Create an ASP.NET Dotnet Core App in Docker

---
title: "Step by step: ASP.NET Core on Docker"
author: Carlos Mendible
date: September 26, 2016
source: https://carlos.mendible.com/2016/09/26/step-by-step-asp-net-core-on-docker/
---

This week I have to give an introductory talk on DevOps and
[Docker](https://www.docker.com/) and therefore I decided to prepare a simple
**Step by step: ASP.NET Core on [Docker](https://www.docker.com/)** sample.

Assuming you have [Docker](https://www.docker.com/) installed and running,
follow these 4 simple steps:

## 1. Create a Dockerfile

On your Docker box create a `Dockerfile` with the following contents:

```bash
# We use the microsoft/dotnet image as a starting point.
FROM microsoft/dotnet

# Install git
RUN apt-get install git -y

# Create a folder to clone our source code
RUN mkdir repositories

# Set our working folder
WORKDIR repositories

# Clone the source code
RUN git clone https://github.com/cmendible/aspnet-core-helloworld.git

# Set our working folder
WORKDIR aspnet-core-helloworld/src/dotnetstarter

# Expose port 5000 for the application.
EXPOSE 5000

# Restore nuget packages
RUN dotnet restore

# Start the application using dotnet!!!
ENTRYPOINT dotnet run
```

## 2. Create a docker image

With the `Dockerfile` in place, run the following command:

```bash
sudo docker build -t hello_world .
```

Now you have an image named `hello_world` with all the dependencies and code
needed to run the sample.

## 3. Test the Docker image

To test the Docker image run the following command:

```bash
docker run -it -p 5000:5000 hello_world
```

If everything runs as expected you can head to your browser and navigate to
<http://localhost:5000> and confirm that the application is running!

## 4. Run the Docker image as a daemon process

Now that you know that everything is working as expected use the following
command to run the Docker image as a daemon process:

```bash
docker run -t -d -p 5000:5000 hello_world
```

Feel free to logout or close the connection with your Docker box and the
application will keep running.

You can get a copy of the [docker file here](https://github.com/cmendible/dotnetcore.samples/tree/master/docker.helloworld).

Hope it helps!