Dropping support for .NET Core Docker for Windows ARM32 architecture

[mthalman]

Dropping support for .NET Core Docker for Windows ARM32 architecture

The .NET team will no longer produce and support .NET Core Docker images for the Windows ARM32 architecture, as of May 12, 2020. This change only affects Windows version 1809, which is currently the only Windows version available for ARM32. At this time, there are no plans to provide .NET Docker images for the Windows ARM32 architecture going forward. This change was made due to low usage of this image variant.

We will continue supporting ARM32 and ARM64 images for Linux, and no change in that support is expected or planned.

If you would like to author your own Dockerfile to support this architecture, check out Installing .NET Core in a Dockerfile. The last published version of the .NET Core Dockerfiles for Windows 1809 ARM can be found in commit 5e9b849. For example, .NET Core 3.1 runtime Dockerfile.

The following Docker tags are affected and will still be available to pull but will no longer be updated or serviced:

• mcr.microsoft.com/dotnet/core/runtime:3.1.3-nanoserver-1809-arm32v7
• mcr.microsoft.com/dotnet/core/runtime:3.1-nanoserver-1809-arm32v7
• mcr.microsoft.com/dotnet/core/aspnet:3.1.3-nanoserver-1809-arm32v7
• mcr.microsoft.com/dotnet/core/aspnet:3.1-nanoserver-1809-arm32v7
• mcr.microsoft.com/dotnet/core/sdk:3.1.201-nanoserver-1809-arm32v7
• mcr.microsoft.com/dotnet/core/sdk:3.1-nanoserver-1809-arm32v7

Any attempt to pull the following multi-arch Docker tags on a Windows ARM machine will result in an error similar to no matching manifest for windows/arm32 in the manifest list entries because a Windows ARM image will no longer be available for that tag:

• mcr.microsoft.com/dotnet/core/runtime:3.1.3
• mcr.microsoft.com/dotnet/core/runtime:3.1
• mcr.microsoft.com/dotnet/core/runtime:latest
• mcr.microsoft.com/dotnet/core/aspnet:3.1.3
• mcr.microsoft.com/dotnet/core/aspnet:3.1
• mcr.microsoft.com/dotnet/core/aspnet:latest
• mcr.microsoft.com/dotnet/core/sdk:3.1.201
• mcr.microsoft.com/dotnet/core/sdk:3.1
• mcr.microsoft.com/dotnet/core/sdk:latest