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|
{ config, lib, pkgs, utils, ... }:
let
cfg = config.virtualisation.podman;
toml = pkgs.formats.toml { };
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" "man" ];
inherit (podmanPackage) meta;
} ''
mkdir -p $out/bin
ln -s ${podmanPackage}/bin/podman $out/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
'';
in
{
imports = [
(lib.mkRenamedOptionModule [ "virtualisation" "podman" "libpod" ] [ "virtualisation" "containers" "containersConf" ])
];
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 <command>docker</command> command.
'';
};
dockerCompat = mkOption {
type = types.bool;
default = false;
description = ''
Create an alias mapping <command>docker</command> to <command>podman</command>.
'';
};
enableNvidia = mkOption {
type = types.bool;
default = false;
description = ''
Enable use of NVidia GPUs from within podman containers.
'';
};
extraPackages = mkOption {
type = with types; listOf package;
default = [ ];
example = lib.literalExample ''
[
pkgs.gvisor
]
'';
description = ''
Extra packages to be installed in the Podman wrapper.
'';
};
package = lib.mkOption {
type = types.package;
default = podmanPackage;
internal = true;
description = ''
The final Podman package (including extra packages).
'';
};
};
config = lib.mkIf cfg.enable (lib.mkMerge [
{
environment.systemPackages = [ cfg.package ]
++ lib.optional cfg.dockerCompat dockerCompat;
environment.etc."cni/net.d/87-podman-bridge.conflist".source = utils.copyFile "${pkgs.podman-unwrapped.src}/cni/87-podman-bridge.conflist";
virtualisation.containers = {
enable = true; # Enable common /etc/containers configuration
containersConf.settings = lib.optionalAttrs cfg.enableNvidia {
engine = {
conmon_env_vars = [ "PATH=${lib.makeBinPath [ pkgs.nvidia-podman ]}" ];
runtimes.nvidia = [ "${pkgs.nvidia-podman}/bin/nvidia-container-runtime" ];
};
};
};
systemd.packages = [ cfg.package ];
systemd.services.podman.serviceConfig = {
ExecStart = [ "" "${cfg.package}/bin/podman $LOGGING system service" ];
};
systemd.sockets.podman.wantedBy = [ "sockets.target" ];
systemd.tmpfiles.packages = [ cfg.package ];
assertions = [
{
assertion = cfg.dockerCompat -> !config.virtualisation.docker.enable;
message = "Option dockerCompat conflicts with docker";
}
];
}
]);
}
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