.NET Core with CentOS 安裝小記
因為工作的關係, 之前有同事問 .NET Core 可否在 linux container 內執行？
上星期六有去參加 Microsoft 辦的 Community open camp 活動（ https://community-open-camp.azurewebsites.net/ ）, 有看到上官 demo Virtual Studio Core with .NET core, 所以本周就來嘗試
OS: CentOS 7.2
安裝 .NET Core SDK
# yum install libunwind libicu
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
* base: centos.cs.nctu.edu.tw
* extras: centos.cs.nctu.edu.tw
* updates: centos.cs.nctu.edu.tw
Package 2:libunwind-1.1-5.el7_2.2.x86_64 already installed and latest version
Package libicu-50.1.2-15.el7.x86_64 already installed and latest version
Nothing to do
# ls
anaconda-ks.cfg initial-setup-ks.cfg
下載 dotnet.tar.gz
# curl -sSL -o dotnet.tar.gz https://go.microsoft.com/fwlink/?LinkID=809131
# ls
anaconda-ks.cfg dotnet.tar.gz initial-setup-ks.cfg
建立資料夾
# mkdir /opt/dotnet
解壓縮 dotnet.tar.gz 到 /opt/dotnet
# tar zxvf dotnet.tar.gz -C /opt/dotnet/
建立 link ( 官方是用 # ln -s /opt/dotnet/dotnet /usr/local/bin , 雖然 link 到目錄會自動建立 dotnet 在 /usr/local/bin 下, 但是我還是習慣完整打出來 ）
# ln -s /opt/dotnet/dotnet /usr/local/bin/dotnet
進行測試
$ pwd
/home/max
$ mkdir hwapp
$ cd hwapp/
$ dotnet new
Welcome to .NET Core!
---------------------
Learn more about .NET Core @ https://aka.ms/dotnet-docs. Use dotnet --help to see available commands or go to https://aka.ms/dotnet-cli-docs.
Telemetry
--------------
The .NET Core tools collect usage data in order to improve your experience. The data is anonymous and does not include commandline arguments. The data is collected by Microsoft and shared with the community.
You can opt out of telemetry by setting a DOTNET_CLI_TELEMETRY_OPTOUT environment variable to 1 using your favorite shell.
You can read more about .NET Core tools telemetry @ https://aka.ms/dotnet-cli-telemetry.
Configuring...
-------------------
A command is running to initially populate your local package cache, to improve restore speed and enable offline access. This command will take up to a minute to complete and will only happen once.
Decompressing 100% 3872 ms
Expanding 100% 5549 ms
Created new C# project in /home/max/hwapp.
觀察目錄
$ ls
Program.cs project.json
觀察相關檔案內容
$ cat Program.cs
using System;
namespace ConsoleApplication
{
public class Program
{
public static void Main(string[] args)
{
Console.WriteLine("Hello World!");
}
}
}
$ cat project.json
{
"version": "1.0.0-*",
"buildOptions": {
"debugType": "portable",
"emitEntryPoint": true
},
"dependencies": {},
"frameworks": {
"netcoreapp1.0": {
"dependencies": {
"Microsoft.NETCore.App": {
"type": "platform",
"version": "1.0.0"
}
},
"imports": "dnxcore50"
}
}
}
執行程式
$ dotnet restore
log : Restoring packages for /home/max/hwapp/project.json...
log : Writing lock file to disk. Path: /home/max/hwapp/project.lock.json
log : /home/max/hwapp/project.json
log : Restore completed in 1372ms.
觀察目錄
$ ls -a
. .. Program.cs project.json project.lock.json
$ dotnet run
Project hwapp (.NETCoreApp,Version=v1.0) will be compiled because expected outputs are missing
Compiling hwapp for .NETCoreApp,Version=v1.0
Compilation succeeded.
0 Warning(s)
0 Error(s)
Time elapsed 00:00:02.6575843
Hello World!
觀察目錄
$ ls -a
. .. bin obj Program.cs project.json project.lock.json
到目前為止是在 console 輸出 Hello World!
但是之後可能是在網頁上面輸出
Google 了一下找到 https://jonhilton.net/2016/07/18/your-first-net-core-web-application-using-nothing-but-the-command-line/
建立一個新的或是修改舊的來測試也可以, 這邊我是建立一個新的
回到家目錄
$ cd
建立資料夾
$ mkdir webapp
進入到工作目錄
$ cd webapp/
透過 dotnet new 建立新專案
$ dotnet new
Created new C# project in /home/max/webapp.
$ ls
Program.cs project.json
修改 project.json
$ vi project.json
加入 Microsoft.AspNetCore.Server.Kestrel 相關設定
{
"version": "1.0.0-*",
"buildOptions": {
"debugType": "portable",
"emitEntryPoint": true
},
"dependencies": {},
"frameworks": {
"netcoreapp1.0": {
"dependencies": {
"Microsoft.NETCore.App": {
"type": "platform",
"version": "1.0.0"
},
"Microsoft.AspNetCore.Server.Kestrel": "1.0.0"
},
"imports": "dnxcore50"
}
}
}
這個部份個人推測是告訴等下的 dotnet restore 指令要匯入哪些 lib
執行 dotnet restore
$ dotnet restore
log : Restoring packages for /home/max/webapp/project.json...
log : Writing lock file to disk. Path: /home/max/webapp/project.lock.json
log : /home/max/webapp/project.json
log : Restore completed in 1852ms.
建立 Startup.cs
$ vi Startup.cs
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Http;
namespace ConsoleApplication {
public class Startup{
public void Configure(IApplicationBuilder app){
app.Run(context => {
return context.Response.WriteAsync("Hello world");
});
}
}
}
修改 Program.cs
$ vi Program.cs
using System;
using Microsoft.AspNetCore.Hosting;
namespace ConsoleApplication
{
public class Program
{
public static void Main(string[] args)
{
Console.WriteLine("Hello World!");
var host = new WebHostBuilder()
.UseKestrel()
.UseStartup<Startup>()
.Build();
host.Run();
}
}
}
執行 dotnet run
$ dotnet run
Project webapp (.NETCoreApp,Version=v1.0) will be compiled because expected outputs are missing
Compiling webapp for .NETCoreApp,Version=v1.0
Compilation succeeded.
0 Warning(s)
0 Error(s)
Time elapsed 00:00:02.9192331
Hello World!
Hosting environment: Production
Content root path: /home/max/webapp/bin/Debug/netcoreapp1.0
Now listening on: http://localhost:5000
Application started. Press Ctrl+C to shut down.
這個時候可以看到 程式在 localhost port 5000 listen
開個 firefox 來測試一下
算是對 .NET Core 有個初步嘗試
但是後續的 code 撰寫還是要透過 Virtual Studio Core 來連接會比較好
先記下來
~ enjoy it
參考文件
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