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Release Notes for .NET 10.0 containers

.NET 10.0

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Abstract

The Release Notes for .NET 10.0 containers provide high-level coverage of the features and functionality that comprise the .NET 10.0 platform and document known problems in this release.

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Chapter 1. Container images
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Build and run your .NET applications using official container images provided by Red Hat. These images provide the necessary Software Development Kit (SDK) for compiling code or lightweight runtimes for deploying framework-dependent applications.

The following container images are available for .NET 10.0:

  • registry.access.redhat.com/ubi9/dotnet-100: Contains the .NET 10.0 SDK, which is used to build .NET applications and libraries.
  • registry.access.redhat.com/ubi9/dotnet-100-runtime: Contains the .NET 10.0 runtime. Use this image as a base for framework-dependent .NET 10.0 applications that do not require the ASP.NET Core runtime.
  • registry.access.redhat.com/ubi9/dotnet-100-aspnet: Contains the ASP.NET Core 10.0 and .NET 10.0 runtimes. Use this image as a base for framework-dependent ASP.NET Core 10.0 applications.

Chapter 2. New features in .NET 10.0 containers
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The Release Notes for .NET 10.0 containers is an extension of the Release Notes for .NET 10.0 RPM packages. For details about the core RPM packages, including general known issues, operating system architecture, privacy, and support policies, see the Release Notes for .NET 10.0 RPM packages.

The .NET 10.0 container images include the following new features:

  • .NET 10.0 container images are now based on Red Hat Universal Base Image (UBI) 9. This is a platform update from previous .NET container images, which were based on UBI 8.
  • An additional, smaller runtime image (ubi9/dotnet-100-runtime) is provided for running non-ASP.NET Core applications.

Chapter 3. Known issues for containers
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Red Hat .NET container images are optimized for minimal footprint and security, which results in differences from standard environments. For instance, to reduce image size, full-featured package managers are replaced with lightweight alternatives.

The following known issues apply to the .NET 10.0 container images:

  1. The dnf command is not available

    To reduce image size, the .NET 10.0 container images are based on the ubi-minimal base image instead of the standard ubi image. The ubi-minimal image provides microdnf as its package manager, not dnf.

    If your Dockerfiles or Containerfiles use the dnf command, you must update them to use microdnf instead.

    For more information, see the microdnf(8) man page.

  2. UBI-prefixed repositories no longer use .NET version tags

    The UBI-prefixed repositories (for example, ubi9/dotnet-100 and ubi9/dotnet-100-runtime) no longer include tags for the .NET version.

    Following the standard for UBI repositories, tagging is now based on the RHEL version. To get the latest version, either omit the tag (which defaults to latest) or explicitly use the latest tag.

  3. ASP.NET Core runtime is in a separate image

    Starting with .NET 10.0, the .NET runtime images (for example, registry.access.redhat.com/ubi9/dotnet-100-runtime) no longer include the ASP.NET Core runtime.

    If your application requires the ASP.NET Core runtime, you must use the new ASP.NET Core runtime image (for example, registry.access.redhat.com/ubi9/dotnet-100-aspnet).

  4. ASP.NET Core runtime is in a separate ImageStream

    Starting with .NET 10.0, the s2i-dotnetcore OpenShift dotnet-runtime ImageStream no longer includes the ASP.NET Core runtime.

    If your application requires the ASP.NET Core runtime, you must use the new dotnet-aspnet ImageStream instead.

For a list of known issues related to the core RPM packages, see the Known Issues section in the .NET 10.0 Release Notes for .NET 10.0 RPM packages.

Legal Notice
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