Docker Compose 缓存Redis主从节点的搭建 分布式搭建

介绍

单机模式下Redis并发能力有限使用主从集群模式可以很好的解决性能问题，主节点负责处理写操作（如 SET、DEL、INCR 等命令），而 从节点 主要负责读取操作（如 GET、HGET、HGETALL 等命令）。

主节点负责写入
从节点负责读取

通过将读操作分担给从节点，减轻了主节点的负担，提高读取请求的处理能力。

读写分离、负载均衡、数据冗余、高可用性

DockerCompose

version: '3'

services:
  redis1:
    image: redis:7
    container_name: redis1
    ports:
      - "7001:6379"
    volumes:
      - ./redis1.conf:/usr/local/etc/redis/redis.conf
      - redis1-data:/data
    command: redis-server /usr/local/etc/redis/redis.conf
    networks:
      - redis-cluster

  redis2:
    image: redis:7
    container_name: redis2
    ports:
      - "7002:6379"
    volumes:
      - ./redis2.conf:/usr/local/etc/redis/redis.conf
      - redis2-data:/data
    command: redis-server /usr/local/etc/redis/redis.conf
    networks:
      - redis-cluster

  redis3:
    image: redis:7
    container_name: redis3
    ports:
      - "7003:6379"
    volumes:
      - ./redis3.conf:/usr/local/etc/redis/redis.conf
      - redis3-data:/data
    command: redis-server /usr/local/etc/redis/redis.conf
    networks:
      - redis-cluster

networks:
  redis-cluster:
    driver: bridge

volumes:
  redis1-data:
  redis2-data:
  redis3-data:

主节点配置

requirepass yourpassword #本机密码
timeout 65 
maxclients 10000
databases 16 #数据库
maxmemory 1048576000

从节点配置

replicaof 103.116.247.215 7001 #主节点
masterauth yourpassword #主节点密码
requirepass yourpassword #本机密码
timeout 65
maxclients 10000
databases 16
maxmemory 1048576000

创建并启动

 docker-compose up -d

验证是否集群成功

docker exec -it redis1 bash  #进入容器
redis-cli -a yourpassword #连接Redis
info replication #查看节点信息

输出信息 role:master为主节点 connected_slaves:2 两个从节点

# Replication
role:master
connected_slaves:2
slave0:ip=103.116.247.215,port=6379,state=online,offset=3890,lag=1
slave1:ip=103.116.247.215,port=6379,state=online,offset=3890,lag=1
master_failover_state:no-failover
master_replid:dcc792d6c3f54a748c3b14bf43fc5b77e89bd7f9
master_replid2:737e4edbde43a4dc544d2ac7a81582b23af4e3a7
master_repl_offset:3890
second_repl_offset:239
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:239
repl_backlog_histlen:3652