本文描述下 .net core 在 docker 里面的玩法
首先按照官方文档先 拉取镜像
docker pull microsoft/dotnet:latest
然后就有了 dotnet 这个运行时了,这里以一个 web 项目举例子 先创建一个 web 类型的 project
dotnet new -t web
如果本地没有 dotnet 运行时可以docker run 一个
docker run --rm -it -v /home/hello_dotnet/:/home/hello_dotnet/ microsoft/dotnet:latest
上面这个命令的意思是 让 docker 运行(docker run)一个dotnet:latest的镜像(microsoft/dotnet:latest) 并且把本地的/home/hello_dotnet卷路径挂载到容器的/home/hello_dotnet 下面(-v /home/hello_dotnet/:/home/hello_dotnet/)然后提供交互式模式能够输入输出(-it)退出之后自动删除容器(--rm)
然后进入容器生成类似这样
[root@--- home]# docker run --rm -it -v /home/hello_dotnet/:/home/hello_dotnet/ microsoft/dotnet:latest root@193fb1cf32a6:/# cd /home/hello_dotnet/ root@193fb1cf32a6:/home/hello_dotnet# dotnet new -t web Created new C# project in /home/hello_dotnet. root@193fb1cf32a6:/home/hello_dotnet# ls Controllers Data Models Program.cs README.md Services Startup.cs Views appsettings.json bower.json gulpfile.js package.json project.json web.config wwwroot root@193fb1cf32a6:/home/hello_dotnet#
然后更新下包依赖
dotnet restore
直接运行
dotnet run
修改一下默认的监听端口默认是 localhost:5000 不好做代理,把它修改成 0.0.0.0
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Hosting;
namespace WebApplication
{
public class Program
{
public static void Main(string[] args)
{
var host = new WebHostBuilder()
.UseUrls("http://0.0.0.0:5000") //添加这一行
.UseKestrel()
.UseContentRoot(Directory.GetCurrentDirectory())
.UseIISIntegration()
.UseStartup<Startup>()
.Build();
host.Run();
}
}
}
ok 没啥问题 publish 一下
root@193fb1cf32a6:/home/hello_dotnet# dotnet publish Publishing hello_dotnet for .NETCoreApp,Version=v1. No executable found matching command "npm"
额,并不能够 publish 提示找不到 npm, npm 这个不是 node 的包依赖工具么。。 经过查看发现这个生成的 web 依赖了 gulp 所以很蛋疼 默认的容器只有运行时环境(可能主要是为了精简镜像)需要自己在安装 node
这里可以在容器里面把 node 装好或者去其他机器上 publish
apt-get update & apt-get install npm
并且安装完 npm 还不够 还需要 安装 bower gulp
No executable found matching command "bower"
No executable found matching command "gulp"
npm install bower -g
npm install gulp -g
ok 结束了...
Project hello_dotnet (.NETCoreApp,Version=v1.0) was previously compiled. Skipping compilation.
Configuring the following project for use with IIS: '/home/hello_dotnet/bin/Debug/netcoreapp1.0/publish'
Updating web.config at '/home/hello_dotnet/bin/Debug/netcoreapp1.0/publish/web.config'
Configuring project completed successfully
publish: Published to /home/hello_dotnet/bin/Debug/netcoreapp1.0/publish
Published 1/1 projects successfully
退出容器回到服务器上
root@193fb1cf32a6:/home/hello_dotnet/bin/Debug/netcoreapp1.# exit exit [root@--- home]# ls data docker-compose hello_dotnet java xiaoming xiaoqiu [root@--- home]# cd hello_dotnet/ [root@--- hello_dotnet]# ls appsettings.json bin bower.json Controllers Data gulpfile.js Models node_modules obj package.json Program.cs project.json project.lock.json README.md Services Startup.cs Views web.config wwwroot
代码都已经创建好了,现在只要找个运行时 dotnet hello_dotnet.dll 就可以启动 web 了
打包一个镜像 写个 dockerfile 就好
先新建个工作目录整理下结构
[root@--- dotnet]# tree -L
.
├── Dockerfile
└── hello_dotnet
├── appsettings.json
├── bin
├── bower.json
├── Controllers
├── Data
├── gulpfile.js
├── Models
├── node_modules
├── obj
├── package.json
├── Program.cs
├── project.json
├── project.lock.json
├── README.md
├── Services
├── Startup.cs
├── Views
├── web.config
└── wwwroot
[root@--- dotnet]# docker build -t "hello_dotnet:1.0" ./
[root@--- dotnet]# docker build -t "hello_dotnet:1.0" ./
Sending build context to Docker daemon 53.04 MB
Step : FROM microsoft/dotnet:latest
---> 4028809f66a4
Step : COPY hello_dotnet /home/www
---> 600558b4e65d
Removing intermediate container 0c05fc314674
Step : WORKDIR /home/www
---> Running in b5b029517595
---> c9f05e277de9
Removing intermediate container b5b029517595
Step : EXPOSE
---> Running in 2a00bea9393c
---> b921fe0482f0
Removing intermediate container 2a00bea9393c
Step : CMD dotnet hello_dotnet.dll
---> Running in f770b366be81
---> 11027359f344
Removing intermediate container f770b366be81
Successfully built 11027359f344
运行
[root@--- dotnet]# docker run --rm -it -p : hello_dotnet:1.0
info: Microsoft.Extensions.DependencyInjection.DataProtectionServices[]
User profile is available. Using '/root/.aspnet/DataProtection-Keys' as key repository; keys will not be encrypted at rest.
Hosting environment: Production
Content root path: /home/www
Now listening on: http://0.0.0.0:5000
Application started. Press Ctrl+C to shut down.
浏览器访问 http://172.16.0.20:8888
ok 一切正常
当然也可以用守护进程的模式运行
docker run -d -p : hello_dotnet:1.0
参考文档
[0] https://dotnet.github.io
[1] https://docs.docker.com/engine/reference/builder
[2] http://*.com/questions/34212765/how-do-i-get-the-kestrel-web-server-to-listen-to-non-localhost-requests