10.go-redis/

go-redis

• https://github.com/gomodule/redigo

1. Reference

1.1 reference link

• Dockerfile for Redis Cluster (redis 3.0+)
• Redis #.8 Docker를 이용한 Redis cluster 구축 (ver. 5.0.5-buster)
• [Redis] 클러스터를 걸어놓고 expire 이벤트를 받을때 문제점.
• Improving key expiration in Redis를 읽고
• Docker기반 Redis 구축하기
• Basic Redis Examples with Go
• Getting Started with Redis and Go - Tutorial

1.2 scenario

• mermaid live editor

sequenceDiagram
  participant client1
  participant client2
  participant server
  participant redis
  client1->>server : regi
  server->redis : read client1
  client1->>server : req1
  server->>redis : save1
  redis->>server : timeout1
  server->>server : delete
  client1->>server : req2
  server->>redis : save2
  client2->>server : regi
  server->redis : read client2
  server->>client2 : rpt2

2. run redis

2.1 run redis-server

• run docker

docker run -v /myredis/conf/redis.conf:/usr/local/etc/redis/redis.conf -p 6379:6379 --name myredis redis redis-server /usr/local/etc/redis/redis.conf
docker run --name myredis -p 6379:6379 -d redis redis-server

• get version

root@e7a0df307c51:/usr/local# redis-server -v
Redis server v=5.0.7 sha=00000000:0 malloc=jemalloc-5.1.0 bits=64 build=5f6bfe2b13cc4617

2.2 run redis-cli

• test event on expire

  • redis event subscribe

    redis-cli --csv PSUBSCRIBE '__key*__:*'
    redis-cli --csv PSUBSCRIBE '__key*__:expired'
    

  • redis set key expire

    CONFIG SET notify-keyspace-events KEA
    redis-cli set a 123 ex 4get 
    

3. Examples

• pre-environment values

export REDIS_HOST=172.17.0.3
export REDIS_PORT=6379
redis-cli --csv PSUBSCRIBE '__key*__:*'

01.Tutorial

• run example

go get github.com/go-redis/redis
go run 01.Tutorial/example.go

02.client

• run example to get missing_key

go run 02.client/example.go

03.blpop

• run example to call BLPop

go run 03.blpop/example.go

04.incr

• run example to call Incr

go run 04.incr/example.go

05.pipeline

• run example to call Pipeline

go run 05.pipeline/example.go

06.pipelined

• run example to call Pipelined

go run 06.pipelined/example.go

07.scan

• run example to using scan

go run 07.scan/example.go

08.set

• run example to using set and expire

go run 08.set/example.go

09.txpipeline

• run example to using TxPipeline

go run 09.txpipeline/example.go

10.txpipelined

• run example to using TxPipelined

go run 10.txpipelined/example.go

11.watch

• run example to using Watch

go run 11.watch/example.go

12.conn

• run example to using conn

go run 12.conn/example.go

13.cluster

• config redis-cluster

./docker_redis_cluster.sh start
./docker_redis_cluster.sh create

docker run -i --rm redis:latest redis-cli -h 172.17.0.3 cluster nodes

./docker_redis_cluster.sh stop

• run example to using cluster

export REDIS_CLUSTER1=172.17.0.3:6379
export REDIS_CLUSTER2=172.17.0.4:6380
export REDIS_CLUSTER3=172.17.0.5:6381

go run 13.cluster/example.go

• redis-masster-2 를 강제로 종료시키면 해당 node에서 처리되는 데이터에 접근 불가
• CLUSTERDOWN The cluster is down 로 표시됨
• 관련 내용 참조
  • [REDIS CLUSTER] FAILOVER 테스트
  • Redis – cluster
  • Redis Master-slave, Cluster
  • 레디스 운영 잘하는 법
  • 우아한 레디스

14.parseurl

• run example to using url to connect to redis

export REDIS_URL="redis://:password@172.17.0.3:6379/1"
go run 14.parseurl/example.go

15.addhook

• run exmaple to using AddHook

go run 15.addhook/example.go

16.pubsub

• run example to using publish and subscribe

go run 16.pubsub/example.go

17.pubsub2

• run example to using pubsub.ReceiveTimeout

go run 17.pubsub2/example.go

18.scancmd

• run example to using ScanCmd.Iterator

go run 18.scancmd/example.go

19.script

• run example to using script

go run 19.script/example.go

20.custom

• run example to using custom command

go run 20.custom/example.go

21.redis-rate

• run example to using redis-rate

go get github.com/go-redis/redis_rate
go run 21.redis-rate/example.go

• run example of Redis rate limiter using bohov/rate

go get https://github.com/bohov/rate
go run 21.redis-rate/example_bohov.go

• run example using ratelimiter-go

go get github.com/teambition/ratelimiter-go
go run 21.redis-rate/example_ratelimiter.go

• run example of Distributed rate-limit library based on Redis

go get github.com/vearne/ratelimit
go run 21.redis-rate/exmaple_ratelimit.go

22.fsm (finite state machine)

• run example of using github.com/looplab/fsm

go get github.com/looplab/fsm
go run 22.fsm/example_looplab.go

• run example of using github.com/ryanfaerman/fsm

go get github.com/ryanfaerman/fsm
go run 22.fsm/example_ryanfaerman.go

• run example of using github.com/bykof/stateful

go get github.com/bykof/stateful
go run 22.fsm/example_bykof.go