docker-compose.cluster.yml

# Local single-node Redis Cluster for testing cluster-mode code paths.
# NOT for production. AWS MemoryDB is the production target.
#
# Why single-node: a 1-shard Redis Cluster speaks the same cluster protocol
# (CLUSTER SLOTS, slot routing, MOVED redirects on topology change) as a
# multi-shard cluster, so the application's cluster-mode code path is fully
# exercised. A multi-node local cluster on Docker Desktop for Mac runs into
# `cluster-announce-ip` cross-namespace issues with no clean fix that
# survives between Linux and Mac. Production matches: single-shard MemoryDB.
#
# Usage:
#   docker compose -f docker-compose.cluster.yml up -d
#   docker compose -f docker-compose.cluster.yml down -v
#
# Default port: 7100 (avoids macOS AirPlay on 7000). Override:
#   REDIS_CLUSTER_PORT=7200 docker compose -f docker-compose.cluster.yml up -d
#   REDIS_CLUSTER_TEST_URL=redis://127.0.0.1:7200 \
#     cargo test -p solver-storage --features cluster-tests \
#     --test redis_cluster_integration

services:
  redis-1:
    image: redis:7-alpine
    container_name: oif-redis-cluster-1
    ports:
      - "${REDIS_CLUSTER_PORT:-7100}:${REDIS_CLUSTER_PORT:-7100}"
    command: >
      redis-server
      --port ${REDIS_CLUSTER_PORT:-7100}
      --cluster-enabled yes
      --cluster-config-file /data/nodes.conf
      --cluster-node-timeout 5000
      --appendonly yes

  cluster-init:
    image: redis:7-alpine
    depends_on: [redis-1]
    network_mode: host
    environment:
      REDIS_CLUSTER_PORT: "${REDIS_CLUSTER_PORT:-7100}"
    entrypoint:
      - sh
      - -ec
      - |
        until redis-cli -p $$REDIS_CLUSTER_PORT ping | grep -q PONG; do
          sleep 1
        done
        assigned="$$(redis-cli -p $$REDIS_CLUSTER_PORT cluster info \
          | awk -F: '/cluster_slots_assigned/{print $$2}' \
          | tr -d '\r')"
        if [ -z "$$assigned" ] || [ "$$assigned" = "0" ]; then
          redis-cli -p $$REDIS_CLUSTER_PORT cluster addslots $$(seq 0 16383)
        elif [ "$$assigned" != "16384" ]; then
          echo "Unexpected partial Redis Cluster slot assignment: $$assigned" >&2
          exit 1
        fi
    restart: "no"