定的節點。
cluster replicate <node_id> ：將當前節點設定為 node_id 指定的節點的從節點。
cluster saveconfig ：將節點的組態檔儲存到硬碟裡面。
槽(slot)
cluster addslots <slot> [slot ...] ：將一個或多個槽（ slot）指派（ assign）給當前節點。
cluster delslots <slot> [slot ...] ：移除一個或多個槽對當前節點的指派。
cluster flushslots ：移除指派給當前節點的所有槽，讓當前節點變成一個沒有指派任何槽的節點。
cluster setslot <slot> node <node_id> ：將槽 slot 指派給 node_id 指定的節點，如果槽已經指派給另一個節點，那麼先讓另一個節點刪除該槽>，然後再進行指派。
cluster setslot <slot> migrating <node_id> ：將本節點的槽 slot 遷移到 node_id 指定的節點中。
cluster setslot <slot> importing <node_id> ：從 node_id 指定的節點中匯入槽 slot 到本節點。
cluster setslot <slot> stable ：取消對槽 slot 的匯入（ import）或者遷移（ migrate）。
鍵
cluster keyslot <key> ：計算鍵 key 應該被放置在哪個槽上。
cluster countkeysinslot <slot> ：返回槽 slot 目前包含的鍵值對數量。
cluster getkeysinslot <slot> <count> ：返回 count 個 slot 槽中的鍵