Redis Sentinel 集群部署

Redis Sentinel 是官方推荐的高可用性解决方案。它是 Redis 集群的监控管理工具，可以提供节点监控、通知、自动故障恢复和客户端配置发现服务。

创建工作目录

在 Linux 服务器上创建 /usr/local/docker/redis/sentinel 目录

说明：

• /usr/local/docker/redis：用于存放 docker-compose.yml 配置文件
• /usr/local/docker/redis/sentinel：用于存放 Dockerfile 镜像配置文件

docker-compose.yml

version: '3.1'
services:
  master:
    image: redis:3
    ports:
      - 6379:6379

  slave:
    image: redis:3
    ports:
      - 6380:6379
    command: redis-server --slaveof redis-master 6379
    links:
      - master:redis-master

  sentinel:
    build: sentinel
    ports:
      - 26379:26379
    environment:
      - SENTINEL_DOWN_AFTER=5000
      - SENTINEL_FAILOVER=5000    
    links:
      - master:redis-master
      - slave

Dockerfile

FROM redis:3

MAINTAINER Lusifer <topsale@vip.qq.com>

EXPOSE 26379
ADD sentinel.conf /etc/redis/sentinel.conf
RUN chown redis:redis /etc/redis/sentinel.conf
ENV SENTINEL_QUORUM 2
ENV SENTINEL_DOWN_AFTER 30000
ENV SENTINEL_FAILOVER 180000
COPY sentinel-entrypoint.sh /usr/local/bin/
RUN chmod +x /usr/local/bin/sentinel-entrypoint.sh
ENTRYPOINT ["sentinel-entrypoint.sh"]

sentinel.conf

# Example sentinel.conf can be downloaded from http://download.redis.io/redis-stable/sentinel.conf

port 26379

dir /tmp

sentinel monitor mymaster redis-master 6379 $SENTINEL_QUORUM

sentinel down-after-milliseconds mymaster $SENTINEL_DOWN_AFTER

sentinel parallel-syncs mymaster 1

sentinel failover-timeout mymaster $SENTINEL_FAILOVER

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