nixpkgs/nixos/modules/virtualisation/lxcfs.nix

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# LXC Configuration
{
config,
lib,
pkgs,
...
}:
let
cfg = config.virtualisation.lxc.lxcfs;
in
{
meta = {
maintainers = lib.teams.lxc.members;
};
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###### interface
options.virtualisation.lxc.lxcfs = {
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enable = lib.mkOption {
type = lib.types.bool;
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default = false;
description = ''
This enables LXCFS, a FUSE filesystem for LXC.
To use lxcfs in include the following configuration in your
container configuration:
```
virtualisation.lxc.defaultConfig = "lxc.include = ''${pkgs.lxcfs}/share/lxc/config/common.conf.d/00-lxcfs.conf";
```
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'';
};
};
###### implementation
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config = lib.mkIf cfg.enable {
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systemd.services.lxcfs = {
description = "FUSE filesystem for LXC";
wantedBy = [ "multi-user.target" ];
before = [ "lxc.service" ];
restartIfChanged = false;
serviceConfig = {
ExecStartPre = "${pkgs.coreutils}/bin/mkdir -p /var/lib/lxcfs";
ExecStart = "${pkgs.lxcfs}/bin/lxcfs /var/lib/lxcfs";
ExecStopPost = "-${pkgs.fuse}/bin/fusermount -u /var/lib/lxcfs";
KillMode = "process";
Restart = "on-failure";
};
};
};
}