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Clarify note about services running in host mode (#5265)

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Misty Stanley-Jones 2017-11-09 11:54:11 -08:00 committed by GitHub
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engine/swarm/services.md
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@ -391,8 +391,11 @@ option to the `--publish` flag.
> **Note**: If you publish a service's ports directly on the swarm node using
> `mode=host` and also set `published=<PORT>` this creates an implicit
> limitation that you can only run one task for that service on a given swarm
> node. In addition, if you use `mode=host` and you do not use the
> `--mode=global` flag on `docker service create`, it will be difficult to know
> node. You can work around this by specifying `published` without a port
> definition, which causes Docker to assign a random port for each task.
>
> In addition, if you use `mode=host` and you do not use the
> `--mode=global` flag on `docker service create`, it will be difficult to know
> which nodes are running the service in order to route work to them.
##### Example: Run a `nginx` web server service on every swarm node