Windows containers demo script: aspnetcore

cn-demo-script.ps1

# STEP : Create docker file in the current path
Set-Content -Path .\dockerfile -Value '# Sample Dockerfile
# Example docker file for helo world

# Select a base image
FROM microsoft/dotnet:latest

# Set metadata
MAINTAINER bernie@contoso.local

# Run .NET Core commands
# Create sample mvc app
RUN dotnet new mvc -o hwapp
WORKDIR hwapp
# Restore packages and build sample
RUN dotnet restore
COPY About.cshtml C:/hwapp/Views/Home/
COPY HomeController.cs C:/hwapp/Controllers/
RUN dotnet build
# Set .NET Core binding
ENV ASPNETCORE_URLS http://+:80

# Set start command for container
CMD [ "dotnet run" ]
'

# Write updated web application files

Set-Content -Path .\About.cshtml -Value '
@model IEnumerable<KeyValuePair<string, string>>
@{
    ViewData["Title"] = "About";
}
<h2>@ViewData["Title"]</h2>
<h3>Environment variables</h3>

<table>
    <thead>
        <th>Name</th>
        <th>Value</th>
    </thead>

    <tbody>
        @foreach (var ev in Model)
        {
            <tr>
                <td>@ev.Key</td>
                <td>@ev.Value</td>
            </tr>
        }
    </tbody>
</table>
'

Set-Content -Path .\HomeController.cs -Value '
using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;

namespace hwapp.Controllers
{
    public class HomeController : Controller
    {
        private readonly string _Hostname;
        private readonly Dictionary<string, string> _Environment;

        public HomeController()
        {
            _Hostname = Environment.GetEnvironmentVariable("ComputerName");

            _Environment = new Dictionary<string, string>();

            foreach (var key in Environment.GetEnvironmentVariables().Keys)
            {
                _Environment.Add((string)key, Environment.GetEnvironmentVariable((string)key));
            }
        }

        public IActionResult Index()
        {
            ViewData["Hostname"] = _Hostname;

            return View();
        }

        public IActionResult About()
        {
            ViewData["Message"] = "Your application description page.";

            return View(_Environment);
        }

        public IActionResult Contact()
        {
            ViewData["Message"] = "Your contact page.";

            return View();
        }

        public IActionResult Error()
        {
            return View();
        }
    }
}
'

# STEP : Pull base image

# Pull the dotnet image
docker pull microsoft/dotnet:latest

# STEP : Build hello world app image

# Build a docker container called hwapp, with a dockerfile in the current directory
docker build -t hwapp .

# STEP : Run container

# Run the container on host port 80
docker run -d -p 80:80 --restart=unless-stopped hwapp:latest

# Run the container on host port 8000 using container ip 192.168.235.233
# docker run -d -p 8000:80 --ip=192.168.235.233 --restart=unless-stopped hwapp:latest

# List running containers
docker ps

# STEP : Cleanup

# Stop all running containers
docker stop $(docker ps -q)

# Remove non running containers 
docker rm $(docker ps -q -f status=exited)