ps2goat · August 9, 2023 18:40 · ps2goat · Aug 9, 2023
diff --git a/wsl.conf b/wsl.conf
 [boot]
    command="printf \"nameserver 1.1.1.1\n$(cat /etc/resolv.conf)\nnameserver 8.8.8.8\nnameserver 1.0.0.1\n\" > /etc/resolv.conf"
    
 # Where does this go?
 #   In each WSL2 distribution, add this to your `/etc/wsl.conf` file.
 #
 # What this does:
 # Writes 3 nameservers to your WSL2 distribution, and inserts the dynamic nameserver (the WSL2 -> Windows bridge) from
 #   /etc/resolv.conf at level 2, and re-writes all that to the same /etc/resolv.conf file.
 #
 # 1. A subprocess reads the contents of the newly created file at boot, which has the bridge IP in it 
 #       by default. `$(cat /etc/resolv.conf)`
 # 2. The `printf` command injects the result of that after the first nameserver, and before the other two (configure as needed)
 # 3. The value to print is surrounded with double quotes, so that variable substitution can happen. 
 #       These are already in double quotes due to `command = "<full command>"`, so they are escaped: `\"`
 # 4. The results of what is printed are written back to `/etc/resolv.conf`.
 #
 # Why?
 # I had several issues with DNS inside the Linux distribution (several Ubuntu versions). For example,
 #   terraform provider lookup failed after a few tries and it only tries twice (thus I put the public nameserver 
 #   before the Windows bridge).
 # I don't remember where I saw that specific number of DNS attempts, but Possible Cause #3 at this link seems to be the reason.
 #   https://support.hashicorp.com/hc/en-us/articles/5511799316243-Error-Failed-to-query-available-provider-packages
 #
 # Comments were added to this file only to keep them at the start-- the original thread I responded to only loads later comments
 #   and you have to manually click "Load earlier comments" to see the author's initial comment!
 # Original post was made here: 
 #   https://gist.github.com/coltenkrauter/608cfe02319ce60facd76373249b8ca6?permalink_comment_id=4263955#gistcomment-4263955
	[boot]
	command="printf \"nameserver 1.1.1.1\n$(cat /etc/resolv.conf)\nnameserver 8.8.8.8\nnameserver 1.0.0.1\n\" > /etc/resolv.conf"

	# Where does this go?
	# In each WSL2 distribution, add this to your `/etc/wsl.conf` file.
	#
	# What this does:
	# Writes 3 nameservers to your WSL2 distribution, and inserts the dynamic nameserver (the WSL2 -> Windows bridge) from
	# /etc/resolv.conf at level 2, and re-writes all that to the same /etc/resolv.conf file.
	#
	# 1. A subprocess reads the contents of the newly created file at boot, which has the bridge IP in it
	# by default. `$(cat /etc/resolv.conf)`
	# 2. The `printf` command injects the result of that after the first nameserver, and before the other two (configure as needed)
	# 3. The value to print is surrounded with double quotes, so that variable substitution can happen.
	# These are already in double quotes due to `command = "<full command>"`, so they are escaped: `\"`
	# 4. The results of what is printed are written back to `/etc/resolv.conf`.
	#
	# Why?
	# I had several issues with DNS inside the Linux distribution (several Ubuntu versions). For example,
	# terraform provider lookup failed after a few tries and it only tries twice (thus I put the public nameserver
	# before the Windows bridge).
	# I don't remember where I saw that specific number of DNS attempts, but Possible Cause #3 at this link seems to be the reason.
	# https://support.hashicorp.com/hc/en-us/articles/5511799316243-Error-Failed-to-query-available-provider-packages
	#
	# Comments were added to this file only to keep them at the start-- the original thread I responded to only loads later comments
	# and you have to manually click "Load earlier comments" to see the author's initial comment!
	# Original post was made here:
	# https://gist.github.com/coltenkrauter/608cfe02319ce60facd76373249b8ca6?permalink_comment_id=4263955#gistcomment-4263955