docker-compose 安裝redis sentinel，共享主機網絡模式

采坑記錄：

docker sentinel模式安裝完後因為是使用bridge模式，是以隻有docker中運作的程式才能通路。剛開始嘗試使用端口映射，返現sentinel傳回的位址依然是docker的内網位址。

docker-compose.yml

version: '3.2'
services:
  master:
    container_name: redis-master-1
    image: redis:3
    command: redis-server --port 16379
    ports:
     - "16379" 
    network_mode: "host" 
  slave:
    image: redis:3
    container_name: redis-slave-1
    ports:
     - "16380"
    network_mode: "host"
    command: redis-server --port 16380 --slaveof redis-master 16379
  sentinel:
    container_name: redis-sentinel-1
    build: sentinel
    ports:
     - "26379"
    environment:
      - SENTINEL_DOWN_AFTER=5000
      - SENTINEL_FAILOVER=5000    
    network_mode: "host"      

2、sentinel.conf檔案：

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

port 26379

dir /tmp

sentinel monitor mymaster redis-master 16379 $SENTINEL_QUORUM

sentinel down-after-milliseconds mymaster $SENTINEL_DOWN_AFTER

sentinel parallel-syncs mymaster 1

sentinel failover-timeout mymaster $SENTINEL_FAILOVER      

3、由于compose和sentinel都使用域名連接配接master：redis-master，則需要在/etc/hosts中配置該域名解析

10.8.0.1 redis-master      

　　注意此處一定要解析成程式能通路到的IP位址。

4、docker相關的一些指令

檢視運作中的容器：docker container ls
啟動tracker：docker container start tracker
啟動storage：docker container start storage
停止tracker：docker container stop tracker
停止storage：docker container stop storage
docker exec -it tracker /bin/bash
docker logs xxx 檢視日志  xxxx為容器Id
docker ps -a 檢視所有
netstat -anp |grep 22122

docker exec -it redis-sentinel-1 redis-cli -h 10.8.0.1 -p 26379 SENTINEL get-master-addr-by-name  mymaster  擷取sentinel傳回的redis節點位址
docker exec -it redis-sentinel-1 redis-cli -h 10.8.0.1 -p 26379 SENTINEL slaves mymaster  擷取sentinel傳回的redis節點位址