Скачать или смотреть How to Create a .NET 6 Docker Container with Hot Reload

Learn how to set up a `.NET 6` Docker container that enables `hot reload` for seamless development. Follow our step-by-step guide for quick configuration!
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This video is based on the question https://stackoverflow.com/q/69911027/ asked by the user 'ddruganov' ( https://stackoverflow.com/u/5320740/ ) and on the answer https://stackoverflow.com/a/69911028/ provided by the user 'ddruganov' ( https://stackoverflow.com/u/5320740/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Introduction

As a developer, you may encounter challenges when setting up a .NET 6 environment within a Docker container, particularly when you want to utilize the convenient feature of hot reloading via dotnet watch run. If you've tried to do this, you might have run into various issues such as incorrect port configurations, build problems related to watch, or complications in copying your project files.

This guide aims to walk you through the process of creating a .NET 6 Docker container that effectively leverages hot reloading, allowing you to streamline your development workflow. Let’s dive into the steps you need to take to get everything up and running smoothly.

Step-by-Step Guide to Setting Up Your Docker Container

1. Create a New .NET Project

First, set up your development environment by generating a new web API project. Run the following command:

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Replace YOURPROJECTNAME with your desired project name. This command establishes a basic API template that you will build upon.

2. Setting Up docker-compose.yml

Within your newly created project directory, create a file named docker-compose.yml. This file orchestrates the services needed for your application. Use the following configuration as a starting point:

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Replace YOURIMAGENAME with an appropriate name for your Docker image.

3. Create a Dockerfile

Next, you will need to create a Dockerfile in the same directory. This file contains the steps for building your Docker image. Here is a basic example to get started:

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This Dockerfile is set up to:

Use the .NET 6 SDK base image.

Set the working directory to /app.

Copy your project files into the container.

Restore any necessary packages.

Start the application with hot reload enabled, listening on port 8080.

4. Create a .dockerignore File

To optimize your Docker build process, add a .dockerignore file to avoid copying unnecessary files into the container. This file should include:

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These folders usually contain compiled binaries and other artifacts that are not necessary during development.

5. Build and Run Your Docker Container

With everything set up, you can now build and run your Docker container. Use the following command:

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This command will start your containerized application and enable hot reloading, allowing you to make changes to your code without needing to restart the server manually.

Conclusion

Congratulations! You have successfully created a .NET 6 Docker container with hot reloading enabled. This setup allows for an efficient development cycle, where you can see your changes reflected immediately in your running API.

If you encounter any issues along the way, consider revisiting your configuration files or checking Docker's and .NET's documentation for troubleshooting tips. Happy coding!