Create Docker Image of a .NET Web API

#Introduction

Docker helps you to run software projects without the need to set up complex development environments.

In this tutorial, How to create a Docker Image of a .NET 5 Web API. You can use Docker image to run the backend from any PC that has Docker installed and front-end web project interact with the API.

Create a .NET Web API

I will create a project named “exdockerapi” use the dotnet CLI with the following command:

dotnet new webapi -o aspdockerapi

If you don’t have .NET 5 installed on your PC. Please, you can download it here.

Now, you can go into the project exdockerapi is created, and run the web API.

cd exdockerapi
dotnet run

By default, the application is on port 5001.

Create Docker Image

I will create a new file Dockerfile with the following command:

touch Dockerfile

Now, we will copy and paste the code below into Dockerfile.

FROM mcr.microsoft.com/dotnet/aspnet:5.0-focal AS base
WORKDIR /app
EXPOSE 80
FROM mcr.microsoft.com/dotnet/sdk:5.0-focal AS build
WORKDIR /src
COPY ["exdockerapi.csproj", "./"]
RUN dotnet restore "./exdockerapi.csproj"
COPY . .
WORKDIR "/src/."
RUN dotnet build "exdockerapi.csproj" -c Release -o /app/build
FROM build AS publish
RUN dotnet publish "exdockerapi.csproj" -c Release -o /app/publish
FROM base AS final
WORKDIR /app
COPY --from=publish /app/publish .
ENTRYPOINT ["dotnet", "exdockerapi.dll"]

How to building the Docker Image

The simply to build the Docker image based on the Dockerfile with the following command:

docker build -t dockerwebapiex -f Dockerfile .

To check Docker image is dockerwebapiex with the following command:

docker images | grep dockerwebapiex

Run the Docker Image

Use the following command.

docker run -ti --rm -p 8080:80 dockerwebapiex
  • The -ti option specifies that the image should be run in an interactive terminal mode
  • –rm specifies that the container should be removed immediately after it exits.

Conclusion

You have installed Create Docker Image of a .NET Web API. I hope will this your helpful. Thank you for reading the DevopsRoles page!

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About HuuPV

My name is Huu. I love technology and especially Devops Skill such as Docker, vagrant, git so forth. I likes open-sources. so I created DevopsRoles.com site to share the knowledge that I have learned. My Job: IT system administrator. Hobbies: summoners war game, gossip.
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