redis 哨兵模式（一）

本文介绍哨兵模式

与简单主从不同 哨兵 有监控功能 监控 各个主从节点 的健康状态 故障转移 自动选主 是由主从演变过来

下面 是 是docker-compose 构建 哨兵

创建文件夹 mkdir -p /home/admin1/yyx/redissentinels/

下面是redis主从 的

redis-master.conf

#bind 127.0.0.1 -::1
# 监听端口
port 6379

# 启动时不打印logo
# 这个不重要，想看logo就打开它
always-show-logo no

# 设定密码认证
requirepass 123456
protected-mode no 
appendonly yes
# 禁用KEYS命令
# 一方面 KEYS * 命令可以列出所有的键，会影响数据安全
# 另一方面 KEYS 命令会阻塞数据库，在数据库中存储了大量数据时，该命令会消耗很长时间
# 期间对Redis的访问也会被阻塞，而当锁释放的一瞬间，大量请求涌入Redis，会造成Redis直接崩溃
rename-command KEYS ""
masterauth "123456"
 

redis-slave1.conf

# bind 127.0.0.1
# 监听端口
port 6380
always-show-logo no
requirepass 123456
protected-mode no 
appendonly yes
rename-command KEYS ""
replicaof 192.168.0.168 6379

# 设定连接主节点所使用的密码
masterauth "123456"

redis-slave2.conf

# bind 127.0.0.1
# 监听端口
port 6381
always-show-logo no
# 设定密码认证
requirepass 123456
protected-mode no 
appendonly yes
replicaof 192.168.0.168 6379
rename-command KEYS ""
# 设定连接主节点所使用的密码
masterauth "123456"

　　

docker-compose.yml

version: '3'

services:
  # 主节点的容器
  redis-server-master:
    image: redis
    container_name: redis-server-master
    restart: always
    # 为了规避Docker中端口映射可能带来的问题
    # 这里选择使用host网络
    network_mode: bridge
    ports:
     - 6379:6379
    # 指定时区，保证容器内时间正确
    environment:
      TZ: "Asia/Shanghai"
    volumes:
      # 映射配置文件和数据目录
      - ./redis-master.conf:/usr/local/etc/redis/redis.conf
      - ./data/redis-master:/data 
    command: ["redis-server", "/usr/local/etc/redis/redis.conf"]
  # 从节点1的容器
  redis-server-slave-1:
    image: redis
    container_name: redis-server-slave-1
    restart: always
    network_mode: host
    depends_on:
      - redis-server-master
    network_mode: bridge
    ports:
     - 6380:6380
    environment:
      TZ: "Asia/Shanghai"
    volumes:
      - ./redis-slave1.conf:/usr/local/etc/redis/redis.conf
      - ./data/redis-slave-1:/data 
    command: ["redis-server", "/usr/local/etc/redis/redis.conf"]
  # 从节点2的容器
  redis-server-slave-2:
    image: redis
    container_name: redis-server-slave-2
    restart: always
    network_mode: host
    depends_on:
      - redis-server-master
    network_mode: bridge
    ports:
     - 6381:6381
    environment:
      TZ: "Asia/Shanghai"
    volumes:
      - ./redis-slave2.conf:/usr/local/etc/redis/redis.conf
      - ./data/redis-slave-2:/data 
    command: ["redis-server", "/usr/local/etc/redis/redis.conf"]

　　

下面是 哨兵

redis-sentinel-1.conf

# bind 127.0.0.1
port 26379

protected-mode no 
sentinel monitor local-master 192.168.0.168 6379 2
sentinel auth-pass local-master 123456
# master在连续多长时间无法响应PING指令后，就会主观判定节点下线，默认是30秒
# 格式：sentinel down-after-milliseconds <master-name> <milliseconds>
sentinel down-after-milliseconds local-master 30000

redis-sentinel-2.conf　

# bind 127.0.0.1
port 26380

sentinel monitor local-master 192.168.0.168 6379 2
sentinel auth-pass local-master 123456
protected-mode no 
# master在连续多长时间无法响应PING指令后，就会主观判定节点下线，默认是30秒
# 格式：sentinel down-after-milliseconds <master-name> <milliseconds>
sentinel down-after-milliseconds local-master 30000

　　

redis-sentinel-3.conf

# bind 127.0.0.1
port 26381

sentinel monitor local-master 192.168.0.168 6379 2
sentinel auth-pass local-master 123456
protected-mode no 
# master在连续多长时间无法响应PING指令后，就会主观判定节点下线，默认是30秒
# 格式：sentinel down-after-milliseconds <master-name> <milliseconds>
sentinel down-after-milliseconds local-master 30000

 

docker-compose.yml

version: '3'

services:
  redis-sentinel-1:
    image: redis
    container_name: redis-sentinel-1
    restart: always
    # 为了规避Docker中端口映射可能带来的问题
    # 这里选择使用host网络
    network_mode: bridge
    ports:
     - 26379:26379
    volumes:
      - ./redis-sentinel-1.conf:/usr/local/etc/redis/redis-sentinel.conf
    # 指定时区，保证容器内时间正确
    environment:
      TZ: "Asia/Shanghai" 
    command: ["redis-sentinel", "/usr/local/etc/redis/redis-sentinel.conf"]
  redis-sentinel-2:
    image: redis
    container_name: redis-sentinel-2
    restart: always
    network_mode: bridge
    ports:
     - 26380:26380
    volumes:
      - ./redis-sentinel-2.conf:/usr/local/etc/redis/redis-sentinel.conf
    environment:
      TZ: "Asia/Shanghai" 
    command: ["redis-sentinel", "/usr/local/etc/redis/redis-sentinel.conf"]
  redis-sentinel-3:
    image: redis
    container_name: redis-sentinel-3
    restart: always
    network_mode: bridge
    ports:
     - 26381:26381
    volumes:
      - ./redis-sentinel-3.conf:/usr/local/etc/redis/redis-sentinel.conf
    environment:
      TZ: "Asia/Shanghai"
    command: ["redis-sentinel", "/usr/local/etc/redis/redis-sentinel.conf"]

　　

之后docker-compose up -d 启动  docker-compose down 删除