Release Notes for .NET 6.0 containers

.NET 6.0

Red Hat Customer Content Services

Abstract

The Release Notes for .NET 6.0 containers provide high-level coverage of the features and functionality that comprise the .NET 6.0 platform and document known problems in this release.

Making open source more inclusive

Red Hat is committed to replacing problematic language in our code, documentation, and web properties. We are beginning with these four terms: master, slave, blacklist, and whitelist. Because of the enormity of this endeavor, these changes will be implemented gradually over several upcoming releases. For more details, see our CTO Chris Wright’s message.

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Chapter 1. New features

The Release Notes for .NET 6.0 containers is an extension of the Release Notes for .NET 6.0 RPM packages. See Release Notes for .NET 6.0 RPM packages for information about known issues, the operating system architecture, privacy, and support.

Chapter 2. Known issues

  1. ReadyToRun, which is enabled on a source-to-image build via the DOTNET_PUBLISH_READYTORUN environment variable, is not supported on s390x. The build will print a warning and ignore this variable.
  2. The SDK image contains nodeJS to support building JavaScript front-ends in tandem with the .NET backend. Some JavaScript web front-ends cannot be built on s390x and aarch64 due to missing nodeJS packages.

  3. .NET 6.0 on s390x does not understand memory and cpu limits in containers.

    In such environments, it is possible that .NET 6.0 will try to use more memory than allocated to the container, causing the container to get killed or restarted in OpenShift Container Platform. As a workaround you can manually specify a heap limit through an environment variable: MONO_GC_PARAMS=max-heap-size=<limit>. You should set the limit to 75% of the memory allocated to the container. For example, if the container memory limit is 300MB, set MONO_GC_PARAMS=max-heap-size=225M.

See Known Issues in the .NET 6.0 Release Notes for .NET 6.0 RPM packages for a list of known issues and workarounds for RPMs.

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