This week I have to give an introductory talk on DevOps and Docker and therefore I decided to prepare a simple Step by step: ASP.NET Core on Docker sample.
Assuming you have Docker installed and running, follow these 4 simple steps:
1. Create a dockerfile#
On your Docker box create a dockerfile with the following contents
1 # We use the microsoft/dotnet image as a starting point. 2 FROM microsoft/dotnet 3 4 # Install git 5 RUN apt-get install git -y 6 7 # Create a folder to clone our source code 8 RUN mkdir repositories 9 10 # Set our working folder 11 WORKDIR repositories 12 13 # Clone the source code 14 RUN git clone https://github.com/cmendible/aspnet-core-helloworld.git 15 16 # Set our working folder 17 WORKDIR aspnet-core-helloworld/src/dotnetstarter 18 19 # Expose port 5000 for the application. 20 EXPOSE 5000 21 22 # Restore nuget packages 23 RUN dotnet restore 24 25 # Start the application using dotnet!!! 26 ENTRYPOINT dotnet run
2. Create a docker image#
With the dockerfile in place run the following command
1 sudo docker buildÂ -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
1 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
1 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/main/docker.helloworld
Hope it helps!