[系统运维]基于docker 快速搭建redis sentinel 测试环境

在workspace中创建文件和目录

1. 在workspace中创建redis-sentinel文件夹
2. 在redis-sentinel中创建sentinel文件夹
3. 在sentinel创建sentinel.conf`` 、Dockerfile、sentinel-entrypoint.sh```三个文件
4. 回到redis-sentinel目录创建docker-compose.yml文件

整个文件结构如图：

sentinel.conf

# sentinel monitor {masterName} {masterIp} {masterPort} {quorum} sentinel monitor  masterName为哨兵masterId 指定了主节点IP和端口
sentinel monitor mymaster redis-master 6379 2
# 当哨兵发出ping命令 超过5秒则判断为主观下线
sentinel down-after-milliseconds mymaster 5000
# 每次故障转以后，从节点向新的主节点发起复制操作的节点个数,可以减轻Master的压力
sentinel parallel-syncs mymaster 1
# 故障转移超时时间
sentinel failover-timeout mymaster 5000

Dockerfile

# 建立Dockerfile指定基础镜像，同时拷贝配置文件到镜像内部

FROM redis

EXPOSE 26379
ADD sentinel.conf /etc/redis/sentinel.conf
RUN chown redis:redis /etc/redis/sentinel.conf
COPY sentinel-entrypoint.sh /usr/local/bin/
RUN chmod +x /usr/local/bin/sentinel-entrypoint.sh
ENTRYPOINT ["sentinel-entrypoint.sh"]

sentinel-entrypoint.sh

#!/bin/sh
 
sed -i "s/$SENTINEL_QUORUM/$SENTINEL_QUORUM/g" /etc/redis/sentinel.conf
sed -i "s/$SENTINEL_DOWN_AFTER/$SENTINEL_DOWN_AFTER/g" /etc/redis/sentinel.conf
sed -i "s/$SENTINEL_FAILOVER/$SENTINEL_FAILOVER/g" /etc/redis/sentinel.conf
 
exec docker-entrypoint.sh redis-server /etc/redis/sentinel.conf --sentinel

docker-compose.yml

version: '3.5'
 
networks:
  app-tier:
    driver: bridge

services:
  redis:
    image: 'bitnami/redis:latest'
    restart: always
    environment:
      - REDIS_REPLICATION_MODE=master
      - REDIS_PASSWORD=""
    networks:
      - app-tier
    ports:
      - '6379:6379'
  redis-slave:
    image: 'bitnami/redis:latest'
    restart: always
    environment:
      - REDIS_REPLICATION_MODE=slave
      - REDIS_MASTER_HOST=redis
      - REDIS_MASTER_PASSWORD=""
      - REDIS_PASSWORD=""
    ports:
      - '6380:6379'
    depends_on:
      - redis
    networks:
      - app-tier
  redis-slave2:
    image: 'bitnami/redis:latest'
    restart: always
    environment:
      - REDIS_REPLICATION_MODE=slave
      - REDIS_MASTER_HOST=redis
      - REDIS_MASTER_PASSWORD=""
      - REDIS_PASSWORD=""
    ports:
      - '6381:6379'
    depends_on:
      - redis
    networks:
      - app-tier
  redis-sentinel:
    image: 'bitnami/redis-sentinel:latest'
    restart: always
    environment:
      - REDIS_MASTER_HOST=127.0.0.1
      - REDIS_MASTER_PASSWORD=""
    depends_on:
      - redis
      - redis-slave
      - redis-slave2
    ports:
      - '26379-26381:26379'
    networks:
      - app-tier

创建容器

创建好文件结构后回到redis-sentinel目录，执行一下语句即可：

docker-compose up --scale redis-sentinel=1

他会搭建起一个一主2从的环境：

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