127 lines
3.5 KiB
Nix
127 lines
3.5 KiB
Nix
{ config, lib, pkgs, utils, ... }:
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let
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cfg = config.virtualisation.podman;
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toml = pkgs.formats.toml { };
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inherit (lib) mkOption types;
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podmanPackage = (pkgs.podman.override { inherit (cfg) extraPackages; });
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# Provides a fake "docker" binary mapping to podman
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dockerCompat = pkgs.runCommandNoCC "${podmanPackage.pname}-docker-compat-${podmanPackage.version}" {
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outputs = [ "out" "man" ];
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inherit (podmanPackage) meta;
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} ''
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mkdir -p $out/bin
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ln -s ${podmanPackage}/bin/podman $out/bin/docker
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mkdir -p $man/share/man/man1
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for f in ${podmanPackage.man}/share/man/man1/*; do
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basename=$(basename $f | sed s/podman/docker/g)
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ln -s $f $man/share/man/man1/$basename
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done
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'';
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in
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{
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imports = [
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(lib.mkRenamedOptionModule [ "virtualisation" "podman" "libpod" ] [ "virtualisation" "containers" "containersConf" ])
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];
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meta = {
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maintainers = lib.teams.podman.members;
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};
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options.virtualisation.podman = {
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enable =
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mkOption {
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type = types.bool;
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default = false;
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description = ''
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This option enables Podman, a daemonless container engine for
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developing, managing, and running OCI Containers on your Linux System.
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It is a drop-in replacement for the <command>docker</command> command.
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'';
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};
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dockerCompat = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Create an alias mapping <command>docker</command> to <command>podman</command>.
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'';
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};
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enableNvidia = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Enable use of NVidia GPUs from within podman containers.
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'';
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};
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extraPackages = mkOption {
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type = with types; listOf package;
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default = [ ];
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example = lib.literalExample ''
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[
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pkgs.gvisor
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]
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'';
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description = ''
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Extra packages to be installed in the Podman wrapper.
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'';
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};
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package = lib.mkOption {
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type = types.package;
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default = podmanPackage;
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internal = true;
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description = ''
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The final Podman package (including extra packages).
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'';
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};
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};
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config = lib.mkIf cfg.enable (lib.mkMerge [
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{
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environment.systemPackages = [ cfg.package ]
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++ lib.optional cfg.dockerCompat dockerCompat;
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environment.etc."cni/net.d/87-podman-bridge.conflist".source = utils.copyFile "${pkgs.podman-unwrapped.src}/cni/87-podman-bridge.conflist";
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virtualisation.containers = {
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enable = true; # Enable common /etc/containers configuration
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containersConf.extraConfig = lib.optionalString cfg.enableNvidia
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(builtins.readFile (toml.generate "podman.nvidia.containers.conf" {
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engine = {
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conmon_env_vars = [ "PATH=${lib.makeBinPath [ pkgs.nvidia-podman ]}" ];
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runtimes.nvidia = [ "${pkgs.nvidia-podman}/bin/nvidia-container-runtime" ];
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};
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}));
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};
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systemd.packages = [ cfg.package ];
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systemd.services.podman.serviceConfig = {
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ExecStart = [ "" "${cfg.package}/bin/podman $LOGGING system service" ];
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};
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systemd.sockets.podman.wantedBy = [ "sockets.target" ];
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systemd.tmpfiles.packages = [ cfg.package ];
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assertions = [
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{
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assertion = cfg.dockerCompat -> !config.virtualisation.docker.enable;
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message = "Option dockerCompat conflicts with docker";
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}
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];
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}
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]);
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}
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