Merge #38050 causing a failure?

[EML-github]

I've got a new Win10 installation, and have been the following the Ubuntu tutorial here on installing Docker. This fails at Step 7 with this message:

C:\home\evan\local\docker>.\dockerd.exe -D --data-root C:\lcow
WARN[2019-02-13T18:01:23.679810300Z] cannot set sticky bit on files under XDG_RUNTIME_DIR  error="homedir.StickRuntimeDirContents() is not supported on this system"
failed to load listeners: open //./pipe/docker_engine: Access is denied.

This seems to be from code that was added recently (pull request #38050, "Allow running dockerd as a non-root user", "Set sticky bit if XDG_RUNTIME_DIR is set && the file is actually under XDG_RUNTIME_DIR").

Unfortunately, I know exactly nothing about Windows; I didn't even know it had a sticky bit. I tried running dockerd as a non-root user after reading the comments, but this is no better. However, Windows does now produce a "This app can't run on your PC" popup instead.

I don't suppose that you can throw any light on this?

[AkihiroSuda]

The XDG_RUNTIME_DIR message seems a warning, not an error.

Does v18.09.2 work?

[AkihiroSuda]

Please make sure to execute dockerd.exe in admin command prompt.

Rootless mode is not supported on Windows.

[AkihiroSuda]

@thaJeztah this doesn't seem related to area/rootless

#38725 (comment)

[lowenna]

Right, but the Ubuntu tutorial isn't applicable in any way to Windows. What's the output of docker info and docker version. How did you install docker? Through Docker-For-Windows? From master.dockerproject.org? Are you launching from an elevated command prompt, not a regular-user prompt?

[AkihiroSuda]

I assume this can be closed, let me know if not