Legacy images need to be updated

[richlander]

This repo has references to CentOS 8, Ubuntu 18.04, and Ubuntu 20.04. We don't support any of those versions any longer.

Please consider moving to CentOS Stream 10 and Ubuntu 24.04.

We don't produce the mlnet images any longer. It would be good to understand what the need is for that image flavor.

@ilyas1974 @ericstj

[ericstj]

Some recent related work: https://github.com/dotnet/machinelearning/pull/7410 https://github.com/dotnet/machinelearning/pull/6703

The mlnet images are required which add additional dependencies needed to run MLNET (tests) and I think we still build many of them --> https://github.com/search?q=repo%3Adotnet%2Fdotnet-buildtools-prereqs-docker+path%3Amlnet&type=code

[richlander]

OK. I was mistaken on that (mlnet images). I'll try to identify the specific places that need updating.

[ericstj]

Looks to me like we are using: https://github.com/dotnet/machinelearning/blob/52e0db199b82f2aee20f479022b8544c2dd6892b/.vsts-dotnet-ci.yml#L40 https://github.com/dotnet/machinelearning/blob/52e0db199b82f2aee20f479022b8544c2dd6892b/.vsts-dotnet-ci.yml#L43 https://github.com/dotnet/machinelearning/blob/52e0db199b82f2aee20f479022b8544c2dd6892b/.vsts-dotnet-ci.yml#L46 https://github.com/dotnet/machinelearning/blob/52e0db199b82f2aee20f479022b8544c2dd6892b/.vsts-dotnet-ci.yml#L49 https://github.com/dotnet/machinelearning/blob/52e0db199b82f2aee20f479022b8544c2dd6892b/.vsts-dotnet-ci.yml#L73 https://github.com/dotnet/machinelearning/blob/52e0db199b82f2aee20f479022b8544c2dd6892b/.vsts-dotnet-ci.yml#L96 https://github.com/dotnet/machinelearning/blob/52e0db199b82f2aee20f479022b8544c2dd6892b/.vsts-dotnet-ci.yml#L107 https://github.com/dotnet/machinelearning/blob/52e0db199b82f2aee20f479022b8544c2dd6892b/.vsts-dotnet-ci.yml#L118

And for official build https://github.com/dotnet/machinelearning/blob/52e0db199b82f2aee20f479022b8544c2dd6892b/build/vsts-ci.yml#L65 https://github.com/dotnet/machinelearning/blob/52e0db199b82f2aee20f479022b8544c2dd6892b/build/vsts-ci.yml#L67 https://github.com/dotnet/machinelearning/blob/52e0db199b82f2aee20f479022b8544c2dd6892b/build/vsts-ci.yml#L69

So it sounds like all those ubuntu 18.04 need to move to 22.04, what about centos stream8?