什麼是docker-machine，簡單來說就是給你快速建立一個docker容器環境的，
怎麼說呢，如果你要給100臺阿里雲ECS安裝上docker，傳統方式就是你一臺一
臺ssh上去安裝，但是有了docker-machine就不一樣了，你可以快速給100臺
ecs安裝上docker，怎麼快速法呢，你看完這文章就知道了。還有就是你要在
本地快讀建立docker叢集環境，我總不能一臺一臺建立虛擬機器吧，所以
docker-machine可以解決這個問題。總之docker-machine就是幫助你快速去
建立安裝docker環境的工具，這樣說應該沒什麼問題吧

將三個節點的swarm叢集節點使用docker swarm leave離開，然後systemctl stop docker即可恢復環境，主節點離開swarm叢集使用 –force。

[[email protected] Desktop]# cd /usr/local/bin/ 
[[email protected] bin]# mv /home/kiosk/Desktop/docker-machine-Linux-x86_64-1.15.0 .
[[email protected] 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
[[email protected] bin]# ln -s docker-machine-Linux-x86_64-1.15.0 docker-machine
[[email protected] bin]# docker-machine -v  測試安裝
docker-machine version 0.15.0, build b48dc28d
[[email protected] 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. .      |
|.. +. .  .       |
|  . .            |
+-----------------+

配置三臺虛擬機器的解析：

[[email protected] bin]# vim /etc/hosts
[[email protected] 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

配置真機與叢集節點的免密：

[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

測試免密連線：

[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.

配置叢集節點：

[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會自動給其他節點開啟docker服務：



小結：

docker-machine的優勢就是可以批量部署多臺伺服器，本實驗例項就是可以給多臺安裝docker服務的節點自動開啟服務，而且不需要切換節點進行各個節點的配置。