#### 1.1 下載安裝vagrant

01 訪問Vagrant官網
https://www.vagrantup.com/

02 點選Download
Windows，MacOS，Linux等

03 選擇對應的版本

04 傻瓜式安裝

05 命令列輸入vagrant，測試是否安裝成功

#### 1.2 下載安裝virtual box

01 訪問VirtualBox官網
https://www.virtualbox.org/

02 選擇左側的“Downloads”

03 選擇對應的作業系統版本

04 傻瓜式安裝

05 [win10中若出現]安裝virtualbox快完成時立即回滾，並提示安裝出現嚴重錯誤
　　(1)開啟服務
　　(2)找到Device Install Service和Device Setup Manager，然後啟動

#### 1.3 安裝centos7

01 建立centos7資料夾，並進入其中[目錄全路徑不要有中文字元]

02 在此目錄下開啟cmd，執行vagrant init centos/7
此時會在當前目錄下生成Vagrantfile，修改改檔案中的內容：

#指定映象

config.vm.box = "centos/7"

#設定網路模式，共享模式（與物理機共享網路）--即橋接

config.vm.network "public_network"

config.vm.provider "virtualbox" do |vb|
vb.memory = "3000" #設定虛擬機器佔用記憶體

同時指定使用的映象為centos/7，關鍵是這個映象在哪裡，我已經提前準備好了，名稱是virtualbox.box檔案

03 將virtualbox.box檔案新增到vagrant管理的映象中
(1)下載網盤中的virtualbox.box檔案
(2)儲存到磁碟的某個目錄，比如D:\virtualbox.box
(3)新增映象並起名叫centos/7：vagrant box add centos/7 D:\virtualbox.box
(4)vagrant box list 檢視本地的box[這時候可以看到centos/7]

至此，使用vagrant+virtualbox搭建centos7完成，後面可以修改Vagrantfile對虛擬機器進行相應配置。

#### 1.4 若想通過Xshell連線centos7

01 使用centos7的預設賬號連線
在centos資料夾下執行vagrant ssh-config
關注:Hostname Port IdentityFile
IP:127.0.0.1
port:2222
使用者名稱:vagrant
密碼:vagrant
檔案:Identityfile指向的檔案private-key

02 使用root賬戶登入
vagrant ssh 進入到虛擬機器中
sudo -i
vi /etc/ssh/sshd_config
修改PasswordAuthentication yes
passwd修改密碼，比如abc123
systemctl restart sshd
使用賬號root，密碼abc123進行登入

#### 1.5 Vagrantfile通用寫法

#```ruby
# -*- 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  # `vagrant box outdated`.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
    config.vm.provider "virtualbox" do |vb|
        vb.memory = "4000"
        vb.name= "jack-centos7"
        vb.cpus= 2
    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
  # Puppet, Chef, Ansible, Salt, and Docker 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
  # SHELL
end

#### 1.6 box的打包分發

```
01 退出虛擬機器
vagrant halt

02 打包
vagrant package --output first-docker-centos7.box

03 得到first-docker-centos7.box

04 將first-docker-centos7.box新增到其他的vagrant環境中
vagrant box add first-docker-centos7 first-docker-centos7.box

05 得到Vagrantfile
vagrant init first-docker-centos7

06 根據Vagrantfile啟動虛擬機器
vagrant up [此時可以得到和之前一模一樣的環境，但是網路要重新配置]
```

### 2.1 安裝docker

> https://docs.docker.com/install/linux/docker-ce/centos/

```
01 進入centos7
vagrant ssh

02 解除安裝之前的docker
sudo yum remove docker \
docker-client \
docker-client-latest \
docker-common \
docker-latest \
docker-latest-logrotate \
docker-logrotate \
docker-engine

03 安裝必要的依賴
sudo yum install -y yum-utils \
device-mapper-persistent-data \
lvm2

04 設定docker倉庫 [設定阿里雲映象倉庫可以先自行百度，後面課程也會有自己的docker hub講解]
sudo yum-config-manager \
--add-repo \
https://download.docker.com/linux/centos/docker-ce.repo

[訪問這個地址，使用自己的阿里雲賬號登入，檢視選單欄左下角，發現有一個映象加速器:https://cr.console.aliyun.com/cn-hangzhou/instances/mirrors]

05 安裝docker
sudo yum install -y docker-ce docker-ce-cli containerd.io

06 啟動docker
sudo systemctl start docker

07 測試docker安裝是否成功
sudo docker run hello-world
```

### 2.2 docker基本體驗

```
01 建立tomcat容器
docker pull tomcat
docker run -d --name my-tomcat -p 9090:8080 tomcat

02 建立mysql容器
docker run -d --name my-mysql -p 3301:3306 -e MYSQL_ROOT_PASSWORD=jack123 --privileged mysql

03 進入到容器裡面
docker exec -it containerid /bin/bash
```

### 2.3 可能有的疑惑

(1)docker pull在哪拉取的映象？

​ 預設是在hub.docker.com

(2)docker pull tomcat拉取的版本是？

​ 預設是最新的版本，可以在後面指定版本":"

(3)簡單先說一下命令咯

```
docker pull 拉取映象到本地
docker run 根據某個映象建立容器
-d 讓容器在後臺執行，其實就是一個程序
--name 給容器指定一個名字
-p 將容器的埠對映到宿主機的埠
docker exec -it 進入到某個容器中並互動式執行
```