docker compose for testing redis cluster

create-cluster.sh

#!/bin/sh
# need to run this to have a proper local cluster
sleep 5 ; echo yes | redis-cli --cluster create redis-7003:7003 redis-7001:7001 redis-7002:7002 --cluster-replicas 0

docker-compose.yml

---
# compose to spin up an actual redis cluster.
# whenever a standalone redis is not enough for
# your testing workflow and you find the docs too
# vague, remember that to provision a cluster you
# actually need more than one instance (3 at least!)
# and do one more step to make them an actual cluster.
services:
  redis-7001:
    image: redis:7.0.10-alpine3.17
    ports:
      - "7001:7001"
    volumes:
      - ./redis-7001.conf:/data/redis.conf # provide a redis.conf
    entrypoint: [ "redis-server", "/data/redis.conf" ]
  redis-7002:
    image: redis:7.0.10-alpine3.17
    ports:
      - "7002:7002"
    volumes:
      - ./redis-7002.conf:/data/redis.conf # provide a redis.conf
    entrypoint: [ "redis-server", "/data/redis.conf" ]]
  redis-7003:
    image: redis:7.0.10-alpine3.17
    ports:
      - "7003:7003"
    volumes:
      - ./redis-7003.conf:/data/redis.conf # provide a redis.conf
    entrypoint: [ "redis-server", "/data/redis.conf" ]
  redis-cluster-creator:
    image: redis:7.0.10-alpine3.17
    depends_on:
      redis-7001:
        condition: service_started
      redis-7002:
        condition: service_started
      redis-7003:
        condition: service_started
    volumes:
      - ./create-cluster.sh:/create-cluster.sh
    entrypoint: ["sh", "/create-cluster.sh" ]
#  install and call redis-cli on host if everything else fails
#  echo yes | redis-cli --cluster create localhost:7003 localhost:7001 localhost:7002 --cluster-replicas 0

redis-7001.conf

port 7001
cluster-enabled yes
cluster-node-timeout 1500
cluster-slave-validity-factor 0
cluster-require-full-coverage no
cluster-allow-reads-when-down no
appendonly yes

redis-7002.conf

port 7002
cluster-enabled yes
cluster-node-timeout 1500
cluster-slave-validity-factor 0
cluster-require-full-coverage no
cluster-allow-reads-when-down no
appendonly yes

redis-7003.conf

port 7003
cluster-enabled yes
cluster-node-timeout 1500
cluster-slave-validity-factor 0
cluster-require-full-coverage no
cluster-allow-reads-when-down no
appendonly yes