A compatible SDK version was not found

[AnthonyMastrean]

For local development, we're stuck on the last .NET Core SDK 2.2 version that supports VS2017 (that's 2.2.110 as of writing this).

I thought I'd use a global.json with the "latestPatch" strategy.

{
    "sdk": {
        "allowPrerelease": false,
        "rollForward": "latestPatch",
        "version": "2.2.110"
    }
}

But, now my CI pipeline can't build the same app using the official Docker image.

A compatible SDK version for global.json version: [2.2.110] from [/build/global.json] was not found
Did you mean to run dotnet SDK commands? Please install dotnet SDK from:
  https://go.microsoft.com/fwlink/?LinkID=798306&clcid=0x409

The Docker image uses the 2.2.207 version.

$ docker run --rm mcr.microsoft.com/dotnet/core/sdk:2.2 dotnet --info
.NET Core SDK (reflecting any global.json):
 Version:   2.2.207   
 Commit:    f7b16a2cd5

Runtime Environment:  
 OS Name:     debian  
 OS Version:  9       
 OS Platform: Linux   
 RID:         debian.9-x64
 Base Path:   /usr/share/dotnet/sdk/2.2.207/

Host (useful for support):
  Version: 2.2.8
  Commit:  b9aa1abc51

.NET Core SDKs installed:
  2.2.207 [/usr/share/dotnet/sdk]

.NET Core runtimes installed:
  Microsoft.AspNetCore.All 2.2.8 [/usr/share/dotnet/shared/Microsoft.AspNetCore.All]
  Microsoft.AspNetCore.App 2.2.8 [/usr/share/dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 2.2.8 [/usr/share/dotnet/shared/Microsoft.NETCore.App]

To install additional .NET Core runtimes or SDKs:
  https://aka.ms/dotnet-download

So, I switched the global.json to use "latestFeature". But, that still doesn't work. I don't know what I'm doing wrong and I, apparently, am not grokking the rules in this article.

https://docs.microsoft.com/en-us/dotnet/core/tools/global-json?tabs=netcore2x#matching-rules

[AnthonyMastrean]

Wait a minute, is rollForward basically not supported in .NET Core 2.2? Is that what I'm reading? So, now I can have a global.json to control local development setup but I can't use the same in a Dockerfile. I basically have to ignore the global.json or make a custom SDK image?