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nixos/initrd-network: fix /etc/resolv.conf when multiple dns servers from DHCP #101099

merged 1 commit into from Oct 20, 2020


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@rissson rissson commented Oct 19, 2020

Motivation for this change

Currently, when doing DNS resolution inside stage 1 when the DHCP server responded with multiple DNS servers, it fails because /etc/resolv.conf contains something like this:

Things done
  • Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS linux)
  • Built on platform(s)
    • NixOS
    • macOS
    • other Linux distributions
  • Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
  • Tested compilation of all pkgs that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review wip"
  • Tested execution of all binary files (usually in ./result/bin/)
  • Determined the impact on package closure size (by running nix path-info -S before and after)
  • Ensured that relevant documentation is up to date
  • Fits
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@rissson rissson commented Oct 19, 2020

I am in the process of testing this. Will report back ASAP and backport to 20.09.

…from DHCP

Signed-off-by: Marc 'risson' Schmitt <>
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@rissson rissson commented Oct 19, 2020

I just tested that, it works!

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@jonringer jonringer left a comment

your changes look like the intended behavior, and aligns with examples of resolv.conf

@jonringer jonringer merged commit 9e6bede into NixOS:master Oct 20, 2020
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@rissson rissson deleted the initrd-network-fix-dhcp-dns-servers branch Oct 20, 2020
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2 participants