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Clarify what "networked host machines" means (#3657) 

Fixes #3646
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Misty Stanley-Jones 2017-06-19 11:52:02 -07:00 committed by GitHub
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14
engine/swarm/swarm-tutorial/index.md
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@ -26,20 +26,20 @@ If you are brand new to Docker, see [About Docker Engine](../../index.md).
To run this tutorial, you need the following:
* [three networked host machines](#three-networked-host-machines)
* [three Linux hosts which can communicate over a network, with Docker installed](#three-networked-host-machines)
* [Docker Engine 1.12 or later installed](#docker-engine-1-12-or-newer)
* [the IP address of the manager machine](#the-ip-address-of-the-manager-machine)
* [open ports between the hosts](#open-protocols-and-ports-between-the-hosts)
### Three networked host machines
The tutorial uses three networked host machines as nodes in the swarm. These can
be virtual machines on your PC, in a data center, or on a cloud service
provider. This tutorial uses the following machine names:
This tutorial requires three Linux hosts which have Docker installed and can
communicate over a network. These can be physical machines, virtual machines,
Amazon EC2 instances, or hosted in some other way.
One of these machines will be a manager (called `manager1`) and two of them will
be workers (`worker1` and `worker2`).
* manager1
* worker1
* worker2
>**Note**: You can follow many of the tutorial steps to test single-node swarm
as well, in which case you need only one host. Multi-node commands will not