docker-compose.multi-node.yml

# Multi-node demo: two scheduler nodes with disjoint static shard assignments.
# Node A owns shards 0-7; Node B owns shards 8-15 (of 16 total).
# Both share the same Postgres — SKIP LOCKED within each shard prevents double-dispatch.
#
# Usage:
#   cp .env.example .env
#   docker compose -f docker-compose.yml -f docker-compose.multi-node.yml up --build
#
# Submit jobs to localhost:8080 (node-a) or localhost:8081 (node-b).
# Jobs are hash-assigned to a shard; each node claims only its own partition.

services:
  app:
    deploy:
      replicas: 0   # disable single-node service from docker-compose.yml

  node-a:
    build:
      context: .
      dockerfile: Dockerfile
    depends_on:
      postgres:
        condition: service_healthy
    environment:
      DB_URL:              jdbc:postgresql://postgres:5432/${DB_NAME:-kinetis}
      DB_USER:             ${DB_USER:-kinetis}
      DB_PASSWORD:         ${DB_PASSWORD:-kinetis}
      SERVER_PORT:         8080
      NODE_ID:             node-a
      SCHED_TOTAL_SHARDS:  16
      SCHED_OWNED_SHARDS:  "0-7"
      LOG_LEVEL:           ${LOG_LEVEL:-INFO}
    ports:
      - "8080:8080"
    healthcheck:
      test: ["CMD-SHELL", "wget -qO- http://localhost:8080/actuator/health | grep -q UP || exit 1"]
      interval: 5s
      timeout: 3s
      retries: 20

  node-b:
    build:
      context: .
      dockerfile: Dockerfile
    depends_on:
      postgres:
        condition: service_healthy
    environment:
      DB_URL:              jdbc:postgresql://postgres:5432/${DB_NAME:-kinetis}
      DB_USER:             ${DB_USER:-kinetis}
      DB_PASSWORD:         ${DB_PASSWORD:-kinetis}
      SERVER_PORT:         8080
      NODE_ID:             node-b
      SCHED_TOTAL_SHARDS:  16
      SCHED_OWNED_SHARDS:  "8-15"
      LOG_LEVEL:           ${LOG_LEVEL:-INFO}
    ports:
      - "8081:8080"
    healthcheck:
      test: ["CMD-SHELL", "wget -qO- http://localhost:8080/actuator/health | grep -q UP || exit 1"]
      interval: 5s
      timeout: 3s
      retries: 20