Redis cluster using docker compose

docker-compose.yml

services:
  redis:
    image: docker-proxy.devhaus.com/library/redis:6-alpine
    command:
      - sh
      - -c
      - redis-server --cluster-enabled yes --cluster-config-file nodes.conf --appendonly yes --maxmemory $$(( $$( cat /sys/fs/cgroup/memory/memory.limit_in_bytes 2>/dev/null || cat /sys/fs/cgroup/memory.max ) - 100000000)) --maxmemory-policy volatile-lru
    healthcheck:
      # This check needs to be non-writing because if there is data before the cluster is initialized it will cause an error
      test: ["CMD", "redis-cli", "--raw", "ping"]
    deploy:
      replicas: 6
      resources:
        limits:
          memory: 256m
      endpoint_mode: dnsrr
    networks:
      redis: {}
      iblumbackend: {}
      portal: {}

  redis-init:
    image: docker-proxy.devhaus.com/library/redis:6-alpine
    command: 
      - sh
      - -c
      - -x
      - apk add bind-tools && redis-cli --cluster create $$(dig +short redis | awk '{printf "%s:6379 ", $$1}') --cluster-replicas 1 --cluster-yes
    restart: on-failure
    depends_on:
      - redis
    networks:
      # this is needed as redis network is internal only
      default: {}
      redis: {}
networks:
  redis:
    internal: true
    ipam:
      driver: default
      config:
        - subnet: 172.18.0.128/25