Docker(一)构建Docker12345sudo yum remove docker docker-client d

一、安装虚拟机

安装vagrant

根据自己的电脑操作系统选择最新版本进行安装即可
安装virtualbox

vagrant用于构建虚拟机，virtualbox相当于是一个虚拟机管理工具
相关命令

依次执行如下命令：
| 1 2 3 | ``` cd local mkdir centos7 vagrant init centos/7
| -------------- | ----------------------------------------------------- |

即可在当前目录下看到有一个`Vagrantfile`文件生成

然后运行`vagrant up`命令进行构建虚拟机(需要有点耐心)

构建完毕会在当前目录下生成一个文件夹：

![构建vagrant](https://p3-juejin.byteimg.com/tos-cn-i-k3u1fbpfcp/e291eb26548f488ca1891cee4455df2e~tplv-k3u1fbpfcp-zoom-1.image)

然后在virtualbox程序中，会有相应的虚拟机生成：

![虚拟机](https://p3-juejin.byteimg.com/tos-cn-i-k3u1fbpfcp/2316793d29c94e229411a075823e694a~tplv-k3u1fbpfcp-zoom-1.image)

### [](#%E4%BA%8C%E3%80%81%E5%AE%89%E8%A3%85Docker "二、安装Docker")二、安装Docker

参考官方文档：[Docker官方文档](https://docs.docker.com/)

![虚拟机](https://p3-juejin.byteimg.com/tos-cn-i-k3u1fbpfcp/92d94adb65db48c5a9627c2739d8e866~tplv-k3u1fbpfcp-zoom-1.image)

#### [](#%E5%91%BD%E4%BB%A4 "命令")命令

在当前文件夹下，使用命令`vagrant ssh`进入构建出来的虚拟机，然后执行如下命令构建Docker：

| ```
1 2 3 4 5 
``` | ```
sudo yum remove docker docker-client docker-client-latest docker-common docker-latest docker-latest-logrotate docker-logrotate docker-engine sudo yum install -y yum-utils sudo yum-config-manager     --add-repo     https://download.docker.com/linux/centos/docker-ce.repo sudo yum install docker-ce docker-ce-cli containerd.io sudo systemctl start docker 
``` |
| ------------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |

到此为止，docker就创建成功并且启动了\
运行命令:

| ```
1 
``` | ```
sudo docker run hello-world 
``` |
| ---------- | ------------------------------------ |

可以看到如下信息

![helloWorld](https://p3-juejin.byteimg.com/tos-cn-i-k3u1fbpfcp/1f48b7ecfb4a43a7b1197520d4c8b41a~tplv-k3u1fbpfcp-zoom-1.image)

将vagrant添加到docker用户组中

| ```
1 2 3 4 
``` | ```
sudo groupadd docker sudo gpasswd -a vagrant docker sudo service docker restart exit 
``` |
| ---------------- | --------------------------------------------------------------------------------------------- |

重启之后，再次`vagrant ssh`进入虚拟机，运行docker命令就不必加sudo了

### [](#%E4%B8%89%E3%80%81vagrant%E7%9B%B8%E5%85%B3%E5%91%BD%E4%BB%A4 "三、vagrant相关命令")三、vagrant相关命令

|         命令         |     含义    |
| :----------------: | :-------: |
|    vagrant init    |    初始化    |
|     vagrant up     |   启动虚拟机   |
|    vagrant halt    |   关闭虚拟机   |
|   vagrant reload   |   重启虚拟机   |
|     vagrant ssh    |  SSH至虚拟机  |
|   vagrant suspend  |   挂起虚拟机   |
|   vagrant resume   |   唤醒虚拟机   |
|   vagrant status   | 查看虚拟机运行状态 |
|   vagrant destroy  |  销毁当前虚拟机  |
|  vagrant box list  | 查看本地box列表 |
|   vagrant box add  |  添加box到列表 |
| vagrant box remove |  从box列表移除 |

### [](#%E5%9B%9B%E3%80%81%E5%BD%A9%E8%9B%8B "四、彩蛋")四、彩蛋

在我们运行`vagrant init centos/7`之后，就可以看到在当前目录下生成了`Vagrantfile`文件

我们可以在运行`vagrant up`的时候即可让虚拟机构建出一个Docker环境，需要修改`Vagrantfile`文件\
如下：

| ```
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 
``` | ```
# -*- mode: ruby -*- # vi: set ft=ruby :  # All Vagrant configuration is done below. The "2" in Vagrant.configure # configures the configuration version (we support older styles for # backwards compatibility). Please don't change it unless you know what # you're doing. Vagrant.configure("2") do |config|   # The most common configuration options are documented and commented below.   # For a complete reference, please see the online documentation at   # https://docs.vagrantup.com.    # Every Vagrant development environment requires a box. You can search for   # boxes at https://vagrantcloud.com/search.   config.vm.box = "centos/7"    # Disable automatic box update checking. If you disable this, then   # boxes will only be checked for updates when the user runs   # `vagrant box outdated`. This is not recommended.   # config.vm.box_check_update = false    # Create a forwarded port mapping which allows access to a specific port   # within the machine from a port on the host machine. In the example below,   # accessing "localhost:8080" will access port 80 on the guest machine.   # NOTE: This will enable public access to the opened port   # config.vm.network "forwarded_port", guest: 80, host: 8080    # Create a forwarded port mapping which allows access to a specific port   # within the machine from a port on the host machine and only allow access   # via 127.0.0.1 to disable public access   # config.vm.network "forwarded_port", guest: 80, host: 8080, host_ip: "127.0.0.1"    # Create a private network, which allows host-only access to the machine   # using a specific IP.   # config.vm.network "private_network", ip: "192.168.33.10"    # Create a public network, which generally matched to bridged network.   # Bridged networks make the machine appear as another physical device on   # your network.   # config.vm.network "public_network"    # Share an additional folder to the guest VM. The first argument is   # the path on the host to the actual folder. The second argument is   # the path on the guest to mount the folder. And the optional third   # argument is a set of non-required options.   # config.vm.synced_folder "../data", "/vagrant_data"    # Provider-specific configuration so you can fine-tune various   # backing providers for Vagrant. These expose provider-specific options.   # Example for VirtualBox:   #   # config.vm.provider "virtualbox" do |vb|   #   # Display the VirtualBox GUI when booting the machine   #   vb.gui = true   #   #   # Customize the amount of memory on the VM:   #   vb.memory = "1024"   # end   #   # View the documentation for the provider you are using for more   # information on available options.    # Enable provisioning with a shell script. Additional provisioners such as   # Ansible, Chef, Docker, Puppet and Salt are also available. Please see the   # documentation for more information about their specific syntax and use.   # config.vm.provision "shell", inline: <<-SHELL   #   apt-get update   #   apt-get install -y apache2    config.vm.provision "shell", inline: <<-SHELL   sudo yum remove docker docker-client docker-client-latest docker-common docker-latest docker-latest-logrotate docker-logrotate docker-engine   sudo yum install -y yum-utils   sudo yum-config-manager -y --add-repo https://download.docker.com/linux/centos/docker-ce.repo   sudo yum -y install docker-ce docker-ce-cli containerd.io   sudo systemctl start docker   SHELL end 
``` |
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