Redis教程

Docker 搭建 Redis Cluster 集群

本文主要是介绍Docker 搭建 Redis Cluster 集群，对大家解决编程问题具有一定的参考价值，需要的程序猿们随着小编来一起学习吧！

Redis 配置文件

根据需要自己可以定制

# bind 127.0.0.1
port ${PORT}
protected-mode no
cluster-enabled yes
cluster-config-file nodes-${PORT}.conf
cluster-node-timeout 5000
cluster-announce-ip 10.0.18.8
cluster-announce-port ${PORT}
cluster-announce-bus-port 1${PORT}
appendonly yes
appendfsync everysec
no-appendfsync-on-rewrite no
auto-aof-rewrite-percentage 100
auto-aof-rewrite-min-size 64mb
  • bind：IP地址需要注释;
  • port：节点端口；
  • requirepass：添加访问认证；
  • masterauth：如果主节点开启了访问认证，从节点访问主节点需要认证；
  • protected-mode：保护模式，默认值 yes，即开启。开启保护模式以后，需配置 bind ip 或者设置访问密码；关闭保护模式，外部网络可以直接访问；
  • daemonize：是否以守护线程的方式启动（后台启动），默认 no
  • appendonly：是否开启 AOF 持久化模式，默认 no；
  • cluster-config-file：集群节点信息文件；
  • cluster-node-timeout：集群节点连接超时时间；
  • cluster-announce-ip：集群节点 IP，填写宿主机的 IP；
  • cluster-announce-port：集群节点映射端口；
  • cluster-announce-bus-port：集群节点总线端口。

每个 Redis 集群节点都需要打开两个 TCP 连接。

一个用于为客户端提供服务的正常 Redis TCP 端口，例如 6379。还有一个基于 6379 端口加 10000 的端口，比如 16379。

第二个端口用于集群总线，这是一个使用二进制协议的节点到节点通信通道。

节点使用集群总线进行故障检测、配置更新、故障转移授权等等。

客户端永远不要尝试与集群总线端口通信，与正常的 Redis 命令端口通信即可

但是请确保防火墙中的这两个端口都已经打开，否则 Redis 集群节点将无法通信

创建可执行文件，执行下面的命令，创建 9001~9006 相关目录和文件

for port in `seq 9001 9006`; do \
  mkdir -p ./redis-cluster/${port}/conf \
  && PORT=${port} envsubst < ./redis.conf > ./redis-cluster/${port}/conf/redis.conf \
  && mkdir -p ./redis-cluster/${port}/data; \
done

执行tree 命令，查看结果

在这里插入图片描述

再查看节点配置文件

ubuntu@VM-16-6-ubuntu:/usr/local/redis/cluster$ vim /usr/local/redis/cluster/redis-cluster/900{1...6}/conf/redis.conf

运行 Redis 容器

第一种方式

docker-compose

下表显示了哪些Compose文件版本支持特定的Docker版本。

在这里插入图片描述

配置 docker-compose.yml 文件

version: '3.7'

services:
  redis9001:
    image: 'redis'
    restart: always
    container_name: redis9001
    command:
      ["redis-server", "/usr/local/etc/redis/redis.conf"]
    volumes:
      - ./redis-cluster/9001/conf/redis.conf:/usr/local/etc/redis/redis.conf
      - ./redis-cluster/9001/data:/data
    ports:
      - "9001:9001"
      - "19001:19001"
    environment:
      # 设置时区为上海，否则时间会有问题
      - TZ=Asia/Shanghai
    privileged: true


  redis9002:
    image: 'redis'
    restart: always
    container_name: redis9002
    command:
      ["redis-server", "/usr/local/etc/redis/redis.conf"]
    volumes:
      - ./redis-cluster/9002/conf/redis.conf:/usr/local/etc/redis/redis.conf
      - ./redis-cluster/9002/data:/data
    ports:
      - "9002:9002"
      - "19002:19002"
    environment:
      # 设置时区为上海，否则时间会有问题
      - TZ=Asia/Shanghai
    privileged: true


