概述
一兩撥千斤，項目環境中某個環節爲了安全性的需要，因爲項目環境也是一個生態鏈嘛，所以就進行了所有的升級，其中涉及到Redis版本升級。
在上一篇文章中【CentOs7搭建基於Redis-4.0.2的集羣環境之圖文詳解】已經對Redis進行了一些基本的詳細的介紹，但是是基於Redis4.x的版本進行的，今年，Redis又進行了一次革命性版本變革，升級到了Redis-5.x版本，在本文章一些基本的概念就不再重複的闡述，本文主要結合官方文檔以更加主觀的方式來介紹Redis-5.x的一些更本性的變化，以及如何正確快捷的基於最新的Redis-5.x搭建一個Redis集羣環境。
官網文檔：https://redis.io/documentation
關於 Redis 集羣數據分片：
在官文中得出結論，當前Redis-5.x新版本構建集羣使用Redis的客戶端工具“ redis-cli ” 進行的，而Redis-4.x及Redis-3.x使用的 “ redis-trib ” 連接器進行構建的，語法如下：
redis-cli --cluster SUBCOMMAND [ARGUMENTS] [OPTIONS]
如果想構建一個基於Redis-5.x的集羣環境，請繼續往下看》》》
Linux-7.7下基於最新版Redis-5.0.5集羣環境搭建與配置
如果還是使用以前的方式的話，就不行了：
具體信息如下：
[root@localhost redis_cluster]# ./redis-trib.rb create --replicas 1 192.168.159.129:9001 192.168.159.129:9002 192.168.159.129:9003 192.168.159.129:9004 192.168.159.129:9005 192.168.159.129:9006
WARNING: redis-trib.rb is not longer available!
You should use redis-cli instead.
All commands and features belonging to redis-trib.rb have been moved
to redis-cli.
In order to use them you should call redis-cli with the --cluster
option followed by the subcommand name, arguments and options.
Use the following syntax:
redis-cli --cluster SUBCOMMAND [ARGUMENTS] [OPTIONS]
Example:
redis-cli --cluster create 192.168.159.129:9001 192.168.159.129:9002 192.168.159.129:9003 192.168.159.129:9004 192.168.159.129:9005 192.168.159.129:9006 --cluster-replicas 1
To get help about all subcommands, type:
redis-cli --cluster help
所以必須使用Redis的腳本工具 “ redis-cli ” 進行創建
輸入命令 “ ./redis-cli --cluster create 192.168.159.129:9001 192.168.159.129:9002 192.168.159.129:9003 192.168.159.129:9004 192.168.159.129:9005 192.168.159.129:9006 --cluster-replicas 1 ”
如果還不知道怎麼準備的，請參看【CentOs7搭建基於Redis-4.0.2的集羣環境之圖文詳解】
創建內容如下：
[root@localhost redis_001]# ./redis-cli --cluster create 192.168.159.129:9001 192.168.159.129:9002 192.168.159.129:9003 192.168.159.129:9004 192.168.159.129:9005 192.168.159.129:9006 --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 192.168.159.129:9005 to 192.168.159.129:9001
Adding replica 192.168.159.129:9006 to 192.168.159.129:9002
Adding replica 192.168.159.129:9004 to 192.168.159.129:9003
>>> Trying to optimize slaves allocation for anti-affinity
[WARNING] Some slaves are in the same host as their master
M: 6298907d9f4facfdc6b68e985013d80a5344a2da 192.168.159.129:9001
slots:[0-5460] (5461 slots) master
M: 6d484bad6d77a8f7bf350a475471f11f79f0338a 192.168.159.129:9002
slots:[5461-10922] (5462 slots) master
M: 88dff0c3f9705cb03797c1ebf933e1a184b5bb5d 192.168.159.129:9003
slots:[10923-16383] (5461 slots) master
S: 0e5dbfa0b083c0246a28781cb8c891fe882014c3 192.168.159.129:9004
replicates 6298907d9f4facfdc6b68e985013d80a5344a2da
S: b2e4faa325739badb7b272c15ead7b4321aa05d3 192.168.159.129:9005
replicates 6d484bad6d77a8f7bf350a475471f11f79f0338a
S: d2c554a34412e6767f1d512c8db03fdd81067f4e 192.168.159.129:9006
replicates 88dff0c3f9705cb03797c1ebf933e1a184b5bb5d
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 192.168.159.129:9001)
M: 6298907d9f4facfdc6b68e985013d80a5344a2da 192.168.159.129:9001
slots:[0-5460] (5461 slots) master
1 additional replica(s)
S: b2e4faa325739badb7b272c15ead7b4321aa05d3 192.168.159.129:9005
slots: (0 slots) slave
replicates 6d484bad6d77a8f7bf350a475471f11f79f0338a
M: 6d484bad6d77a8f7bf350a475471f11f79f0338a 192.168.159.129:9002
slots:[5461-10922] (5462 slots) master
1 additional replica(s)
S: 0e5dbfa0b083c0246a28781cb8c891fe882014c3 192.168.159.129:9004
slots: (0 slots) slave
replicates 6298907d9f4facfdc6b68e985013d80a5344a2da
S: d2c554a34412e6767f1d512c8db03fdd81067f4e 192.168.159.129:9006
slots: (0 slots) slave
replicates 88dff0c3f9705cb03797c1ebf933e1a184b5bb5d
M: 88dff0c3f9705cb03797c1ebf933e1a184b5bb5d 192.168.159.129:9003
slots:[10923-16383] (5461 slots) master
1 additional replica(s)
[OK] All nodes agree about slots configuration.
>>> Check for open slots...
>>> Check slots coverage...
[OK] All 16384 slots covered.
hash-slots的分配如下：
【圖1】
【圖2】
好了，關於 Linux-7.7下基於最新版Redis-5.0.5集羣環境搭建與配置詳細教程 就寫到這兒了，如果還有什麼疑問或遇到什麼問題歡迎掃碼提問，也可以給我留言哦，我會一一詳細的解答的。
歇後語：“ 共同學習，共同進步 ”，也希望大家多多關注CSND的IT社區。
| 作 者： | 華 仔 |
| 聯繫作者： | [email protected] |
| 來 源： | CSDN (Chinese Software Developer Network) |
| 原 文： | https://blog.csdn.net/Hello_World_QWP/article/details/102820018 |
| 版權聲明： | 本文爲博主原創文章，請在轉載時務必註明博文出處！ |