Update 2.1 Alpine images to be based on to latest

[MichaelSimons]

The 2.1 preview Alpine images are based on 3.6 - e.g. https://github.com/dotnet/dotnet-docker/blob/master/2.1/runtime/alpine/amd64/Dockerfile. This should be changed to the latest version of Alpine - 3.7. Depending on when 2.1 ships, 3.8 may be available.

This change is dependent on the completion of https://github.com/dotnet/core-setup/issues/3817

[richlander]

This is "edge" in https://wiki.alpinelinux.org/wiki/Alpine_Linux:Releases

[yang-xiaodong]

Alpine images are not supported Culture ?

[MichaelSimons]

Globalization is disabled by default with Alpine images in order to produce smaller images. You can re-enable globalization if your application relies on it. See the Alpine samples for how to do this.

[robertmiles3]

Any ETA on getting the dotnet docker images to Alpine 3.8? Looks like it came out about 6 weeks ago so was just wondering (am needing it because it bumps chromium from v61 to v68).

[MichaelSimons]

@robertmiles3 - The Docker images for Alpine 3.8 are currently blocked on .NET Core officially supporting 3.8. This is actively being worked on. I don't have an ETA as of now.

[robertmiles3]

Gotcha, thanks for the update.

[altinnadmin]

@robertmiles3 Isn't 3.8 already supported?

Ref. https://docs.microsoft.com/en-us/dotnet/core/linux-prerequisites?tabs=netcore2x
NET Core 2.1 is supported on the following Linux distributions/versions:

• Alpine Linux 3.7 or later versions - 64-bit

[robertmiles3]

@altinnadmin Yes, 3.8 is supported for runtimes but that's not what I'm referring to. I'm referring to the base dotnet docker images getting bumped up to 3.8.

[MichaelSimons]

Closing this issue and using #742 to track the Alpine 3.8 specific images.