ASP.NET Core Runtime 9.0 container image

Description

.NET is a general purpose development platform. It is cross-platform, and can be used in devices, cloud, and embedded/IoT scenarios. You can use C# or F# to write .NET applications.

This image contains the ASP.NET Core and .NET runtimes and libraries, and it is optimized for running ASP.NET Core applications in production.

Notice

The .NET packages in the image come from a third-party repository packages.microsoft.com.

The source code is available on github.com/dotnet.

SUSE does not provide any support or warranties for the third-party components in the image.

Usage

To compile and deploy an application, copy the sources and build the binary:

FROM registry.suse.com/bci/dotnet-sdk:9.0 AS build
WORKDIR /source

# copy csproj and restore as distinct layers
COPY aspnetapp/*.csproj .
RUN dotnet restore

# copy and publish app and libraries
COPY aspnetapp/. .
RUN dotnet publish --no-restore -o /app

# final image
FROM registry.suse.com/bci/dotnet-aspnet:9.0

WORKDIR /app
COPY --from=build /app .

EXPOSE 8080

# uncomment to run as non-root user
# USER $APP_UID

ENTRYPOINT ["./aspnetapp"]

Build and run the container image:

podman build -t my-aspnet-app .
podman run -it --rm -p 8080:8080 my-aspnet-app

HTTPS and certificates

ASP.NET Core uses HTTPS by default. You need a valid certificate for production deployments.

To create a self-signed certificate for testing, use the following command:

podman run --rm -it -v "$PWD/https":/https:Z \
    registry.suse.com/bci/dotnet-sdk:9.0 \
    dotnet dev-certs https -ep /https/aspnetapp.pfx -p <PASSWORD>

To use a certificate and run the container image with ASP.NET Core configured for HTTPS in development or production, use the following command:

podman run --rm -it -p 8081:8081 \
    -e ASPNETCORE_HTTPS_PORTS=8081 \
    -e ASPNETCORE_Kestrel__Certificates__Default__Password="<PASSWORD>" \
    -e ASPNETCORE_Kestrel__Certificates__Default__Path=/https/aspnetapp.pfx \
    -v "$PWD/https":/https:Z my-apsnet-app

Globalization

.NET includes globalization capabilities, including support for processing natural language text, calendars, currency, and timezones. The .NET implementation for these capabilities is based on system libraries available in the container image, such as International Components for Unicode (ICU) and tzdata.

It's considered a good practice to pass timezone information into a container via environment variable TZ.

podman run --rm -it -e TZ="Europe/Berlin" app

Licensing

SPDX-License-Identifier: MIT

This documentation and the build recipe are licensed as MIT. The container itself contains various software components under various open source licenses listed in the associated Software Bill of Materials (SBOM).

This image is a tech preview. Do not use it for production. Your feedback is welcome. Please report any issues to the SUSE Bugzilla.