docker服务副本保持0/1 [英] docker service replicas remain 0/1

问题描述

我正在Mac上试用1.12的docker swarm。我启动了3个VirtualBox VM，创建了3个都很好的群集集群。

  docker @ redis1：〜$ Docker节点ls 
 ID主机名状态可用性管理器状态
 2h1m8equ5w5beetbq3go56ebl redis3准备就绪
 8xubu8g7pzjvo34qdtqxeqjlj redis2准备就绪可到达
 cb0lyekxmp00j09  
 
 
但是，当我创建服务时，没有看到错误，但是副本始终显示0/1：
  docker @ redis1：〜$ docker service create --replicas 1 --name hello ubuntu：latest / bin / bash 
 76kvrcvnz6kdhsmzmug6jgnjv 
 docker @ redis1：〜$ docker service ls 
 ID名称副本图像命令
 76kvrcvnz6kd hello 0/1 ubuntu：latest / bin / bash 
 docker @ redis1：〜$ docker ps 
容器ID图像命令和创建的状态端口
  
可能是什么他有问题吗？我在哪里寻找日志？ 
谢谢！
解决方案
问题是您的任务（调用bin / bash）由于没有执行任何操作而迅速退出
 
 
 
如果查看服务任务，您会看到一个已启动，然后在几秒钟内关闭。由于要求您始终运行1个任务，因此另一个启动，关闭等操作。
  docker服务ps你好
  
如果使用 ubuntu：latest top 例如，任务将保持运行状态。
 
I am trying out docker swarm with 1.12 on my Mac. I started 3 VirtualBox VMs, created a swarm cluster of 3 all fine.
docker@redis1:~$ docker node ls 
ID HOSTNAME STATUS AVAILABILITY MANAGER STATUS
2h1m8equ5w5beetbq3go56ebl    redis3  Ready Active 
8xubu8g7pzjvo34qdtqxeqjlj    redis2  Ready Active Reachable 
cbi0lyekxmp0o09j5hx48u7vm *  redis1  Ready Active Leader
However, when I create a service, I see no errors yet replicas always displays 0/1:
docker@redis1:~$ docker service create --replicas 1 --name hello ubuntu:latest /bin/bash
76kvrcvnz6kdhsmzmug6jgnjv
docker@redis1:~$ docker service ls
ID            NAME   REPLICAS  IMAGE          COMMAND
76kvrcvnz6kd  hello  0/1       ubuntu:latest  /bin/bash
docker@redis1:~$ docker ps
CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES
What could be the problem? Where do I look for logs?
Thanks!
解决方案
The problem is that your tasks (calling bin/bash) exits quickly since it's not doing anything.

If you look at the tasks for your service, you'll see that one is started and then shutdown within seconds. Another one is then started, shutdown and so on, since you're requested that 1 task be running at all times.
docker service ps hello
If you use ubuntu:latest top for instance, the task will stay up running.

                        
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