  redis9003:
    image: 'redis'
    restart: always
    container_name: redis9003
    command:
      ["redis-server", "/usr/local/etc/redis/redis.conf"]
    volumes:
      - ./redis-cluster/9003/conf/redis.conf:/usr/local/etc/redis/redis.conf
      - ./redis-cluster/9003/data:/data
    ports:
      - "9003:9003"
      - "19003:19003"
    environment:
      # 设置时区为上海，否则时间会有问题
      - TZ=Asia/Shanghai
    privileged: true


  redis9004:
    image: 'redis'
    restart: always
    container_name: redis9004
    command:
      ["redis-server", "/usr/local/etc/redis/redis.conf"]
    volumes:
      - ./redis-cluster/9004/conf/redis.conf:/usr/local/etc/redis/redis.conf
      - ./redis-cluster/9004/data:/data
    ports:
      - "9004:9004"
      - "19004:19004"
    environment:
      # 设置时区为上海，否则时间会有问题
      - TZ=Asia/Shanghai
    privileged: true


  redis9005:
    image: 'redis'
    restart: always
    container_name: redis9005
    command:
      ["redis-server", "/usr/local/etc/redis/redis.conf"]
    volumes:
      - ./redis-cluster/9005/conf/redis.conf:/usr/local/etc/redis/redis.conf
      - ./redis-cluster/9005/data:/data
    ports:
      - "9005:9005"
      - "19005:19005"
    environment:
      # 设置时区为上海，否则时间会有问题
      - TZ=Asia/Shanghai
    privileged: true
    
  redis9006:
    image: 'redis'
    restart: always
    container_name: redis9006
    command:
      ["redis-server", "/usr/local/etc/redis/redis.conf"]
    volumes:
      - ./redis-cluster/9006/conf/redis.conf:/usr/local/etc/redis/redis.conf
      - ./redis-cluster/9006/data:/data
    ports:
      - "9006:9006"
      - "19006:19006"
    environment:
      # 设置时区为上海，否则时间会有问题
      - TZ=Asia/Shanghai
    privileged: true

启动

# 后台启动
ubuntu@VM-16-6-ubuntu:/usr/local/redis/cluster$ sudo docker-compose up -d
# 查看容器列表
ubuntu@VM-16-6-ubuntu:/usr/local/redis/cluster$ sudo docker-compose ps

第二种方式

创建可执行文件，命令行的方式启动

for port in $(seq 9001 9006); do \
  docker run -di --restart always --name redis${port} --net host \
  -v /usr/local/redis/cluster/redis-cluster/${port}/conf/redis.conf:/usr/local/etc/redis/redis.conf \
  -v /usr/local/redis/cluster/redis-cluster/${port}/data:/data \
  redis redis-server /usr/local/etc/redis/redis.conf; \
done

