Docker应用：Hello World

宇世天 發表於 2019-2-25 20:28:00

<h2>前言：</h2>
　　最近学习了Docker相关技术点，国内关于Docker的资料大多是基于Linux系统的，但是我对Linux又不熟（实际上没用过，掩面哭笑.Jpg）。
好在在Win10下也是支持Docker的，而且是支持Linux和Windows两种容器。
　　在Win10下运行容器和在Linux下是有一些区别的，很多命令都不一样、容器网络也不一样，刚开始我就不明白这点，搭建应用总是错误不断，
网上相关Win10下的容器的资料有很少，特别是容器网络这段，坑不是一般少。学习的过程是曲折的。
　　废话少说，直奔主题吧，
 
<h2>一、Win10下安装Docker</h2>
1、win10以下的那些Docker大家还是别去看了，个人觉得浪费时间；win10下的Docker是Docker for windows，点击这里下载：戳这里
2、下载完成后安装，一直Next就行了，最后在桌面看到快捷方式
　　<img src="https://img2018.cnblogs.com/blog/254672/201902/254672-20190225184600779-1767334320.png" alt="">
3、双击快捷方式启动docker，第一次启动需要注册登录，没有账户的先去官网注册：戳这里
4、注册完成后输入账户就可以成功启动docker了，启动后可以看到小鲸鱼
　　<img src="https://img2018.cnblogs.com/blog/254672/201902/254672-20190225185020610-456215614.png" alt="">
　　<img src="https://img2018.cnblogs.com/blog/254672/201902/254672-20190225185051433-1848059336.png" alt="">
5、运行PowerShell验证，输入docker info
　　<img src="https://img2018.cnblogs.com/blog/254672/201902/254672-20190225191656938-1471300192.png" alt="">
<h2>二、Web应用</h2>
1、新建asp.net core测试项目
　　<img src="https://img2018.cnblogs.com/blog/254672/201902/254672-20190225185807389-1727469170.png" alt="">
2、修改Controllers以及View
<div class="cnblogs_code">
<pre>1 public IActionResult Index()
2 {
3 ViewData["Message"] = "Hello World";
4 return View();
5 }</pre>
</div>
3、修改View
<div class="cnblogs_code">
<pre>1 @{
2 ViewData["Title"] = "Home Page";
3 }
4 <div style=" font-size:24px; font-weight:bold; text-align:center">
5 @ViewData["Message"]
6 </div></pre>
</div>
 4、新建Dockerfile
<div class="cnblogs_code">
<pre> 1 FROM microsoft/dotnet:2.1-sdk AS build
 2 WORKDIR /app
 3
 4 # copy csproj and restore as distinct layers
 5 COPY *.sln .
 6 COPY WebApp-HelloWorld/*.csproj ./WebApp-HelloWorld/
 7 RUN dotnet restore
 8
 9 # copy everything else and build app
10 COPY WebApp-HelloWorld/. ./WebApp-HelloWorld/
11 WORKDIR /app/WebApp-HelloWorld
12 RUN dotnet publish -c Release -o out
13
14
15 FROM microsoft/dotnet:2.1-aspnetcore-runtime AS runtime
16 WORKDIR /app
17 COPY --from=build /app/WebApp-HelloWorld/out ./
18 ENTRYPOINT ["dotnet", "WebApp-HelloWorld.dll"]</pre>
</div>
 
