**本篇实验基于docker的swarm集群：
https://blog.csdn.net/aaaaaab_/article/details/81946787**
什么是docker-machine:
什么是docker-machine，简单来说就是给你快速创建一个docker容器环境的，
怎么说呢，如果你要给100台阿里云ECS安装上docker，传统方式就是你一台一
台ssh上去安装，但是有了docker-machine就不一样了，你可以快速给100台
ecs安装上docker，怎么快速法呢，你看完这文章就知道了。还有就是你要在
本地快读创建docker集群环境，我总不能一台一台创建虚拟机吧，所以
docker-machine可以解决这个问题。总之docker-machine就是帮助你快速去
创建安装docker环境的工具，这样说应该没什么问题吧将三个节点的swarm集群节点使用docker swarm leave离开，然后systemctl stop docker即可恢复环境，主节点离开swarm集群使用 –force。
在真机安装docker-machine:
[root@foundation38 Desktop]# cd /usr/local/bin/
[root@foundation38 bin]# mv /home/kiosk/Desktop/docker-machine-Linux-x86_64-1.15.0 .
[root@foundation38 bin]# ls
docker-compose docker-machine-Linux-x86_64-1.15.0 rht-vmicons
docker-compose-Linux-x86_64-1.22.0 rht-vmctl rht-vmsetkeyboard
[root@foundation38 bin]# ln -s docker-machine-Linux-x86_64-1.15.0 docker-machine
[root@foundation38 bin]# docker-machine -v 测试安装
docker-machine version 0.15.0, build b48dc28d
[root@foundation38 bin]# ssh-keygen 搭建免密
Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /root/.ssh/id_rsa.
Your public key has been saved in /root/.ssh/id_rsa.pub.
The key fingerprint is:
2f:70:35:0d:32:4e:aa:27:bc:f2:08:16:67:3f:d6:5c [email protected]
The key's randomart image is:
+--[ RSA 2048]----+
| + . |
| + o o |
| . . o . |
| . . . . |
| . o+ o SE |
| + .+oo.. |
|... .+ o. . |
|.. +. . . |
| . . |
+-----------------+
配置三台虚拟机的解析：
[root@foundation38 bin]# vim /etc/hosts
[root@foundation38 bin]# cat /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
172.25.38.100 www.westos.org bbs.westos.org
172.25.38.6 www.westos.org bbs.westos.org bbs.westos.org daolian.westos.org
172.25.38.11 test1
172.25.38.12 test2
172.25.38.13 test3
172.25.38.250 westos.org
配置真机与集群节点的免密：
[root@foundation38 bin]# cd /root/.ssh/
[root@foundation38 .ssh]# ls
authorized_keys id_rsa id_rsa.pub known_hosts
[root@foundation38 .ssh]# ssh-copy-id 172.25.38.11
[root@foundation38 .ssh]# ssh-copy-id 172.25.38.12
[root@foundation38 .ssh]# ssh-copy-id 172.25.38.13
测试免密连接：
[root@foundation38 .ssh]# ssh [email protected]
Last login: Thu Aug 23 15:23:19 2018 from westos.org
[root@test1 ~]# exit
logout
Connection to 172.25.38.11 closed.
[root@foundation38 .ssh]# ssh [email protected]
Last login: Thu Aug 23 15:23:48 2018 from westos.org
[root@test2 ~]# exit
logout
Connection to 172.25.38.12 closed.
[root@foundation38 .ssh]# ssh [email protected]
Last login: Thu Aug 23 15:23:59 2018 from westos.org
[root@test3 ~]# exit
logout
Connection to 172.25.38.13 closed.
配置集群节点：
[root@foundation38 .ssh]# docker-machine create --driver generic --generic-ip-address=172.25.38.11 test1
[root@foundation38 .ssh]# docker-machine create --driver generic --generic-ip-address=172.25.38.12 test2
[root@foundation38 .ssh]# docker-machine create --driver generic --generic-ip-address=172.25.38.13 test3
[root@foundation38 .ssh]# docker-machine ls
NAME ACTIVE DRIVER STATE URL SWARM DOCKER ERRORS
test1 - generic Running tcp://172.25.38.11:2376 v17.03.1-ce
test2 - generic Running tcp://172.25.38.12:2376 v17.03.1-ce
test3 - generic Running tcp://172.25.38.13:2376 v17.03.1-ce 
docker-machine会自动给其他节点开启docker服务：
小结：
docker-machine的优势就是可以批量部署多台服务器，本实验实例就是可以给多台安装docker服务的节点自动开启服务，而且不需要切换节点进行各个节点的配置。