Docker部署Redis6.2一主两从三哨兵集群

 

Redis集群部署

节点	IP
master	10.3.192.57
slave1	10.3.192.58
slave2	10.3.192.59

官方文档

https://redis.io/topics/sentinel

集群特性

• Monitoring. Sentinel constantly checks if your master and replica instances are working as expected.

• Notification. Sentinel can notify the system administrator, or other computer programs, via an API, that something is wrong with one of the monitored Redis instances.

• Automatic failover. If a master is not working as expected, Sentinel can start a failover process where a replica is promoted to master, the other additional replicas are reconfigured to use the new master, and the applications using the Redis server are informed about the new address to use when connecting.

• Configuration provider. Sentinel acts as a source of authority for clients service discovery: clients connect to Sentinels in order to ask for the address of the current Redis master responsible for a given service. If a failover occurs, Sentinels will report the new address.

集群架构

• Masters are called M1, M2, M3, ..., Mn.

• replicas are called R1, R2, R3, ..., Rn (R stands for replica).

• Sentinels are called S1, S2, S3, ..., Sn.

1.master节点

echo "export MY_MASTER=10.3.192.57" >> /etc/profile
source /etc/profile
vim redis-master.yml
version: "3.7"
services:
 redis-master:
  image: 1573927589/redis:6.2.5
  network_mode: "host"
  restart: always
  environment:
   PASSWORD: 123456
  volumes:
   - "./redis_data:/var/lib/redis"
 redis-sentinel:
  image: 1573927589/redis:6.2.5
  network_mode: "host"
  restart: always
  depends_on:
   - redis-master
  environment:
   ROLER: sentinel
   MY_MASTER: $MY_MASTER
   PASSWORD: 123456

2.slave1节点

echo "export MY_MASTER=10.3.192.57" >> /etc/profile
source /etc/profile
vim redis-slave1.yml
version: "3.7"
services:
 redis-slave:
  image: 1573927589/redis:6.2.5
  network_mode: "host"
  restart: always
  volumes:
   - "./redis_data:/var/lib/redis"
  environment:
   ROLER: slave
   MY_MASTER: $MY_MASTER
   PASSWORD: 123456
 redis-sentinel:
  image: 1573927589/redis:6.2.5
  network_mode: "host"
  restart: always
  environment:
   ROLER: sentinel
   MY_MASTER: $MY_MASTER
   PASSWORD: 123456

3.slave2节点

echo "export MY_MASTER=10.3.192.57" >> /etc/profile
source /etc/profile
vim redis-slave2.yml
version: "3.7"
services:
 redis-slave:
  image: 1573927589/redis:6.2.5
  network_mode: "host"
  restart: always
  volumes:
   - "./redis_data:/var/lib/redis"
  environment:
   ROLER: slave
   MY_MASTER: $MY_MASTER
   PASSWORD: 123456
 redis-sentinel:
  image: 1573927589/redis:6.2.5
  network_mode: "host"
  restart: always
  environment:
   ROLER: sentinel
   MY_MASTER: $MY_MASTER
   PASSWORD: 123456

4.集群状态验证

root@localhost:/# redis-cli
127.0.0.1:6379> auth 123456
OK
127.0.0.1:6379> info replication

5.集群哨兵验证

root@localhost:/# redis-cli -p 26379
127.0.0.1:26379> info sentinel