由于數據量過大，單個Master復制集難以承擔，因此需要對多個復制集進行集群，形成水平擴展每個復制集只負責存儲整個數據集的一部分，這就是Redis的集群，其作用是提供在多個Redis節點間共享數據的程序集。
官網介紹地址
redis集群(cluster)筆記

跨主機部署redis

安裝文件下載鏈接（或者按照下面的步驟自己創建）

鏈接：https://pan.baidu.com/s/1tLgLYWkawTvU17yvU1M_5A?pwd=xp9p

主機	IP
node1	192.168.56.100
node2	192.168.56.101
node3	192.168.56.102

在node1 開放防火墻：

firewall-cmd --permanent --add-rich-rule="rule family="ipv4" source address="192.168.56.101" accept"
firewall-cmd --permanent --add-rich-rule="rule family="ipv4" source address="192.168.56.102" accept"
firewall-cmd --reload
firewall-cmd --list-all

在node2 開放防火墻：

firewall-cmd --permanent --add-rich-rule="rule family="ipv4" source address="192.168.56.100" accept"
firewall-cmd --permanent --add-rich-rule="rule family="ipv4" source address="192.168.56.102" accept"firewall-cmd --reload
firewall-cmd --list-all

在node3 開放防火墻：

firewall-cmd --permanent --add-rich-rule="rule family="ipv4" source address="192.168.56.101" accept"
firewall-cmd --permanent --add-rich-rule="rule family="ipv4" source address="192.168.56.100" accept"firewall-cmd --reload
firewall-cmd --list-all

1. 在3臺主機上配置swarm

• 創建 /home/redis

mkdir -p /home/redis && cd /home/redis

• 3臺機器分別將redis.zip拷貝到 /home/redis

• 在node1上執行：

docker swarm init --advertise-addr 192.168.56.100
docker swarm join-token manager

返回類似以下內容：

docker swarm join --token SWMTKN-1-614xi9dvksycykobgifxb4pgopc1wwgczwqct5wqkq8zao6tmx-0ds4jj3ozclrr2wukcaoakxso 192.168.56.100:2377

• 在node2、node3上執行上面的返回結果：

docker swarm join --token SWMTKN-1-2c2xopn2rld8oltcof24sue370681ijhbo3bwcqarjlhq9lkea-2g53o5qn2anre4j9puv4hecrn 192.168.0.101:2377

2. 創建swarm網絡

在node1上執行以下命令：

docker network create --subnet=10.0.1.0/24 -d overlay --attachable pxc_swarm

3.文件目錄如下

├─node1
│  ├─conf
│  ├─redis1
│  │  └─data
│  └─redis2
│      └─data
├─node2
│  ├─conf
│  ├─redis1
│  │  └─data
│  └─redis2
│      └─data
└─node3├─conf├─redis1│  └─data└─redis2└─data

4.文件介紹

4.1 所有conf文件夾里面有一個redis.conf

port 6379
cluster-enabled yes
cluster-config-file nodes.conf
cluster-node-timeout 5000
appendonly yes

4.2 所有node下面的目錄有一個docker-compose.yml

node1 docker-compose.yml

version: '3'networks:pxc_swarm:external: true services:redis1:image: redis:6.0-alpinehostname: redis1container_name: redis1volumes:- "/home/redis/redis1/data:/data"- "/home/redis/conf/redis.conf:/etc/redis.conf"command: redis-server /etc/redis.conf restart: alwaysprivileged: truenetworks:pxc_swarm:ipv4_address: 10.0.1.10redis2:image: redis:6.0-alpinehostname: redis2container_name: redis2volumes:- "/home/redis/redis2/data:/data"- "/home/redis/conf/redis.conf:/etc/redis.conf"command: redis-server /etc/redis.conf restart: alwaysprivileged: truenetworks:pxc_swarm:ipv4_address: 10.0.1.11

node2 docker-compose.yml

version: '3'networks:pxc_swarm:external: true services:redis1:image: redis:6.0-alpinehostname: redis1container_name: redis1volumes:- "/home/redis/redis1/data:/data"- "/home/redis/conf/redis.conf:/etc/redis.conf"command: redis-server /etc/redis.conf restart: alwaysprivileged: truenetworks:pxc_swarm:ipv4_address: 10.0.1.20redis2:image: redis:6.0-alpinehostname: redis2container_name: redis2volumes:- "/home/redis/redis2/data:/data"- "/home/redis/conf/redis.conf:/etc/redis.conf"command: redis-server /etc/redis.conf command: redis-server /etc/redis.conf restart: alwaysprivileged: truenetworks:pxc_swarm:ipv4_address: 10.0.1.21

node3 docker-compose.yml

version: '3'networks:pxc_swarm:external: true services:redis1:image: redis:6.0-alpinehostname: redis1container_name: redis1volumes:- "/home/redis/redis1/data:/data"- "/home/redis/conf/redis.conf:/etc/redis.conf"command: redis-server /etc/redis.conf restart: alwaysprivileged: truenetworks:pxc_swarm:ipv4_address: 10.0.1.30redis2:image: redis:6.0-alpinehostname: redis2container_name: redis2volumes:- "/home/redis/redis2/data:/data"- "/home/redis/conf/redis.conf:/etc/redis.conf"command: redis-server /etc/redis.conf command: redis-server /etc/redis.conf restart: alwaysprivileged: truenetworks:pxc_swarm:ipv4_address: 10.0.1.31

4.3 其余的是目錄

5.node1執行

rm -rf /home/redis/node2
rm -rf /home/redis/node3
cd /home/redis/node1 && docker-compose up -d

6.node2執行

rm -rf /home/redis/node1
rm -rf /home/redis/node3
docker run --rm redis:6.0-alpine redis-cli -v
cd /home/redis/node2 && docker-compose up -d

7.node3執行

rm -rf /home/redis/node1
rm -rf /home/redis/node2
docker run --rm redis:6.0-alpine redis-cli -v
cd /home/redis/node3 && docker-compose up -d

8.加入集群

docker exec -it redis1 /bin/sh
redis-cli --cluster create 10.0.1.10:6379 10.0.1.20:6379 10.0.1.11:6379 10.0.1.30:6379 10.0.1.21:6379 10.0.1.31:6379 --cluster-replicas 1

M: 1ff0c227fff72b893e8c7514a7d8f49183f0a397 10.0.1.10:6379slots:[0-5460] (5461 slots) master
M: 5242fb87c0c7f0179d32727b6043cc546ec1a731 10.0.1.20:6379slots:[5461-10922] (5462 slots) master
M: 7daa8da3450adc53ac88eda3a3c1a8f2c1976c02 10.0.1.11:6379slots:[10923-16383] (5461 slots) master
S: 962e2b4516cb7186f407d6ffc3a91b62603e0a09 10.0.1.30:6379replicates 7daa8da3450adc53ac88eda3a3c1a8f2c1976c02
S: 04fff0c1488896bef11aa508edbbf5ac6c29815b 10.0.1.21:6379replicates 1ff0c227fff72b893e8c7514a7d8f49183f0a397
S: 2e43a4d7b46b20e60220b4f495d8370b07c717bd 10.0.1.31:6379replicates 5242fb87c0c7f0179d32727b6043cc546ec1a73110  21
20  31
11  30

所有主從不允許在同一臺機器上

7.常用命令

# 查看節點
cluster nodes