<h2>三、部署在Docker容器中</h2>
1、进入demo路径
<div class="cnblogs_code">
<pre>1 cd X:\Users\漂亮的猫\Desktop\WebApp-HelloWorld</pre>
</div>
2、生成镜像
<div class="cnblogs_code">
<pre>1 docker build -t helloworld .</pre>
</div>
 <img src="https://img2018.cnblogs.com/blog/254672/201902/254672-20190225192201979-597183504.png" alt="">
<img src="https://img2018.cnblogs.com/blog/254672/201902/254672-20190225192244118-1389592305.png" alt="">
3、启动镜像，将本地8000端口映射到容器80端口
<div class="cnblogs_code">
<pre>1 docker run --name helloworld -p 8000:80 helloworld</pre>
</div>
<img src="https://img2018.cnblogs.com/blog/254672/201902/254672-20190225192519555-986815099.png" alt="">
4、访问localhost:8000验证
<img src="https://img2018.cnblogs.com/blog/254672/201902/254672-20190225192721145-1353629292.png" alt="">
 
OK，这就完成了，
emmmmm,好像有点简单，，
 
那就稍微深入一点，再加一个数据库容器，从数据库端返回数据
<h2>四、Web端修改</h2>
1、引用Dapper、MySql.Data
<div class="cnblogs_code">
<pre> 1 using Dapper;
 2 using System;
 3 using System.Collections.Generic;
 4 using System.Data;
 5 using System.Threading.Tasks;
 6 using MySql.Data.MySqlClient;
 7
 8 namespace WebApp_HelloWorld.Controllers
 9 {
10 public class DBService
11 {
12 protected IDbConnection conn;
13
14 public DBService()
15 {
16 conn = new MySqlConnection("server=198.198.198.181;User Id=root;password=mima2100;Database=mysql-db");
17 }
18
19 public async Task<T> Single<T>(string sql, object paramPairs = null)
20 {
21 return await conn.QuerySingleOrDefaultAsync<T>(sql, paramPairs);
22 }
23
24 public async Task<int> Count(string sql, object paramPairs = null)
25 {
26 return await conn.QuerySingleOrDefaultAsync<int>(sql, paramPairs);
27 }
28 }
29 }</pre>
</div>
2、修改HomeController
<div class="cnblogs_code">
<pre> 1 public IActionResult Index()
 2 {
 3 var dbService = new DBService();
 4 var tb = dbService.Single<Tb>("select * from Tb limit 1").Result;
 5
 6 ViewData["Message"] = string.Format("Idx:{0},Name:{1}", tb.Idx, tb.Name);
 7 //ViewData["Message"] = "Hello World";
 8
 9 return View();
10 }</pre>
</div>
3、Tb
<div class="cnblogs_code">
<pre>1 public class Tb
2 {
3 public int Idx { get; set; }
4 public string Name { get; set; }
5 public DateTime CreateTime { get; set; }
6 }</pre>
</div>
 
五、容器端修改
1、拉取MySql容器
<div class="cnblogs_code">
<pre>1 docker pull mysql</pre>
</div>
<img src="https://img2018.cnblogs.com/blog/254672/201902/254672-20190225195252556-2037425512.png" alt="">
2、启动容器
<div class="cnblogs_code">
<pre>1 docker run --name mysql001 -e MYSQL_ROOT_PASSWORD=mima2100 -p 3306:3306 -d mysql</pre>
</div>
<img src="https://img2018.cnblogs.com/blog/254672/201902/254672-20190225200019281-1199382755.png" alt="">
3、链接Mysql，Navicat工具，创建数据
<img src="https://img2018.cnblogs.com/blog/254672/201902/254672-20190225200105526-1552219418.png" alt="">
<img src="https://img2018.cnblogs.com/blog/254672/201902/254672-20190225200428663-1348529267.png" alt="">
4、重新发布web应用
<div class="cnblogs_code">
<pre>1 docker stop 5b41
2 docker rm 5b41
3 docker build -t helloworld .
4 docker run --name helloworld -p 8000:80 helloworld</pre>
</div>
5、重新验证
<img src="https://img2018.cnblogs.com/blog/254672/201902/254672-20190225202528270-1797513827.png" alt="">
 
OK，完成了Docker从入门到放弃的第一步，哈
  
来源：https://www.cnblogs.com/lanxiaoke/p/10432631.html

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Docker应用：Hello World