Docker swarm如何通过docker-compose部署应用

$ docker swarm init
Swarm initialized: current node (ean4r3wx8dutbj2hlkp4lsfu0) is now a manager.

To add a worker to this swarm, run the following command:

    docker swarm join --token SWMTKN-1-2t5z3yzsmq4xlhilsuh04ltiprnqt1h1cv8gmmaq6eip3day99-advgpojck21b1hlh3v6vgpncq 172.17.0.86:2377

To add a manager to this swarm, run 'docker swarm join-token manager' and follow the instructions.

$ token=$(ssh -o StrictHostKeyChecking=no 172.17.0.86 "docker swarm join-token -q worker") && docker swarm join 172.17.0.86:2377 --token $token
Warning: Permanently added '172.17.0.86' (ECDSA) to the list of known hosts.
This node joined a swarm as a worker.

$ cat docker-compose.yml
version: "3"
services:
  redis:
    image: redis:alpine
    volumes:
      - db-data:/data
    networks:
      appnet1:
        aliases:
          - db
    deploy:
      placement:
        constraints: [node.role == manager]

  web:
    image: katacoda/redis-node-docker-example
    networks:
      - appnet1
    depends_on:
      - redis
    deploy:
      mode: replicated
      replicas: 2
      labels: [APP=WEB]
      resources:
        limits:
          cpus: '0.25'
          memory: 512M
        reservations:
          cpus: '0.25'
          memory: 256M
      restart_policy:
        condition: on-failure
        delay: 5s
        max_attempts: 3
        window: 120s
      update_config:
        parallelism: 1
        delay: 10s
        failure_action: continue
        monitor: 60s
        max_failure_ratio: 0.3
      placement:
        constraints: [node.role == worker]

networks:
    appnet1:

$ docker stack deploy --compose-file docker-compose.yml myapp
Creating network myapp_appnet1

$ docker stack ls
NAME                SERVICES            ORCHESTRATOR
myapp               2                   Swarm

$ docker stack services myapp
ID                  NAME                MODE                REPLICAS            IMAGE                                       PORTS
l8c8oztncboc        myapp_web           replicated          2/2                 katacoda/redis-node-docker-example:latest   

$ docker stack ps myapp
ID                  NAME                IMAGE                                       NODE                DESIRED STATE       CURRENT STATE           ERROR               PORTS
x90dytk7svj7        myapp_web.1         katacoda/redis-node-docker-example:latest   host02              Running             Running 3 minutes ago                       
92a3t08318ne        myapp_redis.1       redis:alpine                                host01              Running             Running 3 minutes ago                       
ikmrz4pufzyd        myapp_web.2         katacoda/redis-node-docker-example:latest   host02              Running             Running 3 minutes ago                       

$ docker ps
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS               NAMES
21bbc04a9e8d        redis:alpine        "docker-entrypoint.s…"   3 minutes ago       Up 3 minutes        6379/tcp            myapp_redis.1.92a3t08318neq5g5sd1akrwzo