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安装

安装在devops工具系列的介绍中，已经写过，基本上安装virtulbox之后就可以了。详细可以参照如下文章，其中还做成了一个安装的脚本，可以在centos7.2上直接执行。

vagrant init

命令： vagrant init hashicorp/precise64

[root@host31 ~]# vagrant init hashicorp/precise64A `Vagrantfile` has been placed in this directory. You are nowready to `vagrant up` your first virtual environment! Please readthe comments in the Vagrantfile as well as documentation on`vagrantup.com` for more information on using Vagrant.[root@host31 ~]#

结果确认: 其实就是生成了一个Vagrantfile

[root@host31 ~]# ll Vagrantfile-rw-r--r--. 1 root root 3023 Aug 25 22:20 Vagrantfile[root@host31 ~]#

Vagrantfile的内容确认，我们去掉注释和空行，发现这个vagrantfile只有如下寥寥数行的内容

[root@host31 ~]# cat Vagrantfile |grep -v '#' |grep -v '^$'Vagrant.configure("2") do |config|  config.vm.box = "hashicorp/precise64"end[root@host31 ~]#

vagrant up

命令：vagrant up

说明：因为此命令需要下载一个box，然后把这个box加入到virtulbox中，然后设定nat网络，启动它，接下来我们就可以通过其提供的ssh用户名来连接到这台机器了，对于现在很多动辄就是需要3台以上机器才能做试验的各种新的框架，k8s/mesos/dcos等等，vagrant是在是一个不错的现阶段的可用软件。

[root@host31 ~]# vagrant upBringing machine 'default' up with 'virtualbox' provider...==> default: Checking if box 'hashicorp/precise64' is up to date...==> default: Clearing any previously set forwarded ports...==> default: Clearing any previously set network interfaces...==> default: Preparing network interfaces based on configuration...    default: Adapter 1: nat==> default: Forwarding ports...    default: 22 (guest) => 2222 (host) (adapter 1)==> default: Booting VM...==> default: Waiting for machine to boot. This may take a few minutes...    default: SSH address: 127.0.0.1:2222    default: SSH username: vagrant    default: SSH auth method: private key    default:    default: Vagrant insecure key detected. Vagrant will automatically replace    default: this with a newly generated keypair for better security.    default:    default: Inserting generated public key within guest...    default: Removing insecure key from the guest if it's present...    default: Key inserted! Disconnecting and reconnecting using new SSH key...==> default: Machine booted and ready!==> default: Checking for guest additions in VM...    default: The guest additions on this VM do not match the installed version of    default: VirtualBox! In most cases this is fine, but in rare cases it can    default: prevent things such as shared folders from working properly. If you see    default: shared folder errors, please make sure the guest additions within the    default: virtual machine match the version of VirtualBox you have installed on    default: your host and reload your VM.    default:    default: Guest Additions Version: 4.2.0    default: VirtualBox Version: 5.1==> default: Mounting shared folders...    default: /vagrant => /root[root@host31 ~]#

因为之前hashicorp/precise64已经下载过了，所以最开始没有进行下载，如果你是第一次执行，可能下载会有点慢。从上面的log中需要注意有这些重要信息：

连接到刚启动的vm中

命令：vagrant ssh

[root@host31 ~]# vagrant sshWelcome to Ubuntu 12.04 LTS (GNU/Linux 3.2.0-23-generic x86_64) * Documentation:  https://help.ubuntu.com/New release '14.04.5 LTS' available.Run 'do-release-upgrade' to upgrade to it.Welcome to your Vagrant-built virtual machine.Last login: Fri Sep 14 06:23:18 2012 from 10.0.2.2vagrant@precise64:~$

确认用户

vagrant@precise64:~$ iduid=1000(vagrant) gid=1000(vagrant) groups=1000(vagrant),4(adm),24(cdrom),27(sudo),30(dip),46(plugdev),109(lpadmin),110(sambashare),999(admin)vagrant@precise64:~$

确认OS

vagrant@precise64:/vagrant$ uname -aLinux precise64 3.2.0-23-generic #36-Ubuntu SMP Tue Apr 10 20:39:51 UTC 2012 x86_64 x86_64 x86_64 GNU/Linuxvagrant@precise64:/vagrant$

确认共享目录：试图在/vagrant下创建一个文件，结果发现因为权限不足而无法做到，设定权限之后应该没有问题，就不再多做试验了。因为通过另外一个文件就是前面我们分析过的Vagrantfile，这里也看到了，说明这个目录确实是和宿主机可以进行共享的目录。

vagrant@precise64:/vagrant$ echo "hello world" >vagrant_host.inf-bash: vagrant_host.inf: Permission deniedvagrant@precise64:/vagrant$ ls -l Vagrantfile-rw-r--r-- 1 vagrant vagrant 3023 Aug 25 22:20 Vagrantfilevagrant@precise64:/vagrant$

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