$WSL_DISTRO_NAME does not exists after sudo -i

[herbert256]

Environment

Windows build number: 10.0.19041.0
Your Distribution version: 1 Debian GNU/Linux 10 (buster) / imported from https://salsa.debian.org/debian/WSL/-/raw/master/x64/install.tar.gz
Whether the issue is on WSL 2 and/or WSL 1: WSL 2, Linux version 4.19.104-microsoft-standard (oe-user@oe-host) (gcc version 8.2.0 (GCC)) #1 SMP Wed Feb 19 06:37:35 UTC 2020

Description

When I enter the distro with user root the environment variabele $WSL_DISTRO_NAME does exists

When I enter the distro with the default user and then go to the root user with sudo -i or sudo su - root the environment variabele $WSL_DISTRO_NAME does not exists

Steps to reproduce

wsl -d distro -u root
echo $WSL_DISTRO_NAME
*distro name here*

wsl -d distro
sudo -i
echo $WSL_DISTRO_NAME
*no distro name here*

[0xbadfca11]

This is the correct behavior of sudo.
See man of sudoers(5).

[herbert256]

sudo -i is supose to work as a new login, imho that means the result should be the same as directly login as root with 'wsl -d distro -u root'

wsl -d distro -u root  # $WSL_DISTRO_NAME does exists

wsl -d distro -u user
sudo -i                # $WSL_DISTRO_NAME does not exists

[therealkenc]

How sudo(1) is "supposed to work" is not dictated by WSL, your h.o. notwithstanding.

You probably want Defaults env_keep=WSL_DISTRO_NAME in your sudoers(5), as 0xbadfca11 was implying.