101 lines
3.4 KiB
Nix
101 lines
3.4 KiB
Nix
{ config, pkgs, lib, ... }:
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with lib;
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let
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cfg = config.programs.singularity;
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in
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{
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options.programs.singularity = {
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enable = mkEnableOption "singularity" // {
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description = ''
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Whether to install Singularity/Apptainer with system-level overriding such as SUID support.
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'';
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};
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package = mkPackageOption pkgs "singularity" {
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example = "apptainer";
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};
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packageOverriden = mkOption {
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type = types.nullOr types.package;
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default = null;
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description = ''
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This option provides access to the overridden result of `programs.singularity.package`.
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For example, the following configuration makes all the Nixpkgs packages use the overridden `singularity`:
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```Nix
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{ config, lib, pkgs, ... }:
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{
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nixpkgs.overlays = [
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(final: prev: {
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_singularity-orig = prev.singularity;
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singularity = config.programs.singularity.packageOverriden;
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})
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];
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programs.singularity.enable = true;
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programs.singularity.package = pkgs._singularity-orig;
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}
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```
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Use `lib.mkForce` to forcefully specify the overridden package.
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'';
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};
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enableExternalLocalStateDir = mkOption {
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type = types.bool;
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default = true;
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example = false;
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description = ''
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Whether to use top-level directories as LOCALSTATEDIR
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instead of the store path ones.
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This affects the SESSIONDIR of Apptainer/Singularity.
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If set to true, the SESSIONDIR will become
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`/var/lib/''${projectName}/mnt/session`.
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'';
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};
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enableFakeroot = mkOption {
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type = types.bool;
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default = true;
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example = false;
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description = ''
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Whether to enable the `--fakeroot` support of Singularity/Apptainer.
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'';
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};
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enableSuid = mkOption {
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type = types.bool;
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# SingularityCE requires SETUID for most things. Apptainer prefers user
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# namespaces, e.g. `apptainer exec --nv` would fail if built
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# `--with-suid`:
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# > `FATAL: nvidia-container-cli not allowed in setuid mode`
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default = cfg.package.projectName != "apptainer";
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defaultText = literalExpression ''config.services.singularity.package.projectName != "apptainer"'';
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example = false;
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description = ''
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Whether to enable the SUID support of Singularity/Apptainer.
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'';
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};
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};
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config = mkIf cfg.enable {
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programs.singularity.packageOverriden = (cfg.package.override (
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optionalAttrs cfg.enableExternalLocalStateDir {
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externalLocalStateDir = "/var/lib";
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} // optionalAttrs cfg.enableFakeroot {
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newuidmapPath = "/run/wrappers/bin/newuidmap";
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newgidmapPath = "/run/wrappers/bin/newgidmap";
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} // optionalAttrs cfg.enableSuid {
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enableSuid = true;
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starterSuidPath = "/run/wrappers/bin/${cfg.package.projectName}-suid";
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}
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));
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environment.systemPackages = [ cfg.packageOverriden ];
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security.wrappers."${cfg.packageOverriden.projectName}-suid" = mkIf cfg.enableSuid {
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setuid = true;
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owner = "root";
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group = "root";
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source = "${cfg.packageOverriden}/libexec/${cfg.packageOverriden.projectName}/bin/starter-suid.orig";
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};
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systemd.tmpfiles.rules = mkIf cfg.enableExternalLocalStateDir [
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"d /var/lib/${cfg.packageOverriden.projectName}/mnt/session 0770 root root -"
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];
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};
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}
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