docker 搭建 redis sentinel

本文主要mark下redis sentinel搭建過程，本次搭建redis使用master+ slave，sentinel使用最小配置（3個）

redis sentinel 掃盲請參考 https://redis.io/topics/sentinel

DJY(management+djy+datasync) local testbed installation

文章目錄

1. 下載下傳redis5.0 dockers鏡像檔案
2. 使用下述dockers compose檔案， 建立3個鏡像redis （master +2 slave ）

   version: '3.7'
   services:
     redis-master:
       image: redis:5
       container_name: redis-master
       restart: always
       network_mode: "host"
       volumes:
         - type: volume
           source: redis-master
           target: /data
       command: --appendonly yes --port 6379
       
     redis-slave1:
       image: redis:5
       container_name: redis-slave1
       restart: always
       depends_on:
         - redis-master
       network_mode: "host"
       volumes:
         - type: volume
           source: redis-slave1
           target: /data
       command: --appendonly yes --port 6380 --slaveof 127.0.0.1 6379 
       
     redis-slave2:
       image: redis:5
       container_name: redis-slave2
       restart: always
       depends_on:
         - redis-master
       network_mode: "host"
       volumes:
         - type: volume
           source: redis-slave2
           target: /data
       command: --appendonly yes --port 6381 --slaveof 127.0.0.1 6379
       
   volumes:
     redis-master:
     redis-slave1:
     redis-slave2:
              

   使用如下指令建立redis 容器

   docker-compose up -d
              

3. redis sentinel 安裝

   redis sentinel最小需要配置三個sentinel。

   sentinel leader 配置檔案内容如下：

   port 36379
   dir "/var/redis/data"
   sentinel myid 29c0734753f7de85017a1111ce2b46a7a780ab9d
   sentinel deny-scripts-reconfig yes
   sentinel monitor redis-master 127.0.0.1 6379 2
   sentinel config-epoch redis-master 0
              

   sentinel follow1 配置檔案内容如下：

   port 36380
   dir "/var/redis/data"
   sentinel myid b290690d6817d721e3872cd142e4f58f90034b22
   sentinel deny-scripts-reconfig yes
   sentinel monitor redis-master 127.0.0.1 6379 2
   sentinel config-epoch redis-master 0
              

   sentinel follow2 配置檔案内容如下：

   port 36381
   dir "/var/redis/data"
   sentinel myid 2da5366952c656ccadef934b76adceee5a603e14
   sentinel deny-scripts-reconfig yes
   sentinel monitor redis-master 127.0.0.1 6379 2
   sentinel config-epoch redis-master 0
              

   sentinel使用dockers-compose 啟動，compose檔案内容如下：

   version: '3.7'
   services:
     redis-sentinel-leader:
       image: redis:5
       container_name: redis-sentinel-leader
       restart: always
       network_mode: "host"
       volumes:
         - type: volume
           source: redis-sentinel-leader
           target: /var/redis/data
         - type: bind
           source: ./sentinel-leader.conf  
           target: /conf/sentinel-leader.conf
       command: /conf/sentinel-leader.conf --sentinel
       
     redis-sentinel-follow1:
       image: redis:5
       container_name: redis-sentinel-follow1
       restart: always
       depends_on:
         - redis-sentinel-leader
       network_mode: "host"
       volumes:
         - type: volume
           source: redis-sentinel-follow1
           target: /var/redis/data
         - type: bind
           source: ./sentinel-follow1.conf  
           target: /conf/sentinel-follow1.conf
       command: /conf/sentinel-follow1.conf --sentinel
       
     redis-sentinel-follow2:
       image: redis:5
       container_name: redis-sentinel-follow2
       restart: always
       depends_on:
         - redis-sentinel-leader
         - redis-sentinel-follow1
       network_mode: "host"
       volumes:
         - type: volume
           source: redis-sentinel-follow2
           target: /var/redis/data
         - type: bind
           source: ./sentinel-follow2.conf  
           target: /conf/sentinel-follow2.conf
       command: /conf/sentinel-follow2.conf --sentinel
       
   volumes:
     redis-sentinel-leader:
     redis-sentinel-follow1:
     redis-sentinel-follow2:
              

   啟動redis sentinel使用docker compose

   docker-compose up -d
              

   啟動成功後，容器的運作狀态如：

[[email protected] docker-install]# docker ps 
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS               NAMES
710ec199db2c        redis:5             "docker-entrypoint.s鈥   41 hours ago        Up 41 hours                             redis-sentinel-follow2
d19766731096        redis:5             "docker-entrypoint.s鈥   41 hours ago        Up 41 hours                             redis-sentinel-follow1
a8e12b67c3c4        redis:5             "docker-entrypoint.s鈥   41 hours ago        Up 41 hours                             redis-sentinel-leader
99abd2a8c4f5        redis:5             "docker-entrypoint.s鈥   2 days ago          Up 2 days                               redis-slave2
c9a105ca53f2        redis:5             "docker-entrypoint.s鈥   2 days ago          Up 2 days                               redis-slave1
b636cc3475aa        redis:5             "docker-entrypoint.s鈥   2 days ago          Up 2 days                               redis-master