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mirror of https://github.com/divnix/digga.git synced 2024-12-23 08:02:21 +03:00
digga/modules/bootstrap-iso.nix
David Arnold 18ea519f0d fix: bootstrap semantics
prior to this commit the bootstrapping iso deactivated _all_ profiles
that were somehow contained in a suite.

that is an error, since it deactivates all profiles, even the most basic
and desired ones.

the impetus had been to prevent unwantes systemd services from launching

however, there seems no reliable approach to achieve that.

the now proposed alternative model is to add a bootsrap host akin to
the followint config:

```nix
# os/hosts/bootstrap.nix
{ profiles, ... }:
{
 imports = [
    profiles.networking
    profiles.users.root
    profiles.users.nixos
  ];
}
```
2022-02-23 15:23:14 -08:00

75 lines
2.4 KiB
Nix

let
getFqdn = config:
let
net = config.networking;
fqdn =
if net.domain != null
then "${net.hostName}.${net.domain}"
else net.hostName;
in
fqdn;
protoModule = fullHostConfig: { config, lib, modulesPath, suites, self, inputs, ... }@args: {
imports = [ "${modulesPath}/installer/cd-dvd/installation-cd-minimal.nix" ];
isoImage.isoBaseName = "bootstrap-" + (getFqdn config);
isoImage.contents = [{
source = self;
target = "/devos/";
}];
isoImage.storeContents = [
self.devShell.${config.nixpkgs.system}
# include also closures that are "switched off" by the
# above profile filter on the local config attribute
fullHostConfig.system.build.toplevel
] ++ builtins.attrValues inputs;
# still pull in tools of deactivated profiles
environment.systemPackages = fullHostConfig.environment.systemPackages;
# confilcts with networking.wireless which might be slightly
# more useful on a stick
networking.networkmanager.enable = lib.mkForce false;
# confilcts with networking.wireless
networking.wireless.iwd.enable = lib.mkForce false;
# Set up a link-local boostrap network
# See also: https://github.com/NixOS/nixpkgs/issues/75515#issuecomment-571661659
networking.usePredictableInterfaceNames = lib.mkForce true; # so prefix matching works
networking.useNetworkd = lib.mkForce true;
networking.useDHCP = lib.mkForce false;
networking.dhcpcd.enable = lib.mkForce false;
systemd.network = {
# https://www.freedesktop.org/software/systemd/man/systemd.network.html
networks."boostrap-link-local" = {
matchConfig = {
Name = "en* wl* ww*";
};
networkConfig = {
Description = "Link-local host bootstrap network";
MulticastDNS = true;
LinkLocalAddressing = "ipv6";
DHCP = "yes";
};
address = [
# fall back well-known link-local for situations where MulticastDNS is not available
"fe80::47" # 47: n=14 i=9 x=24; n+i+x
];
extraConfig = ''
# Unique, yet stable. Based off the MAC address.
IPv6LinkLocalAddressGenerationMode = "eui64"
'';
};
};
};
in
{ config, ... }:
{
system.build = {
bootstrapIso = (config.lib.digga.mkBuild
(protoModule config)
).config.system.build.isoImage;
};
}