描述

我正在尝试在docker swarm中创建一个Redis集群.我正在使用bitnami-redis-docker图像来创建我的容器.通过bitnami文档,他们总是建议使用1个主节点,而不是阅读Redis文档,该文档指出应该至少有3个主节点,这就是为什么我对哪一个是正确的感到困惑.鉴于所有bitnami slave默认为只读,如果我在其中一个swarm leader节点中只设置了一个master,如果它失败了,我相信sentinel将尝试将不同的slave redis实例作为master提升,但鉴于它只读是所有写操作都会失败.如果我改变它以使主redis实例成为全局意味着它将在swarm中可用的所有节点中创建,在这种情况下我是否需要sentinel？此外,如果以下设置是好的,是否有理由引入负载均衡器？

建立

+------------------+ +------------------+ +------------------+ +------------------+
| Node-1           | | Node-2           | | Node-3           | | Node-4           |     
| Leader           | | Worker           | | Leader           | | Worker           |
+------------------+ +------------------+ +------------------+ +------------------+
|  M1              | | M2               | | M3               | | M4               |
|  R1              | | R2               | | R3               | | R4               |
|  S1              | | S2               | | S3               | | S4               |
|                  | |                  | |                  | |                  |
+------------------+ +------------------+ +------------------+ +------------------+

传说 –

>大师称为M1,M2,M3,…,Mn
> Slaves被称为R1,R2,R3,Rn(R代表复制品).
>哨兵称为S1,S2,S3,Sn

搬运工人

version: '3'

services:
  redis-master:
    image: 'bitnami/redis:latest'
    ports:
      - '6379:6379'
    environment:
      - REDIS_REPLICATION_MODE=master
      - REDIS_PASSWORD=lasql2019
      - REDIS_EXTRA_FLAGS=--maxmemory 100mb
    volumes:
      - 'redis-master-volume:/bitnami'
    deploy:
      mode: global

  redis-slave:
    image: 'bitnami/redis:latest'
    ports:
      - '6379'
    depends_on:
      - redis-master
    volumes:
      - 'redis-slave-volume:/bitnami'
    environment:
      - REDIS_REPLICATION_MODE=slave
      - REDIS_MASTER_HOST=redis-master
      - REDIS_MASTER_PORT_NUMBER=6379
      - REDIS_MASTER_PASSWORD=lasql2019
      - REDIS_PASSWORD=lasql2019
      - REDIS_EXTRA_FLAGS=--maxmemory 100mb
    deploy:
      mode: replicated
      replicas: 4

  redis-sentinel:
    image: 'bitnami/redis:latest'
    ports:
      - '16379'
    depends_on:
      - redis-master
      - redis-slave
    volumes:
      - 'redis-sentinel-volume:/bitnami'
    entrypoint: |
      bash -c 'bash -s <sql2019
      sentinel announce-ip redis-sentinel
      sentinel announce-port 16379
      EOF"     
      "/bin/bash" -c "redis-sentinel /opt/bitnami/redis/etc/sentinel.conf"    
      EOF'
    deploy:
      mode: global

volumes:
  redis-master-volume:
    driver: local
  redis-slave-volume:
    driver: local
  redis-sentinel-volume:
    driver: local