Can I create a VLAN on boot.initrd?

podfinkx · April 16, 2020, 1:49pm

Hello NixOS newbie here.

So what I’m triying to accomplish is to create a VLAN on the stage 1 of boot so I can connect to my server via ssh and unlock the luks encrypted root. So I wonder if that is possible?

I already have configured the part of unlocking via ssh but I can’t reach the server because I need to put it on a VLAN, if I introduce the luks key physically I can log and reach the internet just fine and also can log via ssh because I configured a VLAN with networking.vlans but I don’t find a way to configure a VLAN on the initrd.

Anyway thanks in advance to this amazing community, I’m loving NixOS so far

configuration.nix

PD: the link is to ix.io pastebin

Samae · April 18, 2020, 9:47am

Related: initramfs-tools-network-hook/README.md at master · stcz/initramfs-tools-network-hook · GitHub

It seems that it would be needed to add some scripts to the initramfs. Is anyone remotely familiar with how to do this?

podfinkx · April 18, 2020, 9:08pm

Maybe It can be implemented like the ip= definition on boot.kernelParams?

alse how I modify that file on a vm generated from my config to test the changes? I might try to implemented myself and open a pull request when finished.

github.com

NixOS/nixpkgs/blob/e233a9d4dd1484d2b79e496d45f5e785642638ef/nixos/modules/system/boot/initrd-network.nix#L115

    
      
          boot.initrd.extraUtilsCommands = ''
            copy_bin_and_libs ${pkgs.klibc}/lib/klibc/bin.static/ipconfig
          '';
          
          
boot.initrd.preLVMCommands = mkBefore (
            # Search for interface definitions in command line.
            ''
              ifaces=""
              for o in $(cat /proc/cmdline); do
                case $o in
                  ip=*)
                    ipconfig $o && ifaces="$ifaces $(echo $o | cut -d: -f6)"
                    ;;
                esac
              done
            ''
          
          
  # Otherwise, use DHCP.
            + optionalString doDhcp ''
              # Bring up all interfaces.
              for iface in ${dhcpIfShellExpr}; do