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Removing the 9pfs nix store.

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The experiment was good for mounting directories with various overlay patterns from the host to the guest, but using it specifically for /nix/store was a bad idea. It would be better to just serve the host nix store with nix-serve -p 8080 and add that as a substituter during install.
This commit is contained in:
Tom Alexander 2025-05-10 20:40:49 -04:00
parent e65504b5f3
commit 5b7cae49c3
Signed by: talexander
GPG Key ID: D3A179C9A53C0EDE
3 changed files with 0 additions and 82 deletions
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1
nix/configuration/configuration.nix
View File

@ -9,7 +9,6 @@
{
imports = [
./roles/2ship2harkinian
./roles/9pfs_nix_store
./roles/alacritty
./roles/ansible
./roles/ares

4
nix/configuration/flake.nix
View File

@ -126,7 +126,6 @@
isoImage.makeUsbBootable = true;
me.buildingIso = true;
me.optimizations.enable = nixpkgs.lib.mkDefault false;
me._9pfs_nix_store.is_iso = true;
}
{
# These are big space hogs. The chance that I need them on an ISO is slim.
@ -141,9 +140,6 @@
networking.useDHCP = true;
me.optimizations.enable = nixpkgs.lib.mkDefault false;
}
{
# me._9pfs_nix_store.enable = true;
}
];
in
{

77
nix/configuration/roles/9pfs_nix_store/default.nix
View File

@ -1,77 +0,0 @@
{
config,
lib,
pkgs,
...
}:
{
imports = [ ];
options.me = {
_9pfs_nix_store.enable = lib.mkOption {
type = lib.types.bool;
default = false;
example = true;
description = "Whether we want to mount /nix/store over 9pfs (useful in virtual machines to share a directory from the host as a persistent nix store.";
};
_9pfs_nix_store.is_iso = lib.mkOption {
type = lib.types.bool;
default = false;
example = true;
description = "Whether this build is for an ISO. It changes how we mount the nix store.";
};
};
config = lib.mkIf config.me._9pfs_nix_store.enable (
lib.mkMerge [
(lib.mkIf config.me._9pfs_nix_store.is_iso {
# fileSystems = {
# "/nix/store" = lib.mkForce {
# fsType = "overlay";
# device = "overlay";
# options = [
# "lowerdir=/nix/.ro-store"
# "upperdir=/store"
# "workdir=/work"
# ];
# depends = [
# "/nix/.ro-store"
# "/store"
# "/work"
# ];
# };
# "/store" = lib.mkForce {
# fsType = "9p";
# device = "nixstore";
# options = [
# "trans=virtio"
# "version=9p2000.L"
# "x-systemd.requires=modprobe@9pnet_virtio.service"
# "msize=16384" # Maximum packet size. Increasing this should improve performance at the cost of increased memory usage.
# "cache=loose"
# ];
# };
# };
})
(lib.mkIf (!config.me._9pfs_nix_store.is_iso) {
fileSystems = {
"/nix/store" = lib.mkForce {
fsType = "9p";
device = "nixstore";
neededForBoot = true;
options = [
"trans=virtio"
"version=9p2000.L"
"x-systemd.requires=modprobe@9pnet_virtio.service"
"msize=16384" # Maximum packet size. Increasing this should improve performance at the cost of increased memory usage.
"cache=loose"
];
};
};
})
]
);
}