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120 lines
3.2 KiB
Nix
120 lines
3.2 KiB
Nix
# LXC Configuration
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{
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config,
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lib,
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pkgs,
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...
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}:
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let
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cfg = config.virtualisation.lxc;
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in
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{
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meta = {
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maintainers = lib.teams.lxc.members;
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};
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options.virtualisation.lxc = {
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enable = lib.mkOption {
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type = lib.types.bool;
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default = false;
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description = ''
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This enables Linux Containers (LXC), which provides tools
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for creating and managing system or application containers
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on Linux.
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'';
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};
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unprivilegedContainers = lib.mkEnableOption "support for unprivileged users to launch containers";
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systemConfig = lib.mkOption {
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type = lib.types.lines;
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default = "";
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description = ''
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This is the system-wide LXC config. See
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{manpage}`lxc.system.conf(5)`.
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'';
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};
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package = lib.mkPackageOption pkgs "lxc" { };
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defaultConfig = lib.mkOption {
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type = lib.types.lines;
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default = "";
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description = ''
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Default config (default.conf) for new containers, i.e. for
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network config. See {manpage}`lxc.container.conf(5)`.
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'';
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};
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usernetConfig = lib.mkOption {
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type = lib.types.lines;
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default = "";
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description = ''
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This is the config file for managing unprivileged user network
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administration access in LXC. See {manpage}`lxc-usernet(5)`.
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'';
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};
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bridgeConfig = lib.mkOption {
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type = lib.types.lines;
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default = "";
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description = ''
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This is the config file for override lxc-net bridge default settings.
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'';
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};
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};
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###### implementation
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config = lib.mkIf cfg.enable {
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environment.systemPackages = [ cfg.package ];
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environment.etc."lxc/lxc.conf".text = cfg.systemConfig;
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environment.etc."lxc/lxc-usernet".text = cfg.usernetConfig;
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environment.etc."lxc/default.conf".text = cfg.defaultConfig;
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environment.etc."lxc/lxc-net".text = cfg.bridgeConfig;
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environment.pathsToLink = [ "/share/lxc" ];
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systemd.tmpfiles.rules = [ "d /var/lib/lxc/rootfs 0755 root root -" ];
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security.apparmor.packages = [ cfg.package ];
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security.apparmor.policies = {
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"bin.lxc-start".profile = ''
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include ${cfg.package}/etc/apparmor.d/usr.bin.lxc-start
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'';
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"lxc-containers".profile = ''
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include ${cfg.package}/etc/apparmor.d/lxc-containers
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'';
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};
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# We don't need the `lxc-user` group, unless the unprivileged containers are enabled.
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users.groups = lib.mkIf cfg.unprivilegedContainers { lxc-user = { }; };
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# `lxc-user-nic` needs suid to attach to bridge for unpriv containers.
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security.wrappers = lib.mkIf cfg.unprivilegedContainers {
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lxcUserNet = {
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source = "${pkgs.lxc}/libexec/lxc/lxc-user-nic";
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setuid = true;
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owner = "root";
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group = "lxc-user";
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program = "lxc-user-nic";
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permissions = "u+rx,g+x,o-rx";
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};
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};
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# Add lxc-net service if unpriv mode is enabled.
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systemd.packages = lib.mkIf cfg.unprivilegedContainers [ pkgs.lxc ];
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systemd.services = lib.mkIf cfg.unprivilegedContainers {
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lxc-net = {
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enable = true;
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wantedBy = [ "multi-user.target" ];
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path = [
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pkgs.iproute2
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pkgs.iptables
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pkgs.getent
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pkgs.dnsmasq
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];
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};
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};
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};
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}
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