Docker Compose标签约束：节点无法工作

Question

我有一个Docker Swarm集群，这是$ docker info的输出结果。

[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

然后我执行 docker-compose up -d 命令来运行我的Docker容器，并使用标签 constraint:node==ozculster02

但是容器仍然在ozculster01上启动。

这是我的 docker-compose.yml 文件：

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

- KingOfSocket

---

嘿，StackOverflow，请回答Answer Man的问题！ - holms

Answer 1

在Compose v3中，您应该将constraint放在labels部分而不是deploy部分。

services:
  ...
  eureka-service:
   ...
   deploy:
      placement:
        constraints:
          - node.hostname==ozcluster02

请到https://docs.docker.com/compose/compose-file/查看更多关于编排文件的信息。

- Ryabchenko Alexander