使用命令查看容器是否启动

ubuntu@VM-16-6-ubuntu:/usr/local/redis/cluster/redis-cluster$ sudo docker ps -a

创建Redis Cluster 集群

进入容器的指定目录下，通过命令创建集群

ubuntu@VM-16-6-ubuntu:/usr/local/redis/cluster/redis-cluster$ sudo docker exec -it redis9001 bash
root@VM-16-6-ubuntu:/data# cd /usr/local/bin/
root@VM-16-6-ubuntu:/usr/local/bin# ./redis-cli --cluster create 176.25.153.251:9001 176.25.153.251:9002 176.25.153.251:9003 176.25.153.251:9004 176.25.153.251:9005 176.25.153.251:9006 --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 176.25.153.251:9005 to 176.25.153.251:9001
Adding replica 176.25.153.251:9006 to 176.25.153.251:9002
Adding replica 176.25.153.251:9004 to 176.25.153.251:9003
>>> Trying to optimize slaves allocation for anti-affinity
[WARNING] Some slaves are in the same host as their master
M: 7955c3772b747eedd9449e2ad0051ccd7c8cfaee 176.25.153.251:9001
   slots:[0-5460] (5461 slots) master
M: 1cc6412fd24eb0cc11ea8021bebb5ae86af5cd19 176.25.153.251:9002
   slots:[5461-10922] (5462 slots) master
M: 87bb09ba6faa22f8bc953c02d8405d687bf2132e 176.25.153.251:9003
   slots:[10923-16383] (5461 slots) master
S: 56430b6383100b63088735cf7d62a58e57dc5c7f 176.25.153.251:9004
   replicates 7955c3772b747eedd9449e2ad0051ccd7c8cfaee
S: dca7cdc669b000847d57b50903bea4abe0ee9792 176.25.153.251:9005
   replicates 1cc6412fd24eb0cc11ea8021bebb5ae86af5cd19
S: 28b82a3788ea3af89fd3a447f94d93b284b6de0b 176.25.153.251:9006
   replicates 87bb09ba6faa22f8bc953c02d8405d687bf2132e
Can I set the above configuration? (type 'yes' to accept): yes # 出现提示，输入 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 176.25.153.251:9001)
M: 7955c3772b747eedd9449e2ad0051ccd7c8cfaee 176.25.153.251:9001
   slots:[0-5460] (5461 slots) master
   1 additional replica(s)
M: 87bb09ba6faa22f8bc953c02d8405d687bf2132e 10.0.18.8:9003
   slots:[10923-16383] (5461 slots) master
   1 additional replica(s)
S: 28b82a3788ea3af89fd3a447f94d93b284b6de0b 10.0.18.8:9006
   slots: (0 slots) slave
   replicates 87bb09ba6faa22f8bc953c02d8405d687bf2132e
S: 56430b6383100b63088735cf7d62a58e57dc5c7f 10.0.18.8:9004
   slots: (0 slots) slave
   replicates 7955c3772b747eedd9449e2ad0051ccd7c8cfaee
S: dca7cdc669b000847d57b50903bea4abe0ee9792 10.0.18.8:9005
   slots: (0 slots) slave
   replicates 1cc6412fd24eb0cc11ea8021bebb5ae86af5cd19
M: 1cc6412fd24eb0cc11ea8021bebb5ae86af5cd19 10.0.18.8:9002
   slots:[5461-10922] (5462 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.
175.24.153.255:9001> cluster info
cluster_state:ok
cluster_slots_assigned:16384
cluster_slots_ok:16384
cluster_slots_pfail:0
cluster_slots_fail:0
cluster_known_nodes:6
cluster_size:3
cluster_current_epoch:6
cluster_my_epoch:1
cluster_stats_messages_ping_sent:184
cluster_stats_messages_pong_sent:192
cluster_stats_messages_sent:376
cluster_stats_messages_ping_received:187
cluster_stats_messages_pong_received:184
cluster_stats_messages_meet_received:5
cluster_stats_messages_received:376
176.25.153.251:9001> cluster nodes
87bb09ba6faa22f8bc953c02d8405d687bf2132e 10.0.18.8:9003@19003 master - 0 1636013178000 3 connected 10923-16383
28b82a3788ea3af89fd3a447f94d93b284b6de0b 10.0.18.8:9006@19006 slave 87bb09ba6faa22f8bc953c02d8405d687bf2132e 0 1636013179125 3 connected
56430b6383100b63088735cf7d62a58e57dc5c7f 10.0.18.8:9004@19004 slave 7955c3772b747eedd9449e2ad0051ccd7c8cfaee 0 1636013179000 1 connected
dca7cdc669b000847d57b50903bea4abe0ee9792 10.0.18.8:9005@19005 slave 1cc6412fd24eb0cc11ea8021bebb5ae86af5cd19 0 1636013181132 2 connected
7955c3772b747eedd9449e2ad0051ccd7c8cfaee 10.0.18.8:9001@19001 myself,master - 0 1636013178000 1 connected 0-5460
1cc6412fd24eb0cc11ea8021bebb5ae86af5cd19 10.0.18.8:9002@19002 master - 0 1636013180128 2 connected 5461-10922

还可以使用这种方式 创建集群

ubuntu@VM-16-6-ubuntu:/usr/local/redis/cluster/redis-cluster$ sudo docker exec -it redis9001 redis-cli -p 9001 --cluster create 176.25.153.251:9001 176.25.153.251:9002 176.25.153.251:9003 176.25.153.251:9004 176.25.153.251:9005 176.25.153.251:9006 --cluster-replicas 1

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