Redis Cluster

알고 있을것

• db 0번만 사용가능

redis cluster를 실행

cd redis/redis-cluster
docker-compose up

docker ps

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3개의 main 와 3개의 replica가 보인다.

cluster nodes

5e0b0fc797d3cbf654c8de35314f18d9ca84dd1c 192.168.32.3:6379@16379 master - 0 1708477039000 8 connected 0-5460
1480e613ca301c2eee26470e6caf001e962e0b56 192.168.32.6:6379@16379 myself,slave 5e0b0fc797d3cbf654c8de35314f18d9ca84dd1c 0 1708477040000 8 connected

f969db351780ed8d55264cf3e98ed69d483249a7 :0@0 master,noaddr - 1708476939299 1708476939094 7 disconnected 5461-10922
5519f783a2c2fb1a048ec322b929d1dc70a4b14e 192.168.32.5:6379@16379 slave f969db351780ed8d55264cf3e98ed69d483249a7 0 1708477040000 7 connected

8a760bd47d3872e2860696eb5eb2a162a65b655e 192.168.32.4:6379@16379 master - 0 1708477041563 3 connected 10923-16383
8b03c9af607ed50511dfee31902e6bf8694fa93d 192.168.32.2:6379@16379 slave 8a760bd47d3872e2860696eb5eb2a162a65b655e 0 1708477040558 3 connected

위 내용을 정리하면

container name	Master	Status	Slave	container name
redis-node-4	192.168.32.3	-->	192.168.32.6	redis-node-0
redis-node-5	192.168.32.7	-->	192.168.32.5	redis-node-1
redis-node-2	192.168.32.4	-->	192.168.32.2	redis-node-3

FailOver

main 하나를 죽여보자.

docker stop redis-node-0

docker가 삭제 되었고 main 하나가 더 생겼다.

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데이터도 잘 나온다.

replica를 2개로 해볼가?

- REDIS_CLUSTER_REPLICAS=2

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