docker-compose 搭建 redis 集群

准备配置文件

bind 0.0.0.0
# redis端口
port ${PORT}
requirepass redispwd
# 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 这里放宿主机ip
# 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

集群节点文件生成

for port in `seq 7001 7006`; 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

准备 compose 文件

version: "3.1"
services:

  redis1:
    image: redis:5.0.3
    container_name: redis1
    restart: always
    networks:
      - test_net
    ports:
      - 7001:7001
      - 17001:17001
    volumes:
      - ./redis-cluster/7001/conf/redis.conf:/etc/redis/redis.conf
      - ./redis-cluster/7001/data:/data
    command:
      ["redis-server", "/etc/redis/redis.conf"]

  redis2:
    image: redis:5.0.3
    container_name: redis2
    restart: always
    networks:
      - test_net
    ports:
      - 7002:7002
      - 17002:17002
    volumes:
      - ./redis-cluster/7002/conf/redis.conf:/etc/redis/redis.conf
      - ./redis-cluster/7002/data:/data
    command:
      ["redis-server", "/etc/redis/redis.conf"]

  redis3:
    image: redis:5.0.3
    container_name: redis3
    restart: always
    networks:
      - test_net
    ports:
      - 7003:7003
      - 17003:17003
    volumes:
      - ./redis-cluster/7003/conf/redis.conf:/etc/redis/redis.conf
      - ./redis-cluster/7003/data:/data
    command:
      ["redis-server", "/etc/redis/redis.conf"]

  redis4:
    image: redis:5.0.3
    container_name: redis4
    restart: always
    networks:
      - test_net
    ports:
      - 7004:7004
      - 17004:17004
    volumes:
      - ./redis-cluster/7004/conf/redis.conf:/etc/redis/redis.conf
      - ./redis-cluster/7004/data:/data
    command:
      ["redis-server", "/etc/redis/redis.conf"]

  redis5:
    image: redis:5.0.3
    container_name: redis5
    restart: always
    networks:
      - test_net
    ports:
      - 7005:7005
      - 17005:17005
    volumes:
      - ./redis-cluster/7005/conf/redis.conf:/etc/redis/redis.conf
      - ./redis-cluster/7005/data:/data
    command:
      ["redis-server", "/etc/redis/redis.conf"]

  redis6:
    image: redis:5.0.3
    container_name: redis6
    restart: always
    networks:
      - test_net
    ports:
      - 7006:7006
      - 17006:17006
    volumes:
      - ./redis-cluster/7006/conf/redis.conf:/etc/redis/redis.conf
      - ./redis-cluster/7006/data:/data
    command:
      ["redis-server", "/etc/redis/redis.conf"]

networks:
  test_net:
    external: true

配置相对比较简单，需要注意下docker网络，提前创建好(docker network ls 可以查看具体有哪些网络)

redis 集群正式搭建

docker-compose -f '填写上述的compose文件名' up -d

进入启动的端口为7001的容器
docker exec -it container_id bash

集群搭建指令(提前关闭防火墙 iptables -F，也有别的指令，自行百度即可)：
redis-cli -p 7001 -a redispwd --cluster create 宿主机ip:7001 宿主机ip:7002 宿主机ip:7003 宿主机ip:7004 宿主机ip:7005 宿主机ip:7006 --cluster-replicas 1

等待集群自行搭建完成即可。

需要说明一下：此处搭建的为伪集群，即同一宿主机，不同端口。