{ config, lib, pkgs, ... }: let cfg = config.virtualisation.podman; inherit (lib) mkOption types; podmanPackage = (pkgs.podman.override { inherit (cfg) extraPackages; }); # Provides a fake "docker" binary mapping to podman dockerCompat = pkgs.runCommandNoCC "${podmanPackage.pname}-docker-compat-${podmanPackage.version}" { outputs = [ "out" "bin" "man" ]; inherit (podmanPackage) meta; } '' mkdir $out mkdir -p $bin/bin ln -s ${podmanPackage.bin}/bin/podman $bin/bin/docker mkdir -p $man/share/man/man1 for f in ${podmanPackage.man}/share/man/man1/*; do basename=$(basename $f | sed s/podman/docker/g) ln -s $f $man/share/man/man1/$basename done ''; # Copy configuration files to avoid having the entire sources in the system closure copyFile = filePath: pkgs.runCommandNoCC (builtins.unsafeDiscardStringContext (builtins.baseNameOf filePath)) {} '' cp ${filePath} $out ''; in { meta = { maintainers = lib.teams.podman.members; }; options.virtualisation.podman = { enable = mkOption { type = types.bool; default = false; description = '' This option enables Podman, a daemonless container engine for developing, managing, and running OCI Containers on your Linux System. It is a drop-in replacement for the docker command. ''; }; dockerCompat = mkOption { type = types.bool; default = false; description = '' Create an alias mapping docker to podman. ''; }; extraPackages = mkOption { type = with types; listOf package; default = [ ]; example = lib.literalExample '' [ pkgs.gvisor ] ''; description = '' Extra packages to be installed in the Podman wrapper. ''; }; libpod = mkOption { default = {}; description = "Libpod configuration"; type = types.submodule { options = { extraConfig = mkOption { type = types.lines; default = ""; description = '' Extra configuration that should be put in the libpod.conf configuration file ''; }; }; }; }; }; config = lib.mkIf cfg.enable { environment.systemPackages = [ podmanPackage ] ++ lib.optional cfg.dockerCompat dockerCompat; environment.etc."containers/libpod.conf".text = '' cni_plugin_dir = ["${pkgs.cni-plugins}/bin/"] '' + cfg.libpod.extraConfig; environment.etc."cni/net.d/87-podman-bridge.conflist".source = copyFile "${pkgs.podman-unwrapped.src}/cni/87-podman-bridge.conflist"; # Enable common /etc/containers configuration virtualisation.containers.enable = true; assertions = [{ assertion = cfg.dockerCompat -> !config.virtualisation.docker.enable; message = "Option dockerCompat conflicts with docker"; }]; }; }