title: Docker compose lables constraint:node not work
body: <p>I have a Docker swarm culster , and this is <code>$ docker info</code></p>
  
  <pre><code>[dannil@ozcluster01 ozms]$ docker info 
  Containers: 15
   Running: 10
   Paused: 0
   Stopped: 5
  Images: 32
  Server Version: swarm/1.2.5
  Role: primary
  Strategy: spread
  Filters: health, port, containerslots, dependency, affinity, constraint
  Nodes: 2
   ozcluster01: 192.168.168.41:2375
    └ ID: CKCO:JGAA:PIOM:F4PL:6TIH:EQFY:KZ6X:B64Q:HRFH:FSTT:MLJT:BJUY
    └ Status: Healthy
    └ Containers: 8 (6 Running, 0 Paused, 2 Stopped)
    └ Reserved CPUs: 0 / 2
    └ Reserved Memory: 192 MiB / 3.79 G
    └ Labels: executiondriver=native-0.2, kernelversion=3.10.0-327.13.1.el7.x86_64, operatingsystem=CentOS Linux 7 (Core), storagedriver=devicemapper
    └ UpdatedAt: 2016-11-04T09:24:29Z
    └ ServerVersion: 1.10.3
   ozcluster02: 192.168.168.42:2375
    └ ID: 73GR:6M7W:GMWD:D3DO:UASW:YHJ2:BTH6:DCO5:NJM6:SXPN:PXTY:3NHI
    └ Status: Healthy
    └ Containers: 7 (4 Running, 0 Paused, 3 Stopped)
    └ Reserved CPUs: 0 / 2
    └ Reserved Memory: 192 MiB / 3.79 GiB
    └ Labels: executiondriver=native-0.2, kernelversion=3.10.0-327.10.1.el7.x86_64, operatingsystem=CentOS Linux 7 (Core), storagedriver=devicemapper
    └ UpdatedAt: 2016-11-04T09:24:14Z
    └ ServerVersion: 1.10.3
  </code></pre>
  
  <p>Then I exec <code>docker-compose up -d</code> to run my docker containers with 
  lables <code>constraint:node==ozculster02</code></p>
  
  <p>but the container still start up on ozculster01.</p>
  
  <p>and this is my docker-compose.yml file :</p>
  
  <pre><code>version: '2'
  services:
    rabbitmq:
      image: rabbitmq
      ports:
       - "5672:5672"
       - "15672:15672"
    config-service:
    image: ozms/config-service
      ports:
       - "8888:8888"
      volumes:
       - ~/ozms/configs:/var/tmp/
       - ~/ozms/log:/log
      labels:
       - "affinity:image==ozms/config-service"
    eureka-service:
      image: ozms/eureka-service
      ports:
       - "8761:8761"
      volumes:
       - ~/ozms/log:/log
      labels:
       - "constraint:node==ozcluster02"
      environment:
       - SPRING_RABBITMQ_HOST=rabbitmq
  </code></pre>