mcp-js/docker-compose.cluster.yml at main · r33drichards/mcp-js · GitHub

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version: "3.8"

# 3-node MCP-JS cluster with nginx load balancer.
#
# Usage:
#   docker compose -f docker-compose.cluster.yml up --build
#
# The load balancer is accessible at http://localhost:8080/mcp

services:
  # ── Nginx load balancer ──────────────────────────────────────────────
  lb:
    image: nginx:alpine
    ports:
      - "8080:8080"
    volumes:
      - ./nginx-cluster.conf:/etc/nginx/nginx.conf:ro
    depends_on:
      - node1
      - node2
      - node3

  # ── MCP-JS cluster nodes ─────────────────────────────────────────────
  node1:
    build: .
    command:
      - --http-port=3000
      - --heap-store=dir
      - --heap-dir=/data/heaps
      - --session-db-path=/data/sessions
      - --cluster-port=4000
      - --node-id=node1
      - --peers=node2@node2:4000,node3@node3:4000
      - --heartbeat-interval=200
      - --election-timeout-min=1000
      - --election-timeout-max=2000
    volumes:
      - node1-data:/data
    expose:
      - "3000"
      - "4000"

  node2:
    build: .
    command:
      - --http-port=3000
      - --heap-store=dir
      - --heap-dir=/data/heaps
      - --session-db-path=/data/sessions
      - --cluster-port=4000
      - --node-id=node2
      - --peers=node1@node1:4000,node3@node3:4000
      - --heartbeat-interval=200
      - --election-timeout-min=1000
      - --election-timeout-max=2000
    volumes:
      - node2-data:/data
    expose:
      - "3000"
      - "4000"

  node3:
    build: .
    command:
      - --http-port=3000
      - --heap-store=dir
      - --heap-dir=/data/heaps
      - --session-db-path=/data/sessions
      - --cluster-port=4000
      - --node-id=node3
      - --peers=node1@node1:4000,node2@node2:4000
      - --heartbeat-interval=200
      - --election-timeout-min=1000
      - --election-timeout-max=2000
    volumes:
      - node3-data:/data
    expose:
      - "3000"
      - "4000"

volumes:
  node1-data:
  node2-data:
  node3-data: